1 /* $OpenBSD: sh.h,v 1.35 2015/09/10 22:48:58 nicm Exp $ */ 2 /* $OpenBSD: shf.h,v 1.6 2005/12/11 18:53:51 deraadt Exp $ */ 3 /* $OpenBSD: table.h,v 1.8 2012/02/19 07:52:30 otto Exp $ */ 4 /* $OpenBSD: tree.h,v 1.10 2005/03/28 21:28:22 deraadt Exp $ */ 5 /* $OpenBSD: expand.h,v 1.7 2015/09/01 13:12:31 tedu Exp $ */ 6 /* $OpenBSD: lex.h,v 1.13 2013/03/03 19:11:34 guenther Exp $ */ 7 /* $OpenBSD: proto.h,v 1.35 2013/09/04 15:49:19 millert Exp $ */ 8 /* $OpenBSD: c_test.h,v 1.4 2004/12/20 11:34:26 otto Exp $ */ 9 /* $OpenBSD: tty.h,v 1.5 2004/12/20 11:34:26 otto Exp $ */ 10 11 /*- 12 * Copyright 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 13 * 2011, 2012, 2013, 2014, 2015, 2016 14 * mirabilos <m (at) mirbsd.org> 15 * 16 * Provided that these terms and disclaimer and all copyright notices 17 * are retained or reproduced in an accompanying document, permission 18 * is granted to deal in this work without restriction, including un 19 * limited rights to use, publicly perform, distribute, sell, modify, 20 * merge, give away, or sublicence. 21 * 22 * This work is provided AS IS and WITHOUT WARRANTY of any kind, to 23 * the utmost extent permitted by applicable law, neither express nor 24 * implied; without malicious intent or gross negligence. In no event 25 * may a licensor, author or contributor be held liable for indirect, 26 * direct, other damage, loss, or other issues arising in any way out 27 * of dealing in the work, even if advised of the possibility of such 28 * damage or existence of a defect, except proven that it results out 29 * of said persons immediate fault when using the work as intended. 30 */ 31 32 #ifdef __dietlibc__ 33 /* XXX imake style */ 34 #define _BSD_SOURCE /* live, BSD, live */ 35 #endif 36 37 #if HAVE_SYS_PARAM_H 38 #include <sys/param.h> 39 #endif 40 #include <sys/types.h> 41 #if HAVE_BOTH_TIME_H 42 #include <sys/time.h> 43 #include <time.h> 44 #elif HAVE_SYS_TIME_H 45 #include <sys/time.h> 46 #elif HAVE_TIME_H 47 #include <time.h> 48 #endif 49 #include <sys/ioctl.h> 50 #if HAVE_SYS_SYSMACROS_H 51 #include <sys/sysmacros.h> 52 #endif 53 #if HAVE_SYS_MKDEV_H 54 #include <sys/mkdev.h> 55 #endif 56 #if HAVE_SYS_MMAN_H 57 #include <sys/mman.h> 58 #endif 59 #if HAVE_SYS_RESOURCE_H 60 #include <sys/resource.h> 61 #endif 62 #include <sys/stat.h> 63 #include <sys/wait.h> 64 #include <dirent.h> 65 #include <errno.h> 66 #include <fcntl.h> 67 #if HAVE_IO_H 68 #include <io.h> 69 #endif 70 #if HAVE_LIBGEN_H 71 #include <libgen.h> 72 #endif 73 #if HAVE_LIBUTIL_H 74 #include <libutil.h> 75 #endif 76 #include <limits.h> 77 #if HAVE_PATHS_H 78 #include <paths.h> 79 #endif 80 #include <pwd.h> 81 #include <setjmp.h> 82 #include <signal.h> 83 #include <stdarg.h> 84 #include <stddef.h> 85 #if HAVE_STDINT_H 86 #include <stdint.h> 87 #endif 88 #include <stdio.h> 89 #include <stdlib.h> 90 #include <string.h> 91 #if HAVE_STRINGS_H 92 #include <strings.h> 93 #endif 94 #if HAVE_TERMIOS_H 95 #include <termios.h> 96 #else 97 /* shudder */ 98 #include <termio.h> 99 #endif 100 #ifdef _ISC_UNIX 101 /* XXX imake style */ 102 #include <sys/sioctl.h> 103 #endif 104 #if HAVE_ULIMIT_H 105 #include <ulimit.h> 106 #endif 107 #include <unistd.h> 108 #if HAVE_VALUES_H 109 #include <values.h> 110 #endif 111 #ifdef MIRBSD_BOOTFLOPPY 112 #include <wchar.h> 113 #endif 114 115 #undef __attribute__ 116 #if HAVE_ATTRIBUTE_BOUNDED 117 #define MKSH_A_BOUNDED(x,y,z) __attribute__((__bounded__(x, y, z))) 118 #else 119 #define MKSH_A_BOUNDED(x,y,z) /* nothing */ 120 #endif 121 #if HAVE_ATTRIBUTE_FORMAT 122 #define MKSH_A_FORMAT(x,y,z) __attribute__((__format__(x, y, z))) 123 #else 124 #define MKSH_A_FORMAT(x,y,z) /* nothing */ 125 #endif 126 #if HAVE_ATTRIBUTE_NORETURN 127 #define MKSH_A_NORETURN __attribute__((__noreturn__)) 128 #else 129 #define MKSH_A_NORETURN /* nothing */ 130 #endif 131 #if HAVE_ATTRIBUTE_PURE 132 #define MKSH_A_PURE __attribute__((__pure__)) 133 #else 134 #define MKSH_A_PURE /* nothing */ 135 #endif 136 #if HAVE_ATTRIBUTE_UNUSED 137 #define MKSH_A_UNUSED __attribute__((__unused__)) 138 #else 139 #define MKSH_A_UNUSED /* nothing */ 140 #endif 141 #if HAVE_ATTRIBUTE_USED 142 #define MKSH_A_USED __attribute__((__used__)) 143 #else 144 #define MKSH_A_USED /* nothing */ 145 #endif 146 147 #if defined(MirBSD) && (MirBSD >= 0x09A1) && \ 148 defined(__ELF__) && defined(__GNUC__) && \ 149 !defined(__llvm__) && !defined(__NWCC__) 150 /* 151 * We got usable __IDSTRING __COPYRIGHT __RCSID __SCCSID macros 152 * which work for all cases; no need to redefine them using the 153 * "portable" macros from below when we might have the "better" 154 * gcc+ELF specific macros or other system dependent ones. 155 */ 156 #else 157 #undef __IDSTRING 158 #undef __IDSTRING_CONCAT 159 #undef __IDSTRING_EXPAND 160 #undef __COPYRIGHT 161 #undef __RCSID 162 #undef __SCCSID 163 #define __IDSTRING_CONCAT(l,p) __LINTED__ ## l ## _ ## p 164 #define __IDSTRING_EXPAND(l,p) __IDSTRING_CONCAT(l,p) 165 #ifdef MKSH_DONT_EMIT_IDSTRING 166 #define __IDSTRING(prefix, string) /* nothing */ 167 #else 168 #define __IDSTRING(prefix, string) \ 169 static const char __IDSTRING_EXPAND(__LINE__,prefix) [] \ 170 MKSH_A_USED = "@(""#)" #prefix ": " string 171 #endif 172 #define __COPYRIGHT(x) __IDSTRING(copyright,x) 173 #define __RCSID(x) __IDSTRING(rcsid,x) 174 #define __SCCSID(x) __IDSTRING(sccsid,x) 175 #endif 176 177 #ifdef EXTERN 178 __RCSID("$MirOS: src/bin/mksh/sh.h,v 1.757 2016/01/20 21:34:13 tg Exp $"); 179 #endif 180 #define MKSH_VERSION "R52 2016/01/20" 181 182 /* arithmetic types: C implementation */ 183 #if !HAVE_CAN_INTTYPES 184 #if !HAVE_CAN_UCBINTS 185 typedef signed int int32_t; 186 typedef unsigned int uint32_t; 187 #else 188 typedef u_int32_t uint32_t; 189 #endif 190 #endif 191 192 /* arithmetic types: shell arithmetics */ 193 #ifdef MKSH_LEGACY_MODE 194 /* 195 * POSIX demands these to be the C environment's long type 196 */ 197 typedef long mksh_ari_t; 198 typedef unsigned long mksh_uari_t; 199 #else 200 /* 201 * These types are exactly 32 bit wide; signed and unsigned 202 * integer wraparound, even across division and modulo, for 203 * any shell code using them, is guaranteed. 204 */ 205 typedef int32_t mksh_ari_t; 206 typedef uint32_t mksh_uari_t; 207 #endif 208 209 /* boolean type (no <stdbool.h> deliberately) */ 210 typedef unsigned char mksh_bool; 211 #undef bool 212 /* false MUST equal the same 0 as written by static storage initialisation */ 213 #undef false 214 #undef true 215 /* access macros for boolean type */ 216 #define bool mksh_bool 217 /* values must have identity mapping between mksh_bool and short */ 218 #define false 0 219 #define true 1 220 /* make any-type into bool or short */ 221 #define tobool(cond) ((cond) ? true : false) 222 223 /* char (octet) type: C implementation */ 224 #if !HAVE_CAN_INT8TYPE 225 #if !HAVE_CAN_UCBINT8 226 typedef unsigned char uint8_t; 227 #else 228 typedef u_int8_t uint8_t; 229 #endif 230 #endif 231 232 /* other standard types */ 233 234 #if !HAVE_RLIM_T 235 typedef unsigned long rlim_t; 236 #endif 237 238 #if !HAVE_SIG_T 239 #undef sig_t 240 typedef void (*sig_t)(int); 241 #endif 242 243 #ifdef MKSH_TYPEDEF_SIG_ATOMIC_T 244 typedef MKSH_TYPEDEF_SIG_ATOMIC_T sig_atomic_t; 245 #endif 246 247 #ifdef MKSH_TYPEDEF_SSIZE_T 248 typedef MKSH_TYPEDEF_SSIZE_T ssize_t; 249 #endif 250 251 /* un-do vendor damage */ 252 253 #undef BAD /* AIX defines that somewhere */ 254 #undef PRINT /* LynxOS defines that somewhere */ 255 #undef flock /* SCO UnixWare defines that to flock64 but ENOENT */ 256 257 258 #ifndef MKSH_INCLUDES_ONLY 259 260 /* extra types */ 261 262 /* getrusage does not exist on OS/2 kLIBC */ 263 #if !HAVE_GETRUSAGE && !defined(__OS2__) 264 #undef rusage 265 #undef RUSAGE_SELF 266 #undef RUSAGE_CHILDREN 267 #define rusage mksh_rusage 268 #define RUSAGE_SELF 0 269 #define RUSAGE_CHILDREN -1 270 271 struct rusage { 272 struct timeval ru_utime; 273 struct timeval ru_stime; 274 }; 275 #endif 276 277 /* extra macros */ 278 279 #ifndef timerclear 280 #define timerclear(tvp) \ 281 do { \ 282 (tvp)->tv_sec = (tvp)->tv_usec = 0; \ 283 } while (/* CONSTCOND */ 0) 284 #endif 285 #ifndef timeradd 286 #define timeradd(tvp, uvp, vvp) \ 287 do { \ 288 (vvp)->tv_sec = (tvp)->tv_sec + (uvp)->tv_sec; \ 289 (vvp)->tv_usec = (tvp)->tv_usec + (uvp)->tv_usec; \ 290 if ((vvp)->tv_usec >= 1000000) { \ 291 (vvp)->tv_sec++; \ 292 (vvp)->tv_usec -= 1000000; \ 293 } \ 294 } while (/* CONSTCOND */ 0) 295 #endif 296 #ifndef timersub 297 #define timersub(tvp, uvp, vvp) \ 298 do { \ 299 (vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec; \ 300 (vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec; \ 301 if ((vvp)->tv_usec < 0) { \ 302 (vvp)->tv_sec--; \ 303 (vvp)->tv_usec += 1000000; \ 304 } \ 305 } while (/* CONSTCOND */ 0) 306 #endif 307 308 #ifdef MKSH__NO_PATH_MAX 309 #undef PATH_MAX 310 #else 311 #ifndef PATH_MAX 312 #ifdef MAXPATHLEN 313 #define PATH_MAX MAXPATHLEN 314 #else 315 #define PATH_MAX 1024 316 #endif 317 #endif 318 #endif 319 #ifndef SIZE_MAX 320 #ifdef SIZE_T_MAX 321 #define SIZE_MAX SIZE_T_MAX 322 #else 323 #define SIZE_MAX ((size_t)-1) 324 #endif 325 #endif 326 #ifndef S_ISLNK 327 #define S_ISLNK(m) ((m & 0170000) == 0120000) 328 #endif 329 #ifndef S_ISSOCK 330 #define S_ISSOCK(m) ((m & 0170000) == 0140000) 331 #endif 332 #if !defined(S_ISCDF) && defined(S_CDF) 333 #define S_ISCDF(m) (S_ISDIR(m) && ((m) & S_CDF)) 334 #endif 335 #ifndef DEFFILEMODE 336 #define DEFFILEMODE (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH) 337 #endif 338 339 340 /* determine ksh_NSIG: first, use the traditional definitions */ 341 #undef ksh_NSIG 342 #if defined(NSIG) 343 #define ksh_NSIG (NSIG) 344 #elif defined(_NSIG) 345 #define ksh_NSIG (_NSIG) 346 #elif defined(SIGMAX) 347 #define ksh_NSIG (SIGMAX + 1) 348 #elif defined(_SIGMAX) 349 #define ksh_NSIG (_SIGMAX + 1) 350 #elif defined(NSIG_MAX) 351 #define ksh_NSIG (NSIG_MAX) 352 #else 353 # error Please have your platform define NSIG. 354 #endif 355 /* range-check them */ 356 #if (ksh_NSIG < 1) 357 # error Your NSIG value is not positive. 358 #undef ksh_NSIG 359 #endif 360 /* second, see if the new POSIX definition is available */ 361 #ifdef NSIG_MAX 362 #if (NSIG_MAX < 2) 363 /* and usable */ 364 # error Your NSIG_MAX value is too small. 365 #undef NSIG_MAX 366 #elif (ksh_NSIG > NSIG_MAX) 367 /* and realistic */ 368 # error Your NSIG value is larger than your NSIG_MAX value. 369 #undef NSIG_MAX 370 #else 371 /* since its usable, prefer it */ 372 #undef ksh_NSIG 373 #define ksh_NSIG (NSIG_MAX) 374 #endif 375 /* if NSIG_MAX is now still defined, use sysconf(_SC_NSIG) at runtime */ 376 #endif 377 /* third, for cpp without the error directive, default */ 378 #ifndef ksh_NSIG 379 #define ksh_NSIG 64 380 #endif 381 382 #define ksh_sigmask(sig) (((sig) < 1 || (sig) > 127) ? 255 : 128 + (sig)) 383 384 385 /* OS-dependent additions (functions, variables, by OS) */ 386 387 #ifdef MKSH_EXE_EXT 388 #undef MKSH_EXE_EXT 389 #define MKSH_EXE_EXT ".exe" 390 #else 391 #define MKSH_EXE_EXT "" 392 #endif 393 394 #ifdef __OS2__ 395 #define MKSH_PATHSEPS ";" 396 #define MKSH_PATHSEPC ';' 397 #define MKSH_UNIXROOT "/@unixroot" 398 #else 399 #define MKSH_PATHSEPS ":" 400 #define MKSH_PATHSEPC ':' 401 #define MKSH_UNIXROOT "" 402 #endif 403 404 #if !HAVE_FLOCK_DECL 405 extern int flock(int, int); 406 #endif 407 408 #if !HAVE_GETTIMEOFDAY 409 #define mksh_TIME(tv) do { \ 410 (tv).tv_usec = 0; \ 411 (tv).tv_sec = time(NULL); \ 412 } while (/* CONSTCOND */ 0) 413 #else 414 #define mksh_TIME(tv) gettimeofday(&(tv), NULL) 415 #endif 416 417 #if !HAVE_GETRUSAGE 418 extern int getrusage(int, struct rusage *); 419 #endif 420 421 #if !HAVE_MEMMOVE 422 /* we assume either memmove or bcopy exist, at the moment */ 423 #define memmove(dst, src, len) bcopy((src), (dst), (len)) 424 #endif 425 426 #if !HAVE_REVOKE_DECL 427 extern int revoke(const char *); 428 #endif 429 430 #if defined(DEBUG) || !HAVE_STRERROR 431 #undef strerror 432 #define strerror /* poisoned */ dontuse_strerror 433 #define cstrerror /* replaced */ cstrerror 434 extern const char *cstrerror(int); 435 #else 436 #define cstrerror(errnum) ((const char *)strerror(errnum)) 437 #endif 438 439 #if !HAVE_STRLCPY 440 size_t strlcpy(char *, const char *, size_t); 441 #endif 442 443 #ifdef __INTERIX 444 /* XXX imake style */ 445 #define makedev mkdev 446 extern int __cdecl seteuid(uid_t); 447 extern int __cdecl setegid(gid_t); 448 #endif 449 450 #if defined(__COHERENT__) 451 #ifndef O_ACCMODE 452 /* this need not work everywhere, take care */ 453 #define O_ACCMODE (O_RDONLY | O_WRONLY | O_RDWR) 454 #endif 455 #endif 456 457 #ifndef O_BINARY 458 #define O_BINARY 0 459 #endif 460 461 #ifdef MKSH__NO_SYMLINK 462 #undef S_ISLNK 463 #define S_ISLNK(m) (/* CONSTCOND */ 0) 464 #define mksh_lstat stat 465 #else 466 #define mksh_lstat lstat 467 #endif 468 469 #if HAVE_TERMIOS_H 470 #define mksh_ttyst struct termios 471 #define mksh_tcget(fd,st) tcgetattr((fd), (st)) 472 #define mksh_tcset(fd,st) tcsetattr((fd), TCSADRAIN, (st)) 473 #else 474 #define mksh_ttyst struct termio 475 #define mksh_tcget(fd,st) ioctl((fd), TCGETA, (st)) 476 #define mksh_tcset(fd,st) ioctl((fd), TCSETAW, (st)) 477 #endif 478 479 #ifndef ISTRIP 480 #define ISTRIP 0 481 #endif 482 483 484 /* some useful #defines */ 485 #ifdef EXTERN 486 # define E_INIT(i) = i 487 #else 488 # define E_INIT(i) 489 # define EXTERN extern 490 # define EXTERN_DEFINED 491 #endif 492 493 /* define bit in flag */ 494 #define BIT(i) (1 << (i)) 495 #define NELEM(a) (sizeof(a) / sizeof((a)[0])) 496 497 /* 498 * Make MAGIC a char that might be printed to make bugs more obvious, but 499 * not a char that is used often. Also, can't use the high bit as it causes 500 * portability problems (calling strchr(x, 0x80 | 'x') is error prone). 501 */ 502 #define MAGIC (7) /* prefix for *?[!{,} during expand */ 503 #define ISMAGIC(c) ((unsigned char)(c) == MAGIC) 504 505 EXTERN const char *safe_prompt; /* safe prompt if PS1 substitution fails */ 506 507 #ifdef MKSH_LEGACY_MODE 508 #define KSH_VERSIONNAME "LEGACY" 509 #else 510 #define KSH_VERSIONNAME "MIRBSD" 511 #endif 512 EXTERN const char initvsn[] E_INIT("KSH_VERSION=@(#)" KSH_VERSIONNAME \ 513 " KSH " MKSH_VERSION); 514 #define KSH_VERSION (initvsn + /* "KSH_VERSION=@(#)" */ 16) 515 516 EXTERN const char digits_uc[] E_INIT("0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"); 517 EXTERN const char digits_lc[] E_INIT("0123456789abcdefghijklmnopqrstuvwxyz"); 518 #define letters_uc (digits_uc + 10) 519 #define letters_lc (digits_lc + 10) 520 521 /* 522 * Evil hack for const correctness due to API brokenness 523 */ 524 union mksh_cchack { 525 char *rw; 526 const char *ro; 527 }; 528 union mksh_ccphack { 529 char **rw; 530 const char **ro; 531 }; 532 533 /* 534 * Evil hack since casting uint to sint is implementation-defined 535 */ 536 typedef union { 537 mksh_ari_t i; 538 mksh_uari_t u; 539 } mksh_ari_u; 540 541 /* for const debugging */ 542 #if defined(DEBUG) && defined(__GNUC__) && !defined(__ICC) && \ 543 !defined(__INTEL_COMPILER) && !defined(__SUNPRO_C) 544 char *ucstrchr(char *, int); 545 char *ucstrstr(char *, const char *); 546 #undef strchr 547 #define strchr ucstrchr 548 #define strstr ucstrstr 549 #define cstrchr(s,c) ({ \ 550 union mksh_cchack in, out; \ 551 \ 552 in.ro = (s); \ 553 out.rw = ucstrchr(in.rw, (c)); \ 554 (out.ro); \ 555 }) 556 #define cstrstr(b,l) ({ \ 557 union mksh_cchack in, out; \ 558 \ 559 in.ro = (b); \ 560 out.rw = ucstrstr(in.rw, (l)); \ 561 (out.ro); \ 562 }) 563 #define vstrchr(s,c) (cstrchr((s), (c)) != NULL) 564 #define vstrstr(b,l) (cstrstr((b), (l)) != NULL) 565 #else /* !DEBUG, !gcc */ 566 #define cstrchr(s,c) ((const char *)strchr((s), (c))) 567 #define cstrstr(s,c) ((const char *)strstr((s), (c))) 568 #define vstrchr(s,c) (strchr((s), (c)) != NULL) 569 #define vstrstr(b,l) (strstr((b), (l)) != NULL) 570 #endif 571 572 #if defined(DEBUG) || defined(__COVERITY__) 573 #define mkssert(e) do { if (!(e)) exit(255); } while (/* CONSTCOND */ 0) 574 #ifndef DEBUG_LEAKS 575 #define DEBUG_LEAKS 576 #endif 577 #else 578 #define mkssert(e) do { } while (/* CONSTCOND */ 0) 579 #endif 580 581 #if (!defined(MKSH_BUILDMAKEFILE4BSD) && !defined(MKSH_BUILDSH)) || (MKSH_BUILD_R != 521) 582 #error Must run Build.sh to compile this. 583 extern void thiswillneverbedefinedIhope(void); 584 int 585 im_sorry_dave(void) 586 { 587 /* Im sorry, Dave. Im afraid I cant do that. */ 588 return (thiswillneverbedefinedIhope()); 589 } 590 #endif 591 592 /* use this ipv strchr(s, 0) but no side effects in s! */ 593 #define strnul(s) ((s) + strlen(s)) 594 595 #define utf_ptradjx(src, dst) do { \ 596 (dst) = (src) + utf_ptradj(src); \ 597 } while (/* CONSTCOND */ 0) 598 599 #if defined(MKSH_SMALL) && !defined(MKSH_SMALL_BUT_FAST) 600 #define strdupx(d, s, ap) do { \ 601 (d) = strdup_i((s), (ap)); \ 602 } while (/* CONSTCOND */ 0) 603 #define strndupx(d, s, n, ap) do { \ 604 (d) = strndup_i((s), (n), (ap)); \ 605 } while (/* CONSTCOND */ 0) 606 #else 607 /* be careful to evaluate arguments only once! */ 608 #define strdupx(d, s, ap) do { \ 609 const char *strdup_src = (s); \ 610 char *strdup_dst = NULL; \ 611 \ 612 if (strdup_src != NULL) { \ 613 size_t strdup_len = strlen(strdup_src) + 1; \ 614 strdup_dst = alloc(strdup_len, (ap)); \ 615 memcpy(strdup_dst, strdup_src, strdup_len); \ 616 } \ 617 (d) = strdup_dst; \ 618 } while (/* CONSTCOND */ 0) 619 #define strndupx(d, s, n, ap) do { \ 620 const char *strdup_src = (s); \ 621 char *strdup_dst = NULL; \ 622 \ 623 if (strdup_src != NULL) { \ 624 size_t strndup_len = (n); \ 625 strdup_dst = alloc(strndup_len + 1, (ap)); \ 626 memcpy(strdup_dst, strdup_src, strndup_len); \ 627 strdup_dst[strndup_len] = '\0'; \ 628 } \ 629 (d) = strdup_dst; \ 630 } while (/* CONSTCOND */ 0) 631 #endif 632 633 #ifdef MKSH_LEGACY_MODE 634 #ifndef MKSH_NO_CMDLINE_EDITING 635 #define MKSH_NO_CMDLINE_EDITING /* defined */ 636 #endif 637 #ifndef MKSH_CONSERVATIVE_FDS 638 #define MKSH_CONSERVATIVE_FDS /* defined */ 639 #endif 640 #undef MKSH_S_NOVI 641 #define MKSH_S_NOVI 1 642 #endif 643 644 #ifdef MKSH_SMALL 645 #ifndef MKSH_CONSERVATIVE_FDS 646 #define MKSH_CONSERVATIVE_FDS /* defined */ 647 #endif 648 #ifndef MKSH_NOPWNAM 649 #define MKSH_NOPWNAM /* defined */ 650 #endif 651 #ifndef MKSH_S_NOVI 652 #define MKSH_S_NOVI 1 653 #endif 654 #endif 655 656 #ifndef MKSH_S_NOVI 657 #define MKSH_S_NOVI 0 658 #endif 659 660 #if defined(MKSH_NOPROSPECTOFWORK) && !defined(MKSH_UNEMPLOYED) 661 #define MKSH_UNEMPLOYED 1 662 #endif 663 664 /* these shall be smaller than 100 */ 665 #ifdef MKSH_CONSERVATIVE_FDS 666 #define NUFILE 32 /* Number of user-accessible files */ 667 #define FDBASE 10 /* First file usable by Shell */ 668 #else 669 #define NUFILE 56 /* Number of user-accessible files */ 670 #define FDBASE 24 /* First file usable by Shell */ 671 #endif 672 673 /* 674 * simple grouping allocator 675 */ 676 677 678 /* 0. OS API: where to get memory from and how to free it (grouped) */ 679 680 /* malloc(3)/realloc(3) -> free(3) for use by the memory allocator */ 681 #define malloc_osi(sz) malloc(sz) 682 #define realloc_osi(p,sz) realloc((p), (sz)) 683 #define free_osimalloc(p) free(p) 684 685 /* malloc(3)/realloc(3) -> free(3) for use by mksh code */ 686 #define malloc_osfunc(sz) malloc(sz) 687 #define realloc_osfunc(p,sz) realloc((p), (sz)) 688 #define free_osfunc(p) free(p) 689 690 #if HAVE_MKNOD 691 /* setmode(3) -> free(3) */ 692 #define free_ossetmode(p) free(p) 693 #endif 694 695 #ifdef MKSH__NO_PATH_MAX 696 /* GNU libc: get_current_dir_name(3) -> free(3) */ 697 #define free_gnu_gcdn(p) free(p) 698 #endif 699 700 701 /* 1. internal structure */ 702 struct lalloc { 703 struct lalloc *next; 704 }; 705 706 /* 2. sizes */ 707 #define ALLOC_ITEM struct lalloc 708 #define ALLOC_SIZE (sizeof(ALLOC_ITEM)) 709 710 /* 3. group structure (only the same for lalloc.c) */ 711 typedef struct lalloc Area; 712 713 714 EXTERN Area aperm; /* permanent object space */ 715 #define APERM &aperm 716 #define ATEMP &e->area 717 718 /* 719 * flags (the order of these enums MUST match the order in misc.c(options[])) 720 */ 721 enum sh_flag { 722 #define SHFLAGS_ENUMS 723 #include "sh_flags.gen" 724 FNFLAGS /* (place holder: how many flags are there) */ 725 }; 726 727 #define Flag(f) (shell_flags[(int)(f)]) 728 #define UTFMODE Flag(FUNICODE) 729 730 /* 731 * parsing & execution environment 732 * 733 * note that kshlongjmp MUST NOT be passed 0 as second argument! 734 */ 735 #ifdef MKSH_NO_SIGSETJMP 736 #define kshjmp_buf jmp_buf 737 #define kshsetjmp(jbuf) _setjmp(jbuf) 738 #define kshlongjmp _longjmp 739 #else 740 #define kshjmp_buf sigjmp_buf 741 #define kshsetjmp(jbuf) sigsetjmp((jbuf), 0) 742 #define kshlongjmp siglongjmp 743 #endif 744 745 struct sretrace_info; 746 struct yyrecursive_state; 747 748 EXTERN struct sretrace_info *retrace_info E_INIT(NULL); 749 EXTERN int subshell_nesting_type E_INIT(0); 750 751 extern struct env { 752 ALLOC_ITEM alloc_INT; /* internal, do not touch */ 753 Area area; /* temporary allocation area */ 754 struct env *oenv; /* link to previous environment */ 755 struct block *loc; /* local variables and functions */ 756 short *savefd; /* original redirected fds */ 757 struct temp *temps; /* temp files */ 758 /* saved parser recursion state */ 759 struct yyrecursive_state *yyrecursive_statep; 760 kshjmp_buf jbuf; /* long jump back to env creator */ 761 uint8_t type; /* environment type - see below */ 762 uint8_t flags; /* EF_* */ 763 } *e; 764 765 /* struct env.type values */ 766 #define E_NONE 0 /* dummy environment */ 767 #define E_PARSE 1 /* parsing command # */ 768 #define E_FUNC 2 /* executing function # */ 769 #define E_INCL 3 /* including a file via . # */ 770 #define E_EXEC 4 /* executing command tree */ 771 #define E_LOOP 5 /* executing for/while # */ 772 #define E_ERRH 6 /* general error handler # */ 773 #define E_GONE 7 /* hidden in child */ 774 /* # indicates env has valid jbuf (see unwind()) */ 775 776 /* struct env.flag values */ 777 #define EF_BRKCONT_PASS BIT(1) /* set if E_LOOP must pass break/continue on */ 778 #define EF_FAKE_SIGDIE BIT(2) /* hack to get info from unwind to quitenv */ 779 780 /* Do breaks/continues stop at env type e? */ 781 #define STOP_BRKCONT(t) ((t) == E_NONE || (t) == E_PARSE || \ 782 (t) == E_FUNC || (t) == E_INCL) 783 /* Do returns stop at env type e? */ 784 #define STOP_RETURN(t) ((t) == E_FUNC || (t) == E_INCL) 785 786 /* values for kshlongjmp(e->jbuf, i) */ 787 /* note that i MUST NOT be zero */ 788 #define LRETURN 1 /* return statement */ 789 #define LEXIT 2 /* exit statement */ 790 #define LERROR 3 /* errorf() called */ 791 #define LLEAVE 4 /* untrappable exit/error */ 792 #define LINTR 5 /* ^C noticed */ 793 #define LBREAK 6 /* break statement */ 794 #define LCONTIN 7 /* continue statement */ 795 #define LSHELL 8 /* return to interactive shell() */ 796 #define LAEXPR 9 /* error in arithmetic expression */ 797 798 /* sort of shell global state */ 799 EXTERN pid_t procpid; /* PID of executing process */ 800 EXTERN int exstat; /* exit status */ 801 EXTERN int subst_exstat; /* exit status of last $(..)/`..` */ 802 EXTERN struct tbl *vp_pipest; /* global PIPESTATUS array */ 803 EXTERN short trap_exstat; /* exit status before running a trap */ 804 EXTERN uint8_t trap_nested; /* running nested traps */ 805 EXTERN uint8_t shell_flags[FNFLAGS]; 806 EXTERN const char *kshname; /* $0 */ 807 EXTERN struct { 808 uid_t kshuid_v; /* real UID of shell */ 809 uid_t ksheuid_v; /* effective UID of shell */ 810 gid_t kshgid_v; /* real GID of shell */ 811 gid_t kshegid_v; /* effective GID of shell */ 812 pid_t kshpgrp_v; /* process group of shell */ 813 pid_t kshppid_v; /* PID of parent of shell */ 814 pid_t kshpid_v; /* $$, shell PID */ 815 } rndsetupstate; 816 817 #define kshpid rndsetupstate.kshpid_v 818 #define kshpgrp rndsetupstate.kshpgrp_v 819 #define kshuid rndsetupstate.kshuid_v 820 #define ksheuid rndsetupstate.ksheuid_v 821 #define kshgid rndsetupstate.kshgid_v 822 #define kshegid rndsetupstate.kshegid_v 823 #define kshppid rndsetupstate.kshppid_v 824 825 826 /* option processing */ 827 #define OF_CMDLINE 0x01 /* command line */ 828 #define OF_SET 0x02 /* set builtin */ 829 #define OF_SPECIAL 0x04 /* a special variable changing */ 830 #define OF_INTERNAL 0x08 /* set internally by shell */ 831 #define OF_FIRSTTIME 0x10 /* as early as possible, once */ 832 #define OF_ANY (OF_CMDLINE | OF_SET | OF_SPECIAL | OF_INTERNAL) 833 834 /* null value for variable; comparison pointer for unset */ 835 EXTERN char null[] E_INIT(""); 836 /* helpers for string pooling */ 837 EXTERN const char Tintovfl[] E_INIT("integer overflow %zu %c %zu prevented"); 838 EXTERN const char Toomem[] E_INIT("can't allocate %zu data bytes"); 839 #if defined(__GNUC__) 840 /* trust this to have string pooling; -Wformat bitches otherwise */ 841 #define Tsynerr "syntax error" 842 #else 843 EXTERN const char Tsynerr[] E_INIT("syntax error"); 844 #endif 845 EXTERN const char Tselect[] E_INIT("select"); 846 EXTERN const char T_typeset[] E_INIT("=typeset"); 847 #define Ttypeset (T_typeset + 1) /* "typeset" */ 848 EXTERN const char Talias[] E_INIT("alias"); 849 EXTERN const char Tunalias[] E_INIT("unalias"); 850 EXTERN const char Tcat[] E_INIT("cat"); 851 #ifdef __OS2__ 852 EXTERN const char Textproc[] E_INIT("extproc"); 853 #endif 854 #ifdef MKSH_PRINTF_BUILTIN 855 EXTERN const char Tprintf[] E_INIT("printf"); 856 #endif 857 EXTERN const char Tsgset[] E_INIT("*=set"); 858 #define Tset (Tsgset + 2) /* "set" */ 859 EXTERN const char Tsgexport[] E_INIT("*=export"); 860 #define Texport (Tsgexport + 2) /* "export" */ 861 EXTERN const char Tsgreadonly[] E_INIT("*=readonly"); 862 #define Treadonly (Tsgreadonly + 2) /* "readonly" */ 863 EXTERN const char Tgbuiltin[] E_INIT("=builtin"); 864 #define Tbuiltin (Tgbuiltin + 1) /* "builtin" */ 865 EXTERN const char T_function[] E_INIT(" function"); 866 #define Tfunction (T_function + 1) /* "function" */ 867 EXTERN const char T_funny_command[] E_INIT("funny $() command"); 868 #define Tcommand (T_funny_command + 10) /* "command" */ 869 EXTERN const char TC_LEX1[] E_INIT("|&;<>() \t\n"); 870 #define TC_IFSWS (TC_LEX1 + 7) /* space tab newline */ 871 872 typedef uint8_t Temp_type; 873 /* expanded heredoc */ 874 #define TT_HEREDOC_EXP 0 875 /* temporary file used for history editing (fc -e) */ 876 #define TT_HIST_EDIT 1 877 /* temporary file used during in-situ command substitution */ 878 #define TT_FUNSUB 2 879 880 /* temp/heredoc files. The file is removed when the struct is freed. */ 881 struct temp { 882 struct temp *next; 883 struct shf *shf; 884 /* pid of process parsed here-doc */ 885 pid_t pid; 886 Temp_type type; 887 /* actually longer: name (variable length) */ 888 char tffn[3]; 889 }; 890 891 /* 892 * stdio and our IO routines 893 */ 894 895 #define shl_xtrace (&shf_iob[0]) /* for set -x */ 896 #define shl_stdout (&shf_iob[1]) 897 #define shl_out (&shf_iob[2]) 898 #ifdef DF 899 #define shl_dbg (&shf_iob[3]) /* for DF() */ 900 #endif 901 EXTERN bool shl_stdout_ok; 902 903 /* 904 * trap handlers 905 */ 906 typedef struct trap { 907 const char *name; /* short name */ 908 const char *mess; /* descriptive name */ 909 char *trap; /* trap command */ 910 sig_t cursig; /* current handler (valid if TF_ORIG_* set) */ 911 sig_t shtrap; /* shell signal handler */ 912 int signal; /* signal number */ 913 int flags; /* TF_* */ 914 volatile sig_atomic_t set; /* trap pending */ 915 } Trap; 916 917 /* values for Trap.flags */ 918 #define TF_SHELL_USES BIT(0) /* shell uses signal, user can't change */ 919 #define TF_USER_SET BIT(1) /* user has (tried to) set trap */ 920 #define TF_ORIG_IGN BIT(2) /* original action was SIG_IGN */ 921 #define TF_ORIG_DFL BIT(3) /* original action was SIG_DFL */ 922 #define TF_EXEC_IGN BIT(4) /* restore SIG_IGN just before exec */ 923 #define TF_EXEC_DFL BIT(5) /* restore SIG_DFL just before exec */ 924 #define TF_DFL_INTR BIT(6) /* when received, default action is LINTR */ 925 #define TF_TTY_INTR BIT(7) /* tty generated signal (see j_waitj) */ 926 #define TF_CHANGED BIT(8) /* used by runtrap() to detect trap changes */ 927 #define TF_FATAL BIT(9) /* causes termination if not trapped */ 928 929 /* values for setsig()/setexecsig() flags argument */ 930 #define SS_RESTORE_MASK 0x3 /* how to restore a signal before an exec() */ 931 #define SS_RESTORE_CURR 0 /* leave current handler in place */ 932 #define SS_RESTORE_ORIG 1 /* restore original handler */ 933 #define SS_RESTORE_DFL 2 /* restore to SIG_DFL */ 934 #define SS_RESTORE_IGN 3 /* restore to SIG_IGN */ 935 #define SS_FORCE BIT(3) /* set signal even if original signal ignored */ 936 #define SS_USER BIT(4) /* user is doing the set (ie, trap command) */ 937 #define SS_SHTRAP BIT(5) /* trap for internal use (ALRM, CHLD, WINCH) */ 938 939 #define ksh_SIGEXIT 0 /* for trap EXIT */ 940 #define ksh_SIGERR ksh_NSIG /* for trap ERR */ 941 942 EXTERN volatile sig_atomic_t trap; /* traps pending? */ 943 EXTERN volatile sig_atomic_t intrsig; /* pending trap interrupts command */ 944 EXTERN volatile sig_atomic_t fatal_trap; /* received a fatal signal */ 945 extern Trap sigtraps[ksh_NSIG + 1]; 946 947 /* got_winch = 1 when we need to re-adjust the window size */ 948 #ifdef SIGWINCH 949 EXTERN volatile sig_atomic_t got_winch E_INIT(1); 950 #else 951 #define got_winch true 952 #endif 953 954 /* 955 * TMOUT support 956 */ 957 /* values for ksh_tmout_state */ 958 enum tmout_enum { 959 TMOUT_EXECUTING = 0, /* executing commands */ 960 TMOUT_READING, /* waiting for input */ 961 TMOUT_LEAVING /* have timed out */ 962 }; 963 EXTERN unsigned int ksh_tmout; 964 EXTERN enum tmout_enum ksh_tmout_state E_INIT(TMOUT_EXECUTING); 965 966 /* For "You have stopped jobs" message */ 967 EXTERN bool really_exit; 968 969 /* 970 * fast character classes 971 */ 972 #define C_ALPHA BIT(0) /* a-z_A-Z */ 973 #define C_DIGIT BIT(1) /* 0-9 */ 974 #define C_LEX1 BIT(2) /* \t \n\0|&;<>() */ 975 #define C_VAR1 BIT(3) /* *@#!$-? */ 976 #define C_IFSWS BIT(4) /* \t \n (IFS white space) */ 977 #define C_SUBOP1 BIT(5) /* "=-+?" */ 978 #define C_QUOTE BIT(6) /* \t\n "#$&'()*;<=>?[\]`| (needing quoting) */ 979 #define C_IFS BIT(7) /* $IFS */ 980 #define C_SUBOP2 BIT(8) /* "#%" (magic, see below) */ 981 982 extern unsigned char chtypes[]; 983 984 #define ctype(c, t) tobool( ((t) == C_SUBOP2) ? \ 985 (((c) == '#' || (c) == '%') ? 1 : 0) : \ 986 (chtypes[(unsigned char)(c)] & (t)) ) 987 #define ord(c) ((int)(unsigned char)(c)) 988 #define ksh_isalphx(c) ctype((c), C_ALPHA) 989 #define ksh_isalnux(c) ctype((c), C_ALPHA | C_DIGIT) 990 #define ksh_isdigit(c) (((c) >= '0') && ((c) <= '9')) 991 #define ksh_islower(c) (((c) >= 'a') && ((c) <= 'z')) 992 #define ksh_isupper(c) (((c) >= 'A') && ((c) <= 'Z')) 993 #define ksh_tolower(c) (ksh_isupper(c) ? (c) - 'A' + 'a' : (c)) 994 #define ksh_toupper(c) (ksh_islower(c) ? (c) - 'a' + 'A' : (c)) 995 #define ksh_isdash(s) (((s)[0] == '-') && ((s)[1] == '\0')) 996 #define ksh_isspace(c) ((((c) >= 0x09) && ((c) <= 0x0D)) || ((c) == 0x20)) 997 #define ksh_eq(c,u,l) (((c) | 0x20) == (l)) 998 #define ksh_numdig(c) ((c) - ord('0')) 999 #define ksh_numuc(c) ((c) - ord('A')) 1000 #define ksh_numlc(c) ((c) - ord('a')) 1001 1002 EXTERN int ifs0 E_INIT(' '); /* for "$*" */ 1003 1004 /* Argument parsing for built-in commands and getopts command */ 1005 1006 /* Values for Getopt.flags */ 1007 #define GF_ERROR BIT(0) /* call errorf() if there is an error */ 1008 #define GF_PLUSOPT BIT(1) /* allow +c as an option */ 1009 #define GF_NONAME BIT(2) /* don't print argv[0] in errors */ 1010 1011 /* Values for Getopt.info */ 1012 #define GI_MINUS BIT(0) /* an option started with -... */ 1013 #define GI_PLUS BIT(1) /* an option started with +... */ 1014 #define GI_MINUSMINUS BIT(2) /* arguments were ended with -- */ 1015 1016 /* in case some OS defines these */ 1017 #undef optarg 1018 #undef optind 1019 1020 typedef struct { 1021 const char *optarg; 1022 int optind; 1023 int uoptind; /* what user sees in $OPTIND */ 1024 int flags; /* see GF_* */ 1025 int info; /* see GI_* */ 1026 unsigned int p; /* 0 or index into argv[optind - 1] */ 1027 char buf[2]; /* for bad option OPTARG value */ 1028 } Getopt; 1029 1030 EXTERN Getopt builtin_opt; /* for shell builtin commands */ 1031 EXTERN Getopt user_opt; /* parsing state for getopts builtin command */ 1032 1033 /* This for co-processes */ 1034 1035 /* something that won't (realisticly) wrap */ 1036 typedef int Coproc_id; 1037 1038 struct coproc { 1039 void *job; /* 0 or job of co-process using input pipe */ 1040 int read; /* pipe from co-process's stdout */ 1041 int readw; /* other side of read (saved temporarily) */ 1042 int write; /* pipe to co-process's stdin */ 1043 int njobs; /* number of live jobs using output pipe */ 1044 Coproc_id id; /* id of current output pipe */ 1045 }; 1046 EXTERN struct coproc coproc; 1047 1048 #ifndef MKSH_NOPROSPECTOFWORK 1049 /* used in jobs.c and by coprocess stuff in exec.c and select() calls */ 1050 EXTERN sigset_t sm_default, sm_sigchld; 1051 #endif 1052 1053 /* name of called builtin function (used by error functions) */ 1054 EXTERN const char *builtin_argv0; 1055 /* is called builtin SPEC_BI? (also KEEPASN, odd use though) */ 1056 EXTERN bool builtin_spec; 1057 1058 /* current working directory */ 1059 EXTERN char *current_wd; 1060 1061 /* input line size */ 1062 #define LINE (4096 - ALLOC_SIZE) 1063 /* 1064 * Minimum required space to work with on a line - if the prompt leaves 1065 * less space than this on a line, the prompt is truncated. 1066 */ 1067 #define MIN_EDIT_SPACE 7 1068 /* 1069 * Minimum allowed value for x_cols: 2 for prompt, 3 for " < " at end of line 1070 */ 1071 #define MIN_COLS (2 + MIN_EDIT_SPACE + 3) 1072 #define MIN_LINS 3 1073 EXTERN mksh_ari_t x_cols E_INIT(80); /* tty columns */ 1074 EXTERN mksh_ari_t x_lins E_INIT(24); /* tty lines */ 1075 1076 1077 /* Determine the location of the system (common) profile */ 1078 1079 #ifndef MKSH_DEFAULT_PROFILEDIR 1080 #define MKSH_DEFAULT_PROFILEDIR "/etc" 1081 #endif 1082 1083 #define MKSH_SYSTEM_PROFILE MKSH_DEFAULT_PROFILEDIR "/profile" 1084 #define MKSH_SUID_PROFILE MKSH_DEFAULT_PROFILEDIR "/suid_profile" 1085 1086 1087 /* Used by v_evaluate() and setstr() to control action when error occurs */ 1088 #define KSH_UNWIND_ERROR 0 /* unwind the stack (kshlongjmp) */ 1089 #define KSH_RETURN_ERROR 1 /* return 1/0 for success/failure */ 1090 1091 /* 1092 * Shell file I/O routines 1093 */ 1094 1095 #define SHF_BSIZE 512 1096 1097 #define shf_fileno(shf) ((shf)->fd) 1098 #define shf_setfileno(shf,nfd) ((shf)->fd = (nfd)) 1099 #define shf_getc_i(shf) ((shf)->rnleft > 0 ? \ 1100 (shf)->rnleft--, *(shf)->rp++ : \ 1101 shf_getchar(shf)) 1102 #define shf_putc_i(c, shf) ((shf)->wnleft == 0 ? \ 1103 shf_putchar((c), (shf)) : \ 1104 ((shf)->wnleft--, *(shf)->wp++ = (c))) 1105 #define shf_eof(shf) ((shf)->flags & SHF_EOF) 1106 #define shf_error(shf) ((shf)->flags & SHF_ERROR) 1107 #define shf_errno(shf) ((shf)->errnosv) 1108 #define shf_clearerr(shf) ((shf)->flags &= ~(SHF_EOF | SHF_ERROR)) 1109 1110 /* Flags passed to shf_*open() */ 1111 #define SHF_RD 0x0001 1112 #define SHF_WR 0x0002 1113 #define SHF_RDWR (SHF_RD|SHF_WR) 1114 #define SHF_ACCMODE 0x0003 /* mask */ 1115 #define SHF_GETFL 0x0004 /* use fcntl() to figure RD/WR flags */ 1116 #define SHF_UNBUF 0x0008 /* unbuffered I/O */ 1117 #define SHF_CLEXEC 0x0010 /* set close on exec flag */ 1118 #define SHF_MAPHI 0x0020 /* make fd > FDBASE (and close orig) 1119 * (shf_open() only) */ 1120 #define SHF_DYNAMIC 0x0040 /* string: increase buffer as needed */ 1121 #define SHF_INTERRUPT 0x0080 /* EINTR in read/write causes error */ 1122 /* Flags used internally */ 1123 #define SHF_STRING 0x0100 /* a string, not a file */ 1124 #define SHF_ALLOCS 0x0200 /* shf and shf->buf were alloc()ed */ 1125 #define SHF_ALLOCB 0x0400 /* shf->buf was alloc()ed */ 1126 #define SHF_ERROR 0x0800 /* read()/write() error */ 1127 #define SHF_EOF 0x1000 /* read eof (sticky) */ 1128 #define SHF_READING 0x2000 /* currently reading: rnleft,rp valid */ 1129 #define SHF_WRITING 0x4000 /* currently writing: wnleft,wp valid */ 1130 1131 1132 struct shf { 1133 Area *areap; /* area shf/buf were allocated in */ 1134 unsigned char *rp; /* read: current position in buffer */ 1135 unsigned char *wp; /* write: current position in buffer */ 1136 unsigned char *buf; /* buffer */ 1137 ssize_t bsize; /* actual size of buf */ 1138 ssize_t rbsize; /* size of buffer (1 if SHF_UNBUF) */ 1139 ssize_t rnleft; /* read: how much data left in buffer */ 1140 ssize_t wbsize; /* size of buffer (0 if SHF_UNBUF) */ 1141 ssize_t wnleft; /* write: how much space left in buffer */ 1142 int flags; /* see SHF_* */ 1143 int fd; /* file descriptor */ 1144 int errnosv; /* saved value of errno after error */ 1145 }; 1146 1147 extern struct shf shf_iob[]; 1148 1149 struct table { 1150 Area *areap; /* area to allocate entries */ 1151 struct tbl **tbls; /* hashed table items */ 1152 size_t nfree; /* free table entries */ 1153 uint8_t tshift; /* table size (2^tshift) */ 1154 }; 1155 1156 /* table item */ 1157 struct tbl { 1158 /* Area to allocate from */ 1159 Area *areap; 1160 /* value */ 1161 union { 1162 char *s; /* string */ 1163 mksh_ari_t i; /* integer */ 1164 mksh_uari_t u; /* unsigned integer */ 1165 int (*f)(const char **); /* built-in command */ 1166 struct op *t; /* "function" tree */ 1167 } val; 1168 union { 1169 struct tbl *array; /* array values */ 1170 const char *fpath; /* temporary path to undef function */ 1171 } u; 1172 union { 1173 int field; /* field with for -L/-R/-Z */ 1174 int errnov; /* CEXEC/CTALIAS */ 1175 } u2; 1176 union { 1177 uint32_t hval; /* hash(name) */ 1178 uint32_t index; /* index for an array */ 1179 } ua; 1180 /* 1181 * command type (see below), base (if INTEGER), 1182 * offset from val.s of value (if EXPORT) 1183 */ 1184 int type; 1185 /* flags (see below) */ 1186 uint32_t flag; 1187 1188 /* actually longer: name (variable length) */ 1189 char name[4]; 1190 }; 1191 1192 EXTERN struct tbl vtemp; 1193 /* set by global() and local() */ 1194 EXTERN bool last_lookup_was_array; 1195 1196 /* common flag bits */ 1197 #define ALLOC BIT(0) /* val.s has been allocated */ 1198 #define DEFINED BIT(1) /* is defined in block */ 1199 #define ISSET BIT(2) /* has value, vp->val.[si] */ 1200 #define EXPORT BIT(3) /* exported variable/function */ 1201 #define TRACE BIT(4) /* var: user flagged, func: execution tracing */ 1202 /* (start non-common flags at 8) */ 1203 /* flag bits used for variables */ 1204 #define SPECIAL BIT(8) /* PATH, IFS, SECONDS, etc */ 1205 #define INTEGER BIT(9) /* val.i contains integer value */ 1206 #define RDONLY BIT(10) /* read-only variable */ 1207 #define LOCAL BIT(11) /* for local typeset() */ 1208 #define ARRAY BIT(13) /* array */ 1209 #define LJUST BIT(14) /* left justify */ 1210 #define RJUST BIT(15) /* right justify */ 1211 #define ZEROFIL BIT(16) /* 0 filled if RJUSTIFY, strip 0s if LJUSTIFY */ 1212 #define LCASEV BIT(17) /* convert to lower case */ 1213 #define UCASEV_AL BIT(18) /* convert to upper case / autoload function */ 1214 #define INT_U BIT(19) /* unsigned integer */ 1215 #define INT_L BIT(20) /* long integer (no-op but used as magic) */ 1216 #define IMPORT BIT(21) /* flag to typeset(): no arrays, must have = */ 1217 #define LOCAL_COPY BIT(22) /* with LOCAL - copy attrs from existing var */ 1218 #define EXPRINEVAL BIT(23) /* contents currently being evaluated */ 1219 #define EXPRLVALUE BIT(24) /* useable as lvalue (temp flag) */ 1220 #define AINDEX BIT(25) /* array index >0 = ua.index filled in */ 1221 #define ASSOC BIT(26) /* ARRAY ? associative : reference */ 1222 /* flag bits used for taliases/builtins/aliases/keywords/functions */ 1223 #define KEEPASN BIT(8) /* keep command assignments (eg, var=x cmd) */ 1224 #define FINUSE BIT(9) /* function being executed */ 1225 #define FDELETE BIT(10) /* function deleted while it was executing */ 1226 #define FKSH BIT(11) /* function defined with function x (vs x()) */ 1227 #define SPEC_BI BIT(12) /* a POSIX special builtin */ 1228 /* 1229 * Attributes that can be set by the user (used to decide if an unset 1230 * param should be repoted by set/typeset). Does not include ARRAY or 1231 * LOCAL. 1232 */ 1233 #define USERATTRIB (EXPORT|INTEGER|RDONLY|LJUST|RJUST|ZEROFIL|\ 1234 LCASEV|UCASEV_AL|INT_U|INT_L) 1235 1236 #define arrayindex(vp) ((unsigned long)((vp)->flag & AINDEX ? \ 1237 (vp)->ua.index : 0)) 1238 1239 enum namerefflag { 1240 SRF_NOP, 1241 SRF_ENABLE, 1242 SRF_DISABLE 1243 }; 1244 1245 /* command types */ 1246 #define CNONE 0 /* undefined */ 1247 #define CSHELL 1 /* built-in */ 1248 #define CFUNC 2 /* function */ 1249 #define CEXEC 4 /* executable command */ 1250 #define CALIAS 5 /* alias */ 1251 #define CKEYWD 6 /* keyword */ 1252 #define CTALIAS 7 /* tracked alias */ 1253 1254 /* Flags for findcom()/comexec() */ 1255 #define FC_SPECBI BIT(0) /* special builtin */ 1256 #define FC_FUNC BIT(1) /* function */ 1257 #define FC_NORMBI BIT(2) /* not special builtin */ 1258 #define FC_BI (FC_SPECBI | FC_NORMBI) 1259 #define FC_PATH BIT(3) /* do path search */ 1260 #define FC_DEFPATH BIT(4) /* use default path in path search */ 1261 1262 1263 #define AF_ARGV_ALLOC 0x1 /* argv[] array allocated */ 1264 #define AF_ARGS_ALLOCED 0x2 /* argument strings allocated */ 1265 #define AI_ARGV(a, i) ((i) == 0 ? (a).argv[0] : (a).argv[(i) - (a).skip]) 1266 #define AI_ARGC(a) ((a).ai_argc - (a).skip) 1267 1268 /* Argument info. Used for $#, $* for shell, functions, includes, etc. */ 1269 struct arg_info { 1270 const char **argv; 1271 int flags; /* AF_* */ 1272 int ai_argc; 1273 int skip; /* first arg is argv[0], second is argv[1 + skip] */ 1274 }; 1275 1276 /* 1277 * activation record for function blocks 1278 */ 1279 struct block { 1280 Area area; /* area to allocate things */ 1281 const char **argv; 1282 char *error; /* error handler */ 1283 char *exit; /* exit handler */ 1284 struct block *next; /* enclosing block */ 1285 struct table vars; /* local variables */ 1286 struct table funs; /* local functions */ 1287 Getopt getopts_state; 1288 int argc; 1289 int flags; /* see BF_* */ 1290 }; 1291 1292 /* Values for struct block.flags */ 1293 #define BF_DOGETOPTS BIT(0) /* save/restore getopts state */ 1294 #define BF_STOPENV BIT(1) /* do not export further */ 1295 1296 /* 1297 * Used by ktwalk() and ktnext() routines. 1298 */ 1299 struct tstate { 1300 struct tbl **next; 1301 ssize_t left; 1302 }; 1303 1304 EXTERN struct table taliases; /* tracked aliases */ 1305 EXTERN struct table builtins; /* built-in commands */ 1306 EXTERN struct table aliases; /* aliases */ 1307 EXTERN struct table keywords; /* keywords */ 1308 #ifndef MKSH_NOPWNAM 1309 EXTERN struct table homedirs; /* homedir() cache */ 1310 #endif 1311 1312 struct builtin { 1313 const char *name; 1314 int (*func)(const char **); 1315 }; 1316 1317 extern const struct builtin mkshbuiltins[]; 1318 1319 /* values for set_prompt() */ 1320 #define PS1 0 /* command */ 1321 #define PS2 1 /* command continuation */ 1322 1323 EXTERN char *path; /* copy of either PATH or def_path */ 1324 EXTERN const char *def_path; /* path to use if PATH not set */ 1325 EXTERN char *tmpdir; /* TMPDIR value */ 1326 EXTERN const char *prompt; 1327 EXTERN uint8_t cur_prompt; /* PS1 or PS2 */ 1328 EXTERN int current_lineno; /* LINENO value */ 1329 1330 /* 1331 * Description of a command or an operation on commands. 1332 */ 1333 struct op { 1334 const char **args; /* arguments to a command */ 1335 char **vars; /* variable assignments */ 1336 struct ioword **ioact; /* IO actions (eg, < > >>) */ 1337 struct op *left, *right; /* descendents */ 1338 char *str; /* word for case; identifier for for, 1339 * select, and functions; 1340 * path to execute for TEXEC; 1341 * time hook for TCOM. 1342 */ 1343 int lineno; /* TCOM/TFUNC: LINENO for this */ 1344 short type; /* operation type, see below */ 1345 /* WARNING: newtp(), tcopy() use evalflags = 0 to clear union */ 1346 union { 1347 /* TCOM: arg expansion eval() flags */ 1348 short evalflags; 1349 /* TFUNC: function x (vs x()) */ 1350 short ksh_func; 1351 /* TPAT: termination character */ 1352 char charflag; 1353 } u; 1354 }; 1355 1356 /* Tree.type values */ 1357 #define TEOF 0 1358 #define TCOM 1 /* command */ 1359 #define TPAREN 2 /* (c-list) */ 1360 #define TPIPE 3 /* a | b */ 1361 #define TLIST 4 /* a ; b */ 1362 #define TOR 5 /* || */ 1363 #define TAND 6 /* && */ 1364 #define TBANG 7 /* ! */ 1365 #define TDBRACKET 8 /* [[ .. ]] */ 1366 #define TFOR 9 1367 #define TSELECT 10 1368 #define TCASE 11 1369 #define TIF 12 1370 #define TWHILE 13 1371 #define TUNTIL 14 1372 #define TELIF 15 1373 #define TPAT 16 /* pattern in case */ 1374 #define TBRACE 17 /* {c-list} */ 1375 #define TASYNC 18 /* c & */ 1376 #define TFUNCT 19 /* function name { command; } */ 1377 #define TTIME 20 /* time pipeline */ 1378 #define TEXEC 21 /* fork/exec eval'd TCOM */ 1379 #define TCOPROC 22 /* coprocess |& */ 1380 1381 /* 1382 * prefix codes for words in command tree 1383 */ 1384 #define EOS 0 /* end of string */ 1385 #define CHAR 1 /* unquoted character */ 1386 #define QCHAR 2 /* quoted character */ 1387 #define COMSUB 3 /* $() substitution (0 terminated) */ 1388 #define EXPRSUB 4 /* $(()) substitution (0 terminated) */ 1389 #define OQUOTE 5 /* opening " or ' */ 1390 #define CQUOTE 6 /* closing " or ' */ 1391 #define OSUBST 7 /* opening ${ subst (followed by { or X) */ 1392 #define CSUBST 8 /* closing } of above (followed by } or X) */ 1393 #define OPAT 9 /* open pattern: *(, @(, etc. */ 1394 #define SPAT 10 /* separate pattern: | */ 1395 #define CPAT 11 /* close pattern: ) */ 1396 #define ADELIM 12 /* arbitrary delimiter: ${foo:2:3} ${foo/bar/baz} */ 1397 #define FUNSUB 14 /* ${ foo;} substitution (NUL terminated) */ 1398 #define VALSUB 15 /* ${|foo;} substitution (NUL terminated) */ 1399 1400 /* 1401 * IO redirection 1402 */ 1403 struct ioword { 1404 char *ioname; /* filename (unused if heredoc) */ 1405 char *delim; /* delimiter for <<, <<- */ 1406 char *heredoc; /* content of heredoc */ 1407 unsigned short ioflag; /* action (below) */ 1408 short unit; /* unit (fd) affected */ 1409 }; 1410 1411 /* ioword.flag - type of redirection */ 1412 #define IOTYPE 0xF /* type: bits 0:3 */ 1413 #define IOREAD 0x1 /* < */ 1414 #define IOWRITE 0x2 /* > */ 1415 #define IORDWR 0x3 /* <>: todo */ 1416 #define IOHERE 0x4 /* << (here file) */ 1417 #define IOCAT 0x5 /* >> */ 1418 #define IODUP 0x6 /* <&/>& */ 1419 #define IOEVAL BIT(4) /* expand in << */ 1420 #define IOSKIP BIT(5) /* <<-, skip ^\t* */ 1421 #define IOCLOB BIT(6) /* >|, override -o noclobber */ 1422 #define IORDUP BIT(7) /* x<&y (as opposed to x>&y) */ 1423 #define IONAMEXP BIT(8) /* name has been expanded */ 1424 #define IOBASH BIT(9) /* &> etc. */ 1425 #define IOHERESTR BIT(10) /* <<< (here string) */ 1426 #define IONDELIM BIT(11) /* null delimiter (<<) */ 1427 1428 /* execute/exchild flags */ 1429 #define XEXEC BIT(0) /* execute without forking */ 1430 #define XFORK BIT(1) /* fork before executing */ 1431 #define XBGND BIT(2) /* command & */ 1432 #define XPIPEI BIT(3) /* input is pipe */ 1433 #define XPIPEO BIT(4) /* output is pipe */ 1434 #define XXCOM BIT(5) /* `...` command */ 1435 #define XPCLOSE BIT(6) /* exchild: close close_fd in parent */ 1436 #define XCCLOSE BIT(7) /* exchild: close close_fd in child */ 1437 #define XERROK BIT(8) /* non-zero exit ok (for set -e) */ 1438 #define XCOPROC BIT(9) /* starting a co-process */ 1439 #define XTIME BIT(10) /* timing TCOM command */ 1440 #define XPIPEST BIT(11) /* want PIPESTATUS */ 1441 1442 /* 1443 * flags to control expansion of words (assumed by t->evalflags to fit 1444 * in a short) 1445 */ 1446 #define DOBLANK BIT(0) /* perform blank interpretation */ 1447 #define DOGLOB BIT(1) /* expand [?* */ 1448 #define DOPAT BIT(2) /* quote *?[ */ 1449 #define DOTILDE BIT(3) /* normal ~ expansion (first char) */ 1450 #define DONTRUNCOMMAND BIT(4) /* do not run $(command) things */ 1451 #define DOASNTILDE BIT(5) /* assignment ~ expansion (after =, :) */ 1452 #define DOBRACE BIT(6) /* used by expand(): do brace expansion */ 1453 #define DOMAGIC BIT(7) /* used by expand(): string contains MAGIC */ 1454 #define DOTEMP BIT(8) /* dito: in word part of ${..[%#=?]..} */ 1455 #define DOVACHECK BIT(9) /* var assign check (for typeset, set, etc) */ 1456 #define DOMARKDIRS BIT(10) /* force markdirs behaviour */ 1457 #define DOTCOMEXEC BIT(11) /* not an eval flag, used by sh -c hack */ 1458 #define DOSCALAR BIT(12) /* change field handling to non-list context */ 1459 #define DOHEREDOC BIT(13) /* change scalar handling to heredoc body */ 1460 #define DOHERESTR BIT(14) /* append a newline char */ 1461 1462 #define X_EXTRA 20 /* this many extra bytes in X string */ 1463 1464 typedef struct XString { 1465 char *end, *beg; /* end, begin of string */ 1466 size_t len; /* length */ 1467 Area *areap; /* area to allocate/free from */ 1468 } XString; 1469 1470 typedef char *XStringP; 1471 1472 /* initialise expandable string */ 1473 #define XinitN(xs, length, area) do { \ 1474 (xs).len = (length); \ 1475 (xs).areap = (area); \ 1476 (xs).beg = alloc((xs).len + X_EXTRA, (xs).areap); \ 1477 (xs).end = (xs).beg + (xs).len; \ 1478 } while (/* CONSTCOND */ 0) 1479 #define Xinit(xs, xp, length, area) do { \ 1480 XinitN((xs), (length), (area)); \ 1481 (xp) = (xs).beg; \ 1482 } while (/* CONSTCOND */ 0) 1483 1484 /* stuff char into string */ 1485 #define Xput(xs, xp, c) (*xp++ = (c)) 1486 1487 /* check if there are at least n bytes left */ 1488 #define XcheckN(xs, xp, n) do { \ 1489 ssize_t more = ((xp) + (n)) - (xs).end; \ 1490 if (more > 0) \ 1491 (xp) = Xcheck_grow(&(xs), (xp), (size_t)more); \ 1492 } while (/* CONSTCOND */ 0) 1493 1494 /* check for overflow, expand string */ 1495 #define Xcheck(xs, xp) XcheckN((xs), (xp), 1) 1496 1497 /* free string */ 1498 #define Xfree(xs, xp) afree((xs).beg, (xs).areap) 1499 1500 /* close, return string */ 1501 #define Xclose(xs, xp) aresize((xs).beg, (xp) - (xs).beg, (xs).areap) 1502 1503 /* begin of string */ 1504 #define Xstring(xs, xp) ((xs).beg) 1505 1506 #define Xnleft(xs, xp) ((xs).end - (xp)) /* may be less than 0 */ 1507 #define Xlength(xs, xp) ((xp) - (xs).beg) 1508 #define Xsize(xs, xp) ((xs).end - (xs).beg) 1509 #define Xsavepos(xs, xp) ((xp) - (xs).beg) 1510 #define Xrestpos(xs, xp, n) ((xs).beg + (n)) 1511 1512 char *Xcheck_grow(XString *, const char *, size_t); 1513 1514 /* 1515 * expandable vector of generic pointers 1516 */ 1517 1518 typedef struct { 1519 /* begin of allocated area */ 1520 void **beg; 1521 /* currently used number of entries */ 1522 size_t len; 1523 /* allocated number of entries */ 1524 size_t siz; 1525 } XPtrV; 1526 1527 #define XPinit(x, n) do { \ 1528 (x).siz = (n); \ 1529 (x).len = 0; \ 1530 (x).beg = alloc2((x).siz, sizeof(void *), ATEMP); \ 1531 } while (/* CONSTCOND */ 0) \ 1532 1533 #define XPput(x, p) do { \ 1534 if ((x).len == (x).siz) { \ 1535 (x).beg = aresize2((x).beg, (x).siz, \ 1536 2 * sizeof(void *), ATEMP); \ 1537 (x).siz <<= 1; \ 1538 } \ 1539 (x).beg[(x).len++] = (p); \ 1540 } while (/* CONSTCOND */ 0) 1541 1542 #define XPptrv(x) ((x).beg) 1543 #define XPsize(x) ((x).len) 1544 #define XPclose(x) aresize2((x).beg, XPsize(x), sizeof(void *), ATEMP) 1545 #define XPfree(x) afree((x).beg, ATEMP) 1546 1547 /* 1548 * Lexer internals 1549 */ 1550 1551 typedef struct source Source; 1552 struct source { 1553 const char *str; /* input pointer */ 1554 const char *start; /* start of current buffer */ 1555 union { 1556 const char **strv; /* string [] */ 1557 struct shf *shf; /* shell file */ 1558 struct tbl *tblp; /* alias (SF_HASALIAS) */ 1559 char *freeme; /* also for SREREAD */ 1560 } u; 1561 const char *file; /* input file name */ 1562 int type; /* input type */ 1563 int line; /* line number */ 1564 int errline; /* line the error occurred on (0 if not set) */ 1565 int flags; /* SF_* */ 1566 Area *areap; 1567 Source *next; /* stacked source */ 1568 XString xs; /* input buffer */ 1569 char ugbuf[2]; /* buffer for ungetsc() (SREREAD) and 1570 * alias (SALIAS) */ 1571 }; 1572 1573 /* Source.type values */ 1574 #define SEOF 0 /* input EOF */ 1575 #define SFILE 1 /* file input */ 1576 #define SSTDIN 2 /* read stdin */ 1577 #define SSTRING 3 /* string */ 1578 #define SWSTR 4 /* string without \n */ 1579 #define SWORDS 5 /* string[] */ 1580 #define SWORDSEP 6 /* string[] separator */ 1581 #define SALIAS 7 /* alias expansion */ 1582 #define SREREAD 8 /* read ahead to be re-scanned */ 1583 #define SSTRINGCMDLINE 9 /* string from "mksh -c ..." */ 1584 1585 /* Source.flags values */ 1586 #define SF_ECHO BIT(0) /* echo input to shlout */ 1587 #define SF_ALIAS BIT(1) /* faking space at end of alias */ 1588 #define SF_ALIASEND BIT(2) /* faking space at end of alias */ 1589 #define SF_TTY BIT(3) /* type == SSTDIN & it is a tty */ 1590 #define SF_HASALIAS BIT(4) /* u.tblp valid (SALIAS, SEOF) */ 1591 #define SF_MAYEXEC BIT(5) /* special sh -c optimisation hack */ 1592 1593 typedef union { 1594 int i; 1595 char *cp; 1596 char **wp; 1597 struct op *o; 1598 struct ioword *iop; 1599 } YYSTYPE; 1600 1601 /* If something is added here, add it to tokentab[] in syn.c as well */ 1602 #define LWORD 256 1603 #define LOGAND 257 /* && */ 1604 #define LOGOR 258 /* || */ 1605 #define BREAK 259 /* ;; */ 1606 #define IF 260 1607 #define THEN 261 1608 #define ELSE 262 1609 #define ELIF 263 1610 #define FI 264 1611 #define CASE 265 1612 #define ESAC 266 1613 #define FOR 267 1614 #define SELECT 268 1615 #define WHILE 269 1616 #define UNTIL 270 1617 #define DO 271 1618 #define DONE 272 1619 #define IN 273 1620 #define FUNCTION 274 1621 #define TIME 275 1622 #define REDIR 276 1623 #define MDPAREN 277 /* (( )) */ 1624 #define BANG 278 /* ! */ 1625 #define DBRACKET 279 /* [[ .. ]] */ 1626 #define COPROC 280 /* |& */ 1627 #define BRKEV 281 /* ;| */ 1628 #define BRKFT 282 /* ;& */ 1629 #define YYERRCODE 300 1630 1631 /* flags to yylex */ 1632 #define CONTIN BIT(0) /* skip new lines to complete command */ 1633 #define ONEWORD BIT(1) /* single word for substitute() */ 1634 #define ALIAS BIT(2) /* recognise alias */ 1635 #define KEYWORD BIT(3) /* recognise keywords */ 1636 #define LETEXPR BIT(4) /* get expression inside (( )) */ 1637 #define CMDASN BIT(5) /* parse x[1 & 2] as one word, for typeset */ 1638 #define HEREDOC BIT(6) /* parsing a here document body */ 1639 #define ESACONLY BIT(7) /* only accept esac keyword */ 1640 #define CMDWORD BIT(8) /* parsing simple command (alias related) */ 1641 #define HEREDELIM BIT(9) /* parsing <<,<<- delimiter */ 1642 #define LQCHAR BIT(10) /* source string contains QCHAR */ 1643 1644 #define HERES 10 /* max number of << in line */ 1645 1646 #undef CTRL 1647 #define CTRL(x) ((x) == '?' ? 0x7F : (x) & 0x1F) /* ASCII */ 1648 #define UNCTRL(x) ((x) ^ 0x40) /* ASCII */ 1649 #define ISCTRL(x) (((signed char)((uint8_t)(x) + 1)) < 33) 1650 1651 #define IDENT 64 1652 1653 EXTERN Source *source; /* yyparse/yylex source */ 1654 EXTERN YYSTYPE yylval; /* result from yylex */ 1655 EXTERN struct ioword *heres[HERES], **herep; 1656 EXTERN char ident[IDENT + 1]; 1657 1658 EXTERN char **history; /* saved commands */ 1659 EXTERN char **histptr; /* last history item */ 1660 EXTERN mksh_ari_t histsize; /* history size */ 1661 1662 /* flags to histsave */ 1663 #define HIST_FLUSH 0 1664 #define HIST_QUEUE 1 1665 #define HIST_APPEND 2 1666 #define HIST_STORE 3 1667 #define HIST_NOTE 4 1668 1669 /* user and system time of last j_waitjed job */ 1670 EXTERN struct timeval j_usrtime, j_systime; 1671 1672 #define notok2mul(max, val, c) (((val) != 0) && ((c) != 0) && \ 1673 (((max) / (c)) < (val))) 1674 #define notok2add(max, val, c) ((val) > ((max) - (c))) 1675 #define notoktomul(val, cnst) notok2mul(SIZE_MAX, (val), (cnst)) 1676 #define notoktoadd(val, cnst) notok2add(SIZE_MAX, (val), (cnst)) 1677 #define checkoktoadd(val, cnst) do { \ 1678 if (notoktoadd((val), (cnst))) \ 1679 internal_errorf(Tintovfl, (size_t)(val), \ 1680 '+', (size_t)(cnst)); \ 1681 } while (/* CONSTCOND */ 0) 1682 1683 1684 /* lalloc.c */ 1685 void ainit(Area *); 1686 void afreeall(Area *); 1687 /* these cannot fail and can take NULL (not for ap) */ 1688 #define alloc(n, ap) aresize(NULL, (n), (ap)) 1689 #define alloc2(m, n, ap) aresize2(NULL, (m), (n), (ap)) 1690 void *aresize(void *, size_t, Area *); 1691 void *aresize2(void *, size_t, size_t, Area *); 1692 void afree(void *, Area *); /* can take NULL */ 1693 /* edit.c */ 1694 #ifndef MKSH_NO_CMDLINE_EDITING 1695 #ifndef MKSH_SMALL 1696 int x_bind(const char *, const char *, bool, bool); 1697 #else 1698 int x_bind(const char *, const char *, bool); 1699 #endif 1700 void x_init(void); 1701 #ifdef DEBUG_LEAKS 1702 void x_done(void); 1703 #endif 1704 int x_read(char *); 1705 #endif 1706 void x_mkraw(int, mksh_ttyst *, bool); 1707 /* eval.c */ 1708 char *substitute(const char *, int); 1709 char **eval(const char **, int); 1710 char *evalstr(const char *cp, int); 1711 char *evalonestr(const char *cp, int); 1712 char *debunk(char *, const char *, size_t); 1713 void expand(const char *, XPtrV *, int); 1714 int glob_str(char *, XPtrV *, bool); 1715 char *do_tilde(char *); 1716 /* exec.c */ 1717 int execute(struct op * volatile, volatile int, volatile int * volatile); 1718 int shcomexec(const char **); 1719 struct tbl *findfunc(const char *, uint32_t, bool); 1720 int define(const char *, struct op *); 1721 const char *builtin(const char *, int (*)(const char **)); 1722 struct tbl *findcom(const char *, int); 1723 void flushcom(bool); 1724 int search_access(const char *, int); 1725 const char *search_path(const char *, const char *, int, int *); 1726 void pr_menu(const char * const *); 1727 void pr_list(char * const *); 1728 /* expr.c */ 1729 int evaluate(const char *, mksh_ari_t *, int, bool); 1730 int v_evaluate(struct tbl *, const char *, volatile int, bool); 1731 /* UTF-8 stuff */ 1732 size_t utf_mbtowc(unsigned int *, const char *); 1733 size_t utf_wctomb(char *, unsigned int); 1734 int utf_widthadj(const char *, const char **); 1735 size_t utf_mbswidth(const char *) MKSH_A_PURE; 1736 const char *utf_skipcols(const char *, int) MKSH_A_PURE; 1737 size_t utf_ptradj(const char *) MKSH_A_PURE; 1738 #ifdef MIRBSD_BOOTFLOPPY 1739 #define utf_wcwidth(i) wcwidth((wchar_t)(i)) 1740 #else 1741 int utf_wcwidth(unsigned int) MKSH_A_PURE; 1742 #endif 1743 int ksh_access(const char *, int); 1744 struct tbl *tempvar(void); 1745 /* funcs.c */ 1746 int c_hash(const char **); 1747 int c_pwd(const char **); 1748 int c_print(const char **); 1749 #ifdef MKSH_PRINTF_BUILTIN 1750 int c_printf(const char **); 1751 #endif 1752 int c_whence(const char **); 1753 int c_command(const char **); 1754 int c_typeset(const char **); 1755 int c_alias(const char **); 1756 int c_unalias(const char **); 1757 int c_let(const char **); 1758 int c_jobs(const char **); 1759 #ifndef MKSH_UNEMPLOYED 1760 int c_fgbg(const char **); 1761 #endif 1762 int c_kill(const char **); 1763 void getopts_reset(int); 1764 int c_getopts(const char **); 1765 #ifndef MKSH_NO_CMDLINE_EDITING 1766 int c_bind(const char **); 1767 #endif 1768 int c_shift(const char **); 1769 int c_umask(const char **); 1770 int c_dot(const char **); 1771 int c_wait(const char **); 1772 int c_read(const char **); 1773 int c_eval(const char **); 1774 int c_trap(const char **); 1775 int c_brkcont(const char **); 1776 int c_exitreturn(const char **); 1777 int c_set(const char **); 1778 int c_unset(const char **); 1779 int c_ulimit(const char **); 1780 int c_times(const char **); 1781 int timex(struct op *, int, volatile int *); 1782 void timex_hook(struct op *, char ** volatile *); 1783 int c_exec(const char **); 1784 /* dummy function (just need pointer value), special case in comexec() */ 1785 #define c_builtin shcomexec 1786 int c_test(const char **); 1787 #if HAVE_MKNOD 1788 int c_mknod(const char **); 1789 #endif 1790 int c_realpath(const char **); 1791 int c_rename(const char **); 1792 int c_cat(const char **); 1793 int c_sleep(const char **); 1794 /* histrap.c */ 1795 void init_histvec(void); 1796 void hist_init(Source *); 1797 #if HAVE_PERSISTENT_HISTORY 1798 void hist_finish(void); 1799 #endif 1800 void histsave(int *, const char *, int, bool); 1801 #if !defined(MKSH_SMALL) && HAVE_PERSISTENT_HISTORY 1802 bool histsync(void); 1803 #endif 1804 int c_fc(const char **); 1805 void sethistsize(mksh_ari_t); 1806 #if HAVE_PERSISTENT_HISTORY 1807 void sethistfile(const char *); 1808 #endif 1809 #if !defined(MKSH_NO_CMDLINE_EDITING) && !MKSH_S_NOVI 1810 char **histpos(void) MKSH_A_PURE; 1811 int histnum(int); 1812 #endif 1813 int findhist(int, int, const char *, bool) MKSH_A_PURE; 1814 char **hist_get_newest(bool); 1815 void inittraps(void); 1816 void alarm_init(void); 1817 Trap *gettrap(const char *, bool, bool); 1818 void trapsig(int); 1819 void intrcheck(void); 1820 int fatal_trap_check(void); 1821 int trap_pending(void); 1822 void runtraps(int intr); 1823 void runtrap(Trap *, bool); 1824 void cleartraps(void); 1825 void restoresigs(void); 1826 void settrap(Trap *, const char *); 1827 int block_pipe(void); 1828 void restore_pipe(int); 1829 int setsig(Trap *, sig_t, int); 1830 void setexecsig(Trap *, int); 1831 #if HAVE_FLOCK || HAVE_LOCK_FCNTL 1832 void mksh_lockfd(int); 1833 void mksh_unlkfd(int); 1834 #endif 1835 /* jobs.c */ 1836 void j_init(void); 1837 void j_exit(void); 1838 #ifndef MKSH_UNEMPLOYED 1839 void j_change(void); 1840 #endif 1841 int exchild(struct op *, int, volatile int *, int); 1842 void startlast(void); 1843 int waitlast(void); 1844 int waitfor(const char *, int *); 1845 int j_kill(const char *, int); 1846 #ifndef MKSH_UNEMPLOYED 1847 int j_resume(const char *, int); 1848 #endif 1849 #if !defined(MKSH_UNEMPLOYED) && HAVE_GETSID 1850 void j_suspend(void); 1851 #endif 1852 int j_jobs(const char *, int, int); 1853 void j_notify(void); 1854 pid_t j_async(void); 1855 int j_stopped_running(void); 1856 /* lex.c */ 1857 int yylex(int); 1858 void yyskiputf8bom(void); 1859 void yyerror(const char *, ...) 1860 MKSH_A_NORETURN 1861 MKSH_A_FORMAT(__printf__, 1, 2); 1862 Source *pushs(int, Area *); 1863 void set_prompt(int, Source *); 1864 int pprompt(const char *, int); 1865 /* main.c */ 1866 int include(const char *, int, const char **, bool); 1867 int command(const char *, int); 1868 int shell(Source * volatile, volatile bool); 1869 /* argument MUST NOT be 0 */ 1870 void unwind(int) MKSH_A_NORETURN; 1871 void newenv(int); 1872 void quitenv(struct shf *); 1873 void cleanup_parents_env(void); 1874 void cleanup_proc_env(void); 1875 void errorf(const char *, ...) 1876 MKSH_A_NORETURN 1877 MKSH_A_FORMAT(__printf__, 1, 2); 1878 void errorfx(int, const char *, ...) 1879 MKSH_A_NORETURN 1880 MKSH_A_FORMAT(__printf__, 2, 3); 1881 void warningf(bool, const char *, ...) 1882 MKSH_A_FORMAT(__printf__, 2, 3); 1883 void bi_errorf(const char *, ...) 1884 MKSH_A_FORMAT(__printf__, 1, 2); 1885 #define errorfz() errorf(NULL) 1886 #define errorfxz(rc) errorfx((rc), NULL) 1887 #define bi_errorfz() bi_errorf(NULL) 1888 void internal_errorf(const char *, ...) 1889 MKSH_A_NORETURN 1890 MKSH_A_FORMAT(__printf__, 1, 2); 1891 void internal_warningf(const char *, ...) 1892 MKSH_A_FORMAT(__printf__, 1, 2); 1893 void error_prefix(bool); 1894 void shellf(const char *, ...) 1895 MKSH_A_FORMAT(__printf__, 1, 2); 1896 void shprintf(const char *, ...) 1897 MKSH_A_FORMAT(__printf__, 1, 2); 1898 int can_seek(int); 1899 void initio(void); 1900 int ksh_dup2(int, int, bool); 1901 short savefd(int); 1902 void restfd(int, int); 1903 void openpipe(int *); 1904 void closepipe(int *); 1905 int check_fd(const char *, int, const char **); 1906 void coproc_init(void); 1907 void coproc_read_close(int); 1908 void coproc_readw_close(int); 1909 void coproc_write_close(int); 1910 int coproc_getfd(int, const char **); 1911 void coproc_cleanup(int); 1912 struct temp *maketemp(Area *, Temp_type, struct temp **); 1913 void ktinit(Area *, struct table *, uint8_t); 1914 struct tbl *ktscan(struct table *, const char *, uint32_t, struct tbl ***); 1915 /* table, name (key) to search for, hash(n) */ 1916 #define ktsearch(tp, s, h) ktscan((tp), (s), (h), NULL) 1917 struct tbl *ktenter(struct table *, const char *, uint32_t); 1918 #define ktdelete(p) do { p->flag = 0; } while (/* CONSTCOND */ 0) 1919 void ktwalk(struct tstate *, struct table *); 1920 struct tbl *ktnext(struct tstate *); 1921 struct tbl **ktsort(struct table *); 1922 #ifdef DF 1923 void DF(const char *, ...) 1924 MKSH_A_FORMAT(__printf__, 1, 2); 1925 #endif 1926 /* misc.c */ 1927 void setctypes(const char *, int); 1928 void initctypes(void); 1929 size_t option(const char *) MKSH_A_PURE; 1930 char *getoptions(void); 1931 void change_flag(enum sh_flag, int, bool); 1932 void change_xtrace(unsigned char, bool); 1933 int parse_args(const char **, int, bool *); 1934 int getn(const char *, int *); 1935 int gmatchx(const char *, const char *, bool); 1936 int has_globbing(const char *, const char *) MKSH_A_PURE; 1937 int xstrcmp(const void *, const void *) MKSH_A_PURE; 1938 void ksh_getopt_reset(Getopt *, int); 1939 int ksh_getopt(const char **, Getopt *, const char *); 1940 void print_value_quoted(struct shf *, const char *); 1941 char *quote_value(const char *); 1942 void print_columns(struct shf *, unsigned int, 1943 void (*)(char *, size_t, unsigned int, const void *), 1944 const void *, size_t, size_t, bool); 1945 void strip_nuls(char *, size_t) 1946 MKSH_A_BOUNDED(__string__, 1, 2); 1947 ssize_t blocking_read(int, char *, size_t) 1948 MKSH_A_BOUNDED(__buffer__, 2, 3); 1949 int reset_nonblock(int); 1950 char *ksh_get_wd(void); 1951 char *do_realpath(const char *); 1952 void simplify_path(char *); 1953 void set_current_wd(const char *); 1954 int c_cd(const char **); 1955 #if defined(MKSH_SMALL) && !defined(MKSH_SMALL_BUT_FAST) 1956 char *strdup_i(const char *, Area *); 1957 char *strndup_i(const char *, size_t, Area *); 1958 #endif 1959 int unbksl(bool, int (*)(void), void (*)(int)); 1960 /* shf.c */ 1961 struct shf *shf_open(const char *, int, int, int); 1962 struct shf *shf_fdopen(int, int, struct shf *); 1963 struct shf *shf_reopen(int, int, struct shf *); 1964 struct shf *shf_sopen(char *, ssize_t, int, struct shf *); 1965 int shf_close(struct shf *); 1966 int shf_fdclose(struct shf *); 1967 char *shf_sclose(struct shf *); 1968 int shf_flush(struct shf *); 1969 ssize_t shf_read(char *, ssize_t, struct shf *); 1970 char *shf_getse(char *, ssize_t, struct shf *); 1971 int shf_getchar(struct shf *s); 1972 int shf_ungetc(int, struct shf *); 1973 #if defined(MKSH_SMALL) && !defined(MKSH_SMALL_BUT_FAST) 1974 int shf_getc(struct shf *); 1975 int shf_putc(int, struct shf *); 1976 #else 1977 #define shf_getc shf_getc_i 1978 #define shf_putc shf_putc_i 1979 #endif 1980 int shf_putchar(int, struct shf *); 1981 ssize_t shf_puts(const char *, struct shf *); 1982 ssize_t shf_write(const char *, ssize_t, struct shf *); 1983 ssize_t shf_fprintf(struct shf *, const char *, ...) 1984 MKSH_A_FORMAT(__printf__, 2, 3); 1985 ssize_t shf_snprintf(char *, ssize_t, const char *, ...) 1986 MKSH_A_FORMAT(__printf__, 3, 4) 1987 MKSH_A_BOUNDED(__string__, 1, 2); 1988 char *shf_smprintf(const char *, ...) 1989 MKSH_A_FORMAT(__printf__, 1, 2); 1990 ssize_t shf_vfprintf(struct shf *, const char *, va_list) 1991 MKSH_A_FORMAT(__printf__, 2, 0); 1992 /* syn.c */ 1993 int assign_command(const char *, bool); 1994 void initkeywords(void); 1995 struct op *compile(Source *, bool); 1996 bool parse_usec(const char *, struct timeval *); 1997 char *yyrecursive(int); 1998 void yyrecursive_pop(bool); 1999 /* tree.c */ 2000 void fptreef(struct shf *, int, const char *, ...); 2001 char *snptreef(char *, ssize_t, const char *, ...); 2002 struct op *tcopy(struct op *, Area *); 2003 char *wdcopy(const char *, Area *); 2004 const char *wdscan(const char *, int); 2005 #define WDS_TPUTS BIT(0) /* tputS (dumpwdvar) mode */ 2006 char *wdstrip(const char *, int); 2007 void tfree(struct op *, Area *); 2008 void dumpchar(struct shf *, int); 2009 void dumptree(struct shf *, struct op *); 2010 void dumpwdvar(struct shf *, const char *); 2011 void dumpioact(struct shf *shf, struct op *t); 2012 void vistree(char *, size_t, struct op *) 2013 MKSH_A_BOUNDED(__string__, 1, 2); 2014 void fpFUNCTf(struct shf *, int, bool, const char *, struct op *); 2015 /* var.c */ 2016 void newblock(void); 2017 void popblock(void); 2018 void initvar(void); 2019 struct block *varsearch(struct block *, struct tbl **, const char *, uint32_t); 2020 struct tbl *global(const char *); 2021 struct tbl *local(const char *, bool); 2022 char *str_val(struct tbl *); 2023 int setstr(struct tbl *, const char *, int); 2024 struct tbl *setint_v(struct tbl *, struct tbl *, bool); 2025 void setint(struct tbl *, mksh_ari_t); 2026 void setint_n(struct tbl *, mksh_ari_t, int); 2027 struct tbl *typeset(const char *, uint32_t, uint32_t, int, int); 2028 void unset(struct tbl *, int); 2029 const char *skip_varname(const char *, bool) MKSH_A_PURE; 2030 const char *skip_wdvarname(const char *, bool) MKSH_A_PURE; 2031 int is_wdvarname(const char *, bool) MKSH_A_PURE; 2032 int is_wdvarassign(const char *) MKSH_A_PURE; 2033 struct tbl *arraysearch(struct tbl *, uint32_t); 2034 char **makenv(void); 2035 void change_winsz(void); 2036 size_t array_ref_len(const char *) MKSH_A_PURE; 2037 char *arrayname(const char *); 2038 mksh_uari_t set_array(const char *, bool, const char **); 2039 uint32_t hash(const void *) MKSH_A_PURE; 2040 uint32_t chvt_rndsetup(const void *, size_t) MKSH_A_PURE; 2041 mksh_ari_t rndget(void); 2042 void rndset(unsigned long); 2043 void rndpush(const void *); 2044 2045 enum Test_op { 2046 /* non-operator */ 2047 TO_NONOP = 0, 2048 /* unary operators */ 2049 TO_STNZE, TO_STZER, TO_OPTION, 2050 TO_FILAXST, 2051 TO_FILEXST, 2052 TO_FILREG, TO_FILBDEV, TO_FILCDEV, TO_FILSYM, TO_FILFIFO, TO_FILSOCK, 2053 TO_FILCDF, TO_FILID, TO_FILGID, TO_FILSETG, TO_FILSTCK, TO_FILUID, 2054 TO_FILRD, TO_FILGZ, TO_FILTT, TO_FILSETU, TO_FILWR, TO_FILEX, 2055 /* binary operators */ 2056 TO_STEQL, TO_STNEQ, TO_STLT, TO_STGT, TO_INTEQ, TO_INTNE, TO_INTGT, 2057 TO_INTGE, TO_INTLT, TO_INTLE, TO_FILEQ, TO_FILNT, TO_FILOT, 2058 /* not an operator */ 2059 TO_NONNULL /* !TO_NONOP */ 2060 }; 2061 typedef enum Test_op Test_op; 2062 2063 /* Used by Test_env.isa() (order important - used to index *_tokens[] arrays) */ 2064 enum Test_meta { 2065 TM_OR, /* -o or || */ 2066 TM_AND, /* -a or && */ 2067 TM_NOT, /* ! */ 2068 TM_OPAREN, /* ( */ 2069 TM_CPAREN, /* ) */ 2070 TM_UNOP, /* unary operator */ 2071 TM_BINOP, /* binary operator */ 2072 TM_END /* end of input */ 2073 }; 2074 typedef enum Test_meta Test_meta; 2075 2076 #define TEF_ERROR BIT(0) /* set if we've hit an error */ 2077 #define TEF_DBRACKET BIT(1) /* set if [[ .. ]] test */ 2078 2079 typedef struct test_env { 2080 union { 2081 const char **wp; /* used by ptest_* */ 2082 XPtrV *av; /* used by dbtestp_* */ 2083 } pos; 2084 const char **wp_end; /* used by ptest_* */ 2085 Test_op (*isa)(struct test_env *, Test_meta); 2086 const char *(*getopnd) (struct test_env *, Test_op, bool); 2087 int (*eval)(struct test_env *, Test_op, const char *, const char *, bool); 2088 void (*error)(struct test_env *, int, const char *); 2089 int flags; /* TEF_* */ 2090 } Test_env; 2091 2092 extern const char * const dbtest_tokens[]; 2093 2094 Test_op test_isop(Test_meta, const char *) MKSH_A_PURE; 2095 int test_eval(Test_env *, Test_op, const char *, const char *, bool); 2096 int test_parse(Test_env *); 2097 2098 /* tty_fd is not opened O_BINARY, it's thus never read/written */ 2099 EXTERN int tty_fd E_INIT(-1); /* dup'd tty file descriptor */ 2100 EXTERN bool tty_devtty; /* true if tty_fd is from /dev/tty */ 2101 EXTERN mksh_ttyst tty_state; /* saved tty state */ 2102 EXTERN bool tty_hasstate; /* true if tty_state is valid */ 2103 2104 extern int tty_init_fd(void); /* initialise tty_fd, tty_devtty */ 2105 2106 #ifdef __OS2__ 2107 #ifndef __GNUC__ 2108 # error oops? 2109 #endif 2110 #define binopen2(path,flags) __extension__({ \ 2111 int binopen2_fd = open((path), (flags) | O_BINARY); \ 2112 if (binopen2_fd >= 0) \ 2113 setmode(binopen2_fd, O_BINARY); \ 2114 (binopen2_fd); \ 2115 }) 2116 #define binopen3(path,flags,mode) __extension__({ \ 2117 int binopen3_fd = open((path), (flags) | O_BINARY, (mode)); \ 2118 if (binopen3_fd >= 0) \ 2119 setmode(binopen3_fd, O_BINARY); \ 2120 (binopen3_fd); \ 2121 }) 2122 #define mksh_abspath(s) __extension__({ \ 2123 const char *mksh_abspath_s = (s); \ 2124 (mksh_abspath_s[0] == '/' || (ksh_isalphx(mksh_abspath_s[0]) && \ 2125 mksh_abspath_s[1] == ':')); \ 2126 }) 2127 #else 2128 #define binopen2(path,flags) open((path), (flags) | O_BINARY) 2129 #define binopen3(path,flags,mode) open((path), (flags) | O_BINARY, (mode)) 2130 #define mksh_abspath(s) ((s)[0] == '/') 2131 #endif 2132 2133 /* be sure not to interfere with anyone else's idea about EXTERN */ 2134 #ifdef EXTERN_DEFINED 2135 # undef EXTERN_DEFINED 2136 # undef EXTERN 2137 #endif 2138 #undef E_INIT 2139 2140 #endif /* !MKSH_INCLUDES_ONLY */ 2141
