1/* 2 * sh.c: Main shell routines 3 */ 4/*- 5 * Copyright (c) 1980, 1991 The Regents of the University of California. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32#define EXTERN /* Intern */ 33#include "sh.h" 34 35#ifndef lint 36char copyright[] = 37"@(#) Copyright (c) 1991 The Regents of the University of California.\n\ 38 All rights reserved.\n"; 39#endif /* not lint */ 40 41#include "tc.h" 42#include "ed.h" 43#include "tw.h" 44 45extern int MapsAreInited; 46extern int NLSMapsAreInited; 47 48/* 49 * C Shell 50 * 51 * Bill Joy, UC Berkeley, California, USA 52 * October 1978, May 1980 53 * 54 * Jim Kulp, IIASA, Laxenburg, Austria 55 * April 1980 56 * 57 * Filename recognition added: 58 * Ken Greer, Ind. Consultant, Palo Alto CA 59 * October 1983. 60 * 61 * Karl Kleinpaste, Computer Consoles, Inc. 62 * Added precmd, periodic/tperiod, prompt changes, 63 * directory stack hack, and login watch. 64 * Sometime March 1983 - Feb 1984. 65 * 66 * Added scheduled commands, including the "sched" command, 67 * plus the call to sched_run near the precmd et al 68 * routines. 69 * Upgraded scheduled events for running events while 70 * sitting idle at command input. 71 * 72 * Paul Placeway, Ohio State 73 * added stuff for running with twenex/inputl 9 Oct 1984. 74 * 75 * ported to Apple Unix (TM) (OREO) 26 -- 29 Jun 1987 76 */ 77 78jmp_buf_t reslab IZERO_STRUCT; 79struct wordent paraml IZERO_STRUCT; 80 81static const char tcshstr[] = "tcsh"; 82 83struct sigaction parintr; /* Parents interrupt catch */ 84struct sigaction parterm; /* Parents terminate catch */ 85 86#ifdef TESLA 87int do_logout = 0; 88#endif /* TESLA */ 89 90 91int use_fork = 0; /* use fork() instead of vfork()? */ 92 93/* 94 * Magic pointer values. Used to specify other invalid conditions aside 95 * from null. 96 */ 97static Char INVCHAR; 98Char *INVPTR = &INVCHAR; 99Char **INVPPTR = &INVPTR; 100 101static int fast = 0; 102static int mflag = 0; 103static int prompt = 1; 104int enterhist = 0; 105int tellwhat = 0; 106time_t t_period; 107Char *ffile = NULL; 108int dolzero = 0; 109int insource = 0; 110int exitset = 0; 111static time_t chktim; /* Time mail last checked */ 112char *progname; 113int tcsh; 114 115/* 116 * This preserves the input state of the shell. It is used by 117 * st_save and st_restore to manupulate shell state. 118 */ 119struct saved_state { 120 int insource; 121 int OLDSTD; 122 int SHIN; 123 int SHOUT; 124 int SHDIAG; 125 int intty; 126 struct whyle *whyles; 127 Char *gointr; 128 Char *arginp; 129 Char *evalp; 130 Char **evalvec; 131 Char *alvecp; 132 Char **alvec; 133 int onelflg; 134 int enterhist; 135 Char **argv; 136 Char **av; 137 Char HIST; 138 int cantell; 139 struct Bin B; 140 int justpr; 141}; 142 143static int srccat (Char *, Char *); 144#ifndef WINNT_NATIVE 145static int srcfile (const char *, int, int, Char **); 146#else 147int srcfile (const char *, int, int, Char **); 148#endif /*WINNT_NATIVE*/ 149static void srcunit (int, int, int, Char **); 150static void mailchk (void); 151#ifndef _PATH_DEFPATH 152static Char **defaultpath (void); 153#endif 154static void record (void); 155static void st_save (struct saved_state *, int, int, 156 Char **, Char **); 157static void st_restore (void *); 158 159 int main (int, char **); 160 161#ifndef LOCALEDIR 162#define LOCALEDIR "/usr/share/locale" 163#endif 164 165#ifdef NLS_CATALOGS 166static void 167add_localedir_to_nlspath(const char *path) 168{ 169 static const char msgs_LOC[] = "/%L/LC_MESSAGES/%N.cat"; 170 static const char msgs_lang[] = "/%l/LC_MESSAGES/%N.cat"; 171 char *old; 172 char *new, *new_p; 173 size_t len; 174 int add_LOC = 1; 175 int add_lang = 1; 176 char trypath[MAXPATHLEN]; 177 struct stat st; 178 179 if (path == NULL) 180 return; 181 182 (void) xsnprintf(trypath, sizeof(trypath), "%s/C/LC_MESSAGES/tcsh.cat", 183 path); 184 if (stat(trypath, &st) == -1) 185 return; 186 187 if ((old = getenv("NLSPATH")) != NULL) 188 len = strlen(old) + 1; /* don't forget the colon. */ 189 else 190 len = 0; 191 192 len += 2 * strlen(path) + 193 sizeof(msgs_LOC) + sizeof(msgs_lang); /* includes the extra colon */ 194 195 new = new_p = xcalloc(len, 1); 196 197 if (old != NULL) { 198 size_t pathlen = strlen(path); 199 char *old_p; 200 201 (void) xsnprintf(new_p, len, "%s", old); 202 new_p += strlen(new_p); 203 len -= new_p - new; 204 205 /* Check if the paths we try to add are already present in NLSPATH. 206 If so, note it by setting the appropriate flag to 0. */ 207 for (old_p = old; old_p; old_p = strchr(old_p, ':'), 208 old_p = old_p ? old_p + 1 : NULL) { 209 if (strncmp(old_p, path, pathlen) != 0) 210 continue; 211 if (strncmp(old_p + pathlen, msgs_LOC, sizeof(msgs_LOC) - 1) == 0) 212 add_LOC = 0; 213 else if (strncmp(old_p + pathlen, msgs_lang, 214 sizeof(msgs_lang) - 1) == 0) 215 add_lang = 0; 216 } 217 } 218 219 /* Add the message catalog paths not already present to NLSPATH. */ 220 if (add_LOC || add_lang) 221 (void) xsnprintf(new_p, len, "%s%s%s%s%s%s", 222 old ? ":" : "", 223 add_LOC ? path : "", add_LOC ? msgs_LOC : "", 224 add_LOC && add_lang ? ":" : "", 225 add_lang ? path : "", add_lang ? msgs_lang : ""); 226 227 tsetenv(STRNLSPATH, str2short(new)); 228 free(new); 229} 230#endif 231 232int 233main(int argc, char **argv) 234{ 235 int batch = 0; 236 volatile int nexececho = 0; 237 int nofile = 0; 238 volatile int nverbose = 0; 239 volatile int rdirs = 0; 240 volatile int exitcode = 0; 241 int quitit = 0; 242 Char *cp; 243#ifdef AUTOLOGOUT 244 Char *cp2; 245#endif 246 char *tcp, *ttyn; 247 int f, reenter; 248 char **tempv; 249 static const char *targinp = NULL; 250 int osetintr; 251 struct sigaction oparintr; 252 253#ifdef WINNT_NATIVE 254 nt_init(); 255#endif /* WINNT_NATIVE */ 256 257 (void)memset(&reslab, 0, sizeof(reslab)); 258#if defined(NLS_CATALOGS) && defined(LC_MESSAGES) 259 (void) setlocale(LC_MESSAGES, ""); 260#endif /* NLS_CATALOGS && LC_MESSAGES */ 261 262#ifdef NLS 263# ifdef LC_CTYPE 264 (void) setlocale(LC_CTYPE, ""); /* for iscntrl */ 265# endif /* LC_CTYPE */ 266#endif /* NLS */ 267 268 STR_environ = blk2short(environ); 269 environ = short2blk(STR_environ); /* So that we can free it */ 270 271#ifdef NLS_CATALOGS 272 add_localedir_to_nlspath(LOCALEDIR); 273#endif 274 275 nlsinit(); 276 initlex(¶ml); 277 278#ifdef MALLOC_TRACE 279 mal_setstatsfile(fdopen(dmove(xopen("/tmp/tcsh.trace", 280 O_WRONLY|O_CREAT|O_LARGEFILE, 0666), 25), "w")); 281 mal_trace(1); 282#endif /* MALLOC_TRACE */ 283 284#if !(defined(BSDTIMES) || defined(_SEQUENT_)) && defined(POSIX) 285# ifdef _SC_CLK_TCK 286 clk_tck = (clock_t) sysconf(_SC_CLK_TCK); 287# else /* ! _SC_CLK_TCK */ 288# ifdef CLK_TCK 289 clk_tck = CLK_TCK; 290# else /* !CLK_TCK */ 291 clk_tck = HZ; 292# endif /* CLK_TCK */ 293# endif /* _SC_CLK_TCK */ 294#endif /* !BSDTIMES && POSIX */ 295 296 settimes(); /* Immed. estab. timing base */ 297#ifdef TESLA 298 do_logout = 0; 299#endif /* TESLA */ 300 301 /* 302 * Make sure we have 0, 1, 2 open 303 * Otherwise `` jobs will not work... (From knaff@poly.polytechnique.fr) 304 */ 305 { 306 do 307 if ((f = xopen(_PATH_DEVNULL, O_RDONLY|O_LARGEFILE)) == -1 && 308 (f = xopen("/", O_RDONLY|O_LARGEFILE)) == -1) 309 exit(1); 310 while (f < 3); 311 xclose(f); 312 } 313 314 osinit(); /* Os dependent initialization */ 315 316 317 { 318 char *t; 319 320 t = strrchr(argv[0], '/'); 321#ifdef WINNT_NATIVE 322 { 323 char *s = strrchr(argv[0], '\\'); 324 if (s) 325 t = s; 326 } 327#endif /* WINNT_NATIVE */ 328 t = t ? t + 1 : argv[0]; 329 if (*t == '-') t++; 330 progname = strsave((t && *t) ? t : tcshstr); /* never want a null */ 331 tcsh = strncmp(progname, tcshstr, sizeof(tcshstr) - 1) == 0; 332 } 333 334 /* 335 * Initialize non constant strings 336 */ 337#ifdef _PATH_BSHELL 338 STR_BSHELL = SAVE(_PATH_BSHELL); 339#endif 340#ifdef _PATH_TCSHELL 341 STR_SHELLPATH = SAVE(_PATH_TCSHELL); 342#else 343# ifdef _PATH_CSHELL 344 STR_SHELLPATH = SAVE(_PATH_CSHELL); 345# endif 346#endif 347 STR_WORD_CHARS = SAVE(WORD_CHARS); 348 STR_WORD_CHARS_VI = SAVE(WORD_CHARS_VI); 349 350 HIST = '!'; 351 HISTSUB = '^'; 352 PRCH = tcsh ? '>' : '%'; /* to replace %# in $prompt for normal users */ 353 PRCHROOT = '#'; /* likewise for root */ 354 word_chars = STR_WORD_CHARS; 355 bslash_quote = 0; /* PWP: do tcsh-style backslash quoting? */ 356 anyerror = 1; /* for compatibility */ 357 setcopy(STRanyerror, STRNULL, VAR_READWRITE); 358 359 /* Default history size to 100 */ 360 setcopy(STRhistory, str2short("100"), VAR_READWRITE); 361 sethistory(100); 362 363 tempv = argv; 364 ffile = SAVE(tempv[0]); 365 dolzero = 0; 366 if (eq(ffile, STRaout)) /* A.out's are quittable */ 367 quitit = 1; 368 uid = getuid(); 369 gid = getgid(); 370 euid = geteuid(); 371 egid = getegid(); 372 /* 373 * We are a login shell if: 1. we were invoked as -<something> with 374 * optional arguments 2. or we were invoked only with the -l flag 375 */ 376 loginsh = (**tempv == '-') || (argc == 2 && 377 tempv[1][0] == '-' && tempv[1][1] == 'l' && 378 tempv[1][2] == '\0'); 379#ifdef _VMS_POSIX 380 /* No better way to find if we are a login shell */ 381 if (!loginsh) { 382 loginsh = (argc == 1 && getppid() == 1); 383 **tempv = '-'; /* Avoid giving VMS an acidic stomach */ 384 } 385#endif /* _VMS_POSIX */ 386 387 if (loginsh && **tempv != '-') { 388 char *argv0; 389 390 /* 391 * Mangle the argv space 392 */ 393 tempv[1][0] = '\0'; 394 tempv[1][1] = '\0'; 395 tempv[1] = NULL; 396 argv0 = strspl("-", *tempv); 397 *tempv = argv0; 398 argc--; 399 } 400 if (loginsh) { 401 (void) time(&chktim); 402 setNS(STRloginsh); 403 } 404 405 NoNLSRebind = getenv("NOREBIND") != NULL; 406#ifdef NLS 407# ifdef SETLOCALEBUG 408 dont_free = 1; 409# endif /* SETLOCALEBUG */ 410 (void) setlocale(LC_ALL, ""); 411# ifdef LC_COLLATE 412 (void) setlocale(LC_COLLATE, ""); 413# endif 414# ifdef SETLOCALEBUG 415 dont_free = 0; 416# endif /* SETLOCALEBUG */ 417# ifdef STRCOLLBUG 418 fix_strcoll_bug(); 419# endif /* STRCOLLBUG */ 420 421 /* 422 * On solaris ISO8859-1 contains no printable characters in the upper half 423 * so we need to test only for MB_CUR_MAX == 1, otherwise for multi-byte 424 * locales we are always AsciiOnly == 0. 425 */ 426 if (MB_CUR_MAX == 1) { 427 int k; 428 429 for (k = 0200; k <= 0377 && !isprint(CTL_ESC(k)); k++) 430 continue; 431 AsciiOnly = k > 0377; 432 } else 433 AsciiOnly = 0; 434#else 435 AsciiOnly = getenv("LANG") == NULL && getenv("LC_CTYPE") == NULL; 436#endif /* NLS */ 437 if (MapsAreInited && !NLSMapsAreInited) 438 ed_InitNLSMaps(); 439 ResetArrowKeys(); 440 441 /* 442 * Initialize for periodic command intervals. Also, initialize the dummy 443 * tty list for login-watch. 444 */ 445 (void) time(&t_period); 446#ifndef HAVENOUTMP 447 initwatch(); 448#endif /* !HAVENOUTMP */ 449 450#if defined(alliant) 451 /* 452 * From: Jim Pace <jdp@research.att.com> 453 * tcsh does not work properly on the alliants through an rlogin session. 454 * The shell generally hangs. Also, reference to the controlling terminal 455 * does not work ( ie: echo foo > /dev/tty ). 456 * 457 * A security feature was added to rlogind affecting FX/80's Concentrix 458 * from revision 5.5.xx upwards (through 5.7 where this fix was implemented) 459 * This security change also affects the FX/2800 series. 460 * The security change to rlogind requires the process group of an rlogin 461 * session become disassociated with the tty in rlogind. 462 * 463 * The changes needed are: 464 * 1. set the process group 465 * 2. reenable the control terminal 466 */ 467 if (loginsh && isatty(SHIN)) { 468 ttyn = ttyname(SHIN); 469 xclose(SHIN); 470 SHIN = xopen(ttyn, O_RDWR|O_LARGEFILE); 471 shpgrp = getpid(); 472 (void) ioctl (SHIN, TIOCSPGRP, (ioctl_t) &shpgrp); 473 (void) setpgid(0, shpgrp); 474 } 475#endif /* alliant */ 476 477 /* 478 * Move the descriptors to safe places. The variable didfds is 0 while we 479 * have only FSH* to work with. When didfds is true, we have 0,1,2 and 480 * prefer to use these. 481 */ 482 initdesc(); 483 484 cdtohome = 1; 485 setv(STRcdtohome, SAVE(""), VAR_READWRITE); 486 487 /* 488 * Get and set the tty now 489 */ 490 if ((ttyn = ttyname(SHIN)) != NULL) { 491 /* 492 * Could use rindex to get rid of other possible path components, but 493 * hpux preserves the subdirectory /pty/ when storing the tty name in 494 * utmp, so we keep it too. 495 */ 496 if (strncmp(ttyn, "/dev/", 5) == 0) 497 setv(STRtty, cp = SAVE(ttyn + 5), VAR_READWRITE); 498 else 499 setv(STRtty, cp = SAVE(ttyn), VAR_READWRITE); 500 } 501 else 502 setv(STRtty, cp = SAVE(""), VAR_READWRITE); 503 504 /* 505 * Initialize the shell variables. ARGV and PROMPT are initialized later. 506 * STATUS is also munged in several places. CHILD is munged when 507 * forking/waiting 508 */ 509 510 /* 511 * 7-10-87 Paul Placeway autologout should be set ONLY on login shells and 512 * on shells running as root. Out of these, autologout should NOT be set 513 * for any psudo-terminals (this catches most window systems) and not for 514 * any terminal running X windows. 515 * 516 * At Ohio State, we have had problems with a user having his X session 517 * drop out from under him (on a Sun) because the shell in his master 518 * xterm timed out and exited. 519 * 520 * Really, this should be done with a program external to the shell, that 521 * watches for no activity (and NO running programs, such as dump) on a 522 * terminal for a long peroid of time, and then SIGHUPS the shell on that 523 * terminal. 524 * 525 * bugfix by Rich Salz <rsalz@PINEAPPLE.BBN.COM>: For root rsh things 526 * allways first check to see if loginsh or really root, then do things 527 * with ttyname() 528 * 529 * Also by Jean-Francois Lamy <lamy%ai.toronto.edu@RELAY.CS.NET>: check the 530 * value of cp before using it! ("root can rsh too") 531 * 532 * PWP: keep the nested ifs; the order of the tests matters and a good 533 * (smart) C compiler might re-arange things wrong. 534 */ 535#ifdef AUTOLOGOUT 536# ifdef convex 537 if (uid == 0) 538 /* root always has a 15 minute autologout */ 539 setcopy(STRautologout, STRrootdefautologout, VAR_READWRITE); 540 else 541 if (loginsh) 542 /* users get autologout set to 0 */ 543 setcopy(STRautologout, STR0, VAR_READWRITE); 544# else /* convex */ 545 if (loginsh || (uid == 0)) { 546 if (*cp) { 547 /* only for login shells or root and we must have a tty */ 548 if (((cp2 = Strrchr(cp, (Char) '/')) != NULL) && 549 (Strncmp(cp, STRptssl, 3) != 0)) { 550 cp2 = cp2 + 1; 551 } 552 else 553 cp2 = cp; 554 if (!(((Strncmp(cp2, STRtty, 3) == 0) && Isalpha(cp2[3])) || 555 Strstr(cp, STRptssl) != NULL)) { 556 if (getenv("DISPLAY") == NULL) { 557 /* NOT on X window shells */ 558 setcopy(STRautologout, STRdefautologout, VAR_READWRITE); 559 } 560 } 561 } 562 } 563# endif /* convex */ 564#endif /* AUTOLOGOUT */ 565 566 sigset_interrupting(SIGALRM, queue_alrmcatch); 567 568 setcopy(STRstatus, STR0, VAR_READWRITE); 569 570 /* 571 * get and set machine specific environment variables 572 */ 573 getmachine(); 574 575 576 /* 577 * Publish the selected echo style 578 */ 579#if ECHO_STYLE != BSD_ECHO 580 if (tcsh) { 581# if ECHO_STYLE == NONE_ECHO 582 setcopy(STRecho_style, STRnone, VAR_READWRITE); 583# endif /* ECHO_STYLE == NONE_ECHO */ 584# if ECHO_STYLE == SYSV_ECHO 585 setcopy(STRecho_style, STRsysv, VAR_READWRITE); 586# endif /* ECHO_STYLE == SYSV_ECHO */ 587# if ECHO_STYLE == BOTH_ECHO 588 setcopy(STRecho_style, STRboth, VAR_READWRITE); 589# endif /* ECHO_STYLE == BOTH_ECHO */ 590 } else 591#endif /* ECHO_STYLE != BSD_ECHO */ 592 setcopy(STRecho_style, STRbsd, VAR_READWRITE); 593 594 /* 595 * increment the shell level. 596 */ 597 shlvl(1); 598 599#ifdef __ANDROID__ 600 /* On Android, $HOME either isn't set or set to /data, a R/O location. 601 Check for the environment variable EXTERNAL_STORAGE, which contains 602 the mount point of the external storage (SD card, mostly). If 603 EXTERNAL_STORAGE isn't set fall back to "/sdcard". Eventually 604 override $HOME so the environment is on the same page. */ 605 if (((tcp = getenv("HOME")) != NULL && strcmp (tcp, "/data") != 0) 606 || (tcp = getenv("EXTERNAL_STORAGE")) != NULL) { 607 cp = quote(SAVE(tcp)); 608 } else 609 cp = quote(SAVE("/sdcard")); 610 tsetenv(STRKHOME, cp); 611#else 612 if ((tcp = getenv("HOME")) != NULL) 613 cp = quote(SAVE(tcp)); 614 else 615 cp = NULL; 616#endif 617 618 if (cp == NULL) 619 fast = 1; /* No home -> can't read scripts */ 620 else 621 setv(STRhome, cp, VAR_READWRITE); 622 623 dinit(cp); /* dinit thinks that HOME == cwd in a login 624 * shell */ 625 /* 626 * Grab other useful things from the environment. Should we grab 627 * everything?? 628 */ 629 { 630 char *cln, *cus, *cgr; 631 struct passwd *pw; 632 struct group *gr; 633 634 635#ifdef apollo 636 int oid = getoid(); 637 638 setv(STRoid, Itoa(oid, 0, 0), VAR_READWRITE); 639#endif /* apollo */ 640 641 setv(STReuid, Itoa(euid, 0, 0), VAR_READWRITE); 642 if ((pw = xgetpwuid(euid)) == NULL) 643 setcopy(STReuser, STRunknown, VAR_READWRITE); 644 else 645 setcopy(STReuser, str2short(pw->pw_name), VAR_READWRITE); 646 647 setv(STRuid, Itoa(uid, 0, 0), VAR_READWRITE); 648 649 setv(STRgid, Itoa(gid, 0, 0), VAR_READWRITE); 650 651 cln = getenv("LOGNAME"); 652 cus = getenv("USER"); 653 if (cus != NULL) 654 setv(STRuser, quote(SAVE(cus)), VAR_READWRITE); 655 else if (cln != NULL) 656 setv(STRuser, quote(SAVE(cln)), VAR_READWRITE); 657 else if ((pw = xgetpwuid(uid)) == NULL) 658 setcopy(STRuser, STRunknown, VAR_READWRITE); 659 else 660 setcopy(STRuser, str2short(pw->pw_name), VAR_READWRITE); 661 if (cln == NULL) 662 tsetenv(STRLOGNAME, varval(STRuser)); 663 if (cus == NULL) 664 tsetenv(STRKUSER, varval(STRuser)); 665 666 cgr = getenv("GROUP"); 667 if (cgr != NULL) 668 setv(STRgroup, quote(SAVE(cgr)), VAR_READWRITE); 669 else if ((gr = xgetgrgid(gid)) == NULL) 670 setcopy(STRgroup, STRunknown, VAR_READWRITE); 671 else 672 setcopy(STRgroup, str2short(gr->gr_name), VAR_READWRITE); 673 if (cgr == NULL) 674 tsetenv(STRKGROUP, varval(STRgroup)); 675 } 676 677 /* 678 * HOST may be wrong, since rexd transports the entire environment on sun 679 * 3.x Just set it again 680 */ 681 { 682 char cbuff[MAXHOSTNAMELEN]; 683 684 if (gethostname(cbuff, sizeof(cbuff)) >= 0) { 685 cbuff[sizeof(cbuff) - 1] = '\0'; /* just in case */ 686 tsetenv(STRHOST, str2short(cbuff)); 687 } 688 else 689 tsetenv(STRHOST, STRunknown); 690 } 691 692 693#ifdef REMOTEHOST 694 /* 695 * Try to determine the remote host we were logged in from. 696 */ 697 remotehost(); 698#endif /* REMOTEHOST */ 699 700#ifdef apollo 701 if ((tcp = getenv("SYSTYPE")) == NULL) 702 tcp = "bsd4.3"; 703 tsetenv(STRSYSTYPE, quote(str2short(tcp))); 704#endif /* apollo */ 705 706 /* 707 * set editing on by default, unless running under Emacs as an inferior 708 * shell. 709 * We try to do this intelligently. If $TERM is available, then it 710 * should determine if we should edit or not. $TERM is preserved 711 * across rlogin sessions, so we will not get confused if we rlogin 712 * under an emacs shell. Another advantage is that if we run an 713 * xterm under an emacs shell, then the $TERM will be set to 714 * xterm, so we are going to want to edit. Unfortunately emacs 715 * does not restore all the tty modes, so xterm is not very well 716 * set up. But this is not the shell's fault. 717 * Also don't edit if $TERM == wm, for when we're running under an ATK app. 718 * Finally, emacs compiled under terminfo, sets the terminal to dumb, 719 * so disable editing for that too. 720 * 721 * Unfortunately, in some cases the initial $TERM setting is "unknown", 722 * "dumb", or "network" which is then changed in the user's startup files. 723 * We fix this by setting noediting here if $TERM is unknown/dumb and 724 * if noediting is set, we switch on editing if $TERM is changed. 725 */ 726 if ((tcp = getenv("TERM")) != NULL) { 727 setv(STRterm, quote(SAVE(tcp)), VAR_READWRITE); 728 noediting = strcmp(tcp, "unknown") == 0 || strcmp(tcp, "dumb") == 0 || 729 strcmp(tcp, "network") == 0; 730 editing = strcmp(tcp, "emacs") != 0 && strcmp(tcp, "wm") != 0 && 731 !noediting; 732 } 733 else { 734 noediting = 0; 735 editing = ((tcp = getenv("EMACS")) == NULL || strcmp(tcp, "t") != 0); 736 } 737 738 /* 739 * The 'edit' variable is either set or unset. It doesn't 740 * need a value. Making it 'emacs' might be confusing. 741 */ 742 if (editing) 743 setNS(STRedit); 744 745 746 /* 747 * still more mutability: make the complete routine automatically add the 748 * suffix of file names... 749 */ 750 setNS(STRaddsuffix); 751 752 /* 753 * Compatibility with tcsh >= 6.12 by default 754 */ 755 setNS(STRcsubstnonl); 756 757 /* 758 * Random default kill ring size 759 */ 760 setcopy(STRkillring, str2short("30"), VAR_READWRITE); 761 762 /* 763 * Re-initialize path if set in environment 764 */ 765 if ((tcp = getenv("PATH")) == NULL) 766#ifdef _PATH_DEFPATH 767 importpath(str2short(_PATH_DEFPATH)); 768#else /* !_PATH_DEFPATH */ 769 setq(STRpath, defaultpath(), &shvhed, VAR_READWRITE); 770#endif /* _PATH_DEFPATH */ 771 else 772 /* Importpath() allocates memory for the path, and the 773 * returned pointer from SAVE() was discarded, so 774 * this was a memory leak.. (sg) 775 * 776 * importpath(SAVE(tcp)); 777 */ 778 importpath(str2short(tcp)); 779 780 781 { 782 /* If the SHELL environment variable ends with "tcsh", set 783 * STRshell to the same path. This is to facilitate using 784 * the executable in environments where the compiled-in 785 * default isn't appropriate (sg). 786 */ 787 788 size_t sh_len = 0; 789 790 if ((tcp = getenv("SHELL")) != NULL) { 791 sh_len = strlen(tcp); 792 if ((sh_len >= 5 && strcmp(tcp + (sh_len - 5), "/tcsh") == 0) || 793 (!tcsh && sh_len >= 4 && strcmp(tcp + (sh_len - 4), "/csh") == 0)) 794 setv(STRshell, quote(SAVE(tcp)), VAR_READWRITE); 795 else 796 sh_len = 0; 797 } 798 if (sh_len == 0) 799 setcopy(STRshell, STR_SHELLPATH, VAR_READWRITE); 800 } 801 802#ifdef _OSD_POSIX /* BS2000 needs this variable set to "SHELL" */ 803 if ((tcp = getenv("PROGRAM_ENVIRONMENT")) == NULL) 804 tcp = "SHELL"; 805 tsetenv(STRPROGRAM_ENVIRONMENT, quote(str2short(tcp))); 806#endif /* _OSD_POSIX */ 807 808#ifdef COLOR_LS_F 809 if ((tcp = getenv("LS_COLORS")) != NULL) 810 parseLS_COLORS(str2short(tcp)); 811 if ((tcp = getenv("LSCOLORS")) != NULL) 812 parseLSCOLORS(str2short(tcp)); 813#endif /* COLOR_LS_F */ 814 815 mainpid = getpid(); 816 doldol = putn((tcsh_number_t)mainpid); /* For $$ */ 817#ifdef WINNT_NATIVE 818 { 819 char *tmp; 820 Char *tmp2; 821 if ((tmp = getenv("TMP")) != NULL) { 822 tmp = xasprintf("%s/%s", tmp, "sh"); 823 tmp2 = SAVE(tmp); 824 xfree(tmp); 825 } 826 else { 827 tmp2 = SAVE(""); 828 } 829 shtemp = Strspl(tmp2, doldol); /* For << */ 830 xfree(tmp2); 831 } 832#else /* !WINNT_NATIVE */ 833#ifdef HAVE_MKSTEMP 834 { 835 const char *tmpdir = getenv ("TMPDIR"); 836 if (!tmpdir) 837 tmpdir = "/tmp"; 838 shtemp = Strspl(SAVE(tmpdir), SAVE("/sh" TMP_TEMPLATE)); /* For << */ 839 } 840#else /* !HAVE_MKSTEMP */ 841 shtemp = Strspl(STRtmpsh, doldol); /* For << */ 842#endif /* HAVE_MKSTEMP */ 843#endif /* WINNT_NATIVE */ 844 845 /* 846 * Record the interrupt states from the parent process. If the parent is 847 * non-interruptible our hand must be forced or we (and our children) won't 848 * be either. Our children inherit termination from our parent. We catch it 849 * only if we are the login shell. 850 */ 851 sigaction(SIGINT, NULL, &parintr); 852 sigaction(SIGTERM, NULL, &parterm); 853 854 855#ifdef TCF 856 /* Enable process migration on ourselves and our progeny */ 857 (void) signal(SIGMIGRATE, SIG_DFL); 858#endif /* TCF */ 859 860 /* 861 * dspkanji/dspmbyte autosetting 862 */ 863 /* PATCH IDEA FROM Issei.Suzuki VERY THANKS */ 864#if defined(DSPMBYTE) 865#if defined(NLS) && defined(LC_CTYPE) 866 if (((tcp = setlocale(LC_CTYPE, NULL)) != NULL || (tcp = getenv("LANG")) != NULL) && !adrof(CHECK_MBYTEVAR)) 867#else 868 if ((tcp = getenv("LANG")) != NULL && !adrof(CHECK_MBYTEVAR)) 869#endif 870 { 871 autoset_dspmbyte(str2short(tcp)); 872 } 873#if defined(WINNT_NATIVE) 874 else if (!adrof(CHECK_MBYTEVAR)) 875 nt_autoset_dspmbyte(); 876#endif /* WINNT_NATIVE */ 877#endif 878#if defined(AUTOSET_KANJI) 879# if defined(NLS) && defined(LC_CTYPE) 880 if (setlocale(LC_CTYPE, NULL) != NULL || getenv("LANG") != NULL) 881# else 882 if (getenv("LANG") != NULL) 883# endif 884 autoset_kanji(); 885#endif /* AUTOSET_KANJI */ 886 fix_version(); /* publish the shell version */ 887 888 if (argc > 1 && strcmp(argv[1], "--version") == 0) { 889 xprintf("%S\n", varval(STRversion)); 890 xexit(0); 891 } 892 if (argc > 1 && strcmp(argv[1], "--help") == 0) { 893 xprintf("%S\n\n", varval(STRversion)); 894 xprintf("%s", CGETS(11, 8, HELP_STRING)); 895 xexit(0); 896 } 897 /* 898 * Process the arguments. 899 * 900 * Note that processing of -v/-x is actually delayed till after script 901 * processing. 902 * 903 * We set the first character of our name to be '-' if we are a shell 904 * running interruptible commands. Many programs which examine ps'es 905 * use this to filter such shells out. 906 */ 907 argc--, tempv++; 908 while (argc > 0 && (tcp = tempv[0])[0] == '-' && 909 *++tcp != '\0' && !batch) { 910 do 911 switch (*tcp++) { 912 913 case 0: /* - Interruptible, no prompt */ 914 prompt = 0; 915 setintr = 1; 916 nofile = 1; 917 break; 918 919 case 'b': /* -b Next arg is input file */ 920 batch = 1; 921 break; 922 923 case 'c': /* -c Command input from arg */ 924 if (argc == 1) 925 xexit(0); 926 argc--, tempv++; 927#ifdef M_XENIX 928 /* Xenix Vi bug: 929 it relies on a 7 bit environment (/bin/sh), so it 930 pass ascii arguments with the 8th bit set */ 931 if (!strcmp(argv[0], "sh")) 932 { 933 char *p; 934 935 for (p = tempv[0]; *p; ++p) 936 *p &= ASCII; 937 } 938#endif 939 targinp = tempv[0]; 940 prompt = 0; 941 nofile = 1; 942 break; 943 case 'd': /* -d Load directory stack from file */ 944 rdirs = 1; 945 break; 946 947#ifdef apollo 948 case 'D': /* -D Define environment variable */ 949 { 950 Char *dp; 951 952 cp = str2short(tcp); 953 if (dp = Strchr(cp, '=')) { 954 *dp++ = '\0'; 955 tsetenv(cp, dp); 956 } 957 else 958 tsetenv(cp, STRNULL); 959 } 960 *tcp = '\0'; /* done with this argument */ 961 break; 962#endif /* apollo */ 963 964 case 'e': /* -e Exit on any error */ 965 exiterr = 1; 966 break; 967 968 case 'f': /* -f Fast start */ 969 fast = 1; 970 break; 971 972 case 'i': /* -i Interactive, even if !intty */ 973 intact = 1; 974 nofile = 1; 975 break; 976 977 case 'm': /* -m read .cshrc (from su) */ 978 mflag = 1; 979 break; 980 981 case 'n': /* -n Don't execute */ 982 noexec = 1; 983 break; 984 985 case 'q': /* -q (Undoc'd) ... die on quit */ 986 quitit = 1; 987 break; 988 989 case 's': /* -s Read from std input */ 990 nofile = 1; 991 break; 992 993 case 't': /* -t Read one line from input */ 994 onelflg = 2; 995 prompt = 0; 996 nofile = 1; 997 break; 998 999 case 'v': /* -v Echo hist expanded input */ 1000 nverbose = 1; /* ... later */ 1001 break; 1002 1003 case 'x': /* -x Echo just before execution */ 1004 nexececho = 1; /* ... later */ 1005 break; 1006 1007 case 'V': /* -V Echo hist expanded input */ 1008 setNS(STRverbose); /* NOW! */ 1009 break; 1010 1011 case 'X': /* -X Echo just before execution */ 1012 setNS(STRecho); /* NOW! */ 1013 break; 1014 1015 case 'F': 1016 /* 1017 * This will cause children to be created using fork instead of 1018 * vfork. 1019 */ 1020 use_fork = 1; 1021 break; 1022 1023 case ' ': 1024 case '\t': 1025 case '\r': 1026 case '\n': 1027 /* 1028 * for O/S's that don't do the argument parsing right in 1029 * "#!/foo -f " scripts 1030 */ 1031 break; 1032 1033 default: /* Unknown command option */ 1034 exiterr = 1; 1035 stderror(ERR_TCSHUSAGE, tcp-1, progname); 1036 break; 1037 1038 } while (*tcp); 1039 tempv++, argc--; 1040 } 1041 1042 if (quitit) /* With all due haste, for debugging */ 1043 (void) signal(SIGQUIT, SIG_DFL); 1044 1045 /* 1046 * Unless prevented by -, -c, -i, -s, or -t, if there are remaining 1047 * arguments the first of them is the name of a shell file from which to 1048 * read commands. 1049 */ 1050 if (nofile == 0 && argc > 0) { 1051 nofile = xopen(tempv[0], O_RDONLY|O_LARGEFILE); 1052 if (nofile < 0) { 1053 child = 1; /* So this ... */ 1054 /* ... doesn't return */ 1055 stderror(ERR_SYSTEM, tempv[0], strerror(errno)); 1056 } 1057 xfree(ffile); 1058 dolzero = 1; 1059 ffile = SAVE(tempv[0]); 1060 /* 1061 * Replace FSHIN. Handle /dev/std{in,out,err} specially 1062 * since once they are closed we cannot open them again. 1063 * In that case we use our own saved descriptors 1064 */ 1065 if ((SHIN = dmove(nofile, FSHIN)) < 0) 1066 switch(nofile) { 1067 case 0: 1068 SHIN = FSHIN; 1069 break; 1070 case 1: 1071 SHIN = FSHOUT; 1072 break; 1073 case 2: 1074 SHIN = FSHDIAG; 1075 break; 1076 default: 1077 stderror(ERR_SYSTEM, tempv[0], strerror(errno)); 1078 break; 1079 } 1080 (void) close_on_exec(SHIN, 1); 1081 prompt = 0; 1082 /* argc not used any more */ tempv++; 1083 } 1084 1085 /* 1086 * Call to closem() used to be part of initdesc(). Now called below where 1087 * the script name argument has become stdin. Kernel may have used a file 1088 * descriptor to hold the name of the script (setuid case) and this name 1089 * mustn't be lost by closing the fd too soon. 1090 */ 1091 closem(); 1092 1093 /* 1094 * Consider input a tty if it really is or we are interactive. but not for 1095 * editing (christos) 1096 */ 1097 if (!(intty = isatty(SHIN))) { 1098 if (adrof(STRedit)) 1099 unsetv(STRedit); 1100 editing = 0; 1101 } 1102 intty |= intact; 1103#ifndef convex 1104 if (intty || (intact && isatty(SHOUT))) { 1105 if (!batch && (uid != euid || gid != egid)) { 1106 errno = EACCES; 1107 child = 1; /* So this ... */ 1108 /* ... doesn't return */ 1109 stderror(ERR_SYSTEM, progname, strerror(errno)); 1110 } 1111 } 1112#endif /* convex */ 1113 isoutatty = isatty(SHOUT); 1114 isdiagatty = isatty(SHDIAG); 1115 /* 1116 * Decide whether we should play with signals or not. If we are explicitly 1117 * told (via -i, or -) or we are a login shell (arg0 starts with -) or the 1118 * input and output are both the ttys("csh", or "csh</dev/ttyx>/dev/ttyx") 1119 * Note that in only the login shell is it likely that parent may have set 1120 * signals to be ignored 1121 */ 1122 if (loginsh || intact || (intty && isatty(SHOUT))) 1123 setintr = 1; 1124 settell(); 1125 /* 1126 * Save the remaining arguments in argv. 1127 */ 1128 setq(STRargv, blk2short(tempv), &shvhed, VAR_READWRITE); 1129 1130 /* 1131 * Set up the prompt. 1132 */ 1133 if (prompt) { 1134 setcopy(STRprompt, STRdefprompt, VAR_READWRITE); 1135 /* that's a meta-questionmark */ 1136 setcopy(STRprompt2, STRmquestion, VAR_READWRITE); 1137 setcopy(STRprompt3, STRKCORRECT, VAR_READWRITE); 1138 } 1139 1140 /* 1141 * If we are an interactive shell, then start fiddling with the signals; 1142 * this is a tricky game. 1143 */ 1144 shpgrp = mygetpgrp(); 1145 opgrp = tpgrp = -1; 1146 if (setintr) { 1147 struct sigaction osig; 1148 1149 **argv = '-'; 1150 if (!quitit) /* Wary! */ 1151 (void) signal(SIGQUIT, SIG_IGN); 1152 pintr_disabled = 1; 1153 sigset_interrupting(SIGINT, queue_pintr); 1154 (void) signal(SIGTERM, SIG_IGN); 1155 1156 /* 1157 * No reason I can see not to save history on all these events.. 1158 * Most usual occurrence is in a window system, where we're not a login 1159 * shell, but might as well be... (sg) 1160 * But there might be races when lots of shells exit together... 1161 * [this is also incompatible]. 1162 * We have to be mre careful here. If the parent wants to 1163 * ignore the signals then we leave them untouched... 1164 * We also only setup the handlers for shells that are trully 1165 * interactive. 1166 */ 1167 sigaction(SIGHUP, NULL, &osig); 1168 if (loginsh || osig.sa_handler != SIG_IGN) 1169 /* exit processing on HUP */ 1170 sigset_interrupting(SIGHUP, queue_phup); 1171#ifdef SIGXCPU 1172 sigaction(SIGXCPU, NULL, &osig); 1173 if (loginsh || osig.sa_handler != SIG_IGN) 1174 /* exit processing on XCPU */ 1175 sigset_interrupting(SIGXCPU, queue_phup); 1176#endif 1177#ifdef SIGXFSZ 1178 sigaction(SIGXFSZ, NULL, &osig); 1179 if (loginsh || osig.sa_handler != SIG_IGN) 1180 /* exit processing on XFSZ */ 1181 sigset_interrupting(SIGXFSZ, queue_phup); 1182#endif 1183 1184 if (quitit == 0 && targinp == 0) { 1185#ifdef SIGTSTP 1186 (void) signal(SIGTSTP, SIG_IGN); 1187#endif 1188#ifdef SIGTTIN 1189 (void) signal(SIGTTIN, SIG_IGN); 1190#endif 1191#ifdef SIGTTOU 1192 (void) signal(SIGTTOU, SIG_IGN); 1193#endif 1194 /* 1195 * Wait till in foreground, in case someone stupidly runs csh & 1196 * dont want to try to grab away the tty. 1197 */ 1198 if (isatty(FSHDIAG)) 1199 f = FSHDIAG; 1200 else if (isatty(FSHOUT)) 1201 f = FSHOUT; 1202 else if (isatty(OLDSTD)) 1203 f = OLDSTD; 1204 else 1205 f = -1; 1206 1207#ifdef NeXT 1208 /* NeXT 2.0 /usr/etc/rlogind, does not set our process group! */ 1209 if (f != -1 && shpgrp == 0) { 1210 shpgrp = getpid(); 1211 (void) setpgid(0, shpgrp); 1212 (void) tcsetpgrp(f, shpgrp); 1213 } 1214#endif /* NeXT */ 1215#ifdef BSDJOBS /* if we have tty job control */ 1216 if (f != -1 && grabpgrp(f, shpgrp) != -1) { 1217 /* 1218 * Thanks to Matt Day for the POSIX references, and to 1219 * Paul Close for the SGI clarification. 1220 */ 1221 if (setdisc(f) != -1) { 1222 opgrp = shpgrp; 1223 shpgrp = getpid(); 1224 tpgrp = shpgrp; 1225 if (tcsetpgrp(f, shpgrp) == -1) { 1226 /* 1227 * On hpux 7.03 this fails with EPERM. This happens on 1228 * the 800 when opgrp != shpgrp at this point. (we were 1229 * forked from a non job control shell) 1230 * POSIX 7.2.4, says we failed because the process 1231 * group specified did not belong to a process 1232 * in the same session with the tty. So we set our 1233 * process group and try again. 1234 */ 1235 if (setpgid(0, shpgrp) == -1) { 1236 xprintf("setpgid:"); 1237 goto notty; 1238 } 1239 if (tcsetpgrp(f, shpgrp) == -1) { 1240 xprintf("tcsetpgrp:"); 1241 goto notty; 1242 } 1243 } 1244 /* 1245 * We check the process group now. If it is the same, then 1246 * we don't need to set it again. On hpux 7.0 on the 300's 1247 * if we set it again it fails with EPERM. This is the 1248 * correct behavior according to POSIX 4.3.3 if the process 1249 * was a session leader . 1250 */ 1251 else if (shpgrp != mygetpgrp()) { 1252 if (setpgid(0, shpgrp) == -1) { 1253 xprintf("setpgid:"); 1254 goto notty; 1255 } 1256 } 1257#ifdef IRIS4D 1258 /* 1259 * But on irix 3.3 we need to set it again, even if it is 1260 * the same. We do that to tell the system that we 1261 * need BSD process group compatibility. 1262 */ 1263 else 1264 (void) setpgid(0, shpgrp); 1265#endif 1266 (void) close_on_exec(dcopy(f, FSHTTY), 1); 1267 } 1268 else 1269 tpgrp = -1; 1270 } 1271 if (tpgrp == -1) { 1272 notty: 1273 xprintf(CGETS(11, 1, "Warning: no access to tty (%s).\n"), 1274 strerror(errno)); 1275 xprintf("%s", 1276 CGETS(11, 2, "Thus no job control in this shell.\n")); 1277 /* 1278 * Fix from:Sakari Jalovaara <sja@sirius.hut.fi> if we don't 1279 * have access to tty, disable editing too 1280 */ 1281 if (adrof(STRedit)) 1282 unsetv(STRedit); 1283 editing = 0; 1284 } 1285#else /* BSDJOBS */ /* don't have job control, so frotz it */ 1286 tpgrp = -1; 1287#endif /* BSDJOBS */ 1288 } 1289 } 1290 if (setintr == 0 && parintr.sa_handler == SIG_DFL) 1291 setintr = 1; 1292 1293/* 1294 * SVR4 doesn't send a SIGCHLD when a child is stopped or continued if the 1295 * handler is installed with signal(2) or sigset(2). sigaction(2) must 1296 * be used instead. 1297 * 1298 * David Dawes (dawes@physics.su.oz.au) Sept 1991 1299 */ 1300 sigset_interrupting(SIGCHLD, queue_pchild); 1301 1302 if (intty && !targinp) 1303 (void) ed_Setup(editing);/* Get the tty state, and set defaults */ 1304 /* Only alter the tty state if editing */ 1305 1306 /* 1307 * Set an exit here in case of an interrupt or error reading the shell 1308 * start-up scripts. 1309 */ 1310 osetintr = setintr; 1311 oparintr = parintr; 1312 (void)cleanup_push_mark(); /* There is no outer handler */ 1313 if (setexit() != 0) /* PWP */ 1314 reenter = 1; 1315 else 1316 reenter = 0; 1317 exitset++; 1318 haderr = 0; /* In case second time through */ 1319 if (!fast && reenter == 0) { 1320 /* Will have varval(STRhome) here because set fast if don't */ 1321 { 1322 pintr_disabled++; 1323 cleanup_push(&pintr_disabled, disabled_cleanup); 1324 setintr = 0;/*FIXRESET:cleanup*/ 1325 /* onintr in /etc/ files has no effect */ 1326 parintr.sa_handler = SIG_IGN;/*FIXRESET: cleanup*/ 1327#ifdef LOGINFIRST 1328#ifdef _PATH_DOTLOGIN 1329 if (loginsh) 1330 (void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL); 1331#endif 1332#endif 1333 1334#ifdef _PATH_DOTCSHRC 1335 (void) srcfile(_PATH_DOTCSHRC, 0, 0, NULL); 1336#endif 1337 if (!targinp && !onelflg && !havhash) 1338 dohash(NULL,NULL); 1339#ifndef LOGINFIRST 1340#ifdef _PATH_DOTLOGIN 1341 if (loginsh) 1342 (void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL); 1343#endif 1344#endif 1345 cleanup_until(&pintr_disabled); 1346 setintr = osetintr; 1347 parintr = oparintr; 1348 } 1349#ifdef LOGINFIRST 1350 if (loginsh) 1351 (void) srccat(varval(STRhome), STRsldotlogin); 1352#endif 1353 /* upward compat. */ 1354 if (!srccat(varval(STRhome), STRsldottcshrc)) 1355 (void) srccat(varval(STRhome), STRsldotcshrc); 1356 1357 if (!targinp && !onelflg && !havhash) 1358 dohash(NULL,NULL); 1359 1360 /* 1361 * Source history before .login so that it is available in .login 1362 */ 1363 loadhist(NULL, 0); 1364#ifndef LOGINFIRST 1365 if (loginsh) 1366 (void) srccat(varval(STRhome), STRsldotlogin); 1367#endif 1368 if (loginsh || rdirs) 1369 loaddirs(NULL); 1370 } 1371 /* Reset interrupt flag */ 1372 setintr = osetintr; 1373 parintr = oparintr; 1374 exitset--; 1375 1376 /* Initing AFTER .cshrc is the Right Way */ 1377 if (intty && !targinp) { /* PWP setup stuff */ 1378 ed_Init(); /* init the new line editor */ 1379#ifdef SIG_WINDOW 1380 check_window_size(1); /* mung environment */ 1381#endif /* SIG_WINDOW */ 1382 } 1383 1384 /* 1385 * Now are ready for the -v and -x flags 1386 */ 1387 if (nverbose) 1388 setNS(STRverbose); 1389 if (nexececho) 1390 setNS(STRecho); 1391 1392 1393 if (targinp) { 1394 /* If this -c command caused an error before, skip processing */ 1395 if (reenter && arginp) { 1396 exitcode = 1; 1397 goto done; 1398 } 1399 1400 arginp = SAVE(targinp); 1401 /* 1402 * we put the command into a variable 1403 */ 1404 if (arginp != NULL) 1405 setv(STRcommand, quote(Strsave(arginp)), VAR_READWRITE); 1406 1407 /* 1408 * * Give an error on -c arguments that end in * backslash to 1409 * ensure that you don't make * nonportable csh scripts. 1410 */ 1411 { 1412 int count; 1413 1414 cp = Strend(arginp); 1415 count = 0; 1416 while (cp > arginp && *--cp == '\\') 1417 ++count; 1418 if ((count & 1) != 0) { 1419 exiterr = 1; 1420 stderror(ERR_ARGC); 1421 } 1422 } 1423 } 1424 /* 1425 * All the rest of the world is inside this call. The argument to process 1426 * indicates whether it should catch "error unwinds". Thus if we are a 1427 * interactive shell our call here will never return by being blown past on 1428 * an error. 1429 */ 1430 process(setintr); 1431 1432done: 1433 /* 1434 * Mop-up. 1435 */ 1436 /* Take care of these (especially HUP) here instead of inside flush. */ 1437 handle_pending_signals(); 1438 if (intty) { 1439 if (loginsh) { 1440 xprintf("logout\n"); 1441 xclose(SHIN); 1442 child = 1; 1443#ifdef TESLA 1444 do_logout = 1; 1445#endif /* TESLA */ 1446 goodbye(NULL, NULL); 1447 } 1448 else { 1449 xprintf("exit\n"); 1450 } 1451 } 1452 record(); 1453 exitstat(); 1454 return exitcode; 1455} 1456 1457void 1458untty(void) 1459{ 1460#ifdef BSDJOBS 1461 if (tpgrp > 0 && opgrp != shpgrp) { 1462 (void) setpgid(0, opgrp); 1463 (void) tcsetpgrp(FSHTTY, opgrp); 1464 (void) resetdisc(FSHTTY); 1465 } 1466#endif /* BSDJOBS */ 1467} 1468 1469void 1470importpath(Char *cp) 1471{ 1472 size_t i = 0; 1473 Char *dp; 1474 Char **pv; 1475 int c; 1476 1477 for (dp = cp; *dp; dp++) 1478 if (*dp == PATHSEP) 1479 i++; 1480 /* 1481 * i+2 where i is the number of colons in the path. There are i+1 1482 * directories in the path plus we need room for a zero terminator. 1483 */ 1484 pv = xcalloc(i + 2, sizeof(Char *)); 1485 dp = cp; 1486 i = 0; 1487 if (*dp) 1488 for (;;) { 1489 if ((c = *dp) == PATHSEP || c == 0) { 1490 *dp = 0; 1491 pv[i++] = Strsave(*cp ? cp : STRdot); 1492 if (c) { 1493 cp = dp + 1; 1494 *dp = PATHSEP; 1495 } 1496 else 1497 break; 1498 } 1499#ifdef WINNT_NATIVE 1500 else if (*dp == '\\') 1501 *dp = '/'; 1502#endif /* WINNT_NATIVE */ 1503 dp++; 1504 } 1505 pv[i] = 0; 1506 cleanup_push(pv, blk_cleanup); 1507 setq(STRpath, pv, &shvhed, VAR_READWRITE); 1508 cleanup_ignore(pv); 1509 cleanup_until(pv); 1510} 1511 1512/* 1513 * Source to the file which is the catenation of the argument names. 1514 */ 1515static int 1516srccat(Char *cp, Char *dp) 1517{ 1518 if (cp[0] == '/' && cp[1] == '\0') 1519 return srcfile(short2str(dp), (mflag ? 0 : 1), 0, NULL); 1520 else { 1521 Char *ep; 1522 char *ptr; 1523 int rv; 1524 1525#ifdef WINNT_NATIVE 1526 ep = Strend(cp); 1527 if (ep != cp && ep[-1] == '/' && dp[0] == '/') /* silly win95 */ 1528 dp++; 1529#endif /* WINNT_NATIVE */ 1530 1531 ep = Strspl(cp, dp); 1532 cleanup_push(ep, xfree); 1533 ptr = short2str(ep); 1534 1535 rv = srcfile(ptr, (mflag ? 0 : 1), 0, NULL); 1536 cleanup_until(ep); 1537 return rv; 1538 } 1539} 1540 1541/* 1542 * Source to a file putting the file descriptor in a safe place (> 2). 1543 */ 1544#ifndef WINNT_NATIVE 1545static int 1546#else 1547int 1548#endif /*WINNT_NATIVE*/ 1549srcfile(const char *f, int onlyown, int flag, Char **av) 1550{ 1551 int unit; 1552 1553 if ((unit = xopen(f, O_RDONLY|O_LARGEFILE)) == -1) 1554 return 0; 1555 cleanup_push(&unit, open_cleanup); 1556 unit = dmove(unit, -1); 1557 cleanup_ignore(&unit); 1558 cleanup_until(&unit); 1559 1560 (void) close_on_exec(unit, 1); 1561 srcunit(unit, onlyown, flag, av); 1562 return 1; 1563} 1564 1565 1566/* 1567 * Save the shell state, and establish new argument vector, and new input 1568 * fd. 1569 */ 1570static void 1571st_save(struct saved_state *st, int unit, int hflg, Char **al, Char **av) 1572{ 1573 st->insource = insource; 1574 st->SHIN = SHIN; 1575 /* Want to preserve the meaning of "source file >output". 1576 * Save old descriptors, move new 0,1,2 to safe places and assign 1577 * them to SH* and let process() redo 0,1,2 from them. 1578 * 1579 * The macro returns true if d1 and d2 are good and they point to 1580 * different things. If you don't avoid saving duplicate 1581 * descriptors, you really limit the depth of "source" recursion 1582 * you can do because of all the open file descriptors. -IAN! 1583 */ 1584#define NEED_SAVE_FD(d1,d2) \ 1585 (fstat(d1, &s1) != -1 && fstat(d2, &s2) != -1 \ 1586 && (s1.st_ino != s2.st_ino || s1.st_dev != s2.st_dev) ) 1587 1588 st->OLDSTD = st->SHOUT = st->SHDIAG = -1;/* test later to restore these */ 1589 if (didfds) { 1590 struct stat s1, s2; 1591 if (NEED_SAVE_FD(0,OLDSTD)) { 1592 st->OLDSTD = OLDSTD; 1593 OLDSTD = dmove(0, -1); 1594 (void)close_on_exec(OLDSTD, 1); 1595 } 1596 if (NEED_SAVE_FD(1,SHOUT)) { 1597 st->SHOUT = SHOUT; 1598 SHOUT = dmove(1, -1); 1599 (void)close_on_exec(SHOUT, 1); 1600 } 1601 if (NEED_SAVE_FD(2,SHDIAG)) { 1602 st->SHDIAG = SHDIAG; 1603 SHDIAG = dmove(2, -1); 1604 (void)close_on_exec(SHDIAG, 1); 1605 } 1606 donefds(); 1607 } 1608 1609 st->intty = intty; 1610 st->whyles = whyles; 1611 st->gointr = gointr; 1612 st->arginp = arginp; 1613 st->evalp = evalp; 1614 st->evalvec = evalvec; 1615 st->alvecp = alvecp; 1616 st->alvec = alvec; 1617 st->onelflg = onelflg; 1618 st->enterhist = enterhist; 1619 st->justpr = justpr; 1620 if (hflg) 1621 st->HIST = HIST; 1622 else 1623 st->HIST = '\0'; 1624 st->cantell = cantell; 1625 cpybin(st->B, B); 1626 1627 /* 1628 * we can now pass arguments to source. 1629 * For compatibility we do that only if arguments were really 1630 * passed, otherwise we keep the old, global $argv like before. 1631 */ 1632 if (av != NULL && *av != NULL) { 1633 struct varent *vp; 1634 if ((vp = adrof(STRargv)) != NULL && vp->vec != NULL) 1635 st->argv = saveblk(vp->vec); 1636 else 1637 st->argv = NULL; 1638 setq(STRargv, saveblk(av), &shvhed, VAR_READWRITE); 1639 } 1640 else 1641 st->argv = NULL; 1642 st->av = av; 1643 1644 SHIN = unit; /* Do this first */ 1645 1646 /* Establish new input arena */ 1647 { 1648 fbuf = NULL; 1649 fseekp = feobp = fblocks = 0; 1650 settell(); 1651 } 1652 1653 arginp = 0; 1654 onelflg = 0; 1655 intty = isatty(SHIN); 1656 whyles = 0; 1657 gointr = 0; 1658 evalvec = 0; 1659 evalp = 0; 1660 alvec = al; 1661 alvecp = 0; 1662 enterhist = hflg; 1663 if (enterhist) 1664 HIST = '\0'; 1665 insource = 1; 1666} 1667 1668 1669/* 1670 * Restore the shell to a saved state 1671 */ 1672static void 1673st_restore(void *xst) 1674{ 1675 struct saved_state *st; 1676 1677 st = xst; 1678 if (st->SHIN == -1) 1679 return; 1680 1681 /* Reset input arena */ 1682 { 1683 int i; 1684 Char** nfbuf = fbuf; 1685 int nfblocks = fblocks; 1686 1687 fblocks = 0; 1688 fbuf = NULL; 1689 for (i = 0; i < nfblocks; i++) 1690 xfree(nfbuf[i]); 1691 xfree(nfbuf); 1692 } 1693 cpybin(B, st->B); 1694 1695 xclose(SHIN); 1696 1697 insource = st->insource; 1698 SHIN = st->SHIN; 1699 if (st->OLDSTD != -1) 1700 xclose(OLDSTD), OLDSTD = st->OLDSTD; 1701 if (st->SHOUT != -1) 1702 xclose(SHOUT), SHOUT = st->SHOUT; 1703 if (st->SHDIAG != -1) 1704 xclose(SHDIAG), SHDIAG = st->SHDIAG; 1705 arginp = st->arginp; 1706 onelflg = st->onelflg; 1707 evalp = st->evalp; 1708 evalvec = st->evalvec; 1709 alvecp = st->alvecp; 1710 alvec = st->alvec; 1711 intty = st->intty; 1712 whyles = st->whyles; 1713 gointr = st->gointr; 1714 if (st->HIST != '\0') 1715 HIST = st->HIST; 1716 enterhist = st->enterhist; 1717 cantell = st->cantell; 1718 justpr = st->justpr; 1719 1720 if (st->argv != NULL) 1721 setq(STRargv, st->argv, &shvhed, VAR_READWRITE); 1722 else if (st->av != NULL && *st->av != NULL && adrof(STRargv) != NULL) 1723 unsetv(STRargv); 1724} 1725 1726/* 1727 * Source to a unit. If onlyown it must be our file or our group or 1728 * we don't chance it. This occurs on ".cshrc"s and the like. 1729 */ 1730static void 1731srcunit(int unit, int onlyown, int hflg, Char **av) 1732{ 1733 struct saved_state st; 1734 1735 st.SHIN = -1; /* st_restore checks this */ 1736 1737 if (unit < 0) 1738 return; 1739 1740 if (onlyown) { 1741 struct stat stb; 1742 1743 if (fstat(unit, &stb) < 0) { 1744 xclose(unit); 1745 return; 1746 } 1747 } 1748 1749 /* Does nothing before st_save() because st.SHIN == -1 */ 1750 cleanup_push(&st, st_restore); 1751 if (setintr) { 1752 pintr_disabled++; 1753 cleanup_push(&pintr_disabled, disabled_cleanup); 1754 } 1755 1756 /* Save the current state and move us to a new state */ 1757 st_save(&st, unit, hflg, NULL, av); 1758 1759 /* 1760 * Now if we are allowing commands to be interrupted, we let ourselves be 1761 * interrupted. 1762 */ 1763 if (setintr) { 1764 cleanup_until(&pintr_disabled); 1765 pintr_disabled++; 1766 cleanup_push(&pintr_disabled, disabled_cleanup); 1767 } 1768 1769 process(0); /* 0 -> blow away on errors */ 1770 1771 /* Restore the old state */ 1772 cleanup_until(&st); 1773} 1774 1775 1776/*ARGSUSED*/ 1777void 1778goodbye(Char **v, struct command *c) 1779{ 1780 USE(v); 1781 USE(c); 1782 record(); 1783 1784 if (loginsh) { 1785 size_t omark; 1786 sigset_t set; 1787 1788 sigemptyset(&set); 1789 signal(SIGQUIT, SIG_IGN); 1790 sigaddset(&set, SIGQUIT); 1791 sigprocmask(SIG_UNBLOCK, &set, NULL); 1792 signal(SIGINT, SIG_IGN); 1793 sigaddset(&set, SIGINT); 1794 signal(SIGTERM, SIG_IGN); 1795 sigaddset(&set, SIGTERM); 1796 signal(SIGHUP, SIG_IGN); 1797 sigaddset(&set, SIGHUP); 1798 sigprocmask(SIG_UNBLOCK, &set, NULL); 1799 phup_disabled = 1; 1800 setintr = 0; /* No interrupts after "logout" */ 1801 /* Trap errors inside .logout */ 1802 omark = cleanup_push_mark(); 1803 if (setexit() == 0) { 1804 if (!(adrof(STRlogout))) 1805 setcopy(STRlogout, STRnormal, VAR_READWRITE); 1806#ifdef _PATH_DOTLOGOUT 1807 (void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL); 1808#endif 1809 if (adrof(STRhome)) 1810 (void) srccat(varval(STRhome), STRsldtlogout); 1811#ifdef TESLA 1812 do_logout = 1; 1813#endif /* TESLA */ 1814 } 1815 cleanup_pop_mark(omark); 1816 } 1817 exitstat(); 1818} 1819 1820void 1821exitstat(void) 1822{ 1823#ifdef PROF 1824 _mcleanup(); 1825#endif 1826 /* 1827 * Note that if STATUS is corrupted (i.e. getn bombs) then error will exit 1828 * directly because we poke child here. Otherwise we might continue 1829 * unwarrantedly (sic). 1830 */ 1831 child = 1; 1832 1833 xexit(getn(varval(STRstatus))); 1834} 1835 1836/* 1837 * in the event of a HUP we want to save the history 1838 */ 1839void 1840phup(void) 1841{ 1842 static int again = 0; 1843 if (again++) 1844 return; 1845 1846 if (loginsh) { 1847 setcopy(STRlogout, STRhangup, VAR_READWRITE); 1848#ifdef _PATH_DOTLOGOUT 1849 (void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL); 1850#endif 1851 if (adrof(STRhome)) 1852 (void) srccat(varval(STRhome), STRsldtlogout); 1853 } 1854 1855 record(); 1856 1857#ifdef POSIXJOBS 1858 /* 1859 * We kill the last foreground process group. It then becomes 1860 * responsible to propagate the SIGHUP to its progeny. 1861 */ 1862 { 1863 struct process *pp, *np; 1864 1865 for (pp = proclist.p_next; pp; pp = pp->p_next) { 1866 np = pp; 1867 /* 1868 * Find if this job is in the foreground. It could be that 1869 * the process leader has exited and the foreground flag 1870 * is cleared for it. 1871 */ 1872 do 1873 /* 1874 * If a process is in the foreground we try to kill 1875 * it's process group. If we succeed, then the 1876 * whole job is gone. Otherwise we keep going... 1877 * But avoid sending HUP to the shell again. 1878 */ 1879 if (((np->p_flags & PFOREGND) != 0) && np->p_jobid != shpgrp) { 1880 np->p_flags &= ~PHUP; 1881 if (killpg(np->p_jobid, SIGHUP) != -1) { 1882 /* In case the job was suspended... */ 1883#ifdef SIGCONT 1884 (void) killpg(np->p_jobid, SIGCONT); 1885#endif 1886 break; 1887 } 1888 } 1889 while ((np = np->p_friends) != pp); 1890 } 1891 } 1892#endif /* POSIXJOBS */ 1893 1894 xexit(SIGHUP); 1895} 1896 1897static Char *jobargv[2] = {STRjobs, 0}; 1898 1899/* 1900 * Catch an interrupt, e.g. during lexical input. 1901 * If we are an interactive shell, we reset the interrupt catch 1902 * immediately. In any case we drain the shell output, 1903 * and finally go through the normal error mechanism, which 1904 * gets a chance to make the shell go away. 1905 */ 1906int just_signaled; /* bugfix by Michael Bloom (mg@ttidca.TTI.COM) */ 1907 1908void 1909pintr(void) 1910{ 1911 just_signaled = 1; 1912 pintr1(1); 1913} 1914 1915void 1916pintr1(int wantnl) 1917{ 1918 if (setintr) { 1919 if (pjobs) { 1920 pjobs = 0; 1921 xputchar('\n'); 1922 dojobs(jobargv, NULL); 1923 stderror(ERR_NAME | ERR_INTR); 1924 } 1925 } 1926 /* MH - handle interrupted completions specially */ 1927 { 1928 if (InsideCompletion) 1929 stderror(ERR_SILENT); 1930 } 1931 /* JV - Make sure we shut off inputl */ 1932 { 1933 (void) Cookedmode(); 1934 GettingInput = 0; 1935 if (evalvec) 1936 doneinp = 1; 1937 } 1938 drainoline(); 1939#ifdef HAVE_GETPWENT 1940 (void) endpwent(); 1941#endif 1942 1943 /* 1944 * If we have an active "onintr" then we search for the label. Note that if 1945 * one does "onintr -" then we shan't be interruptible so we needn't worry 1946 * about that here. 1947 */ 1948 if (gointr) { 1949 gotolab(gointr); 1950 reset(); 1951 } 1952 else if (intty && wantnl) { 1953 if (editing) { 1954 /* 1955 * If we are editing a multi-line input command, and move to 1956 * the beginning of the line, we don't want to trash it when 1957 * we hit ^C 1958 */ 1959 PastBottom(); 1960 ClearLines(); 1961 ClearDisp(); 1962 } 1963 else { 1964 /* xputchar('\n'); *//* Some like this, others don't */ 1965 (void) putraw('\r'); 1966 (void) putraw('\n'); 1967 } 1968 } 1969 stderror(ERR_SILENT); 1970} 1971 1972/* 1973 * Process is the main driving routine for the shell. 1974 * It runs all command processing, except for those within { ... } 1975 * in expressions (which is run by a routine evalav in sh.exp.c which 1976 * is a stripped down process), and `...` evaluation which is run 1977 * also by a subset of this code in sh.glob.c in the routine backeval. 1978 * 1979 * The code here is a little strange because part of it is interruptible 1980 * and hence freeing of structures appears to occur when none is necessary 1981 * if this is ignored. 1982 * 1983 * Note that if catch is not set then we will unwind on any error. 1984 * If an end-of-file occurs, we return. 1985 */ 1986void 1987process(int catch) 1988{ 1989 jmp_buf_t osetexit; 1990 /* PWP: This might get nuked by longjmp so don't make it a register var */ 1991 size_t omark; 1992 volatile int didexitset = 0; 1993 1994 getexit(osetexit); 1995 omark = cleanup_push_mark(); 1996 for (;;) { 1997 struct command *t; 1998 int hadhist, old_pintr_disabled; 1999 2000 (void)setexit(); 2001 if (didexitset == 0) { 2002 exitset++; 2003 didexitset++; 2004 } 2005 pendjob(); 2006 2007 justpr = enterhist; /* execute if not entering history */ 2008 2009 if (haderr) { 2010 if (!catch) { 2011 /* unwind */ 2012 doneinp = 0; 2013 cleanup_pop_mark(omark); 2014 resexit(osetexit); 2015 reset(); 2016 } 2017 haderr = 0; 2018 /* 2019 * Every error is eventually caught here or the shell dies. It is 2020 * at this point that we clean up any left-over open files, by 2021 * closing all but a fixed number of pre-defined files. Thus 2022 * routines don't have to worry about leaving files open due to 2023 * deeper errors... they will get closed here. 2024 */ 2025 closem(); 2026 continue; 2027 } 2028 if (doneinp) { 2029 doneinp = 0; 2030 break; 2031 } 2032 if (chkstop) 2033 chkstop--; 2034 if (neednote) 2035 pnote(); 2036 if (intty && prompt && evalvec == 0) { 2037 just_signaled = 0; 2038 mailchk(); 2039 /* 2040 * Watch for logins/logouts. Next is scheduled commands stored 2041 * previously using "sched." Then execute periodic commands. 2042 * Following that, the prompt precmd is run. 2043 */ 2044#ifndef HAVENOUTMP 2045 watch_login(0); 2046#endif /* !HAVENOUTMP */ 2047 sched_run(); 2048 period_cmd(); 2049 precmd(); 2050 /* 2051 * If we are at the end of the input buffer then we are going to 2052 * read fresh stuff. Otherwise, we are rereading input and don't 2053 * need or want to prompt. 2054 */ 2055 if (fseekp == feobp && aret == TCSH_F_SEEK) 2056 printprompt(0, NULL); 2057 flush(); 2058 setalarm(1); 2059 } 2060 if (seterr) { 2061 xfree(seterr); 2062 seterr = NULL; 2063 } 2064 2065 /* 2066 * Interruptible during interactive reads 2067 */ 2068 if (setintr) 2069 pintr_push_enable(&old_pintr_disabled); 2070 freelex(¶ml); 2071 hadhist = lex(¶ml); 2072 if (setintr) 2073 cleanup_until(&old_pintr_disabled); 2074 cleanup_push(¶ml, lex_cleanup); 2075 2076 /* 2077 * Echo not only on VERBOSE, but also with history expansion. If there 2078 * is a lexical error then we forego history echo. 2079 * Do not echo if we're only entering history (source -h). 2080 */ 2081 if ((hadhist && !seterr && intty && !tellwhat && !Expand && !whyles) || 2082 (!enterhist && adrof(STRverbose))) 2083 { 2084 int odidfds = didfds; 2085 haderr = 1; 2086 didfds = 0; 2087 prlex(¶ml); 2088 flush(); 2089 haderr = 0; 2090 didfds = odidfds; 2091 } 2092 (void) alarm(0); /* Autologout OFF */ 2093 alrmcatch_disabled = 1; 2094 2095 /* 2096 * Save input text on the history list if reading in old history, or it 2097 * is from the terminal at the top level and not in a loop. 2098 * 2099 * PWP: entry of items in the history list while in a while loop is done 2100 * elsewhere... 2101 */ 2102 if (enterhist || (catch && intty && !whyles && !tellwhat && !arun)) 2103 savehist(¶ml, enterhist > 1); 2104 2105 if (Expand && seterr) 2106 Expand = 0; 2107 2108 /* 2109 * Print lexical error messages, except when sourcing history lists. 2110 */ 2111 if (!enterhist && seterr) 2112 stderror(ERR_OLD); 2113 2114 /* 2115 * If had a history command :p modifier then this is as far as we 2116 * should go 2117 */ 2118 if (justpr) 2119 goto cmd_done; 2120 2121 /* 2122 * If had a tellwhat from twenex() then do 2123 */ 2124 if (tellwhat) { 2125 (void) tellmewhat(¶ml, NULL); 2126 goto cmd_done; 2127 } 2128 2129 alias(¶ml); 2130 2131#ifdef BSDJOBS 2132 /* 2133 * If we are interactive, try to continue jobs that we have stopped 2134 */ 2135 if (prompt) 2136 continue_jobs(¶ml); 2137#endif /* BSDJOBS */ 2138 2139 /* 2140 * Check to see if the user typed "rm * .o" or something 2141 */ 2142 if (prompt) 2143 rmstar(¶ml); 2144 /* 2145 * Parse the words of the input into a parse tree. 2146 */ 2147 t = syntax(paraml.next, ¶ml, 0); 2148 /* 2149 * We cannot cleanup push here, because cd /blah; echo foo 2150 * would rewind t on the chdir error, and free the rest of the command 2151 */ 2152 if (seterr) { 2153 freesyn(t); 2154 stderror(ERR_OLD); 2155 } 2156 2157 postcmd(); 2158 /* 2159 * Execute the parse tree From: Michael Schroeder 2160 * <mlschroe@immd4.informatik.uni-erlangen.de> was execute(t, tpgrp); 2161 */ 2162 execute(t, (tpgrp > 0 ? tpgrp : -1), NULL, NULL, TRUE); 2163 freesyn(t); 2164 2165 /* 2166 * Made it! 2167 */ 2168#ifdef SIG_WINDOW 2169 if (windowchg || (catch && intty && !whyles && !tellwhat)) { 2170 (void) check_window_size(0); /* for window systems */ 2171 } 2172#endif /* SIG_WINDOW */ 2173 setcopy(STR_, InputBuf, VAR_READWRITE | VAR_NOGLOB); 2174 cmd_done: 2175 if (cleanup_reset()) 2176 cleanup_until(¶ml); 2177 else 2178 haderr = 1; 2179 } 2180 cleanup_pop_mark(omark); 2181 resexit(osetexit); 2182 exitset--; 2183 handle_pending_signals(); 2184} 2185 2186/*ARGSUSED*/ 2187void 2188dosource(Char **t, struct command *c) 2189{ 2190 Char *f; 2191 int hflg = 0; 2192 char *file; 2193 2194 USE(c); 2195 t++; 2196 if (*t && eq(*t, STRmh)) { 2197 if (*++t == NULL) 2198 stderror(ERR_NAME | ERR_HFLAG); 2199 hflg++; 2200 } 2201 else if (*t && eq(*t, STRmm)) { 2202 if (*++t == NULL) 2203 stderror(ERR_NAME | ERR_MFLAG); 2204 hflg = 2; 2205 } 2206 2207 f = globone(*t++, G_ERROR); 2208 file = strsave(short2str(f)); 2209 cleanup_push(file, xfree); 2210 xfree(f); 2211 t = glob_all_or_error(t); 2212 cleanup_push(t, blk_cleanup); 2213 if ((!srcfile(file, 0, hflg, t)) && (!hflg) && (!bequiet)) 2214 stderror(ERR_SYSTEM, file, strerror(errno)); 2215 cleanup_until(file); 2216} 2217 2218/* 2219 * Check for mail. 2220 * If we are a login shell, then we don't want to tell 2221 * about any mail file unless its been modified 2222 * after the time we started. 2223 * This prevents us from telling the user things he already 2224 * knows, since the login program insists on saying 2225 * "You have mail." 2226 */ 2227 2228/* 2229 * The AMS version. 2230 * This version checks if the file is a directory, and if so, 2231 * tells you the number of files in it, otherwise do the old thang. 2232 * The magic "+1" in the time calculation is to compensate for 2233 * an AFS bug where directory mtimes are set to 1 second in 2234 * the future. 2235 */ 2236 2237static void 2238mailchk(void) 2239{ 2240 struct varent *v; 2241 Char **vp; 2242 time_t t; 2243 int intvl, cnt; 2244 struct stat stb; 2245 int new; 2246 2247 v = adrof(STRmail); 2248 if (v == NULL || v->vec == NULL) 2249 return; 2250 (void) time(&t); 2251 vp = v->vec; 2252 cnt = blklen(vp); 2253 intvl = (cnt && number(*vp)) ? (--cnt, getn(*vp++)) : MAILINTVL; 2254 if (intvl < 1) 2255 intvl = 1; 2256 if (chktim + intvl > t) 2257 return; 2258 for (; *vp; vp++) { 2259 char *filename = short2str(*vp); 2260 char *mboxdir = filename; 2261 2262 if (stat(filename, &stb) < 0) 2263 continue; 2264#if defined(BSDTIMES) || defined(_SEQUENT_) 2265 new = stb.st_mtime > time0.tv_sec; 2266#else 2267 new = stb.st_mtime > seconds0; 2268#endif 2269 if (S_ISDIR(stb.st_mode)) { 2270 DIR *mailbox; 2271 int mailcount = 0; 2272 char *tempfilename; 2273 struct stat stc; 2274 2275 tempfilename = xasprintf("%s/new", filename); 2276 2277 if (stat(tempfilename, &stc) != -1 && S_ISDIR(stc.st_mode)) { 2278 /* 2279 * "filename/new" exists and is a directory; you are 2280 * using Qmail. 2281 */ 2282 stb = stc; 2283#if defined(BSDTIMES) || defined(_SEQUENT_) 2284 new = stb.st_mtime > time0.tv_sec; 2285#else 2286 new = stb.st_mtime > seconds0; 2287#endif 2288 mboxdir = tempfilename; 2289 } 2290 2291 if (stb.st_mtime <= chktim + 1 || (loginsh && !new)) { 2292 xfree(tempfilename); 2293 continue; 2294 } 2295 2296 mailbox = opendir(mboxdir); 2297 xfree(tempfilename); 2298 if (mailbox == NULL) 2299 continue; 2300 2301 /* skip . and .. */ 2302 if (!readdir(mailbox) || !readdir(mailbox)) { 2303 (void)closedir(mailbox); 2304 continue; 2305 } 2306 2307 while (readdir(mailbox)) 2308 mailcount++; 2309 2310 (void)closedir(mailbox); 2311 if (mailcount == 0) 2312 continue; 2313 2314 if (cnt == 1) 2315 xprintf(CGETS(11, 3, "You have %d mail messages.\n"), 2316 mailcount); 2317 else 2318 xprintf(CGETS(11, 4, "You have %d mail messages in %s.\n"), 2319 mailcount, filename); 2320 } 2321 else { 2322 char *type; 2323 2324 if (stb.st_size == 0 || stb.st_atime >= stb.st_mtime || 2325 (stb.st_atime <= chktim && stb.st_mtime <= chktim) || 2326 (loginsh && !new)) 2327 continue; 2328 type = strsave(new ? CGETS(11, 6, "new ") : ""); 2329 cleanup_push(type, xfree); 2330 if (cnt == 1) 2331 xprintf(CGETS(11, 5, "You have %smail.\n"), type); 2332 else 2333 xprintf(CGETS(11, 7, "You have %smail in %s.\n"), type, filename); 2334 cleanup_until(type); 2335 } 2336 } 2337 chktim = t; 2338} 2339 2340/* 2341 * Extract a home directory from the password file 2342 * The argument points to a buffer where the name of the 2343 * user whose home directory is sought is currently. 2344 * We return home directory of the user, or NULL. 2345 */ 2346Char * 2347gethdir(const Char *home) 2348{ 2349 Char *h; 2350 2351 /* 2352 * Is it us? 2353 */ 2354 if (*home == '\0') { 2355 if ((h = varval(STRhome)) != STRNULL) 2356 return Strsave(h); 2357 else 2358 return NULL; 2359 } 2360 2361 /* 2362 * Look in the cache 2363 */ 2364 if ((h = gettilde(home)) == NULL) 2365 return NULL; 2366 else 2367 return Strsave(h); 2368} 2369 2370/* 2371 * Move the initial descriptors to their eventual 2372 * resting places, closing all other units. 2373 */ 2374void 2375initdesc(void) 2376{ 2377#ifdef NLS_BUGS 2378#ifdef NLS_CATALOGS 2379 nlsclose(); 2380#endif /* NLS_CATALOGS */ 2381#endif /* NLS_BUGS */ 2382 2383 2384 didfds = 0; /* 0, 1, 2 aren't set up */ 2385 (void) close_on_exec(SHIN = dcopy(0, FSHIN), 1); 2386 (void) close_on_exec(SHOUT = dcopy(1, FSHOUT), 1); 2387 (void) close_on_exec(SHDIAG = dcopy(2, FSHDIAG), 1); 2388 (void) close_on_exec(OLDSTD = dcopy(SHIN, FOLDSTD), 1); 2389#ifndef CLOSE_ON_EXEC 2390 didcch = 0; /* Havent closed for child */ 2391#endif /* CLOSE_ON_EXEC */ 2392 if (SHDIAG >= 0) 2393 isdiagatty = isatty(SHDIAG); 2394 else 2395 isdiagatty = 0; 2396 if (SHDIAG >= 0) 2397 isoutatty = isatty(SHOUT); 2398 else 2399 isoutatty = 0; 2400#ifdef NLS_BUGS 2401#ifdef NLS_CATALOGS 2402 nlsinit(); 2403#endif /* NLS_CATALOGS */ 2404#endif /* NLS_BUGS */ 2405} 2406 2407 2408void 2409#ifdef PROF 2410done(int i) 2411#else 2412xexit(int i) 2413#endif 2414{ 2415#ifdef TESLA 2416 if (loginsh && do_logout) { 2417 /* this is to send hangup signal to the develcon */ 2418 /* we toggle DTR. clear dtr - sleep 1 - set dtr */ 2419 /* ioctl will return ENOTTY for pty's but we ignore it */ 2420 /* exitstat will run after disconnect */ 2421 /* we sleep for 2 seconds to let things happen in */ 2422 /* .logout and rechist() */ 2423#ifdef TIOCCDTR 2424 (void) sleep(2); 2425 (void) ioctl(FSHTTY, TIOCCDTR, NULL); 2426 (void) sleep(1); 2427 (void) ioctl(FSHTTY, TIOCSDTR, NULL); 2428#endif /* TIOCCDTR */ 2429 } 2430#endif /* TESLA */ 2431 2432 { 2433 struct process *pp, *np; 2434 pid_t mypid = getpid(); 2435 /* Kill all processes marked for hup'ing */ 2436 for (pp = proclist.p_next; pp; pp = pp->p_next) { 2437 np = pp; 2438 do 2439 if ((np->p_flags & PHUP) && np->p_jobid != shpgrp && 2440 np->p_parentid == mypid) { 2441 if (killpg(np->p_jobid, SIGHUP) != -1) { 2442 /* In case the job was suspended... */ 2443#ifdef SIGCONT 2444 (void) killpg(np->p_jobid, SIGCONT); 2445#endif 2446 break; 2447 } 2448 } 2449 while ((np = np->p_friends) != pp); 2450 } 2451 } 2452 untty(); 2453#ifdef NLS_CATALOGS 2454 /* 2455 * We need to call catclose, because SVR4 leaves symlinks behind otherwise 2456 * in the catalog directories. We cannot close on a vforked() child, 2457 * because messages will stop working on the parent too. 2458 */ 2459 if (child == 0) 2460 nlsclose(); 2461#endif /* NLS_CATALOGS */ 2462#ifdef WINNT_NATIVE 2463 nt_cleanup(); 2464#endif /* WINNT_NATIVE */ 2465 _exit(i); 2466} 2467 2468#ifndef _PATH_DEFPATH 2469static Char ** 2470defaultpath(void) 2471{ 2472 char *ptr; 2473 Char **blk, **blkp; 2474 struct stat stb; 2475 2476 blkp = blk = xmalloc(sizeof(Char *) * 10); 2477 2478#ifndef NODOT 2479# ifndef DOTLAST 2480 *blkp++ = Strsave(STRdot); 2481# endif 2482#endif 2483 2484#define DIRAPPEND(a) \ 2485 if (stat(ptr = a, &stb) == 0 && S_ISDIR(stb.st_mode)) \ 2486 *blkp++ = SAVE(ptr) 2487 2488#ifdef _PATH_LOCAL 2489 DIRAPPEND(_PATH_LOCAL); 2490#endif 2491 2492#ifdef _PATH_USRUCB 2493 DIRAPPEND(_PATH_USRUCB); 2494#endif 2495 2496#ifdef _PATH_USRBSD 2497 DIRAPPEND(_PATH_USRBSD); 2498#endif 2499 2500#ifdef _PATH_BIN 2501 DIRAPPEND(_PATH_BIN); 2502#endif 2503 2504#ifdef _PATH_USRBIN 2505 DIRAPPEND(_PATH_USRBIN); 2506#endif 2507 2508#undef DIRAPPEND 2509 2510#ifndef NODOT 2511# ifdef DOTLAST 2512 *blkp++ = Strsave(STRdot); 2513# endif 2514#endif 2515 *blkp = NULL; 2516 return (blk); 2517} 2518#endif 2519 2520static void 2521record(void) 2522{ 2523 static int again = 0; 2524 int ophup_disabled; 2525 2526 if (again++) 2527 return; 2528 2529 ophup_disabled = phup_disabled; 2530 phup_disabled = 1; 2531 if (!fast) { 2532 recdirs(NULL, adrof(STRsavedirs) != NULL); 2533 rechist(NULL, adrof(STRsavehist) != NULL); 2534 } 2535 displayHistStats("Exiting"); /* no-op unless DEBUG_HIST */ 2536 phup_disabled = ophup_disabled; 2537} 2538 2539/* 2540 * Grab the tty repeatedly, and give up if we are not in the correct 2541 * tty process group. 2542 */ 2543int 2544grabpgrp(int fd, pid_t desired) 2545{ 2546 struct sigaction old; 2547 pid_t pgrp; 2548 size_t i; 2549 2550 for (i = 0; i < 100; i++) { 2551 if ((pgrp = tcgetpgrp(fd)) == -1) 2552 return -1; 2553 if (pgrp == desired) 2554 return 0; 2555 (void)sigaction(SIGTTIN, NULL, &old); 2556 (void)signal(SIGTTIN, SIG_DFL); 2557 (void)kill(0, SIGTTIN); 2558 (void)sigaction(SIGTTIN, &old, NULL); 2559 } 2560 errno = EPERM; 2561 return -1; 2562} 2563