1 /* 2 * Public Domain Bourne/Korn shell 3 */ 4 5 /* $Id: sh.h,v 1.2 1994/05/19 18:32:40 michael Exp michael $ */ 6 7 #include "config.h" /* system and option configuration info */ 8 9 #ifdef HAVE_PROTOTYPES 10 # define ARGS(args) args /* prototype declaration */ 11 #else 12 # define ARGS(args) () /* K&R declaration */ 13 #endif 14 15 16 /* Start of common headers */ 17 18 #include <stdio.h> 19 #include <sys/types.h> 20 #include <setjmp.h> 21 #ifdef HAVE_STDDEF_H 22 # include <stddef.h> 23 #endif 24 25 #ifdef HAVE_STDLIB_H 26 # include <stdlib.h> 27 #else 28 /* just a useful subset of what stdlib.h would have */ 29 extern char * getenv ARGS((const char *)); 30 extern void * malloc ARGS((size_t)); 31 extern void * realloc ARGS((void *, size_t)); 32 extern int free ARGS((void *)); 33 extern int exit ARGS((int)); 34 extern int rand ARGS((void)); 35 extern void srand ARGS((unsigned int)); 36 extern int atoi ARGS((const char *)); 37 #endif /* HAVE_STDLIB_H */ 38 39 #ifdef HAVE_UNISTD_H 40 # include <unistd.h> 41 #else 42 /* just a useful subset of what unistd.h would have */ 43 extern int access ARGS((const char *, int)); 44 extern int open ARGS((const char *, int, ...)); 45 extern int creat ARGS((const char *, mode_t)); 46 extern int read ARGS((int, char *, unsigned)); 47 extern int write ARGS((int, const char *, unsigned)); 48 extern off_t lseek ARGS((int, off_t, int)); 49 extern int close ARGS((int)); 50 extern int pipe ARGS((int [])); 51 extern int dup2 ARGS((int, int)); 52 extern int unlink ARGS((const char *)); 53 extern int fork ARGS((void)); 54 extern int execve ARGS((const char *, char * const[], char * const[])); 55 extern int chdir ARGS((const char *)); 56 extern int kill ARGS((pid_t, int)); 57 extern char *getcwd(); /* no ARGS here - differs on different machines */ 58 extern int geteuid ARGS((void)); 59 extern int readlink ARGS((const char *, char *, int)); 60 extern int getegid ARGS((void)); 61 extern int getpid ARGS((void)); 62 extern int getppid ARGS((void)); 63 extern unsigned int sleep ARGS((unsigned int)); 64 extern int isatty ARGS((int)); 65 # ifdef POSIX_PGRP 66 extern int getpgrp ARGS((void)); 67 extern int setpgid ARGS((pid_t, pid_t)); 68 # endif /* POSIX_PGRP */ 69 # ifdef BSD_PGRP 70 extern int getpgrp ARGS((pid_t)); 71 extern int setpgrp ARGS((pid_t, pid_t)); 72 # endif /* BSD_PGRP */ 73 # ifdef SYSV_PGRP 74 extern int getpgrp ARGS((void)); 75 extern int setpgrp ARGS((void)); 76 # endif /* SYSV_PGRP */ 77 #endif /* HAVE_UNISTD_H */ 78 79 #ifdef HAVE_STRING_H 80 # include <string.h> 81 #else 82 # include <strings.h> 83 # define strchr index 84 # define strrchr rindex 85 #endif /* HAVE_STRING_H */ 86 #ifndef HAVE_STRSTR 87 char *strstr ARGS((const char *s, const char *p)); 88 #endif /* HAVE_STRSTR */ 89 #ifndef HAVE_STRCASECMP 90 int strcasecmp ARGS((const char *s1, const char *s2)); 91 int strncasecmp ARGS((const char *s1, const char *s2, int n)); 92 #endif /* HAVE_STRCASECMP */ 93 94 #ifdef HAVE_MEMORY_H 95 # include <memory.h> 96 #endif 97 #ifndef HAVE_MEMSET 98 # define memcpy(d, s, n) bcopy(s, d, n) 99 # define memcmp(s1, s2, n) bcmp(s1, s2, n) 100 void *memset ARGS((void *d, int c, size_t n)); 101 #endif /* HAVE_MEMSET */ 102 #ifndef HAVE_MEMMOVE 103 # ifdef HAVE_BCOPY 104 # define memmove(d, s, n) bcopy(s, d, n) 105 # else 106 void *memmove ARGS((void *d, const void *s, size_t n)); 107 # endif 108 #endif /* HAVE_MEMMOVE */ 109 110 #ifdef HAVE_PROTOTYPES 111 # include <stdarg.h> 112 # define SH_VA_START(va, argn) va_start(va, argn) 113 #else 114 # include <varargs.h> 115 # define SH_VA_START(va, argn) va_start(va) 116 #endif /* HAVE_PROTOTYPES */ 117 118 #include <errno.h> 119 extern int errno; 120 121 #ifdef HAVE_FCNTL_H 122 # include <fcntl.h> 123 #else 124 # include <sys/file.h> 125 #endif /* HAVE_FCNTL_H */ 126 #ifndef O_ACCMODE 127 # define O_ACCMODE (O_RDONLY|O_WRONLY|O_RDWR) 128 #endif /* !O_ACCMODE */ 129 130 #ifndef F_OK /* access() arguments */ 131 # define F_OK 0 132 # define X_OK 1 133 # define W_OK 2 134 # define R_OK 4 135 #endif /* !F_OK */ 136 137 #ifndef SEEK_SET 138 # ifdef L_SET 139 # define SEEK_SET L_SET 140 # define SEEK_CUR L_INCR 141 # define SEEK_END L_XTND 142 # else /* L_SET */ 143 # define SEEK_SET 0 144 # define SEEK_CUR 1 145 # define SEEK_END 2 146 # endif /* L_SET */ 147 #endif /* !SEEK_SET */ 148 149 /* Some machines (eg, FreeBSD 1.1.5) define CLK_TCK in limits.h 150 * (ksh_limval.h assumes limits has been included, if available) 151 */ 152 #ifdef HAVE_LIMITS_H 153 # include <limits.h> 154 #endif /* HAVE_LIMITS_H */ 155 156 #include <signal.h> 157 #ifdef NSIG 158 # define SIGNALS NSIG 159 #else 160 # ifdef _MINIX 161 # define SIGNALS (_NSIG+1) /* _NSIG is # of signals used, excluding 0. */ 162 # else 163 # ifdef _SIGMAX /* QNX */ 164 # define SIGNALS _SIGMAX 165 # else /* _SIGMAX */ 166 # define SIGNALS 32 167 # endif /* _SIGMAX */ 168 # endif /* _MINIX */ 169 #endif /* NSIG */ 170 #ifndef SIGCHLD 171 # define SIGCHLD SIGCLD 172 #endif 173 /* struct sigaction.sa_flags is set to KSH_SA_FLAGS. Used to ensure 174 * system calls are interrupted 175 */ 176 #ifdef SA_INTERRUPT 177 # define KSH_SA_FLAGS SA_INTERRUPT 178 #else /* SA_INTERRUPT */ 179 # define KSH_SA_FLAGS 0 180 #endif /* SA_INTERRUPT */ 181 182 typedef RETSIGTYPE (*handler_t) ARGS((int)); /* signal handler */ 183 184 #ifdef USE_FAKE_SIGACT 185 # include "sigact.h" /* use sjg's fake sigaction() */ 186 #endif 187 188 #ifdef HAVE_PATHS_H 189 # include <paths.h> 190 #endif /* HAVE_PATHS_H */ 191 #ifdef _PATH_DEFPATH 192 # define DEFAULT__PATH _PATH_DEFPATH 193 #else /* _PATH_DEFPATH */ 194 # define DEFAULT__PATH DEFAULT_PATH 195 #endif /* _PATH_DEFPATH */ 196 197 #ifndef offsetof 198 # define offsetof(type,id) ((size_t)&((type*)NULL)->id) 199 #endif 200 201 #ifndef HAVE_KILLPG 202 # define killpg(p, s) kill(-(p), (s)) 203 #endif /* !HAVE_KILLPG */ 204 205 /* Special cases for execve(2) */ 206 #ifdef OS2 207 extern int ksh_execve(char *cmd, char **args, char **env, int flags); 208 #else /* OS2 */ 209 # if defined(OS_ISC) && defined(_POSIX_SOURCE) 210 /* Kludge for ISC 3.2 (and other versions?) so programs will run correctly. */ 211 # define ksh_execve(p, av, ev, flags) \ 212 do { \ 213 __setostype(0); \ 214 execve(p, av, ev); \ 215 __setostype(1); \ 216 } while (0) 217 # else /* OS_ISC && _POSIX */ 218 # define ksh_execve(p, av, ev, flags) execve(p, av, ev) 219 # endif /* OS_ISC && _POSIX */ 220 #endif /* OS2 */ 221 222 /* this is a hang-over from older versions of the os2 port */ 223 #define ksh_dupbase(fd, base) fcntl(fd, F_DUPFD, base) 224 225 #ifdef HAVE_SIGSETJMP 226 # define ksh_sigsetjmp(env,sm) sigsetjmp((env), (sm)) 227 # define ksh_siglongjmp(env,v) siglongjmp((env), (v)) 228 # define ksh_jmp_buf sigjmp_buf 229 #else /* HAVE_SIGSETJMP */ 230 # ifdef HAVE__SETJMP 231 # define ksh_sigsetjmp(env,sm) _setjmp(env) 232 # define ksh_siglongjmp(env,v) _longjmp((env), (v)) 233 # else /* HAVE__SETJMP */ 234 # define ksh_sigsetjmp(env,sm) setjmp(env) 235 # define ksh_siglongjmp(env,v) longjmp((env), (v)) 236 # endif /* HAVE__SETJMP */ 237 # define ksh_jmp_buf jmp_buf 238 #endif /* HAVE_SIGSETJMP */ 239 240 #ifndef HAVE_DUP2 241 extern int dup2 ARGS((int, int)); 242 #endif /* !HAVE_DUP2 */ 243 244 /* Find a integer type that is at least 32 bits (or die) - SIZEOF_* defined 245 * by autoconf (assumes an 8 bit byte, but I'm not concerned). 246 * NOTE: INT32 may end up being more than 32 bits. 247 */ 248 #ifdef __OLD__ 249 #if SIZEOF_INT >= 4 250 # define INT32 long 251 /* #else SIZEOF_INT */ 252 # if SIZEOF_LONG >= 4 253 # define INT32 long 254 # else /* SIZEOF_LONG */ 255 #error cannot find 32 bit type... 256 # endif /* SIZEOF_LONG */ 257 #endif /* SIZEOF_INT */ 258 #endif 259 260 #define INT32 long 261 262 /* end of common headers */ 263 264 /* Stop gcc and lint from complaining about possibly uninitialized variables */ 265 #if defined(__GNUC__) || defined(lint) 266 # define UNINITIALIZED(var) var = 0 267 #else 268 # define UNINITIALIZED(var) var 269 #endif /* GNUC || lint */ 270 271 /* some useful #defines */ 272 #ifdef EXTERN 273 # define I__(i) = i 274 #else 275 # define I__(i) 276 # define EXTERN extern 277 # define EXTERN_DEFINED 278 #endif 279 280 #ifdef OS2 281 # define inDOS() (!(_emx_env & 0x200)) 282 #endif 283 284 #ifndef EXECSHELL 285 /* shell to exec scripts (see also $SHELL initialization in main.c) */ 286 # ifdef OS2 287 # define EXECSHELL (inDOS() ? "c:\\command.com" : "c:\\os2\\cmd.exe") 288 # define EXECSHELL_STR (inDOS() ? "COMSPEC" : "OS2_SHELL") 289 # else /* OS2 */ 290 # define EXECSHELL "/bin/sh" 291 # define EXECSHELL_STR "EXECSHELL" 292 # endif /* OS2 */ 293 #endif 294 295 /* ISABSPATH() means path is fully and completely specified, 296 * ISROOTEDPATH() means a .. as the first component is a no-op, 297 * ISRELPATH() means $PWD can be tacked on to get an absolute path. 298 * 299 * OS Path ISABSPATH ISROOTEDPATH ISRELPATH 300 * unix /foo yes yes no 301 * unix foo no no yes 302 * unix ../foo no no yes 303 * os2+cyg a:/foo yes yes no 304 * os2+cyg a:foo no no no 305 * os2+cyg /foo no yes no 306 * os2+cyg foo no no yes 307 * os2+cyg ../foo no no yes 308 * cyg //foo yes yes no 309 */ 310 #ifdef OS2 311 # define PATHSEP ';' 312 # define DIRSEP '/' /* even though \ is native */ 313 # define DIRSEPSTR "\\" 314 # define ISDIRSEP(c) ((c) == '\\' || (c) == '/') 315 # define ISABSPATH(s) (((s)[0] && (s)[1] == ':' && ISDIRSEP((s)[2]))) 316 # define ISROOTEDPATH(s) (ISDIRSEP((s)[0]) || ISABSPATH(s)) 317 # define ISRELPATH(s) (!(s)[0] || ((s)[1] != ':' && !ISDIRSEP((s)[0]))) 318 # define FILECHCONV(c) (isascii(c) && isupper(c) ? tolower(c) : c) 319 # define FILECMP(s1, s2) stricmp(s1, s2) 320 # define FILENCMP(s1, s2, n) strnicmp(s1, s2, n) 321 extern char *ksh_strchr_dirsep(const char *path); 322 extern char *ksh_strrchr_dirsep(const char *path); 323 # define chdir _chdir2 324 # define getcwd _getcwd2 325 #else 326 # define PATHSEP ':' 327 # define DIRSEP '/' 328 # define DIRSEPSTR "/" 329 # define ISDIRSEP(c) ((c) == '/') 330 #ifdef __CYGWIN__ 331 # define ISABSPATH(s) \ 332 (((s)[0] && (s)[1] == ':' && ISDIRSEP((s)[2])) || ISDIRSEP((s)[0])) 333 # define ISRELPATH(s) (!(s)[0] || ((s)[1] != ':' && !ISDIRSEP((s)[0]))) 334 #else /* __CYGWIN__ */ 335 # define ISABSPATH(s) ISDIRSEP((s)[0]) 336 # define ISRELPATH(s) (!ISABSPATH(s)) 337 #endif /* __CYGWIN__ */ 338 # define ISROOTEDPATH(s) ISABSPATH(s) 339 # define FILECHCONV(c) c 340 # define FILECMP(s1, s2) strcmp(s1, s2) 341 # define FILENCMP(s1, s2, n) strncmp(s1, s2, n) 342 # define ksh_strchr_dirsep(p) strchr(p, DIRSEP) 343 # define ksh_strrchr_dirsep(p) strrchr(p, DIRSEP) 344 #endif 345 346 typedef int bool_t; 347 #define FALSE 0 348 #define TRUE 1 349 350 #define NELEM(a) (sizeof(a) / sizeof((a)[0])) 351 #define sizeofN(type, n) (sizeof(type) * (n)) 352 #define BIT(i) (1<<(i)) /* define bit in flag */ 353 354 /* Table flag type - needs > 16 and < 32 bits */ 355 typedef INT32 Tflag; 356 357 #define NUFILE 10 /* Number of user-accessible files */ 358 #define FDBASE 10 /* First file usable by Shell */ 359 360 /* you're not going to run setuid shell scripts, are you? */ 361 #define eaccess(path, mode) access(path, mode) 362 363 /* Make MAGIC a char that might be printed to make bugs more obvious, but 364 * not a char that is used often. Also, can't use the high bit as it causes 365 * portability problems (calling strchr(x, 0x80|'x') is error prone). 366 */ 367 #define MAGIC (7)/* prefix for *?[!{,} during expand */ 368 #define ISMAGIC(c) ((unsigned char)(c) == MAGIC) 369 #define NOT '!' /* might use ^ (ie, [!...] vs [^..]) */ 370 371 #define LINE 1024 /* input line size */ 372 #define PATH 1024 /* pathname size (todo: PATH_MAX/pathconf()) */ 373 #define ARRAYMAX 1023 /* max array index */ 374 375 EXTERN const char *kshname; /* $0 */ 376 EXTERN pid_t kshpid; /* $$, shell pid */ 377 EXTERN pid_t procpid; /* pid of executing process */ 378 EXTERN int ksheuid; /* effective uid of shell */ 379 EXTERN int exstat; /* exit status */ 380 EXTERN int subst_exstat; /* exit status of last $(..)/`..` */ 381 EXTERN const char *safe_prompt; /* safe prompt if PS1 substitution fails */ 382 383 384 /* 385 * Area-based allocation built on malloc/free 386 */ 387 388 typedef struct Area { 389 struct Block *freelist; /* free list */ 390 } Area; 391 392 EXTERN Area aperm; /* permanent object space */ 393 #define APERM &aperm 394 #define ATEMP &e->area 395 396 #ifdef MEM_DEBUG 397 # include "chmem.h" /* a debugging front end for malloc et. al. */ 398 #endif /* MEM_DEBUG */ 399 400 #ifdef KSH_DEBUG 401 # define kshdebug_init() kshdebug_init_() 402 # define kshdebug_printf(a) kshdebug_printf_ a 403 # define kshdebug_dump(a) kshdebug_dump_ a 404 #else /* KSH_DEBUG */ 405 # define kshdebug_init() 406 # define kshdebug_printf(a) 407 # define kshdebug_dump(a) 408 #endif /* KSH_DEBUG */ 409 410 411 /* 412 * parsing & execution environment 413 */ 414 EXTERN struct env { 415 short type; /* enviroment type - see below */ 416 short flags; /* EF_* */ 417 Area area; /* temporary allocation area */ 418 struct block *loc; /* local variables and functions */ 419 short *savefd; /* original redirected fd's */ 420 struct env *oenv; /* link to previous enviroment */ 421 ksh_jmp_buf jbuf; /* long jump back to env creator */ 422 struct temp *temps; /* temp files */ 423 } *e; 424 425 /* struct env.type values */ 426 #define E_NONE 0 /* dummy enviroment */ 427 #define E_PARSE 1 /* parsing command # */ 428 #define E_FUNC 2 /* executing function # */ 429 #define E_INCL 3 /* including a file via . # */ 430 #define E_EXEC 4 /* executing command tree */ 431 #define E_LOOP 5 /* executing for/while # */ 432 #define E_ERRH 6 /* general error handler # */ 433 /* # indicates env has valid jbuf (see unwind()) */ 434 435 /* struct env.flag values */ 436 #define EF_FUNC_PARSE BIT(0) /* function being parsed */ 437 #define EF_BRKCONT_PASS BIT(1) /* set if E_LOOP must pass break/continue on */ 438 #define EF_FAKE_SIGDIE BIT(2) /* hack to get info from unwind to quitenv */ 439 440 /* Do breaks/continues stop at env type e? */ 441 #define STOP_BRKCONT(t) ((t) == E_NONE || (t) == E_PARSE \ 442 || (t) == E_FUNC || (t) == E_INCL) 443 /* Do returns stop at env type e? */ 444 #define STOP_RETURN(t) ((t) == E_FUNC || (t) == E_INCL) 445 446 /* values for ksh_siglongjmp(e->jbuf, 0) */ 447 #define LRETURN 1 /* return statement */ 448 #define LEXIT 2 /* exit statement */ 449 #define LERROR 3 /* errorf() called */ 450 #define LLEAVE 4 /* untrappable exit/error */ 451 #define LINTR 5 /* ^C noticed */ 452 #define LBREAK 6 /* break statement */ 453 #define LCONTIN 7 /* continue statement */ 454 #define LSHELL 8 /* return to interactive shell() */ 455 #define LAEXPR 9 /* error in arithmetic expression */ 456 457 458 /* option processing */ 459 #define OF_CMDLINE 0x01 /* command line */ 460 #define OF_SET 0x02 /* set builtin */ 461 #define OF_SPECIAL 0x04 /* a special variable changing */ 462 #define OF_INTERNAL 0x08 /* set internally by shell */ 463 #define OF_ANY (OF_CMDLINE | OF_SET | OF_SPECIAL | OF_INTERNAL) 464 465 struct option { 466 const char *name; /* long name of option */ 467 char c; /* character flag (if any) */ 468 short flags; /* OF_* */ 469 }; 470 extern const struct option options[]; 471 472 /* 473 * flags (the order of these enums MUST match the order in misc.c(options[])) 474 */ 475 enum sh_flag { 476 FEXPORT = 0, /* -a: export all */ 477 #ifdef BRACE_EXPAND 478 FBRACEEXPAND, /* enable {} globbing */ 479 #endif 480 FBGNICE, /* bgnice */ 481 FCOMMAND, /* -c: (invocation) execute specified command */ 482 #ifdef EMACS 483 FEMACS, /* emacs command editing */ 484 #endif 485 FERREXIT, /* -e: quit on error */ 486 #ifdef EMACS 487 FGMACS, /* gmacs command editing */ 488 #endif 489 FIGNOREEOF, /* eof does not exit */ 490 FTALKING, /* -i: interactive */ 491 FKEYWORD, /* -k: name=value anywere */ 492 FLOGIN, /* -l: a login shell */ 493 FMARKDIRS, /* mark dirs with / in file name completion */ 494 FMONITOR, /* -m: job control monitoring */ 495 FNOCLOBBER, /* -C: don't overwrite existing files */ 496 FNOEXEC, /* -n: don't execute any commands */ 497 FNOGLOB, /* -f: don't do file globbing */ 498 FNOHUP, /* -H: don't kill running jobs when login shell exits */ 499 FNOTTALKING, /* -I: don't be interactive */ 500 FNOLOG, /* don't save functions in history (ignored) */ 501 #ifdef JOBS 502 FNOTIFY, /* -b: asynchronous job completion notification */ 503 #endif 504 FNOUNSET, /* -u: using an unset var is an error */ 505 FPHYSICAL, /* -o physical: don't do logical cd's/pwd's */ 506 FPOSIX, /* -o posix: be posixly correct */ 507 FPRIVILEGED, /* -p: use suid_profile */ 508 FRESTRICTED, /* -r: restricted shell */ 509 FSTDIN, /* -s: (invocation) parse stdin */ 510 FTRACKALL, /* -h: create tracked aliases for all commands */ 511 FVERBOSE, /* -v: echo input */ 512 #ifdef VI 513 FVI, /* vi command editing */ 514 FVIRAW, /* always read in raw mode (ignored) */ 515 FVISHOW8, /* display chars with 8th bit set as is (versus M-) */ 516 FVITABCOMPLETE, /* enable tab as file name completion char */ 517 FVIESCCOMPLETE, /* enable ESC as file name completion in command mode */ 518 #endif 519 FXTRACE, /* -x: execution trace */ 520 FTALKING_I, /* (internal): initial shell was interactive */ 521 FNFLAGS /* (place holder: how many flags are there) */ 522 }; 523 524 #define Flag(f) (shell_flags[(int) (f)]) 525 526 EXTERN char shell_flags [FNFLAGS]; 527 528 EXTERN char null [] I__(""); /* null value for variable */ 529 EXTERN char space [] I__(" "); 530 EXTERN char newline [] I__("\n"); 531 EXTERN char slash [] I__("/"); 532 533 enum temp_type { 534 TT_HEREDOC_EXP, /* expanded heredoc */ 535 TT_HIST_EDIT /* temp file used for history editing (fc -e) */ 536 }; 537 typedef enum temp_type Temp_type; 538 /* temp/heredoc files. The file is removed when the struct is freed. */ 539 struct temp { 540 struct temp *next; 541 struct shf *shf; 542 int pid; /* pid of process parsed here-doc */ 543 Temp_type type; 544 char *name; 545 }; 546 547 /* 548 * stdio and our IO routines 549 */ 550 551 #define shl_spare (&shf_iob[0]) /* for c_read()/c_print() */ 552 #define shl_stdout (&shf_iob[1]) 553 #define shl_out (&shf_iob[2]) 554 EXTERN int shl_stdout_ok; 555 556 /* 557 * trap handlers 558 */ 559 typedef struct trap { 560 int signal; /* signal number */ 561 const char *name; /* short name */ 562 const char *mess; /* descriptive name */ 563 char *trap; /* trap command */ 564 int volatile set; /* trap pending */ 565 int flags; /* TF_* */ 566 handler_t cursig; /* current handler (valid if TF_ORIG_* set) */ 567 handler_t shtrap; /* shell signal handler */ 568 } Trap; 569 570 /* values for Trap.flags */ 571 #define TF_SHELL_USES BIT(0) /* shell uses signal, user can't change */ 572 #define TF_USER_SET BIT(1) /* user has (tried to) set trap */ 573 #define TF_ORIG_IGN BIT(2) /* original action was SIG_IGN */ 574 #define TF_ORIG_DFL BIT(3) /* original action was SIG_DFL */ 575 #define TF_EXEC_IGN BIT(4) /* restore SIG_IGN just before exec */ 576 #define TF_EXEC_DFL BIT(5) /* restore SIG_DFL just before exec */ 577 #define TF_DFL_INTR BIT(6) /* when received, default action is LINTR */ 578 #define TF_TTY_INTR BIT(7) /* tty generated signal (see j_waitj) */ 579 #define TF_CHANGED BIT(8) /* used by runtrap() to detect trap changes */ 580 #define TF_FATAL BIT(9) /* causes termination if not trapped */ 581 582 /* values for setsig()/setexecsig() flags argument */ 583 #define SS_RESTORE_MASK 0x3 /* how to restore a signal before an exec() */ 584 #define SS_RESTORE_CURR 0 /* leave current handler in place */ 585 #define SS_RESTORE_ORIG 1 /* restore original handler */ 586 #define SS_RESTORE_DFL 2 /* restore to SIG_DFL */ 587 #define SS_RESTORE_IGN 3 /* restore to SIG_IGN */ 588 #define SS_FORCE BIT(3) /* set signal even if original signal ignored */ 589 #define SS_USER BIT(4) /* user is doing the set (ie, trap command) */ 590 #define SS_SHTRAP BIT(5) /* trap for internal use (CHLD,ALRM,WINCH) */ 591 592 #define SIGEXIT_ 0 /* for trap EXIT */ 593 #define SIGERR_ SIGNALS /* for trap ERR */ 594 595 EXTERN int volatile trap; /* traps pending? */ 596 EXTERN int volatile intrsig; /* pending trap interrupts executing command */ 597 EXTERN int volatile fatal_trap;/* received a fatal signal */ 598 #ifndef FROM_TRAP_C 599 /* Kludge to avoid bogus re-declaration of sigtraps[] error on AIX 3.2.5 */ 600 extern Trap sigtraps[SIGNALS+1]; 601 #endif /* !FROM_TRAP_C */ 602 603 604 #ifdef KSH 605 /* 606 * TMOUT support 607 */ 608 /* values for ksh_tmout_state */ 609 enum tmout_enum { 610 TMOUT_EXECUTING = 0, /* executing commands */ 611 TMOUT_READING, /* waiting for input */ 612 TMOUT_LEAVING /* have timed out */ 613 }; 614 EXTERN unsigned int ksh_tmout; 615 EXTERN enum tmout_enum ksh_tmout_state I__(TMOUT_EXECUTING); 616 #endif /* KSH */ 617 618 619 /* For "You have stopped jobs" message */ 620 EXTERN int really_exit; 621 622 623 /* 624 * fast character classes 625 */ 626 #define C_ALPHA BIT(0) /* a-z_A-Z */ 627 #define C_DIGIT BIT(1) /* 0-9 */ 628 #define C_LEX1 BIT(2) /* \0 \t\n|&;<>() */ 629 #define C_VAR1 BIT(3) /* *@#!$-? */ 630 #define C_IFSWS BIT(4) /* \t \n (IFS white space) */ 631 #define C_SUBOP1 BIT(5) /* "=-+?" */ 632 #define C_SUBOP2 BIT(6) /* "#%" */ 633 #define C_IFS BIT(7) /* $IFS */ 634 #define C_QUOTE BIT(8) /* \n\t"#$&'()*;<>?[\`| (needing quoting) */ 635 636 extern short ctypes []; 637 638 #define ctype(c, t) !!(ctypes[(unsigned char)(c)]&(t)) 639 #define letter(c) ctype(c, C_ALPHA) 640 #define digit(c) ctype(c, C_DIGIT) 641 #define letnum(c) ctype(c, C_ALPHA|C_DIGIT) 642 643 EXTERN int ifs0 I__(' '); /* for "$*" */ 644 645 646 /* Argument parsing for built-in commands and getopts command */ 647 648 /* Values for Getopt.flags */ 649 #define GF_ERROR BIT(0) /* call errorf() if there is an error */ 650 #define GF_PLUSOPT BIT(1) /* allow +c as an option */ 651 #define GF_NONAME BIT(2) /* don't print argv[0] in errors */ 652 653 /* Values for Getopt.info */ 654 #define GI_MINUS BIT(0) /* an option started with -... */ 655 #define GI_PLUS BIT(1) /* an option started with +... */ 656 #define GI_MINUSMINUS BIT(2) /* arguments were ended with -- */ 657 658 typedef struct { 659 int optind; 660 int uoptind;/* what user sees in $OPTIND */ 661 char *optarg; 662 int flags; /* see GF_* */ 663 int info; /* see GI_* */ 664 unsigned int p; /* 0 or index into argv[optind - 1] */ 665 char buf[2]; /* for bad option OPTARG value */ 666 } Getopt; 667 668 EXTERN Getopt builtin_opt; /* for shell builtin commands */ 669 EXTERN Getopt user_opt; /* parsing state for getopts builtin command */ 670 671 672 #ifdef KSH 673 /* This for co-processes */ 674 675 typedef INT32 Coproc_id; /* something that won't (realisticly) wrap */ 676 struct coproc { 677 int read; /* pipe from co-process's stdout */ 678 int readw; /* other side of read (saved temporarily) */ 679 int write; /* pipe to co-process's stdin */ 680 Coproc_id id; /* id of current output pipe */ 681 int njobs; /* number of live jobs using output pipe */ 682 void *job; /* 0 or job of co-process using input pipe */ 683 }; 684 EXTERN struct coproc coproc; 685 #endif /* KSH */ 686 687 /* Used in jobs.c and by coprocess stuff in exec.c */ 688 #ifdef JOB_SIGS 689 EXTERN sigset_t sm_default, sm_sigchld; 690 #endif /* JOB_SIGS */ 691 692 extern const char ksh_version[]; 693 694 /* name of called builtin function (used by error functions) */ 695 EXTERN char *builtin_argv0; 696 EXTERN Tflag builtin_flag; /* flags of called builtin (SPEC_BI, etc.) */ 697 698 /* current working directory, and size of memory allocated for same */ 699 EXTERN char *current_wd; 700 EXTERN int current_wd_size; 701 702 #ifdef EDIT 703 /* Minimium required space to work with on a line - if the prompt leaves less 704 * space than this on a line, the prompt is truncated. 705 */ 706 # define MIN_EDIT_SPACE 7 707 /* Minimium allowed value for x_cols: 2 for prompt, 3 for " < " at end of line 708 */ 709 # define MIN_COLS (2 + MIN_EDIT_SPACE + 3) 710 EXTERN int x_cols I__(80); /* tty columns */ 711 #else 712 # define x_cols 80 /* for pr_menu(exec.c) */ 713 #endif 714 715 716 /* These to avoid bracket matching problems */ 717 #define OPAREN '(' 718 #define CPAREN ')' 719 #define OBRACK '[' 720 #define CBRACK ']' 721 #define OBRACE '{' 722 #define CBRACE '}' 723 724 /* Determine the location of the system (common) profile */ 725 #ifndef KSH_SYSTEM_PROFILE 726 # ifdef __NeXT 727 # define KSH_SYSTEM_PROFILE "/etc/profile.std" 728 # else /* __NeXT */ 729 # define KSH_SYSTEM_PROFILE "/etc/profile" 730 # endif /* __NeXT */ 731 #endif /* KSH_SYSTEM_PROFILE */ 732 733 /* Used by v_evaluate() and setstr() to control action when error occurs */ 734 #define KSH_UNWIND_ERROR 0 /* unwind the stack (longjmp) */ 735 #define KSH_RETURN_ERROR 1 /* return 1/0 for success/failure */ 736 737 #include "shf.h" 738 #include "table.h" 739 #include "tree.h" 740 #include "expand.h" 741 #include "lex.h" 742 #include "proto.h" 743 744 /* be sure not to interfere with anyone else's idea about EXTERN */ 745 #ifdef EXTERN_DEFINED 746 # undef EXTERN_DEFINED 747 # undef EXTERN 748 #endif 749 #undef I__ 750