sh.h revision 83098
1/* $Header: /src/pub/tcsh/sh.h,v 3.96 2001/03/18 19:06:29 christos Exp $ */ 2/* 3 * sh.h: Catch it all globals and includes file! 4 */ 5/*- 6 * Copyright (c) 1980, 1991 The Regents of the University of California. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 */ 37#ifndef _h_sh 38#define _h_sh 39 40#include "config.h" 41 42#ifndef EXTERN 43# define EXTERN extern 44#else /* !EXTERN */ 45# ifdef WINNT_NATIVE 46# define IZERO = 0 47# define IZERO_STRUCT = {0} 48# endif /* WINNT_NATIVE */ 49#endif /* EXTERN */ 50 51#ifndef IZERO 52# define IZERO 53#endif /* IZERO */ 54#ifndef IZERO_STRUCT 55# define IZERO_STRUCT 56# endif /* IZERO_STRUCT */ 57 58#ifndef WINNT_NATIVE 59# define INIT_ZERO 60# define INIT_ZERO_STRUCT 61# define force_read read 62#endif /*!WINNT_NATIVE */ 63/* 64 * Sanity 65 */ 66#if defined(_POSIX_SOURCE) && !defined(POSIX) 67# define POSIX 68#endif 69 70#if defined(POSIXJOBS) && !defined(BSDJOBS) 71# define BSDJOBS 72#endif 73 74#if defined(POSIXSIGS) && !defined(BSDSIGS) 75# define BSDSIGS 76#endif 77 78#ifdef SHORT_STRINGS 79typedef short Char; 80typedef unsigned short uChar; 81# define SAVE(a) (Strsave(str2short(a))) 82#else 83typedef char Char; 84typedef unsigned char uChar; 85# define SAVE(a) (strsave(a)) 86#endif 87 88/* Elide unused argument warnings */ 89#define USE(a) (void) (a) 90/* 91 * If your compiler complains, then you can either 92 * throw it away and get gcc or, use the following define 93 * and get rid of the typedef. 94 * [The 4.2/3BSD vax compiler does not like that] 95 * Both MULTIFLOW and PCC compilers exhbit this bug. -- sterling@netcom.com 96 */ 97#ifdef SIGVOID 98# if (defined(vax) || defined(uts) || defined(MULTIFLOW) || defined(PCC)) && !defined(__GNUC__) 99# define sigret_t void 100# else /* !((vax || uts || MULTIFLOW || PCC) && !__GNUC__) */ 101typedef void sigret_t; 102# endif /* (vax || uts || MULTIFLOW || PCC) && !__GNUC__ */ 103#else /* !SIGVOID */ 104typedef int sigret_t; 105#endif /* SIGVOID */ 106 107/* 108 * Return true if the path is absolute 109 */ 110#ifndef WINNT_NATIVE 111# define ABSOLUTEP(p) (*(p) == '/') 112#else /* WINNT_NATIVE */ 113# define ABSOLUTEP(p) ((p)[0] == '/' || \ 114 (Isalpha((p)[0]) && (p)[1] == ':' && (p)[2] == '/')) 115#endif /* WINNT_NATIVE */ 116 117/* 118 * Fundamental definitions which may vary from system to system. 119 * 120 * BUFSIZE The i/o buffering size; also limits word size 121 * MAILINTVL How often to mailcheck; more often is more expensive 122 */ 123#ifdef BUFSIZE 124# if BUFSIZE < 4096 125# undef BUFSIZE 126# define BUFSIZE 4096 /* buffer size should be no less than this */ 127# endif 128#else 129# define BUFSIZE 4096 130#endif /* BUFSIZE */ 131 132#define FORKSLEEP 10 /* delay loop on non-interactive fork failure */ 133#define MAILINTVL 600 /* 10 minutes */ 134 135#ifndef INBUFSIZE 136# define INBUFSIZE 2*BUFSIZE /* Num input characters on the command line */ 137#endif /* INBUFSIZE */ 138 139 140/* 141 * What our builtin echo looks like 142 */ 143#define NONE_ECHO 0 144#define BSD_ECHO 1 145#define SYSV_ECHO 2 146#define BOTH_ECHO (BSD_ECHO|SYSV_ECHO) 147 148#ifndef ECHO_STYLE 149# if SYSVREL > 0 150# define ECHO_STYLE SYSV_ECHO 151# else /* SYSVREL == 0 */ 152# define ECHO_STYLE BSD_ECHO 153# endif /* SYSVREL */ 154#endif /* ECHO_STYLE */ 155 156/* 157 * The shell moves std in/out/diag and the old std input away from units 158 * 0, 1, and 2 so that it is easy to set up these standards for invoked 159 * commands. 160 */ 161#define FSHTTY 15 /* /dev/tty when manip pgrps */ 162#define FSHIN 16 /* Preferred desc for shell input */ 163#define FSHOUT 17 /* ... shell output */ 164#define FSHDIAG 18 /* ... shell diagnostics */ 165#define FOLDSTD 19 /* ... old std input */ 166 167#ifdef PROF 168#define xexit(n) done(n) 169#endif 170 171#ifdef cray 172# define word word_t /* sys/types.h defines word.. bad move! */ 173#endif 174 175#include <sys/types.h> 176 177#ifdef cray 178# undef word 179#endif 180 181/* 182 * Path separator in environment variables 183 */ 184#ifndef PATHSEP 185# if defined(__EMX__) || defined(WINNT_NATIVE) 186# define PATHSEP ';' 187# else /* unix */ 188# define PATHSEP ':' 189# endif /* __EMX__ || WINNT_NATIVE */ 190#endif /* !PATHSEP */ 191 192#if defined(__HP_CXD_SPP) && !defined(__hpux) 193# include <sys/cnx_stat.h> 194# define stat stat64 195# define fstat fstat64 196# define lstat lstat64 197#endif /* __HP_CXD_SPP && !__hpux */ 198 199/* 200 * This macro compares the st_dev field of struct stat. On aix on ibmESA 201 * st_dev is a structure, so comparison does not work. 202 */ 203#ifndef DEV_DEV_COMPARE 204# define DEV_DEV_COMPARE(x,y) ((x) == (y)) 205#endif /* DEV_DEV_COMPARE */ 206 207#ifdef _SEQUENT_ 208# include <sys/procstats.h> 209#endif /* _SEQUENT_ */ 210#if (defined(POSIX) || SYSVREL > 0) && !defined(WINNT_NATIVE) 211# include <sys/times.h> 212#endif /* (POSIX || SYSVREL > 0) && !WINNT_NATIVE */ 213 214#ifdef NLS 215# include <locale.h> 216#endif /* NLS */ 217 218 219#if !defined(_MINIX) && !defined(_VMS_POSIX) && !defined(WINNT_NATIVE) && !defined(__MVS__) 220# include <sys/param.h> 221#endif /* !_MINIX && !_VMS_POSIX && !WINNT_NATIVE && !__MVS__ */ 222#include <sys/stat.h> 223 224#if defined(BSDTIMES) || defined(BSDLIMIT) 225# include <sys/time.h> 226# if SYSVREL>3 && !defined(SCO) && !defined(sgi) && !defined(SNI) && !defined(sun) && !(defined(__alpha) && defined(__osf__)) && !defined(_SX) && !defined(__MVS__) 227# include "/usr/ucbinclude/sys/resource.h" 228# else 229# ifdef convex 230# define sysrusage cvxrusage 231# include <sys/sysinfo.h> 232# else 233# define sysrusage rusage 234# include <sys/resource.h> 235# endif /* convex */ 236# endif /* SYSVREL>3 */ 237#endif /* BSDTIMES */ 238 239#ifndef WINNT_NATIVE 240# ifndef POSIX 241# ifdef TERMIO 242# include <termio.h> 243# else /* SGTTY */ 244# include <sgtty.h> 245# endif /* TERMIO */ 246# else /* POSIX */ 247# ifndef _UWIN 248# include <termios.h> 249# else 250# include <termio.h> 251# endif /* _UWIN */ 252# if SYSVREL > 3 253# undef TIOCGLTC /* we don't need those, since POSIX has them */ 254# undef TIOCSLTC 255# undef CSWTCH 256# define CSWTCH _POSIX_VDISABLE /* So job control works */ 257# endif /* SYSVREL > 3 */ 258# endif /* POSIX */ 259#endif /* WINNT_NATIVE */ 260 261#ifdef sonyrisc 262# include <sys/ttold.h> 263#endif /* sonyrisc */ 264 265#if defined(POSIX) && !defined(WINNT_NATIVE) 266/* 267 * We should be using setpgid and setpgid 268 * by now, but in some systems we use the 269 * old routines... 270 */ 271# define getpgrp __getpgrp 272# define setpgrp __setpgrp 273# include <unistd.h> 274# undef getpgrp 275# undef setpgrp 276 277/* 278 * the gcc+protoize version of <stdlib.h> 279 * redefines malloc(), so we define the following 280 * to avoid it. 281 */ 282# if defined(linux) || defined(sgi) || defined(_OSD_POSIX) 283# define NO_FIX_MALLOC 284# include <stdlib.h> 285# else /* linux */ 286# define _GNU_STDLIB_H 287# define malloc __malloc 288# define free __free 289# define calloc __calloc 290# define realloc __realloc 291# include <stdlib.h> 292# undef malloc 293# undef free 294# undef calloc 295# undef realloc 296# endif /* linux || sgi */ 297# include <limits.h> 298#endif /* POSIX && !WINNT_NATIVE */ 299 300#if SYSVREL > 0 || defined(_IBMR2) || defined(_MINIX) || defined(linux) 301# if !defined(pyr) && !defined(stellar) 302# include <time.h> 303# ifdef _MINIX 304# define HZ CLOCKS_PER_SEC 305# endif /* _MINIX */ 306# endif /* !pyr && !stellar */ 307#endif /* SYSVREL > 0 || _IBMR2 */ 308 309/* In the following ifdef the DECOSF1 has been commented so that later 310 * versions of DECOSF1 will get TIOCGWINSZ. This might break older versions... 311 */ 312#if !((defined(SUNOS4) || defined(_MINIX) /* || defined(DECOSF1) */) && defined(TERMIO)) 313# if !defined(COHERENT) && !defined(_VMS_POSIX) && !defined(WINNT_NATIVE) 314# include <sys/ioctl.h> 315# endif 316#endif 317 318#if (defined(__DGUX__) && defined(POSIX)) || defined(DGUX) 319#undef CSWTCH 320#define CSWTCH _POSIX_VDISABLE 321#endif 322 323#if (!defined(FIOCLEX) && defined(SUNOS4)) || ((SYSVREL == 4) && !defined(_SEQUENT_) && !defined(SCO) && !defined(_SX)) && !defined(__MVS__) 324# include <sys/filio.h> 325#endif /* (!FIOCLEX && SUNOS4) || (SYSVREL == 4 && !_SEQUENT_ && !SCO && !_SX ) */ 326 327#if !defined(_MINIX) && !defined(COHERENT) && !defined(supermax) && !defined(WINNT_NATIVE) && !defined(IRIS4D) 328# include <sys/file.h> 329#endif /* !_MINIX && !COHERENT && !supermax && !WINNT_NATIVE && !defined(IRIS4D) */ 330 331#if !defined(O_RDONLY) || !defined(O_NDELAY) 332# include <fcntl.h> 333#endif 334 335#include <errno.h> 336 337#include <setjmp.h> 338 339#if __STDC__ || defined(FUNCPROTO) 340# include <stdarg.h> 341#else 342#ifdef _MINIX 343# include "mi.varargs.h" 344#else 345# include <varargs.h> 346#endif /* _MINIX */ 347#endif 348 349#ifdef DIRENT 350# include <dirent.h> 351#else 352# ifdef hp9000s500 353# include <ndir.h> 354# else 355# include <sys/dir.h> 356# endif 357# define dirent direct 358#endif /* DIRENT */ 359#if defined(hpux) || defined(sgi) || defined(OREO) || defined(COHERENT) 360# include <stdio.h> /* So the fgetpwent() prototypes work */ 361#endif /* hpux || sgi || OREO || COHERENT */ 362#ifndef WINNT_NATIVE 363#include <pwd.h> 364#include <grp.h> 365#endif /* WINNT_NATIVE */ 366#ifdef PW_SHADOW 367# include <shadow.h> 368#endif /* PW_SHADOW */ 369#ifdef PW_AUTH 370# include <auth.h> 371#endif /* PW_AUTH */ 372#if defined(BSD) && !defined(POSIX) 373# include <strings.h> 374# define strchr(a, b) index(a, b) 375# define strrchr(a, b) rindex(a, b) 376#else 377# include <string.h> 378#endif /* BSD */ 379 380/* 381 * IRIX-5.0 has <sys/cdefs.h>, but most system include files do not 382 * include it yet, so we include it here 383 */ 384#if defined(sgi) && SYSVREL > 3 385# include <sys/cdefs.h> 386#endif /* sgi && SYSVREL > 3 */ 387 388#ifdef REMOTEHOST 389# ifdef ISC 390# undef MAXHOSTNAMELEN /* Busted headers? */ 391# endif 392 393# include <netinet/in.h> 394# include <arpa/inet.h> 395# include <sys/socket.h> 396# if defined(_SS_SIZE) || defined(_SS_MAXSIZE) 397# define INET6 398# endif 399# include <sys/uio.h> /* For struct iovec */ 400#endif /* REMOTEHOST */ 401 402/* 403 * ANSIisms... These must be *after* the system include and 404 * *before* our includes, so that BSDreno has time to define __P 405 */ 406#undef __P 407#ifndef __P 408# if __STDC__ || defined(FUNCPROTO) 409# ifndef FUNCPROTO 410# define FUNCPROTO 411# endif 412# define __P(a) a 413# else 414# define __P(a) () 415# if !__STDC__ 416# define const 417# ifndef apollo 418# define volatile /* Apollo 'c' extensions need this */ 419# endif /* apollo */ 420# endif 421# endif 422#endif 423 424 425#ifdef PURIFY 426/* exit normally, allowing purify to trace leaks */ 427# define _exit exit 428typedef int pret_t; 429#else /* !PURIFY */ 430/* 431 * If your compiler complains, then you can either 432 * throw it away and get gcc or, use the following define 433 * and get rid of the typedef. 434 * [The 4.2/3BSD vax compiler does not like that] 435 * Both MULTIFLOW and PCC compilers exhbit this bug. -- sterling@netcom.com 436 */ 437# if (defined(vax) || defined(uts) || defined(MULTIFLOW) || defined(PCC)) && !defined(__GNUC__) 438# define pret_t void 439# else /* !((vax || uts || MULTIFLOW || PCC) && !__GNUC__) */ 440typedef void pret_t; 441# endif /* (vax || uts || MULTIFLOW || PCC) && !__GNUC__ */ 442#endif /* PURIFY */ 443 444typedef int bool; 445 446/* 447 * ASCII vs. EBCDIC 448 */ 449#if 'Z' - 'A' == 25 450# ifndef IS_ASCII 451# define IS_ASCII 452# endif 453#endif 454 455#include "sh.types.h" 456 457#ifndef WINNT_NATIVE 458# ifndef POSIX 459extern pid_t getpgrp __P((int)); 460# else /* POSIX */ 461# if (defined(BSD) && !defined(BSD4_4)) || defined(SUNOS4) || defined(IRIS4D) || defined(DGUX) 462extern pid_t getpgrp __P((int)); 463# else /* !(BSD || SUNOS4 || IRIS4D || DGUX) */ 464extern pid_t getpgrp __P((void)); 465# endif /* BSD || SUNOS4 || IRISD || DGUX */ 466# endif /* POSIX */ 467extern pid_t setpgrp __P((pid_t, pid_t)); 468#endif /* !WINNT_NATIVE */ 469 470typedef sigret_t (*signalfun_t) __P((int)); 471 472#ifndef lint 473typedef ptr_t memalign_t; 474#else 475typedef union { 476 char am_char, *am_char_p; 477 short am_short, *am_short_p; 478 int am_int, *am_int_p; 479 long am_long, *am_long_p; 480 float am_float, *am_float_p; 481 double am_double, *am_double_p; 482} *memalign_t; 483 484# define malloc lint_malloc 485# define free lint_free 486# define realloc lint_realloc 487# define calloc lint_calloc 488#endif 489 490#ifdef MDEBUG 491extern memalign_t DebugMalloc __P((unsigned, char *, int)); 492extern memalign_t DebugRealloc __P((ptr_t, unsigned, char *, int)); 493extern memalign_t DebugCalloc __P((unsigned, unsigned, char *, int)); 494extern void DebugFree __P((ptr_t, char *, int)); 495# define xmalloc(i) DebugMalloc(i, __FILE__, __LINE__) 496# define xrealloc(p, i)((p) ? DebugRealloc(p, i, __FILE__, __LINE__) : \ 497 DebugMalloc(i, __FILE__, __LINE__)) 498# define xcalloc(n, s) DebugCalloc(n, s, __FILE__, __LINE__) 499# define xfree(p) if (p) DebugFree(p, __FILE__, __LINE__) 500#else 501# ifdef SYSMALLOC 502# define xmalloc(i) smalloc(i) 503# define xrealloc(p, i) srealloc(p, i) 504# define xcalloc(n, s) scalloc(n, s) 505# define xfree(p) sfree(p) 506# else 507# define xmalloc(i) malloc(i) 508# define xrealloc(p, i) realloc(p, i) 509# define xcalloc(n, s) calloc(n, s) 510# define xfree(p) free(p) 511# endif /* SYSMALLOC */ 512#endif /* MDEBUG */ 513#include "sh.char.h" 514#include "sh.err.h" 515#include "sh.dir.h" 516#include "sh.proc.h" 517 518#include "pathnames.h" 519 520 521/* 522 * C shell 523 * 524 * Bill Joy, UC Berkeley 525 * October, 1978; May 1980 526 * 527 * Jim Kulp, IIASA, Laxenburg Austria 528 * April, 1980 529 */ 530 531#if !defined(MAXNAMLEN) && defined(_D_NAME_MAX) 532# define MAXNAMLEN _D_NAME_MAX 533#endif /* MAXNAMLEN */ 534 535#ifdef HESIOD 536# include <hesiod.h> 537#endif /* HESIOD */ 538 539#ifdef REMOTEHOST 540# include <netdb.h> 541#endif /* REMOTEHOST */ 542 543#ifndef MAXHOSTNAMELEN 544# if defined(SCO) && (SYSVREL > 3) 545# include <sys/socket.h> 546# else 547# define MAXHOSTNAMELEN 256 548# endif 549#endif /* MAXHOSTNAMELEN */ 550 551 552 553#define eq(a, b) (Strcmp(a, b) == 0) 554 555/* globone() flags */ 556#define G_ERROR 0 /* default action: error if multiple words */ 557#define G_IGNORE 1 /* ignore the rest of the words */ 558#define G_APPEND 2 /* make a sentence by cat'ing the words */ 559 560/* 561 * Global flags 562 */ 563EXTERN bool chkstop IZERO; /* Warned of stopped jobs... allow exit */ 564 565#if (defined(FIOCLEX) && defined(FIONCLEX)) || defined(F_SETFD) 566# define CLOSE_ON_EXEC 567#else 568EXTERN bool didcch IZERO; /* Have closed unused fd's for child */ 569#endif /* (FIOCLEX && FIONCLEX) || F_SETFD */ 570 571EXTERN bool didfds IZERO; /* Have setup i/o fd's for child */ 572EXTERN bool doneinp IZERO; /* EOF indicator after reset from readc */ 573EXTERN bool exiterr IZERO; /* Exit if error or non-zero exit status */ 574EXTERN bool child IZERO; /* Child shell ... errors cause exit */ 575EXTERN bool haderr IZERO; /* Reset was because of an error */ 576EXTERN bool intty IZERO; /* Input is a tty */ 577EXTERN bool intact IZERO; /* We are interactive... therefore prompt */ 578EXTERN bool justpr IZERO; /* Just print because of :p hist mod */ 579EXTERN bool loginsh IZERO; /* We are a loginsh -> .login/.logout */ 580EXTERN bool neednote IZERO; /* Need to pnotify() */ 581EXTERN bool noexec IZERO; /* Don't execute, just syntax check */ 582EXTERN bool pjobs IZERO; /* want to print jobs if interrupted */ 583EXTERN bool setintr IZERO; /* Set interrupts on/off -> Wait intr... */ 584EXTERN bool timflg IZERO; /* Time the next waited for command */ 585EXTERN bool havhash IZERO; /* path hashing is available */ 586EXTERN bool editing IZERO; /* doing filename expansion and line editing */ 587EXTERN bool noediting IZERO; /* initial $term defaulted to noedit */ 588EXTERN bool bslash_quote IZERO;/* PWP: tcsh-style quoting? (in sh.c) */ 589EXTERN bool isoutatty IZERO; /* is SHOUT a tty */ 590EXTERN bool isdiagatty IZERO;/* is SHDIAG a tty */ 591EXTERN bool is1atty IZERO; /* is file descriptor 1 a tty (didfds mode) */ 592EXTERN bool is2atty IZERO; /* is file descriptor 2 a tty (didfds mode) */ 593EXTERN bool arun IZERO; /* Currently running multi-line-aliases */ 594EXTERN int implicit_cd IZERO;/* implicit cd enabled?(1=enabled,2=verbose) */ 595EXTERN bool inheredoc IZERO; /* Currently parsing a heredoc */ 596 597/* 598 * Global i/o info 599 */ 600EXTERN Char *arginp IZERO; /* Argument input for sh -c and internal `xx` */ 601EXTERN int onelflg IZERO; /* 2 -> need line for -t, 1 -> exit on read */ 602extern Char *ffile; /* Name of shell file for $0 */ 603extern bool dolzero; /* if $?0 should return true... */ 604 605extern char *seterr; /* Error message from scanner/parser */ 606#ifndef BSD4_4 607extern int errno; /* Error from C library routines */ 608#endif 609extern int exitset; 610EXTERN Char *shtemp IZERO; /* Temp name for << shell files in /tmp */ 611 612#ifdef BSDTIMES 613EXTERN struct timeval time0; /* Time at which the shell started */ 614EXTERN struct sysrusage ru0; 615#else 616# ifdef _SEQUENT_ 617EXTERN timeval_t time0; /* time at which shell started */ 618EXTERN struct process_stats ru0; 619# else /* _SEQUENT_ */ 620# ifndef POSIX 621EXTERN time_t time0; /* time at which shell started */ 622# else /* POSIX */ 623EXTERN clock_t time0; /* time at which shell started */ 624EXTERN clock_t clk_tck; 625# endif /* POSIX */ 626EXTERN struct tms shtimes; /* shell and child times for process timing */ 627# endif /* _SEQUENT_ */ 628EXTERN long seconds0; 629#endif /* BSDTIMES */ 630 631#ifndef HZ 632# define HZ 100 /* for division into seconds */ 633#endif 634 635/* 636 * Miscellany 637 */ 638EXTERN Char *doldol; /* Character pid for $$ */ 639EXTERN int backpid; /* pid of the last background job */ 640 641/* 642 * Ideally these should be uid_t, gid_t, pid_t. I cannot do that right now 643 * cause pid's could be unsigned and that would break our -1 flag, and 644 * uid_t and gid_t are not defined in all the systems so I would have to 645 * make special cases for them. In the future... 646 */ 647EXTERN int uid, euid, /* Invokers real and effective */ 648 gid, egid; /* User and group ids */ 649EXTERN int opgrp, /* Initial pgrp and tty pgrp */ 650 shpgrp, /* Pgrp of shell */ 651 tpgrp; /* Terminal process group */ 652 /* If tpgrp is -1, leave tty alone! */ 653 654EXTERN Char PromptBuf[INBUFSIZE*2]; /* buffer for the actual printed prompt. 655 * this must be large enough to contain 656 * the input line and the prompt, in 657 * case a correction occurred... 658 */ 659EXTERN Char RPromptBuf[INBUFSIZE]; /* buffer for right-hand side prompt */ 660 661/* 662 * To be able to redirect i/o for builtins easily, the shell moves the i/o 663 * descriptors it uses away from 0,1,2. 664 * Ideally these should be in units which are closed across exec's 665 * (this saves work) but for version 6, this is not usually possible. 666 * The desired initial values for these descriptors are defined in 667 * sh.local.h. 668 */ 669EXTERN int SHIN IZERO; /* Current shell input (script) */ 670EXTERN int SHOUT IZERO; /* Shell output */ 671EXTERN int SHDIAG IZERO; /* Diagnostic output... shell errs go here */ 672EXTERN int OLDSTD IZERO; /* Old standard input (def for cmds) */ 673 674 675#if SYSVREL == 4 && defined(_UTS) 676/* 677 * From: fadden@uts.amdahl.com (Andy McFadden) 678 * we need sigsetjmp for UTS4, but not UTS2.1 679 */ 680# define SIGSETJMP 681#endif 682 683/* 684 * Error control 685 * 686 * Errors in scanning and parsing set up an error message to be printed 687 * at the end and complete. Other errors always cause a reset. 688 * Because of source commands and .cshrc we need nested error catches. 689 */ 690 691#ifdef NO_STRUCT_ASSIGNMENT 692 693# ifdef SIGSETJMP 694 typedef sigjmp_buf jmp_buf_t; 695 /* bugfix by Jak Kirman @ Brown U.: remove the (void) cast here, see sh.c */ 696# define setexit() sigsetjmp(reslab) 697# define reset() siglongjmp(reslab, 1) 698# else 699 typedef jmp_buf jmp_buf_t; 700 /* bugfix by Jak Kirman @ Brown U.: remove the (void) cast here, see sh.c */ 701# define setexit() setjmp(reslab) 702# define reset() longjmp(reslab, 1) 703# endif 704# define getexit(a) (void) memmove((ptr_t)&(a), (ptr_t)&reslab, sizeof(reslab)) 705# define resexit(a) (void) memmove((ptr_t)&reslab, (ptr_t)&(a), sizeof(reslab)) 706 707# define cpybin(a, b) (void) memmove((ptr_t)&(a), (ptr_t)&(b), sizeof(Bin)) 708 709#else 710 711# ifdef SIGSETJMP 712 typedef struct { sigjmp_buf j; } jmp_buf_t; 713# define setexit() sigsetjmp(reslab.j) 714# define reset() siglongjmp(reslab.j, 1) 715# else 716 typedef struct { jmp_buf j; } jmp_buf_t; 717# define setexit() setjmp(reslab.j) 718# define reset() longjmp(reslab.j, 1) 719# endif 720 721# define getexit(a) (void) ((a) = reslab) 722# define resexit(a) (void) (reslab = (a)) 723 724# define cpybin(a, b) (void) ((a) = (b)) 725 726#endif /* NO_STRUCT_ASSIGNMENT */ 727 728extern jmp_buf_t reslab; 729 730EXTERN Char *gointr; /* Label for an onintr transfer */ 731 732extern signalfun_t parintr; /* Parents interrupt catch */ 733extern signalfun_t parterm; /* Parents terminate catch */ 734 735/* 736 * Lexical definitions. 737 * 738 * All lexical space is allocated dynamically. 739 * The eighth/sixteenth bit of characters is used to prevent recognition, 740 * and eventually stripped. 741 */ 742#define META 0200 743#define ASCII 0177 744#ifdef SHORT_STRINGS 745# define QUOTE ((Char) 0100000)/* 16nth char bit used for 'ing */ 746# define TRIM 0077777 /* Mask to strip quote bit */ 747# define UNDER 0040000 /* Underline flag */ 748# define BOLD 0020000 /* Bold flag */ 749# define STANDOUT 0010000 /* Standout flag */ 750# define LITERAL 0004000 /* Literal character flag */ 751# define ATTRIBUTES 0074000 /* The bits used for attributes */ 752# define CHAR 0000377 /* Mask to mask out the character */ 753#else 754# define QUOTE ((Char) 0200) /* Eighth char bit used for 'ing */ 755# define TRIM 0177 /* Mask to strip quote bit */ 756# define UNDER 0000000 /* No extra bits to do both */ 757# define BOLD 0000000 /* Bold flag */ 758# define STANDOUT META /* Standout flag */ 759# define LITERAL 0000000 /* Literal character flag */ 760# define ATTRIBUTES 0200 /* The bits used for attributes */ 761# define CHAR 0000177 /* Mask to mask out the character */ 762#endif 763 764EXTERN int AsciiOnly; /* If set only 7 bits expected in characters */ 765 766/* 767 * Each level of input has a buffered input structure. 768 * There are one or more blocks of buffered input for each level, 769 * exactly one if the input is seekable and tell is available. 770 * In other cases, the shell buffers enough blocks to keep all loops 771 * in the buffer. 772 */ 773EXTERN struct Bin { 774 off_t Bfseekp; /* Seek pointer */ 775 off_t Bfbobp; /* Seekp of beginning of buffers */ 776 off_t Bfeobp; /* Seekp of end of buffers */ 777 int Bfblocks; /* Number of buffer blocks */ 778 Char **Bfbuf; /* The array of buffer blocks */ 779} B; 780 781/* 782 * This structure allows us to seek inside aliases 783 */ 784struct Ain { 785 int type; 786#define TCSH_I_SEEK 0 /* Invalid seek */ 787#define TCSH_A_SEEK 1 /* Alias seek */ 788#define TCSH_F_SEEK 2 /* File seek */ 789#define TCSH_E_SEEK 3 /* Eval seek */ 790 union { 791 off_t _f_seek; 792 Char* _c_seek; 793 } fc; 794#define f_seek fc._f_seek 795#define c_seek fc._c_seek 796 Char **a_seek; 797} ; 798 799extern int aret; /* Type of last char returned */ 800#define SEEKEQ(a, b) ((a)->type == (b)->type && \ 801 (a)->f_seek == (b)->f_seek && \ 802 (a)->a_seek == (b)->a_seek) 803 804#define fseekp B.Bfseekp 805#define fbobp B.Bfbobp 806#define feobp B.Bfeobp 807#define fblocks B.Bfblocks 808#define fbuf B.Bfbuf 809 810/* 811 * The shell finds commands in loops by reseeking the input 812 * For whiles, in particular, it reseeks to the beginning of the 813 * line the while was on; hence the while placement restrictions. 814 */ 815EXTERN struct Ain lineloc; 816 817EXTERN bool cantell; /* Is current source tellable ? */ 818 819/* 820 * Input lines are parsed into doubly linked circular 821 * lists of words of the following form. 822 */ 823struct wordent { 824 Char *word; 825 struct wordent *prev; 826 struct wordent *next; 827}; 828 829/* 830 * During word building, both in the initial lexical phase and 831 * when expanding $ variable substitutions, expansion by `!' and `$' 832 * must be inhibited when reading ahead in routines which are themselves 833 * processing `!' and `$' expansion or after characters such as `\' or in 834 * quotations. The following flags are passed to the getC routines 835 * telling them which of these substitutions are appropriate for the 836 * next character to be returned. 837 */ 838#define DODOL 1 839#define DOEXCL 2 840#define DOALL DODOL|DOEXCL 841 842/* 843 * Labuf implements a general buffer for lookahead during lexical operations. 844 * Text which is to be placed in the input stream can be stuck here. 845 * We stick parsed ahead $ constructs during initial input, 846 * process id's from `$$', and modified variable values (from qualifiers 847 * during expansion in sh.dol.c) here. 848 */ 849EXTERN Char *lap; 850 851/* 852 * Parser structure 853 * 854 * Each command is parsed to a tree of command structures and 855 * flags are set bottom up during this process, to be propagated down 856 * as needed during the semantics/exeuction pass (sh.sem.c). 857 */ 858struct command { 859 unsigned char t_dtyp; /* Type of node */ 860#define NODE_COMMAND 1 /* t_dcom <t_dlef >t_drit */ 861#define NODE_PAREN 2 /* ( t_dspr ) <t_dlef >t_drit */ 862#define NODE_PIPE 3 /* t_dlef | t_drit */ 863#define NODE_LIST 4 /* t_dlef ; t_drit */ 864#define NODE_OR 5 /* t_dlef || t_drit */ 865#define NODE_AND 6 /* t_dlef && t_drit */ 866 unsigned char t_nice; /* Nice value */ 867#ifdef apollo 868 unsigned char t_systype; /* System environment */ 869#endif 870 unsigned long t_dflg; /* Flags, e.g. F_AMPERSAND|... */ 871/* save these when re-doing */ 872#ifndef apollo 873#define F_SAVE (F_NICE|F_TIME|F_NOHUP|F_HUP) 874#else 875#define F_SAVE (F_NICE|F_TIME|F_NOHUP||F_HUP|F_VER) 876#endif 877#define F_AMPERSAND (1<<0) /* executes in background */ 878#define F_APPEND (1<<1) /* output is redirected >> */ 879#define F_PIPEIN (1<<2) /* input is a pipe */ 880#define F_PIPEOUT (1<<3) /* output is a pipe */ 881#define F_NOFORK (1<<4) /* don't fork, last ()ized cmd */ 882#define F_NOINTERRUPT (1<<5) /* should be immune from intr's */ 883/* spare */ 884#define F_STDERR (1<<7) /* redirect unit 2 with unit 1 */ 885#define F_OVERWRITE (1<<8) /* output was ! */ 886#define F_READ (1<<9) /* input redirection is << */ 887#define F_REPEAT (1<<10) /* reexec aft if, repeat,... */ 888#define F_NICE (1<<11) /* t_nice is meaningful */ 889#define F_NOHUP (1<<12) /* nohup this command */ 890#define F_TIME (1<<13) /* time this command */ 891#define F_BACKQ (1<<14) /* command is in `` */ 892#define F_HUP (1<<15) /* hup this command */ 893#ifdef apollo 894#define F_VER (1<<16) /* execute command under SYSTYPE */ 895#endif 896 union { 897 Char *T_dlef; /* Input redirect word */ 898 struct command *T_dcar; /* Left part of list/pipe */ 899 } L; 900 union { 901 Char *T_drit; /* Output redirect word */ 902 struct command *T_dcdr; /* Right part of list/pipe */ 903 } R; 904#define t_dlef L.T_dlef 905#define t_dcar L.T_dcar 906#define t_drit R.T_drit 907#define t_dcdr R.T_dcdr 908 Char **t_dcom; /* Command/argument vector */ 909 struct command *t_dspr; /* Pointer to ()'d subtree */ 910}; 911 912 913/* 914 * The keywords for the parser 915 */ 916#define TC_BREAK 0 917#define TC_BRKSW 1 918#define TC_CASE 2 919#define TC_DEFAULT 3 920#define TC_ELSE 4 921#define TC_END 5 922#define TC_ENDIF 6 923#define TC_ENDSW 7 924#define TC_EXIT 8 925#define TC_FOREACH 9 926#define TC_GOTO 10 927#define TC_IF 11 928#define TC_LABEL 12 929#define TC_LET 13 930#define TC_SET 14 931#define TC_SWITCH 15 932#define TC_TEST 16 933#define TC_THEN 17 934#define TC_WHILE 18 935 936/* 937 * These are declared here because they want to be 938 * initialized in sh.init.c (to allow them to be made readonly) 939 */ 940 941#if defined(hpux) && defined(__STDC__) && !defined(__GNUC__) 942 /* Avoid hpux ansi mode spurious warnings */ 943typedef void (*bfunc_t) (); 944#else 945typedef void (*bfunc_t) __P((Char **, struct command *)); 946#endif /* hpux && __STDC__ && !__GNUC__ */ 947 948extern struct biltins { 949 char *bname; 950 bfunc_t bfunct; 951 int minargs, maxargs; 952} bfunc[]; 953extern int nbfunc; 954#ifdef WINNT_NATIVE 955extern struct biltins nt_bfunc[]; 956extern int nt_nbfunc; 957#endif /* WINNT_NATIVE*/ 958 959extern struct srch { 960 char *s_name; 961 int s_value; 962} srchn[]; 963extern int nsrchn; 964 965/* 966 * Structure defining the existing while/foreach loops at this 967 * source level. Loops are implemented by seeking back in the 968 * input. For foreach (fe), the word list is attached here. 969 */ 970EXTERN struct whyle { 971 struct Ain w_start; /* Point to restart loop */ 972 struct Ain w_end; /* End of loop (0 if unknown) */ 973 Char **w_fe, **w_fe0; /* Current/initial wordlist for fe */ 974 Char *w_fename; /* Name for fe */ 975 struct whyle *w_next; /* Next (more outer) loop */ 976} *whyles; 977 978/* 979 * Variable structure 980 * 981 * Aliases and variables are stored in AVL balanced binary trees. 982 */ 983EXTERN struct varent { 984 Char **vec; /* Array of words which is the value */ 985 Char *v_name; /* Name of variable/alias */ 986 int v_flags; /* Flags */ 987#define VAR_ALL -1 988#define VAR_READONLY 1 989#define VAR_READWRITE 2 990#define VAR_NOGLOB 4 991#define VAR_FIRST 32 992#define VAR_LAST 64 993 struct varent *v_link[3]; /* The links, see below */ 994 int v_bal; /* Balance factor */ 995} shvhed IZERO_STRUCT, aliases IZERO_STRUCT; 996 997#define v_left v_link[0] 998#define v_right v_link[1] 999#define v_parent v_link[2] 1000 1001#define adrof(v) adrof1(v, &shvhed) 1002#define varval(v) value1(v, &shvhed) 1003 1004/* 1005 * The following are for interfacing redo substitution in 1006 * aliases to the lexical routines. 1007 */ 1008EXTERN struct wordent *alhistp IZERO_STRUCT;/* Argument list (first) */ 1009EXTERN struct wordent *alhistt IZERO_STRUCT;/* Node after last in arg list */ 1010EXTERN Char **alvec IZERO_STRUCT, 1011 *alvecp IZERO_STRUCT;/* The (remnants of) alias vector */ 1012 1013/* 1014 * Filename/command name expansion variables 1015 */ 1016EXTERN int gflag; /* After tglob -> is globbing needed? */ 1017 1018#define MAXVARLEN 30 /* Maximum number of char in a variable name */ 1019 1020#ifndef MAXPATHLEN 1021# define MAXPATHLEN 2048 1022#endif /* MAXPATHLEN */ 1023 1024#ifndef MAXNAMLEN 1025# define MAXNAMLEN 512 1026#endif /* MAXNAMLEN */ 1027 1028#ifndef HAVENOLIMIT 1029/* 1030 * resource limits 1031 */ 1032extern struct limits { 1033 int limconst; 1034 char *limname; 1035 int limdiv; 1036 char *limscale; 1037} limits[]; 1038#endif /* !HAVENOLIMIT */ 1039 1040/* 1041 * Variables for filename expansion 1042 */ 1043extern Char **gargv; /* Pointer to the (stack) arglist */ 1044extern int gargc; /* Number args in gargv */ 1045 1046/* 1047 * Variables for command expansion. 1048 */ 1049extern Char **pargv; /* Pointer to the argv list space */ 1050EXTERN Char *pargs; /* Pointer to start current word */ 1051EXTERN long pnleft; /* Number of chars left in pargs */ 1052EXTERN Char *pargcp; /* Current index into pargs */ 1053 1054/* 1055 * History list 1056 * 1057 * Each history list entry contains an embedded wordlist 1058 * from the scanner, a number for the event, and a reference count 1059 * to aid in discarding old entries. 1060 * 1061 * Essentially "invisible" entries are put on the history list 1062 * when history substitution includes modifiers, and thrown away 1063 * at the next discarding since their event numbers are very negative. 1064 */ 1065EXTERN struct Hist { 1066 struct wordent Hlex; 1067 int Hnum; 1068 int Href; 1069 time_t Htime; 1070 Char *histline; 1071 struct Hist *Hnext; 1072} Histlist IZERO_STRUCT; 1073 1074EXTERN struct wordent paraml; /* Current lexical word list */ 1075EXTERN int eventno; /* Next events number */ 1076EXTERN int lastev; /* Last event reference (default) */ 1077 1078EXTERN Char HIST; /* history invocation character */ 1079EXTERN Char HISTSUB; /* auto-substitute character */ 1080EXTERN Char PRCH; /* Prompt symbol for regular users */ 1081EXTERN Char PRCHROOT; /* Prompt symbol for root */ 1082 1083/* 1084 * For operating systems with single case filenames (OS/2) 1085 */ 1086#ifdef CASE_INSENSITIVE 1087# define samecase(x) (isupper((unsigned char)(x)) ? \ 1088 tolower((unsigned char)(x)) : (x)) 1089#else 1090# define samecase(x) (x) 1091#endif /* CASE_INSENSITIVE */ 1092 1093/* 1094 * strings.h: 1095 */ 1096#ifndef SHORT_STRINGS 1097#define Strchr(a, b) strchr(a, b) 1098#define Strrchr(a, b) strrchr(a, b) 1099#define Strcat(a, b) strcat(a, b) 1100#define Strncat(a, b, c) strncat(a, b, c) 1101#define Strcpy(a, b) strcpy(a, b) 1102#define Strncpy(a, b, c) strncpy(a, b, c) 1103#define Strlen(a) strlen(a) 1104#define Strcmp(a, b) strcmp(a, b) 1105#define Strncmp(a, b, c) strncmp(a, b, c) 1106 1107#define Strspl(a, b) strspl(a, b) 1108#define Strsave(a) strsave(a) 1109#define Strend(a) strend(a) 1110#define Strstr(a, b) strstr(a, b) 1111 1112#define str2short(a) (a) 1113#define blk2short(a) saveblk(a) 1114#define short2blk(a) saveblk(a) 1115#define short2str(a) strip(a) 1116#else 1117#define Strchr(a, b) s_strchr(a, b) 1118#define Strrchr(a, b) s_strrchr(a, b) 1119#define Strcat(a, b) s_strcat(a, b) 1120#define Strncat(a, b, c) s_strncat(a, b, c) 1121#define Strcpy(a, b) s_strcpy(a, b) 1122#define Strncpy(a, b, c) s_strncpy(a, b, c) 1123#define Strlen(a) s_strlen(a) 1124#define Strcmp(a, b) s_strcmp(a, b) 1125#define Strncmp(a, b, c) s_strncmp(a, b, c) 1126 1127#define Strspl(a, b) s_strspl(a, b) 1128#define Strsave(a) s_strsave(a) 1129#define Strend(a) s_strend(a) 1130#define Strstr(a, b) s_strstr(a, b) 1131#endif 1132 1133/* 1134 * setname is a macro to save space (see sh.err.c) 1135 */ 1136EXTERN char *bname; 1137 1138#define setname(a) (bname = (a)) 1139 1140#ifdef VFORK 1141EXTERN Char *Vsav; 1142EXTERN Char *Vdp; 1143EXTERN Char *Vexpath; 1144EXTERN char **Vt; 1145#endif /* VFORK */ 1146 1147EXTERN Char **evalvec; 1148EXTERN Char *evalp; 1149 1150extern struct mesg { 1151 char *iname; /* name from /usr/include */ 1152 char *pname; /* print name */ 1153} mesg[]; 1154 1155/* word_chars is set by default to WORD_CHARS but can be overridden by 1156 the worchars variable--if unset, reverts to WORD_CHARS */ 1157 1158EXTERN Char *word_chars; 1159 1160#define WORD_CHARS "*?_-.[]~=" /* default chars besides alnums in words */ 1161 1162EXTERN Char *STR_SHELLPATH; 1163 1164#ifdef _PATH_BSHELL 1165EXTERN Char *STR_BSHELL; 1166#endif 1167EXTERN Char *STR_WORD_CHARS; 1168EXTERN Char **STR_environ IZERO; 1169 1170extern int dont_free; /* Tell free that we are in danger if we free */ 1171 1172extern Char *INVPTR; 1173extern Char **INVPPTR; 1174 1175extern char *progname; 1176extern int tcsh; 1177 1178#include "tc.h" 1179#include "sh.decls.h" 1180 1181/* 1182 * To print system call errors... 1183 */ 1184#ifdef BSD4_4 1185# include <errno.h> 1186#else 1187# ifndef linux 1188# ifdef NEEDstrerror 1189extern char *sys_errlist[]; 1190# endif 1191extern int errno, sys_nerr; 1192# endif /* !linux */ 1193#endif 1194 1195#ifndef WINNT_NATIVE 1196# ifdef NLS_CATALOGS 1197# ifdef linux 1198# include <locale.h> 1199# ifdef notdef 1200# include <localeinfo.h> /* Has this changed ? */ 1201# endif 1202# include <features.h> 1203# endif 1204# ifdef SUNOS4 1205 /* Who stole my nl_types.h? :-( 1206 * All this stuff is in the man pages, but nowhere else? 1207 * This does not link right now... 1208 */ 1209 typedef void *nl_catd; 1210 extern const char * catgets __P((nl_catd, int, int, const char *)); 1211 nl_catd catopen __P((const char *, int)); 1212 int catclose __P((nl_catd)); 1213# else 1214# ifdef __uxps__ 1215# define gettxt gettxt_ds 1216# endif 1217# include <nl_types.h> 1218# ifdef __uxps__ 1219# undef gettxt 1220# endif 1221# endif 1222# ifndef MCLoadBySet 1223# define MCLoadBySet 0 1224# endif 1225EXTERN nl_catd catd; 1226# define CGETS(b, c, d) catgets(catd, b, c, d) 1227# define CSAVS(b, c, d) strsave(CGETS(b, c, d)) 1228# else 1229# define CGETS(b, c, d) d 1230# define CSAVS(b, c, d) d 1231# endif 1232#else /* WINNT_NATIVE */ 1233# define CGETS(b, c, d) nt_cgets( b, c, d) 1234# define CSAVS(b, c, d) strsave(CGETS(b, c, d)) 1235#endif /* WINNT_NATIVE */ 1236 1237/* 1238 * Since on some machines characters are unsigned, and the signed 1239 * keyword is not universally implemented, we treat all characters 1240 * as unsigned and sign extend them where we need. 1241 */ 1242#define SIGN_EXTEND_CHAR(a) (((a) & 0x80) ? ((a) | ~0x7f) : (a)) 1243 1244#endif /* _h_sh */ 1245