1/* Interfaces to system-dependent kernel and library entries. 2 Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995, 1999, 2000, 2001, 3 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc. 4 5This file is part of GNU Emacs. 6 7GNU Emacs is free software; you can redistribute it and/or modify 8it under the terms of the GNU General Public License as published by 9the Free Software Foundation; either version 2, or (at your option) 10any later version. 11 12GNU Emacs is distributed in the hope that it will be useful, 13but WITHOUT ANY WARRANTY; without even the implied warranty of 14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15GNU General Public License for more details. 16 17You should have received a copy of the GNU General Public License 18along with GNU Emacs; see the file COPYING. If not, write to 19the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 20Boston, MA 02110-1301, USA. */ 21 22#ifdef HAVE_CONFIG_H 23#include <config.h> 24#endif 25 26#include <signal.h> 27#include <stdio.h> 28#include <setjmp.h> 29#ifdef HAVE_UNISTD_H 30#include <unistd.h> 31#endif 32#include "lisp.h" 33/* Including stdlib.h isn't necessarily enough to get srandom 34 declared, e.g. without __USE_XOPEN_EXTENDED with glibc 2. */ 35#ifdef HAVE_RANDOM 36#if 0 /* It turns out that defining _OSF_SOURCE in osf5-0.h gets 37 random prototyped as returning `int'. It looks to me as 38 though the best way to DTRT is to prefer the rand48 functions 39 (per libc.info). -- fx */ 40extern long int random P_ ((void)); 41#endif 42#if 0 /* Don't prototype srandom; it takes an unsigned argument on 43 some systems, and an unsigned long on others, like FreeBSD 44 4.1. */ 45extern void srandom P_ ((unsigned int)); 46#endif 47#endif 48 49#include "blockinput.h" 50 51#ifdef MAC_OS8 52#include <sys/param.h> 53 54#ifndef subprocesses 55/* Nonzero means delete a process right away if it exits (process.c). */ 56static int delete_exited_processes; 57#endif 58#endif /* MAC_OS8 */ 59 60#ifdef WINDOWSNT 61#define read sys_read 62#define write sys_write 63#include <windows.h> 64#ifndef NULL 65#define NULL 0 66#endif 67#endif /* not WINDOWSNT */ 68 69/* Does anyone other than VMS need this? */ 70#ifndef fwrite 71#define sys_fwrite fwrite 72#else 73#undef fwrite 74#endif 75 76#include <sys/types.h> 77#include <sys/stat.h> 78#include <errno.h> 79 80#ifdef HAVE_SETPGID 81#if !defined (USG) || defined (BSD_PGRPS) 82#undef setpgrp 83#define setpgrp setpgid 84#endif 85#endif 86 87/* Get SI_SRPC_DOMAIN, if it is available. */ 88#ifdef HAVE_SYS_SYSTEMINFO_H 89#include <sys/systeminfo.h> 90#endif 91 92#ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */ 93#include <dos.h> 94#include "dosfns.h" 95#include "msdos.h" 96#include <sys/param.h> 97 98#if __DJGPP__ > 1 99extern int etext; 100extern unsigned start __asm__ ("start"); 101#endif 102#endif 103 104#ifndef USE_CRT_DLL 105#ifndef errno 106extern int errno; 107#endif 108#endif 109 110#ifdef VMS 111#include <rms.h> 112#include <ttdef.h> 113#include <tt2def.h> 114#include <iodef.h> 115#include <ssdef.h> 116#include <descrip.h> 117#include <fibdef.h> 118#include <atrdef.h> 119#include <ctype.h> 120#include <string.h> 121#ifdef __GNUC__ 122#include <sys/file.h> 123#else 124#include <file.h> 125#endif 126#undef F_SETFL 127#ifndef RAB$C_BID 128#include <rab.h> 129#endif 130#define MAXIOSIZE (32 * PAGESIZE) /* Don't I/O more than 32 blocks at a time */ 131#endif /* VMS */ 132 133#ifndef VMS 134#include <sys/file.h> 135#endif /* not VMS */ 136 137#ifdef HAVE_FCNTL_H 138#include <fcntl.h> 139#endif 140 141#ifndef MSDOS 142#include <sys/ioctl.h> 143#endif 144 145#include "systty.h" 146#include "syswait.h" 147 148#ifdef BROKEN_TIOCGWINSZ 149#undef TIOCGWINSZ 150#undef TIOCSWINSZ 151#endif 152 153#if defined (USG) || defined (DGUX) 154#include <sys/utsname.h> 155#ifndef MEMORY_IN_STRING_H 156#include <memory.h> 157#endif 158#if defined (TIOCGWINSZ) || defined (ISC4_0) 159#ifdef NEED_SIOCTL 160#include <sys/sioctl.h> 161#endif 162#ifdef NEED_PTEM_H 163#include <sys/stream.h> 164#include <sys/ptem.h> 165#endif 166#endif /* TIOCGWINSZ or ISC4_0 */ 167#endif /* USG or DGUX */ 168 169extern int quit_char; 170 171#include "keyboard.h" 172#include "frame.h" 173#include "window.h" 174#include "termhooks.h" 175#include "termchar.h" 176#include "termopts.h" 177#include "dispextern.h" 178#include "process.h" 179 180#ifdef WINDOWSNT 181#include <direct.h> 182/* In process.h which conflicts with the local copy. */ 183#define _P_WAIT 0 184int _CRTAPI1 _spawnlp (int, const char *, const char *, ...); 185int _CRTAPI1 _getpid (void); 186extern char *getwd (char *); 187#endif 188 189#ifdef NONSYSTEM_DIR_LIBRARY 190#include "ndir.h" 191#endif /* NONSYSTEM_DIR_LIBRARY */ 192 193#include "syssignal.h" 194#include "systime.h" 195#ifdef HAVE_UTIME_H 196#include <utime.h> 197#endif 198 199#ifndef HAVE_UTIMES 200#ifndef HAVE_STRUCT_UTIMBUF 201/* We want to use utime rather than utimes, but we couldn't find the 202 structure declaration. We'll use the traditional one. */ 203struct utimbuf { 204 long actime; 205 long modtime; 206}; 207#endif 208#endif 209 210/* LPASS8 is new in 4.3, and makes cbreak mode provide all 8 bits. */ 211#ifndef LPASS8 212#define LPASS8 0 213#endif 214 215#ifdef BSD4_1 216#define LNOFLSH 0100000 217#endif 218 219static int baud_convert[] = 220#ifdef BAUD_CONVERT 221 BAUD_CONVERT; 222#else 223 { 224 0, 50, 75, 110, 135, 150, 200, 300, 600, 1200, 225 1800, 2400, 4800, 9600, 19200, 38400 226 }; 227#endif 228 229#ifdef HAVE_SPEED_T 230#include <termios.h> 231#else 232#if defined (HAVE_LIBNCURSES) && ! defined (NCURSES_OSPEED_T) 233#else 234#if defined (HAVE_TERMIOS_H) && defined (GNU_LINUX) 235#include <termios.h> 236#endif 237#endif 238#endif 239 240int emacs_ospeed; 241 242/* The file descriptor for Emacs's input terminal. 243 Under Unix, this is normally zero except when using X; 244 under VMS, we place the input channel number here. */ 245int input_fd; 246 247void croak P_ ((char *)) NO_RETURN; 248 249#ifdef AIXHFT 250void hft_init (); 251void hft_reset (); 252#endif 253 254/* Temporary used by `sigblock' when defined in terms of signprocmask. */ 255 256SIGMASKTYPE sigprocmask_set; 257 258 259#if !defined (HAVE_GET_CURRENT_DIR_NAME) || defined (BROKEN_GET_CURRENT_DIR_NAME) 260 261/* Return the current working directory. Returns NULL on errors. 262 Any other returned value must be freed with free. This is used 263 only when get_current_dir_name is not defined on the system. */ 264char* 265get_current_dir_name () 266{ 267 char *buf; 268 char *pwd; 269 struct stat dotstat, pwdstat; 270 /* If PWD is accurate, use it instead of calling getwd. PWD is 271 sometimes a nicer name, and using it may avoid a fatal error if a 272 parent directory is searchable but not readable. */ 273 if ((pwd = getenv ("PWD")) != 0 274 && (IS_DIRECTORY_SEP (*pwd) || (*pwd && IS_DEVICE_SEP (pwd[1]))) 275 && stat (pwd, &pwdstat) == 0 276 && stat (".", &dotstat) == 0 277 && dotstat.st_ino == pwdstat.st_ino 278 && dotstat.st_dev == pwdstat.st_dev 279#ifdef MAXPATHLEN 280 && strlen (pwd) < MAXPATHLEN 281#endif 282 ) 283 { 284 buf = (char *) malloc (strlen (pwd) + 1); 285 if (!buf) 286 return NULL; 287 strcpy (buf, pwd); 288 } 289#ifdef HAVE_GETCWD 290 else 291 { 292 size_t buf_size = 1024; 293 buf = (char *) malloc (buf_size); 294 if (!buf) 295 return NULL; 296 for (;;) 297 { 298 if (getcwd (buf, buf_size) == buf) 299 break; 300 if (errno != ERANGE) 301 { 302 int tmp_errno = errno; 303 free (buf); 304 errno = tmp_errno; 305 return NULL; 306 } 307 buf_size *= 2; 308 buf = (char *) realloc (buf, buf_size); 309 if (!buf) 310 return NULL; 311 } 312 } 313#else 314 else 315 { 316 /* We need MAXPATHLEN here. */ 317 buf = (char *) malloc (MAXPATHLEN + 1); 318 if (!buf) 319 return NULL; 320 if (getwd (buf) == NULL) 321 { 322 int tmp_errno = errno; 323 free (buf); 324 errno = tmp_errno; 325 return NULL; 326 } 327 } 328#endif 329 return buf; 330} 331#endif 332 333 334/* Specify a different file descriptor for further input operations. */ 335 336void 337change_input_fd (fd) 338 int fd; 339{ 340 input_fd = fd; 341} 342 343/* Discard pending input on descriptor input_fd. */ 344 345void 346discard_tty_input () 347{ 348#ifndef WINDOWSNT 349 struct emacs_tty buf; 350 351 if (noninteractive) 352 return; 353 354 /* Discarding input is not safe when the input could contain 355 replies from the X server. So don't do it. */ 356 if (read_socket_hook) 357 return; 358 359#ifdef VMS 360 end_kbd_input (); 361 SYS$QIOW (0, input_fd, IO$_READVBLK|IO$M_PURGE, input_iosb, 0, 0, 362 &buf.main, 0, 0, terminator_mask, 0, 0); 363 queue_kbd_input (); 364#else /* not VMS */ 365#ifdef APOLLO 366 { 367 int zero = 0; 368 ioctl (input_fd, TIOCFLUSH, &zero); 369 } 370#else /* not Apollo */ 371#ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */ 372 while (dos_keyread () != -1) 373 ; 374#else /* not MSDOS */ 375 EMACS_GET_TTY (input_fd, &buf); 376 EMACS_SET_TTY (input_fd, &buf, 0); 377#endif /* not MSDOS */ 378#endif /* not Apollo */ 379#endif /* not VMS */ 380#endif /* not WINDOWSNT */ 381} 382 383#ifdef SIGTSTP 384 385/* Arrange for character C to be read as the next input from 386 the terminal. */ 387 388void 389#ifdef PROTOTYPES 390stuff_char (char c) 391#else 392stuff_char (c) 393 char c; 394#endif 395{ 396 if (read_socket_hook) 397 return; 398 399/* Should perhaps error if in batch mode */ 400#ifdef TIOCSTI 401 ioctl (input_fd, TIOCSTI, &c); 402#else /* no TIOCSTI */ 403 error ("Cannot stuff terminal input characters in this version of Unix"); 404#endif /* no TIOCSTI */ 405} 406 407#endif /* SIGTSTP */ 408 409void 410init_baud_rate () 411{ 412 if (noninteractive) 413 emacs_ospeed = 0; 414 else 415 { 416#ifdef INIT_BAUD_RATE 417 INIT_BAUD_RATE (); 418#else 419#ifdef DOS_NT 420 emacs_ospeed = 15; 421#else /* not DOS_NT */ 422#ifdef VMS 423 struct sensemode sg; 424 425 SYS$QIOW (0, input_fd, IO$_SENSEMODE, &sg, 0, 0, 426 &sg.class, 12, 0, 0, 0, 0 ); 427 emacs_ospeed = sg.xmit_baud; 428#else /* not VMS */ 429#ifdef HAVE_TERMIOS 430 struct termios sg; 431 432 sg.c_cflag = B9600; 433 tcgetattr (input_fd, &sg); 434 emacs_ospeed = cfgetospeed (&sg); 435#if defined (USE_GETOBAUD) && defined (getobaud) 436 /* m88k-motorola-sysv3 needs this (ghazi@noc.rutgers.edu) 9/1/94. */ 437 if (emacs_ospeed == 0) 438 emacs_ospeed = getobaud (sg.c_cflag); 439#endif 440#else /* neither VMS nor TERMIOS */ 441#ifdef HAVE_TERMIO 442 struct termio sg; 443 444 sg.c_cflag = B9600; 445#ifdef HAVE_TCATTR 446 tcgetattr (input_fd, &sg); 447#else 448 ioctl (input_fd, TCGETA, &sg); 449#endif 450 emacs_ospeed = sg.c_cflag & CBAUD; 451#else /* neither VMS nor TERMIOS nor TERMIO */ 452 struct sgttyb sg; 453 454 sg.sg_ospeed = B9600; 455 if (ioctl (input_fd, TIOCGETP, &sg) < 0) 456 abort (); 457 emacs_ospeed = sg.sg_ospeed; 458#endif /* not HAVE_TERMIO */ 459#endif /* not HAVE_TERMIOS */ 460#endif /* not VMS */ 461#endif /* not DOS_NT */ 462#endif /* not INIT_BAUD_RATE */ 463 } 464 465 baud_rate = (emacs_ospeed < sizeof baud_convert / sizeof baud_convert[0] 466 ? baud_convert[emacs_ospeed] : 9600); 467 if (baud_rate == 0) 468 baud_rate = 1200; 469} 470 471/*ARGSUSED*/ 472void 473set_exclusive_use (fd) 474 int fd; 475{ 476#ifdef FIOCLEX 477 ioctl (fd, FIOCLEX, 0); 478#endif 479 /* Ok to do nothing if this feature does not exist */ 480} 481 482#ifndef subprocesses 483 484wait_without_blocking () 485{ 486#ifdef BSD_SYSTEM 487 wait3 (0, WNOHANG | WUNTRACED, 0); 488#else 489 croak ("wait_without_blocking"); 490#endif 491 synch_process_alive = 0; 492} 493 494#endif /* not subprocesses */ 495 496int wait_debugging; /* Set nonzero to make following function work under dbx 497 (at least for bsd). */ 498 499SIGTYPE 500wait_for_termination_signal () 501{} 502 503/* Wait for subprocess with process id `pid' to terminate and 504 make sure it will get eliminated (not remain forever as a zombie) */ 505 506void 507wait_for_termination (pid) 508 int pid; 509{ 510 while (1) 511 { 512#ifdef subprocesses 513#ifdef VMS 514 int status; 515 516 status = SYS$FORCEX (&pid, 0, 0); 517 break; 518#else /* not VMS */ 519#if defined (BSD_SYSTEM) || (defined (HPUX) && !defined (HPUX_5)) 520 /* Note that kill returns -1 even if the process is just a zombie now. 521 But inevitably a SIGCHLD interrupt should be generated 522 and child_sig will do wait3 and make the process go away. */ 523 /* There is some indication that there is a bug involved with 524 termination of subprocesses, perhaps involving a kernel bug too, 525 but no idea what it is. Just as a hunch we signal SIGCHLD to see 526 if that causes the problem to go away or get worse. */ 527 sigsetmask (sigmask (SIGCHLD)); 528 if (0 > kill (pid, 0)) 529 { 530 sigsetmask (SIGEMPTYMASK); 531 kill (getpid (), SIGCHLD); 532 break; 533 } 534 if (wait_debugging) 535 sleep (1); 536 else 537 sigpause (SIGEMPTYMASK); 538#else /* not BSD_SYSTEM, and not HPUX version >= 6 */ 539#if defined (UNIPLUS) 540 if (0 > kill (pid, 0)) 541 break; 542 wait (0); 543#else /* neither BSD_SYSTEM nor UNIPLUS: random sysV */ 544#ifdef POSIX_SIGNALS /* would this work for GNU/Linux as well? */ 545 sigblock (sigmask (SIGCHLD)); 546 errno = 0; 547 if (kill (pid, 0) == -1 && errno == ESRCH) 548 { 549 sigunblock (sigmask (SIGCHLD)); 550 break; 551 } 552 553 sigsuspend (&empty_mask); 554#else /* not POSIX_SIGNALS */ 555#ifdef HAVE_SYSV_SIGPAUSE 556 sighold (SIGCHLD); 557 if (0 > kill (pid, 0)) 558 { 559 sigrelse (SIGCHLD); 560 break; 561 } 562 sigpause (SIGCHLD); 563#else /* not HAVE_SYSV_SIGPAUSE */ 564#ifdef WINDOWSNT 565 wait (0); 566 break; 567#else /* not WINDOWSNT */ 568 if (0 > kill (pid, 0)) 569 break; 570 /* Using sleep instead of pause avoids timing error. 571 If the inferior dies just before the sleep, 572 we lose just one second. */ 573 sleep (1); 574#endif /* not WINDOWSNT */ 575#endif /* not HAVE_SYSV_SIGPAUSE */ 576#endif /* not POSIX_SIGNALS */ 577#endif /* not UNIPLUS */ 578#endif /* not BSD_SYSTEM, and not HPUX version >= 6 */ 579#endif /* not VMS */ 580#else /* not subprocesses */ 581#if __DJGPP__ > 1 582 break; 583#else /* not __DJGPP__ > 1 */ 584#ifndef BSD4_1 585 if (kill (pid, 0) < 0) 586 break; 587 wait (0); 588#else /* BSD4_1 */ 589 int status; 590 status = wait (0); 591 if (status == pid || status == -1) 592 break; 593#endif /* BSD4_1 */ 594#endif /* not __DJGPP__ > 1*/ 595#endif /* not subprocesses */ 596 } 597} 598 599#ifdef subprocesses 600 601/* 602 * flush any pending output 603 * (may flush input as well; it does not matter the way we use it) 604 */ 605 606void 607flush_pending_output (channel) 608 int channel; 609{ 610#ifdef HAVE_TERMIOS 611 /* If we try this, we get hit with SIGTTIN, because 612 the child's tty belongs to the child's pgrp. */ 613#else 614#ifdef TCFLSH 615 ioctl (channel, TCFLSH, 1); 616#else 617#ifdef TIOCFLUSH 618 int zero = 0; 619 /* 3rd arg should be ignored 620 but some 4.2 kernels actually want the address of an int 621 and nonzero means something different. */ 622 ioctl (channel, TIOCFLUSH, &zero); 623#endif 624#endif 625#endif 626} 627 628#ifndef VMS 629/* Set up the terminal at the other end of a pseudo-terminal that 630 we will be controlling an inferior through. 631 It should not echo or do line-editing, since that is done 632 in Emacs. No padding needed for insertion into an Emacs buffer. */ 633 634void 635child_setup_tty (out) 636 int out; 637{ 638#ifndef DOS_NT 639 struct emacs_tty s; 640 641 EMACS_GET_TTY (out, &s); 642 643#if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS) 644 s.main.c_oflag |= OPOST; /* Enable output postprocessing */ 645 s.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL on output */ 646#ifdef NLDLY 647 s.main.c_oflag &= ~(NLDLY|CRDLY|TABDLY|BSDLY|VTDLY|FFDLY); 648 /* No output delays */ 649#endif 650 s.main.c_lflag &= ~ECHO; /* Disable echo */ 651 s.main.c_lflag |= ISIG; /* Enable signals */ 652#if 0 /* This causes bugs in (for instance) telnet to certain sites. */ 653 s.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */ 654#ifdef INLCR /* Just being cautious, since I can't check how 655 widespread INLCR is--rms. */ 656 s.main.c_iflag &= ~INLCR; /* Disable map of NL to CR on input */ 657#endif 658#endif 659#ifdef IUCLC 660 s.main.c_iflag &= ~IUCLC; /* Disable downcasing on input. */ 661#endif 662#ifdef ISTRIP 663 s.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */ 664#endif 665#ifdef OLCUC 666 s.main.c_oflag &= ~OLCUC; /* Disable upcasing on output. */ 667#endif 668 s.main.c_oflag &= ~TAB3; /* Disable tab expansion */ 669 s.main.c_cflag = (s.main.c_cflag & ~CSIZE) | CS8; /* Don't strip 8th bit */ 670#if 0 671 /* Said to be unnecessary: */ 672 s.main.c_cc[VMIN] = 1; /* minimum number of characters to accept */ 673 s.main.c_cc[VTIME] = 0; /* wait forever for at least 1 character */ 674#endif 675 676 s.main.c_lflag |= ICANON; /* Enable erase/kill and eof processing */ 677 s.main.c_cc[VEOF] = 04; /* insure that EOF is Control-D */ 678 s.main.c_cc[VERASE] = CDISABLE; /* disable erase processing */ 679 s.main.c_cc[VKILL] = CDISABLE; /* disable kill processing */ 680 681#ifdef HPUX 682 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */ 683#endif /* HPUX */ 684 685#ifdef SIGNALS_VIA_CHARACTERS 686 /* the QUIT and INTR character are used in process_send_signal 687 so set them here to something useful. */ 688 if (s.main.c_cc[VQUIT] == CDISABLE) 689 s.main.c_cc[VQUIT] = '\\'&037; /* Control-\ */ 690 if (s.main.c_cc[VINTR] == CDISABLE) 691 s.main.c_cc[VINTR] = 'C'&037; /* Control-C */ 692#endif /* not SIGNALS_VIA_CHARACTERS */ 693 694#ifdef AIX 695/* AIX enhanced edit loses NULs, so disable it */ 696#ifndef IBMR2AIX 697 s.main.c_line = 0; 698 s.main.c_iflag &= ~ASCEDIT; 699#endif 700 /* Also, PTY overloads NUL and BREAK. 701 don't ignore break, but don't signal either, so it looks like NUL. */ 702 s.main.c_iflag &= ~IGNBRK; 703 s.main.c_iflag &= ~BRKINT; 704 /* rms: Formerly it set s.main.c_cc[VINTR] to 0377 here 705 unconditionally. Then a SIGNALS_VIA_CHARACTERS conditional 706 would force it to 0377. That looks like duplicated code. */ 707#ifndef SIGNALS_VIA_CHARACTERS 708 /* QUIT and INTR work better as signals, so disable character forms */ 709 s.main.c_cc[VQUIT] = CDISABLE; 710 s.main.c_cc[VINTR] = CDISABLE; 711 s.main.c_lflag &= ~ISIG; 712#endif /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */ 713 s.main.c_cc[VEOL] = CDISABLE; 714 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */ 715#endif /* AIX */ 716 717#else /* not HAVE_TERMIO */ 718 719 s.main.sg_flags &= ~(ECHO | CRMOD | ANYP | ALLDELAY | RAW | LCASE 720 | CBREAK | TANDEM); 721 s.main.sg_flags |= LPASS8; 722 s.main.sg_erase = 0377; 723 s.main.sg_kill = 0377; 724 s.lmode = LLITOUT | s.lmode; /* Don't strip 8th bit */ 725 726#endif /* not HAVE_TERMIO */ 727 728 EMACS_SET_TTY (out, &s, 0); 729 730#ifdef BSD4_1 731 if (interrupt_input) 732 reset_sigio (); 733#endif /* BSD4_1 */ 734#ifdef RTU 735 { 736 int zero = 0; 737 ioctl (out, FIOASYNC, &zero); 738 } 739#endif /* RTU */ 740#endif /* not DOS_NT */ 741} 742#endif /* not VMS */ 743 744#endif /* subprocesses */ 745 746/* Record a signal code and the handler for it. */ 747struct save_signal 748{ 749 int code; 750 SIGTYPE (*handler) P_ ((int)); 751}; 752 753static void save_signal_handlers P_ ((struct save_signal *)); 754static void restore_signal_handlers P_ ((struct save_signal *)); 755 756/* Suspend the Emacs process; give terminal to its superior. */ 757 758void 759sys_suspend () 760{ 761#ifdef VMS 762 /* "Foster" parentage allows emacs to return to a subprocess that attached 763 to the current emacs as a cheaper than starting a whole new process. This 764 is set up by KEPTEDITOR.COM. */ 765 unsigned long parent_id, foster_parent_id; 766 char *fpid_string; 767 768 fpid_string = getenv ("EMACS_PARENT_PID"); 769 if (fpid_string != NULL) 770 { 771 sscanf (fpid_string, "%x", &foster_parent_id); 772 if (foster_parent_id != 0) 773 parent_id = foster_parent_id; 774 else 775 parent_id = getppid (); 776 } 777 else 778 parent_id = getppid (); 779 780 xfree (fpid_string); /* On VMS, this was malloc'd */ 781 782 if (parent_id && parent_id != 0xffffffff) 783 { 784 SIGTYPE (*oldsig)() = (int) signal (SIGINT, SIG_IGN); 785 int status = LIB$ATTACH (&parent_id) & 1; 786 signal (SIGINT, oldsig); 787 return status; 788 } 789 else 790 { 791 struct { 792 int l; 793 char *a; 794 } d_prompt; 795 d_prompt.l = sizeof ("Emacs: "); /* Our special prompt */ 796 d_prompt.a = "Emacs: "; /* Just a reminder */ 797 LIB$SPAWN (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, &d_prompt, 0); 798 return 1; 799 } 800 return -1; 801#else 802#if defined (SIGTSTP) && !defined (MSDOS) 803 804 { 805 int pgrp = EMACS_GETPGRP (0); 806 EMACS_KILLPG (pgrp, SIGTSTP); 807 } 808 809#else /* No SIGTSTP */ 810#ifdef USG_JOBCTRL /* If you don't know what this is don't mess with it */ 811 ptrace (0, 0, 0, 0); /* set for ptrace - caught by csh */ 812 kill (getpid (), SIGQUIT); 813 814#else /* No SIGTSTP or USG_JOBCTRL */ 815 816/* On a system where suspending is not implemented, 817 instead fork a subshell and let it talk directly to the terminal 818 while we wait. */ 819 sys_subshell (); 820 821#endif /* no USG_JOBCTRL */ 822#endif /* no SIGTSTP */ 823#endif /* not VMS */ 824} 825 826/* Fork a subshell. */ 827 828#ifndef MAC_OS8 829void 830sys_subshell () 831{ 832#ifndef VMS 833#ifdef DOS_NT /* Demacs 1.1.2 91/10/20 Manabu Higashida */ 834 int st; 835 char oldwd[MAXPATHLEN+1]; /* Fixed length is safe on MSDOS. */ 836#endif 837 int pid; 838 struct save_signal saved_handlers[5]; 839 Lisp_Object dir; 840 unsigned char *str = 0; 841 int len; 842 843 saved_handlers[0].code = SIGINT; 844 saved_handlers[1].code = SIGQUIT; 845 saved_handlers[2].code = SIGTERM; 846#ifdef SIGIO 847 saved_handlers[3].code = SIGIO; 848 saved_handlers[4].code = 0; 849#else 850 saved_handlers[3].code = 0; 851#endif 852 853 /* Mentioning current_buffer->buffer would mean including buffer.h, 854 which somehow wedges the hp compiler. So instead... */ 855 856 dir = intern ("default-directory"); 857 if (NILP (Fboundp (dir))) 858 goto xyzzy; 859 dir = Fsymbol_value (dir); 860 if (!STRINGP (dir)) 861 goto xyzzy; 862 863 dir = expand_and_dir_to_file (Funhandled_file_name_directory (dir), Qnil); 864 str = (unsigned char *) alloca (SCHARS (dir) + 2); 865 len = SCHARS (dir); 866 bcopy (SDATA (dir), str, len); 867 if (str[len - 1] != '/') str[len++] = '/'; 868 str[len] = 0; 869 xyzzy: 870 871#ifdef DOS_NT 872 pid = 0; 873#if __DJGPP__ > 1 874 save_signal_handlers (saved_handlers); 875 synch_process_alive = 1; 876#endif /* __DJGPP__ > 1 */ 877#else 878 pid = vfork (); 879 if (pid == -1) 880 error ("Can't spawn subshell"); 881#endif 882 883 if (pid == 0) 884 { 885 char *sh = 0; 886 887#ifdef DOS_NT /* MW, Aug 1993 */ 888 getwd (oldwd); 889 if (sh == 0) 890 sh = (char *) egetenv ("SUSPEND"); /* KFS, 1994-12-14 */ 891#endif 892 if (sh == 0) 893 sh = (char *) egetenv ("SHELL"); 894 if (sh == 0) 895 sh = "sh"; 896 897 /* Use our buffer's default directory for the subshell. */ 898 if (str) 899 chdir ((char *) str); 900 901#ifdef subprocesses 902 close_process_descs (); /* Close Emacs's pipes/ptys */ 903#endif 904 905#ifdef SET_EMACS_PRIORITY 906 { 907 extern EMACS_INT emacs_priority; 908 909 if (emacs_priority < 0) 910 nice (-emacs_priority); 911 } 912#endif 913 914#ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */ 915 { 916 char *epwd = getenv ("PWD"); 917 char old_pwd[MAXPATHLEN+1+4]; 918 919 /* If PWD is set, pass it with corrected value. */ 920 if (epwd) 921 { 922 strcpy (old_pwd, epwd); 923 if (str[len - 1] == '/') 924 str[len - 1] = '\0'; 925 setenv ("PWD", str, 1); 926 } 927 st = system (sh); 928 chdir (oldwd); 929 if (epwd) 930 putenv (old_pwd); /* restore previous value */ 931 } 932#if 0 /* This is also reported if last command executed in subshell failed, KFS */ 933 if (st) 934 report_file_error ("Can't execute subshell", Fcons (build_string (sh), Qnil)); 935#endif 936#else /* not MSDOS */ 937#ifdef WINDOWSNT 938 /* Waits for process completion */ 939 pid = _spawnlp (_P_WAIT, sh, sh, NULL); 940 chdir (oldwd); 941 if (pid == -1) 942 write (1, "Can't execute subshell", 22); 943#else /* not WINDOWSNT */ 944 execlp (sh, sh, (char *) 0); 945 write (1, "Can't execute subshell", 22); 946 _exit (1); 947#endif /* not WINDOWSNT */ 948#endif /* not MSDOS */ 949 } 950 951 /* Do this now if we did not do it before. */ 952#if !defined (MSDOS) || __DJGPP__ == 1 953 save_signal_handlers (saved_handlers); 954 synch_process_alive = 1; 955#endif 956 957#ifndef DOS_NT 958 wait_for_termination (pid); 959#endif 960 restore_signal_handlers (saved_handlers); 961 synch_process_alive = 0; 962#endif /* !VMS */ 963} 964#endif /* !MAC_OS8 */ 965 966static void 967save_signal_handlers (saved_handlers) 968 struct save_signal *saved_handlers; 969{ 970 while (saved_handlers->code) 971 { 972 saved_handlers->handler 973 = (SIGTYPE (*) P_ ((int))) signal (saved_handlers->code, SIG_IGN); 974 saved_handlers++; 975 } 976} 977 978static void 979restore_signal_handlers (saved_handlers) 980 struct save_signal *saved_handlers; 981{ 982 while (saved_handlers->code) 983 { 984 signal (saved_handlers->code, saved_handlers->handler); 985 saved_handlers++; 986 } 987} 988 989#ifdef F_SETFL 990 991int old_fcntl_flags; 992 993void 994init_sigio (fd) 995 int fd; 996{ 997#ifdef FASYNC 998 old_fcntl_flags = fcntl (fd, F_GETFL, 0) & ~FASYNC; 999 fcntl (fd, F_SETFL, old_fcntl_flags | FASYNC); 1000#endif 1001 interrupts_deferred = 0; 1002} 1003 1004void 1005reset_sigio () 1006{ 1007 unrequest_sigio (); 1008} 1009 1010#ifdef FASYNC /* F_SETFL does not imply existence of FASYNC */ 1011 1012void 1013request_sigio () 1014{ 1015 if (noninteractive || read_socket_hook) 1016 return; 1017 1018#ifdef SIGWINCH 1019 sigunblock (sigmask (SIGWINCH)); 1020#endif 1021 fcntl (input_fd, F_SETFL, old_fcntl_flags | FASYNC); 1022 1023 interrupts_deferred = 0; 1024} 1025 1026void 1027unrequest_sigio () 1028{ 1029 if (noninteractive || read_socket_hook) 1030 return; 1031 1032#ifdef SIGWINCH 1033 sigblock (sigmask (SIGWINCH)); 1034#endif 1035 fcntl (input_fd, F_SETFL, old_fcntl_flags); 1036 interrupts_deferred = 1; 1037} 1038 1039#else /* no FASYNC */ 1040#ifdef STRIDE /* Stride doesn't have FASYNC - use FIOASYNC */ 1041 1042void 1043request_sigio () 1044{ 1045 int on = 1; 1046 1047 if (noninteractive || read_socket_hook) 1048 return; 1049 1050 ioctl (input_fd, FIOASYNC, &on); 1051 interrupts_deferred = 0; 1052} 1053 1054void 1055unrequest_sigio () 1056{ 1057 int off = 0; 1058 1059 if (noninteractive || read_socket_hook) 1060 return; 1061 1062 ioctl (input_fd, FIOASYNC, &off); 1063 interrupts_deferred = 1; 1064} 1065 1066#else /* not FASYNC, not STRIDE */ 1067 1068#ifdef _CX_UX 1069 1070#include <termios.h> 1071 1072void 1073request_sigio () 1074{ 1075 int on = 1; 1076 sigset_t st; 1077 1078 if (noninteractive || read_socket_hook) 1079 return; 1080 1081 sigemptyset (&st); 1082 sigaddset (&st, SIGIO); 1083 ioctl (input_fd, FIOASYNC, &on); 1084 interrupts_deferred = 0; 1085 sigprocmask (SIG_UNBLOCK, &st, (sigset_t *)0); 1086} 1087 1088void 1089unrequest_sigio () 1090{ 1091 int off = 0; 1092 1093 if (noninteractive || read_socket_hook) 1094 return; 1095 1096 ioctl (input_fd, FIOASYNC, &off); 1097 interrupts_deferred = 1; 1098} 1099 1100#else /* ! _CX_UX */ 1101#ifndef MSDOS 1102 1103void 1104request_sigio () 1105{ 1106 if (noninteractive || read_socket_hook) 1107 return; 1108 1109 croak ("request_sigio"); 1110} 1111 1112void 1113unrequest_sigio () 1114{ 1115 if (noninteractive || read_socket_hook) 1116 return; 1117 1118 croak ("unrequest_sigio"); 1119} 1120 1121#endif /* MSDOS */ 1122#endif /* _CX_UX */ 1123#endif /* STRIDE */ 1124#endif /* FASYNC */ 1125#endif /* F_SETFL */ 1126 1127/* Saving and restoring the process group of Emacs's terminal. */ 1128 1129#ifdef BSD_PGRPS 1130 1131/* The process group of which Emacs was a member when it initially 1132 started. 1133 1134 If Emacs was in its own process group (i.e. inherited_pgroup == 1135 getpid ()), then we know we're running under a shell with job 1136 control (Emacs would never be run as part of a pipeline). 1137 Everything is fine. 1138 1139 If Emacs was not in its own process group, then we know we're 1140 running under a shell (or a caller) that doesn't know how to 1141 separate itself from Emacs (like sh). Emacs must be in its own 1142 process group in order to receive SIGIO correctly. In this 1143 situation, we put ourselves in our own pgroup, forcibly set the 1144 tty's pgroup to our pgroup, and make sure to restore and reinstate 1145 the tty's pgroup just like any other terminal setting. If 1146 inherited_group was not the tty's pgroup, then we'll get a 1147 SIGTTmumble when we try to change the tty's pgroup, and a CONT if 1148 it goes foreground in the future, which is what should happen. */ 1149int inherited_pgroup; 1150 1151/* Split off the foreground process group to Emacs alone. 1152 When we are in the foreground, but not started in our own process 1153 group, redirect the TTY to point to our own process group. We need 1154 to be in our own process group to receive SIGIO properly. */ 1155void 1156narrow_foreground_group () 1157{ 1158 int me = getpid (); 1159 1160 setpgrp (0, inherited_pgroup); 1161 if (inherited_pgroup != me) 1162 EMACS_SET_TTY_PGRP (input_fd, &me); 1163 setpgrp (0, me); 1164} 1165 1166/* Set the tty to our original foreground group. */ 1167void 1168widen_foreground_group () 1169{ 1170 if (inherited_pgroup != getpid ()) 1171 EMACS_SET_TTY_PGRP (input_fd, &inherited_pgroup); 1172 setpgrp (0, inherited_pgroup); 1173} 1174 1175#endif /* BSD_PGRPS */ 1176 1177/* Getting and setting emacs_tty structures. */ 1178 1179/* Set *TC to the parameters associated with the terminal FD. 1180 Return zero if all's well, or -1 if we ran into an error we 1181 couldn't deal with. */ 1182int 1183emacs_get_tty (fd, settings) 1184 int fd; 1185 struct emacs_tty *settings; 1186{ 1187 /* Retrieve the primary parameters - baud rate, character size, etcetera. */ 1188#ifdef HAVE_TCATTR 1189 /* We have those nifty POSIX tcmumbleattr functions. */ 1190 bzero (&settings->main, sizeof (settings->main)); 1191 if (tcgetattr (fd, &settings->main) < 0) 1192 return -1; 1193 1194#else 1195#ifdef HAVE_TERMIO 1196 /* The SYSV-style interface? */ 1197 if (ioctl (fd, TCGETA, &settings->main) < 0) 1198 return -1; 1199 1200#else 1201#ifdef VMS 1202 /* Vehemently Monstrous System? :-) */ 1203 if (! (SYS$QIOW (0, fd, IO$_SENSEMODE, settings, 0, 0, 1204 &settings->main.class, 12, 0, 0, 0, 0) 1205 & 1)) 1206 return -1; 1207 1208#else 1209#ifndef DOS_NT 1210 /* I give up - I hope you have the BSD ioctls. */ 1211 if (ioctl (fd, TIOCGETP, &settings->main) < 0) 1212 return -1; 1213#endif /* not DOS_NT */ 1214#endif 1215#endif 1216#endif 1217 1218 /* Suivant - Do we have to get struct ltchars data? */ 1219#ifdef HAVE_LTCHARS 1220 if (ioctl (fd, TIOCGLTC, &settings->ltchars) < 0) 1221 return -1; 1222#endif 1223 1224 /* How about a struct tchars and a wordful of lmode bits? */ 1225#ifdef HAVE_TCHARS 1226 if (ioctl (fd, TIOCGETC, &settings->tchars) < 0 1227 || ioctl (fd, TIOCLGET, &settings->lmode) < 0) 1228 return -1; 1229#endif 1230 1231 /* We have survived the tempest. */ 1232 return 0; 1233} 1234 1235 1236/* Set the parameters of the tty on FD according to the contents of 1237 *SETTINGS. If FLUSHP is non-zero, we discard input. 1238 Return 0 if all went well, and -1 if anything failed. */ 1239 1240int 1241emacs_set_tty (fd, settings, flushp) 1242 int fd; 1243 struct emacs_tty *settings; 1244 int flushp; 1245{ 1246 /* Set the primary parameters - baud rate, character size, etcetera. */ 1247#ifdef HAVE_TCATTR 1248 int i; 1249 /* We have those nifty POSIX tcmumbleattr functions. 1250 William J. Smith <wjs@wiis.wang.com> writes: 1251 "POSIX 1003.1 defines tcsetattr to return success if it was 1252 able to perform any of the requested actions, even if some 1253 of the requested actions could not be performed. 1254 We must read settings back to ensure tty setup properly. 1255 AIX requires this to keep tty from hanging occasionally." */ 1256 /* This make sure that we don't loop indefinitely in here. */ 1257 for (i = 0 ; i < 10 ; i++) 1258 if (tcsetattr (fd, flushp ? TCSAFLUSH : TCSADRAIN, &settings->main) < 0) 1259 { 1260 if (errno == EINTR) 1261 continue; 1262 else 1263 return -1; 1264 } 1265 else 1266 { 1267 struct termios new; 1268 1269 bzero (&new, sizeof (new)); 1270 /* Get the current settings, and see if they're what we asked for. */ 1271 tcgetattr (fd, &new); 1272 /* We cannot use memcmp on the whole structure here because under 1273 * aix386 the termios structure has some reserved field that may 1274 * not be filled in. 1275 */ 1276 if ( new.c_iflag == settings->main.c_iflag 1277 && new.c_oflag == settings->main.c_oflag 1278 && new.c_cflag == settings->main.c_cflag 1279 && new.c_lflag == settings->main.c_lflag 1280 && memcmp (new.c_cc, settings->main.c_cc, NCCS) == 0) 1281 break; 1282 else 1283 continue; 1284 } 1285 1286#else 1287#ifdef HAVE_TERMIO 1288 /* The SYSV-style interface? */ 1289 if (ioctl (fd, flushp ? TCSETAF : TCSETAW, &settings->main) < 0) 1290 return -1; 1291 1292#else 1293#ifdef VMS 1294 /* Vehemently Monstrous System? :-) */ 1295 if (! (SYS$QIOW (0, fd, IO$_SETMODE, &input_iosb, 0, 0, 1296 &settings->main.class, 12, 0, 0, 0, 0) 1297 & 1)) 1298 return -1; 1299 1300#else 1301#ifndef DOS_NT 1302 /* I give up - I hope you have the BSD ioctls. */ 1303 if (ioctl (fd, (flushp) ? TIOCSETP : TIOCSETN, &settings->main) < 0) 1304 return -1; 1305#endif /* not DOS_NT */ 1306 1307#endif 1308#endif 1309#endif 1310 1311 /* Suivant - Do we have to get struct ltchars data? */ 1312#ifdef HAVE_LTCHARS 1313 if (ioctl (fd, TIOCSLTC, &settings->ltchars) < 0) 1314 return -1; 1315#endif 1316 1317 /* How about a struct tchars and a wordful of lmode bits? */ 1318#ifdef HAVE_TCHARS 1319 if (ioctl (fd, TIOCSETC, &settings->tchars) < 0 1320 || ioctl (fd, TIOCLSET, &settings->lmode) < 0) 1321 return -1; 1322#endif 1323 1324 /* We have survived the tempest. */ 1325 return 0; 1326} 1327 1328 1329/* The initial tty mode bits */ 1330struct emacs_tty old_tty; 1331 1332/* 1 if we have been through init_sys_modes. */ 1333int term_initted; 1334 1335/* 1 if outer tty status has been recorded. */ 1336int old_tty_valid; 1337 1338#ifdef BSD4_1 1339/* BSD 4.1 needs to keep track of the lmode bits in order to start 1340 sigio. */ 1341int lmode; 1342#endif 1343 1344#ifndef F_SETOWN_BUG 1345#ifdef F_SETOWN 1346int old_fcntl_owner; 1347#endif /* F_SETOWN */ 1348#endif /* F_SETOWN_BUG */ 1349 1350/* This may also be defined in stdio, 1351 but if so, this does no harm, 1352 and using the same name avoids wasting the other one's space. */ 1353 1354#ifdef nec_ews_svr4 1355extern char *_sobuf ; 1356#else 1357#if defined (USG) || defined (DGUX) 1358unsigned char _sobuf[BUFSIZ+8]; 1359#else 1360char _sobuf[BUFSIZ]; 1361#endif 1362#endif 1363 1364#ifdef HAVE_LTCHARS 1365static struct ltchars new_ltchars = {-1,-1,-1,-1,-1,-1}; 1366#endif 1367#ifdef HAVE_TCHARS 1368static struct tchars new_tchars = {-1,-1,-1,-1,-1,-1}; 1369#endif 1370 1371void 1372init_sys_modes () 1373{ 1374 struct emacs_tty tty; 1375 1376#ifdef VMS 1377#if 0 1378 static int oob_chars[2] = {0, 1 << 7}; /* catch C-g's */ 1379 extern int (*interrupt_signal) (); 1380#endif 1381#endif 1382 1383 Vtty_erase_char = Qnil; 1384 1385 if (noninteractive) 1386 return; 1387 1388#ifdef VMS 1389 if (!input_ef) 1390 input_ef = get_kbd_event_flag (); 1391 /* LIB$GET_EF (&input_ef); */ 1392 SYS$CLREF (input_ef); 1393 waiting_for_ast = 0; 1394 if (!timer_ef) 1395 timer_ef = get_timer_event_flag (); 1396 /* LIB$GET_EF (&timer_ef); */ 1397 SYS$CLREF (timer_ef); 1398#if 0 1399 if (!process_ef) 1400 { 1401 LIB$GET_EF (&process_ef); 1402 SYS$CLREF (process_ef); 1403 } 1404 if (input_ef / 32 != process_ef / 32) 1405 croak ("Input and process event flags in different clusters."); 1406#endif 1407 if (input_ef / 32 != timer_ef / 32) 1408 croak ("Input and timer event flags in different clusters."); 1409#if 0 1410 input_eflist = ((unsigned) 1 << (input_ef % 32)) | 1411 ((unsigned) 1 << (process_ef % 32)); 1412#endif 1413 timer_eflist = ((unsigned) 1 << (input_ef % 32)) | 1414 ((unsigned) 1 << (timer_ef % 32)); 1415#ifndef VMS4_4 1416 sys_access_reinit (); 1417#endif 1418#endif /* not VMS */ 1419 1420#ifdef BSD_PGRPS 1421 if (! read_socket_hook && EQ (Vwindow_system, Qnil)) 1422 narrow_foreground_group (); 1423#endif 1424 1425#ifdef HAVE_WINDOW_SYSTEM 1426 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore 1427 needs the initialization code below. */ 1428 if (!read_socket_hook && EQ (Vwindow_system, Qnil)) 1429#endif 1430 { 1431 EMACS_GET_TTY (input_fd, &old_tty); 1432 1433 old_tty_valid = 1; 1434 1435 tty = old_tty; 1436 1437#if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS) 1438 XSETINT (Vtty_erase_char, old_tty.main.c_cc[VERASE]); 1439 1440#ifdef DGUX 1441 /* This allows meta to be sent on 8th bit. */ 1442 tty.main.c_iflag &= ~INPCK; /* don't check input for parity */ 1443#endif 1444 tty.main.c_iflag |= (IGNBRK); /* Ignore break condition */ 1445 tty.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */ 1446#ifdef INLCR /* I'm just being cautious, 1447 since I can't check how widespread INLCR is--rms. */ 1448 tty.main.c_iflag &= ~INLCR; /* Disable map of NL to CR on input */ 1449#endif 1450#ifdef ISTRIP 1451 tty.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */ 1452#endif 1453 tty.main.c_lflag &= ~ECHO; /* Disable echo */ 1454 tty.main.c_lflag &= ~ICANON; /* Disable erase/kill processing */ 1455#ifdef IEXTEN 1456 tty.main.c_lflag &= ~IEXTEN; /* Disable other editing characters. */ 1457#endif 1458 tty.main.c_lflag |= ISIG; /* Enable signals */ 1459 if (flow_control) 1460 { 1461 tty.main.c_iflag |= IXON; /* Enable start/stop output control */ 1462#ifdef IXANY 1463 tty.main.c_iflag &= ~IXANY; 1464#endif /* IXANY */ 1465 } 1466 else 1467 tty.main.c_iflag &= ~IXON; /* Disable start/stop output control */ 1468 tty.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL 1469 on output */ 1470 tty.main.c_oflag &= ~TAB3; /* Disable tab expansion */ 1471#ifdef CS8 1472 if (meta_key) 1473 { 1474 tty.main.c_cflag |= CS8; /* allow 8th bit on input */ 1475 tty.main.c_cflag &= ~PARENB;/* Don't check parity */ 1476 } 1477#endif 1478 tty.main.c_cc[VINTR] = quit_char; /* C-g (usually) gives SIGINT */ 1479 /* Set up C-g for both SIGQUIT and SIGINT. 1480 We don't know which we will get, but we handle both alike 1481 so which one it really gives us does not matter. */ 1482 tty.main.c_cc[VQUIT] = quit_char; 1483 tty.main.c_cc[VMIN] = 1; /* Input should wait for at least 1 char */ 1484 tty.main.c_cc[VTIME] = 0; /* no matter how long that takes. */ 1485#ifdef VSWTCH 1486 tty.main.c_cc[VSWTCH] = CDISABLE; /* Turn off shell layering use 1487 of C-z */ 1488#endif /* VSWTCH */ 1489 1490#if defined (mips) || defined (HAVE_TCATTR) 1491#ifdef VSUSP 1492 tty.main.c_cc[VSUSP] = CDISABLE; /* Turn off mips handling of C-z. */ 1493#endif /* VSUSP */ 1494#ifdef V_DSUSP 1495 tty.main.c_cc[V_DSUSP] = CDISABLE; /* Turn off mips handling of C-y. */ 1496#endif /* V_DSUSP */ 1497#ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */ 1498 tty.main.c_cc[VDSUSP] = CDISABLE; 1499#endif /* VDSUSP */ 1500#ifdef VLNEXT 1501 tty.main.c_cc[VLNEXT] = CDISABLE; 1502#endif /* VLNEXT */ 1503#ifdef VREPRINT 1504 tty.main.c_cc[VREPRINT] = CDISABLE; 1505#endif /* VREPRINT */ 1506#ifdef VWERASE 1507 tty.main.c_cc[VWERASE] = CDISABLE; 1508#endif /* VWERASE */ 1509#ifdef VDISCARD 1510 tty.main.c_cc[VDISCARD] = CDISABLE; 1511#endif /* VDISCARD */ 1512 1513 if (flow_control) 1514 { 1515#ifdef VSTART 1516 tty.main.c_cc[VSTART] = '\021'; 1517#endif /* VSTART */ 1518#ifdef VSTOP 1519 tty.main.c_cc[VSTOP] = '\023'; 1520#endif /* VSTOP */ 1521 } 1522 else 1523 { 1524#ifdef VSTART 1525 tty.main.c_cc[VSTART] = CDISABLE; 1526#endif /* VSTART */ 1527#ifdef VSTOP 1528 tty.main.c_cc[VSTOP] = CDISABLE; 1529#endif /* VSTOP */ 1530 } 1531#endif /* mips or HAVE_TCATTR */ 1532 1533#ifdef SET_LINE_DISCIPLINE 1534 /* Need to explicitly request TERMIODISC line discipline or 1535 Ultrix's termios does not work correctly. */ 1536 tty.main.c_line = SET_LINE_DISCIPLINE; 1537#endif 1538#ifdef AIX 1539#ifndef IBMR2AIX 1540 /* AIX enhanced edit loses NULs, so disable it. */ 1541 tty.main.c_line = 0; 1542 tty.main.c_iflag &= ~ASCEDIT; 1543#else 1544 tty.main.c_cc[VSTRT] = CDISABLE; 1545 tty.main.c_cc[VSTOP] = CDISABLE; 1546 tty.main.c_cc[VSUSP] = CDISABLE; 1547 tty.main.c_cc[VDSUSP] = CDISABLE; 1548#endif /* IBMR2AIX */ 1549 if (flow_control) 1550 { 1551#ifdef VSTART 1552 tty.main.c_cc[VSTART] = '\021'; 1553#endif /* VSTART */ 1554#ifdef VSTOP 1555 tty.main.c_cc[VSTOP] = '\023'; 1556#endif /* VSTOP */ 1557 } 1558 /* Also, PTY overloads NUL and BREAK. 1559 don't ignore break, but don't signal either, so it looks like NUL. 1560 This really serves a purpose only if running in an XTERM window 1561 or via TELNET or the like, but does no harm elsewhere. */ 1562 tty.main.c_iflag &= ~IGNBRK; 1563 tty.main.c_iflag &= ~BRKINT; 1564#endif 1565#else /* if not HAVE_TERMIO */ 1566#ifdef VMS 1567 tty.main.tt_char |= TT$M_NOECHO; 1568 if (meta_key) 1569 tty.main.tt_char |= TT$M_EIGHTBIT; 1570 if (flow_control) 1571 tty.main.tt_char |= TT$M_TTSYNC; 1572 else 1573 tty.main.tt_char &= ~TT$M_TTSYNC; 1574 tty.main.tt2_char |= TT2$M_PASTHRU | TT2$M_XON; 1575#else /* not VMS (BSD, that is) */ 1576#ifndef DOS_NT 1577 XSETINT (Vtty_erase_char, tty.main.sg_erase); 1578 tty.main.sg_flags &= ~(ECHO | CRMOD | XTABS); 1579 if (meta_key) 1580 tty.main.sg_flags |= ANYP; 1581 tty.main.sg_flags |= interrupt_input ? RAW : CBREAK; 1582#endif /* not DOS_NT */ 1583#endif /* not VMS (BSD, that is) */ 1584#endif /* not HAVE_TERMIO */ 1585 1586 /* If going to use CBREAK mode, we must request C-g to interrupt 1587 and turn off start and stop chars, etc. If not going to use 1588 CBREAK mode, do this anyway so as to turn off local flow 1589 control for user coming over network on 4.2; in this case, 1590 only t_stopc and t_startc really matter. */ 1591#ifndef HAVE_TERMIO 1592#ifdef HAVE_TCHARS 1593 /* Note: if not using CBREAK mode, it makes no difference how we 1594 set this */ 1595 tty.tchars = new_tchars; 1596 tty.tchars.t_intrc = quit_char; 1597 if (flow_control) 1598 { 1599 tty.tchars.t_startc = '\021'; 1600 tty.tchars.t_stopc = '\023'; 1601 } 1602 1603 tty.lmode = LDECCTQ | LLITOUT | LPASS8 | LNOFLSH | old_tty.lmode; 1604#ifdef ultrix 1605 /* Under Ultrix 4.2a, leaving this out doesn't seem to hurt 1606 anything, and leaving it in breaks the meta key. Go figure. */ 1607 tty.lmode &= ~LLITOUT; 1608#endif 1609 1610#ifdef BSD4_1 1611 lmode = tty.lmode; 1612#endif 1613 1614#endif /* HAVE_TCHARS */ 1615#endif /* not HAVE_TERMIO */ 1616 1617#ifdef HAVE_LTCHARS 1618 tty.ltchars = new_ltchars; 1619#endif /* HAVE_LTCHARS */ 1620#ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */ 1621 if (!term_initted) 1622 internal_terminal_init (); 1623 dos_ttraw (); 1624#endif 1625 1626 EMACS_SET_TTY (input_fd, &tty, 0); 1627 1628 /* This code added to insure that, if flow-control is not to be used, 1629 we have an unlocked terminal at the start. */ 1630 1631#ifdef TCXONC 1632 if (!flow_control) ioctl (input_fd, TCXONC, 1); 1633#endif 1634#ifndef APOLLO 1635#ifdef TIOCSTART 1636 if (!flow_control) ioctl (input_fd, TIOCSTART, 0); 1637#endif 1638#endif 1639 1640#if defined (HAVE_TERMIOS) || defined (HPUX9) 1641#ifdef TCOON 1642 if (!flow_control) tcflow (input_fd, TCOON); 1643#endif 1644#endif 1645 1646#ifdef AIXHFT 1647 hft_init (); 1648#ifdef IBMR2AIX 1649 { 1650 /* IBM's HFT device usually thinks a ^J should be LF/CR. We need it 1651 to be only LF. This is the way that is done. */ 1652 struct termio tty; 1653 1654 if (ioctl (1, HFTGETID, &tty) != -1) 1655 write (1, "\033[20l", 5); 1656 } 1657#endif 1658#endif /* AIXHFT */ 1659 1660#ifdef VMS 1661/* Appears to do nothing when in PASTHRU mode. 1662 SYS$QIOW (0, input_fd, IO$_SETMODE|IO$M_OUTBAND, 0, 0, 0, 1663 interrupt_signal, oob_chars, 0, 0, 0, 0); 1664*/ 1665 queue_kbd_input (0); 1666#endif /* VMS */ 1667 } 1668 1669#ifdef F_SETFL 1670#ifndef F_SETOWN_BUG 1671#ifdef F_GETOWN /* F_SETFL does not imply existence of F_GETOWN */ 1672 if (interrupt_input 1673 && ! read_socket_hook && EQ (Vwindow_system, Qnil)) 1674 { 1675 old_fcntl_owner = fcntl (input_fd, F_GETOWN, 0); 1676 fcntl (input_fd, F_SETOWN, getpid ()); 1677 init_sigio (input_fd); 1678 } 1679#endif /* F_GETOWN */ 1680#endif /* F_SETOWN_BUG */ 1681#endif /* F_SETFL */ 1682 1683#ifdef BSD4_1 1684 if (interrupt_input) 1685 init_sigio (input_fd); 1686#endif 1687 1688#ifdef VMS /* VMS sometimes has this symbol but lacks setvbuf. */ 1689#undef _IOFBF 1690#endif 1691#ifdef _IOFBF 1692 /* This symbol is defined on recent USG systems. 1693 Someone says without this call USG won't really buffer the file 1694 even with a call to setbuf. */ 1695 setvbuf (stdout, (char *) _sobuf, _IOFBF, sizeof _sobuf); 1696#else 1697 setbuf (stdout, (char *) _sobuf); 1698#endif 1699#ifdef HAVE_WINDOW_SYSTEM 1700 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore 1701 needs the initialization code below. */ 1702 if (EQ (Vwindow_system, Qnil) 1703#ifndef WINDOWSNT 1704 /* When running in tty mode on NT/Win95, we have a read_socket 1705 hook, but still need the rest of the initialization code below. */ 1706 && (! read_socket_hook) 1707#endif 1708 ) 1709#endif 1710 set_terminal_modes (); 1711 1712 if (!term_initted 1713 && FRAMEP (Vterminal_frame) 1714 && FRAME_TERMCAP_P (XFRAME (Vterminal_frame))) 1715 init_frame_faces (XFRAME (Vterminal_frame)); 1716 1717 if (term_initted && no_redraw_on_reenter) 1718 { 1719 if (display_completed) 1720 direct_output_forward_char (0); 1721 } 1722 else 1723 { 1724 frame_garbaged = 1; 1725 if (FRAMEP (Vterminal_frame)) 1726 FRAME_GARBAGED_P (XFRAME (Vterminal_frame)) = 1; 1727 } 1728 1729 term_initted = 1; 1730} 1731 1732/* Return nonzero if safe to use tabs in output. 1733 At the time this is called, init_sys_modes has not been done yet. */ 1734 1735int 1736tabs_safe_p () 1737{ 1738 struct emacs_tty tty; 1739 1740 EMACS_GET_TTY (input_fd, &tty); 1741 return EMACS_TTY_TABS_OK (&tty); 1742} 1743 1744/* Get terminal size from system. 1745 Store number of lines into *HEIGHTP and width into *WIDTHP. 1746 We store 0 if there's no valid information. */ 1747 1748void 1749get_frame_size (widthp, heightp) 1750 int *widthp, *heightp; 1751{ 1752 1753#ifdef TIOCGWINSZ 1754 1755 /* BSD-style. */ 1756 struct winsize size; 1757 1758 if (ioctl (input_fd, TIOCGWINSZ, &size) == -1) 1759 *widthp = *heightp = 0; 1760 else 1761 { 1762 *widthp = size.ws_col; 1763 *heightp = size.ws_row; 1764 } 1765 1766#else 1767#ifdef TIOCGSIZE 1768 1769 /* SunOS - style. */ 1770 struct ttysize size; 1771 1772 if (ioctl (input_fd, TIOCGSIZE, &size) == -1) 1773 *widthp = *heightp = 0; 1774 else 1775 { 1776 *widthp = size.ts_cols; 1777 *heightp = size.ts_lines; 1778 } 1779 1780#else 1781#ifdef VMS 1782 1783 /* Use a fresh channel since the current one may have stale info 1784 (for example, from prior to a suspend); and to avoid a dependency 1785 in the init sequence. */ 1786 int chan; 1787 struct sensemode tty; 1788 1789 SYS$ASSIGN (&input_dsc, &chan, 0, 0); 1790 SYS$QIOW (0, chan, IO$_SENSEMODE, &tty, 0, 0, 1791 &tty.class, 12, 0, 0, 0, 0); 1792 SYS$DASSGN (chan); 1793 *widthp = tty.scr_wid; 1794 *heightp = tty.scr_len; 1795 1796#else 1797#ifdef MSDOS 1798 *widthp = ScreenCols (); 1799 *heightp = ScreenRows (); 1800#else /* system doesn't know size */ 1801 *widthp = 0; 1802 *heightp = 0; 1803#endif 1804 1805#endif /* not VMS */ 1806#endif /* not SunOS-style */ 1807#endif /* not BSD-style */ 1808} 1809 1810/* Set the logical window size associated with descriptor FD 1811 to HEIGHT and WIDTH. This is used mainly with ptys. */ 1812 1813int 1814set_window_size (fd, height, width) 1815 int fd, height, width; 1816{ 1817#ifdef TIOCSWINSZ 1818 1819 /* BSD-style. */ 1820 struct winsize size; 1821 size.ws_row = height; 1822 size.ws_col = width; 1823 1824 if (ioctl (fd, TIOCSWINSZ, &size) == -1) 1825 return 0; /* error */ 1826 else 1827 return 1; 1828 1829#else 1830#ifdef TIOCSSIZE 1831 1832 /* SunOS - style. */ 1833 struct ttysize size; 1834 size.ts_lines = height; 1835 size.ts_cols = width; 1836 1837 if (ioctl (fd, TIOCGSIZE, &size) == -1) 1838 return 0; 1839 else 1840 return 1; 1841#else 1842 return -1; 1843#endif /* not SunOS-style */ 1844#endif /* not BSD-style */ 1845} 1846 1847 1848/* Prepare the terminal for exiting Emacs; move the cursor to the 1849 bottom of the frame, turn off interrupt-driven I/O, etc. */ 1850void 1851reset_sys_modes () 1852{ 1853 struct frame *sf; 1854 1855 if (noninteractive) 1856 { 1857 fflush (stdout); 1858 return; 1859 } 1860 if (!term_initted) 1861 return; 1862#ifdef HAVE_WINDOW_SYSTEM 1863 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore 1864 needs the clean-up code below. */ 1865 if (!EQ (Vwindow_system, Qnil) 1866#ifndef WINDOWSNT 1867 /* When running in tty mode on NT/Win95, we have a read_socket 1868 hook, but still need the rest of the clean-up code below. */ 1869 || read_socket_hook 1870#endif 1871 ) 1872 return; 1873#endif 1874 sf = SELECTED_FRAME (); 1875 cursor_to (FRAME_LINES (sf) - 1, 0); 1876 clear_end_of_line (FRAME_COLS (sf)); 1877 /* clear_end_of_line may move the cursor */ 1878 cursor_to (FRAME_LINES (sf) - 1, 0); 1879#if defined (IBMR2AIX) && defined (AIXHFT) 1880 { 1881 /* HFT devices normally use ^J as a LF/CR. We forced it to 1882 do the LF only. Now, we need to reset it. */ 1883 struct termio tty; 1884 1885 if (ioctl (1, HFTGETID, &tty) != -1) 1886 write (1, "\033[20h", 5); 1887 } 1888#endif 1889 1890 reset_terminal_modes (); 1891 fflush (stdout); 1892#ifdef BSD_SYSTEM 1893#ifndef BSD4_1 1894 /* Avoid possible loss of output when changing terminal modes. */ 1895 fsync (fileno (stdout)); 1896#endif 1897#endif 1898 1899#ifdef F_SETFL 1900#ifndef F_SETOWN_BUG 1901#ifdef F_SETOWN /* F_SETFL does not imply existence of F_SETOWN */ 1902 if (interrupt_input) 1903 { 1904 reset_sigio (); 1905 fcntl (input_fd, F_SETOWN, old_fcntl_owner); 1906 } 1907#endif /* F_SETOWN */ 1908#endif /* F_SETOWN_BUG */ 1909#ifdef O_NDELAY 1910 fcntl (input_fd, F_SETFL, fcntl (input_fd, F_GETFL, 0) & ~O_NDELAY); 1911#endif 1912#endif /* F_SETFL */ 1913#ifdef BSD4_1 1914 if (interrupt_input) 1915 reset_sigio (); 1916#endif /* BSD4_1 */ 1917 1918 if (old_tty_valid) 1919 while (EMACS_SET_TTY (input_fd, &old_tty, 0) < 0 && errno == EINTR) 1920 ; 1921 1922#ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */ 1923 dos_ttcooked (); 1924#endif 1925 1926#ifdef SET_LINE_DISCIPLINE 1927 /* Ultrix's termios *ignores* any line discipline except TERMIODISC. 1928 A different old line discipline is therefore not restored, yet. 1929 Restore the old line discipline by hand. */ 1930 ioctl (0, TIOCSETD, &old_tty.main.c_line); 1931#endif 1932 1933#ifdef AIXHFT 1934 hft_reset (); 1935#endif 1936 1937#ifdef BSD_PGRPS 1938 widen_foreground_group (); 1939#endif 1940} 1941 1942#ifdef HAVE_PTYS 1943 1944/* Set up the proper status flags for use of a pty. */ 1945 1946void 1947setup_pty (fd) 1948 int fd; 1949{ 1950 /* I'm told that TOICREMOTE does not mean control chars 1951 "can't be sent" but rather that they don't have 1952 input-editing or signaling effects. 1953 That should be good, because we have other ways 1954 to do those things in Emacs. 1955 However, telnet mode seems not to work on 4.2. 1956 So TIOCREMOTE is turned off now. */ 1957 1958 /* Under hp-ux, if TIOCREMOTE is turned on, some calls 1959 will hang. In particular, the "timeout" feature (which 1960 causes a read to return if there is no data available) 1961 does this. Also it is known that telnet mode will hang 1962 in such a way that Emacs must be stopped (perhaps this 1963 is the same problem). 1964 1965 If TIOCREMOTE is turned off, then there is a bug in 1966 hp-ux which sometimes loses data. Apparently the 1967 code which blocks the master process when the internal 1968 buffer fills up does not work. Other than this, 1969 though, everything else seems to work fine. 1970 1971 Since the latter lossage is more benign, we may as well 1972 lose that way. -- cph */ 1973#ifdef FIONBIO 1974#if defined(SYSV_PTYS) || defined(UNIX98_PTYS) 1975 { 1976 int on = 1; 1977 ioctl (fd, FIONBIO, &on); 1978 } 1979#endif 1980#endif 1981#ifdef IBMRTAIX 1982 /* On AIX, the parent gets SIGHUP when a pty attached child dies. So, we */ 1983 /* ignore SIGHUP once we've started a child on a pty. Note that this may */ 1984 /* cause EMACS not to die when it should, i.e., when its own controlling */ 1985 /* tty goes away. I've complained to the AIX developers, and they may */ 1986 /* change this behavior, but I'm not going to hold my breath. */ 1987 signal (SIGHUP, SIG_IGN); 1988#endif 1989} 1990#endif /* HAVE_PTYS */ 1991 1992#ifdef VMS 1993 1994/* Assigning an input channel is done at the start of Emacs execution. 1995 This is called each time Emacs is resumed, also, but does nothing 1996 because input_chain is no longer zero. */ 1997 1998void 1999init_vms_input () 2000{ 2001 int status; 2002 2003 if (input_fd == 0) 2004 { 2005 status = SYS$ASSIGN (&input_dsc, &input_fd, 0, 0); 2006 if (! (status & 1)) 2007 LIB$STOP (status); 2008 } 2009} 2010 2011/* Deassigning the input channel is done before exiting. */ 2012 2013void 2014stop_vms_input () 2015{ 2016 return SYS$DASSGN (input_fd); 2017} 2018 2019short input_buffer; 2020 2021/* Request reading one character into the keyboard buffer. 2022 This is done as soon as the buffer becomes empty. */ 2023 2024void 2025queue_kbd_input () 2026{ 2027 int status; 2028 extern kbd_input_ast (); 2029 2030 waiting_for_ast = 0; 2031 stop_input = 0; 2032 status = SYS$QIO (0, input_fd, IO$_READVBLK, 2033 &input_iosb, kbd_input_ast, 1, 2034 &input_buffer, 1, 0, terminator_mask, 0, 0); 2035} 2036 2037int input_count; 2038 2039/* Ast routine that is called when keyboard input comes in 2040 in accord with the SYS$QIO above. */ 2041 2042void 2043kbd_input_ast () 2044{ 2045 register int c = -1; 2046 int old_errno = errno; 2047 extern EMACS_TIME *input_available_clear_time; 2048 2049 if (waiting_for_ast) 2050 SYS$SETEF (input_ef); 2051 waiting_for_ast = 0; 2052 input_count++; 2053#ifdef ASTDEBUG 2054 if (input_count == 25) 2055 exit (1); 2056 printf ("Ast # %d,", input_count); 2057 printf (" iosb = %x, %x, %x, %x", 2058 input_iosb.offset, input_iosb.status, input_iosb.termlen, 2059 input_iosb.term); 2060#endif 2061 if (input_iosb.offset) 2062 { 2063 c = input_buffer; 2064#ifdef ASTDEBUG 2065 printf (", char = 0%o", c); 2066#endif 2067 } 2068#ifdef ASTDEBUG 2069 printf ("\n"); 2070 fflush (stdout); 2071 sleep (1); 2072#endif 2073 if (! stop_input) 2074 queue_kbd_input (); 2075 if (c >= 0) 2076 { 2077 struct input_event e; 2078 EVENT_INIT (e); 2079 2080 e.kind = ASCII_KEYSTROKE_EVENT; 2081 XSETINT (e.code, c); 2082 e.frame_or_window = selected_frame; 2083 kbd_buffer_store_event (&e); 2084 } 2085 if (input_available_clear_time) 2086 EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0); 2087 errno = old_errno; 2088} 2089 2090/* Wait until there is something in kbd_buffer. */ 2091 2092void 2093wait_for_kbd_input () 2094{ 2095 extern int have_process_input, process_exited; 2096 2097 /* If already something, avoid doing system calls. */ 2098 if (detect_input_pending ()) 2099 { 2100 return; 2101 } 2102 /* Clear a flag, and tell ast routine above to set it. */ 2103 SYS$CLREF (input_ef); 2104 waiting_for_ast = 1; 2105 /* Check for timing error: ast happened while we were doing that. */ 2106 if (!detect_input_pending ()) 2107 { 2108 /* No timing error: wait for flag to be set. */ 2109 set_waiting_for_input (0); 2110 SYS$WFLOR (input_ef, input_eflist); 2111 clear_waiting_for_input (); 2112 if (!detect_input_pending ()) 2113 /* Check for subprocess input availability */ 2114 { 2115 int dsp = have_process_input || process_exited; 2116 2117 SYS$CLREF (process_ef); 2118 if (have_process_input) 2119 process_command_input (); 2120 if (process_exited) 2121 process_exit (); 2122 if (dsp) 2123 { 2124 update_mode_lines++; 2125 prepare_menu_bars (); 2126 redisplay_preserve_echo_area (18); 2127 } 2128 } 2129 } 2130 waiting_for_ast = 0; 2131} 2132 2133/* Get rid of any pending QIO, when we are about to suspend 2134 or when we want to throw away pending input. 2135 We wait for a positive sign that the AST routine has run 2136 and therefore there is no I/O request queued when we return. 2137 SYS$SETAST is used to avoid a timing error. */ 2138 2139void 2140end_kbd_input () 2141{ 2142#ifdef ASTDEBUG 2143 printf ("At end_kbd_input.\n"); 2144 fflush (stdout); 2145 sleep (1); 2146#endif 2147 if (LIB$AST_IN_PROG ()) /* Don't wait if suspending from kbd_buffer_store_event! */ 2148 { 2149 SYS$CANCEL (input_fd); 2150 return; 2151 } 2152 2153 SYS$SETAST (0); 2154 /* Clear a flag, and tell ast routine above to set it. */ 2155 SYS$CLREF (input_ef); 2156 waiting_for_ast = 1; 2157 stop_input = 1; 2158 SYS$CANCEL (input_fd); 2159 SYS$SETAST (1); 2160 SYS$WAITFR (input_ef); 2161 waiting_for_ast = 0; 2162} 2163 2164/* Wait for either input available or time interval expiry. */ 2165 2166void 2167input_wait_timeout (timeval) 2168 int timeval; /* Time to wait, in seconds */ 2169{ 2170 int time [2]; 2171 static int zero = 0; 2172 static int large = -10000000; 2173 2174 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */ 2175 2176 /* If already something, avoid doing system calls. */ 2177 if (detect_input_pending ()) 2178 { 2179 return; 2180 } 2181 /* Clear a flag, and tell ast routine above to set it. */ 2182 SYS$CLREF (input_ef); 2183 waiting_for_ast = 1; 2184 /* Check for timing error: ast happened while we were doing that. */ 2185 if (!detect_input_pending ()) 2186 { 2187 /* No timing error: wait for flag to be set. */ 2188 SYS$CANTIM (1, 0); 2189 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */ 2190 SYS$WFLOR (timer_ef, timer_eflist); /* Wait for timer expiry or input */ 2191 } 2192 waiting_for_ast = 0; 2193} 2194 2195/* The standard `sleep' routine works some other way 2196 and it stops working if you have ever quit out of it. 2197 This one continues to work. */ 2198 2199sys_sleep (timeval) 2200 int timeval; 2201{ 2202 int time [2]; 2203 static int zero = 0; 2204 static int large = -10000000; 2205 2206 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */ 2207 2208 SYS$CANTIM (1, 0); 2209 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */ 2210 SYS$WAITFR (timer_ef); /* Wait for timer expiry only */ 2211} 2212 2213void 2214init_sigio (fd) 2215 int fd; 2216{ 2217 request_sigio (); 2218} 2219 2220reset_sigio () 2221{ 2222 unrequest_sigio (); 2223} 2224 2225void 2226request_sigio () 2227{ 2228 if (noninteractive) 2229 return; 2230 croak ("request sigio"); 2231} 2232 2233void 2234unrequest_sigio () 2235{ 2236 if (noninteractive) 2237 return; 2238 croak ("unrequest sigio"); 2239} 2240 2241#endif /* VMS */ 2242 2243/* Note that VMS compiler won't accept defined (CANNOT_DUMP). */ 2244#ifndef CANNOT_DUMP 2245#define NEED_STARTS 2246#endif 2247 2248#ifndef SYSTEM_MALLOC 2249#ifndef NEED_STARTS 2250#define NEED_STARTS 2251#endif 2252#endif 2253 2254#ifdef NEED_STARTS 2255/* Some systems that cannot dump also cannot implement these. */ 2256 2257/* 2258 * Return the address of the start of the text segment prior to 2259 * doing an unexec. After unexec the return value is undefined. 2260 * See crt0.c for further explanation and _start. 2261 * 2262 */ 2263 2264#if !(defined (__NetBSD__) && defined (__ELF__)) 2265#ifndef HAVE_TEXT_START 2266char * 2267start_of_text () 2268{ 2269#ifdef TEXT_START 2270 return ((char *) TEXT_START); 2271#else 2272#ifdef GOULD 2273 extern csrt (); 2274 return ((char *) csrt); 2275#else /* not GOULD */ 2276 extern int _start (); 2277 return ((char *) _start); 2278#endif /* GOULD */ 2279#endif /* TEXT_START */ 2280} 2281#endif /* not HAVE_TEXT_START */ 2282#endif 2283 2284/* 2285 * Return the address of the start of the data segment prior to 2286 * doing an unexec. After unexec the return value is undefined. 2287 * See crt0.c for further information and definition of data_start. 2288 * 2289 * Apparently, on BSD systems this is etext at startup. On 2290 * USG systems (swapping) this is highly mmu dependent and 2291 * is also dependent on whether or not the program is running 2292 * with shared text. Generally there is a (possibly large) 2293 * gap between end of text and start of data with shared text. 2294 * 2295 * On Uniplus+ systems with shared text, data starts at a 2296 * fixed address. Each port (from a given oem) is generally 2297 * different, and the specific value of the start of data can 2298 * be obtained via the UniPlus+ specific "uvar" system call, 2299 * however the method outlined in crt0.c seems to be more portable. 2300 * 2301 * Probably what will have to happen when a USG unexec is available, 2302 * at least on UniPlus, is temacs will have to be made unshared so 2303 * that text and data are contiguous. Then once loadup is complete, 2304 * unexec will produce a shared executable where the data can be 2305 * at the normal shared text boundary and the startofdata variable 2306 * will be patched by unexec to the correct value. 2307 * 2308 */ 2309 2310#ifndef start_of_data 2311char * 2312start_of_data () 2313{ 2314#ifdef DATA_START 2315 return ((char *) DATA_START); 2316#else 2317#ifdef ORDINARY_LINK 2318 /* 2319 * This is a hack. Since we're not linking crt0.c or pre_crt0.c, 2320 * data_start isn't defined. We take the address of environ, which 2321 * is known to live at or near the start of the system crt0.c, and 2322 * we don't sweat the handful of bytes that might lose. 2323 */ 2324 extern char **environ; 2325 2326 return ((char *) &environ); 2327#else 2328 extern int data_start; 2329 return ((char *) &data_start); 2330#endif /* ORDINARY_LINK */ 2331#endif /* DATA_START */ 2332} 2333#endif /* start_of_data */ 2334#endif /* NEED_STARTS (not CANNOT_DUMP or not SYSTEM_MALLOC) */ 2335 2336/* init_system_name sets up the string for the Lisp function 2337 system-name to return. */ 2338 2339#ifdef BSD4_1 2340#include <whoami.h> 2341#endif 2342 2343extern Lisp_Object Vsystem_name; 2344 2345#ifndef BSD4_1 2346#ifndef VMS 2347#ifdef HAVE_SOCKETS 2348#include <sys/socket.h> 2349#include <netdb.h> 2350#endif /* HAVE_SOCKETS */ 2351#endif /* not VMS */ 2352#endif /* not BSD4_1 */ 2353 2354#ifdef TRY_AGAIN 2355#ifndef HAVE_H_ERRNO 2356extern int h_errno; 2357#endif 2358#endif /* TRY_AGAIN */ 2359 2360void 2361init_system_name () 2362{ 2363#ifdef BSD4_1 2364 Vsystem_name = build_string (sysname); 2365#else 2366#ifdef VMS 2367 char *sp, *end; 2368 if ((sp = egetenv ("SYS$NODE")) == 0) 2369 Vsystem_name = build_string ("vax-vms"); 2370 else if ((end = index (sp, ':')) == 0) 2371 Vsystem_name = build_string (sp); 2372 else 2373 Vsystem_name = make_string (sp, end - sp); 2374#else 2375#ifndef HAVE_GETHOSTNAME 2376 struct utsname uts; 2377 uname (&uts); 2378 Vsystem_name = build_string (uts.nodename); 2379#else /* HAVE_GETHOSTNAME */ 2380 unsigned int hostname_size = 256; 2381 char *hostname = (char *) alloca (hostname_size); 2382 2383 /* Try to get the host name; if the buffer is too short, try 2384 again. Apparently, the only indication gethostname gives of 2385 whether the buffer was large enough is the presence or absence 2386 of a '\0' in the string. Eech. */ 2387 for (;;) 2388 { 2389 gethostname (hostname, hostname_size - 1); 2390 hostname[hostname_size - 1] = '\0'; 2391 2392 /* Was the buffer large enough for the '\0'? */ 2393 if (strlen (hostname) < hostname_size - 1) 2394 break; 2395 2396 hostname_size <<= 1; 2397 hostname = (char *) alloca (hostname_size); 2398 } 2399#ifdef HAVE_SOCKETS 2400 /* Turn the hostname into the official, fully-qualified hostname. 2401 Don't do this if we're going to dump; this can confuse system 2402 libraries on some machines and make the dumped emacs core dump. */ 2403#ifndef CANNOT_DUMP 2404 if (initialized) 2405#endif /* not CANNOT_DUMP */ 2406 if (! index (hostname, '.')) 2407 { 2408 struct hostent *hp; 2409 int count; 2410 for (count = 0;; count++) 2411 { 2412#ifdef TRY_AGAIN 2413 h_errno = 0; 2414#endif 2415 hp = gethostbyname (hostname); 2416#ifdef TRY_AGAIN 2417 if (! (hp == 0 && h_errno == TRY_AGAIN)) 2418#endif 2419 break; 2420 if (count >= 5) 2421 break; 2422 Fsleep_for (make_number (1), Qnil); 2423 } 2424 if (hp) 2425 { 2426 char *fqdn = (char *) hp->h_name; 2427#if 0 2428 char *p; 2429#endif 2430 2431 if (!index (fqdn, '.')) 2432 { 2433 /* We still don't have a fully qualified domain name. 2434 Try to find one in the list of alternate names */ 2435 char **alias = hp->h_aliases; 2436 while (*alias 2437 && (!index (*alias, '.') 2438 || !strcmp (*alias, "localhost.localdomain"))) 2439 alias++; 2440 if (*alias) 2441 fqdn = *alias; 2442 } 2443 hostname = fqdn; 2444#if 0 2445 /* Convert the host name to lower case. */ 2446 /* Using ctype.h here would introduce a possible locale 2447 dependence that is probably wrong for hostnames. */ 2448 p = hostname; 2449 while (*p) 2450 { 2451 if (*p >= 'A' && *p <= 'Z') 2452 *p += 'a' - 'A'; 2453 p++; 2454 } 2455#endif 2456 } 2457 } 2458#endif /* HAVE_SOCKETS */ 2459 /* We used to try using getdomainname here, 2460 but NIIBE Yutaka <gniibe@etl.go.jp> says that 2461 getdomainname gets the NIS/YP domain which often is not the same 2462 as in Internet domain name. */ 2463#if 0 /* Turned off because sysinfo is not really likely to return the 2464 correct Internet domain. */ 2465#if (HAVE_SYSINFO && defined (SI_SRPC_DOMAIN)) 2466 if (! index (hostname, '.')) 2467 { 2468 /* The hostname is not fully qualified. Append the domain name. */ 2469 2470 int hostlen = strlen (hostname); 2471 int domain_size = 256; 2472 2473 for (;;) 2474 { 2475 char *domain = (char *) alloca (domain_size + 1); 2476 char *fqdn = (char *) alloca (hostlen + 1 + domain_size + 1); 2477 int sys_domain_size = sysinfo (SI_SRPC_DOMAIN, domain, domain_size); 2478 if (sys_domain_size <= 0) 2479 break; 2480 if (domain_size < sys_domain_size) 2481 { 2482 domain_size = sys_domain_size; 2483 continue; 2484 } 2485 strcpy (fqdn, hostname); 2486 if (domain[0] == '.') 2487 strcpy (fqdn + hostlen, domain); 2488 else if (domain[0] != 0) 2489 { 2490 fqdn[hostlen] = '.'; 2491 strcpy (fqdn + hostlen + 1, domain); 2492 } 2493 hostname = fqdn; 2494 break; 2495 } 2496 } 2497#endif /* HAVE_SYSINFO && defined (SI_SRPC_DOMAIN) */ 2498#endif /* 0 */ 2499 Vsystem_name = build_string (hostname); 2500#endif /* HAVE_GETHOSTNAME */ 2501#endif /* VMS */ 2502#endif /* BSD4_1 */ 2503 { 2504 unsigned char *p; 2505 for (p = SDATA (Vsystem_name); *p; p++) 2506 if (*p == ' ' || *p == '\t') 2507 *p = '-'; 2508 } 2509} 2510 2511#ifndef MSDOS 2512#ifndef VMS 2513#if !defined (HAVE_SELECT) || defined (BROKEN_SELECT_NON_X) 2514 2515#include "sysselect.h" 2516#undef select 2517 2518#if defined (HAVE_X_WINDOWS) && !defined (HAVE_SELECT) 2519/* Cause explanatory error message at compile time, 2520 since the select emulation is not good enough for X. */ 2521int *x = &x_windows_lose_if_no_select_system_call; 2522#endif 2523 2524/* Emulate as much as select as is possible under 4.1 and needed by Gnu Emacs 2525 * Only checks read descriptors. 2526 */ 2527/* How long to wait between checking fds in select */ 2528#define SELECT_PAUSE 1 2529int select_alarmed; 2530 2531/* For longjmp'ing back to read_input_waiting. */ 2532 2533jmp_buf read_alarm_throw; 2534 2535/* Nonzero if the alarm signal should throw back to read_input_waiting. 2536 The read_socket_hook function sets this to 1 while it is waiting. */ 2537 2538int read_alarm_should_throw; 2539 2540SIGTYPE 2541select_alarm () 2542{ 2543 select_alarmed = 1; 2544#ifdef BSD4_1 2545 sigrelse (SIGALRM); 2546#else /* not BSD4_1 */ 2547 signal (SIGALRM, SIG_IGN); 2548#endif /* not BSD4_1 */ 2549 SIGNAL_THREAD_CHECK (SIGALRM); 2550 if (read_alarm_should_throw) 2551 longjmp (read_alarm_throw, 1); 2552} 2553 2554#ifndef WINDOWSNT 2555/* Only rfds are checked. */ 2556int 2557sys_select (nfds, rfds, wfds, efds, timeout) 2558 int nfds; 2559 SELECT_TYPE *rfds, *wfds, *efds; 2560 EMACS_TIME *timeout; 2561{ 2562 int ravail = 0; 2563 SELECT_TYPE orfds; 2564 int timeoutval; 2565 int *local_timeout; 2566 extern int proc_buffered_char[]; 2567#ifndef subprocesses 2568 int process_tick = 0, update_tick = 0; 2569#else 2570 extern int process_tick, update_tick; 2571#endif 2572 unsigned char buf; 2573 2574#if defined (HAVE_SELECT) && defined (HAVE_X_WINDOWS) 2575 /* If we're using X, then the native select will work; we only need the 2576 emulation for non-X usage. */ 2577 if (!NILP (Vwindow_system)) 2578 return select (nfds, rfds, wfds, efds, timeout); 2579#endif 2580 timeoutval = timeout ? EMACS_SECS (*timeout) : 100000; 2581 local_timeout = &timeoutval; 2582 FD_ZERO (&orfds); 2583 if (rfds) 2584 { 2585 orfds = *rfds; 2586 FD_ZERO (rfds); 2587 } 2588 if (wfds) 2589 FD_ZERO (wfds); 2590 if (efds) 2591 FD_ZERO (efds); 2592 2593 /* If we are looking only for the terminal, with no timeout, 2594 just read it and wait -- that's more efficient. */ 2595 if (*local_timeout == 100000 && process_tick == update_tick 2596 && FD_ISSET (0, &orfds)) 2597 { 2598 int fd; 2599 for (fd = 1; fd < nfds; ++fd) 2600 if (FD_ISSET (fd, &orfds)) 2601 goto hardway; 2602 if (! detect_input_pending ()) 2603 read_input_waiting (); 2604 FD_SET (0, rfds); 2605 return 1; 2606 } 2607 2608 hardway: 2609 /* Once a second, till the timer expires, check all the flagged read 2610 * descriptors to see if any input is available. If there is some then 2611 * set the corresponding bit in the return copy of rfds. 2612 */ 2613 while (1) 2614 { 2615 register int to_check, fd; 2616 2617 if (rfds) 2618 { 2619 for (to_check = nfds, fd = 0; --to_check >= 0; fd++) 2620 { 2621 if (FD_ISSET (fd, &orfds)) 2622 { 2623 int avail = 0, status = 0; 2624 2625 if (fd == 0) 2626 avail = detect_input_pending (); /* Special keyboard handler */ 2627 else 2628 { 2629#ifdef FIONREAD 2630 status = ioctl (fd, FIONREAD, &avail); 2631#else /* no FIONREAD */ 2632 /* Hoping it will return -1 if nothing available 2633 or 0 if all 0 chars requested are read. */ 2634 if (proc_buffered_char[fd] >= 0) 2635 avail = 1; 2636 else 2637 { 2638 avail = read (fd, &buf, 1); 2639 if (avail > 0) 2640 proc_buffered_char[fd] = buf; 2641 } 2642#endif /* no FIONREAD */ 2643 } 2644 if (status >= 0 && avail > 0) 2645 { 2646 FD_SET (fd, rfds); 2647 ravail++; 2648 } 2649 } 2650 } 2651 } 2652 if (*local_timeout == 0 || ravail != 0 || process_tick != update_tick) 2653 break; 2654 2655 turn_on_atimers (0); 2656 signal (SIGALRM, select_alarm); 2657 select_alarmed = 0; 2658 alarm (SELECT_PAUSE); 2659 2660 /* Wait for a SIGALRM (or maybe a SIGTINT) */ 2661 while (select_alarmed == 0 && *local_timeout != 0 2662 && process_tick == update_tick) 2663 { 2664 /* If we are interested in terminal input, 2665 wait by reading the terminal. 2666 That makes instant wakeup for terminal input at least. */ 2667 if (FD_ISSET (0, &orfds)) 2668 { 2669 read_input_waiting (); 2670 if (detect_input_pending ()) 2671 select_alarmed = 1; 2672 } 2673 else 2674 pause (); 2675 } 2676 (*local_timeout) -= SELECT_PAUSE; 2677 2678 /* Reset the old alarm if there was one. */ 2679 turn_on_atimers (1); 2680 2681 if (*local_timeout == 0) /* Stop on timer being cleared */ 2682 break; 2683 } 2684 return ravail; 2685} 2686#endif /* not WINDOWSNT */ 2687 2688/* Read keyboard input into the standard buffer, 2689 waiting for at least one character. */ 2690 2691void 2692read_input_waiting () 2693{ 2694 int nread, i; 2695 extern int quit_char; 2696 2697 if (read_socket_hook) 2698 { 2699 struct input_event hold_quit; 2700 2701 EVENT_INIT (hold_quit); 2702 hold_quit.kind = NO_EVENT; 2703 2704 read_alarm_should_throw = 0; 2705 if (! setjmp (read_alarm_throw)) 2706 nread = (*read_socket_hook) (0, 1, &hold_quit); 2707 else 2708 nread = -1; 2709 2710 if (hold_quit.kind != NO_EVENT) 2711 kbd_buffer_store_event (&hold_quit); 2712 } 2713 else 2714 { 2715 struct input_event e; 2716 char buf[3]; 2717 nread = read (fileno (stdin), buf, 1); 2718 EVENT_INIT (e); 2719 2720 /* Scan the chars for C-g and store them in kbd_buffer. */ 2721 e.kind = ASCII_KEYSTROKE_EVENT; 2722 e.frame_or_window = selected_frame; 2723 e.modifiers = 0; 2724 for (i = 0; i < nread; i++) 2725 { 2726 /* Convert chars > 0177 to meta events if desired. 2727 We do this under the same conditions that read_avail_input does. */ 2728 if (read_socket_hook == 0) 2729 { 2730 /* If the user says she has a meta key, then believe her. */ 2731 if (meta_key == 1 && (buf[i] & 0x80)) 2732 e.modifiers = meta_modifier; 2733 if (meta_key != 2) 2734 buf[i] &= ~0x80; 2735 } 2736 2737 XSETINT (e.code, buf[i]); 2738 kbd_buffer_store_event (&e); 2739 /* Don't look at input that follows a C-g too closely. 2740 This reduces lossage due to autorepeat on C-g. */ 2741 if (buf[i] == quit_char) 2742 break; 2743 } 2744 } 2745} 2746 2747#endif /* not HAVE_SELECT */ 2748#endif /* not VMS */ 2749#endif /* not MSDOS */ 2750 2751#ifdef BSD4_1 2752void 2753init_sigio (fd) 2754 int fd; 2755{ 2756 if (noninteractive) 2757 return; 2758 lmode = LINTRUP | lmode; 2759 ioctl (fd, TIOCLSET, &lmode); 2760} 2761 2762void 2763reset_sigio () 2764{ 2765 if (noninteractive) 2766 return; 2767 lmode = ~LINTRUP & lmode; 2768 ioctl (0, TIOCLSET, &lmode); 2769} 2770 2771void 2772request_sigio () 2773{ 2774 if (noninteractive) 2775 return; 2776 sigrelse (SIGTINT); 2777 2778 interrupts_deferred = 0; 2779} 2780 2781void 2782unrequest_sigio () 2783{ 2784 if (noninteractive) 2785 return; 2786 sighold (SIGTINT); 2787 2788 interrupts_deferred = 1; 2789} 2790 2791/* still inside #ifdef BSD4_1 */ 2792#ifdef subprocesses 2793 2794int sigheld; /* Mask of held signals */ 2795 2796void 2797sigholdx (signum) 2798 int signum; 2799{ 2800 sigheld |= sigbit (signum); 2801 sighold (signum); 2802} 2803 2804void 2805sigisheld (signum) 2806 int signum; 2807{ 2808 sigheld |= sigbit (signum); 2809} 2810 2811void 2812sigunhold (signum) 2813 int signum; 2814{ 2815 sigheld &= ~sigbit (signum); 2816 sigrelse (signum); 2817} 2818 2819void 2820sigfree () /* Free all held signals */ 2821{ 2822 int i; 2823 for (i = 0; i < NSIG; i++) 2824 if (sigheld & sigbit (i)) 2825 sigrelse (i); 2826 sigheld = 0; 2827} 2828 2829int 2830sigbit (i) 2831{ 2832 return 1 << (i - 1); 2833} 2834#endif /* subprocesses */ 2835#endif /* BSD4_1 */ 2836 2837/* POSIX signals support - DJB */ 2838/* Anyone with POSIX signals should have ANSI C declarations */ 2839 2840#ifdef POSIX_SIGNALS 2841 2842sigset_t empty_mask, full_mask; 2843 2844signal_handler_t 2845sys_signal (int signal_number, signal_handler_t action) 2846{ 2847 struct sigaction new_action, old_action; 2848 sigemptyset (&new_action.sa_mask); 2849 new_action.sa_handler = action; 2850#if defined (SA_RESTART) && ! defined (BROKEN_SA_RESTART) && !defined(SYNC_INPUT) 2851 /* Emacs mostly works better with restartable system services. If this 2852 flag exists, we probably want to turn it on here. 2853 However, on some systems this resets the timeout of `select' 2854 which means that `select' never finishes if it keeps getting signals. 2855 BROKEN_SA_RESTART is defined on those systems. */ 2856 /* It's not clear why the comment above says "mostly works better". --Stef 2857 When SYNC_INPUT is set, we don't want SA_RESTART because we need to poll 2858 for pending input so we need long-running syscalls to be interrupted 2859 after a signal that sets the interrupt_input_pending flag. */ 2860 new_action.sa_flags = SA_RESTART; 2861#else 2862 new_action.sa_flags = 0; 2863#endif 2864 sigaction (signal_number, &new_action, &old_action); 2865 return (old_action.sa_handler); 2866} 2867 2868#ifndef __GNUC__ 2869/* If we're compiling with GCC, we don't need this function, since it 2870 can be written as a macro. */ 2871sigset_t 2872sys_sigmask (int sig) 2873{ 2874 sigset_t mask; 2875 sigemptyset (&mask); 2876 sigaddset (&mask, sig); 2877 return mask; 2878} 2879#endif 2880 2881/* I'd like to have these guys return pointers to the mask storage in here, 2882 but there'd be trouble if the code was saving multiple masks. I'll be 2883 safe and pass the structure. It normally won't be more than 2 bytes 2884 anyhow. - DJB */ 2885 2886sigset_t 2887sys_sigblock (sigset_t new_mask) 2888{ 2889 sigset_t old_mask; 2890 sigprocmask (SIG_BLOCK, &new_mask, &old_mask); 2891 return (old_mask); 2892} 2893 2894sigset_t 2895sys_sigunblock (sigset_t new_mask) 2896{ 2897 sigset_t old_mask; 2898 sigprocmask (SIG_UNBLOCK, &new_mask, &old_mask); 2899 return (old_mask); 2900} 2901 2902sigset_t 2903sys_sigsetmask (sigset_t new_mask) 2904{ 2905 sigset_t old_mask; 2906 sigprocmask (SIG_SETMASK, &new_mask, &old_mask); 2907 return (old_mask); 2908} 2909 2910#endif /* POSIX_SIGNALS */ 2911 2912#if !defined HAVE_STRSIGNAL && !HAVE_DECL_SYS_SIGLIST 2913static char *my_sys_siglist[NSIG]; 2914# ifdef sys_siglist 2915# undef sys_siglist 2916# endif 2917# define sys_siglist my_sys_siglist 2918#endif 2919 2920void 2921init_signals () 2922{ 2923#ifdef POSIX_SIGNALS 2924 sigemptyset (&empty_mask); 2925 sigfillset (&full_mask); 2926#endif 2927 2928#if !defined HAVE_STRSIGNAL && !HAVE_DECL_SYS_SIGLIST 2929 if (! initialized) 2930 { 2931# ifdef SIGABRT 2932 sys_siglist[SIGABRT] = "Aborted"; 2933# endif 2934# ifdef SIGAIO 2935 sys_siglist[SIGAIO] = "LAN I/O interrupt"; 2936# endif 2937# ifdef SIGALRM 2938 sys_siglist[SIGALRM] = "Alarm clock"; 2939# endif 2940# ifdef SIGBUS 2941 sys_siglist[SIGBUS] = "Bus error"; 2942# endif 2943# ifdef SIGCLD 2944 sys_siglist[SIGCLD] = "Child status changed"; 2945# endif 2946# ifdef SIGCHLD 2947 sys_siglist[SIGCHLD] = "Child status changed"; 2948# endif 2949# ifdef SIGCONT 2950 sys_siglist[SIGCONT] = "Continued"; 2951# endif 2952# ifdef SIGDANGER 2953 sys_siglist[SIGDANGER] = "Swap space dangerously low"; 2954# endif 2955# ifdef SIGDGNOTIFY 2956 sys_siglist[SIGDGNOTIFY] = "Notification message in queue"; 2957# endif 2958# ifdef SIGEMT 2959 sys_siglist[SIGEMT] = "Emulation trap"; 2960# endif 2961# ifdef SIGFPE 2962 sys_siglist[SIGFPE] = "Arithmetic exception"; 2963# endif 2964# ifdef SIGFREEZE 2965 sys_siglist[SIGFREEZE] = "SIGFREEZE"; 2966# endif 2967# ifdef SIGGRANT 2968 sys_siglist[SIGGRANT] = "Monitor mode granted"; 2969# endif 2970# ifdef SIGHUP 2971 sys_siglist[SIGHUP] = "Hangup"; 2972# endif 2973# ifdef SIGILL 2974 sys_siglist[SIGILL] = "Illegal instruction"; 2975# endif 2976# ifdef SIGINT 2977 sys_siglist[SIGINT] = "Interrupt"; 2978# endif 2979# ifdef SIGIO 2980 sys_siglist[SIGIO] = "I/O possible"; 2981# endif 2982# ifdef SIGIOINT 2983 sys_siglist[SIGIOINT] = "I/O intervention required"; 2984# endif 2985# ifdef SIGIOT 2986 sys_siglist[SIGIOT] = "IOT trap"; 2987# endif 2988# ifdef SIGKILL 2989 sys_siglist[SIGKILL] = "Killed"; 2990# endif 2991# ifdef SIGLOST 2992 sys_siglist[SIGLOST] = "Resource lost"; 2993# endif 2994# ifdef SIGLWP 2995 sys_siglist[SIGLWP] = "SIGLWP"; 2996# endif 2997# ifdef SIGMSG 2998 sys_siglist[SIGMSG] = "Monitor mode data available"; 2999# endif 3000# ifdef SIGPHONE 3001 sys_siglist[SIGWIND] = "SIGPHONE"; 3002# endif 3003# ifdef SIGPIPE 3004 sys_siglist[SIGPIPE] = "Broken pipe"; 3005# endif 3006# ifdef SIGPOLL 3007 sys_siglist[SIGPOLL] = "Pollable event occurred"; 3008# endif 3009# ifdef SIGPROF 3010 sys_siglist[SIGPROF] = "Profiling timer expired"; 3011# endif 3012# ifdef SIGPTY 3013 sys_siglist[SIGPTY] = "PTY I/O interrupt"; 3014# endif 3015# ifdef SIGPWR 3016 sys_siglist[SIGPWR] = "Power-fail restart"; 3017# endif 3018# ifdef SIGQUIT 3019 sys_siglist[SIGQUIT] = "Quit"; 3020# endif 3021# ifdef SIGRETRACT 3022 sys_siglist[SIGRETRACT] = "Need to relinguish monitor mode"; 3023# endif 3024# ifdef SIGSAK 3025 sys_siglist[SIGSAK] = "Secure attention"; 3026# endif 3027# ifdef SIGSEGV 3028 sys_siglist[SIGSEGV] = "Segmentation violation"; 3029# endif 3030# ifdef SIGSOUND 3031 sys_siglist[SIGSOUND] = "Sound completed"; 3032# endif 3033# ifdef SIGSTOP 3034 sys_siglist[SIGSTOP] = "Stopped (signal)"; 3035# endif 3036# ifdef SIGSTP 3037 sys_siglist[SIGSTP] = "Stopped (user)"; 3038# endif 3039# ifdef SIGSYS 3040 sys_siglist[SIGSYS] = "Bad argument to system call"; 3041# endif 3042# ifdef SIGTERM 3043 sys_siglist[SIGTERM] = "Terminated"; 3044# endif 3045# ifdef SIGTHAW 3046 sys_siglist[SIGTHAW] = "SIGTHAW"; 3047# endif 3048# ifdef SIGTRAP 3049 sys_siglist[SIGTRAP] = "Trace/breakpoint trap"; 3050# endif 3051# ifdef SIGTSTP 3052 sys_siglist[SIGTSTP] = "Stopped (user)"; 3053# endif 3054# ifdef SIGTTIN 3055 sys_siglist[SIGTTIN] = "Stopped (tty input)"; 3056# endif 3057# ifdef SIGTTOU 3058 sys_siglist[SIGTTOU] = "Stopped (tty output)"; 3059# endif 3060# ifdef SIGURG 3061 sys_siglist[SIGURG] = "Urgent I/O condition"; 3062# endif 3063# ifdef SIGUSR1 3064 sys_siglist[SIGUSR1] = "User defined signal 1"; 3065# endif 3066# ifdef SIGUSR2 3067 sys_siglist[SIGUSR2] = "User defined signal 2"; 3068# endif 3069# ifdef SIGVTALRM 3070 sys_siglist[SIGVTALRM] = "Virtual timer expired"; 3071# endif 3072# ifdef SIGWAITING 3073 sys_siglist[SIGWAITING] = "Process's LWPs are blocked"; 3074# endif 3075# ifdef SIGWINCH 3076 sys_siglist[SIGWINCH] = "Window size changed"; 3077# endif 3078# ifdef SIGWIND 3079 sys_siglist[SIGWIND] = "SIGWIND"; 3080# endif 3081# ifdef SIGXCPU 3082 sys_siglist[SIGXCPU] = "CPU time limit exceeded"; 3083# endif 3084# ifdef SIGXFSZ 3085 sys_siglist[SIGXFSZ] = "File size limit exceeded"; 3086# endif 3087 } 3088#endif /* !defined HAVE_STRSIGNAL && !defined HAVE_DECL_SYS_SIGLIST */ 3089} 3090 3091#ifndef HAVE_RANDOM 3092#ifdef random 3093#define HAVE_RANDOM 3094#endif 3095#endif 3096 3097/* Figure out how many bits the system's random number generator uses. 3098 `random' and `lrand48' are assumed to return 31 usable bits. 3099 BSD `rand' returns a 31 bit value but the low order bits are unusable; 3100 so we'll shift it and treat it like the 15-bit USG `rand'. */ 3101 3102#ifndef RAND_BITS 3103# ifdef HAVE_RANDOM 3104# define RAND_BITS 31 3105# else /* !HAVE_RANDOM */ 3106# ifdef HAVE_LRAND48 3107# define RAND_BITS 31 3108# define random lrand48 3109# else /* !HAVE_LRAND48 */ 3110# define RAND_BITS 15 3111# if RAND_MAX == 32767 3112# define random rand 3113# else /* RAND_MAX != 32767 */ 3114# if RAND_MAX == 2147483647 3115# define random() (rand () >> 16) 3116# else /* RAND_MAX != 2147483647 */ 3117# ifdef USG 3118# define random rand 3119# else 3120# define random() (rand () >> 16) 3121# endif /* !USG */ 3122# endif /* RAND_MAX != 2147483647 */ 3123# endif /* RAND_MAX != 32767 */ 3124# endif /* !HAVE_LRAND48 */ 3125# endif /* !HAVE_RANDOM */ 3126#endif /* !RAND_BITS */ 3127 3128void 3129seed_random (arg) 3130 long arg; 3131{ 3132#ifdef HAVE_RANDOM 3133 srandom ((unsigned int)arg); 3134#else 3135# ifdef HAVE_LRAND48 3136 srand48 (arg); 3137# else 3138 srand ((unsigned int)arg); 3139# endif 3140#endif 3141} 3142 3143/* 3144 * Build a full Emacs-sized word out of whatever we've got. 3145 * This suffices even for a 64-bit architecture with a 15-bit rand. 3146 */ 3147long 3148get_random () 3149{ 3150 long val = random (); 3151#if VALBITS > RAND_BITS 3152 val = (val << RAND_BITS) ^ random (); 3153#if VALBITS > 2*RAND_BITS 3154 val = (val << RAND_BITS) ^ random (); 3155#if VALBITS > 3*RAND_BITS 3156 val = (val << RAND_BITS) ^ random (); 3157#if VALBITS > 4*RAND_BITS 3158 val = (val << RAND_BITS) ^ random (); 3159#endif /* need at least 5 */ 3160#endif /* need at least 4 */ 3161#endif /* need at least 3 */ 3162#endif /* need at least 2 */ 3163 return val & ((1L << VALBITS) - 1); 3164} 3165 3166#ifdef WRONG_NAME_INSQUE 3167 3168insque (q,p) 3169 caddr_t q,p; 3170{ 3171 _insque (q,p); 3172} 3173 3174#endif 3175 3176#ifdef VMS 3177 3178#ifdef getenv 3179/* If any place else asks for the TERM variable, 3180 allow it to be overridden with the EMACS_TERM variable 3181 before attempting to translate the logical name TERM. As a last 3182 resort, ask for VAX C's special idea of the TERM variable. */ 3183#undef getenv 3184char * 3185sys_getenv (name) 3186 char *name; 3187{ 3188 register char *val; 3189 static char buf[256]; 3190 static struct dsc$descriptor_s equiv 3191 = {sizeof (buf), DSC$K_DTYPE_T, DSC$K_CLASS_S, buf}; 3192 static struct dsc$descriptor_s d_name 3193 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0}; 3194 short eqlen; 3195 3196 if (!strcmp (name, "TERM")) 3197 { 3198 val = (char *) getenv ("EMACS_TERM"); 3199 if (val) 3200 return val; 3201 } 3202 3203 d_name.dsc$w_length = strlen (name); 3204 d_name.dsc$a_pointer = name; 3205 if (LIB$SYS_TRNLOG (&d_name, &eqlen, &equiv) == 1) 3206 { 3207 char *str = (char *) xmalloc (eqlen + 1); 3208 bcopy (buf, str, eqlen); 3209 str[eqlen] = '\0'; 3210 /* This is a storage leak, but a pain to fix. With luck, 3211 no one will ever notice. */ 3212 return str; 3213 } 3214 return (char *) getenv (name); 3215} 3216#endif /* getenv */ 3217 3218#ifdef abort 3219/* Since VMS doesn't believe in core dumps, the only way to debug this beast is 3220 to force a call on the debugger from within the image. */ 3221#undef abort 3222sys_abort () 3223{ 3224 reset_sys_modes (); 3225 LIB$SIGNAL (SS$_DEBUG); 3226} 3227#endif /* abort */ 3228#endif /* VMS */ 3229 3230#ifdef VMS 3231#ifdef LINK_CRTL_SHARE 3232#ifdef SHARABLE_LIB_BUG 3233/* Variables declared noshare and initialized in sharable libraries 3234 cannot be shared. The VMS linker incorrectly forces you to use a private 3235 version which is uninitialized... If not for this "feature", we 3236 could use the C library definition of sys_nerr and sys_errlist. */ 3237int sys_nerr = 35; 3238char *sys_errlist[] = 3239 { 3240 "error 0", 3241 "not owner", 3242 "no such file or directory", 3243 "no such process", 3244 "interrupted system call", 3245 "i/o error", 3246 "no such device or address", 3247 "argument list too long", 3248 "exec format error", 3249 "bad file number", 3250 "no child process", 3251 "no more processes", 3252 "not enough memory", 3253 "permission denied", 3254 "bad address", 3255 "block device required", 3256 "mount devices busy", 3257 "file exists", 3258 "cross-device link", 3259 "no such device", 3260 "not a directory", 3261 "is a directory", 3262 "invalid argument", 3263 "file table overflow", 3264 "too many open files", 3265 "not a typewriter", 3266 "text file busy", 3267 "file too big", 3268 "no space left on device", 3269 "illegal seek", 3270 "read-only file system", 3271 "too many links", 3272 "broken pipe", 3273 "math argument", 3274 "result too large", 3275 "I/O stream empty", 3276 "vax/vms specific error code nontranslatable error" 3277 }; 3278#endif /* SHARABLE_LIB_BUG */ 3279#endif /* LINK_CRTL_SHARE */ 3280#endif /* VMS */ 3281 3282#ifndef HAVE_STRERROR 3283#ifndef WINDOWSNT 3284char * 3285strerror (errnum) 3286 int errnum; 3287{ 3288 extern char *sys_errlist[]; 3289 extern int sys_nerr; 3290 3291 if (errnum >= 0 && errnum < sys_nerr) 3292 return sys_errlist[errnum]; 3293 return (char *) "Unknown error"; 3294} 3295#endif /* not WINDOWSNT */ 3296#endif /* ! HAVE_STRERROR */ 3297 3298int 3299emacs_open (path, oflag, mode) 3300 const char *path; 3301 int oflag, mode; 3302{ 3303 register int rtnval; 3304 3305#ifdef BSD4_1 3306 if (oflag & O_CREAT) 3307 return creat (path, mode); 3308#endif 3309 3310 while ((rtnval = open (path, oflag, mode)) == -1 3311 && (errno == EINTR)) 3312 QUIT; 3313 return (rtnval); 3314} 3315 3316int 3317emacs_close (fd) 3318 int fd; 3319{ 3320 int did_retry = 0; 3321 register int rtnval; 3322 3323 while ((rtnval = close (fd)) == -1 3324 && (errno == EINTR)) 3325 did_retry = 1; 3326 3327 /* If close is interrupted SunOS 4.1 may or may not have closed the 3328 file descriptor. If it did the second close will fail with 3329 errno = EBADF. That means we have succeeded. */ 3330 if (rtnval == -1 && did_retry && errno == EBADF) 3331 return 0; 3332 3333 return rtnval; 3334} 3335 3336int 3337emacs_read (fildes, buf, nbyte) 3338 int fildes; 3339 char *buf; 3340 unsigned int nbyte; 3341{ 3342 register int rtnval; 3343 3344 while ((rtnval = read (fildes, buf, nbyte)) == -1 3345 && (errno == EINTR)) 3346 QUIT; 3347 return (rtnval); 3348} 3349 3350int 3351emacs_write (fildes, buf, nbyte) 3352 int fildes; 3353 const char *buf; 3354 unsigned int nbyte; 3355{ 3356 register int rtnval, bytes_written; 3357 3358 bytes_written = 0; 3359 3360 while (nbyte > 0) 3361 { 3362 rtnval = write (fildes, buf, nbyte); 3363 3364 if (rtnval == -1) 3365 { 3366 if (errno == EINTR) 3367 { 3368#ifdef SYNC_INPUT 3369 /* I originally used `QUIT' but that might causes files to 3370 be truncated if you hit C-g in the middle of it. --Stef */ 3371 if (interrupt_input_pending) 3372 handle_async_input (); 3373#endif 3374 continue; 3375 } 3376 else 3377 return (bytes_written ? bytes_written : -1); 3378 } 3379 3380 buf += rtnval; 3381 nbyte -= rtnval; 3382 bytes_written += rtnval; 3383 } 3384 return (bytes_written); 3385} 3386 3387#ifdef USG 3388/* 3389 * All of the following are for USG. 3390 * 3391 * On USG systems the system calls are INTERRUPTIBLE by signals 3392 * that the user program has elected to catch. Thus the system call 3393 * must be retried in these cases. To handle this without massive 3394 * changes in the source code, we remap the standard system call names 3395 * to names for our own functions in sysdep.c that do the system call 3396 * with retries. Actually, for portability reasons, it is good 3397 * programming practice, as this example shows, to limit all actual 3398 * system calls to a single occurrence in the source. Sure, this 3399 * adds an extra level of function call overhead but it is almost 3400 * always negligible. Fred Fish, Unisoft Systems Inc. 3401 */ 3402 3403/* 3404 * Warning, this function may not duplicate 4.2 action properly 3405 * under error conditions. 3406 */ 3407 3408#ifndef MAXPATHLEN 3409/* In 4.1, param.h fails to define this. */ 3410#define MAXPATHLEN 1024 3411#endif 3412 3413#ifndef HAVE_GETWD 3414 3415char * 3416getwd (pathname) 3417 char *pathname; 3418{ 3419 char *npath, *spath; 3420 extern char *getcwd (); 3421 3422 BLOCK_INPUT; /* getcwd uses malloc */ 3423 spath = npath = getcwd ((char *) 0, MAXPATHLEN); 3424 if (spath == 0) 3425 { 3426 UNBLOCK_INPUT; 3427 return spath; 3428 } 3429 /* On Altos 3068, getcwd can return @hostname/dir, so discard 3430 up to first slash. Should be harmless on other systems. */ 3431 while (*npath && *npath != '/') 3432 npath++; 3433 strcpy (pathname, npath); 3434 free (spath); /* getcwd uses malloc */ 3435 UNBLOCK_INPUT; 3436 return pathname; 3437} 3438 3439#endif /* HAVE_GETWD */ 3440 3441/* 3442 * Emulate rename using unlink/link. Note that this is 3443 * only partially correct. Also, doesn't enforce restriction 3444 * that files be of same type (regular->regular, dir->dir, etc). 3445 */ 3446 3447#ifndef HAVE_RENAME 3448 3449rename (from, to) 3450 const char *from; 3451 const char *to; 3452{ 3453 if (access (from, 0) == 0) 3454 { 3455 unlink (to); 3456 if (link (from, to) == 0) 3457 if (unlink (from) == 0) 3458 return (0); 3459 } 3460 return (-1); 3461} 3462 3463#endif 3464 3465 3466#ifdef HPUX 3467#ifndef HAVE_PERROR 3468 3469/* HPUX curses library references perror, but as far as we know 3470 it won't be called. Anyway this definition will do for now. */ 3471 3472perror () 3473{ 3474} 3475 3476#endif /* not HAVE_PERROR */ 3477#endif /* HPUX */ 3478 3479#ifndef HAVE_DUP2 3480 3481/* 3482 * Emulate BSD dup2. First close newd if it already exists. 3483 * Then, attempt to dup oldd. If not successful, call dup2 recursively 3484 * until we are, then close the unsuccessful ones. 3485 */ 3486 3487dup2 (oldd, newd) 3488 int oldd; 3489 int newd; 3490{ 3491 register int fd, ret; 3492 3493 emacs_close (newd); 3494 3495#ifdef F_DUPFD 3496 return fcntl (oldd, F_DUPFD, newd); 3497#else 3498 fd = dup (old); 3499 if (fd == -1) 3500 return -1; 3501 if (fd == new) 3502 return new; 3503 ret = dup2 (old,new); 3504 emacs_close (fd); 3505 return ret; 3506#endif 3507} 3508 3509#endif /* not HAVE_DUP2 */ 3510 3511/* 3512 * Gettimeofday. Simulate as much as possible. Only accurate 3513 * to nearest second. Emacs doesn't use tzp so ignore it for now. 3514 * Only needed when subprocesses are defined. 3515 */ 3516 3517#ifdef subprocesses 3518#ifndef VMS 3519#ifndef HAVE_GETTIMEOFDAY 3520#ifdef HAVE_TIMEVAL 3521 3522/* ARGSUSED */ 3523int 3524gettimeofday (tp, tzp) 3525 struct timeval *tp; 3526 struct timezone *tzp; 3527{ 3528 extern long time (); 3529 3530 tp->tv_sec = time ((long *)0); 3531 tp->tv_usec = 0; 3532 if (tzp != 0) 3533 tzp->tz_minuteswest = -1; 3534 return 0; 3535} 3536 3537#endif 3538#endif 3539#endif 3540#endif /* subprocess && !HAVE_GETTIMEOFDAY && HAVE_TIMEVAL && !VMS */ 3541 3542/* 3543 * This function will go away as soon as all the stubs fixed. (fnf) 3544 */ 3545 3546void 3547croak (badfunc) 3548 char *badfunc; 3549{ 3550 printf ("%s not yet implemented\r\n", badfunc); 3551 reset_sys_modes (); 3552 exit (1); 3553} 3554 3555#endif /* USG */ 3556 3557/* Directory routines for systems that don't have them. */ 3558 3559#ifdef SYSV_SYSTEM_DIR 3560 3561#include <dirent.h> 3562 3563#if defined (BROKEN_CLOSEDIR) || !defined (HAVE_CLOSEDIR) 3564 3565int 3566closedir (dirp) 3567 register DIR *dirp; /* stream from opendir */ 3568{ 3569 int rtnval; 3570 3571 rtnval = emacs_close (dirp->dd_fd); 3572 3573 /* Some systems (like Solaris) allocate the buffer and the DIR all 3574 in one block. Why in the world are we freeing this ourselves 3575 anyway? */ 3576#if ! (defined (sun) && defined (USG5_4)) 3577 xfree ((char *) dirp->dd_buf); /* directory block defined in <dirent.h> */ 3578#endif 3579 xfree ((char *) dirp); 3580 3581 return rtnval; 3582} 3583#endif /* BROKEN_CLOSEDIR or not HAVE_CLOSEDIR */ 3584#endif /* SYSV_SYSTEM_DIR */ 3585 3586#ifdef NONSYSTEM_DIR_LIBRARY 3587 3588DIR * 3589opendir (filename) 3590 char *filename; /* name of directory */ 3591{ 3592 register DIR *dirp; /* -> malloc'ed storage */ 3593 register int fd; /* file descriptor for read */ 3594 struct stat sbuf; /* result of fstat */ 3595 3596 fd = emacs_open (filename, O_RDONLY, 0); 3597 if (fd < 0) 3598 return 0; 3599 3600 BLOCK_INPUT; 3601 if (fstat (fd, &sbuf) < 0 3602 || (sbuf.st_mode & S_IFMT) != S_IFDIR 3603 || (dirp = (DIR *) xmalloc (sizeof (DIR))) == 0) 3604 { 3605 emacs_close (fd); 3606 UNBLOCK_INPUT; 3607 return 0; /* bad luck today */ 3608 } 3609 UNBLOCK_INPUT; 3610 3611 dirp->dd_fd = fd; 3612 dirp->dd_loc = dirp->dd_size = 0; /* refill needed */ 3613 3614 return dirp; 3615} 3616 3617void 3618closedir (dirp) 3619 register DIR *dirp; /* stream from opendir */ 3620{ 3621 emacs_close (dirp->dd_fd); 3622 xfree ((char *) dirp); 3623} 3624 3625 3626#ifndef VMS 3627#define DIRSIZ 14 3628struct olddir 3629 { 3630 ino_t od_ino; /* inode */ 3631 char od_name[DIRSIZ]; /* filename */ 3632 }; 3633#endif /* not VMS */ 3634 3635struct direct dir_static; /* simulated directory contents */ 3636 3637/* ARGUSED */ 3638struct direct * 3639readdir (dirp) 3640 register DIR *dirp; /* stream from opendir */ 3641{ 3642#ifndef VMS 3643 register struct olddir *dp; /* -> directory data */ 3644#else /* VMS */ 3645 register struct dir$_name *dp; /* -> directory data */ 3646 register struct dir$_version *dv; /* -> version data */ 3647#endif /* VMS */ 3648 3649 for (; ;) 3650 { 3651 if (dirp->dd_loc >= dirp->dd_size) 3652 dirp->dd_loc = dirp->dd_size = 0; 3653 3654 if (dirp->dd_size == 0 /* refill buffer */ 3655 && (dirp->dd_size = emacs_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0) 3656 return 0; 3657 3658#ifndef VMS 3659 dp = (struct olddir *) &dirp->dd_buf[dirp->dd_loc]; 3660 dirp->dd_loc += sizeof (struct olddir); 3661 3662 if (dp->od_ino != 0) /* not deleted entry */ 3663 { 3664 dir_static.d_ino = dp->od_ino; 3665 strncpy (dir_static.d_name, dp->od_name, DIRSIZ); 3666 dir_static.d_name[DIRSIZ] = '\0'; 3667 dir_static.d_namlen = strlen (dir_static.d_name); 3668 dir_static.d_reclen = sizeof (struct direct) 3669 - MAXNAMLEN + 3 3670 + dir_static.d_namlen - dir_static.d_namlen % 4; 3671 return &dir_static; /* -> simulated structure */ 3672 } 3673#else /* VMS */ 3674 dp = (struct dir$_name *) dirp->dd_buf; 3675 if (dirp->dd_loc == 0) 3676 dirp->dd_loc = (dp->dir$b_namecount&1) ? dp->dir$b_namecount + 1 3677 : dp->dir$b_namecount; 3678 dv = (struct dir$_version *)&dp->dir$t_name[dirp->dd_loc]; 3679 dir_static.d_ino = dv->dir$w_fid_num; 3680 dir_static.d_namlen = dp->dir$b_namecount; 3681 dir_static.d_reclen = sizeof (struct direct) 3682 - MAXNAMLEN + 3 3683 + dir_static.d_namlen - dir_static.d_namlen % 4; 3684 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount); 3685 dir_static.d_name[dir_static.d_namlen] = '\0'; 3686 dirp->dd_loc = dirp->dd_size; /* only one record at a time */ 3687 return &dir_static; 3688#endif /* VMS */ 3689 } 3690} 3691 3692#ifdef VMS 3693/* readdirver is just like readdir except it returns all versions of a file 3694 as separate entries. */ 3695 3696/* ARGUSED */ 3697struct direct * 3698readdirver (dirp) 3699 register DIR *dirp; /* stream from opendir */ 3700{ 3701 register struct dir$_name *dp; /* -> directory data */ 3702 register struct dir$_version *dv; /* -> version data */ 3703 3704 if (dirp->dd_loc >= dirp->dd_size - sizeof (struct dir$_name)) 3705 dirp->dd_loc = dirp->dd_size = 0; 3706 3707 if (dirp->dd_size == 0 /* refill buffer */ 3708 && (dirp->dd_size = sys_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0) 3709 return 0; 3710 3711 dp = (struct dir$_name *) dirp->dd_buf; 3712 if (dirp->dd_loc == 0) 3713 dirp->dd_loc = (dp->dir$b_namecount & 1) ? dp->dir$b_namecount + 1 3714 : dp->dir$b_namecount; 3715 dv = (struct dir$_version *) &dp->dir$t_name[dirp->dd_loc]; 3716 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount); 3717 sprintf (&dir_static.d_name[dp->dir$b_namecount], ";%d", dv->dir$w_version); 3718 dir_static.d_namlen = strlen (dir_static.d_name); 3719 dir_static.d_ino = dv->dir$w_fid_num; 3720 dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3 3721 + dir_static.d_namlen - dir_static.d_namlen % 4; 3722 dirp->dd_loc = ((char *) (++dv) - dp->dir$t_name); 3723 return &dir_static; 3724} 3725 3726#endif /* VMS */ 3727 3728#endif /* NONSYSTEM_DIR_LIBRARY */ 3729 3730 3731int 3732set_file_times (filename, atime, mtime) 3733 const char *filename; 3734 EMACS_TIME atime, mtime; 3735{ 3736#ifdef HAVE_UTIMES 3737 struct timeval tv[2]; 3738 tv[0] = atime; 3739 tv[1] = mtime; 3740 return utimes (filename, tv); 3741#else /* not HAVE_UTIMES */ 3742 struct utimbuf utb; 3743 utb.actime = EMACS_SECS (atime); 3744 utb.modtime = EMACS_SECS (mtime); 3745 return utime (filename, &utb); 3746#endif /* not HAVE_UTIMES */ 3747} 3748 3749/* mkdir and rmdir functions, for systems which don't have them. */ 3750 3751#ifndef HAVE_MKDIR 3752/* 3753 * Written by Robert Rother, Mariah Corporation, August 1985. 3754 * 3755 * If you want it, it's yours. All I ask in return is that if you 3756 * figure out how to do this in a Bourne Shell script you send me 3757 * a copy. 3758 * sdcsvax!rmr or rmr@uscd 3759 * 3760 * Severely hacked over by John Gilmore to make a 4.2BSD compatible 3761 * subroutine. 11Mar86; hoptoad!gnu 3762 * 3763 * Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir, 3764 * subroutine didn't return EEXIST. It does now. 3765 */ 3766 3767/* 3768 * Make a directory. 3769 */ 3770#ifdef MKDIR_PROTOTYPE 3771MKDIR_PROTOTYPE 3772#else 3773int 3774mkdir (dpath, dmode) 3775 char *dpath; 3776 int dmode; 3777#endif 3778{ 3779 int cpid, status, fd; 3780 struct stat statbuf; 3781 3782 if (stat (dpath, &statbuf) == 0) 3783 { 3784 errno = EEXIST; /* Stat worked, so it already exists */ 3785 return -1; 3786 } 3787 3788 /* If stat fails for a reason other than non-existence, return error */ 3789 if (errno != ENOENT) 3790 return -1; 3791 3792 synch_process_alive = 1; 3793 switch (cpid = fork ()) 3794 { 3795 3796 case -1: /* Error in fork */ 3797 return (-1); /* Errno is set already */ 3798 3799 case 0: /* Child process */ 3800 /* 3801 * Cheap hack to set mode of new directory. Since this 3802 * child process is going away anyway, we zap its umask. 3803 * FIXME, this won't suffice to set SUID, SGID, etc. on this 3804 * directory. Does anybody care? 3805 */ 3806 status = umask (0); /* Get current umask */ 3807 status = umask (status | (0777 & ~dmode)); /* Set for mkdir */ 3808 fd = emacs_open ("/dev/null", O_RDWR, 0); 3809 if (fd >= 0) 3810 { 3811 dup2 (fd, 0); 3812 dup2 (fd, 1); 3813 dup2 (fd, 2); 3814 } 3815 execl ("/bin/mkdir", "mkdir", dpath, (char *) 0); 3816 _exit (-1); /* Can't exec /bin/mkdir */ 3817 3818 default: /* Parent process */ 3819 wait_for_termination (cpid); 3820 } 3821 3822 if (synch_process_death != 0 || synch_process_retcode != 0 3823 || synch_process_termsig != 0) 3824 { 3825 errno = EIO; /* We don't know why, but */ 3826 return -1; /* /bin/mkdir failed */ 3827 } 3828 3829 return 0; 3830} 3831#endif /* not HAVE_MKDIR */ 3832 3833#ifndef HAVE_RMDIR 3834int 3835rmdir (dpath) 3836 char *dpath; 3837{ 3838 int cpid, status, fd; 3839 struct stat statbuf; 3840 3841 if (stat (dpath, &statbuf) != 0) 3842 { 3843 /* Stat just set errno. We don't have to */ 3844 return -1; 3845 } 3846 3847 synch_process_alive = 1; 3848 switch (cpid = fork ()) 3849 { 3850 3851 case -1: /* Error in fork */ 3852 return (-1); /* Errno is set already */ 3853 3854 case 0: /* Child process */ 3855 fd = emacs_open ("/dev/null", O_RDWR, 0); 3856 if (fd >= 0) 3857 { 3858 dup2 (fd, 0); 3859 dup2 (fd, 1); 3860 dup2 (fd, 2); 3861 } 3862 execl ("/bin/rmdir", "rmdir", dpath, (char *) 0); 3863 _exit (-1); /* Can't exec /bin/rmdir */ 3864 3865 default: /* Parent process */ 3866 wait_for_termination (cpid); 3867 } 3868 3869 if (synch_process_death != 0 || synch_process_retcode != 0 3870 || synch_process_termsig != 0) 3871 { 3872 errno = EIO; /* We don't know why, but */ 3873 return -1; /* /bin/rmdir failed */ 3874 } 3875 3876 return 0; 3877} 3878#endif /* !HAVE_RMDIR */ 3879 3880 3881 3882/* Functions for VMS */ 3883#ifdef VMS 3884#include <acldef.h> 3885#include <chpdef.h> 3886#include <jpidef.h> 3887 3888/* Return as a string the VMS error string pertaining to STATUS. 3889 Reuses the same static buffer each time it is called. */ 3890 3891char * 3892vmserrstr (status) 3893 int status; /* VMS status code */ 3894{ 3895 int bufadr[2]; 3896 short len; 3897 static char buf[257]; 3898 3899 bufadr[0] = sizeof buf - 1; 3900 bufadr[1] = (int) buf; 3901 if (! (SYS$GETMSG (status, &len, bufadr, 0x1, 0) & 1)) 3902 return "untranslatable VMS error status"; 3903 buf[len] = '\0'; 3904 return buf; 3905} 3906 3907#ifdef access 3908#undef access 3909 3910/* The following is necessary because 'access' emulation by VMS C (2.0) does 3911 * not work correctly. (It also doesn't work well in version 2.3.) 3912 */ 3913 3914#ifdef VMS4_4 3915 3916#define DESCRIPTOR(name,string) struct dsc$descriptor_s name = \ 3917 { strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string } 3918 3919typedef union { 3920 struct { 3921 unsigned short s_buflen; 3922 unsigned short s_code; 3923 char *s_bufadr; 3924 unsigned short *s_retlenadr; 3925 } s; 3926 int end; 3927} item; 3928#define buflen s.s_buflen 3929#define code s.s_code 3930#define bufadr s.s_bufadr 3931#define retlenadr s.s_retlenadr 3932 3933#define R_OK 4 /* test for read permission */ 3934#define W_OK 2 /* test for write permission */ 3935#define X_OK 1 /* test for execute (search) permission */ 3936#define F_OK 0 /* test for presence of file */ 3937 3938int 3939sys_access (path, mode) 3940 char *path; 3941 int mode; 3942{ 3943 static char *user = NULL; 3944 char dir_fn[512]; 3945 3946 /* translate possible directory spec into .DIR file name, so brain-dead 3947 * access can treat the directory like a file. */ 3948 if (directory_file_name (path, dir_fn)) 3949 path = dir_fn; 3950 3951 if (mode == F_OK) 3952 return access (path, mode); 3953 if (user == NULL && (user = (char *) getenv ("USER")) == NULL) 3954 return -1; 3955 { 3956 int stat; 3957 int flags; 3958 int acces; 3959 unsigned short int dummy; 3960 item itemlst[3]; 3961 static int constant = ACL$C_FILE; 3962 DESCRIPTOR (path_desc, path); 3963 DESCRIPTOR (user_desc, user); 3964 3965 flags = 0; 3966 acces = 0; 3967 if ((mode & X_OK) && ((stat = access (path, mode)) < 0 || mode == X_OK)) 3968 return stat; 3969 if (mode & R_OK) 3970 acces |= CHP$M_READ; 3971 if (mode & W_OK) 3972 acces |= CHP$M_WRITE; 3973 itemlst[0].buflen = sizeof (int); 3974 itemlst[0].code = CHP$_FLAGS; 3975 itemlst[0].bufadr = (char *) &flags; 3976 itemlst[0].retlenadr = &dummy; 3977 itemlst[1].buflen = sizeof (int); 3978 itemlst[1].code = CHP$_ACCESS; 3979 itemlst[1].bufadr = (char *) &acces; 3980 itemlst[1].retlenadr = &dummy; 3981 itemlst[2].end = CHP$_END; 3982 stat = SYS$CHECK_ACCESS (&constant, &path_desc, &user_desc, itemlst); 3983 return stat == SS$_NORMAL ? 0 : -1; 3984 } 3985} 3986 3987#else /* not VMS4_4 */ 3988 3989#include <prvdef.h> 3990#define ACE$M_WRITE 2 3991#define ACE$C_KEYID 1 3992 3993static unsigned short memid, grpid; 3994static unsigned int uic; 3995 3996/* Called from init_sys_modes, so it happens not very often 3997 but at least each time Emacs is loaded. */ 3998void 3999sys_access_reinit () 4000{ 4001 uic = 0; 4002} 4003 4004int 4005sys_access (filename, type) 4006 char * filename; 4007 int type; 4008{ 4009 struct FAB fab; 4010 struct XABPRO xab; 4011 int status, size, i, typecode, acl_controlled; 4012 unsigned int *aclptr, *aclend, aclbuf[60]; 4013 union prvdef prvmask; 4014 4015 /* Get UIC and GRP values for protection checking. */ 4016 if (uic == 0) 4017 { 4018 status = LIB$GETJPI (&JPI$_UIC, 0, 0, &uic, 0, 0); 4019 if (! (status & 1)) 4020 return -1; 4021 memid = uic & 0xFFFF; 4022 grpid = uic >> 16; 4023 } 4024 4025 if (type != 2) /* not checking write access */ 4026 return access (filename, type); 4027 4028 /* Check write protection. */ 4029 4030#define CHECKPRIV(bit) (prvmask.bit) 4031#define WRITABLE(field) (! ((xab.xab$w_pro >> field) & XAB$M_NOWRITE)) 4032 4033 /* Find privilege bits */ 4034 status = SYS$SETPRV (0, 0, 0, prvmask); 4035 if (! (status & 1)) 4036 error ("Unable to find privileges: %s", vmserrstr (status)); 4037 if (CHECKPRIV (PRV$V_BYPASS)) 4038 return 0; /* BYPASS enabled */ 4039 fab = cc$rms_fab; 4040 fab.fab$b_fac = FAB$M_GET; 4041 fab.fab$l_fna = filename; 4042 fab.fab$b_fns = strlen (filename); 4043 fab.fab$l_xab = &xab; 4044 xab = cc$rms_xabpro; 4045 xab.xab$l_aclbuf = aclbuf; 4046 xab.xab$w_aclsiz = sizeof (aclbuf); 4047 status = SYS$OPEN (&fab, 0, 0); 4048 if (! (status & 1)) 4049 return -1; 4050 SYS$CLOSE (&fab, 0, 0); 4051 /* Check system access */ 4052 if (CHECKPRIV (PRV$V_SYSPRV) && WRITABLE (XAB$V_SYS)) 4053 return 0; 4054 /* Check ACL entries, if any */ 4055 acl_controlled = 0; 4056 if (xab.xab$w_acllen > 0) 4057 { 4058 aclptr = aclbuf; 4059 aclend = &aclbuf[xab.xab$w_acllen / 4]; 4060 while (*aclptr && aclptr < aclend) 4061 { 4062 size = (*aclptr & 0xff) / 4; 4063 typecode = (*aclptr >> 8) & 0xff; 4064 if (typecode == ACE$C_KEYID) 4065 for (i = size - 1; i > 1; i--) 4066 if (aclptr[i] == uic) 4067 { 4068 acl_controlled = 1; 4069 if (aclptr[1] & ACE$M_WRITE) 4070 return 0; /* Write access through ACL */ 4071 } 4072 aclptr = &aclptr[size]; 4073 } 4074 if (acl_controlled) /* ACL specified, prohibits write access */ 4075 return -1; 4076 } 4077 /* No ACL entries specified, check normal protection */ 4078 if (WRITABLE (XAB$V_WLD)) /* World writable */ 4079 return 0; 4080 if (WRITABLE (XAB$V_GRP) && 4081 (unsigned short) (xab.xab$l_uic >> 16) == grpid) 4082 return 0; /* Group writable */ 4083 if (WRITABLE (XAB$V_OWN) && 4084 (xab.xab$l_uic & 0xFFFF) == memid) 4085 return 0; /* Owner writable */ 4086 4087 return -1; /* Not writable */ 4088} 4089#endif /* not VMS4_4 */ 4090#endif /* access */ 4091 4092static char vtbuf[NAM$C_MAXRSS+1]; 4093 4094/* translate a vms file spec to a unix path */ 4095char * 4096sys_translate_vms (vfile) 4097 char * vfile; 4098{ 4099 char * p; 4100 char * targ; 4101 4102 if (!vfile) 4103 return 0; 4104 4105 targ = vtbuf; 4106 4107 /* leading device or logical name is a root directory */ 4108 if (p = strchr (vfile, ':')) 4109 { 4110 *targ++ = '/'; 4111 while (vfile < p) 4112 *targ++ = *vfile++; 4113 vfile++; 4114 *targ++ = '/'; 4115 } 4116 p = vfile; 4117 if (*p == '[' || *p == '<') 4118 { 4119 while (*++vfile != *p + 2) 4120 switch (*vfile) 4121 { 4122 case '.': 4123 if (vfile[-1] == *p) 4124 *targ++ = '.'; 4125 *targ++ = '/'; 4126 break; 4127 4128 case '-': 4129 *targ++ = '.'; 4130 *targ++ = '.'; 4131 break; 4132 4133 default: 4134 *targ++ = *vfile; 4135 break; 4136 } 4137 vfile++; 4138 *targ++ = '/'; 4139 } 4140 while (*vfile) 4141 *targ++ = *vfile++; 4142 4143 return vtbuf; 4144} 4145 4146static char utbuf[NAM$C_MAXRSS+1]; 4147 4148/* translate a unix path to a VMS file spec */ 4149char * 4150sys_translate_unix (ufile) 4151 char * ufile; 4152{ 4153 int slash_seen = 0; 4154 char *p; 4155 char * targ; 4156 4157 if (!ufile) 4158 return 0; 4159 4160 targ = utbuf; 4161 4162 if (*ufile == '/') 4163 { 4164 ufile++; 4165 } 4166 4167 while (*ufile) 4168 { 4169 switch (*ufile) 4170 { 4171 case '/': 4172 if (slash_seen) 4173 if (index (&ufile[1], '/')) 4174 *targ++ = '.'; 4175 else 4176 *targ++ = ']'; 4177 else 4178 { 4179 *targ++ = ':'; 4180 if (index (&ufile[1], '/')) 4181 *targ++ = '['; 4182 slash_seen = 1; 4183 } 4184 break; 4185 4186 case '.': 4187 if (strncmp (ufile, "./", 2) == 0) 4188 { 4189 if (!slash_seen) 4190 { 4191 *targ++ = '['; 4192 slash_seen = 1; 4193 } 4194 ufile++; /* skip the dot */ 4195 if (index (&ufile[1], '/')) 4196 *targ++ = '.'; 4197 else 4198 *targ++ = ']'; 4199 } 4200 else if (strncmp (ufile, "../", 3) == 0) 4201 { 4202 if (!slash_seen) 4203 { 4204 *targ++ = '['; 4205 slash_seen = 1; 4206 } 4207 *targ++ = '-'; 4208 ufile += 2; /* skip the dots */ 4209 if (index (&ufile[1], '/')) 4210 *targ++ = '.'; 4211 else 4212 *targ++ = ']'; 4213 } 4214 else 4215 *targ++ = *ufile; 4216 break; 4217 4218 default: 4219 *targ++ = *ufile; 4220 break; 4221 } 4222 ufile++; 4223 } 4224 *targ = '\0'; 4225 4226 return utbuf; 4227} 4228 4229char * 4230getwd (pathname) 4231 char *pathname; 4232{ 4233 char *ptr, *val; 4234 extern char *getcwd (); 4235 4236#define MAXPATHLEN 1024 4237 4238 ptr = xmalloc (MAXPATHLEN); 4239 val = getcwd (ptr, MAXPATHLEN); 4240 if (val == 0) 4241 { 4242 xfree (ptr); 4243 return val; 4244 } 4245 strcpy (pathname, ptr); 4246 xfree (ptr); 4247 4248 return pathname; 4249} 4250 4251int 4252getppid () 4253{ 4254 long item_code = JPI$_OWNER; 4255 unsigned long parent_id; 4256 int status; 4257 4258 if (((status = LIB$GETJPI (&item_code, 0, 0, &parent_id)) & 1) == 0) 4259 { 4260 errno = EVMSERR; 4261 vaxc$errno = status; 4262 return -1; 4263 } 4264 return parent_id; 4265} 4266 4267#undef getuid 4268unsigned 4269sys_getuid () 4270{ 4271 return (getgid () << 16) | getuid (); 4272} 4273 4274#undef read 4275int 4276sys_read (fildes, buf, nbyte) 4277 int fildes; 4278 char *buf; 4279 unsigned int nbyte; 4280{ 4281 return read (fildes, buf, (nbyte < MAXIOSIZE ? nbyte : MAXIOSIZE)); 4282} 4283 4284#if 0 4285int 4286sys_write (fildes, buf, nbyte) 4287 int fildes; 4288 char *buf; 4289 unsigned int nbyte; 4290{ 4291 register int nwrote, rtnval = 0; 4292 4293 while (nbyte > MAXIOSIZE && (nwrote = write (fildes, buf, MAXIOSIZE)) > 0) { 4294 nbyte -= nwrote; 4295 buf += nwrote; 4296 rtnval += nwrote; 4297 } 4298 if (nwrote < 0) 4299 return rtnval ? rtnval : -1; 4300 if ((nwrote = write (fildes, buf, nbyte)) < 0) 4301 return rtnval ? rtnval : -1; 4302 return (rtnval + nwrote); 4303} 4304#endif /* 0 */ 4305 4306/* 4307 * VAX/VMS VAX C RTL really loses. It insists that records 4308 * end with a newline (carriage return) character, and if they 4309 * don't it adds one (nice of it isn't it!) 4310 * 4311 * Thus we do this stupidity below. 4312 */ 4313 4314#undef write 4315int 4316sys_write (fildes, buf, nbytes) 4317 int fildes; 4318 char *buf; 4319 unsigned int nbytes; 4320{ 4321 register char *p; 4322 register char *e; 4323 int sum = 0; 4324 struct stat st; 4325 4326 fstat (fildes, &st); 4327 p = buf; 4328 while (nbytes > 0) 4329 { 4330 int len, retval; 4331 4332 /* Handle fixed-length files with carriage control. */ 4333 if (st.st_fab_rfm == FAB$C_FIX 4334 && ((st.st_fab_rat & (FAB$M_FTN | FAB$M_CR)) != 0)) 4335 { 4336 len = st.st_fab_mrs; 4337 retval = write (fildes, p, min (len, nbytes)); 4338 if (retval != len) 4339 return -1; 4340 retval++; /* This skips the implied carriage control */ 4341 } 4342 else 4343 { 4344 e = p + min (MAXIOSIZE, nbytes) - 1; 4345 while (*e != '\n' && e > p) e--; 4346 if (p == e) /* Ok.. so here we add a newline... sigh. */ 4347 e = p + min (MAXIOSIZE, nbytes) - 1; 4348 len = e + 1 - p; 4349 retval = write (fildes, p, len); 4350 if (retval != len) 4351 return -1; 4352 } 4353 p += retval; 4354 sum += retval; 4355 nbytes -= retval; 4356 } 4357 return sum; 4358} 4359 4360/* Create file NEW copying its attributes from file OLD. If 4361 OLD is 0 or does not exist, create based on the value of 4362 vms_stmlf_recfm. */ 4363 4364/* Protection value the file should ultimately have. 4365 Set by create_copy_attrs, and use by rename_sansversions. */ 4366static unsigned short int fab_final_pro; 4367 4368int 4369creat_copy_attrs (old, new) 4370 char *old, *new; 4371{ 4372 struct FAB fab = cc$rms_fab; 4373 struct XABPRO xabpro; 4374 char aclbuf[256]; /* Choice of size is arbitrary. See below. */ 4375 extern int vms_stmlf_recfm; 4376 4377 if (old) 4378 { 4379 fab.fab$b_fac = FAB$M_GET; 4380 fab.fab$l_fna = old; 4381 fab.fab$b_fns = strlen (old); 4382 fab.fab$l_xab = (char *) &xabpro; 4383 xabpro = cc$rms_xabpro; 4384 xabpro.xab$l_aclbuf = aclbuf; 4385 xabpro.xab$w_aclsiz = sizeof aclbuf; 4386 /* Call $OPEN to fill in the fab & xabpro fields. */ 4387 if (SYS$OPEN (&fab, 0, 0) & 1) 4388 { 4389 SYS$CLOSE (&fab, 0, 0); 4390 fab.fab$l_alq = 0; /* zero the allocation quantity */ 4391 if (xabpro.xab$w_acllen > 0) 4392 { 4393 if (xabpro.xab$w_acllen > sizeof aclbuf) 4394 /* If the acl buffer was too short, redo open with longer one. 4395 Wouldn't need to do this if there were some system imposed 4396 limit on the size of an ACL, but I can't find any such. */ 4397 { 4398 xabpro.xab$l_aclbuf = (char *) alloca (xabpro.xab$w_acllen); 4399 xabpro.xab$w_aclsiz = xabpro.xab$w_acllen; 4400 if (SYS$OPEN (&fab, 0, 0) & 1) 4401 SYS$CLOSE (&fab, 0, 0); 4402 else 4403 old = 0; 4404 } 4405 } 4406 else 4407 xabpro.xab$l_aclbuf = 0; 4408 } 4409 else 4410 old = 0; 4411 } 4412 fab.fab$l_fna = new; 4413 fab.fab$b_fns = strlen (new); 4414 if (!old) 4415 { 4416 fab.fab$l_xab = 0; 4417 fab.fab$b_rfm = vms_stmlf_recfm ? FAB$C_STMLF : FAB$C_VAR; 4418 fab.fab$b_rat = FAB$M_CR; 4419 } 4420 4421 /* Set the file protections such that we will be able to manipulate 4422 this file. Once we are done writing and renaming it, we will set 4423 the protections back. */ 4424 if (old) 4425 fab_final_pro = xabpro.xab$w_pro; 4426 else 4427 SYS$SETDFPROT (0, &fab_final_pro); 4428 xabpro.xab$w_pro &= 0xff0f; /* set O:rewd for now. This is set back later. */ 4429 4430 /* Create the new file with either default attrs or attrs copied 4431 from old file. */ 4432 if (!(SYS$CREATE (&fab, 0, 0) & 1)) 4433 return -1; 4434 SYS$CLOSE (&fab, 0, 0); 4435 /* As this is a "replacement" for creat, return a file descriptor 4436 opened for writing. */ 4437 return open (new, O_WRONLY); 4438} 4439 4440#ifdef creat 4441#undef creat 4442#include <varargs.h> 4443#ifdef __GNUC__ 4444#ifndef va_count 4445#define va_count(X) ((X) = *(((int *) &(va_alist)) - 1)) 4446#endif 4447#endif 4448 4449int 4450sys_creat (va_alist) 4451 va_dcl 4452{ 4453 va_list list_incrementer; 4454 char *name; 4455 int mode; 4456 int rfd; /* related file descriptor */ 4457 int fd; /* Our new file descriptor */ 4458 int count; 4459 struct stat st_buf; 4460 char rfm[12]; 4461 char rat[15]; 4462 char mrs[13]; 4463 char fsz[13]; 4464 extern int vms_stmlf_recfm; 4465 4466 va_count (count); 4467 va_start (list_incrementer); 4468 name = va_arg (list_incrementer, char *); 4469 mode = va_arg (list_incrementer, int); 4470 if (count > 2) 4471 rfd = va_arg (list_incrementer, int); 4472 va_end (list_incrementer); 4473 if (count > 2) 4474 { 4475 /* Use information from the related file descriptor to set record 4476 format of the newly created file. */ 4477 fstat (rfd, &st_buf); 4478 switch (st_buf.st_fab_rfm) 4479 { 4480 case FAB$C_FIX: 4481 strcpy (rfm, "rfm = fix"); 4482 sprintf (mrs, "mrs = %d", st_buf.st_fab_mrs); 4483 strcpy (rat, "rat = "); 4484 if (st_buf.st_fab_rat & FAB$M_CR) 4485 strcat (rat, "cr"); 4486 else if (st_buf.st_fab_rat & FAB$M_FTN) 4487 strcat (rat, "ftn"); 4488 else if (st_buf.st_fab_rat & FAB$M_PRN) 4489 strcat (rat, "prn"); 4490 if (st_buf.st_fab_rat & FAB$M_BLK) 4491 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN)) 4492 strcat (rat, ", blk"); 4493 else 4494 strcat (rat, "blk"); 4495 return creat (name, 0, rfm, rat, mrs); 4496 4497 case FAB$C_VFC: 4498 strcpy (rfm, "rfm = vfc"); 4499 sprintf (fsz, "fsz = %d", st_buf.st_fab_fsz); 4500 strcpy (rat, "rat = "); 4501 if (st_buf.st_fab_rat & FAB$M_CR) 4502 strcat (rat, "cr"); 4503 else if (st_buf.st_fab_rat & FAB$M_FTN) 4504 strcat (rat, "ftn"); 4505 else if (st_buf.st_fab_rat & FAB$M_PRN) 4506 strcat (rat, "prn"); 4507 if (st_buf.st_fab_rat & FAB$M_BLK) 4508 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN)) 4509 strcat (rat, ", blk"); 4510 else 4511 strcat (rat, "blk"); 4512 return creat (name, 0, rfm, rat, fsz); 4513 4514 case FAB$C_STM: 4515 strcpy (rfm, "rfm = stm"); 4516 break; 4517 4518 case FAB$C_STMCR: 4519 strcpy (rfm, "rfm = stmcr"); 4520 break; 4521 4522 case FAB$C_STMLF: 4523 strcpy (rfm, "rfm = stmlf"); 4524 break; 4525 4526 case FAB$C_UDF: 4527 strcpy (rfm, "rfm = udf"); 4528 break; 4529 4530 case FAB$C_VAR: 4531 strcpy (rfm, "rfm = var"); 4532 break; 4533 } 4534 strcpy (rat, "rat = "); 4535 if (st_buf.st_fab_rat & FAB$M_CR) 4536 strcat (rat, "cr"); 4537 else if (st_buf.st_fab_rat & FAB$M_FTN) 4538 strcat (rat, "ftn"); 4539 else if (st_buf.st_fab_rat & FAB$M_PRN) 4540 strcat (rat, "prn"); 4541 if (st_buf.st_fab_rat & FAB$M_BLK) 4542 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN)) 4543 strcat (rat, ", blk"); 4544 else 4545 strcat (rat, "blk"); 4546 } 4547 else 4548 { 4549 strcpy (rfm, vms_stmlf_recfm ? "rfm = stmlf" : "rfm=var"); 4550 strcpy (rat, "rat=cr"); 4551 } 4552 /* Until the VAX C RTL fixes the many bugs with modes, always use 4553 mode 0 to get the user's default protection. */ 4554 fd = creat (name, 0, rfm, rat); 4555 if (fd < 0 && errno == EEXIST) 4556 { 4557 if (unlink (name) < 0) 4558 report_file_error ("delete", build_string (name)); 4559 fd = creat (name, 0, rfm, rat); 4560 } 4561 return fd; 4562} 4563#endif /* creat */ 4564 4565/* fwrite to stdout is S L O W. Speed it up by using fputc...*/ 4566int 4567sys_fwrite (ptr, size, num, fp) 4568 register char * ptr; 4569 FILE * fp; 4570{ 4571 register int tot = num * size; 4572 4573 while (tot--) 4574 fputc (*ptr++, fp); 4575 return num; 4576} 4577 4578/* 4579 * The VMS C library routine creat actually creates a new version of an 4580 * existing file rather than truncating the old version. There are times 4581 * when this is not the desired behavior, for instance, when writing an 4582 * auto save file (you only want one version), or when you don't have 4583 * write permission in the directory containing the file (but the file 4584 * itself is writable). Hence this routine, which is equivalent to 4585 * "close (creat (fn, 0));" on Unix if fn already exists. 4586 */ 4587int 4588vms_truncate (fn) 4589 char *fn; 4590{ 4591 struct FAB xfab = cc$rms_fab; 4592 struct RAB xrab = cc$rms_rab; 4593 int status; 4594 4595 xfab.fab$l_fop = FAB$M_TEF; /* free allocated but unused blocks on close */ 4596 xfab.fab$b_fac = FAB$M_TRN | FAB$M_GET; /* allow truncate and get access */ 4597 xfab.fab$b_shr = FAB$M_NIL; /* allow no sharing - file must be locked */ 4598 xfab.fab$l_fna = fn; 4599 xfab.fab$b_fns = strlen (fn); 4600 xfab.fab$l_dna = ";0"; /* default to latest version of the file */ 4601 xfab.fab$b_dns = 2; 4602 xrab.rab$l_fab = &xfab; 4603 4604 /* This gibberish opens the file, positions to the first record, and 4605 deletes all records from there until the end of file. */ 4606 if ((SYS$OPEN (&xfab) & 01) == 01) 4607 { 4608 if ((SYS$CONNECT (&xrab) & 01) == 01 && 4609 (SYS$FIND (&xrab) & 01) == 01 && 4610 (SYS$TRUNCATE (&xrab) & 01) == 01) 4611 status = 0; 4612 else 4613 status = -1; 4614 } 4615 else 4616 status = -1; 4617 SYS$CLOSE (&xfab); 4618 return status; 4619} 4620 4621/* Define this symbol to actually read SYSUAF.DAT. This requires either 4622 SYSPRV or a readable SYSUAF.DAT. */ 4623 4624#ifdef READ_SYSUAF 4625/* 4626 * getuaf.c 4627 * 4628 * Routine to read the VMS User Authorization File and return 4629 * a specific user's record. 4630 */ 4631 4632static struct UAF retuaf; 4633 4634struct UAF * 4635get_uaf_name (uname) 4636 char * uname; 4637{ 4638 register status; 4639 struct FAB uaf_fab; 4640 struct RAB uaf_rab; 4641 4642 uaf_fab = cc$rms_fab; 4643 uaf_rab = cc$rms_rab; 4644 /* initialize fab fields */ 4645 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT"; 4646 uaf_fab.fab$b_fns = 21; 4647 uaf_fab.fab$b_fac = FAB$M_GET; 4648 uaf_fab.fab$b_org = FAB$C_IDX; 4649 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL; 4650 /* initialize rab fields */ 4651 uaf_rab.rab$l_fab = &uaf_fab; 4652 /* open the User Authorization File */ 4653 status = SYS$OPEN (&uaf_fab); 4654 if (!(status&1)) 4655 { 4656 errno = EVMSERR; 4657 vaxc$errno = status; 4658 return 0; 4659 } 4660 status = SYS$CONNECT (&uaf_rab); 4661 if (!(status&1)) 4662 { 4663 errno = EVMSERR; 4664 vaxc$errno = status; 4665 return 0; 4666 } 4667 /* read the requested record - index is in uname */ 4668 uaf_rab.rab$l_kbf = uname; 4669 uaf_rab.rab$b_ksz = strlen (uname); 4670 uaf_rab.rab$b_rac = RAB$C_KEY; 4671 uaf_rab.rab$l_ubf = (char *)&retuaf; 4672 uaf_rab.rab$w_usz = sizeof retuaf; 4673 status = SYS$GET (&uaf_rab); 4674 if (!(status&1)) 4675 { 4676 errno = EVMSERR; 4677 vaxc$errno = status; 4678 return 0; 4679 } 4680 /* close the User Authorization File */ 4681 status = SYS$DISCONNECT (&uaf_rab); 4682 if (!(status&1)) 4683 { 4684 errno = EVMSERR; 4685 vaxc$errno = status; 4686 return 0; 4687 } 4688 status = SYS$CLOSE (&uaf_fab); 4689 if (!(status&1)) 4690 { 4691 errno = EVMSERR; 4692 vaxc$errno = status; 4693 return 0; 4694 } 4695 return &retuaf; 4696} 4697 4698struct UAF * 4699get_uaf_uic (uic) 4700 unsigned long uic; 4701{ 4702 register status; 4703 struct FAB uaf_fab; 4704 struct RAB uaf_rab; 4705 4706 uaf_fab = cc$rms_fab; 4707 uaf_rab = cc$rms_rab; 4708 /* initialize fab fields */ 4709 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT"; 4710 uaf_fab.fab$b_fns = 21; 4711 uaf_fab.fab$b_fac = FAB$M_GET; 4712 uaf_fab.fab$b_org = FAB$C_IDX; 4713 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL; 4714 /* initialize rab fields */ 4715 uaf_rab.rab$l_fab = &uaf_fab; 4716 /* open the User Authorization File */ 4717 status = SYS$OPEN (&uaf_fab); 4718 if (!(status&1)) 4719 { 4720 errno = EVMSERR; 4721 vaxc$errno = status; 4722 return 0; 4723 } 4724 status = SYS$CONNECT (&uaf_rab); 4725 if (!(status&1)) 4726 { 4727 errno = EVMSERR; 4728 vaxc$errno = status; 4729 return 0; 4730 } 4731 /* read the requested record - index is in uic */ 4732 uaf_rab.rab$b_krf = 1; /* 1st alternate key */ 4733 uaf_rab.rab$l_kbf = (char *) &uic; 4734 uaf_rab.rab$b_ksz = sizeof uic; 4735 uaf_rab.rab$b_rac = RAB$C_KEY; 4736 uaf_rab.rab$l_ubf = (char *)&retuaf; 4737 uaf_rab.rab$w_usz = sizeof retuaf; 4738 status = SYS$GET (&uaf_rab); 4739 if (!(status&1)) 4740 { 4741 errno = EVMSERR; 4742 vaxc$errno = status; 4743 return 0; 4744 } 4745 /* close the User Authorization File */ 4746 status = SYS$DISCONNECT (&uaf_rab); 4747 if (!(status&1)) 4748 { 4749 errno = EVMSERR; 4750 vaxc$errno = status; 4751 return 0; 4752 } 4753 status = SYS$CLOSE (&uaf_fab); 4754 if (!(status&1)) 4755 { 4756 errno = EVMSERR; 4757 vaxc$errno = status; 4758 return 0; 4759 } 4760 return &retuaf; 4761} 4762 4763static struct passwd retpw; 4764 4765struct passwd * 4766cnv_uaf_pw (up) 4767 struct UAF * up; 4768{ 4769 char * ptr; 4770 4771 /* copy these out first because if the username is 32 chars, the next 4772 section will overwrite the first byte of the UIC */ 4773 retpw.pw_uid = up->uaf$w_mem; 4774 retpw.pw_gid = up->uaf$w_grp; 4775 4776 /* I suppose this is not the best style, to possibly overwrite one 4777 byte beyond the end of the field, but what the heck... */ 4778 ptr = &up->uaf$t_username[UAF$S_USERNAME]; 4779 while (ptr[-1] == ' ') 4780 ptr--; 4781 *ptr = '\0'; 4782 strcpy (retpw.pw_name, up->uaf$t_username); 4783 4784 /* the rest of these are counted ascii strings */ 4785 strncpy (retpw.pw_gecos, &up->uaf$t_owner[1], up->uaf$t_owner[0]); 4786 retpw.pw_gecos[up->uaf$t_owner[0]] = '\0'; 4787 strncpy (retpw.pw_dir, &up->uaf$t_defdev[1], up->uaf$t_defdev[0]); 4788 retpw.pw_dir[up->uaf$t_defdev[0]] = '\0'; 4789 strncat (retpw.pw_dir, &up->uaf$t_defdir[1], up->uaf$t_defdir[0]); 4790 retpw.pw_dir[up->uaf$t_defdev[0] + up->uaf$t_defdir[0]] = '\0'; 4791 strncpy (retpw.pw_shell, &up->uaf$t_defcli[1], up->uaf$t_defcli[0]); 4792 retpw.pw_shell[up->uaf$t_defcli[0]] = '\0'; 4793 4794 return &retpw; 4795} 4796#else /* not READ_SYSUAF */ 4797static struct passwd retpw; 4798#endif /* not READ_SYSUAF */ 4799 4800struct passwd * 4801getpwnam (name) 4802 char * name; 4803{ 4804#ifdef READ_SYSUAF 4805 struct UAF *up; 4806#else 4807 char * user; 4808 char * dir; 4809 unsigned char * full; 4810#endif /* READ_SYSUAF */ 4811 char *ptr = name; 4812 4813 while (*ptr) 4814 { 4815 if ('a' <= *ptr && *ptr <= 'z') 4816 *ptr -= 040; 4817 ptr++; 4818 } 4819#ifdef READ_SYSUAF 4820 if (!(up = get_uaf_name (name))) 4821 return 0; 4822 return cnv_uaf_pw (up); 4823#else 4824 if (strcmp (name, getenv ("USER")) == 0) 4825 { 4826 retpw.pw_uid = getuid (); 4827 retpw.pw_gid = getgid (); 4828 strcpy (retpw.pw_name, name); 4829 if (full = egetenv ("FULLNAME")) 4830 strcpy (retpw.pw_gecos, full); 4831 else 4832 *retpw.pw_gecos = '\0'; 4833 strcpy (retpw.pw_dir, egetenv ("HOME")); 4834 *retpw.pw_shell = '\0'; 4835 return &retpw; 4836 } 4837 else 4838 return 0; 4839#endif /* not READ_SYSUAF */ 4840} 4841 4842struct passwd * 4843getpwuid (uid) 4844 unsigned long uid; 4845{ 4846#ifdef READ_SYSUAF 4847 struct UAF * up; 4848 4849 if (!(up = get_uaf_uic (uid))) 4850 return 0; 4851 return cnv_uaf_pw (up); 4852#else 4853 if (uid == sys_getuid ()) 4854 return getpwnam (egetenv ("USER")); 4855 else 4856 return 0; 4857#endif /* not READ_SYSUAF */ 4858} 4859 4860/* return total address space available to the current process. This is 4861 the sum of the current p0 size, p1 size and free page table entries 4862 available. */ 4863int 4864vlimit () 4865{ 4866 int item_code; 4867 unsigned long free_pages; 4868 unsigned long frep0va; 4869 unsigned long frep1va; 4870 register status; 4871 4872 item_code = JPI$_FREPTECNT; 4873 if (((status = LIB$GETJPI (&item_code, 0, 0, &free_pages)) & 1) == 0) 4874 { 4875 errno = EVMSERR; 4876 vaxc$errno = status; 4877 return -1; 4878 } 4879 free_pages *= 512; 4880 4881 item_code = JPI$_FREP0VA; 4882 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep0va)) & 1) == 0) 4883 { 4884 errno = EVMSERR; 4885 vaxc$errno = status; 4886 return -1; 4887 } 4888 item_code = JPI$_FREP1VA; 4889 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep1va)) & 1) == 0) 4890 { 4891 errno = EVMSERR; 4892 vaxc$errno = status; 4893 return -1; 4894 } 4895 4896 return free_pages + frep0va + (0x7fffffff - frep1va); 4897} 4898 4899int 4900define_logical_name (varname, string) 4901 char *varname; 4902 char *string; 4903{ 4904 struct dsc$descriptor_s strdsc = 4905 {strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string}; 4906 struct dsc$descriptor_s envdsc = 4907 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname}; 4908 struct dsc$descriptor_s lnmdsc = 4909 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"}; 4910 4911 return LIB$SET_LOGICAL (&envdsc, &strdsc, &lnmdsc, 0, 0); 4912} 4913 4914int 4915delete_logical_name (varname) 4916 char *varname; 4917{ 4918 struct dsc$descriptor_s envdsc = 4919 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname}; 4920 struct dsc$descriptor_s lnmdsc = 4921 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"}; 4922 4923 return LIB$DELETE_LOGICAL (&envdsc, &lnmdsc); 4924} 4925 4926int 4927ulimit () 4928{ 4929 return 0; 4930} 4931 4932int 4933setpgrp () 4934{ 4935 return 0; 4936} 4937 4938int 4939execvp () 4940{ 4941 error ("execvp system call not implemented"); 4942 return -1; 4943} 4944 4945int 4946rename (from, to) 4947 char *from, *to; 4948{ 4949 int status; 4950 struct FAB from_fab = cc$rms_fab, to_fab = cc$rms_fab; 4951 struct NAM from_nam = cc$rms_nam, to_nam = cc$rms_nam; 4952 char from_esn[NAM$C_MAXRSS]; 4953 char to_esn[NAM$C_MAXRSS]; 4954 4955 from_fab.fab$l_fna = from; 4956 from_fab.fab$b_fns = strlen (from); 4957 from_fab.fab$l_nam = &from_nam; 4958 from_fab.fab$l_fop = FAB$M_NAM; 4959 4960 from_nam.nam$l_esa = from_esn; 4961 from_nam.nam$b_ess = sizeof from_esn; 4962 4963 to_fab.fab$l_fna = to; 4964 to_fab.fab$b_fns = strlen (to); 4965 to_fab.fab$l_nam = &to_nam; 4966 to_fab.fab$l_fop = FAB$M_NAM; 4967 4968 to_nam.nam$l_esa = to_esn; 4969 to_nam.nam$b_ess = sizeof to_esn; 4970 4971 status = SYS$RENAME (&from_fab, 0, 0, &to_fab); 4972 4973 if (status & 1) 4974 return 0; 4975 else 4976 { 4977 if (status == RMS$_DEV) 4978 errno = EXDEV; 4979 else 4980 errno = EVMSERR; 4981 vaxc$errno = status; 4982 return -1; 4983 } 4984} 4985 4986/* This function renames a file like `rename', but it strips 4987 the version number from the "to" filename, such that the "to" file is 4988 will always be a new version. It also sets the file protection once it is 4989 finished. The protection that we will use is stored in fab_final_pro, 4990 and was set when we did a creat_copy_attrs to create the file that we 4991 are renaming. 4992 4993 We could use the chmod function, but Eunichs uses 3 bits per user category 4994 to describe the protection, and VMS uses 4 (write and delete are separate 4995 bits). To maintain portability, the VMS implementation of `chmod' wires 4996 the W and D bits together. */ 4997 4998 4999static struct fibdef fib; /* We need this initialized to zero */ 5000char vms_file_written[NAM$C_MAXRSS]; 5001 5002int 5003rename_sans_version (from,to) 5004 char *from, *to; 5005{ 5006 short int chan; 5007 int stat; 5008 short int iosb[4]; 5009 int status; 5010 struct FAB to_fab = cc$rms_fab; 5011 struct NAM to_nam = cc$rms_nam; 5012 struct dsc$descriptor fib_d ={sizeof (fib),0,0,(char*) &fib}; 5013 struct dsc$descriptor fib_attr[2] 5014 = {{sizeof (fab_final_pro),ATR$C_FPRO,0,(char*) &fab_final_pro},{0,0,0,0}}; 5015 char to_esn[NAM$C_MAXRSS]; 5016 5017 $DESCRIPTOR (disk,to_esn); 5018 5019 to_fab.fab$l_fna = to; 5020 to_fab.fab$b_fns = strlen (to); 5021 to_fab.fab$l_nam = &to_nam; 5022 to_fab.fab$l_fop = FAB$M_NAM; 5023 5024 to_nam.nam$l_esa = to_esn; 5025 to_nam.nam$b_ess = sizeof to_esn; 5026 5027 status = SYS$PARSE (&to_fab, 0, 0); /* figure out the full file name */ 5028 5029 if (to_nam.nam$l_fnb && NAM$M_EXP_VER) 5030 *(to_nam.nam$l_ver) = '\0'; 5031 5032 stat = rename (from, to_esn); 5033 if (stat < 0) 5034 return stat; 5035 5036 strcpy (vms_file_written, to_esn); 5037 5038 to_fab.fab$l_fna = vms_file_written; /* this points to the versionless name */ 5039 to_fab.fab$b_fns = strlen (vms_file_written); 5040 5041 /* Now set the file protection to the correct value */ 5042 SYS$OPEN (&to_fab, 0, 0); /* This fills in the nam$w_fid fields */ 5043 5044 /* Copy these fields into the fib */ 5045 fib.fib$r_fid_overlay.fib$w_fid[0] = to_nam.nam$w_fid[0]; 5046 fib.fib$r_fid_overlay.fib$w_fid[1] = to_nam.nam$w_fid[1]; 5047 fib.fib$r_fid_overlay.fib$w_fid[2] = to_nam.nam$w_fid[2]; 5048 5049 SYS$CLOSE (&to_fab, 0, 0); 5050 5051 stat = SYS$ASSIGN (&disk, &chan, 0, 0); /* open a channel to the disk */ 5052 if (!stat) 5053 LIB$SIGNAL (stat); 5054 stat = SYS$QIOW (0, chan, IO$_MODIFY, iosb, 0, 0, &fib_d, 5055 0, 0, 0, &fib_attr, 0); 5056 if (!stat) 5057 LIB$SIGNAL (stat); 5058 stat = SYS$DASSGN (chan); 5059 if (!stat) 5060 LIB$SIGNAL (stat); 5061 strcpy (vms_file_written, to_esn); /* We will write this to the terminal*/ 5062 return 0; 5063} 5064 5065int 5066link (file, new) 5067 char * file, * new; 5068{ 5069 register status; 5070 struct FAB fab; 5071 struct NAM nam; 5072 unsigned short fid[3]; 5073 char esa[NAM$C_MAXRSS]; 5074 5075 fab = cc$rms_fab; 5076 fab.fab$l_fop = FAB$M_OFP; 5077 fab.fab$l_fna = file; 5078 fab.fab$b_fns = strlen (file); 5079 fab.fab$l_nam = &nam; 5080 5081 nam = cc$rms_nam; 5082 nam.nam$l_esa = esa; 5083 nam.nam$b_ess = NAM$C_MAXRSS; 5084 5085 status = SYS$PARSE (&fab); 5086 if ((status & 1) == 0) 5087 { 5088 errno = EVMSERR; 5089 vaxc$errno = status; 5090 return -1; 5091 } 5092 status = SYS$SEARCH (&fab); 5093 if ((status & 1) == 0) 5094 { 5095 errno = EVMSERR; 5096 vaxc$errno = status; 5097 return -1; 5098 } 5099 5100 fid[0] = nam.nam$w_fid[0]; 5101 fid[1] = nam.nam$w_fid[1]; 5102 fid[2] = nam.nam$w_fid[2]; 5103 5104 fab.fab$l_fna = new; 5105 fab.fab$b_fns = strlen (new); 5106 5107 status = SYS$PARSE (&fab); 5108 if ((status & 1) == 0) 5109 { 5110 errno = EVMSERR; 5111 vaxc$errno = status; 5112 return -1; 5113 } 5114 5115 nam.nam$w_fid[0] = fid[0]; 5116 nam.nam$w_fid[1] = fid[1]; 5117 nam.nam$w_fid[2] = fid[2]; 5118 5119 nam.nam$l_esa = nam.nam$l_name; 5120 nam.nam$b_esl = nam.nam$b_name + nam.nam$b_type + nam.nam$b_ver; 5121 5122 status = SYS$ENTER (&fab); 5123 if ((status & 1) == 0) 5124 { 5125 errno = EVMSERR; 5126 vaxc$errno = status; 5127 return -1; 5128 } 5129 5130 return 0; 5131} 5132 5133void 5134croak (badfunc) 5135 char *badfunc; 5136{ 5137 printf ("%s not yet implemented\r\n", badfunc); 5138 reset_sys_modes (); 5139 exit (1); 5140} 5141 5142long 5143random () 5144{ 5145 /* Arrange to return a range centered on zero. */ 5146 return rand () - (1 << 30); 5147} 5148 5149void 5150srandom (seed) 5151{ 5152 srand (seed); 5153} 5154#endif /* VMS */ 5155 5156#ifdef AIXHFT 5157 5158/* Called from init_sys_modes. */ 5159void 5160hft_init () 5161{ 5162 int junk; 5163 5164 /* If we're not on an HFT we shouldn't do any of this. We determine 5165 if we are on an HFT by trying to get an HFT error code. If this 5166 call fails, we're not on an HFT. */ 5167#ifdef IBMR2AIX 5168 if (ioctl (0, HFQERROR, &junk) < 0) 5169 return; 5170#else /* not IBMR2AIX */ 5171 if (ioctl (0, HFQEIO, 0) < 0) 5172 return; 5173#endif /* not IBMR2AIX */ 5174 5175 /* On AIX the default hft keyboard mapping uses backspace rather than delete 5176 as the rubout key's ASCII code. Here this is changed. The bug is that 5177 there's no way to determine the old mapping, so in reset_sys_modes 5178 we need to assume that the normal map had been present. Of course, this 5179 code also doesn't help if on a terminal emulator which doesn't understand 5180 HFT VTD's. */ 5181 { 5182 struct hfbuf buf; 5183 struct hfkeymap keymap; 5184 5185 buf.hf_bufp = (char *)&keymap; 5186 buf.hf_buflen = sizeof (keymap); 5187 keymap.hf_nkeys = 2; 5188 keymap.hfkey[0].hf_kpos = 15; 5189 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE; 5190#ifdef IBMR2AIX 5191 keymap.hfkey[0].hf_keyidh = '<'; 5192#else /* not IBMR2AIX */ 5193 keymap.hfkey[0].hf_page = '<'; 5194#endif /* not IBMR2AIX */ 5195 keymap.hfkey[0].hf_char = 127; 5196 keymap.hfkey[1].hf_kpos = 15; 5197 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT; 5198#ifdef IBMR2AIX 5199 keymap.hfkey[1].hf_keyidh = '<'; 5200#else /* not IBMR2AIX */ 5201 keymap.hfkey[1].hf_page = '<'; 5202#endif /* not IBMR2AIX */ 5203 keymap.hfkey[1].hf_char = 127; 5204 hftctl (0, HFSKBD, &buf); 5205 } 5206 /* The HFT system on AIX doesn't optimize for scrolling, so it's really ugly 5207 at times. */ 5208 line_ins_del_ok = char_ins_del_ok = 0; 5209} 5210 5211/* Reset the rubout key to backspace. */ 5212 5213void 5214hft_reset () 5215{ 5216 struct hfbuf buf; 5217 struct hfkeymap keymap; 5218 int junk; 5219 5220#ifdef IBMR2AIX 5221 if (ioctl (0, HFQERROR, &junk) < 0) 5222 return; 5223#else /* not IBMR2AIX */ 5224 if (ioctl (0, HFQEIO, 0) < 0) 5225 return; 5226#endif /* not IBMR2AIX */ 5227 5228 buf.hf_bufp = (char *)&keymap; 5229 buf.hf_buflen = sizeof (keymap); 5230 keymap.hf_nkeys = 2; 5231 keymap.hfkey[0].hf_kpos = 15; 5232 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE; 5233#ifdef IBMR2AIX 5234 keymap.hfkey[0].hf_keyidh = '<'; 5235#else /* not IBMR2AIX */ 5236 keymap.hfkey[0].hf_page = '<'; 5237#endif /* not IBMR2AIX */ 5238 keymap.hfkey[0].hf_char = 8; 5239 keymap.hfkey[1].hf_kpos = 15; 5240 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT; 5241#ifdef IBMR2AIX 5242 keymap.hfkey[1].hf_keyidh = '<'; 5243#else /* not IBMR2AIX */ 5244 keymap.hfkey[1].hf_page = '<'; 5245#endif /* not IBMR2AIX */ 5246 keymap.hfkey[1].hf_char = 8; 5247 hftctl (0, HFSKBD, &buf); 5248} 5249 5250#endif /* AIXHFT */ 5251 5252#ifdef USE_DL_STUBS 5253 5254/* These are included on Sunos 4.1 when we do not use shared libraries. 5255 X11 libraries may refer to these functions but (we hope) do not 5256 actually call them. */ 5257 5258void * 5259dlopen () 5260{ 5261 return 0; 5262} 5263 5264void * 5265dlsym () 5266{ 5267 return 0; 5268} 5269 5270int 5271dlclose () 5272{ 5273 return -1; 5274} 5275 5276#endif /* USE_DL_STUBS */ 5277 5278#ifndef BSTRING 5279 5280#ifndef bzero 5281 5282void 5283bzero (b, length) 5284 register char *b; 5285 register int length; 5286{ 5287#ifdef VMS 5288 short zero = 0; 5289 long max_str = 65535; 5290 5291 while (length > max_str) { 5292 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b); 5293 length -= max_str; 5294 b += max_str; 5295 } 5296 max_str = length; 5297 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b); 5298#else 5299 while (length-- > 0) 5300 *b++ = 0; 5301#endif /* not VMS */ 5302} 5303 5304#endif /* no bzero */ 5305#endif /* BSTRING */ 5306 5307#if (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY) 5308#undef bcopy 5309 5310/* Saying `void' requires a declaration, above, where bcopy is used 5311 and that declaration causes pain for systems where bcopy is a macro. */ 5312bcopy (b1, b2, length) 5313 register char *b1; 5314 register char *b2; 5315 register int length; 5316{ 5317#ifdef VMS 5318 long max_str = 65535; 5319 5320 while (length > max_str) { 5321 (void) LIB$MOVC3 (&max_str, b1, b2); 5322 length -= max_str; 5323 b1 += max_str; 5324 b2 += max_str; 5325 } 5326 max_str = length; 5327 (void) LIB$MOVC3 (&length, b1, b2); 5328#else 5329 while (length-- > 0) 5330 *b2++ = *b1++; 5331#endif /* not VMS */ 5332} 5333#endif /* (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY) */ 5334 5335#ifndef BSTRING 5336#ifndef bcmp 5337int 5338bcmp (b1, b2, length) /* This could be a macro! */ 5339 register char *b1; 5340 register char *b2; 5341 register int length; 5342{ 5343#ifdef VMS 5344 struct dsc$descriptor_s src1 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b1}; 5345 struct dsc$descriptor_s src2 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b2}; 5346 5347 return STR$COMPARE (&src1, &src2); 5348#else 5349 while (length-- > 0) 5350 if (*b1++ != *b2++) 5351 return 1; 5352 5353 return 0; 5354#endif /* not VMS */ 5355} 5356#endif /* no bcmp */ 5357#endif /* not BSTRING */ 5358 5359#ifndef HAVE_STRSIGNAL 5360char * 5361strsignal (code) 5362 int code; 5363{ 5364 char *signame = 0; 5365 5366 if (0 <= code && code < NSIG) 5367 { 5368#ifdef VMS 5369 signame = sys_errlist[code]; 5370#else 5371 /* Cast to suppress warning if the table has const char *. */ 5372 signame = (char *) sys_siglist[code]; 5373#endif 5374 } 5375 5376 return signame; 5377} 5378#endif /* HAVE_STRSIGNAL */ 5379 5380/* arch-tag: edb43589-4e09-4544-b325-978b5b121dcf 5381 (do not change this comment) */ 5382