1 /* $OpenBSD: sh.h,v 1.33 2013/12/18 13:53:12 millert 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 1.6 2005/03/30 17:16:37 deraadt 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
14 * Thorsten Glaser <tg@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 person’s 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_LIBGEN_H
68 #include <libgen.h>
69 #endif
70 #if HAVE_LIBUTIL_H
71 #include <libutil.h>
72 #endif
73 #include <limits.h>
74 #if HAVE_PATHS_H
75 #include <paths.h>
76 #endif
77 #include <pwd.h>
78 #include <setjmp.h>
79 #include <signal.h>
80 #include <stdarg.h>
81 #include <stddef.h>
82 #if HAVE_STDINT_H
83 #include <stdint.h>
84 #endif
85 #include <stdio.h>
86 #include <stdlib.h>
87 #include <string.h>
88 #if HAVE_STRINGS_H
89 #include <strings.h>
90 #endif
91 #if HAVE_TERMIOS_H
92 #include <termios.h>
93 #else
94 /* shudder… */
95 #include <termio.h>
96 #endif
97 #ifdef _ISC_UNIX
98 /* XXX imake style */
99 #include <sys/sioctl.h>
100 #endif
101 #if HAVE_ULIMIT_H
102 #include <ulimit.h>
103 #endif
104 #include <unistd.h>
105 #if HAVE_VALUES_H
106 #include <values.h>
107 #endif
108
109 #undef __attribute__
110 #if HAVE_ATTRIBUTE_BOUNDED
111 #define MKSH_A_BOUNDED(x,y,z) __attribute__((__bounded__(x, y, z)))
112 #else
113 #define MKSH_A_BOUNDED(x,y,z) /* nothing */
114 #endif
115 #if HAVE_ATTRIBUTE_FORMAT
116 #define MKSH_A_FORMAT(x,y,z) __attribute__((__format__(x, y, z)))
117 #else
118 #define MKSH_A_FORMAT(x,y,z) /* nothing */
119 #endif
120 #if HAVE_ATTRIBUTE_NORETURN
121 #define MKSH_A_NORETURN __attribute__((__noreturn__))
122 #else
123 #define MKSH_A_NORETURN /* nothing */
124 #endif
125 #if HAVE_ATTRIBUTE_PURE
126 #define MKSH_A_PURE __attribute__((__pure__))
127 #else
128 #define MKSH_A_PURE /* nothing */
129 #endif
130 #if HAVE_ATTRIBUTE_UNUSED
131 #define MKSH_A_UNUSED __attribute__((__unused__))
132 #else
133 #define MKSH_A_UNUSED /* nothing */
134 #endif
135 #if HAVE_ATTRIBUTE_USED
136 #define MKSH_A_USED __attribute__((__used__))
137 #else
138 #define MKSH_A_USED /* nothing */
139 #endif
140
141 #if defined(MirBSD) && (MirBSD >= 0x09A1) && \
142 defined(__ELF__) && defined(__GNUC__) && \
143 !defined(__llvm__) && !defined(__NWCC__)
144 /*
145 * We got usable __IDSTRING __COPYRIGHT __RCSID __SCCSID macros
146 * which work for all cases; no need to redefine them using the
147 * "portable" macros from below when we might have the "better"
148 * gcc+ELF specific macros or other system dependent ones.
149 */
150 #else
151 #undef __IDSTRING
152 #undef __IDSTRING_CONCAT
153 #undef __IDSTRING_EXPAND
154 #undef __COPYRIGHT
155 #undef __RCSID
156 #undef __SCCSID
157 #define __IDSTRING_CONCAT(l,p) __LINTED__ ## l ## _ ## p
158 #define __IDSTRING_EXPAND(l,p) __IDSTRING_CONCAT(l,p)
159 #ifdef MKSH_DONT_EMIT_IDSTRING
160 #define __IDSTRING(prefix, string) /* nothing */
161 #else
162 #define __IDSTRING(prefix, string) \
163 static const char __IDSTRING_EXPAND(__LINE__,prefix) [] \
164 MKSH_A_USED = "@(""#)" #prefix ": " string
165 #endif
166 #define __COPYRIGHT(x) __IDSTRING(copyright,x)
167 #define __RCSID(x) __IDSTRING(rcsid,x)
168 #define __SCCSID(x) __IDSTRING(sccsid,x)
169 #endif
170
171 #ifdef EXTERN
172 __RCSID("$MirOS: src/bin/mksh/sh.h,v 1.697 2014/10/07 15:22:17 tg Exp $");
173 #endif
174 #define MKSH_VERSION "R50 2014/10/07"
175
176 /* arithmetic types: C implementation */
177 #if !HAVE_CAN_INTTYPES
178 #if !HAVE_CAN_UCBINTS
179 typedef signed int int32_t;
180 typedef unsigned int uint32_t;
181 #else
182 typedef u_int32_t uint32_t;
183 #endif
184 #endif
185
186 /* arithmetic types: shell arithmetics */
187 #ifdef MKSH_LEGACY_MODE
188 /*
189 * POSIX demands these to be the C environment's long type
190 */
191 typedef long mksh_ari_t;
192 typedef unsigned long mksh_uari_t;
193 #else
194 /*
195 * These types are exactly 32 bit wide; signed and unsigned
196 * integer wraparound, even across division and modulo, for
197 * any shell code using them, is guaranteed.
198 */
199 typedef int32_t mksh_ari_t;
200 typedef uint32_t mksh_uari_t;
201 #endif
202
203 /* boolean type (no <stdbool.h> deliberately) */
204 typedef unsigned char mksh_bool;
205 #undef bool
206 /* false MUST equal the same 0 as written by static storage initialisation */
207 #undef false
208 #undef true
209 /* access macros for boolean type */
210 #define bool mksh_bool
211 /* values must have identity mapping between mksh_bool and short */
212 #define false 0
213 #define true 1
214 /* make any-type into bool or short */
215 #define tobool(cond) ((cond) ? true : false)
216
217 /* char (octet) type: C implementation */
218 #if !HAVE_CAN_INT8TYPE
219 #if !HAVE_CAN_UCBINT8
220 typedef unsigned char uint8_t;
221 #else
222 typedef u_int8_t uint8_t;
223 #endif
224 #endif
225
226 /* other standard types */
227
228 #if !HAVE_RLIM_T
229 typedef unsigned long rlim_t;
230 #endif
231
232 #if !HAVE_SIG_T
233 #undef sig_t
234 typedef void (*sig_t)(int);
235 #endif
236
237 #ifdef MKSH_TYPEDEF_SIG_ATOMIC_T
238 typedef MKSH_TYPEDEF_SIG_ATOMIC_T sig_atomic_t;
239 #endif
240
241 #ifdef MKSH_TYPEDEF_SSIZE_T
242 typedef MKSH_TYPEDEF_SSIZE_T ssize_t;
243 #endif
244
245 /* un-do vendor damage */
246
247 #undef BAD /* AIX defines that somewhere */
248 #undef PRINT /* LynxOS defines that somewhere */
249 #undef flock /* SCO UnixWare defines that to flock64 but ENOENT */
250
251
252 #ifndef MKSH_INCLUDES_ONLY
253
254 /* extra types */
255
256 #if !HAVE_GETRUSAGE
257 #undef rusage
258 #undef RUSAGE_SELF
259 #undef RUSAGE_CHILDREN
260 #define rusage mksh_rusage
261 #define RUSAGE_SELF 0
262 #define RUSAGE_CHILDREN -1
263
264 struct rusage {
265 struct timeval ru_utime;
266 struct timeval ru_stime;
267 };
268 #endif
269
270 /* extra macros */
271
272 #ifndef timerclear
273 #define timerclear(tvp) \
274 do { \
275 (tvp)->tv_sec = (tvp)->tv_usec = 0; \
276 } while (/* CONSTCOND */ 0)
277 #endif
278 #ifndef timeradd
279 #define timeradd(tvp, uvp, vvp) \
280 do { \
281 (vvp)->tv_sec = (tvp)->tv_sec + (uvp)->tv_sec; \
282 (vvp)->tv_usec = (tvp)->tv_usec + (uvp)->tv_usec; \
283 if ((vvp)->tv_usec >= 1000000) { \
284 (vvp)->tv_sec++; \
285 (vvp)->tv_usec -= 1000000; \
286 } \
287 } while (/* CONSTCOND */ 0)
288 #endif
289 #ifndef timersub
290 #define timersub(tvp, uvp, vvp) \
291 do { \
292 (vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec; \
293 (vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec; \
294 if ((vvp)->tv_usec < 0) { \
295 (vvp)->tv_sec--; \
296 (vvp)->tv_usec += 1000000; \
297 } \
298 } while (/* CONSTCOND */ 0)
299 #endif
300
301 #define ksh_isdigit(c) (((c) >= '0') && ((c) <= '9'))
302 #define ksh_islower(c) (((c) >= 'a') && ((c) <= 'z'))
303 #define ksh_isupper(c) (((c) >= 'A') && ((c) <= 'Z'))
304 #define ksh_tolower(c) (((c) >= 'A') && ((c) <= 'Z') ? (c) - 'A' + 'a' : (c))
305 #define ksh_toupper(c) (((c) >= 'a') && ((c) <= 'z') ? (c) - 'a' + 'A' : (c))
306 #define ksh_isdash(s) (((s)[0] == '-') && ((s)[1] == '\0'))
307 #define ksh_isspace(c) ((((c) >= 0x09) && ((c) <= 0x0D)) || ((c) == 0x20))
308 #define ksh_min(x,y) ((x) < (y) ? (x) : (y))
309 #define ksh_max(x,y) ((x) > (y) ? (x) : (y))
310
311 #ifdef MKSH__NO_PATH_MAX
312 #undef PATH_MAX
313 #else
314 #ifndef PATH_MAX
315 #define PATH_MAX 1024
316 #endif
317 #endif
318 #ifndef SIZE_MAX
319 #ifdef SIZE_T_MAX
320 #define SIZE_MAX SIZE_T_MAX
321 #else
322 #define SIZE_MAX ((size_t)-1)
323 #endif
324 #endif
325 #ifndef S_ISLNK
326 #define S_ISLNK(m) ((m & 0170000) == 0120000)
327 #endif
328 #ifndef S_ISSOCK
329 #define S_ISSOCK(m) ((m & 0170000) == 0140000)
330 #endif
331 #if !defined(S_ISCDF) && defined(S_CDF)
332 #define S_ISCDF(m) (S_ISDIR(m) && ((m) & S_CDF))
333 #endif
334 #ifndef DEFFILEMODE
335 #define DEFFILEMODE (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
336 #endif
337
338 #ifndef NSIG
339 #if defined(_NSIG)
340 #define NSIG _NSIG
341 #elif defined(SIGMAX)
342 #define NSIG (SIGMAX+1)
343 #elif defined(_SIGMAX)
344 #define NSIG (_SIGMAX+1)
345 #else
346 # error Please have your platform define NSIG.
347 #define NSIG 64
348 #endif
349 #endif
350
351 /* get rid of this (and awk/printf(1) in Build.sh) later */
352 #if (NSIG < 1)
353 # error Your NSIG value is not positive.
354 #unset NSIG
355 #define NSIG 64
356 #endif
357
358
359 /* OS-dependent additions (functions, variables, by OS) */
360
361 #if !HAVE_FLOCK_DECL
362 extern int flock(int, int);
363 #endif
364
365 #if !HAVE_GETTIMEOFDAY
366 #define mksh_TIME(tv) do { \
367 (tv).tv_usec = 0; \
368 (tv).tv_sec = time(NULL); \
369 } while (/* CONSTCOND */ 0)
370 #else
371 #define mksh_TIME(tv) gettimeofday(&(tv), NULL)
372 #endif
373
374 #if !HAVE_GETRUSAGE
375 extern int getrusage(int, struct rusage *);
376 #endif
377
378 #if !HAVE_MEMMOVE
379 /* we assume either memmove or bcopy exist, at the moment */
380 #define memmove(dst, src, len) bcopy((src), (dst), (len))
381 #endif
382
383 #if !HAVE_REVOKE_DECL
384 extern int revoke(const char *);
385 #endif
386
387 #if defined(DEBUG) || !HAVE_STRERROR
388 #undef strerror
389 #define strerror /* poisoned */ dontuse_strerror
390 #define cstrerror /* replaced */ cstrerror
391 extern const char *cstrerror(int);
392 #else
393 #define cstrerror(errnum) ((const char *)strerror(errnum))
394 #endif
395
396 #if !HAVE_STRLCPY
397 size_t strlcpy(char *, const char *, size_t);
398 #endif
399
400 #ifdef __INTERIX
401 /* XXX imake style */
402 #define makedev mkdev
403 extern int __cdecl seteuid(uid_t);
404 extern int __cdecl setegid(gid_t);
405 #endif
406
407 #if defined(__COHERENT__)
408 #ifndef O_ACCMODE
409 /* this need not work everywhere, take care */
410 #define O_ACCMODE (O_RDONLY | O_WRONLY | O_RDWR)
411 #endif
412 #endif
413
414 #ifndef O_BINARY
415 #define O_BINARY 0
416 #endif
417
418 #ifdef MKSH__NO_SYMLINK
419 #undef S_ISLNK
420 #define S_ISLNK(m) (/* CONSTCOND */ 0)
421 #define mksh_lstat stat
422 #else
423 #define mksh_lstat lstat
424 #endif
425
426 #if HAVE_TERMIOS_H
427 #define mksh_ttyst struct termios
428 #define mksh_tcget(fd,st) tcgetattr((fd), (st))
429 #define mksh_tcset(fd,st) tcsetattr((fd), TCSADRAIN, (st))
430 #else
431 #define mksh_ttyst struct termio
432 #define mksh_tcget(fd,st) ioctl((fd), TCGETA, (st))
433 #define mksh_tcset(fd,st) ioctl((fd), TCSETAW, (st))
434 #endif
435
436 #ifndef ISTRIP
437 #define ISTRIP 0
438 #endif
439
440
441 /* some useful #defines */
442 #ifdef EXTERN
443 # define E_INIT(i) = i
444 #else
445 # define E_INIT(i)
446 # define EXTERN extern
447 # define EXTERN_DEFINED
448 #endif
449
450 /* define bit in flag */
451 #define BIT(i) (1 << (i))
452 #define NELEM(a) (sizeof(a) / sizeof((a)[0]))
453
454 /*
455 * Make MAGIC a char that might be printed to make bugs more obvious, but
456 * not a char that is used often. Also, can't use the high bit as it causes
457 * portability problems (calling strchr(x, 0x80 | 'x') is error prone).
458 */
459 #define MAGIC (7) /* prefix for *?[!{,} during expand */
460 #define ISMAGIC(c) ((unsigned char)(c) == MAGIC)
461
462 EXTERN const char *safe_prompt; /* safe prompt if PS1 substitution fails */
463
464 #ifdef MKSH_LEGACY_MODE
465 #define KSH_VERSIONNAME "LEGACY"
466 #else
467 #define KSH_VERSIONNAME "MIRBSD"
468 #endif
469 EXTERN const char initvsn[] E_INIT("KSH_VERSION=@(#)" KSH_VERSIONNAME \
470 " KSH " MKSH_VERSION);
471 #define KSH_VERSION (initvsn + /* "KSH_VERSION=@(#)" */ 16)
472
473 EXTERN const char digits_uc[] E_INIT("0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ");
474 EXTERN const char digits_lc[] E_INIT("0123456789abcdefghijklmnopqrstuvwxyz");
475
476 /*
477 * Evil hack for const correctness due to API brokenness
478 */
479 union mksh_cchack {
480 char *rw;
481 const char *ro;
482 };
483 union mksh_ccphack {
484 char **rw;
485 const char **ro;
486 };
487
488 /*
489 * Evil hack since casting uint to sint is implementation-defined
490 */
491 typedef union {
492 mksh_ari_t i;
493 mksh_uari_t u;
494 } mksh_ari_u;
495
496 /* for const debugging */
497 #if defined(DEBUG) && defined(__GNUC__) && !defined(__ICC) && \
498 !defined(__INTEL_COMPILER) && !defined(__SUNPRO_C)
499 char *ucstrchr(char *, int);
500 char *ucstrstr(char *, const char *);
501 #undef strchr
502 #define strchr ucstrchr
503 #define strstr ucstrstr
504 #define cstrchr(s,c) ({ \
505 union mksh_cchack in, out; \
506 \
507 in.ro = (s); \
508 out.rw = ucstrchr(in.rw, (c)); \
509 (out.ro); \
510 })
511 #define cstrstr(b,l) ({ \
512 union mksh_cchack in, out; \
513 \
514 in.ro = (b); \
515 out.rw = ucstrstr(in.rw, (l)); \
516 (out.ro); \
517 })
518 #define vstrchr(s,c) (cstrchr((s), (c)) != NULL)
519 #define vstrstr(b,l) (cstrstr((b), (l)) != NULL)
520 #else /* !DEBUG, !gcc */
521 #define cstrchr(s,c) ((const char *)strchr((s), (c)))
522 #define cstrstr(s,c) ((const char *)strstr((s), (c)))
523 #define vstrchr(s,c) (strchr((s), (c)) != NULL)
524 #define vstrstr(b,l) (strstr((b), (l)) != NULL)
525 #endif
526
527 #if defined(DEBUG) || defined(__COVERITY__)
528 #define mkssert(e) do { if (!(e)) exit(255); } while (/* CONSTCOND */ 0)
529 #ifndef DEBUG_LEAKS
530 #define DEBUG_LEAKS
531 #endif
532 #else
533 #define mkssert(e) do { } while (/* CONSTCOND */ 0)
534 #endif
535
536 #if (!defined(MKSH_BUILDMAKEFILE4BSD) && !defined(MKSH_BUILDSH)) || (MKSH_BUILD_R != 504)
537 #error Must run Build.sh to compile this.
538 extern void thiswillneverbedefinedIhope(void);
539 int
im_sorry_dave(void)540 im_sorry_dave(void)
541 {
542 /* I’m sorry, Dave. I’m afraid I can’t do that. */
543 return (thiswillneverbedefinedIhope());
544 }
545 #endif
546
547 /* use this ipv strchr(s, 0) but no side effects in s! */
548 #define strnul(s) ((s) + strlen(s))
549
550 #define utf_ptradjx(src, dst) do { \
551 (dst) = (src) + utf_ptradj(src); \
552 } while (/* CONSTCOND */ 0)
553
554 #if defined(MKSH_SMALL) && !defined(MKSH_SMALL_BUT_FAST)
555 #define strdupx(d, s, ap) do { \
556 (d) = strdup_i((s), (ap)); \
557 } while (/* CONSTCOND */ 0)
558 #define strndupx(d, s, n, ap) do { \
559 (d) = strndup_i((s), (n), (ap)); \
560 } while (/* CONSTCOND */ 0)
561 #else
562 /* be careful to evaluate arguments only once! */
563 #define strdupx(d, s, ap) do { \
564 const char *strdup_src = (s); \
565 char *strdup_dst = NULL; \
566 \
567 if (strdup_src != NULL) { \
568 size_t strdup_len = strlen(strdup_src) + 1; \
569 strdup_dst = alloc(strdup_len, (ap)); \
570 memcpy(strdup_dst, strdup_src, strdup_len); \
571 } \
572 (d) = strdup_dst; \
573 } while (/* CONSTCOND */ 0)
574 #define strndupx(d, s, n, ap) do { \
575 const char *strdup_src = (s); \
576 char *strdup_dst = NULL; \
577 \
578 if (strdup_src != NULL) { \
579 size_t strndup_len = (n); \
580 strdup_dst = alloc(strndup_len + 1, (ap)); \
581 memcpy(strdup_dst, strdup_src, strndup_len); \
582 strdup_dst[strndup_len] = '\0'; \
583 } \
584 (d) = strdup_dst; \
585 } while (/* CONSTCOND */ 0)
586 #endif
587
588 #ifdef MKSH_LEGACY_MODE
589 #ifndef MKSH_NO_CMDLINE_EDITING
590 #define MKSH_NO_CMDLINE_EDITING /* defined */
591 #endif
592 #ifndef MKSH_CONSERVATIVE_FDS
593 #define MKSH_CONSERVATIVE_FDS /* defined */
594 #endif
595 #undef MKSH_S_NOVI
596 #define MKSH_S_NOVI 1
597 #endif
598
599 #ifdef MKSH_SMALL
600 #ifndef MKSH_CONSERVATIVE_FDS
601 #define MKSH_CONSERVATIVE_FDS /* defined */
602 #endif
603 #ifndef MKSH_NOPWNAM
604 #define MKSH_NOPWNAM /* defined */
605 #endif
606 #ifndef MKSH_S_NOVI
607 #define MKSH_S_NOVI 1
608 #endif
609 #endif
610
611 #ifndef MKSH_S_NOVI
612 #define MKSH_S_NOVI 0
613 #endif
614
615 #if defined(MKSH_NOPROSPECTOFWORK) && !defined(MKSH_UNEMPLOYED)
616 #define MKSH_UNEMPLOYED 1
617 #endif
618
619 /* these shall be smaller than 100 */
620 #ifdef MKSH_CONSERVATIVE_FDS
621 #define NUFILE 32 /* Number of user-accessible files */
622 #define FDBASE 10 /* First file usable by Shell */
623 #else
624 #define NUFILE 56 /* Number of user-accessible files */
625 #define FDBASE 24 /* First file usable by Shell */
626 #endif
627
628 /*
629 * simple grouping allocator
630 */
631
632
633 /* 0. OS API: where to get memory from and how to free it (grouped) */
634
635 /* malloc(3)/realloc(3) -> free(3) for use by the memory allocator */
636 #define malloc_osi(sz) malloc(sz)
637 #define realloc_osi(p,sz) realloc((p), (sz))
638 #define free_osimalloc(p) free(p)
639
640 /* malloc(3)/realloc(3) -> free(3) for use by mksh code */
641 #define malloc_osfunc(sz) malloc(sz)
642 #define realloc_osfunc(p,sz) realloc((p), (sz))
643 #define free_osfunc(p) free(p)
644
645 #if HAVE_MKNOD
646 /* setmode(3) -> free(3) */
647 #define free_ossetmode(p) free(p)
648 #endif
649
650 #ifdef MKSH__NO_PATH_MAX
651 /* GNU libc: get_current_dir_name(3) -> free(3) */
652 #define free_gnu_gcdn(p) free(p)
653 #endif
654
655
656 /* 1. internal structure */
657 struct lalloc {
658 struct lalloc *next;
659 };
660
661 /* 2. sizes */
662 #define ALLOC_ITEM struct lalloc
663 #define ALLOC_SIZE (sizeof(ALLOC_ITEM))
664
665 /* 3. group structure (only the same for lalloc.c) */
666 typedef struct lalloc Area;
667
668
669 EXTERN Area aperm; /* permanent object space */
670 #define APERM &aperm
671 #define ATEMP &e->area
672
673 /*
674 * flags (the order of these enums MUST match the order in misc.c(options[]))
675 */
676 enum sh_flag {
677 #define SHFLAGS_ENUMS
678 #include "sh_flags.gen"
679 FNFLAGS /* (place holder: how many flags are there) */
680 };
681
682 #define Flag(f) (shell_flags[(int)(f)])
683 #define UTFMODE Flag(FUNICODE)
684
685 /*
686 * parsing & execution environment
687 *
688 * note that kshlongjmp MUST NOT be passed 0 as second argument!
689 */
690 #ifdef MKSH_NO_SIGSETJMP
691 #define kshjmp_buf jmp_buf
692 #define kshsetjmp(jbuf) _setjmp(jbuf)
693 #define kshlongjmp _longjmp
694 #else
695 #define kshjmp_buf sigjmp_buf
696 #define kshsetjmp(jbuf) sigsetjmp((jbuf), 0)
697 #define kshlongjmp siglongjmp
698 #endif
699
700 struct sretrace_info;
701 struct yyrecursive_state;
702
703 EXTERN struct sretrace_info *retrace_info E_INIT(NULL);
704 EXTERN int subshell_nesting_type E_INIT(0);
705
706 extern struct env {
707 ALLOC_ITEM alloc_INT; /* internal, do not touch */
708 Area area; /* temporary allocation area */
709 struct env *oenv; /* link to previous environment */
710 struct block *loc; /* local variables and functions */
711 short *savefd; /* original redirected fds */
712 struct temp *temps; /* temp files */
713 /* saved parser recursion state */
714 struct yyrecursive_state *yyrecursive_statep;
715 kshjmp_buf jbuf; /* long jump back to env creator */
716 uint8_t type; /* environment type - see below */
717 uint8_t flags; /* EF_* */
718 } *e;
719
720 /* struct env.type values */
721 #define E_NONE 0 /* dummy environment */
722 #define E_PARSE 1 /* parsing command # */
723 #define E_FUNC 2 /* executing function # */
724 #define E_INCL 3 /* including a file via . # */
725 #define E_EXEC 4 /* executing command tree */
726 #define E_LOOP 5 /* executing for/while # */
727 #define E_ERRH 6 /* general error handler # */
728 #define E_GONE 7 /* hidden in child */
729 /* # indicates env has valid jbuf (see unwind()) */
730
731 /* struct env.flag values */
732 #define EF_BRKCONT_PASS BIT(1) /* set if E_LOOP must pass break/continue on */
733 #define EF_FAKE_SIGDIE BIT(2) /* hack to get info from unwind to quitenv */
734
735 /* Do breaks/continues stop at env type e? */
736 #define STOP_BRKCONT(t) ((t) == E_NONE || (t) == E_PARSE || \
737 (t) == E_FUNC || (t) == E_INCL)
738 /* Do returns stop at env type e? */
739 #define STOP_RETURN(t) ((t) == E_FUNC || (t) == E_INCL)
740
741 /* values for kshlongjmp(e->jbuf, i) */
742 /* note that i MUST NOT be zero */
743 #define LRETURN 1 /* return statement */
744 #define LEXIT 2 /* exit statement */
745 #define LERROR 3 /* errorf() called */
746 #define LLEAVE 4 /* untrappable exit/error */
747 #define LINTR 5 /* ^C noticed */
748 #define LBREAK 6 /* break statement */
749 #define LCONTIN 7 /* continue statement */
750 #define LSHELL 8 /* return to interactive shell() */
751 #define LAEXPR 9 /* error in arithmetic expression */
752
753 /* sort of shell global state */
754 EXTERN pid_t procpid; /* PID of executing process */
755 EXTERN int exstat; /* exit status */
756 EXTERN int subst_exstat; /* exit status of last $(..)/`..` */
757 EXTERN struct tbl *vp_pipest; /* global PIPESTATUS array */
758 EXTERN short trap_exstat; /* exit status before running a trap */
759 EXTERN uint8_t trap_nested; /* running nested traps */
760 EXTERN uint8_t shell_flags[FNFLAGS];
761 EXTERN const char *kshname; /* $0 */
762 EXTERN struct {
763 uid_t kshuid_v; /* real UID of shell */
764 uid_t ksheuid_v; /* effective UID of shell */
765 gid_t kshgid_v; /* real GID of shell */
766 gid_t kshegid_v; /* effective GID of shell */
767 pid_t kshpgrp_v; /* process group of shell */
768 pid_t kshppid_v; /* PID of parent of shell */
769 pid_t kshpid_v; /* $$, shell PID */
770 } rndsetupstate;
771
772 #define kshpid rndsetupstate.kshpid_v
773 #define kshpgrp rndsetupstate.kshpgrp_v
774 #define kshuid rndsetupstate.kshuid_v
775 #define ksheuid rndsetupstate.ksheuid_v
776 #define kshgid rndsetupstate.kshgid_v
777 #define kshegid rndsetupstate.kshegid_v
778 #define kshppid rndsetupstate.kshppid_v
779
780
781 /* option processing */
782 #define OF_CMDLINE 0x01 /* command line */
783 #define OF_SET 0x02 /* set builtin */
784 #define OF_SPECIAL 0x04 /* a special variable changing */
785 #define OF_INTERNAL 0x08 /* set internally by shell */
786 #define OF_FIRSTTIME 0x10 /* as early as possible, once */
787 #define OF_ANY (OF_CMDLINE | OF_SET | OF_SPECIAL | OF_INTERNAL)
788
789 /* null value for variable; comparison pointer for unset */
790 EXTERN char null[] E_INIT("");
791 /* helpers for string pooling */
792 EXTERN const char Tintovfl[] E_INIT("integer overflow %zu %c %zu prevented");
793 EXTERN const char Toomem[] E_INIT("can't allocate %zu data bytes");
794 #if defined(__GNUC__)
795 /* trust this to have string pooling; -Wformat bitches otherwise */
796 #define Tsynerr "syntax error"
797 #else
798 EXTERN const char Tsynerr[] E_INIT("syntax error");
799 #endif
800 EXTERN const char Tselect[] E_INIT("select");
801 EXTERN const char Tr_fc_e_dash[] E_INIT("r=fc -e -");
802 #define Tfc_e_dash (Tr_fc_e_dash + 2) /* "fc -e -" */
803 #define Zfc_e_dash 7 /* strlen(Tfc_e_dash) */
804 EXTERN const char Tlocal_typeset[] E_INIT("local=typeset");
805 #define T_typeset (Tlocal_typeset + 5) /* "=typeset" */
806 #define Ttypeset (Tlocal_typeset + 6) /* "typeset" */
807 EXTERN const char Talias[] E_INIT("alias");
808 EXTERN const char Tunalias[] E_INIT("unalias");
809 EXTERN const char Tsgset[] E_INIT("*=set");
810 #define Tset (Tsgset + 2) /* "set" */
811 EXTERN const char Tsgunset[] E_INIT("*=unset");
812 #define Tunset (Tsgunset + 2) /* "unset" */
813 EXTERN const char Tsgexport[] E_INIT("*=export");
814 #define Texport (Tsgexport + 2) /* "export" */
815 EXTERN const char Tsgreadonly[] E_INIT("*=readonly");
816 #define Treadonly (Tsgreadonly + 2) /* "readonly" */
817 EXTERN const char Tgbuiltin[] E_INIT("=builtin");
818 #define Tbuiltin (Tgbuiltin + 1) /* "builtin" */
819 EXTERN const char T_function[] E_INIT(" function");
820 #define Tfunction (T_function + 1) /* "function" */
821 EXTERN const char TC_LEX1[] E_INIT("|&;<>() \t\n");
822 #define TC_IFSWS (TC_LEX1 + 7) /* space tab newline */
823
824 typedef uint8_t Temp_type;
825 /* expanded heredoc */
826 #define TT_HEREDOC_EXP 0
827 /* temporary file used for history editing (fc -e) */
828 #define TT_HIST_EDIT 1
829 /* temporary file used during in-situ command substitution */
830 #define TT_FUNSUB 2
831
832 /* temp/heredoc files. The file is removed when the struct is freed. */
833 struct temp {
834 struct temp *next;
835 struct shf *shf;
836 /* pid of process parsed here-doc */
837 pid_t pid;
838 Temp_type type;
839 /* actually longer: name (variable length) */
840 char tffn[3];
841 };
842
843 /*
844 * stdio and our IO routines
845 */
846
847 #define shl_xtrace (&shf_iob[0]) /* for set -x */
848 #define shl_stdout (&shf_iob[1])
849 #define shl_out (&shf_iob[2])
850 #ifdef DF
851 #define shl_dbg (&shf_iob[3]) /* for DF() */
852 #endif
853 EXTERN bool shl_stdout_ok;
854
855 /*
856 * trap handlers
857 */
858 typedef struct trap {
859 const char *name; /* short name */
860 const char *mess; /* descriptive name */
861 char *trap; /* trap command */
862 sig_t cursig; /* current handler (valid if TF_ORIG_* set) */
863 sig_t shtrap; /* shell signal handler */
864 int signal; /* signal number */
865 int flags; /* TF_* */
866 volatile sig_atomic_t set; /* trap pending */
867 } Trap;
868
869 /* values for Trap.flags */
870 #define TF_SHELL_USES BIT(0) /* shell uses signal, user can't change */
871 #define TF_USER_SET BIT(1) /* user has (tried to) set trap */
872 #define TF_ORIG_IGN BIT(2) /* original action was SIG_IGN */
873 #define TF_ORIG_DFL BIT(3) /* original action was SIG_DFL */
874 #define TF_EXEC_IGN BIT(4) /* restore SIG_IGN just before exec */
875 #define TF_EXEC_DFL BIT(5) /* restore SIG_DFL just before exec */
876 #define TF_DFL_INTR BIT(6) /* when received, default action is LINTR */
877 #define TF_TTY_INTR BIT(7) /* tty generated signal (see j_waitj) */
878 #define TF_CHANGED BIT(8) /* used by runtrap() to detect trap changes */
879 #define TF_FATAL BIT(9) /* causes termination if not trapped */
880
881 /* values for setsig()/setexecsig() flags argument */
882 #define SS_RESTORE_MASK 0x3 /* how to restore a signal before an exec() */
883 #define SS_RESTORE_CURR 0 /* leave current handler in place */
884 #define SS_RESTORE_ORIG 1 /* restore original handler */
885 #define SS_RESTORE_DFL 2 /* restore to SIG_DFL */
886 #define SS_RESTORE_IGN 3 /* restore to SIG_IGN */
887 #define SS_FORCE BIT(3) /* set signal even if original signal ignored */
888 #define SS_USER BIT(4) /* user is doing the set (ie, trap command) */
889 #define SS_SHTRAP BIT(5) /* trap for internal use (ALRM, CHLD, WINCH) */
890
891 #define ksh_SIGEXIT 0 /* for trap EXIT */
892 #define ksh_SIGERR NSIG /* for trap ERR */
893
894 EXTERN volatile sig_atomic_t trap; /* traps pending? */
895 EXTERN volatile sig_atomic_t intrsig; /* pending trap interrupts command */
896 EXTERN volatile sig_atomic_t fatal_trap; /* received a fatal signal */
897 extern Trap sigtraps[NSIG+1];
898
899 /* got_winch = 1 when we need to re-adjust the window size */
900 #ifdef SIGWINCH
901 EXTERN volatile sig_atomic_t got_winch E_INIT(1);
902 #else
903 #define got_winch true
904 #endif
905
906 /*
907 * TMOUT support
908 */
909 /* values for ksh_tmout_state */
910 enum tmout_enum {
911 TMOUT_EXECUTING = 0, /* executing commands */
912 TMOUT_READING, /* waiting for input */
913 TMOUT_LEAVING /* have timed out */
914 };
915 EXTERN unsigned int ksh_tmout;
916 EXTERN enum tmout_enum ksh_tmout_state E_INIT(TMOUT_EXECUTING);
917
918 /* For "You have stopped jobs" message */
919 EXTERN bool really_exit;
920
921 /*
922 * fast character classes
923 */
924 #define C_ALPHA BIT(0) /* a-z_A-Z */
925 #define C_DIGIT BIT(1) /* 0-9 */
926 #define C_LEX1 BIT(2) /* \t \n\0|&;<>() */
927 #define C_VAR1 BIT(3) /* *@#!$-? */
928 #define C_IFSWS BIT(4) /* \t \n (IFS white space) */
929 #define C_SUBOP1 BIT(5) /* "=-+?" */
930 #define C_QUOTE BIT(6) /* \t\n "#$&'()*;<=>?[\]`| (needing quoting) */
931 #define C_IFS BIT(7) /* $IFS */
932 #define C_SUBOP2 BIT(8) /* "#%" (magic, see below) */
933
934 extern unsigned char chtypes[];
935
936 #define ctype(c, t) tobool( ((t) == C_SUBOP2) ? \
937 (((c) == '#' || (c) == '%') ? 1 : 0) : \
938 (chtypes[(unsigned char)(c)] & (t)) )
939 #define ksh_isalphx(c) ctype((c), C_ALPHA)
940 #define ksh_isalnux(c) ctype((c), C_ALPHA | C_DIGIT)
941
942 EXTERN int ifs0 E_INIT(' '); /* for "$*" */
943
944 /* Argument parsing for built-in commands and getopts command */
945
946 /* Values for Getopt.flags */
947 #define GF_ERROR BIT(0) /* call errorf() if there is an error */
948 #define GF_PLUSOPT BIT(1) /* allow +c as an option */
949 #define GF_NONAME BIT(2) /* don't print argv[0] in errors */
950
951 /* Values for Getopt.info */
952 #define GI_MINUS BIT(0) /* an option started with -... */
953 #define GI_PLUS BIT(1) /* an option started with +... */
954 #define GI_MINUSMINUS BIT(2) /* arguments were ended with -- */
955
956 /* in case some OS defines these */
957 #undef optarg
958 #undef optind
959
960 typedef struct {
961 const char *optarg;
962 int optind;
963 int uoptind; /* what user sees in $OPTIND */
964 int flags; /* see GF_* */
965 int info; /* see GI_* */
966 unsigned int p; /* 0 or index into argv[optind - 1] */
967 char buf[2]; /* for bad option OPTARG value */
968 } Getopt;
969
970 EXTERN Getopt builtin_opt; /* for shell builtin commands */
971 EXTERN Getopt user_opt; /* parsing state for getopts builtin command */
972
973 /* This for co-processes */
974
975 /* something that won't (realisticly) wrap */
976 typedef int32_t Coproc_id;
977
978 struct coproc {
979 void *job; /* 0 or job of co-process using input pipe */
980 int read; /* pipe from co-process's stdout */
981 int readw; /* other side of read (saved temporarily) */
982 int write; /* pipe to co-process's stdin */
983 int njobs; /* number of live jobs using output pipe */
984 Coproc_id id; /* id of current output pipe */
985 };
986 EXTERN struct coproc coproc;
987
988 #ifndef MKSH_NOPROSPECTOFWORK
989 /* used in jobs.c and by coprocess stuff in exec.c and select() calls */
990 EXTERN sigset_t sm_default, sm_sigchld;
991 #endif
992
993 /* name of called builtin function (used by error functions) */
994 EXTERN const char *builtin_argv0;
995 /* flags of called builtin (SPEC_BI, etc.) */
996 EXTERN uint32_t builtin_flag;
997
998 /* current working directory */
999 EXTERN char *current_wd;
1000
1001 /* input line size */
1002 #define LINE (4096 - ALLOC_SIZE)
1003 /*
1004 * Minimum required space to work with on a line - if the prompt leaves
1005 * less space than this on a line, the prompt is truncated.
1006 */
1007 #define MIN_EDIT_SPACE 7
1008 /*
1009 * Minimum allowed value for x_cols: 2 for prompt, 3 for " < " at end of line
1010 */
1011 #define MIN_COLS (2 + MIN_EDIT_SPACE + 3)
1012 #define MIN_LINS 3
1013 EXTERN mksh_ari_t x_cols E_INIT(80); /* tty columns */
1014 EXTERN mksh_ari_t x_lins E_INIT(24); /* tty lines */
1015
1016
1017 /* Determine the location of the system (common) profile */
1018
1019 #ifndef MKSH_DEFAULT_PROFILEDIR
1020 #if defined(ANDROID)
1021 #define MKSH_DEFAULT_PROFILEDIR "/system/etc"
1022 #else
1023 #define MKSH_DEFAULT_PROFILEDIR "/etc"
1024 #endif
1025 #endif
1026
1027 #define MKSH_SYSTEM_PROFILE MKSH_DEFAULT_PROFILEDIR "/profile"
1028 #define MKSH_SUID_PROFILE MKSH_DEFAULT_PROFILEDIR "/suid_profile"
1029
1030
1031 /* Used by v_evaluate() and setstr() to control action when error occurs */
1032 #define KSH_UNWIND_ERROR 0 /* unwind the stack (kshlongjmp) */
1033 #define KSH_RETURN_ERROR 1 /* return 1/0 for success/failure */
1034
1035 /*
1036 * Shell file I/O routines
1037 */
1038
1039 #define SHF_BSIZE 512
1040
1041 #define shf_fileno(shf) ((shf)->fd)
1042 #define shf_setfileno(shf,nfd) ((shf)->fd = (nfd))
1043 #define shf_getc_i(shf) ((shf)->rnleft > 0 ? \
1044 (shf)->rnleft--, *(shf)->rp++ : \
1045 shf_getchar(shf))
1046 #define shf_putc_i(c, shf) ((shf)->wnleft == 0 ? \
1047 shf_putchar((c), (shf)) : \
1048 ((shf)->wnleft--, *(shf)->wp++ = (c)))
1049 #define shf_eof(shf) ((shf)->flags & SHF_EOF)
1050 #define shf_error(shf) ((shf)->flags & SHF_ERROR)
1051 #define shf_errno(shf) ((shf)->errnosv)
1052 #define shf_clearerr(shf) ((shf)->flags &= ~(SHF_EOF | SHF_ERROR))
1053
1054 /* Flags passed to shf_*open() */
1055 #define SHF_RD 0x0001
1056 #define SHF_WR 0x0002
1057 #define SHF_RDWR (SHF_RD|SHF_WR)
1058 #define SHF_ACCMODE 0x0003 /* mask */
1059 #define SHF_GETFL 0x0004 /* use fcntl() to figure RD/WR flags */
1060 #define SHF_UNBUF 0x0008 /* unbuffered I/O */
1061 #define SHF_CLEXEC 0x0010 /* set close on exec flag */
1062 #define SHF_MAPHI 0x0020 /* make fd > FDBASE (and close orig)
1063 * (shf_open() only) */
1064 #define SHF_DYNAMIC 0x0040 /* string: increase buffer as needed */
1065 #define SHF_INTERRUPT 0x0080 /* EINTR in read/write causes error */
1066 /* Flags used internally */
1067 #define SHF_STRING 0x0100 /* a string, not a file */
1068 #define SHF_ALLOCS 0x0200 /* shf and shf->buf were alloc()ed */
1069 #define SHF_ALLOCB 0x0400 /* shf->buf was alloc()ed */
1070 #define SHF_ERROR 0x0800 /* read()/write() error */
1071 #define SHF_EOF 0x1000 /* read eof (sticky) */
1072 #define SHF_READING 0x2000 /* currently reading: rnleft,rp valid */
1073 #define SHF_WRITING 0x4000 /* currently writing: wnleft,wp valid */
1074
1075
1076 struct shf {
1077 Area *areap; /* area shf/buf were allocated in */
1078 unsigned char *rp; /* read: current position in buffer */
1079 unsigned char *wp; /* write: current position in buffer */
1080 unsigned char *buf; /* buffer */
1081 ssize_t bsize; /* actual size of buf */
1082 ssize_t rbsize; /* size of buffer (1 if SHF_UNBUF) */
1083 ssize_t rnleft; /* read: how much data left in buffer */
1084 ssize_t wbsize; /* size of buffer (0 if SHF_UNBUF) */
1085 ssize_t wnleft; /* write: how much space left in buffer */
1086 int flags; /* see SHF_* */
1087 int fd; /* file descriptor */
1088 int errnosv; /* saved value of errno after error */
1089 };
1090
1091 extern struct shf shf_iob[];
1092
1093 struct table {
1094 Area *areap; /* area to allocate entries */
1095 struct tbl **tbls; /* hashed table items */
1096 size_t nfree; /* free table entries */
1097 uint8_t tshift; /* table size (2^tshift) */
1098 };
1099
1100 /* table item */
1101 struct tbl {
1102 /* Area to allocate from */
1103 Area *areap;
1104 /* value */
1105 union {
1106 char *s; /* string */
1107 mksh_ari_t i; /* integer */
1108 mksh_uari_t u; /* unsigned integer */
1109 int (*f)(const char **); /* built-in command */
1110 struct op *t; /* "function" tree */
1111 } val;
1112 union {
1113 struct tbl *array; /* array values */
1114 const char *fpath; /* temporary path to undef function */
1115 } u;
1116 union {
1117 int field; /* field with for -L/-R/-Z */
1118 int errnov; /* CEXEC/CTALIAS */
1119 } u2;
1120 union {
1121 uint32_t hval; /* hash(name) */
1122 uint32_t index; /* index for an array */
1123 } ua;
1124 /*
1125 * command type (see below), base (if INTEGER),
1126 * offset from val.s of value (if EXPORT)
1127 */
1128 int type;
1129 /* flags (see below) */
1130 uint32_t flag;
1131
1132 /* actually longer: name (variable length) */
1133 char name[4];
1134 };
1135
1136 EXTERN struct tbl vtemp;
1137
1138 /* common flag bits */
1139 #define ALLOC BIT(0) /* val.s has been allocated */
1140 #define DEFINED BIT(1) /* is defined in block */
1141 #define ISSET BIT(2) /* has value, vp->val.[si] */
1142 #define EXPORT BIT(3) /* exported variable/function */
1143 #define TRACE BIT(4) /* var: user flagged, func: execution tracing */
1144 /* (start non-common flags at 8) */
1145 /* flag bits used for variables */
1146 #define SPECIAL BIT(8) /* PATH, IFS, SECONDS, etc */
1147 #define INTEGER BIT(9) /* val.i contains integer value */
1148 #define RDONLY BIT(10) /* read-only variable */
1149 #define LOCAL BIT(11) /* for local typeset() */
1150 #define ARRAY BIT(13) /* array */
1151 #define LJUST BIT(14) /* left justify */
1152 #define RJUST BIT(15) /* right justify */
1153 #define ZEROFIL BIT(16) /* 0 filled if RJUSTIFY, strip 0s if LJUSTIFY */
1154 #define LCASEV BIT(17) /* convert to lower case */
1155 #define UCASEV_AL BIT(18) /* convert to upper case / autoload function */
1156 #define INT_U BIT(19) /* unsigned integer */
1157 #define INT_L BIT(20) /* long integer (no-op but used as magic) */
1158 #define IMPORT BIT(21) /* flag to typeset(): no arrays, must have = */
1159 #define LOCAL_COPY BIT(22) /* with LOCAL - copy attrs from existing var */
1160 #define EXPRINEVAL BIT(23) /* contents currently being evaluated */
1161 #define EXPRLVALUE BIT(24) /* useable as lvalue (temp flag) */
1162 #define AINDEX BIT(25) /* array index >0 = ua.index filled in */
1163 #define ASSOC BIT(26) /* ARRAY ? associative : reference */
1164 /* flag bits used for taliases/builtins/aliases/keywords/functions */
1165 #define KEEPASN BIT(8) /* keep command assignments (eg, var=x cmd) */
1166 #define FINUSE BIT(9) /* function being executed */
1167 #define FDELETE BIT(10) /* function deleted while it was executing */
1168 #define FKSH BIT(11) /* function defined with function x (vs x()) */
1169 #define SPEC_BI BIT(12) /* a POSIX special builtin */
1170 /*
1171 * Attributes that can be set by the user (used to decide if an unset
1172 * param should be repoted by set/typeset). Does not include ARRAY or
1173 * LOCAL.
1174 */
1175 #define USERATTRIB (EXPORT|INTEGER|RDONLY|LJUST|RJUST|ZEROFIL|\
1176 LCASEV|UCASEV_AL|INT_U|INT_L)
1177
1178 #define arrayindex(vp) ((unsigned long)((vp)->flag & AINDEX ? \
1179 (vp)->ua.index : 0))
1180
1181 enum namerefflag {
1182 SRF_NOP,
1183 SRF_ENABLE,
1184 SRF_DISABLE
1185 };
1186
1187 /* command types */
1188 #define CNONE 0 /* undefined */
1189 #define CSHELL 1 /* built-in */
1190 #define CFUNC 2 /* function */
1191 #define CEXEC 4 /* executable command */
1192 #define CALIAS 5 /* alias */
1193 #define CKEYWD 6 /* keyword */
1194 #define CTALIAS 7 /* tracked alias */
1195
1196 /* Flags for findcom()/comexec() */
1197 #define FC_SPECBI BIT(0) /* special builtin */
1198 #define FC_FUNC BIT(1) /* function */
1199 #define FC_NORMBI BIT(2) /* not special builtin */
1200 #define FC_BI (FC_SPECBI | FC_NORMBI)
1201 #define FC_PATH BIT(3) /* do path search */
1202 #define FC_DEFPATH BIT(4) /* use default path in path search */
1203
1204
1205 #define AF_ARGV_ALLOC 0x1 /* argv[] array allocated */
1206 #define AF_ARGS_ALLOCED 0x2 /* argument strings allocated */
1207 #define AI_ARGV(a, i) ((i) == 0 ? (a).argv[0] : (a).argv[(i) - (a).skip])
1208 #define AI_ARGC(a) ((a).ai_argc - (a).skip)
1209
1210 /* Argument info. Used for $#, $* for shell, functions, includes, etc. */
1211 struct arg_info {
1212 const char **argv;
1213 int flags; /* AF_* */
1214 int ai_argc;
1215 int skip; /* first arg is argv[0], second is argv[1 + skip] */
1216 };
1217
1218 /*
1219 * activation record for function blocks
1220 */
1221 struct block {
1222 Area area; /* area to allocate things */
1223 const char **argv;
1224 char *error; /* error handler */
1225 char *exit; /* exit handler */
1226 struct block *next; /* enclosing block */
1227 struct table vars; /* local variables */
1228 struct table funs; /* local functions */
1229 Getopt getopts_state;
1230 int argc;
1231 int flags; /* see BF_* */
1232 };
1233
1234 /* Values for struct block.flags */
1235 #define BF_DOGETOPTS BIT(0) /* save/restore getopts state */
1236
1237 /*
1238 * Used by ktwalk() and ktnext() routines.
1239 */
1240 struct tstate {
1241 struct tbl **next;
1242 ssize_t left;
1243 };
1244
1245 EXTERN struct table taliases; /* tracked aliases */
1246 EXTERN struct table builtins; /* built-in commands */
1247 EXTERN struct table aliases; /* aliases */
1248 EXTERN struct table keywords; /* keywords */
1249 #ifndef MKSH_NOPWNAM
1250 EXTERN struct table homedirs; /* homedir() cache */
1251 #endif
1252
1253 struct builtin {
1254 const char *name;
1255 int (*func)(const char **);
1256 };
1257
1258 extern const struct builtin mkshbuiltins[];
1259
1260 /* values for set_prompt() */
1261 #define PS1 0 /* command */
1262 #define PS2 1 /* command continuation */
1263
1264 EXTERN char *path; /* copy of either PATH or def_path */
1265 EXTERN const char *def_path; /* path to use if PATH not set */
1266 EXTERN char *tmpdir; /* TMPDIR value */
1267 EXTERN const char *prompt;
1268 EXTERN int cur_prompt; /* PS1 or PS2 */
1269 EXTERN int current_lineno; /* LINENO value */
1270
1271 /*
1272 * Description of a command or an operation on commands.
1273 */
1274 struct op {
1275 const char **args; /* arguments to a command */
1276 char **vars; /* variable assignments */
1277 struct ioword **ioact; /* IO actions (eg, < > >>) */
1278 struct op *left, *right; /* descendents */
1279 char *str; /* word for case; identifier for for,
1280 * select, and functions;
1281 * path to execute for TEXEC;
1282 * time hook for TCOM.
1283 */
1284 int lineno; /* TCOM/TFUNC: LINENO for this */
1285 short type; /* operation type, see below */
1286 /* WARNING: newtp(), tcopy() use evalflags = 0 to clear union */
1287 union {
1288 /* TCOM: arg expansion eval() flags */
1289 short evalflags;
1290 /* TFUNC: function x (vs x()) */
1291 short ksh_func;
1292 /* TPAT: termination character */
1293 char charflag;
1294 } u;
1295 };
1296
1297 /* Tree.type values */
1298 #define TEOF 0
1299 #define TCOM 1 /* command */
1300 #define TPAREN 2 /* (c-list) */
1301 #define TPIPE 3 /* a | b */
1302 #define TLIST 4 /* a ; b */
1303 #define TOR 5 /* || */
1304 #define TAND 6 /* && */
1305 #define TBANG 7 /* ! */
1306 #define TDBRACKET 8 /* [[ .. ]] */
1307 #define TFOR 9
1308 #define TSELECT 10
1309 #define TCASE 11
1310 #define TIF 12
1311 #define TWHILE 13
1312 #define TUNTIL 14
1313 #define TELIF 15
1314 #define TPAT 16 /* pattern in case */
1315 #define TBRACE 17 /* {c-list} */
1316 #define TASYNC 18 /* c & */
1317 #define TFUNCT 19 /* function name { command; } */
1318 #define TTIME 20 /* time pipeline */
1319 #define TEXEC 21 /* fork/exec eval'd TCOM */
1320 #define TCOPROC 22 /* coprocess |& */
1321
1322 /*
1323 * prefix codes for words in command tree
1324 */
1325 #define EOS 0 /* end of string */
1326 #define CHAR 1 /* unquoted character */
1327 #define QCHAR 2 /* quoted character */
1328 #define COMSUB 3 /* $() substitution (0 terminated) */
1329 #define EXPRSUB 4 /* $(()) substitution (0 terminated) */
1330 #define OQUOTE 5 /* opening " or ' */
1331 #define CQUOTE 6 /* closing " or ' */
1332 #define OSUBST 7 /* opening ${ subst (followed by { or X) */
1333 #define CSUBST 8 /* closing } of above (followed by } or X) */
1334 #define OPAT 9 /* open pattern: *(, @(, etc. */
1335 #define SPAT 10 /* separate pattern: | */
1336 #define CPAT 11 /* close pattern: ) */
1337 #define ADELIM 12 /* arbitrary delimiter: ${foo:2:3} ${foo/bar/baz} */
1338 #define FUNSUB 14 /* ${ foo;} substitution (NUL terminated) */
1339 #define VALSUB 15 /* ${|foo;} substitution (NUL terminated) */
1340
1341 /*
1342 * IO redirection
1343 */
1344 struct ioword {
1345 int unit; /* unit affected */
1346 int flag; /* action (below) */
1347 char *name; /* file name (unused if heredoc) */
1348 char *delim; /* delimiter for <<,<<- */
1349 char *heredoc; /* content of heredoc */
1350 };
1351
1352 /* ioword.flag - type of redirection */
1353 #define IOTYPE 0xF /* type: bits 0:3 */
1354 #define IOREAD 0x1 /* < */
1355 #define IOWRITE 0x2 /* > */
1356 #define IORDWR 0x3 /* <>: todo */
1357 #define IOHERE 0x4 /* << (here file) */
1358 #define IOCAT 0x5 /* >> */
1359 #define IODUP 0x6 /* <&/>& */
1360 #define IOEVAL BIT(4) /* expand in << */
1361 #define IOSKIP BIT(5) /* <<-, skip ^\t* */
1362 #define IOCLOB BIT(6) /* >|, override -o noclobber */
1363 #define IORDUP BIT(7) /* x<&y (as opposed to x>&y) */
1364 #define IONAMEXP BIT(8) /* name has been expanded */
1365 #define IOBASH BIT(9) /* &> etc. */
1366 #define IOHERESTR BIT(10) /* <<< (here string) */
1367 #define IONDELIM BIT(11) /* null delimiter (<<) */
1368
1369 /* execute/exchild flags */
1370 #define XEXEC BIT(0) /* execute without forking */
1371 #define XFORK BIT(1) /* fork before executing */
1372 #define XBGND BIT(2) /* command & */
1373 #define XPIPEI BIT(3) /* input is pipe */
1374 #define XPIPEO BIT(4) /* output is pipe */
1375 #define XXCOM BIT(5) /* `...` command */
1376 #define XPCLOSE BIT(6) /* exchild: close close_fd in parent */
1377 #define XCCLOSE BIT(7) /* exchild: close close_fd in child */
1378 #define XERROK BIT(8) /* non-zero exit ok (for set -e) */
1379 #define XCOPROC BIT(9) /* starting a co-process */
1380 #define XTIME BIT(10) /* timing TCOM command */
1381 #define XPIPEST BIT(11) /* want PIPESTATUS */
1382
1383 /*
1384 * flags to control expansion of words (assumed by t->evalflags to fit
1385 * in a short)
1386 */
1387 #define DOBLANK BIT(0) /* perform blank interpretation */
1388 #define DOGLOB BIT(1) /* expand [?* */
1389 #define DOPAT BIT(2) /* quote *?[ */
1390 #define DOTILDE BIT(3) /* normal ~ expansion (first char) */
1391 #define DONTRUNCOMMAND BIT(4) /* do not run $(command) things */
1392 #define DOASNTILDE BIT(5) /* assignment ~ expansion (after =, :) */
1393 #define DOBRACE BIT(6) /* used by expand(): do brace expansion */
1394 #define DOMAGIC BIT(7) /* used by expand(): string contains MAGIC */
1395 #define DOTEMP BIT(8) /* dito: in word part of ${..[%#=?]..} */
1396 #define DOVACHECK BIT(9) /* var assign check (for typeset, set, etc) */
1397 #define DOMARKDIRS BIT(10) /* force markdirs behaviour */
1398 #define DOTCOMEXEC BIT(11) /* not an eval flag, used by sh -c hack */
1399 #define DOASNFIELD BIT(12) /* is assignment, change field handling */
1400
1401 #define X_EXTRA 20 /* this many extra bytes in X string */
1402
1403 typedef struct XString {
1404 char *end, *beg; /* end, begin of string */
1405 size_t len; /* length */
1406 Area *areap; /* area to allocate/free from */
1407 } XString;
1408
1409 typedef char *XStringP;
1410
1411 /* initialise expandable string */
1412 #define XinitN(xs, length, area) do { \
1413 (xs).len = (length); \
1414 (xs).areap = (area); \
1415 (xs).beg = alloc((xs).len + X_EXTRA, (xs).areap); \
1416 (xs).end = (xs).beg + (xs).len; \
1417 } while (/* CONSTCOND */ 0)
1418 #define Xinit(xs, xp, length, area) do { \
1419 XinitN((xs), (length), (area)); \
1420 (xp) = (xs).beg; \
1421 } while (/* CONSTCOND */ 0)
1422
1423 /* stuff char into string */
1424 #define Xput(xs, xp, c) (*xp++ = (c))
1425
1426 /* check if there are at least n bytes left */
1427 #define XcheckN(xs, xp, n) do { \
1428 ssize_t more = ((xp) + (n)) - (xs).end; \
1429 if (more > 0) \
1430 (xp) = Xcheck_grow(&(xs), (xp), (size_t)more); \
1431 } while (/* CONSTCOND */ 0)
1432
1433 /* check for overflow, expand string */
1434 #define Xcheck(xs, xp) XcheckN((xs), (xp), 1)
1435
1436 /* free string */
1437 #define Xfree(xs, xp) afree((xs).beg, (xs).areap)
1438
1439 /* close, return string */
1440 #define Xclose(xs, xp) aresize((xs).beg, (xp) - (xs).beg, (xs).areap)
1441
1442 /* begin of string */
1443 #define Xstring(xs, xp) ((xs).beg)
1444
1445 #define Xnleft(xs, xp) ((xs).end - (xp)) /* may be less than 0 */
1446 #define Xlength(xs, xp) ((xp) - (xs).beg)
1447 #define Xsize(xs, xp) ((xs).end - (xs).beg)
1448 #define Xsavepos(xs, xp) ((xp) - (xs).beg)
1449 #define Xrestpos(xs, xp, n) ((xs).beg + (n))
1450
1451 char *Xcheck_grow(XString *, const char *, size_t);
1452
1453 /*
1454 * expandable vector of generic pointers
1455 */
1456
1457 typedef struct {
1458 /* begin of allocated area */
1459 void **beg;
1460 /* currently used number of entries */
1461 size_t len;
1462 /* allocated number of entries */
1463 size_t siz;
1464 } XPtrV;
1465
1466 #define XPinit(x, n) do { \
1467 (x).siz = (n); \
1468 (x).len = 0; \
1469 (x).beg = alloc2((x).siz, sizeof(void *), ATEMP); \
1470 } while (/* CONSTCOND */ 0) \
1471
1472 #define XPput(x, p) do { \
1473 if ((x).len == (x).siz) { \
1474 (x).beg = aresize2((x).beg, (x).siz, \
1475 2 * sizeof(void *), ATEMP); \
1476 (x).siz <<= 1; \
1477 } \
1478 (x).beg[(x).len++] = (p); \
1479 } while (/* CONSTCOND */ 0)
1480
1481 #define XPptrv(x) ((x).beg)
1482 #define XPsize(x) ((x).len)
1483 #define XPclose(x) aresize2((x).beg, XPsize(x), sizeof(void *), ATEMP)
1484 #define XPfree(x) afree((x).beg, ATEMP)
1485
1486 /*
1487 * Lexer internals
1488 */
1489
1490 typedef struct source Source;
1491 struct source {
1492 const char *str; /* input pointer */
1493 const char *start; /* start of current buffer */
1494 union {
1495 const char **strv; /* string [] */
1496 struct shf *shf; /* shell file */
1497 struct tbl *tblp; /* alias (SF_HASALIAS) */
1498 char *freeme; /* also for SREREAD */
1499 } u;
1500 const char *file; /* input file name */
1501 int type; /* input type */
1502 int line; /* line number */
1503 int errline; /* line the error occurred on (0 if not set) */
1504 int flags; /* SF_* */
1505 Area *areap;
1506 Source *next; /* stacked source */
1507 XString xs; /* input buffer */
1508 char ugbuf[2]; /* buffer for ungetsc() (SREREAD) and
1509 * alias (SALIAS) */
1510 };
1511
1512 /* Source.type values */
1513 #define SEOF 0 /* input EOF */
1514 #define SFILE 1 /* file input */
1515 #define SSTDIN 2 /* read stdin */
1516 #define SSTRING 3 /* string */
1517 #define SWSTR 4 /* string without \n */
1518 #define SWORDS 5 /* string[] */
1519 #define SWORDSEP 6 /* string[] separator */
1520 #define SALIAS 7 /* alias expansion */
1521 #define SREREAD 8 /* read ahead to be re-scanned */
1522 #define SSTRINGCMDLINE 9 /* string from "mksh -c ..." */
1523
1524 /* Source.flags values */
1525 #define SF_ECHO BIT(0) /* echo input to shlout */
1526 #define SF_ALIAS BIT(1) /* faking space at end of alias */
1527 #define SF_ALIASEND BIT(2) /* faking space at end of alias */
1528 #define SF_TTY BIT(3) /* type == SSTDIN & it is a tty */
1529 #define SF_HASALIAS BIT(4) /* u.tblp valid (SALIAS, SEOF) */
1530 #define SF_MAYEXEC BIT(5) /* special sh -c optimisation hack */
1531
1532 typedef union {
1533 int i;
1534 char *cp;
1535 char **wp;
1536 struct op *o;
1537 struct ioword *iop;
1538 } YYSTYPE;
1539
1540 /* If something is added here, add it to tokentab[] in syn.c as well */
1541 #define LWORD 256
1542 #define LOGAND 257 /* && */
1543 #define LOGOR 258 /* || */
1544 #define BREAK 259 /* ;; */
1545 #define IF 260
1546 #define THEN 261
1547 #define ELSE 262
1548 #define ELIF 263
1549 #define FI 264
1550 #define CASE 265
1551 #define ESAC 266
1552 #define FOR 267
1553 #define SELECT 268
1554 #define WHILE 269
1555 #define UNTIL 270
1556 #define DO 271
1557 #define DONE 272
1558 #define IN 273
1559 #define FUNCTION 274
1560 #define TIME 275
1561 #define REDIR 276
1562 #define MDPAREN 277 /* (( )) */
1563 #define BANG 278 /* ! */
1564 #define DBRACKET 279 /* [[ .. ]] */
1565 #define COPROC 280 /* |& */
1566 #define BRKEV 281 /* ;| */
1567 #define BRKFT 282 /* ;& */
1568 #define YYERRCODE 300
1569
1570 /* flags to yylex */
1571 #define CONTIN BIT(0) /* skip new lines to complete command */
1572 #define ONEWORD BIT(1) /* single word for substitute() */
1573 #define ALIAS BIT(2) /* recognise alias */
1574 #define KEYWORD BIT(3) /* recognise keywords */
1575 #define LETEXPR BIT(4) /* get expression inside (( )) */
1576 #define VARASN BIT(5) /* check for var=word */
1577 #define ARRAYVAR BIT(6) /* parse x[1 & 2] as one word */
1578 #define ESACONLY BIT(7) /* only accept esac keyword */
1579 #define CMDWORD BIT(8) /* parsing simple command (alias related) */
1580 #define HEREDELIM BIT(9) /* parsing <<,<<- delimiter */
1581 #define LQCHAR BIT(10) /* source string contains QCHAR */
1582 #define HEREDOC BIT(11) /* parsing a here document body */
1583
1584 #define HERES 10 /* max number of << in line */
1585
1586 #undef CTRL
1587 #define CTRL(x) ((x) == '?' ? 0x7F : (x) & 0x1F) /* ASCII */
1588 #define UNCTRL(x) ((x) ^ 0x40) /* ASCII */
1589 #define ISCTRL(x) (((signed char)((uint8_t)(x) + 1)) < 33)
1590
1591 #define IDENT 64
1592
1593 EXTERN Source *source; /* yyparse/yylex source */
1594 EXTERN YYSTYPE yylval; /* result from yylex */
1595 EXTERN struct ioword *heres[HERES], **herep;
1596 EXTERN char ident[IDENT + 1];
1597
1598 EXTERN char **history; /* saved commands */
1599 EXTERN char **histptr; /* last history item */
1600 EXTERN mksh_ari_t histsize; /* history size */
1601
1602 /* user and system time of last j_waitjed job */
1603 EXTERN struct timeval j_usrtime, j_systime;
1604
1605 #define notok2mul(max, val, c) (((val) != 0) && ((c) != 0) && \
1606 (((max) / (c)) < (val)))
1607 #define notok2add(max, val, c) ((val) > ((max) - (c)))
1608 #define notoktomul(val, cnst) notok2mul(SIZE_MAX, (val), (cnst))
1609 #define notoktoadd(val, cnst) notok2add(SIZE_MAX, (val), (cnst))
1610 #define checkoktoadd(val, cnst) do { \
1611 if (notoktoadd((val), (cnst))) \
1612 internal_errorf(Tintovfl, (size_t)(val), \
1613 '+', (size_t)(cnst)); \
1614 } while (/* CONSTCOND */ 0)
1615
1616
1617 /* lalloc.c */
1618 void ainit(Area *);
1619 void afreeall(Area *);
1620 /* these cannot fail and can take NULL (not for ap) */
1621 #define alloc(n, ap) aresize(NULL, (n), (ap))
1622 #define alloc2(m, n, ap) aresize2(NULL, (m), (n), (ap))
1623 void *aresize(void *, size_t, Area *);
1624 void *aresize2(void *, size_t, size_t, Area *);
1625 void afree(void *, Area *); /* can take NULL */
1626 /* edit.c */
1627 #ifndef MKSH_NO_CMDLINE_EDITING
1628 #ifndef MKSH_SMALL
1629 int x_bind(const char *, const char *, bool, bool);
1630 #else
1631 int x_bind(const char *, const char *, bool);
1632 #endif
1633 void x_init(void);
1634 #ifdef DEBUG_LEAKS
1635 void x_done(void);
1636 #endif
1637 int x_read(char *);
1638 #endif
1639 void x_mkraw(int, mksh_ttyst *, bool);
1640 /* eval.c */
1641 char *substitute(const char *, int);
1642 char **eval(const char **, int);
1643 char *evalstr(const char *cp, int);
1644 char *evalonestr(const char *cp, int);
1645 char *debunk(char *, const char *, size_t);
1646 void expand(const char *, XPtrV *, int);
1647 int glob_str(char *, XPtrV *, bool);
1648 char *tilde(char *);
1649 /* exec.c */
1650 int execute(struct op * volatile, volatile int, volatile int * volatile);
1651 int shcomexec(const char **);
1652 struct tbl *findfunc(const char *, uint32_t, bool);
1653 int define(const char *, struct op *);
1654 const char *builtin(const char *, int (*)(const char **));
1655 struct tbl *findcom(const char *, int);
1656 void flushcom(bool);
1657 const char *search_path(const char *, const char *, int, int *);
1658 void pr_menu(const char * const *);
1659 void pr_list(char * const *);
1660 /* expr.c */
1661 int evaluate(const char *, mksh_ari_t *, int, bool);
1662 int v_evaluate(struct tbl *, const char *, volatile int, bool);
1663 /* UTF-8 stuff */
1664 size_t utf_mbtowc(unsigned int *, const char *);
1665 size_t utf_wctomb(char *, unsigned int);
1666 int utf_widthadj(const char *, const char **);
1667 size_t utf_mbswidth(const char *) MKSH_A_PURE;
1668 const char *utf_skipcols(const char *, int) MKSH_A_PURE;
1669 size_t utf_ptradj(const char *) MKSH_A_PURE;
1670 int utf_wcwidth(unsigned int) MKSH_A_PURE;
1671 int ksh_access(const char *, int);
1672 struct tbl *tempvar(void);
1673 /* funcs.c */
1674 int c_hash(const char **);
1675 int c_pwd(const char **);
1676 int c_print(const char **);
1677 #ifdef MKSH_PRINTF_BUILTIN
1678 int c_printf(const char **);
1679 #endif
1680 int c_whence(const char **);
1681 int c_command(const char **);
1682 int c_typeset(const char **);
1683 int c_alias(const char **);
1684 int c_unalias(const char **);
1685 int c_let(const char **);
1686 int c_jobs(const char **);
1687 #ifndef MKSH_UNEMPLOYED
1688 int c_fgbg(const char **);
1689 #endif
1690 int c_kill(const char **);
1691 void getopts_reset(int);
1692 int c_getopts(const char **);
1693 #ifndef MKSH_NO_CMDLINE_EDITING
1694 int c_bind(const char **);
1695 #endif
1696 int c_shift(const char **);
1697 int c_umask(const char **);
1698 int c_dot(const char **);
1699 int c_wait(const char **);
1700 int c_read(const char **);
1701 int c_eval(const char **);
1702 int c_trap(const char **);
1703 int c_brkcont(const char **);
1704 int c_exitreturn(const char **);
1705 int c_set(const char **);
1706 int c_unset(const char **);
1707 int c_ulimit(const char **);
1708 int c_times(const char **);
1709 int timex(struct op *, int, volatile int *);
1710 void timex_hook(struct op *, char ** volatile *);
1711 int c_exec(const char **);
1712 /* dummy function (just need pointer value), special case in comexec() */
1713 #define c_builtin shcomexec
1714 int c_test(const char **);
1715 #if HAVE_MKNOD
1716 int c_mknod(const char **);
1717 #endif
1718 int c_realpath(const char **);
1719 int c_rename(const char **);
1720 int c_cat(const char **);
1721 int c_sleep(const char **);
1722 /* histrap.c */
1723 void init_histvec(void);
1724 void hist_init(Source *);
1725 #if HAVE_PERSISTENT_HISTORY
1726 void hist_finish(void);
1727 #endif
1728 void histsave(int *, const char *, bool, bool);
1729 #if !defined(MKSH_SMALL) && HAVE_PERSISTENT_HISTORY
1730 bool histsync(void);
1731 #endif
1732 int c_fc(const char **);
1733 void sethistsize(mksh_ari_t);
1734 #if HAVE_PERSISTENT_HISTORY
1735 void sethistfile(const char *);
1736 #endif
1737 #if !defined(MKSH_NO_CMDLINE_EDITING) && !MKSH_S_NOVI
1738 char **histpos(void) MKSH_A_PURE;
1739 int histnum(int);
1740 #endif
1741 int findhist(int, int, const char *, bool) MKSH_A_PURE;
1742 char **hist_get_newest(bool);
1743 void inittraps(void);
1744 void alarm_init(void);
1745 Trap *gettrap(const char *, bool);
1746 void trapsig(int);
1747 void intrcheck(void);
1748 int fatal_trap_check(void);
1749 int trap_pending(void);
1750 void runtraps(int intr);
1751 void runtrap(Trap *, bool);
1752 void cleartraps(void);
1753 void restoresigs(void);
1754 void settrap(Trap *, const char *);
1755 int block_pipe(void);
1756 void restore_pipe(int);
1757 int setsig(Trap *, sig_t, int);
1758 void setexecsig(Trap *, int);
1759 #if HAVE_FLOCK || HAVE_LOCK_FCNTL
1760 void mksh_lockfd(int);
1761 void mksh_unlkfd(int);
1762 #endif
1763 /* jobs.c */
1764 void j_init(void);
1765 void j_exit(void);
1766 #ifndef MKSH_UNEMPLOYED
1767 void j_change(void);
1768 #endif
1769 int exchild(struct op *, int, volatile int *, int);
1770 void startlast(void);
1771 int waitlast(void);
1772 int waitfor(const char *, int *);
1773 int j_kill(const char *, int);
1774 #ifndef MKSH_UNEMPLOYED
1775 int j_resume(const char *, int);
1776 #endif
1777 #if !defined(MKSH_UNEMPLOYED) && HAVE_GETSID
1778 void j_suspend(void);
1779 #endif
1780 int j_jobs(const char *, int, int);
1781 void j_notify(void);
1782 pid_t j_async(void);
1783 int j_stopped_running(void);
1784 /* lex.c */
1785 int yylex(int);
1786 void yyskiputf8bom(void);
1787 void yyerror(const char *, ...)
1788 MKSH_A_NORETURN
1789 MKSH_A_FORMAT(__printf__, 1, 2);
1790 Source *pushs(int, Area *);
1791 void set_prompt(int, Source *);
1792 int pprompt(const char *, int);
1793 /* main.c */
1794 int include(const char *, int, const char **, bool);
1795 int command(const char *, int);
1796 int shell(Source * volatile, volatile bool);
1797 /* argument MUST NOT be 0 */
1798 void unwind(int) MKSH_A_NORETURN;
1799 void newenv(int);
1800 void quitenv(struct shf *);
1801 void cleanup_parents_env(void);
1802 void cleanup_proc_env(void);
1803 void errorf(const char *, ...)
1804 MKSH_A_NORETURN
1805 MKSH_A_FORMAT(__printf__, 1, 2);
1806 void errorfx(int, const char *, ...)
1807 MKSH_A_NORETURN
1808 MKSH_A_FORMAT(__printf__, 2, 3);
1809 void warningf(bool, const char *, ...)
1810 MKSH_A_FORMAT(__printf__, 2, 3);
1811 void bi_errorf(const char *, ...)
1812 MKSH_A_FORMAT(__printf__, 1, 2);
1813 #define errorfz() errorf(NULL)
1814 #define errorfxz(rc) errorfx((rc), NULL)
1815 #define bi_errorfz() bi_errorf(NULL)
1816 void internal_errorf(const char *, ...)
1817 MKSH_A_NORETURN
1818 MKSH_A_FORMAT(__printf__, 1, 2);
1819 void internal_warningf(const char *, ...)
1820 MKSH_A_FORMAT(__printf__, 1, 2);
1821 void error_prefix(bool);
1822 void shellf(const char *, ...)
1823 MKSH_A_FORMAT(__printf__, 1, 2);
1824 void shprintf(const char *, ...)
1825 MKSH_A_FORMAT(__printf__, 1, 2);
1826 int can_seek(int);
1827 void initio(void);
1828 int ksh_dup2(int, int, bool);
1829 short savefd(int);
1830 void restfd(int, int);
1831 void openpipe(int *);
1832 void closepipe(int *);
1833 int check_fd(const char *, int, const char **);
1834 void coproc_init(void);
1835 void coproc_read_close(int);
1836 void coproc_readw_close(int);
1837 void coproc_write_close(int);
1838 int coproc_getfd(int, const char **);
1839 void coproc_cleanup(int);
1840 struct temp *maketemp(Area *, Temp_type, struct temp **);
1841 void ktinit(Area *, struct table *, uint8_t);
1842 struct tbl *ktscan(struct table *, const char *, uint32_t, struct tbl ***);
1843 /* table, name (key) to search for, hash(n) */
1844 #define ktsearch(tp, s, h) ktscan((tp), (s), (h), NULL)
1845 struct tbl *ktenter(struct table *, const char *, uint32_t);
1846 #define ktdelete(p) do { p->flag = 0; } while (/* CONSTCOND */ 0)
1847 void ktwalk(struct tstate *, struct table *);
1848 struct tbl *ktnext(struct tstate *);
1849 struct tbl **ktsort(struct table *);
1850 #ifdef DF
1851 void DF(const char *, ...)
1852 MKSH_A_FORMAT(__printf__, 1, 2);
1853 #endif
1854 /* misc.c */
1855 void setctypes(const char *, int);
1856 void initctypes(void);
1857 size_t option(const char *) MKSH_A_PURE;
1858 char *getoptions(void);
1859 void change_flag(enum sh_flag, int, bool);
1860 void change_xtrace(unsigned char, bool);
1861 int parse_args(const char **, int, bool *);
1862 int getn(const char *, int *);
1863 int gmatchx(const char *, const char *, bool);
1864 int has_globbing(const char *, const char *) MKSH_A_PURE;
1865 int xstrcmp(const void *, const void *) MKSH_A_PURE;
1866 void ksh_getopt_reset(Getopt *, int);
1867 int ksh_getopt(const char **, Getopt *, const char *);
1868 void print_value_quoted(struct shf *, const char *);
1869 char *quote_value(const char *);
1870 void print_columns(struct shf *, unsigned int,
1871 char *(*)(char *, size_t, unsigned int, const void *),
1872 const void *, size_t, size_t, bool);
1873 void strip_nuls(char *, int);
1874 ssize_t blocking_read(int, char *, size_t)
1875 MKSH_A_BOUNDED(__buffer__, 2, 3);
1876 int reset_nonblock(int);
1877 char *ksh_get_wd(void);
1878 char *do_realpath(const char *);
1879 void simplify_path(char *);
1880 void set_current_wd(const char *);
1881 int c_cd(const char **);
1882 #if defined(MKSH_SMALL) && !defined(MKSH_SMALL_BUT_FAST)
1883 char *strdup_i(const char *, Area *);
1884 char *strndup_i(const char *, size_t, Area *);
1885 #endif
1886 int unbksl(bool, int (*)(void), void (*)(int));
1887 /* shf.c */
1888 struct shf *shf_open(const char *, int, int, int);
1889 struct shf *shf_fdopen(int, int, struct shf *);
1890 struct shf *shf_reopen(int, int, struct shf *);
1891 struct shf *shf_sopen(char *, ssize_t, int, struct shf *);
1892 int shf_close(struct shf *);
1893 int shf_fdclose(struct shf *);
1894 char *shf_sclose(struct shf *);
1895 int shf_flush(struct shf *);
1896 ssize_t shf_read(char *, ssize_t, struct shf *);
1897 char *shf_getse(char *, ssize_t, struct shf *);
1898 int shf_getchar(struct shf *s);
1899 int shf_ungetc(int, struct shf *);
1900 #if defined(MKSH_SMALL) && !defined(MKSH_SMALL_BUT_FAST)
1901 int shf_getc(struct shf *);
1902 int shf_putc(int, struct shf *);
1903 #else
1904 #define shf_getc shf_getc_i
1905 #define shf_putc shf_putc_i
1906 #endif
1907 int shf_putchar(int, struct shf *);
1908 ssize_t shf_puts(const char *, struct shf *);
1909 ssize_t shf_write(const char *, ssize_t, struct shf *);
1910 ssize_t shf_fprintf(struct shf *, const char *, ...)
1911 MKSH_A_FORMAT(__printf__, 2, 3);
1912 ssize_t shf_snprintf(char *, ssize_t, const char *, ...)
1913 MKSH_A_FORMAT(__printf__, 3, 4)
1914 MKSH_A_BOUNDED(__string__, 1, 2);
1915 char *shf_smprintf(const char *, ...)
1916 MKSH_A_FORMAT(__printf__, 1, 2);
1917 ssize_t shf_vfprintf(struct shf *, const char *, va_list)
1918 MKSH_A_FORMAT(__printf__, 2, 0);
1919 /* syn.c */
1920 void initkeywords(void);
1921 struct op *compile(Source *, bool);
1922 bool parse_usec(const char *, struct timeval *);
1923 char *yyrecursive(int);
1924 void yyrecursive_pop(bool);
1925 /* tree.c */
1926 void fptreef(struct shf *, int, const char *, ...);
1927 char *snptreef(char *, ssize_t, const char *, ...);
1928 struct op *tcopy(struct op *, Area *);
1929 char *wdcopy(const char *, Area *);
1930 const char *wdscan(const char *, int);
1931 #define WDS_TPUTS BIT(0) /* tputS (dumpwdvar) mode */
1932 #define WDS_KEEPQ BIT(1) /* keep quote characters */
1933 #define WDS_MAGIC BIT(2) /* make MAGIC */
1934 char *wdstrip(const char *, int);
1935 void tfree(struct op *, Area *);
1936 void dumpchar(struct shf *, int);
1937 void dumptree(struct shf *, struct op *);
1938 void dumpwdvar(struct shf *, const char *);
1939 void dumpioact(struct shf *shf, struct op *t);
1940 void vistree(char *, size_t, struct op *)
1941 MKSH_A_BOUNDED(__string__, 1, 2);
1942 void fpFUNCTf(struct shf *, int, bool, const char *, struct op *);
1943 /* var.c */
1944 void newblock(void);
1945 void popblock(void);
1946 void initvar(void);
1947 struct block *varsearch(struct block *, struct tbl **, const char *, uint32_t);
1948 struct tbl *global(const char *);
1949 struct tbl *local(const char *, bool);
1950 char *str_val(struct tbl *);
1951 int setstr(struct tbl *, const char *, int);
1952 struct tbl *setint_v(struct tbl *, struct tbl *, bool);
1953 void setint(struct tbl *, mksh_ari_t);
1954 void setint_n(struct tbl *, mksh_ari_t, int);
1955 struct tbl *typeset(const char *, uint32_t, uint32_t, int, int);
1956 void unset(struct tbl *, int);
1957 const char *skip_varname(const char *, bool) MKSH_A_PURE;
1958 const char *skip_wdvarname(const char *, bool) MKSH_A_PURE;
1959 int is_wdvarname(const char *, bool) MKSH_A_PURE;
1960 int is_wdvarassign(const char *) MKSH_A_PURE;
1961 struct tbl *arraysearch(struct tbl *, uint32_t);
1962 char **makenv(void);
1963 void change_winsz(void);
1964 size_t array_ref_len(const char *) MKSH_A_PURE;
1965 char *arrayname(const char *);
1966 mksh_uari_t set_array(const char *, bool, const char **);
1967 uint32_t hash(const void *) MKSH_A_PURE;
1968 uint32_t chvt_rndsetup(const void *, size_t) MKSH_A_PURE;
1969 mksh_ari_t rndget(void);
1970 void rndset(unsigned long);
1971 void rndpush(const void *);
1972
1973 enum Test_op {
1974 /* non-operator */
1975 TO_NONOP = 0,
1976 /* unary operators */
1977 TO_STNZE, TO_STZER, TO_OPTION,
1978 TO_FILAXST,
1979 TO_FILEXST,
1980 TO_FILREG, TO_FILBDEV, TO_FILCDEV, TO_FILSYM, TO_FILFIFO, TO_FILSOCK,
1981 TO_FILCDF, TO_FILID, TO_FILGID, TO_FILSETG, TO_FILSTCK, TO_FILUID,
1982 TO_FILRD, TO_FILGZ, TO_FILTT, TO_FILSETU, TO_FILWR, TO_FILEX,
1983 /* binary operators */
1984 TO_STEQL, TO_STNEQ, TO_STLT, TO_STGT, TO_INTEQ, TO_INTNE, TO_INTGT,
1985 TO_INTGE, TO_INTLT, TO_INTLE, TO_FILEQ, TO_FILNT, TO_FILOT,
1986 /* not an operator */
1987 TO_NONNULL /* !TO_NONOP */
1988 };
1989 typedef enum Test_op Test_op;
1990
1991 /* Used by Test_env.isa() (order important - used to index *_tokens[] arrays) */
1992 enum Test_meta {
1993 TM_OR, /* -o or || */
1994 TM_AND, /* -a or && */
1995 TM_NOT, /* ! */
1996 TM_OPAREN, /* ( */
1997 TM_CPAREN, /* ) */
1998 TM_UNOP, /* unary operator */
1999 TM_BINOP, /* binary operator */
2000 TM_END /* end of input */
2001 };
2002 typedef enum Test_meta Test_meta;
2003
2004 #define TEF_ERROR BIT(0) /* set if we've hit an error */
2005 #define TEF_DBRACKET BIT(1) /* set if [[ .. ]] test */
2006
2007 typedef struct test_env {
2008 union {
2009 const char **wp; /* used by ptest_* */
2010 XPtrV *av; /* used by dbtestp_* */
2011 } pos;
2012 const char **wp_end; /* used by ptest_* */
2013 Test_op (*isa)(struct test_env *, Test_meta);
2014 const char *(*getopnd) (struct test_env *, Test_op, bool);
2015 int (*eval)(struct test_env *, Test_op, const char *, const char *, bool);
2016 void (*error)(struct test_env *, int, const char *);
2017 int flags; /* TEF_* */
2018 } Test_env;
2019
2020 extern const char * const dbtest_tokens[];
2021
2022 Test_op test_isop(Test_meta, const char *) MKSH_A_PURE;
2023 int test_eval(Test_env *, Test_op, const char *, const char *, bool);
2024 int test_parse(Test_env *);
2025
2026 /* tty_fd is not opened O_BINARY, it's thus never read/written */
2027 EXTERN int tty_fd E_INIT(-1); /* dup'd tty file descriptor */
2028 EXTERN bool tty_devtty; /* true if tty_fd is from /dev/tty */
2029 EXTERN mksh_ttyst tty_state; /* saved tty state */
2030 EXTERN bool tty_hasstate; /* true if tty_state is valid */
2031
2032 extern int tty_init_fd(void); /* initialise tty_fd, tty_devtty */
2033
2034 /* be sure not to interfere with anyone else's idea about EXTERN */
2035 #ifdef EXTERN_DEFINED
2036 # undef EXTERN_DEFINED
2037 # undef EXTERN
2038 #endif
2039 #undef E_INIT
2040
2041 #endif /* !MKSH_INCLUDES_ONLY */
2042