1 /* $NetBSD: sh.h,v 1.7 2005/06/26 19:09:00 christos Exp $ */ 2 3 /* 4 * Public Domain Bourne/Korn shell 5 */ 6 7 /* $Id: sh.h,v 1.7 2005/06/26 19:09:00 christos Exp $ */ 8 9 #include "config.h" /* system and option configuration info */ 10 11 #ifdef HAVE_PROTOTYPES 12 # define ARGS(args) args /* prototype declaration */ 13 #else 14 # define ARGS(args) () /* K&R declaration */ 15 #endif 16 17 /* Start of common headers */ 18 19 #include <stdio.h> 20 #include <sys/types.h> 21 #include <setjmp.h> 22 #ifdef HAVE_STDDEF_H 23 # include <stddef.h> 24 #endif 25 26 #ifdef HAVE_STDLIB_H 27 # include <stdlib.h> 28 #else 29 /* just a useful subset of what stdlib.h would have */ 30 extern char * getenv ARGS((const char *)); 31 extern void * malloc ARGS((size_t)); 32 extern void * realloc ARGS((void *, size_t)); 33 extern int free ARGS((void *)); 34 extern int exit ARGS((int)); 35 extern int rand ARGS((void)); 36 extern void srand ARGS((unsigned int)); 37 extern int atoi ARGS((const char *)); 38 #endif /* HAVE_STDLIB_H */ 39 40 #ifdef HAVE_UNISTD_H 41 # include <unistd.h> 42 #else 43 /* just a useful subset of what unistd.h would have */ 44 extern int access ARGS((const char *, int)); 45 extern int open ARGS((const char *, int, ...)); 46 extern int creat ARGS((const char *, mode_t)); 47 extern int read ARGS((int, char *, unsigned)); 48 extern int write ARGS((int, const char *, unsigned)); 49 extern off_t lseek ARGS((int, off_t, int)); 50 extern int close ARGS((int)); 51 extern int pipe ARGS((int [])); 52 extern int dup2 ARGS((int, int)); 53 extern int unlink ARGS((const char *)); 54 extern int fork ARGS((void)); 55 extern int execve ARGS((const char *, char * const[], char * const[])); 56 extern int chdir ARGS((const char *)); 57 extern int kill ARGS((pid_t, int)); 58 extern char *getcwd(); /* no ARGS here - differs on different machines */ 59 extern int geteuid ARGS((void)); 60 extern int readlink ARGS((const char *, char *, int)); 61 extern int getegid ARGS((void)); 62 extern int getpid ARGS((void)); 63 extern int getppid ARGS((void)); 64 extern unsigned int sleep ARGS((unsigned int)); 65 extern int isatty ARGS((int)); 66 # ifdef POSIX_PGRP 67 extern int getpgrp ARGS((void)); 68 extern int setpgid ARGS((pid_t, pid_t)); 69 # endif /* POSIX_PGRP */ 70 # ifdef BSD_PGRP 71 extern int getpgrp ARGS((pid_t)); 72 extern int setpgrp ARGS((pid_t, pid_t)); 73 # endif /* BSD_PGRP */ 74 # ifdef SYSV_PGRP 75 extern int getpgrp ARGS((void)); 76 extern int setpgrp ARGS((void)); 77 # endif /* SYSV_PGRP */ 78 #endif /* HAVE_UNISTD_H */ 79 80 #ifdef HAVE_STRING_H 81 # include <string.h> 82 #else 83 # include <strings.h> 84 # define strchr index 85 # define strrchr rindex 86 #endif /* HAVE_STRING_H */ 87 #ifndef HAVE_STRSTR 88 char *strstr ARGS((const char *s, const char *p)); 89 #endif /* HAVE_STRSTR */ 90 #ifndef HAVE_STRCASECMP 91 int strcasecmp ARGS((const char *s1, const char *s2)); 92 int strncasecmp ARGS((const char *s1, const char *s2, int n)); 93 #endif /* HAVE_STRCASECMP */ 94 95 #ifdef HAVE_MEMORY_H 96 # include <memory.h> 97 #endif 98 #ifndef HAVE_MEMSET 99 # define memcpy(d, s, n) bcopy(s, d, n) 100 # define memcmp(s1, s2, n) bcmp(s1, s2, n) 101 void *memset ARGS((void *d, int c, size_t n)); 102 #endif /* HAVE_MEMSET */ 103 #ifndef HAVE_MEMMOVE 104 # ifdef HAVE_BCOPY 105 # define memmove(d, s, n) bcopy(s, d, n) 106 # else 107 void *memmove ARGS((void *d, const void *s, size_t n)); 108 # endif 109 #endif /* HAVE_MEMMOVE */ 110 111 #ifdef HAVE_PROTOTYPES 112 # include <stdarg.h> 113 # define SH_VA_START(va, argn) va_start(va, argn) 114 #else 115 # include <varargs.h> 116 # define SH_VA_START(va, argn) va_start(va) 117 #endif /* HAVE_PROTOTYPES */ 118 119 #include <errno.h> 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 #if SIZEOF_INT >= 4 249 # define INT32 int 250 #else /* SIZEOF_INT */ 251 # if SIZEOF_LONG >= 4 252 # define INT32 long 253 # else /* SIZEOF_LONG */ 254 #error cannot find 32 bit type... 255 # endif /* SIZEOF_LONG */ 256 #endif /* SIZEOF_INT */ 257 258 /* end of common headers */ 259 260 /* Stop gcc and lint from complaining about possibly uninitialized variables */ 261 #if defined(__GNUC__) || defined(lint) 262 # define UNINITIALIZED(var) var = 0 263 #else 264 # define UNINITIALIZED(var) var 265 #endif /* GNUC || lint */ 266 267 /* some useful #defines */ 268 #ifdef EXTERN 269 # define I__(i) = i 270 #else 271 # define I__(i) 272 # define EXTERN extern 273 # define EXTERN_DEFINED 274 #endif 275 276 #ifdef OS2 277 # define inDOS() (!(_emx_env & 0x200)) 278 #endif 279 280 #ifndef EXECSHELL 281 /* shell to exec scripts (see also $SHELL initialization in main.c) */ 282 # ifdef OS2 283 # define EXECSHELL (inDOS() ? "c:\\command.com" : "c:\\os2\\cmd.exe") 284 # define EXECSHELL_STR (inDOS() ? "COMSPEC" : "OS2_SHELL") 285 # else /* OS2 */ 286 # define EXECSHELL "/bin/sh" 287 # define EXECSHELL_STR "EXECSHELL" 288 # endif /* OS2 */ 289 #endif 290 291 /* ISABSPATH() means path is fully and completely specified, 292 * ISROOTEDPATH() means a .. as the first component is a no-op, 293 * ISRELPATH() means $PWD can be tacked on to get an absolute path. 294 * 295 * OS Path ISABSPATH ISROOTEDPATH ISRELPATH 296 * unix /foo yes yes no 297 * unix foo no no yes 298 * unix ../foo no no yes 299 * os2+cyg a:/foo yes yes no 300 * os2+cyg a:foo no no no 301 * os2+cyg /foo no yes no 302 * os2+cyg foo no no yes 303 * os2+cyg ../foo no no yes 304 * cyg //foo yes yes no 305 */ 306 #ifdef OS2 307 # define PATHSEP ';' 308 # define DIRSEP '/' /* even though \ is native */ 309 # define DIRSEPSTR "\\" 310 # define ISDIRSEP(c) ((c) == '\\' || (c) == '/') 311 # define ISABSPATH(s) (((s)[0] && (s)[1] == ':' && ISDIRSEP((s)[2]))) 312 # define ISROOTEDPATH(s) (ISDIRSEP((s)[0]) || ISABSPATH(s)) 313 # define ISRELPATH(s) (!(s)[0] || ((s)[1] != ':' && !ISDIRSEP((s)[0]))) 314 # define FILECHCONV(c) (isascii(c) && isupper(c) ? tolower(c) : c) 315 # define FILECMP(s1, s2) stricmp(s1, s2) 316 # define FILENCMP(s1, s2, n) strnicmp(s1, s2, n) 317 extern char *ksh_strchr_dirsep(const char *path); 318 extern char *ksh_strrchr_dirsep(const char *path); 319 # define chdir _chdir2 320 # define getcwd _getcwd2 321 #else 322 # define PATHSEP ':' 323 # define DIRSEP '/' 324 # define DIRSEPSTR "/" 325 # define ISDIRSEP(c) ((c) == '/') 326 #ifdef __CYGWIN__ 327 # define ISABSPATH(s) \ 328 (((s)[0] && (s)[1] == ':' && ISDIRSEP((s)[2])) || ISDIRSEP((s)[0])) 329 # define ISRELPATH(s) (!(s)[0] || ((s)[1] != ':' && !ISDIRSEP((s)[0]))) 330 #else /* __CYGWIN__ */ 331 # define ISABSPATH(s) ISDIRSEP((s)[0]) 332 # define ISRELPATH(s) (!ISABSPATH(s)) 333 #endif /* __CYGWIN__ */ 334 # define ISROOTEDPATH(s) ISABSPATH(s) 335 # define FILECHCONV(c) c 336 # define FILECMP(s1, s2) strcmp(s1, s2) 337 # define FILENCMP(s1, s2, n) strncmp(s1, s2, n) 338 # define ksh_strchr_dirsep(p) strchr(p, DIRSEP) 339 # define ksh_strrchr_dirsep(p) strrchr(p, DIRSEP) 340 #endif 341 342 typedef int bool_t; 343 #define FALSE 0 344 #define TRUE 1 345 346 #define NELEM(a) (sizeof(a) / sizeof((a)[0])) 347 #define sizeofN(type, n) (sizeof(type) * (n)) 348 #define BIT(i) (1<<(i)) /* define bit in flag */ 349 350 /* Table flag type - needs > 16 and < 32 bits */ 351 typedef INT32 Tflag; 352 353 #define NUFILE 32 /* Number of user-accessible files */ 354 #define FDBASE 10 /* First file usable by Shell */ 355 356 /* you're not going to run setuid shell scripts, are you? */ 357 #define eaccess(path, mode) access(path, mode) 358 359 /* Make MAGIC a char that might be printed to make bugs more obvious, but 360 * not a char that is used often. Also, can't use the high bit as it causes 361 * portability problems (calling strchr(x, 0x80|'x') is error prone). 362 */ 363 #define MAGIC (7) /* prefix for *?[!{,} during expand */ 364 #define ISMAGIC(c) ((unsigned char)(c) == MAGIC) 365 #define NOT '!' /* might use ^ (ie, [!...] vs [^..]) */ 366 367 #define LINE 1024 /* input line size */ 368 #define PATH 1024 /* pathname size (todo: PATH_MAX/pathconf()) */ 369 #define ARRAYMAX 1023 /* max array index */ 370 371 EXTERN const char *kshname; /* $0 */ 372 EXTERN pid_t kshpid; /* $$, shell pid */ 373 EXTERN pid_t procpid; /* pid of executing process */ 374 EXTERN uid_t ksheuid; /* effective uid of shell */ 375 EXTERN int exstat; /* exit status */ 376 EXTERN int subst_exstat; /* exit status of last $(..)/`..` */ 377 EXTERN const char *safe_prompt; /* safe prompt if PS1 substitution fails */ 378 379 /* 380 * Area-based allocation built on malloc/free 381 */ 382 typedef struct Area { 383 struct link *freelist; /* free list */ 384 } Area; 385 386 EXTERN Area aperm; /* permanent object space */ 387 #define APERM &aperm 388 #define ATEMP &e->area 389 390 #ifdef MEM_DEBUG 391 # include "chmem.h" /* a debugging front end for malloc et. al. */ 392 #endif /* MEM_DEBUG */ 393 394 #ifdef KSH_DEBUG 395 # define kshdebug_init() kshdebug_init_() 396 # define kshdebug_printf(a) kshdebug_printf_ a 397 # define kshdebug_dump(a) kshdebug_dump_ a 398 #else /* KSH_DEBUG */ 399 # define kshdebug_init() 400 # define kshdebug_printf(a) 401 # define kshdebug_dump(a) 402 #endif /* KSH_DEBUG */ 403 404 /* 405 * parsing & execution environment 406 */ 407 EXTERN struct env { 408 short type; /* environment type - see below */ 409 short flags; /* EF_* */ 410 Area area; /* temporary allocation area */ 411 struct block *loc; /* local variables and functions */ 412 short *savefd; /* original redirected fd's */ 413 struct env *oenv; /* link to previous environment */ 414 ksh_jmp_buf jbuf; /* long jump back to env creator */ 415 struct temp *temps; /* temp files */ 416 } *e; 417 418 /* struct env.type values */ 419 #define E_NONE 0 /* dummy environment */ 420 #define E_PARSE 1 /* parsing command # */ 421 #define E_FUNC 2 /* executing function # */ 422 #define E_INCL 3 /* including a file via . # */ 423 #define E_EXEC 4 /* executing command tree */ 424 #define E_LOOP 5 /* executing for/while # */ 425 #define E_ERRH 6 /* general error handler # */ 426 /* # indicates env has valid jbuf (see unwind()) */ 427 428 /* struct env.flag values */ 429 #define EF_FUNC_PARSE BIT(0) /* function being parsed */ 430 #define EF_BRKCONT_PASS BIT(1) /* set if E_LOOP must pass break/continue on */ 431 #define EF_FAKE_SIGDIE BIT(2) /* hack to get info from unwind to quitenv */ 432 433 /* Do breaks/continues stop at env type e? */ 434 #define STOP_BRKCONT(t) ((t) == E_NONE || (t) == E_PARSE \ 435 || (t) == E_FUNC || (t) == E_INCL) 436 /* Do returns stop at env type e? */ 437 #define STOP_RETURN(t) ((t) == E_FUNC || (t) == E_INCL) 438 439 /* values for ksh_siglongjmp(e->jbuf, 0) */ 440 #define LRETURN 1 /* return statement */ 441 #define LEXIT 2 /* exit statement */ 442 #define LERROR 3 /* errorf() called */ 443 #define LLEAVE 4 /* untrappable exit/error */ 444 #define LINTR 5 /* ^C noticed */ 445 #define LBREAK 6 /* break statement */ 446 #define LCONTIN 7 /* continue statement */ 447 #define LSHELL 8 /* return to interactive shell() */ 448 #define LAEXPR 9 /* error in arithmetic expression */ 449 450 /* option processing */ 451 #define OF_CMDLINE 0x01 /* command line */ 452 #define OF_SET 0x02 /* set builtin */ 453 #define OF_SPECIAL 0x04 /* a special variable changing */ 454 #define OF_INTERNAL 0x08 /* set internally by shell */ 455 #define OF_ANY (OF_CMDLINE | OF_SET | OF_SPECIAL | OF_INTERNAL) 456 457 struct option { 458 const char *name; /* long name of option */ 459 char c; /* character flag (if any) */ 460 short flags; /* OF_* */ 461 }; 462 extern const struct option goptions[]; 463 464 /* 465 * flags (the order of these enums MUST match the order in misc.c(options[])) 466 */ 467 enum sh_flag { 468 FEXPORT = 0, /* -a: export all */ 469 #ifdef BRACE_EXPAND 470 FBRACEEXPAND, /* enable {} globbing */ 471 #endif 472 FBGNICE, /* bgnice */ 473 FCOMMAND, /* -c: (invocation) execute specified command */ 474 #ifdef EMACS 475 FEMACS, /* emacs command editing */ 476 FEMACSUSEMETA, /* use 8th bit as meta */ 477 #endif 478 FERREXIT, /* -e: quit on error */ 479 #ifdef EMACS 480 FGMACS, /* gmacs command editing */ 481 #endif 482 FIGNOREEOF, /* eof does not exit */ 483 FTALKING, /* -i: interactive */ 484 FKEYWORD, /* -k: name=value anywhere */ 485 FLOGIN, /* -l: a login shell */ 486 FMARKDIRS, /* mark dirs with / in file name completion */ 487 FMONITOR, /* -m: job control monitoring */ 488 FNOCLOBBER, /* -C: don't overwrite existing files */ 489 FNOEXEC, /* -n: don't execute any commands */ 490 FNOGLOB, /* -f: don't do file globbing */ 491 FNOHUP, /* -H: don't kill running jobs when login shell exits */ 492 FNOLOG, /* don't save functions in history (ignored) */ 493 #ifdef JOBS 494 FNOTIFY, /* -b: asynchronous job completion notification */ 495 #endif 496 FNOUNSET, /* -u: using an unset var is an error */ 497 FPHYSICAL, /* -o physical: don't do logical cd's/pwd's */ 498 FPOSIX, /* -o posix: be posixly correct */ 499 FPRIVILEGED, /* -p: use suid_profile */ 500 FRESTRICTED, /* -r: restricted shell */ 501 FSTDIN, /* -s: (invocation) parse stdin */ 502 FTRACKALL, /* -h: create tracked aliases for all commands */ 503 FVERBOSE, /* -v: echo input */ 504 #ifdef VI 505 FVI, /* vi command editing */ 506 FVIRAW, /* always read in raw mode (ignored) */ 507 FVISHOW8, /* display chars with 8th bit set as is (versus M-) */ 508 FVITABCOMPLETE, /* enable tab as file name completion char */ 509 FVIESCCOMPLETE, /* enable ESC as file name completion in command mode */ 510 #endif 511 FXTRACE, /* -x: execution trace */ 512 FTALKING_I, /* (internal): initial shell was interactive */ 513 FNFLAGS /* (place holder: how many flags are there) */ 514 }; 515 516 #define Flag(f) (shell_flags[(int) (f)]) 517 518 EXTERN char shell_flags [FNFLAGS]; 519 520 EXTERN char null [] I__(""); /* null value for variable */ 521 EXTERN char space [] I__(" "); 522 EXTERN char newline [] I__("\n"); 523 EXTERN char slash [] I__("/"); 524 525 enum temp_type { 526 TT_HEREDOC_EXP, /* expanded heredoc */ 527 TT_HIST_EDIT /* temp file used for history editing (fc -e) */ 528 }; 529 typedef enum temp_type Temp_type; 530 /* temp/heredoc files. The file is removed when the struct is freed. */ 531 struct temp { 532 struct temp *next; 533 struct shf *shf; 534 int pid; /* pid of process parsed here-doc */ 535 Temp_type type; 536 char *name; 537 }; 538 539 /* 540 * stdio and our IO routines 541 */ 542 543 #define shl_spare (&shf_iob[0]) /* for c_read()/c_print() */ 544 #define shl_stdout (&shf_iob[1]) 545 #define shl_out (&shf_iob[2]) 546 EXTERN int shl_stdout_ok; 547 548 /* 549 * trap handlers 550 */ 551 typedef struct trap { 552 int signal; /* signal number */ 553 const char *name; /* short name */ 554 const char *mess; /* descriptive name */ 555 char *trap; /* trap command */ 556 int volatile set; /* trap pending */ 557 int flags; /* TF_* */ 558 handler_t cursig; /* current handler (valid if TF_ORIG_* set) */ 559 handler_t shtrap; /* shell signal handler */ 560 } Trap; 561 562 /* values for Trap.flags */ 563 #define TF_SHELL_USES BIT(0) /* shell uses signal, user can't change */ 564 #define TF_USER_SET BIT(1) /* user has (tried to) set trap */ 565 #define TF_ORIG_IGN BIT(2) /* original action was SIG_IGN */ 566 #define TF_ORIG_DFL BIT(3) /* original action was SIG_DFL */ 567 #define TF_EXEC_IGN BIT(4) /* restore SIG_IGN just before exec */ 568 #define TF_EXEC_DFL BIT(5) /* restore SIG_DFL just before exec */ 569 #define TF_DFL_INTR BIT(6) /* when received, default action is LINTR */ 570 #define TF_TTY_INTR BIT(7) /* tty generated signal (see j_waitj) */ 571 #define TF_CHANGED BIT(8) /* used by runtrap() to detect trap changes */ 572 #define TF_FATAL BIT(9) /* causes termination if not trapped */ 573 574 /* values for setsig()/setexecsig() flags argument */ 575 #define SS_RESTORE_MASK 0x3 /* how to restore a signal before an exec() */ 576 #define SS_RESTORE_CURR 0 /* leave current handler in place */ 577 #define SS_RESTORE_ORIG 1 /* restore original handler */ 578 #define SS_RESTORE_DFL 2 /* restore to SIG_DFL */ 579 #define SS_RESTORE_IGN 3 /* restore to SIG_IGN */ 580 #define SS_FORCE BIT(3) /* set signal even if original signal ignored */ 581 #define SS_USER BIT(4) /* user is doing the set (ie, trap command) */ 582 #define SS_SHTRAP BIT(5) /* trap for internal use (CHLD,ALRM,WINCH) */ 583 584 #define SIGEXIT_ 0 /* for trap EXIT */ 585 #define SIGERR_ SIGNALS /* for trap ERR */ 586 587 EXTERN int volatile trap; /* traps pending? */ 588 EXTERN int volatile intrsig; /* pending trap interrupts executing command */ 589 EXTERN int volatile fatal_trap;/* received a fatal signal */ 590 #ifndef FROM_TRAP_C 591 /* Kludge to avoid bogus re-declaration of sigtraps[] error on AIX 3.2.5 */ 592 extern Trap sigtraps[SIGNALS+1]; 593 #endif /* !FROM_TRAP_C */ 594 595 #ifdef KSH 596 /* 597 * TMOUT support 598 */ 599 /* values for ksh_tmout_state */ 600 enum tmout_enum { 601 TMOUT_EXECUTING = 0, /* executing commands */ 602 TMOUT_READING, /* waiting for input */ 603 TMOUT_LEAVING /* have timed out */ 604 }; 605 EXTERN unsigned int ksh_tmout; 606 EXTERN enum tmout_enum ksh_tmout_state I__(TMOUT_EXECUTING); 607 #endif /* KSH */ 608 609 /* For "You have stopped jobs" message */ 610 EXTERN int really_exit; 611 612 /* 613 * fast character classes 614 */ 615 #define C_ALPHA BIT(0) /* a-z_A-Z */ 616 #define C_DIGIT BIT(1) /* 0-9 */ 617 #define C_LEX1 BIT(2) /* \0 \t\n|&;<>() */ 618 #define C_VAR1 BIT(3) /* *@#!$-? */ 619 #define C_IFSWS BIT(4) /* \t \n (IFS white space) */ 620 #define C_SUBOP1 BIT(5) /* "=-+?" */ 621 #define C_SUBOP2 BIT(6) /* "#%" */ 622 #define C_IFS BIT(7) /* $IFS */ 623 #define C_QUOTE BIT(8) /* \n\t"#$&'()*;<>?[\`| (needing quoting) */ 624 625 extern short ctypes []; 626 627 #define ctype(c, t) !!(ctypes[(unsigned char)(c)]&(t)) 628 #define letter(c) ctype(c, C_ALPHA) 629 #define digit(c) ctype(c, C_DIGIT) 630 #define letnum(c) ctype(c, C_ALPHA|C_DIGIT) 631 632 EXTERN int ifs0 I__(' '); /* for "$*" */ 633 634 /* Argument parsing for built-in commands and getopts command */ 635 636 /* Values for Getopt.flags */ 637 #define GF_ERROR BIT(0) /* call errorf() if there is an error */ 638 #define GF_PLUSOPT BIT(1) /* allow +c as an option */ 639 #define GF_NONAME BIT(2) /* don't print argv[0] in errors */ 640 641 /* Values for Getopt.info */ 642 #define GI_MINUS BIT(0) /* an option started with -... */ 643 #define GI_PLUS BIT(1) /* an option started with +... */ 644 #define GI_MINUSMINUS BIT(2) /* arguments were ended with -- */ 645 646 typedef struct { 647 int optind; 648 int uoptind;/* what user sees in $OPTIND */ 649 char *optarg; 650 int flags; /* see GF_* */ 651 int info; /* see GI_* */ 652 unsigned int p; /* 0 or index into argv[optind - 1] */ 653 char buf[2]; /* for bad option OPTARG value */ 654 } Getopt; 655 656 EXTERN Getopt builtin_opt; /* for shell builtin commands */ 657 EXTERN Getopt user_opt; /* parsing state for getopts builtin command */ 658 659 #ifdef KSH 660 /* This for co-processes */ 661 662 typedef INT32 Coproc_id; /* something that won't (realisticly) wrap */ 663 struct coproc { 664 int read; /* pipe from co-process's stdout */ 665 int readw; /* other side of read (saved temporarily) */ 666 int write; /* pipe to co-process's stdin */ 667 Coproc_id id; /* id of current output pipe */ 668 int njobs; /* number of live jobs using output pipe */ 669 void *job; /* 0 or job of co-process using input pipe */ 670 }; 671 EXTERN struct coproc coproc; 672 #endif /* KSH */ 673 674 /* Used in jobs.c and by coprocess stuff in exec.c */ 675 #ifdef JOB_SIGS 676 EXTERN sigset_t sm_default, sm_sigchld; 677 #endif /* JOB_SIGS */ 678 679 extern char ksh_version[]; 680 681 /* name of called builtin function (used by error functions) */ 682 EXTERN char *builtin_argv0; 683 EXTERN Tflag builtin_flag; /* flags of called builtin (SPEC_BI, etc.) */ 684 685 /* current working directory, and size of memory allocated for same */ 686 EXTERN char *current_wd; 687 EXTERN int current_wd_size; 688 689 #ifdef EDIT 690 /* Minimum required space to work with on a line - if the prompt leaves less 691 * space than this on a line, the prompt is truncated. 692 */ 693 # define MIN_EDIT_SPACE 7 694 /* Minimum allowed value for x_cols: 2 for prompt, 3 for " < " at end of line 695 */ 696 # define MIN_COLS (2 + MIN_EDIT_SPACE + 3) 697 EXTERN int x_cols I__(80); /* tty columns */ 698 #else 699 # define x_cols 80 /* for pr_menu(exec.c) */ 700 #endif 701 702 /* These to avoid bracket matching problems */ 703 #define OPAREN '(' 704 #define CPAREN ')' 705 #define OBRACK '[' 706 #define CBRACK ']' 707 #define OBRACE '{' 708 #define CBRACE '}' 709 710 /* Determine the location of the system (common) profile */ 711 #ifndef KSH_SYSTEM_PROFILE 712 # ifdef __NeXT 713 # define KSH_SYSTEM_PROFILE "/etc/profile.std" 714 # else /* __NeXT */ 715 # define KSH_SYSTEM_PROFILE "/etc/profile" 716 # endif /* __NeXT */ 717 #endif /* KSH_SYSTEM_PROFILE */ 718 719 /* Used by v_evaluate() and setstr() to control action when error occurs */ 720 #define KSH_UNWIND_ERROR 0 /* unwind the stack (longjmp) */ 721 #define KSH_RETURN_ERROR 1 /* return 1/0 for success/failure */ 722 723 #include "shf.h" 724 #include "table.h" 725 #include "tree.h" 726 #include "expand.h" 727 #include "lex.h" 728 #include "proto.h" 729 730 /* be sure not to interfere with anyone else's idea about EXTERN */ 731 #ifdef EXTERN_DEFINED 732 # undef EXTERN_DEFINED 733 # undef EXTERN 734 #endif 735 #undef I__ 736