sh.h revision 1.25
1 /* $NetBSD: sh.h,v 1.25 2017/06/22 23:47:29 kamil Exp $ */ 2 3 /* 4 * Public Domain Bourne/Korn shell 5 */ 6 7 /* $Id: sh.h,v 1.25 2017/06/22 23:47:29 kamil 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 #include <stddef.h> 23 #include <stdlib.h> 24 #include <unistd.h> 25 #include <string.h> 26 27 #ifdef HAVE_PROTOTYPES 28 # include <stdarg.h> 29 # define SH_VA_START(va, argn) va_start(va, argn) 30 #else 31 # include <varargs.h> 32 # define SH_VA_START(va, argn) va_start(va) 33 #endif /* HAVE_PROTOTYPES */ 34 35 #include <errno.h> 36 #include <fcntl.h> 37 38 #ifndef O_ACCMODE 39 # define O_ACCMODE (O_RDONLY|O_WRONLY|O_RDWR) 40 #endif /* !O_ACCMODE */ 41 42 #ifndef F_OK /* access() arguments */ 43 # define F_OK 0 44 # define X_OK 1 45 # define W_OK 2 46 # define R_OK 4 47 #endif /* !F_OK */ 48 49 #ifndef SEEK_SET 50 # ifdef L_SET 51 # define SEEK_SET L_SET 52 # define SEEK_CUR L_INCR 53 # define SEEK_END L_XTND 54 # else /* L_SET */ 55 # define SEEK_SET 0 56 # define SEEK_CUR 1 57 # define SEEK_END 2 58 # endif /* L_SET */ 59 #endif /* !SEEK_SET */ 60 61 /* Some machines (eg, FreeBSD 1.1.5) define CLK_TCK in limits.h 62 * (ksh_limval.h assumes limits has been included, if available) 63 */ 64 #include <limits.h> 65 66 #include <signal.h> 67 #ifdef NSIG 68 # define SIGNALS NSIG 69 #else 70 # ifdef _MINIX 71 # define SIGNALS (_NSIG+1) /* _NSIG is # of signals used, excluding 0. */ 72 # else 73 # ifdef _SIGMAX /* QNX */ 74 # define SIGNALS _SIGMAX 75 # else /* _SIGMAX */ 76 # define SIGNALS 32 77 # endif /* _SIGMAX */ 78 # endif /* _MINIX */ 79 #endif /* NSIG */ 80 #ifndef SIGCHLD 81 # define SIGCHLD SIGCLD 82 #endif 83 /* struct sigaction.sa_flags is set to KSH_SA_FLAGS. Used to ensure 84 * system calls are interrupted 85 */ 86 #ifdef SA_INTERRUPT 87 # define KSH_SA_FLAGS SA_INTERRUPT 88 #else /* SA_INTERRUPT */ 89 # define KSH_SA_FLAGS 0 90 #endif /* SA_INTERRUPT */ 91 92 typedef RETSIGTYPE (*handler_t) ARGS((int)); /* signal handler */ 93 94 #ifdef USE_FAKE_SIGACT 95 # include "sigact.h" /* use sjg's fake sigaction() */ 96 #endif 97 98 #ifdef HAVE_PATHS_H 99 # include <paths.h> 100 #endif /* HAVE_PATHS_H */ 101 #ifdef _PATH_DEFPATH 102 # define DEFAULT__PATH _PATH_DEFPATH 103 #else /* _PATH_DEFPATH */ 104 # define DEFAULT__PATH DEFAULT_PATH 105 #endif /* _PATH_DEFPATH */ 106 107 #ifndef HAVE_KILLPG 108 # define killpg(p, s) kill(-(p), (s)) 109 #endif /* !HAVE_KILLPG */ 110 111 /* this is a hang-over from older versions of the os2 port */ 112 #define ksh_dupbase(fd, base) fcntl(fd, F_DUPFD, base) 113 114 #ifdef HAVE_SIGSETJMP 115 # define ksh_sigsetjmp(env,sm) sigsetjmp((env), (sm)) 116 # define ksh_siglongjmp(env,v) siglongjmp((env), (v)) 117 # define ksh_jmp_buf sigjmp_buf 118 #else /* HAVE_SIGSETJMP */ 119 # ifdef HAVE__SETJMP 120 # define ksh_sigsetjmp(env,sm) _setjmp(env) 121 # define ksh_siglongjmp(env,v) _longjmp((env), (v)) 122 # else /* HAVE__SETJMP */ 123 # define ksh_sigsetjmp(env,sm) setjmp(env) 124 # define ksh_siglongjmp(env,v) longjmp((env), (v)) 125 # endif /* HAVE__SETJMP */ 126 # define ksh_jmp_buf jmp_buf 127 #endif /* HAVE_SIGSETJMP */ 128 129 #ifndef HAVE_DUP2 130 extern int dup2 ARGS((int, int)); 131 #endif /* !HAVE_DUP2 */ 132 133 /* Find a integer type that is at least 32 bits (or die) - SIZEOF_* defined 134 * by autoconf (assumes an 8 bit byte, but I'm not concerned). 135 * NOTE: INT32 may end up being more than 32 bits. 136 */ 137 #if SIZEOF_INT >= 4 138 # define INT32 int 139 #else /* SIZEOF_INT */ 140 # if SIZEOF_LONG >= 4 141 # define INT32 long 142 # else /* SIZEOF_LONG */ 143 #error cannot find 32 bit type... 144 # endif /* SIZEOF_LONG */ 145 #endif /* SIZEOF_INT */ 146 147 /* end of common headers */ 148 149 /* Stop gcc and lint from complaining about possibly uninitialized variables */ 150 #if defined(__GNUC__) || defined(lint) 151 # define UNINITIALIZED(var) var = 0 152 #else 153 # define UNINITIALIZED(var) var 154 #endif /* GNUC || lint */ 155 156 /* some useful #defines */ 157 #ifdef EXTERN 158 # define I__(i) = i 159 #else 160 # define I__(i) 161 # define EXTERN extern 162 # define EXTERN_DEFINED 163 #endif 164 165 #ifndef EXECSHELL 166 /* shell to exec scripts (see also $SHELL initialization in main.c) */ 167 # define EXECSHELL "/bin/sh" 168 # define EXECSHELL_STR "EXECSHELL" 169 #endif 170 171 /* ISABSPATH() means path is fully and completely specified, 172 * ISROOTEDPATH() means a .. as the first component is a no-op, 173 * ISRELPATH() means $PWD can be tacked on to get an absolute path. 174 * 175 * OS Path ISABSPATH ISROOTEDPATH ISRELPATH 176 * unix /foo yes yes no 177 * unix foo no no yes 178 * unix ../foo no no yes 179 */ 180 # define PATHSEP ':' 181 # define DIRSEP '/' 182 # define DIRSEPSTR "/" 183 # define ISDIRSEP(c) ((c) == '/') 184 # define ISABSPATH(s) ISDIRSEP((s)[0]) 185 # define ISRELPATH(s) (!ISABSPATH(s)) 186 # define ISROOTEDPATH(s) ISABSPATH(s) 187 # define FILECHCONV(c) c 188 # define FILECMP(s1, s2) strcmp(s1, s2) 189 # define FILENCMP(s1, s2, n) strncmp(s1, s2, n) 190 # define ksh_strchr_dirsep(p) strchr(p, DIRSEP) 191 # define ksh_strrchr_dirsep(p) strrchr(p, DIRSEP) 192 193 typedef int bool_t; 194 #define FALSE 0 195 #define TRUE 1 196 197 #define NELEM(a) (sizeof(a) / sizeof((a)[0])) 198 #define sizeofN(type, n) (sizeof(type) * (n)) 199 #define BIT(i) (1<<(i)) /* define bit in flag */ 200 201 /* Table flag type - needs > 16 and < 32 bits */ 202 typedef INT32 Tflag; 203 204 #define NUFILE 32 /* Number of user-accessible files */ 205 #define FDBASE 10 /* First file usable by Shell */ 206 207 /* you're not going to run setuid shell scripts, are you? */ 208 #define eaccess(path, mode) access(path, mode) 209 210 /* Make MAGIC a char that might be printed to make bugs more obvious, but 211 * not a char that is used often. Also, can't use the high bit as it causes 212 * portability problems (calling strchr(x, 0x80|'x') is error prone). 213 */ 214 #define MAGIC (7) /* prefix for *?[!{,} during expand */ 215 #define ISMAGIC(c) ((unsigned char)(c) == MAGIC) 216 #define NOT '!' /* might use ^ (ie, [!...] vs [^..]) */ 217 218 #define LINE 1024 /* input line size */ 219 #define PATH 1024 /* pathname size (todo: PATH_MAX/pathconf()) */ 220 #define ARRAYMAX 1023 /* max array index */ 221 222 EXTERN const char *kshname; /* $0 */ 223 EXTERN pid_t kshpid; /* $$, shell pid */ 224 EXTERN pid_t procpid; /* pid of executing process */ 225 EXTERN uid_t ksheuid; /* effective uid of shell */ 226 EXTERN int exstat; /* exit status */ 227 EXTERN int subst_exstat; /* exit status of last $(..)/`..` */ 228 EXTERN const char *safe_prompt; /* safe prompt if PS1 substitution fails */ 229 230 /* 231 * Area-based allocation built on malloc/free 232 */ 233 typedef struct Area { 234 struct link *freelist; /* free list */ 235 } Area; 236 237 EXTERN Area aperm; /* permanent object space */ 238 #define APERM &aperm 239 #define ATEMP &e->area 240 241 #ifdef MEM_DEBUG 242 # include "chmem.h" /* a debugging front end for malloc et. al. */ 243 #endif /* MEM_DEBUG */ 244 245 #ifdef KSH_DEBUG 246 # define kshdebug_init() kshdebug_init_() 247 # define kshdebug_printf(a) kshdebug_printf_ a 248 # define kshdebug_dump(a) kshdebug_dump_ a 249 #else /* KSH_DEBUG */ 250 # define kshdebug_init() 251 # define kshdebug_printf(a) 252 # define kshdebug_dump(a) 253 #endif /* KSH_DEBUG */ 254 255 /* 256 * parsing & execution environment 257 */ 258 EXTERN struct env { 259 short type; /* environment type - see below */ 260 short flags; /* EF_* */ 261 Area area; /* temporary allocation area */ 262 struct block *loc; /* local variables and functions */ 263 short *savefd; /* original redirected fd's */ 264 struct env *oenv; /* link to previous environment */ 265 ksh_jmp_buf jbuf; /* long jump back to env creator */ 266 struct temp *temps; /* temp files */ 267 } *e; 268 269 /* struct env.type values */ 270 #define E_NONE 0 /* dummy environment */ 271 #define E_PARSE 1 /* parsing command # */ 272 #define E_FUNC 2 /* executing function # */ 273 #define E_INCL 3 /* including a file via . # */ 274 #define E_EXEC 4 /* executing command tree */ 275 #define E_LOOP 5 /* executing for/while # */ 276 #define E_ERRH 6 /* general error handler # */ 277 /* # indicates env has valid jbuf (see unwind()) */ 278 279 /* struct env.flag values */ 280 #define EF_FUNC_PARSE BIT(0) /* function being parsed */ 281 #define EF_BRKCONT_PASS BIT(1) /* set if E_LOOP must pass break/continue on */ 282 #define EF_FAKE_SIGDIE BIT(2) /* hack to get info from unwind to quitenv */ 283 284 /* Do breaks/continues stop at env type e? */ 285 #define STOP_BRKCONT(t) ((t) == E_NONE || (t) == E_PARSE \ 286 || (t) == E_FUNC || (t) == E_INCL) 287 /* Do returns stop at env type e? */ 288 #define STOP_RETURN(t) ((t) == E_FUNC || (t) == E_INCL) 289 290 /* values for ksh_siglongjmp(e->jbuf, 0) */ 291 #define LRETURN 1 /* return statement */ 292 #define LEXIT 2 /* exit statement */ 293 #define LERROR 3 /* errorf() called */ 294 #define LLEAVE 4 /* untrappable exit/error */ 295 #define LINTR 5 /* ^C noticed */ 296 #define LBREAK 6 /* break statement */ 297 #define LCONTIN 7 /* continue statement */ 298 #define LSHELL 8 /* return to interactive shell() */ 299 #define LAEXPR 9 /* error in arithmetic expression */ 300 301 /* option processing */ 302 #define OF_CMDLINE 0x01 /* command line */ 303 #define OF_SET 0x02 /* set builtin */ 304 #define OF_SPECIAL 0x04 /* a special variable changing */ 305 #define OF_INTERNAL 0x08 /* set internally by shell */ 306 #define OF_ANY (OF_CMDLINE | OF_SET | OF_SPECIAL | OF_INTERNAL) 307 308 struct option { 309 const char *name; /* long name of option */ 310 char c; /* character flag (if any) */ 311 short flags; /* OF_* */ 312 }; 313 extern const struct option goptions[]; 314 315 /* 316 * flags (the order of these enums MUST match the order in misc.c(options[])) 317 */ 318 enum sh_flag { 319 FEXPORT = 0, /* -a: export all */ 320 #ifdef BRACE_EXPAND 321 FBRACEEXPAND, /* enable {} globbing */ 322 #endif 323 FBGNICE, /* bgnice */ 324 FCOMMAND, /* -c: (invocation) execute specified command */ 325 #ifdef EMACS 326 FEMACS, /* emacs command editing */ 327 FEMACSUSEMETA, /* use 8th bit as meta */ 328 #endif 329 FERREXIT, /* -e: quit on error */ 330 #ifdef EMACS 331 FGMACS, /* gmacs command editing */ 332 #endif 333 FIGNOREEOF, /* eof does not exit */ 334 FTALKING, /* -i: interactive */ 335 FKEYWORD, /* -k: name=value anywhere */ 336 FLOGIN, /* -l: a login shell */ 337 FMARKDIRS, /* mark dirs with / in file name completion */ 338 FMONITOR, /* -m: job control monitoring */ 339 FNOCLOBBER, /* -C: don't overwrite existing files */ 340 FNOEXEC, /* -n: don't execute any commands */ 341 FNOGLOB, /* -f: don't do file globbing */ 342 FNOHUP, /* -H: don't kill running jobs when login shell exits */ 343 FNOLOG, /* don't save functions in history (ignored) */ 344 #ifdef JOBS 345 FNOTIFY, /* -b: asynchronous job completion notification */ 346 #endif 347 FNOUNSET, /* -u: using an unset var is an error */ 348 FPHYSICAL, /* -o physical: don't do logical cd's/pwd's */ 349 FPOSIX, /* -o posix: be posixly correct */ 350 FPRIVILEGED, /* -p: use suid_profile */ 351 FRESTRICTED, /* -r: restricted shell */ 352 FSTDIN, /* -s: (invocation) parse stdin */ 353 FTRACKALL, /* -h: create tracked aliases for all commands */ 354 FVERBOSE, /* -v: echo input */ 355 #ifdef VI 356 FVI, /* vi command editing */ 357 FVIRAW, /* always read in raw mode (ignored) */ 358 FVISHOW8, /* display chars with 8th bit set as is (versus M-) */ 359 FVITABCOMPLETE, /* enable tab as file name completion char */ 360 FVIESCCOMPLETE, /* enable ESC as file name completion in command mode */ 361 #endif 362 FXTRACE, /* -x: execution trace */ 363 FTALKING_I, /* (internal): initial shell was interactive */ 364 FNFLAGS /* (place holder: how many flags are there) */ 365 }; 366 367 #define Flag(f) (shell_flags[(int) (f)]) 368 369 EXTERN char shell_flags [FNFLAGS]; 370 371 EXTERN char null [] I__(""); /* null value for variable */ 372 EXTERN char space [] I__(" "); 373 EXTERN char newline [] I__("\n"); 374 EXTERN char slash [] I__("/"); 375 376 enum temp_type { 377 TT_HEREDOC_EXP, /* expanded heredoc */ 378 TT_HIST_EDIT /* temp file used for history editing (fc -e) */ 379 }; 380 typedef enum temp_type Temp_type; 381 /* temp/heredoc files. The file is removed when the struct is freed. */ 382 struct temp { 383 struct temp *next; 384 struct shf *shf; 385 int pid; /* pid of process parsed here-doc */ 386 Temp_type type; 387 char *name; 388 }; 389 390 /* 391 * stdio and our IO routines 392 */ 393 394 #define shl_spare (&shf_iob[0]) /* for c_read()/c_print() */ 395 #define shl_stdout (&shf_iob[1]) 396 #define shl_out (&shf_iob[2]) 397 EXTERN int shl_stdout_ok; 398 399 /* 400 * trap handlers 401 */ 402 typedef struct trap { 403 int signal; /* signal number */ 404 const char *name; /* short name */ 405 const char *mess; /* descriptive name */ 406 char *trap; /* trap command */ 407 int volatile set; /* trap pending */ 408 int flags; /* TF_* */ 409 handler_t cursig; /* current handler (valid if TF_ORIG_* set) */ 410 handler_t shtrap; /* shell signal handler */ 411 } Trap; 412 413 /* values for Trap.flags */ 414 #define TF_SHELL_USES BIT(0) /* shell uses signal, user can't change */ 415 #define TF_USER_SET BIT(1) /* user has (tried to) set trap */ 416 #define TF_ORIG_IGN BIT(2) /* original action was SIG_IGN */ 417 #define TF_ORIG_DFL BIT(3) /* original action was SIG_DFL */ 418 #define TF_EXEC_IGN BIT(4) /* restore SIG_IGN just before exec */ 419 #define TF_EXEC_DFL BIT(5) /* restore SIG_DFL just before exec */ 420 #define TF_DFL_INTR BIT(6) /* when received, default action is LINTR */ 421 #define TF_TTY_INTR BIT(7) /* tty generated signal (see j_waitj) */ 422 #define TF_CHANGED BIT(8) /* used by runtrap() to detect trap changes */ 423 #define TF_FATAL BIT(9) /* causes termination if not trapped */ 424 425 /* values for setsig()/setexecsig() flags argument */ 426 #define SS_RESTORE_MASK 0x3 /* how to restore a signal before an exec() */ 427 #define SS_RESTORE_CURR 0 /* leave current handler in place */ 428 #define SS_RESTORE_ORIG 1 /* restore original handler */ 429 #define SS_RESTORE_DFL 2 /* restore to SIG_DFL */ 430 #define SS_RESTORE_IGN 3 /* restore to SIG_IGN */ 431 #define SS_FORCE BIT(3) /* set signal even if original signal ignored */ 432 #define SS_USER BIT(4) /* user is doing the set (ie, trap command) */ 433 #define SS_SHTRAP BIT(5) /* trap for internal use (CHLD,ALRM,WINCH) */ 434 435 #define SIGEXIT_ 0 /* for trap EXIT */ 436 #define SIGERR_ SIGNALS /* for trap ERR */ 437 438 EXTERN int volatile trap; /* traps pending? */ 439 EXTERN int volatile intrsig; /* pending trap interrupts executing command */ 440 EXTERN int volatile fatal_trap;/* received a fatal signal */ 441 extern Trap sigtraps[SIGNALS+1]; 442 443 #ifdef KSH 444 /* 445 * TMOUT support 446 */ 447 /* values for ksh_tmout_state */ 448 enum tmout_enum { 449 TMOUT_EXECUTING = 0, /* executing commands */ 450 TMOUT_READING, /* waiting for input */ 451 TMOUT_LEAVING /* have timed out */ 452 }; 453 EXTERN unsigned int ksh_tmout; 454 EXTERN enum tmout_enum ksh_tmout_state I__(TMOUT_EXECUTING); 455 #endif /* KSH */ 456 457 /* For "You have stopped jobs" message */ 458 EXTERN int really_exit; 459 460 /* 461 * fast character classes 462 */ 463 #define C_ALPHA BIT(0) /* a-z_A-Z */ 464 #define C_DIGIT BIT(1) /* 0-9 */ 465 #define C_LEX1 BIT(2) /* \0 \t\n|&;<>() */ 466 #define C_VAR1 BIT(3) /* *@#!$-? */ 467 #define C_IFSWS BIT(4) /* \t \n (IFS white space) */ 468 #define C_SUBOP1 BIT(5) /* "=-+?" */ 469 #define C_SUBOP2 BIT(6) /* "#%" */ 470 #define C_IFS BIT(7) /* $IFS */ 471 #define C_QUOTE BIT(8) /* \n\t"#$&'()*;<>?[\`| (needing quoting) */ 472 473 extern short ctypes []; 474 475 #define ctype(c, t) !!(ctypes[(unsigned char)(c)]&(t)) 476 #define letter(c) ctype(c, C_ALPHA) 477 #define digit(c) ctype(c, C_DIGIT) 478 #define letnum(c) ctype(c, C_ALPHA|C_DIGIT) 479 480 EXTERN int ifs0 I__(' '); /* for "$*" */ 481 482 /* Argument parsing for built-in commands and getopts command */ 483 484 /* Values for Getopt.flags */ 485 #define GF_ERROR BIT(0) /* call errorf() if there is an error */ 486 #define GF_PLUSOPT BIT(1) /* allow +c as an option */ 487 #define GF_NONAME BIT(2) /* don't print argv[0] in errors */ 488 489 /* Values for Getopt.info */ 490 #define GI_MINUS BIT(0) /* an option started with -... */ 491 #define GI_PLUS BIT(1) /* an option started with +... */ 492 #define GI_MINUSMINUS BIT(2) /* arguments were ended with -- */ 493 494 typedef struct { 495 int optind; 496 int uoptind;/* what user sees in $OPTIND */ 497 char *optarg; 498 int flags; /* see GF_* */ 499 int info; /* see GI_* */ 500 unsigned int p; /* 0 or index into argv[optind - 1] */ 501 char buf[2]; /* for bad option OPTARG value */ 502 } Getopt; 503 504 EXTERN Getopt builtin_opt; /* for shell builtin commands */ 505 EXTERN Getopt user_opt; /* parsing state for getopts builtin command */ 506 507 #ifdef KSH 508 /* This for co-processes */ 509 510 typedef INT32 Coproc_id; /* something that won't (realisticly) wrap */ 511 struct coproc { 512 int read; /* pipe from co-process's stdout */ 513 int readw; /* other side of read (saved temporarily) */ 514 int write; /* pipe to co-process's stdin */ 515 Coproc_id id; /* id of current output pipe */ 516 int njobs; /* number of live jobs using output pipe */ 517 void *job; /* 0 or job of co-process using input pipe */ 518 }; 519 EXTERN struct coproc coproc; 520 #endif /* KSH */ 521 522 /* Used in jobs.c and by coprocess stuff in exec.c */ 523 #ifdef JOB_SIGS 524 EXTERN sigset_t sm_default, sm_sigchld; 525 #endif /* JOB_SIGS */ 526 527 extern char ksh_version[]; 528 529 /* name of called builtin function (used by error functions) */ 530 EXTERN char *builtin_argv0; 531 EXTERN Tflag builtin_flag; /* flags of called builtin (SPEC_BI, etc.) */ 532 533 /* current working directory, and size of memory allocated for same */ 534 EXTERN char *current_wd; 535 EXTERN int current_wd_size; 536 537 #ifdef EDIT 538 /* Minimum required space to work with on a line - if the prompt leaves less 539 * space than this on a line, the prompt is truncated. 540 */ 541 # define MIN_EDIT_SPACE 7 542 /* Minimum allowed value for x_cols: 2 for prompt, 3 for " < " at end of line 543 */ 544 # define MIN_COLS (2 + MIN_EDIT_SPACE + 3) 545 EXTERN int x_cols I__(80); /* tty columns */ 546 #else 547 # define x_cols 80 /* for pr_menu(exec.c) */ 548 #endif 549 550 /* These to avoid bracket matching problems */ 551 #define OPAREN '(' 552 #define CPAREN ')' 553 #define OBRACK '[' 554 #define CBRACK ']' 555 #define OBRACE '{' 556 #define CBRACE '}' 557 558 /* Determine the location of the system (common) profile */ 559 #ifndef KSH_SYSTEM_PROFILE 560 # ifdef __NeXT 561 # define KSH_SYSTEM_PROFILE "/etc/profile.std" 562 # else /* __NeXT */ 563 # define KSH_SYSTEM_PROFILE "/etc/profile" 564 # endif /* __NeXT */ 565 #endif /* KSH_SYSTEM_PROFILE */ 566 567 /* Used by v_evaluate() and setstr() to control action when error occurs */ 568 #define KSH_UNWIND_ERROR 0 /* unwind the stack (longjmp) */ 569 #define KSH_RETURN_ERROR 1 /* return 1/0 for success/failure */ 570 571 #include "shf.h" 572 #include "table.h" 573 #include "tree.h" 574 #include "expand.h" 575 #include "lex.h" 576 #include "proto.h" 577 578 /* be sure not to interfere with anyone else's idea about EXTERN */ 579 #ifdef EXTERN_DEFINED 580 # undef EXTERN_DEFINED 581 # undef EXTERN 582 #endif 583 #undef I__ 584
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