1 /* $OpenBSD: sh.h,v 1.31 2012/09/10 01:25:30 tedu 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 1.34 2012/06/27 07:17:19 otto 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
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_UNUSED
126 #define MKSH_A_UNUSED __attribute__((__unused__))
127 #else
128 #define MKSH_A_UNUSED /* nothing */
129 #endif
130 #if HAVE_ATTRIBUTE_USED
131 #define MKSH_A_USED __attribute__((__used__))
132 #else
133 #define MKSH_A_USED /* nothing */
134 #endif
135
136 #if defined(MirBSD) && (MirBSD >= 0x09A1) && \
137 defined(__ELF__) && defined(__GNUC__) && \
138 !defined(__llvm__) && !defined(__NWCC__)
139 /*
140 * We got usable __IDSTRING __COPYRIGHT __RCSID __SCCSID macros
141 * which work for all cases; no need to redefine them using the
142 * "portable" macros from below when we might have the "better"
143 * gcc+ELF specific macros or other system dependent ones.
144 */
145 #else
146 #undef __IDSTRING
147 #undef __IDSTRING_CONCAT
148 #undef __IDSTRING_EXPAND
149 #undef __COPYRIGHT
150 #undef __RCSID
151 #undef __SCCSID
152 #define __IDSTRING_CONCAT(l,p) __LINTED__ ## l ## _ ## p
153 #define __IDSTRING_EXPAND(l,p) __IDSTRING_CONCAT(l,p)
154 #ifdef MKSH_DONT_EMIT_IDSTRING
155 #define __IDSTRING(prefix, string) /* nothing */
156 #else
157 #define __IDSTRING(prefix, string) \
158 static const char __IDSTRING_EXPAND(__LINE__,prefix) [] \
159 MKSH_A_USED = "@(""#)" #prefix ": " string
160 #endif
161 #define __COPYRIGHT(x) __IDSTRING(copyright,x)
162 #define __RCSID(x) __IDSTRING(rcsid,x)
163 #define __SCCSID(x) __IDSTRING(sccsid,x)
164 #endif
165
166 #ifdef EXTERN
167 __RCSID("$MirOS: src/bin/mksh/sh.h,v 1.667 2013/08/14 20:26:19 tg Exp $");
168 #endif
169 #define MKSH_VERSION "R48 2013/08/14"
170
171 /* arithmetic types: C implementation */
172 #if !HAVE_CAN_INTTYPES
173 #if !HAVE_CAN_UCBINTS
174 typedef signed int int32_t;
175 typedef unsigned int uint32_t;
176 #else
177 typedef u_int32_t uint32_t;
178 #endif
179 #endif
180
181 /* arithmetic types: shell arithmetics */
182 #ifdef MKSH_LEGACY_MODE
183 /*
184 * POSIX demands these to be the C environment's long type
185 */
186 typedef long mksh_ari_t;
187 typedef unsigned long mksh_uari_t;
188 #else
189 /*
190 * These types are exactly 32 bit wide; signed and unsigned
191 * integer wraparound, even across division and modulo, for
192 * any shell code using them, is guaranteed.
193 */
194 typedef int32_t mksh_ari_t;
195 typedef uint32_t mksh_uari_t;
196 #endif
197
198 /* boolean type (no <stdbool.h> deliberately) */
199 typedef unsigned char mksh_bool;
200 #undef bool
201 /* false MUST equal the same 0 as written by static storage initialisation */
202 #undef false
203 #undef true
204 /* access macros for boolean type */
205 #define bool mksh_bool
206 /* values must have identity mapping between mksh_bool and short */
207 #define false 0
208 #define true 1
209 /* make any-type into bool or short */
210 #define tobool(cond) ((cond) ? true : false)
211
212 /* char (octet) type: C implementation */
213 #if !HAVE_CAN_INT8TYPE
214 #if !HAVE_CAN_UCBINT8
215 typedef unsigned char uint8_t;
216 #else
217 typedef u_int8_t uint8_t;
218 #endif
219 #endif
220
221 /* other standard types */
222
223 #if !HAVE_RLIM_T
224 typedef unsigned long rlim_t;
225 #endif
226
227 #if !HAVE_SIG_T
228 #undef sig_t
229 typedef void (*sig_t)(int);
230 #endif
231
232 #ifdef MKSH_TYPEDEF_SIG_ATOMIC_T
233 typedef MKSH_TYPEDEF_SIG_ATOMIC_T sig_atomic_t;
234 #endif
235
236 #ifdef MKSH_TYPEDEF_SSIZE_T
237 typedef MKSH_TYPEDEF_SSIZE_T ssize_t;
238 #endif
239
240 /* un-do vendor damage */
241
242 #undef BAD /* AIX defines that somewhere */
243 #undef PRINT /* LynxOS defines that somewhere */
244 #undef flock /* SCO UnixWare defines that to flock64 but ENOENT */
245
246
247 #ifndef MKSH_INCLUDES_ONLY
248
249 /* extra types */
250
251 #if !HAVE_GETRUSAGE
252 #undef rusage
253 #undef RUSAGE_SELF
254 #undef RUSAGE_CHILDREN
255 #define rusage mksh_rusage
256 #define RUSAGE_SELF 0
257 #define RUSAGE_CHILDREN -1
258
259 struct rusage {
260 struct timeval ru_utime;
261 struct timeval ru_stime;
262 };
263 #endif
264
265 /* extra macros */
266
267 #ifndef timerclear
268 #define timerclear(tvp) \
269 do { \
270 (tvp)->tv_sec = (tvp)->tv_usec = 0; \
271 } while (/* CONSTCOND */ 0)
272 #endif
273 #ifndef timeradd
274 #define timeradd(tvp, uvp, vvp) \
275 do { \
276 (vvp)->tv_sec = (tvp)->tv_sec + (uvp)->tv_sec; \
277 (vvp)->tv_usec = (tvp)->tv_usec + (uvp)->tv_usec; \
278 if ((vvp)->tv_usec >= 1000000) { \
279 (vvp)->tv_sec++; \
280 (vvp)->tv_usec -= 1000000; \
281 } \
282 } while (/* CONSTCOND */ 0)
283 #endif
284 #ifndef timersub
285 #define timersub(tvp, uvp, vvp) \
286 do { \
287 (vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec; \
288 (vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec; \
289 if ((vvp)->tv_usec < 0) { \
290 (vvp)->tv_sec--; \
291 (vvp)->tv_usec += 1000000; \
292 } \
293 } while (/* CONSTCOND */ 0)
294 #endif
295
296 #define ksh_isdigit(c) (((c) >= '0') && ((c) <= '9'))
297 #define ksh_islower(c) (((c) >= 'a') && ((c) <= 'z'))
298 #define ksh_isupper(c) (((c) >= 'A') && ((c) <= 'Z'))
299 #define ksh_tolower(c) (((c) >= 'A') && ((c) <= 'Z') ? (c) - 'A' + 'a' : (c))
300 #define ksh_toupper(c) (((c) >= 'a') && ((c) <= 'z') ? (c) - 'a' + 'A' : (c))
301 #define ksh_isdash(s) (((s) != NULL) && ((s)[0] == '-') && ((s)[1] == '\0'))
302 #define ksh_isspace(c) ((((c) >= 0x09) && ((c) <= 0x0D)) || ((c) == 0x20))
303 #define ksh_min(x,y) ((x) < (y) ? (x) : (y))
304 #define ksh_max(x,y) ((x) > (y) ? (x) : (y))
305
306 #ifdef MKSH__NO_PATH_MAX
307 #undef PATH_MAX
308 #else
309 #ifndef PATH_MAX
310 #define PATH_MAX 1024
311 #endif
312 #endif
313 #ifndef SIZE_MAX
314 #ifdef SIZE_T_MAX
315 #define SIZE_MAX SIZE_T_MAX
316 #else
317 #define SIZE_MAX ((size_t)-1)
318 #endif
319 #endif
320 #ifndef S_ISLNK
321 #define S_ISLNK(m) ((m & 0170000) == 0120000)
322 #endif
323 #ifndef S_ISSOCK
324 #define S_ISSOCK(m) ((m & 0170000) == 0140000)
325 #endif
326 #if !defined(S_ISCDF) && defined(S_CDF)
327 #define S_ISCDF(m) (S_ISDIR(m) && ((m) & S_CDF))
328 #endif
329 #ifndef DEFFILEMODE
330 #define DEFFILEMODE (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
331 #endif
332
333 #ifndef NSIG
334 #if defined(_NSIG)
335 #define NSIG _NSIG
336 #elif defined(SIGMAX)
337 #define NSIG (SIGMAX+1)
338 #elif defined(_SIGMAX)
339 #define NSIG (_SIGMAX+1)
340 #endif
341 #endif
342
343
344 /* OS-dependent additions (functions, variables, by OS) */
345
346 #if !HAVE_FLOCK_DECL
347 extern int flock(int, int);
348 #endif
349
350 #if !HAVE_GETTIMEOFDAY
351 #define mksh_TIME(tv) do { \
352 (tv).tv_usec = 0; \
353 (tv).tv_sec = time(NULL); \
354 } while (/* CONSTCOND */ 0)
355 #else
356 #define mksh_TIME(tv) gettimeofday(&(tv), NULL)
357 #endif
358
359 #if !HAVE_GETRUSAGE
360 extern int getrusage(int, struct rusage *);
361 #endif
362
363 #if !HAVE_MEMMOVE
364 /* we assume either memmove or bcopy exist, at the moment */
365 #define memmove(dst, src, len) bcopy((src), (dst), (len))
366 #endif
367
368 #if !HAVE_REVOKE_DECL
369 extern int revoke(const char *);
370 #endif
371
372 #if defined(DEBUG) || !HAVE_STRERROR
373 #undef strerror
374 #define strerror /* poisoned */ dontuse_strerror
375 #define cstrerror /* replaced */ cstrerror
376 extern const char *cstrerror(int);
377 #else
378 #define cstrerror(errnum) ((const char *)strerror(errnum))
379 #endif
380
381 #if !HAVE_STRLCPY
382 size_t strlcpy(char *, const char *, size_t);
383 #endif
384
385 #ifdef __INTERIX
386 /* XXX imake style */
387 #define makedev mkdev
388 extern int __cdecl seteuid(uid_t);
389 extern int __cdecl setegid(gid_t);
390 #endif
391
392 #if defined(__COHERENT__)
393 #ifndef O_ACCMODE
394 /* this need not work everywhere, take care */
395 #define O_ACCMODE (O_RDONLY | O_WRONLY | O_RDWR)
396 #endif
397 #endif
398
399 #ifdef MKSH__NO_SYMLINK
400 #undef S_ISLNK
401 #define S_ISLNK(m) (/* CONSTCOND */ 0)
402 #define mksh_lstat stat
403 #else
404 #define mksh_lstat lstat
405 #endif
406
407 #if HAVE_TERMIOS_H
408 #define mksh_ttyst struct termios
409 #define mksh_tcget(fd,st) tcgetattr((fd), (st))
410 #define mksh_tcset(fd,st) tcsetattr((fd), TCSADRAIN, (st))
411 #else
412 #define mksh_ttyst struct termio
413 #define mksh_tcget(fd,st) ioctl((fd), TCGETA, (st))
414 #define mksh_tcset(fd,st) ioctl((fd), TCSETAW, (st))
415 #endif
416
417 /* remove redundancies */
418
419 #if defined(MirBSD) && (MirBSD >= 0x0AB3) && !defined(MKSH_OPTSTATIC)
420 #define MKSH_mirbsd_wcwidth
421 #define utf_wcwidth(i) wcwidth((__WCHAR_TYPE__)i)
422 extern int wcwidth(__WCHAR_TYPE__);
423 #endif
424
425
426 /* some useful #defines */
427 #ifdef EXTERN
428 # define E_INIT(i) = i
429 #else
430 # define E_INIT(i)
431 # define EXTERN extern
432 # define EXTERN_DEFINED
433 #endif
434
435 /* define bit in flag */
436 #define BIT(i) (1 << (i))
437 #define NELEM(a) (sizeof(a) / sizeof((a)[0]))
438
439 /*
440 * Make MAGIC a char that might be printed to make bugs more obvious, but
441 * not a char that is used often. Also, can't use the high bit as it causes
442 * portability problems (calling strchr(x, 0x80 | 'x') is error prone).
443 */
444 #define MAGIC (7) /* prefix for *?[!{,} during expand */
445 #define ISMAGIC(c) ((unsigned char)(c) == MAGIC)
446
447 EXTERN const char *safe_prompt; /* safe prompt if PS1 substitution fails */
448
449 #ifdef MKSH_LEGACY_MODE
450 #define KSH_VERSIONNAME "LEGACY"
451 #else
452 #define KSH_VERSIONNAME "MIRBSD"
453 #endif
454 EXTERN const char initvsn[] E_INIT("KSH_VERSION=@(#)" KSH_VERSIONNAME \
455 " KSH " MKSH_VERSION);
456 #define KSH_VERSION (initvsn + /* "KSH_VERSION=@(#)" */ 16)
457
458 EXTERN const char digits_uc[] E_INIT("0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ");
459 EXTERN const char digits_lc[] E_INIT("0123456789abcdefghijklmnopqrstuvwxyz");
460
461 /*
462 * Evil hack for const correctness due to API brokenness
463 */
464 union mksh_cchack {
465 char *rw;
466 const char *ro;
467 };
468 union mksh_ccphack {
469 char **rw;
470 const char **ro;
471 };
472
473 /*
474 * Evil hack since casting uint to sint is implementation-defined
475 */
476 typedef union {
477 mksh_ari_t i;
478 mksh_uari_t u;
479 } mksh_ari_u;
480
481 /* for const debugging */
482 #if defined(DEBUG) && defined(__GNUC__) && !defined(__ICC) && \
483 !defined(__INTEL_COMPILER) && !defined(__SUNPRO_C)
484 char *ucstrchr(char *, int);
485 char *ucstrstr(char *, const char *);
486 #undef strchr
487 #define strchr ucstrchr
488 #define strstr ucstrstr
489 #define cstrchr(s,c) ({ \
490 union mksh_cchack in, out; \
491 \
492 in.ro = (s); \
493 out.rw = ucstrchr(in.rw, (c)); \
494 (out.ro); \
495 })
496 #define cstrstr(b,l) ({ \
497 union mksh_cchack in, out; \
498 \
499 in.ro = (b); \
500 out.rw = ucstrstr(in.rw, (l)); \
501 (out.ro); \
502 })
503 #define vstrchr(s,c) (cstrchr((s), (c)) != NULL)
504 #define vstrstr(b,l) (cstrstr((b), (l)) != NULL)
505 #else /* !DEBUG, !gcc */
506 #define cstrchr(s,c) ((const char *)strchr((s), (c)))
507 #define cstrstr(s,c) ((const char *)strstr((s), (c)))
508 #define vstrchr(s,c) (strchr((s), (c)) != NULL)
509 #define vstrstr(b,l) (strstr((b), (l)) != NULL)
510 #endif
511
512 #if defined(DEBUG) || defined(__COVERITY__)
513 #define mkssert(e) do { if (!(e)) exit(255); } while (/* CONSTCOND */ 0)
514 #ifndef DEBUG_LEAKS
515 #define DEBUG_LEAKS
516 #endif
517 #else
518 #define mkssert(e) do { } while (/* CONSTCOND */ 0)
519 #endif
520
521 #if (!defined(MKSH_BUILDMAKEFILE4BSD) && !defined(MKSH_BUILDSH)) || (MKSH_BUILD_R != 481)
522 #error Must run Build.sh to compile this.
523 extern void thiswillneverbedefinedIhope(void);
524 int
im_sorry_dave(void)525 im_sorry_dave(void)
526 {
527 /* I’m sorry, Dave. I’m afraid I can’t do that. */
528 return (thiswillneverbedefinedIhope());
529 }
530 #endif
531
532 /* use this ipv strchr(s, 0) but no side effects in s! */
533 #define strnul(s) ((s) + strlen(s))
534
535 #define utf_ptradjx(src, dst) do { \
536 (dst) = (src) + utf_ptradj(src); \
537 } while (/* CONSTCOND */ 0)
538
539 #if defined(MKSH_SMALL) && !defined(MKSH_SMALL_BUT_FAST)
540 #define strdupx(d, s, ap) do { \
541 (d) = strdup_i((s), (ap)); \
542 } while (/* CONSTCOND */ 0)
543 #define strndupx(d, s, n, ap) do { \
544 (d) = strndup_i((s), (n), (ap)); \
545 } while (/* CONSTCOND */ 0)
546 #else
547 /* be careful to evaluate arguments only once! */
548 #define strdupx(d, s, ap) do { \
549 const char *strdup_src = (s); \
550 char *strdup_dst = NULL; \
551 \
552 if (strdup_src != NULL) { \
553 size_t strdup_len = strlen(strdup_src) + 1; \
554 strdup_dst = alloc(strdup_len, (ap)); \
555 memcpy(strdup_dst, strdup_src, strdup_len); \
556 } \
557 (d) = strdup_dst; \
558 } while (/* CONSTCOND */ 0)
559 #define strndupx(d, s, n, ap) do { \
560 const char *strdup_src = (s); \
561 char *strdup_dst = NULL; \
562 \
563 if (strdup_src != NULL) { \
564 size_t strndup_len = (n); \
565 strdup_dst = alloc(strndup_len + 1, (ap)); \
566 memcpy(strdup_dst, strdup_src, strndup_len); \
567 strdup_dst[strndup_len] = '\0'; \
568 } \
569 (d) = strdup_dst; \
570 } while (/* CONSTCOND */ 0)
571 #endif
572
573 #ifdef MKSH_LEGACY_MODE
574 #ifndef MKSH_NO_CMDLINE_EDITING
575 #define MKSH_NO_CMDLINE_EDITING /* defined */
576 #endif
577 #ifndef MKSH_CONSERVATIVE_FDS
578 #define MKSH_CONSERVATIVE_FDS /* defined */
579 #endif
580 #undef MKSH_S_NOVI
581 #define MKSH_S_NOVI 1
582 #endif
583
584 #ifdef MKSH_SMALL
585 #ifndef MKSH_CONSERVATIVE_FDS
586 #define MKSH_CONSERVATIVE_FDS /* defined */
587 #endif
588 #ifndef MKSH_NOPWNAM
589 #define MKSH_NOPWNAM /* defined */
590 #endif
591 #ifndef MKSH_S_NOVI
592 #define MKSH_S_NOVI 1
593 #endif
594 #endif
595
596 #ifndef MKSH_S_NOVI
597 #define MKSH_S_NOVI 0
598 #endif
599
600 #if defined(MKSH_NOPROSPECTOFWORK) && !defined(MKSH_UNEMPLOYED)
601 #define MKSH_UNEMPLOYED 1
602 #endif
603
604 /* these shall be smaller than 100 */
605 #ifdef MKSH_CONSERVATIVE_FDS
606 #define NUFILE 32 /* Number of user-accessible files */
607 #define FDBASE 10 /* First file usable by Shell */
608 #else
609 #define NUFILE 56 /* Number of user-accessible files */
610 #define FDBASE 24 /* First file usable by Shell */
611 #endif
612
613 /*
614 * simple grouping allocator
615 */
616
617
618 /* 0. OS API: where to get memory from and how to free it (grouped) */
619
620 /* malloc(3)/realloc(3) -> free(3) for use by the memory allocator */
621 #define malloc_osi(sz) malloc(sz)
622 #define realloc_osi(p,sz) realloc((p), (sz))
623 #define free_osimalloc(p) free(p)
624
625 /* malloc(3)/realloc(3) -> free(3) for use by mksh code */
626 #define malloc_osfunc(sz) malloc(sz)
627 #define realloc_osfunc(p,sz) realloc((p), (sz))
628 #define free_osfunc(p) free(p)
629
630 #if HAVE_MKNOD
631 /* setmode(3) -> free(3) */
632 #define free_ossetmode(p) free(p)
633 #endif
634
635 #ifdef MKSH__NO_PATH_MAX
636 /* GNU libc: get_current_dir_name(3) -> free(3) */
637 #define free_gnu_gcdn(p) free(p)
638 #endif
639
640
641 /* 1. internal structure */
642 struct lalloc {
643 struct lalloc *next;
644 };
645
646 /* 2. sizes */
647 #define ALLOC_ITEM struct lalloc
648 #define ALLOC_SIZE (sizeof(ALLOC_ITEM))
649
650 /* 3. group structure (only the same for lalloc.c) */
651 typedef struct lalloc Area;
652
653
654 EXTERN Area aperm; /* permanent object space */
655 #define APERM &aperm
656 #define ATEMP &e->area
657
658 /*
659 * flags (the order of these enums MUST match the order in misc.c(options[]))
660 */
661 enum sh_flag {
662 #define SHFLAGS_ENUMS
663 #include "sh_flags.h"
664 FNFLAGS /* (place holder: how many flags are there) */
665 };
666
667 #define Flag(f) (shell_flags[(int)(f)])
668 #define UTFMODE Flag(FUNICODE)
669
670 /*
671 * parsing & execution environment
672 *
673 * note that kshlongjmp MUST NOT be passed 0 as second argument!
674 */
675 #ifdef MKSH_NO_SIGSETJMP
676 #define kshjmp_buf jmp_buf
677 #define kshsetjmp(jbuf) _setjmp(jbuf)
678 #define kshlongjmp _longjmp
679 #else
680 #define kshjmp_buf sigjmp_buf
681 #define kshsetjmp(jbuf) sigsetjmp((jbuf), 0)
682 #define kshlongjmp siglongjmp
683 #endif
684
685 struct sretrace_info;
686 struct yyrecursive_state;
687
688 EXTERN struct sretrace_info *retrace_info E_INIT(NULL);
689 EXTERN int subshell_nesting_type E_INIT(0);
690
691 extern struct env {
692 ALLOC_ITEM alloc_INT; /* internal, do not touch */
693 Area area; /* temporary allocation area */
694 struct env *oenv; /* link to previous environment */
695 struct block *loc; /* local variables and functions */
696 short *savefd; /* original redirected fds */
697 struct temp *temps; /* temp files */
698 /* saved parser recursion state */
699 struct yyrecursive_state *yyrecursive_statep;
700 kshjmp_buf jbuf; /* long jump back to env creator */
701 uint8_t type; /* environment type - see below */
702 uint8_t flags; /* EF_* */
703 } *e;
704
705 /* struct env.type values */
706 #define E_NONE 0 /* dummy environment */
707 #define E_PARSE 1 /* parsing command # */
708 #define E_FUNC 2 /* executing function # */
709 #define E_INCL 3 /* including a file via . # */
710 #define E_EXEC 4 /* executing command tree */
711 #define E_LOOP 5 /* executing for/while # */
712 #define E_ERRH 6 /* general error handler # */
713 #define E_GONE 7 /* hidden in child */
714 /* # indicates env has valid jbuf (see unwind()) */
715
716 /* struct env.flag values */
717 #define EF_BRKCONT_PASS BIT(1) /* set if E_LOOP must pass break/continue on */
718 #define EF_FAKE_SIGDIE BIT(2) /* hack to get info from unwind to quitenv */
719
720 /* Do breaks/continues stop at env type e? */
721 #define STOP_BRKCONT(t) ((t) == E_NONE || (t) == E_PARSE || \
722 (t) == E_FUNC || (t) == E_INCL)
723 /* Do returns stop at env type e? */
724 #define STOP_RETURN(t) ((t) == E_FUNC || (t) == E_INCL)
725
726 /* values for kshlongjmp(e->jbuf, i) */
727 /* note that i MUST NOT be zero */
728 #define LRETURN 1 /* return statement */
729 #define LEXIT 2 /* exit statement */
730 #define LERROR 3 /* errorf() called */
731 #define LLEAVE 4 /* untrappable exit/error */
732 #define LINTR 5 /* ^C noticed */
733 #define LBREAK 6 /* break statement */
734 #define LCONTIN 7 /* continue statement */
735 #define LSHELL 8 /* return to interactive shell() */
736 #define LAEXPR 9 /* error in arithmetic expression */
737
738 /* sort of shell global state */
739 EXTERN pid_t procpid; /* PID of executing process */
740 EXTERN int exstat; /* exit status */
741 EXTERN int subst_exstat; /* exit status of last $(..)/`..` */
742 EXTERN struct tbl *vp_pipest; /* global PIPESTATUS array */
743 EXTERN short trap_exstat; /* exit status before running a trap */
744 EXTERN uint8_t trap_nested; /* running nested traps */
745 EXTERN uint8_t shell_flags[FNFLAGS];
746 EXTERN const char *kshname; /* $0 */
747 EXTERN struct {
748 uid_t kshuid_v; /* real UID of shell */
749 uid_t ksheuid_v; /* effective UID of shell */
750 gid_t kshgid_v; /* real GID of shell */
751 gid_t kshegid_v; /* effective GID of shell */
752 pid_t kshpgrp_v; /* process group of shell */
753 pid_t kshppid_v; /* PID of parent of shell */
754 pid_t kshpid_v; /* $$, shell PID */
755 } rndsetupstate;
756
757 #define kshpid rndsetupstate.kshpid_v
758 #define kshpgrp rndsetupstate.kshpgrp_v
759 #define kshuid rndsetupstate.kshuid_v
760 #define ksheuid rndsetupstate.ksheuid_v
761 #define kshgid rndsetupstate.kshgid_v
762 #define kshegid rndsetupstate.kshegid_v
763 #define kshppid rndsetupstate.kshppid_v
764
765
766 /* option processing */
767 #define OF_CMDLINE 0x01 /* command line */
768 #define OF_SET 0x02 /* set builtin */
769 #define OF_SPECIAL 0x04 /* a special variable changing */
770 #define OF_INTERNAL 0x08 /* set internally by shell */
771 #define OF_FIRSTTIME 0x10 /* as early as possible, once */
772 #define OF_ANY (OF_CMDLINE | OF_SET | OF_SPECIAL | OF_INTERNAL)
773
774 /* null value for variable; comparison pointer for unset */
775 EXTERN char null[] E_INIT("");
776 /* helpers for string pooling */
777 EXTERN const char Tintovfl[] E_INIT("integer overflow %zu %c %zu prevented");
778 EXTERN const char Toomem[] E_INIT("can't allocate %zu data bytes");
779 #if defined(__GNUC__)
780 /* trust this to have string pooling; -Wformat bitches otherwise */
781 #define Tsynerr "syntax error"
782 #else
783 EXTERN const char Tsynerr[] E_INIT("syntax error");
784 #endif
785 EXTERN const char Tselect[] E_INIT("select");
786 EXTERN const char Tr_fc_e_dash[] E_INIT("r=fc -e -");
787 #define Tfc_e_dash (Tr_fc_e_dash + 2) /* "fc -e -" */
788 #define Zfc_e_dash 7 /* strlen(Tfc_e_dash) */
789 EXTERN const char Tlocal_typeset[] E_INIT("local=typeset");
790 #define T_typeset (Tlocal_typeset + 5) /* "=typeset" */
791 #define Ttypeset (Tlocal_typeset + 6) /* "typeset" */
792 EXTERN const char Talias[] E_INIT("alias");
793 EXTERN const char Tunalias[] E_INIT("unalias");
794 EXTERN const char Tsgset[] E_INIT("*=set");
795 #define Tset (Tsgset + 2) /* "set" */
796 EXTERN const char Tsgunset[] E_INIT("*=unset");
797 #define Tunset (Tsgunset + 2) /* "unset" */
798 EXTERN const char Tsgexport[] E_INIT("*=export");
799 #define Texport (Tsgexport + 2) /* "export" */
800 EXTERN const char Tsgreadonly[] E_INIT("*=readonly");
801 #define Treadonly (Tsgreadonly + 2) /* "readonly" */
802 EXTERN const char Tgbuiltin[] E_INIT("=builtin");
803 #define Tbuiltin (Tgbuiltin + 1) /* "builtin" */
804 EXTERN const char T_function[] E_INIT(" function");
805 #define Tfunction (T_function + 1) /* "function" */
806 EXTERN const char TC_LEX1[] E_INIT("|&;<>() \t\n");
807 #define TC_IFSWS (TC_LEX1 + 7) /* space tab newline */
808
809 typedef uint8_t Temp_type;
810 /* expanded heredoc */
811 #define TT_HEREDOC_EXP 0
812 /* temporary file used for history editing (fc -e) */
813 #define TT_HIST_EDIT 1
814 /* temporary file used during in-situ command substitution */
815 #define TT_FUNSUB 2
816
817 /* temp/heredoc files. The file is removed when the struct is freed. */
818 struct temp {
819 struct temp *next;
820 struct shf *shf;
821 /* pid of process parsed here-doc */
822 pid_t pid;
823 Temp_type type;
824 /* actually longer: name (variable length) */
825 char tffn[3];
826 };
827
828 /*
829 * stdio and our IO routines
830 */
831
832 #define shl_xtrace (&shf_iob[0]) /* for set -x */
833 #define shl_stdout (&shf_iob[1])
834 #define shl_out (&shf_iob[2])
835 #ifdef DF
836 #define shl_dbg (&shf_iob[3]) /* for DF() */
837 #endif
838 EXTERN bool shl_stdout_ok;
839
840 /*
841 * trap handlers
842 */
843 typedef struct trap {
844 const char *name; /* short name */
845 const char *mess; /* descriptive name */
846 char *trap; /* trap command */
847 sig_t cursig; /* current handler (valid if TF_ORIG_* set) */
848 sig_t shtrap; /* shell signal handler */
849 int signal; /* signal number */
850 int flags; /* TF_* */
851 volatile sig_atomic_t set; /* trap pending */
852 } Trap;
853
854 /* values for Trap.flags */
855 #define TF_SHELL_USES BIT(0) /* shell uses signal, user can't change */
856 #define TF_USER_SET BIT(1) /* user has (tried to) set trap */
857 #define TF_ORIG_IGN BIT(2) /* original action was SIG_IGN */
858 #define TF_ORIG_DFL BIT(3) /* original action was SIG_DFL */
859 #define TF_EXEC_IGN BIT(4) /* restore SIG_IGN just before exec */
860 #define TF_EXEC_DFL BIT(5) /* restore SIG_DFL just before exec */
861 #define TF_DFL_INTR BIT(6) /* when received, default action is LINTR */
862 #define TF_TTY_INTR BIT(7) /* tty generated signal (see j_waitj) */
863 #define TF_CHANGED BIT(8) /* used by runtrap() to detect trap changes */
864 #define TF_FATAL BIT(9) /* causes termination if not trapped */
865
866 /* values for setsig()/setexecsig() flags argument */
867 #define SS_RESTORE_MASK 0x3 /* how to restore a signal before an exec() */
868 #define SS_RESTORE_CURR 0 /* leave current handler in place */
869 #define SS_RESTORE_ORIG 1 /* restore original handler */
870 #define SS_RESTORE_DFL 2 /* restore to SIG_DFL */
871 #define SS_RESTORE_IGN 3 /* restore to SIG_IGN */
872 #define SS_FORCE BIT(3) /* set signal even if original signal ignored */
873 #define SS_USER BIT(4) /* user is doing the set (ie, trap command) */
874 #define SS_SHTRAP BIT(5) /* trap for internal use (ALRM, CHLD, WINCH) */
875
876 #define ksh_SIGEXIT 0 /* for trap EXIT */
877 #define ksh_SIGERR NSIG /* for trap ERR */
878
879 EXTERN volatile sig_atomic_t trap; /* traps pending? */
880 EXTERN volatile sig_atomic_t intrsig; /* pending trap interrupts command */
881 EXTERN volatile sig_atomic_t fatal_trap; /* received a fatal signal */
882 extern Trap sigtraps[NSIG+1];
883
884 /* got_winch = 1 when we need to re-adjust the window size */
885 #ifdef SIGWINCH
886 EXTERN volatile sig_atomic_t got_winch E_INIT(1);
887 #else
888 #define got_winch true
889 #endif
890
891 /*
892 * TMOUT support
893 */
894 /* values for ksh_tmout_state */
895 enum tmout_enum {
896 TMOUT_EXECUTING = 0, /* executing commands */
897 TMOUT_READING, /* waiting for input */
898 TMOUT_LEAVING /* have timed out */
899 };
900 EXTERN unsigned int ksh_tmout;
901 EXTERN enum tmout_enum ksh_tmout_state E_INIT(TMOUT_EXECUTING);
902
903 /* For "You have stopped jobs" message */
904 EXTERN bool really_exit;
905
906 /*
907 * fast character classes
908 */
909 #define C_ALPHA BIT(0) /* a-z_A-Z */
910 #define C_DIGIT BIT(1) /* 0-9 */
911 #define C_LEX1 BIT(2) /* \t \n\0|&;<>() */
912 #define C_VAR1 BIT(3) /* *@#!$-? */
913 #define C_IFSWS BIT(4) /* \t \n (IFS white space) */
914 #define C_SUBOP1 BIT(5) /* "=-+?" */
915 #define C_QUOTE BIT(6) /* \t\n "#$&'()*;<=>?[\]`| (needing quoting) */
916 #define C_IFS BIT(7) /* $IFS */
917 #define C_SUBOP2 BIT(8) /* "#%" (magic, see below) */
918
919 extern unsigned char chtypes[];
920
921 #define ctype(c, t) tobool( ((t) == C_SUBOP2) ? \
922 (((c) == '#' || (c) == '%') ? 1 : 0) : \
923 (chtypes[(unsigned char)(c)] & (t)) )
924 #define ksh_isalphx(c) ctype((c), C_ALPHA)
925 #define ksh_isalnux(c) ctype((c), C_ALPHA | C_DIGIT)
926
927 EXTERN int ifs0 E_INIT(' '); /* for "$*" */
928
929 /* Argument parsing for built-in commands and getopts command */
930
931 /* Values for Getopt.flags */
932 #define GF_ERROR BIT(0) /* call errorf() if there is an error */
933 #define GF_PLUSOPT BIT(1) /* allow +c as an option */
934 #define GF_NONAME BIT(2) /* don't print argv[0] in errors */
935
936 /* Values for Getopt.info */
937 #define GI_MINUS BIT(0) /* an option started with -... */
938 #define GI_PLUS BIT(1) /* an option started with +... */
939 #define GI_MINUSMINUS BIT(2) /* arguments were ended with -- */
940
941 /* in case some OS defines these */
942 #undef optarg
943 #undef optind
944
945 typedef struct {
946 const char *optarg;
947 int optind;
948 int uoptind; /* what user sees in $OPTIND */
949 int flags; /* see GF_* */
950 int info; /* see GI_* */
951 unsigned int p; /* 0 or index into argv[optind - 1] */
952 char buf[2]; /* for bad option OPTARG value */
953 } Getopt;
954
955 EXTERN Getopt builtin_opt; /* for shell builtin commands */
956 EXTERN Getopt user_opt; /* parsing state for getopts builtin command */
957
958 /* This for co-processes */
959
960 /* something that won't (realisticly) wrap */
961 typedef int32_t Coproc_id;
962
963 struct coproc {
964 void *job; /* 0 or job of co-process using input pipe */
965 int read; /* pipe from co-process's stdout */
966 int readw; /* other side of read (saved temporarily) */
967 int write; /* pipe to co-process's stdin */
968 int njobs; /* number of live jobs using output pipe */
969 Coproc_id id; /* id of current output pipe */
970 };
971 EXTERN struct coproc coproc;
972
973 #ifndef MKSH_NOPROSPECTOFWORK
974 /* used in jobs.c and by coprocess stuff in exec.c and select() calls */
975 EXTERN sigset_t sm_default, sm_sigchld;
976 #endif
977
978 /* name of called builtin function (used by error functions) */
979 EXTERN const char *builtin_argv0;
980 /* flags of called builtin (SPEC_BI, etc.) */
981 EXTERN uint32_t builtin_flag;
982
983 /* current working directory */
984 EXTERN char *current_wd;
985
986 /* input line size */
987 #define LINE (4096 - ALLOC_SIZE)
988 /*
989 * Minimum required space to work with on a line - if the prompt leaves
990 * less space than this on a line, the prompt is truncated.
991 */
992 #define MIN_EDIT_SPACE 7
993 /*
994 * Minimum allowed value for x_cols: 2 for prompt, 3 for " < " at end of line
995 */
996 #define MIN_COLS (2 + MIN_EDIT_SPACE + 3)
997 #define MIN_LINS 3
998 EXTERN mksh_ari_t x_cols E_INIT(80); /* tty columns */
999 EXTERN mksh_ari_t x_lins E_INIT(24); /* tty lines */
1000
1001
1002 /* Determine the location of the system (common) profile */
1003
1004 #ifndef MKSH_DEFAULT_PROFILEDIR
1005 #if defined(ANDROID)
1006 #define MKSH_DEFAULT_PROFILEDIR "/system/etc"
1007 #else
1008 #define MKSH_DEFAULT_PROFILEDIR "/etc"
1009 #endif
1010 #endif
1011
1012 #define MKSH_SYSTEM_PROFILE MKSH_DEFAULT_PROFILEDIR "/profile"
1013 #define MKSH_SUID_PROFILE MKSH_DEFAULT_PROFILEDIR "/suid_profile"
1014
1015
1016 /* Used by v_evaluate() and setstr() to control action when error occurs */
1017 #define KSH_UNWIND_ERROR 0 /* unwind the stack (kshlongjmp) */
1018 #define KSH_RETURN_ERROR 1 /* return 1/0 for success/failure */
1019
1020 /*
1021 * Shell file I/O routines
1022 */
1023
1024 #define SHF_BSIZE 512
1025
1026 #define shf_fileno(shf) ((shf)->fd)
1027 #define shf_setfileno(shf,nfd) ((shf)->fd = (nfd))
1028 #define shf_getc_i(shf) ((shf)->rnleft > 0 ? \
1029 (shf)->rnleft--, *(shf)->rp++ : \
1030 shf_getchar(shf))
1031 #define shf_putc_i(c, shf) ((shf)->wnleft == 0 ? \
1032 shf_putchar((c), (shf)) : \
1033 ((shf)->wnleft--, *(shf)->wp++ = (c)))
1034 #define shf_eof(shf) ((shf)->flags & SHF_EOF)
1035 #define shf_error(shf) ((shf)->flags & SHF_ERROR)
1036 #define shf_errno(shf) ((shf)->errnosv)
1037 #define shf_clearerr(shf) ((shf)->flags &= ~(SHF_EOF | SHF_ERROR))
1038
1039 /* Flags passed to shf_*open() */
1040 #define SHF_RD 0x0001
1041 #define SHF_WR 0x0002
1042 #define SHF_RDWR (SHF_RD|SHF_WR)
1043 #define SHF_ACCMODE 0x0003 /* mask */
1044 #define SHF_GETFL 0x0004 /* use fcntl() to figure RD/WR flags */
1045 #define SHF_UNBUF 0x0008 /* unbuffered I/O */
1046 #define SHF_CLEXEC 0x0010 /* set close on exec flag */
1047 #define SHF_MAPHI 0x0020 /* make fd > FDBASE (and close orig)
1048 * (shf_open() only) */
1049 #define SHF_DYNAMIC 0x0040 /* string: increase buffer as needed */
1050 #define SHF_INTERRUPT 0x0080 /* EINTR in read/write causes error */
1051 /* Flags used internally */
1052 #define SHF_STRING 0x0100 /* a string, not a file */
1053 #define SHF_ALLOCS 0x0200 /* shf and shf->buf were alloc()ed */
1054 #define SHF_ALLOCB 0x0400 /* shf->buf was alloc()ed */
1055 #define SHF_ERROR 0x0800 /* read()/write() error */
1056 #define SHF_EOF 0x1000 /* read eof (sticky) */
1057 #define SHF_READING 0x2000 /* currently reading: rnleft,rp valid */
1058 #define SHF_WRITING 0x4000 /* currently writing: wnleft,wp valid */
1059
1060
1061 struct shf {
1062 Area *areap; /* area shf/buf were allocated in */
1063 unsigned char *rp; /* read: current position in buffer */
1064 unsigned char *wp; /* write: current position in buffer */
1065 unsigned char *buf; /* buffer */
1066 ssize_t bsize; /* actual size of buf */
1067 ssize_t rbsize; /* size of buffer (1 if SHF_UNBUF) */
1068 ssize_t rnleft; /* read: how much data left in buffer */
1069 ssize_t wbsize; /* size of buffer (0 if SHF_UNBUF) */
1070 ssize_t wnleft; /* write: how much space left in buffer */
1071 int flags; /* see SHF_* */
1072 int fd; /* file descriptor */
1073 int errnosv; /* saved value of errno after error */
1074 };
1075
1076 extern struct shf shf_iob[];
1077
1078 struct table {
1079 Area *areap; /* area to allocate entries */
1080 struct tbl **tbls; /* hashed table items */
1081 size_t nfree; /* free table entries */
1082 uint8_t tshift; /* table size (2^tshift) */
1083 };
1084
1085 /* table item */
1086 struct tbl {
1087 /* Area to allocate from */
1088 Area *areap;
1089 /* value */
1090 union {
1091 char *s; /* string */
1092 mksh_ari_t i; /* integer */
1093 mksh_uari_t u; /* unsigned integer */
1094 int (*f)(const char **); /* built-in command */
1095 struct op *t; /* "function" tree */
1096 } val;
1097 union {
1098 struct tbl *array; /* array values */
1099 const char *fpath; /* temporary path to undef function */
1100 } u;
1101 union {
1102 int field; /* field with for -L/-R/-Z */
1103 int errnov; /* CEXEC/CTALIAS */
1104 } u2;
1105 union {
1106 uint32_t hval; /* hash(name) */
1107 uint32_t index; /* index for an array */
1108 } ua;
1109 /*
1110 * command type (see below), base (if INTEGER),
1111 * offset from val.s of value (if EXPORT)
1112 */
1113 int type;
1114 /* flags (see below) */
1115 uint32_t flag;
1116
1117 /* actually longer: name (variable length) */
1118 char name[4];
1119 };
1120
1121 EXTERN struct tbl vtemp;
1122
1123 /* common flag bits */
1124 #define ALLOC BIT(0) /* val.s has been allocated */
1125 #define DEFINED BIT(1) /* is defined in block */
1126 #define ISSET BIT(2) /* has value, vp->val.[si] */
1127 #define EXPORT BIT(3) /* exported variable/function */
1128 #define TRACE BIT(4) /* var: user flagged, func: execution tracing */
1129 /* (start non-common flags at 8) */
1130 /* flag bits used for variables */
1131 #define SPECIAL BIT(8) /* PATH, IFS, SECONDS, etc */
1132 #define INTEGER BIT(9) /* val.i contains integer value */
1133 #define RDONLY BIT(10) /* read-only variable */
1134 #define LOCAL BIT(11) /* for local typeset() */
1135 #define ARRAY BIT(13) /* array */
1136 #define LJUST BIT(14) /* left justify */
1137 #define RJUST BIT(15) /* right justify */
1138 #define ZEROFIL BIT(16) /* 0 filled if RJUSTIFY, strip 0s if LJUSTIFY */
1139 #define LCASEV BIT(17) /* convert to lower case */
1140 #define UCASEV_AL BIT(18) /* convert to upper case / autoload function */
1141 #define INT_U BIT(19) /* unsigned integer */
1142 #define INT_L BIT(20) /* long integer (no-op but used as magic) */
1143 #define IMPORT BIT(21) /* flag to typeset(): no arrays, must have = */
1144 #define LOCAL_COPY BIT(22) /* with LOCAL - copy attrs from existing var */
1145 #define EXPRINEVAL BIT(23) /* contents currently being evaluated */
1146 #define EXPRLVALUE BIT(24) /* useable as lvalue (temp flag) */
1147 #define AINDEX BIT(25) /* array index >0 = ua.index filled in */
1148 #define ASSOC BIT(26) /* ARRAY ? associative : reference */
1149 /* flag bits used for taliases/builtins/aliases/keywords/functions */
1150 #define KEEPASN BIT(8) /* keep command assignments (eg, var=x cmd) */
1151 #define FINUSE BIT(9) /* function being executed */
1152 #define FDELETE BIT(10) /* function deleted while it was executing */
1153 #define FKSH BIT(11) /* function defined with function x (vs x()) */
1154 #define SPEC_BI BIT(12) /* a POSIX special builtin */
1155 /*
1156 * Attributes that can be set by the user (used to decide if an unset
1157 * param should be repoted by set/typeset). Does not include ARRAY or
1158 * LOCAL.
1159 */
1160 #define USERATTRIB (EXPORT|INTEGER|RDONLY|LJUST|RJUST|ZEROFIL|\
1161 LCASEV|UCASEV_AL|INT_U|INT_L)
1162
1163 #define arrayindex(vp) ((unsigned long)((vp)->flag & AINDEX ? \
1164 (vp)->ua.index : 0))
1165
1166 EXTERN enum {
1167 SRF_NOP,
1168 SRF_ENABLE,
1169 SRF_DISABLE
1170 } set_refflag E_INIT(SRF_NOP);
1171
1172 /* command types */
1173 #define CNONE 0 /* undefined */
1174 #define CSHELL 1 /* built-in */
1175 #define CFUNC 2 /* function */
1176 #define CEXEC 4 /* executable command */
1177 #define CALIAS 5 /* alias */
1178 #define CKEYWD 6 /* keyword */
1179 #define CTALIAS 7 /* tracked alias */
1180
1181 /* Flags for findcom()/comexec() */
1182 #define FC_SPECBI BIT(0) /* special builtin */
1183 #define FC_FUNC BIT(1) /* function */
1184 #define FC_NORMBI BIT(2) /* not special builtin */
1185 #define FC_BI (FC_SPECBI | FC_NORMBI)
1186 #define FC_PATH BIT(3) /* do path search */
1187 #define FC_DEFPATH BIT(4) /* use default path in path search */
1188
1189
1190 #define AF_ARGV_ALLOC 0x1 /* argv[] array allocated */
1191 #define AF_ARGS_ALLOCED 0x2 /* argument strings allocated */
1192 #define AI_ARGV(a, i) ((i) == 0 ? (a).argv[0] : (a).argv[(i) - (a).skip])
1193 #define AI_ARGC(a) ((a).ai_argc - (a).skip)
1194
1195 /* Argument info. Used for $#, $* for shell, functions, includes, etc. */
1196 struct arg_info {
1197 const char **argv;
1198 int flags; /* AF_* */
1199 int ai_argc;
1200 int skip; /* first arg is argv[0], second is argv[1 + skip] */
1201 };
1202
1203 /*
1204 * activation record for function blocks
1205 */
1206 struct block {
1207 Area area; /* area to allocate things */
1208 const char **argv;
1209 char *error; /* error handler */
1210 char *exit; /* exit handler */
1211 struct block *next; /* enclosing block */
1212 struct table vars; /* local variables */
1213 struct table funs; /* local functions */
1214 Getopt getopts_state;
1215 int argc;
1216 int flags; /* see BF_* */
1217 };
1218
1219 /* Values for struct block.flags */
1220 #define BF_DOGETOPTS BIT(0) /* save/restore getopts state */
1221
1222 /*
1223 * Used by ktwalk() and ktnext() routines.
1224 */
1225 struct tstate {
1226 struct tbl **next;
1227 ssize_t left;
1228 };
1229
1230 EXTERN struct table taliases; /* tracked aliases */
1231 EXTERN struct table builtins; /* built-in commands */
1232 EXTERN struct table aliases; /* aliases */
1233 EXTERN struct table keywords; /* keywords */
1234 #ifndef MKSH_NOPWNAM
1235 EXTERN struct table homedirs; /* homedir() cache */
1236 #endif
1237
1238 struct builtin {
1239 const char *name;
1240 int (*func)(const char **);
1241 };
1242
1243 extern const struct builtin mkshbuiltins[];
1244
1245 /* values for set_prompt() */
1246 #define PS1 0 /* command */
1247 #define PS2 1 /* command continuation */
1248
1249 EXTERN char *path; /* copy of either PATH or def_path */
1250 EXTERN const char *def_path; /* path to use if PATH not set */
1251 EXTERN char *tmpdir; /* TMPDIR value */
1252 EXTERN const char *prompt;
1253 EXTERN int cur_prompt; /* PS1 or PS2 */
1254 EXTERN int current_lineno; /* LINENO value */
1255
1256 /*
1257 * Description of a command or an operation on commands.
1258 */
1259 struct op {
1260 const char **args; /* arguments to a command */
1261 char **vars; /* variable assignments */
1262 struct ioword **ioact; /* IO actions (eg, < > >>) */
1263 struct op *left, *right; /* descendents */
1264 char *str; /* word for case; identifier for for,
1265 * select, and functions;
1266 * path to execute for TEXEC;
1267 * time hook for TCOM.
1268 */
1269 int lineno; /* TCOM/TFUNC: LINENO for this */
1270 short type; /* operation type, see below */
1271 /* WARNING: newtp(), tcopy() use evalflags = 0 to clear union */
1272 union {
1273 /* TCOM: arg expansion eval() flags */
1274 short evalflags;
1275 /* TFUNC: function x (vs x()) */
1276 short ksh_func;
1277 /* TPAT: termination character */
1278 char charflag;
1279 } u;
1280 };
1281
1282 /* Tree.type values */
1283 #define TEOF 0
1284 #define TCOM 1 /* command */
1285 #define TPAREN 2 /* (c-list) */
1286 #define TPIPE 3 /* a | b */
1287 #define TLIST 4 /* a ; b */
1288 #define TOR 5 /* || */
1289 #define TAND 6 /* && */
1290 #define TBANG 7 /* ! */
1291 #define TDBRACKET 8 /* [[ .. ]] */
1292 #define TFOR 9
1293 #define TSELECT 10
1294 #define TCASE 11
1295 #define TIF 12
1296 #define TWHILE 13
1297 #define TUNTIL 14
1298 #define TELIF 15
1299 #define TPAT 16 /* pattern in case */
1300 #define TBRACE 17 /* {c-list} */
1301 #define TASYNC 18 /* c & */
1302 #define TFUNCT 19 /* function name { command; } */
1303 #define TTIME 20 /* time pipeline */
1304 #define TEXEC 21 /* fork/exec eval'd TCOM */
1305 #define TCOPROC 22 /* coprocess |& */
1306
1307 /*
1308 * prefix codes for words in command tree
1309 */
1310 #define EOS 0 /* end of string */
1311 #define CHAR 1 /* unquoted character */
1312 #define QCHAR 2 /* quoted character */
1313 #define COMSUB 3 /* $() substitution (0 terminated) */
1314 #define EXPRSUB 4 /* $(()) substitution (0 terminated) */
1315 #define OQUOTE 5 /* opening " or ' */
1316 #define CQUOTE 6 /* closing " or ' */
1317 #define OSUBST 7 /* opening ${ subst (followed by { or X) */
1318 #define CSUBST 8 /* closing } of above (followed by } or X) */
1319 #define OPAT 9 /* open pattern: *(, @(, etc. */
1320 #define SPAT 10 /* separate pattern: | */
1321 #define CPAT 11 /* close pattern: ) */
1322 #define ADELIM 12 /* arbitrary delimiter: ${foo:2:3} ${foo/bar/baz} */
1323 #define FUNSUB 14 /* ${ foo;} substitution (NUL terminated) */
1324 #define VALSUB 15 /* ${|foo;} substitution (NUL terminated) */
1325
1326 /*
1327 * IO redirection
1328 */
1329 struct ioword {
1330 int unit; /* unit affected */
1331 int flag; /* action (below) */
1332 char *name; /* file name (unused if heredoc) */
1333 char *delim; /* delimiter for <<,<<- */
1334 char *heredoc; /* content of heredoc */
1335 };
1336
1337 /* ioword.flag - type of redirection */
1338 #define IOTYPE 0xF /* type: bits 0:3 */
1339 #define IOREAD 0x1 /* < */
1340 #define IOWRITE 0x2 /* > */
1341 #define IORDWR 0x3 /* <>: todo */
1342 #define IOHERE 0x4 /* << (here file) */
1343 #define IOCAT 0x5 /* >> */
1344 #define IODUP 0x6 /* <&/>& */
1345 #define IOEVAL BIT(4) /* expand in << */
1346 #define IOSKIP BIT(5) /* <<-, skip ^\t* */
1347 #define IOCLOB BIT(6) /* >|, override -o noclobber */
1348 #define IORDUP BIT(7) /* x<&y (as opposed to x>&y) */
1349 #define IONAMEXP BIT(8) /* name has been expanded */
1350 #define IOBASH BIT(9) /* &> etc. */
1351 #define IOHERESTR BIT(10) /* <<< (here string) */
1352 #define IONDELIM BIT(11) /* null delimiter (<<) */
1353
1354 /* execute/exchild flags */
1355 #define XEXEC BIT(0) /* execute without forking */
1356 #define XFORK BIT(1) /* fork before executing */
1357 #define XBGND BIT(2) /* command & */
1358 #define XPIPEI BIT(3) /* input is pipe */
1359 #define XPIPEO BIT(4) /* output is pipe */
1360 #define XXCOM BIT(5) /* `...` command */
1361 #define XPCLOSE BIT(6) /* exchild: close close_fd in parent */
1362 #define XCCLOSE BIT(7) /* exchild: close close_fd in child */
1363 #define XERROK BIT(8) /* non-zero exit ok (for set -e) */
1364 #define XCOPROC BIT(9) /* starting a co-process */
1365 #define XTIME BIT(10) /* timing TCOM command */
1366 #define XPIPEST BIT(11) /* want PIPESTATUS */
1367
1368 /*
1369 * flags to control expansion of words (assumed by t->evalflags to fit
1370 * in a short)
1371 */
1372 #define DOBLANK BIT(0) /* perform blank interpretation */
1373 #define DOGLOB BIT(1) /* expand [?* */
1374 #define DOPAT BIT(2) /* quote *?[ */
1375 #define DOTILDE BIT(3) /* normal ~ expansion (first char) */
1376 #define DONTRUNCOMMAND BIT(4) /* do not run $(command) things */
1377 #define DOASNTILDE BIT(5) /* assignment ~ expansion (after =, :) */
1378 #define DOBRACE BIT(6) /* used by expand(): do brace expansion */
1379 #define DOMAGIC BIT(7) /* used by expand(): string contains MAGIC */
1380 #define DOTEMP BIT(8) /* dito: in word part of ${..[%#=?]..} */
1381 #define DOVACHECK BIT(9) /* var assign check (for typeset, set, etc) */
1382 #define DOMARKDIRS BIT(10) /* force markdirs behaviour */
1383 #if !defined(MKSH_SMALL)
1384 #define DOTCOMEXEC BIT(11) /* not an eval flag, used by sh -c hack */
1385 #endif
1386
1387 /*
1388 * The arguments of [[ .. ]] expressions are kept in t->args[] and flags
1389 * indicating how the arguments have been munged are kept in t->vars[].
1390 * The contents of t->vars[] are stuffed strings (so they can be treated
1391 * like all other t->vars[]) in which the second character is the one that
1392 * is examined. The DB_* defines are the values for these second characters.
1393 */
1394 #define DB_NORM 1 /* normal argument */
1395 #define DB_OR 2 /* || -> -o conversion */
1396 #define DB_AND 3 /* && -> -a conversion */
1397 #define DB_BE 4 /* an inserted -BE */
1398 #define DB_PAT 5 /* a pattern argument */
1399
1400 #define X_EXTRA 20 /* this many extra bytes in X string */
1401
1402 typedef struct XString {
1403 char *end, *beg; /* end, begin of string */
1404 size_t len; /* length */
1405 Area *areap; /* area to allocate/free from */
1406 } XString;
1407
1408 typedef char *XStringP;
1409
1410 /* initialise expandable string */
1411 #define XinitN(xs, length, area) do { \
1412 (xs).len = (length); \
1413 (xs).areap = (area); \
1414 (xs).beg = alloc((xs).len + X_EXTRA, (xs).areap); \
1415 (xs).end = (xs).beg + (xs).len; \
1416 } while (/* CONSTCOND */ 0)
1417 #define Xinit(xs, xp, length, area) do { \
1418 XinitN((xs), (length), (area)); \
1419 (xp) = (xs).beg; \
1420 } while (/* CONSTCOND */ 0)
1421
1422 /* stuff char into string */
1423 #define Xput(xs, xp, c) (*xp++ = (c))
1424
1425 /* check if there are at least n bytes left */
1426 #define XcheckN(xs, xp, n) do { \
1427 ssize_t more = ((xp) + (n)) - (xs).end; \
1428 if (more > 0) \
1429 (xp) = Xcheck_grow(&(xs), (xp), more); \
1430 } while (/* CONSTCOND */ 0)
1431
1432 /* check for overflow, expand string */
1433 #define Xcheck(xs, xp) XcheckN((xs), (xp), 1)
1434
1435 /* free string */
1436 #define Xfree(xs, xp) afree((xs).beg, (xs).areap)
1437
1438 /* close, return string */
1439 #define Xclose(xs, xp) aresize((xs).beg, (xp) - (xs).beg, (xs).areap)
1440
1441 /* begin of string */
1442 #define Xstring(xs, xp) ((xs).beg)
1443
1444 #define Xnleft(xs, xp) ((xs).end - (xp)) /* may be less than 0 */
1445 #define Xlength(xs, xp) ((xp) - (xs).beg)
1446 #define Xsize(xs, xp) ((xs).end - (xs).beg)
1447 #define Xsavepos(xs, xp) ((xp) - (xs).beg)
1448 #define Xrestpos(xs, xp, n) ((xs).beg + (n))
1449
1450 char *Xcheck_grow(XString *, const char *, size_t);
1451
1452 /*
1453 * expandable vector of generic pointers
1454 */
1455
1456 typedef struct {
1457 /* begin of allocated area */
1458 void **beg;
1459 /* currently used number of entries */
1460 size_t len;
1461 /* allocated number of entries */
1462 size_t siz;
1463 } XPtrV;
1464
1465 #define XPinit(x, n) do { \
1466 (x).siz = (n); \
1467 (x).len = 0; \
1468 (x).beg = alloc2((x).siz, sizeof(void *), ATEMP); \
1469 } while (/* CONSTCOND */ 0) \
1470
1471 #define XPput(x, p) do { \
1472 if ((x).len == (x).siz) { \
1473 (x).beg = aresize2((x).beg, (x).siz, \
1474 2 * sizeof(void *), ATEMP); \
1475 (x).siz <<= 1; \
1476 } \
1477 (x).beg[(x).len++] = (p); \
1478 } while (/* CONSTCOND */ 0)
1479
1480 #define XPptrv(x) ((x).beg)
1481 #define XPsize(x) ((x).len)
1482 #define XPclose(x) aresize2((x).beg, XPsize(x), sizeof(void *), ATEMP)
1483 #define XPfree(x) afree((x).beg, ATEMP)
1484
1485 /*
1486 * Lexer internals
1487 */
1488
1489 typedef struct source Source;
1490 struct source {
1491 const char *str; /* input pointer */
1492 const char *start; /* start of current buffer */
1493 union {
1494 const char **strv; /* string [] */
1495 struct shf *shf; /* shell file */
1496 struct tbl *tblp; /* alias (SF_HASALIAS) */
1497 char *freeme; /* also for SREREAD */
1498 } u;
1499 const char *file; /* input file name */
1500 int type; /* input type */
1501 int line; /* line number */
1502 int errline; /* line the error occurred on (0 if not set) */
1503 int flags; /* SF_* */
1504 Area *areap;
1505 Source *next; /* stacked source */
1506 XString xs; /* input buffer */
1507 char ugbuf[2]; /* buffer for ungetsc() (SREREAD) and
1508 * alias (SALIAS) */
1509 };
1510
1511 /* Source.type values */
1512 #define SEOF 0 /* input EOF */
1513 #define SFILE 1 /* file input */
1514 #define SSTDIN 2 /* read stdin */
1515 #define SSTRING 3 /* string */
1516 #define SWSTR 4 /* string without \n */
1517 #define SWORDS 5 /* string[] */
1518 #define SWORDSEP 6 /* string[] separator */
1519 #define SALIAS 7 /* alias expansion */
1520 #define SREREAD 8 /* read ahead to be re-scanned */
1521 #define SSTRINGCMDLINE 9 /* string from "mksh -c ..." */
1522
1523 /* Source.flags values */
1524 #define SF_ECHO BIT(0) /* echo input to shlout */
1525 #define SF_ALIAS BIT(1) /* faking space at end of alias */
1526 #define SF_ALIASEND BIT(2) /* faking space at end of alias */
1527 #define SF_TTY BIT(3) /* type == SSTDIN & it is a tty */
1528 #define SF_HASALIAS BIT(4) /* u.tblp valid (SALIAS, SEOF) */
1529 #if !defined(MKSH_SMALL)
1530 #define SF_MAYEXEC BIT(5) /* special sh -c optimisation hack */
1531 #endif
1532
1533 typedef union {
1534 int i;
1535 char *cp;
1536 char **wp;
1537 struct op *o;
1538 struct ioword *iop;
1539 } YYSTYPE;
1540
1541 /* If something is added here, add it to tokentab[] in syn.c as well */
1542 #define LWORD 256
1543 #define LOGAND 257 /* && */
1544 #define LOGOR 258 /* || */
1545 #define BREAK 259 /* ;; */
1546 #define IF 260
1547 #define THEN 261
1548 #define ELSE 262
1549 #define ELIF 263
1550 #define FI 264
1551 #define CASE 265
1552 #define ESAC 266
1553 #define FOR 267
1554 #define SELECT 268
1555 #define WHILE 269
1556 #define UNTIL 270
1557 #define DO 271
1558 #define DONE 272
1559 #define IN 273
1560 #define FUNCTION 274
1561 #define TIME 275
1562 #define REDIR 276
1563 #define MDPAREN 277 /* (( )) */
1564 #define BANG 278 /* ! */
1565 #define DBRACKET 279 /* [[ .. ]] */
1566 #define COPROC 280 /* |& */
1567 #define BRKEV 281 /* ;| */
1568 #define BRKFT 282 /* ;& */
1569 #define YYERRCODE 300
1570
1571 /* flags to yylex */
1572 #define CONTIN BIT(0) /* skip new lines to complete command */
1573 #define ONEWORD BIT(1) /* single word for substitute() */
1574 #define ALIAS BIT(2) /* recognise alias */
1575 #define KEYWORD BIT(3) /* recognise keywords */
1576 #define LETEXPR BIT(4) /* get expression inside (( )) */
1577 #define VARASN BIT(5) /* check for var=word */
1578 #define ARRAYVAR BIT(6) /* parse x[1 & 2] as one word */
1579 #define ESACONLY BIT(7) /* only accept esac keyword */
1580 #define CMDWORD BIT(8) /* parsing simple command (alias related) */
1581 #define HEREDELIM BIT(9) /* parsing <<,<<- delimiter */
1582 #define LQCHAR BIT(10) /* source string contains QCHAR */
1583 #define HEREDOC BIT(11) /* parsing a here document body */
1584
1585 #define HERES 10 /* max number of << in line */
1586
1587 #undef CTRL
1588 #define CTRL(x) ((x) == '?' ? 0x7F : (x) & 0x1F) /* ASCII */
1589 #define UNCTRL(x) ((x) ^ 0x40) /* ASCII */
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 /* NZAAT hash based on Bob Jenkins' one-at-a-time hash */
1618
1619 /* From: src/kern/include/nzat.h,v 1.2 2011/07/18 00:35:40 tg Exp $ */
1620
1621 #define NZATInit(h) do { \
1622 (h) = 0; \
1623 } while (/* CONSTCOND */ 0)
1624
1625 #define NZATUpdateByte(h,b) do { \
1626 (h) += (uint8_t)(b); \
1627 ++(h); \
1628 (h) += (h) << 10; \
1629 (h) ^= (h) >> 6; \
1630 } while (/* CONSTCOND */ 0)
1631
1632 #define NZATUpdateMem(h,p,z) do { \
1633 register const uint8_t *NZATUpdateMem_p; \
1634 register size_t NZATUpdateMem_z = (z); \
1635 \
1636 NZATUpdateMem_p = (const void *)(p); \
1637 while (NZATUpdateMem_z--) \
1638 NZATUpdateByte((h), *NZATUpdateMem_p++); \
1639 } while (/* CONSTCOND */ 0)
1640
1641 #define NZATUpdateString(h,s) do { \
1642 register const char *NZATUpdateString_s; \
1643 register uint8_t NZATUpdateString_c; \
1644 \
1645 NZATUpdateString_s = (const void *)(s); \
1646 while ((NZATUpdateString_c = *NZATUpdateString_s++)) \
1647 NZATUpdateByte((h), NZATUpdateString_c); \
1648 } while (/* CONSTCOND */ 0)
1649
1650 #define NZAATFinish(h) do { \
1651 (h) += (h) << 10; \
1652 (h) ^= (h) >> 6; \
1653 (h) += (h) << 3; \
1654 (h) ^= (h) >> 11; \
1655 (h) += (h) << 15; \
1656 } while (/* CONSTCOND */ 0)
1657
1658
1659 /* lalloc.c */
1660 void ainit(Area *);
1661 void afreeall(Area *);
1662 /* these cannot fail and can take NULL (not for ap) */
1663 #define alloc(n, ap) aresize(NULL, (n), (ap))
1664 #define alloc2(m, n, ap) aresize2(NULL, (m), (n), (ap))
1665 void *aresize(void *, size_t, Area *);
1666 void *aresize2(void *, size_t, size_t, Area *);
1667 void afree(void *, Area *); /* can take NULL */
1668 /* edit.c */
1669 #ifndef MKSH_NO_CMDLINE_EDITING
1670 #ifndef MKSH_SMALL
1671 int x_bind(const char *, const char *, bool, bool);
1672 #else
1673 int x_bind(const char *, const char *, bool);
1674 #endif
1675 void x_init(void);
1676 #ifdef DEBUG_LEAKS
1677 void x_done(void);
1678 #endif
1679 int x_read(char *);
1680 #endif
1681 void x_mkraw(int, mksh_ttyst *, bool);
1682 /* eval.c */
1683 char *substitute(const char *, int);
1684 char **eval(const char **, int);
1685 char *evalstr(const char *cp, int);
1686 char *evalonestr(const char *cp, int);
1687 char *debunk(char *, const char *, size_t);
1688 void expand(const char *, XPtrV *, int);
1689 int glob_str(char *, XPtrV *, bool);
1690 char *tilde(char *);
1691 /* exec.c */
1692 int execute(struct op * volatile, volatile int, volatile int * volatile);
1693 int shcomexec(const char **);
1694 struct tbl *findfunc(const char *, uint32_t, bool);
1695 int define(const char *, struct op *);
1696 const char *builtin(const char *, int (*)(const char **));
1697 struct tbl *findcom(const char *, int);
1698 void flushcom(bool);
1699 const char *search_path(const char *, const char *, int, int *);
1700 void pr_menu(const char * const *);
1701 void pr_list(char * const *);
1702 /* expr.c */
1703 int evaluate(const char *, mksh_ari_t *, int, bool);
1704 int v_evaluate(struct tbl *, const char *, volatile int, bool);
1705 /* UTF-8 stuff */
1706 size_t utf_mbtowc(unsigned int *, const char *);
1707 size_t utf_wctomb(char *, unsigned int);
1708 int utf_widthadj(const char *, const char **);
1709 size_t utf_mbswidth(const char *);
1710 const char *utf_skipcols(const char *, int);
1711 size_t utf_ptradj(const char *);
1712 #ifndef MKSH_mirbsd_wcwidth
1713 int utf_wcwidth(unsigned int);
1714 #endif
1715 int ksh_access(const char *, int);
1716 struct tbl *tempvar(void);
1717 /* funcs.c */
1718 int c_hash(const char **);
1719 int c_pwd(const char **);
1720 int c_print(const char **);
1721 #ifdef MKSH_PRINTF_BUILTIN
1722 int c_printf(const char **);
1723 #endif
1724 int c_whence(const char **);
1725 int c_command(const char **);
1726 int c_typeset(const char **);
1727 int c_alias(const char **);
1728 int c_unalias(const char **);
1729 int c_let(const char **);
1730 int c_jobs(const char **);
1731 #ifndef MKSH_UNEMPLOYED
1732 int c_fgbg(const char **);
1733 #endif
1734 int c_kill(const char **);
1735 void getopts_reset(int);
1736 int c_getopts(const char **);
1737 #ifndef MKSH_NO_CMDLINE_EDITING
1738 int c_bind(const char **);
1739 #endif
1740 int c_shift(const char **);
1741 int c_umask(const char **);
1742 int c_dot(const char **);
1743 int c_wait(const char **);
1744 int c_read(const char **);
1745 int c_eval(const char **);
1746 int c_trap(const char **);
1747 int c_brkcont(const char **);
1748 int c_exitreturn(const char **);
1749 int c_set(const char **);
1750 int c_unset(const char **);
1751 int c_ulimit(const char **);
1752 int c_times(const char **);
1753 int timex(struct op *, int, volatile int *);
1754 void timex_hook(struct op *, char ** volatile *);
1755 int c_exec(const char **);
1756 /* dummy function (just need pointer value), special case in comexec() */
1757 #define c_builtin shcomexec
1758 int c_test(const char **);
1759 #if HAVE_MKNOD
1760 int c_mknod(const char **);
1761 #endif
1762 int c_realpath(const char **);
1763 int c_rename(const char **);
1764 int c_cat(const char **);
1765 int c_sleep(const char **);
1766 /* histrap.c */
1767 void init_histvec(void);
1768 void hist_init(Source *);
1769 #if HAVE_PERSISTENT_HISTORY
1770 void hist_finish(void);
1771 #endif
1772 void histsave(int *, const char *, bool, bool);
1773 #if !defined(MKSH_SMALL) && HAVE_PERSISTENT_HISTORY
1774 bool histsync(void);
1775 #endif
1776 int c_fc(const char **);
1777 void sethistsize(mksh_ari_t);
1778 #if HAVE_PERSISTENT_HISTORY
1779 void sethistfile(const char *);
1780 #endif
1781 #if !defined(MKSH_NO_CMDLINE_EDITING) && !MKSH_S_NOVI
1782 char **histpos(void);
1783 int histnum(int);
1784 #endif
1785 int findhist(int, int, const char *, int);
1786 char **hist_get_newest(bool);
1787 void inittraps(void);
1788 void alarm_init(void);
1789 Trap *gettrap(const char *, bool);
1790 void trapsig(int);
1791 void intrcheck(void);
1792 int fatal_trap_check(void);
1793 int trap_pending(void);
1794 void runtraps(int intr);
1795 void runtrap(Trap *, bool);
1796 void cleartraps(void);
1797 void restoresigs(void);
1798 void settrap(Trap *, const char *);
1799 int block_pipe(void);
1800 void restore_pipe(int);
1801 int setsig(Trap *, sig_t, int);
1802 void setexecsig(Trap *, int);
1803 #if HAVE_FLOCK || HAVE_LOCK_FCNTL
1804 void mksh_lockfd(int);
1805 void mksh_unlkfd(int);
1806 #endif
1807 /* jobs.c */
1808 void j_init(void);
1809 void j_exit(void);
1810 #ifndef MKSH_UNEMPLOYED
1811 void j_change(void);
1812 #endif
1813 int exchild(struct op *, int, volatile int *, int);
1814 void startlast(void);
1815 int waitlast(void);
1816 int waitfor(const char *, int *);
1817 int j_kill(const char *, int);
1818 #ifndef MKSH_UNEMPLOYED
1819 int j_resume(const char *, int);
1820 #endif
1821 int j_jobs(const char *, int, int);
1822 void j_notify(void);
1823 pid_t j_async(void);
1824 int j_stopped_running(void);
1825 /* lex.c */
1826 int yylex(int);
1827 void yyskiputf8bom(void);
1828 void yyerror(const char *, ...)
1829 MKSH_A_NORETURN
1830 MKSH_A_FORMAT(__printf__, 1, 2);
1831 Source *pushs(int, Area *);
1832 void set_prompt(int, Source *);
1833 int pprompt(const char *, int);
1834 /* main.c */
1835 int include(const char *, int, const char **, bool);
1836 int command(const char *, int);
1837 int shell(Source * volatile, volatile bool);
1838 /* argument MUST NOT be 0 */
1839 void unwind(int) MKSH_A_NORETURN;
1840 void newenv(int);
1841 void quitenv(struct shf *);
1842 void cleanup_parents_env(void);
1843 void cleanup_proc_env(void);
1844 void errorf(const char *, ...)
1845 MKSH_A_NORETURN
1846 MKSH_A_FORMAT(__printf__, 1, 2);
1847 void errorfx(int, const char *, ...)
1848 MKSH_A_NORETURN
1849 MKSH_A_FORMAT(__printf__, 2, 3);
1850 void warningf(bool, const char *, ...)
1851 MKSH_A_FORMAT(__printf__, 2, 3);
1852 void bi_errorf(const char *, ...)
1853 MKSH_A_FORMAT(__printf__, 1, 2);
1854 #define errorfz() errorf(NULL)
1855 #define errorfxz(rc) errorfx((rc), NULL)
1856 #define bi_errorfz() bi_errorf(NULL)
1857 void internal_errorf(const char *, ...)
1858 MKSH_A_NORETURN
1859 MKSH_A_FORMAT(__printf__, 1, 2);
1860 void internal_warningf(const char *, ...)
1861 MKSH_A_FORMAT(__printf__, 1, 2);
1862 void error_prefix(bool);
1863 void shellf(const char *, ...)
1864 MKSH_A_FORMAT(__printf__, 1, 2);
1865 void shprintf(const char *, ...)
1866 MKSH_A_FORMAT(__printf__, 1, 2);
1867 int can_seek(int);
1868 void initio(void);
1869 int ksh_dup2(int, int, bool);
1870 short savefd(int);
1871 void restfd(int, int);
1872 void openpipe(int *);
1873 void closepipe(int *);
1874 int check_fd(const char *, int, const char **);
1875 void coproc_init(void);
1876 void coproc_read_close(int);
1877 void coproc_readw_close(int);
1878 void coproc_write_close(int);
1879 int coproc_getfd(int, const char **);
1880 void coproc_cleanup(int);
1881 struct temp *maketemp(Area *, Temp_type, struct temp **);
1882 void ktinit(Area *, struct table *, uint8_t);
1883 struct tbl *ktscan(struct table *, const char *, uint32_t, struct tbl ***);
1884 /* table, name (key) to search for, hash(n) */
1885 #define ktsearch(tp, s, h) ktscan((tp), (s), (h), NULL)
1886 struct tbl *ktenter(struct table *, const char *, uint32_t);
1887 #define ktdelete(p) do { p->flag = 0; } while (/* CONSTCOND */ 0)
1888 void ktwalk(struct tstate *, struct table *);
1889 struct tbl *ktnext(struct tstate *);
1890 struct tbl **ktsort(struct table *);
1891 #ifdef DF
1892 void DF(const char *, ...)
1893 MKSH_A_FORMAT(__printf__, 1, 2);
1894 #endif
1895 /* misc.c */
1896 void setctypes(const char *, int);
1897 void initctypes(void);
1898 size_t option(const char *);
1899 char *getoptions(void);
1900 void change_flag(enum sh_flag, int, bool);
1901 void change_xtrace(unsigned char, bool);
1902 int parse_args(const char **, int, bool *);
1903 int getn(const char *, int *);
1904 int gmatchx(const char *, const char *, bool);
1905 int has_globbing(const char *, const char *);
1906 int xstrcmp(const void *, const void *);
1907 void ksh_getopt_reset(Getopt *, int);
1908 int ksh_getopt(const char **, Getopt *, const char *);
1909 void print_value_quoted(struct shf *, const char *);
1910 char *quote_value(const char *);
1911 void print_columns(struct shf *, unsigned int,
1912 char *(*)(char *, size_t, unsigned int, const void *),
1913 const void *, size_t, size_t, bool);
1914 void strip_nuls(char *, int);
1915 ssize_t blocking_read(int, char *, size_t)
1916 MKSH_A_BOUNDED(__buffer__, 2, 3);
1917 int reset_nonblock(int);
1918 char *ksh_get_wd(void);
1919 char *do_realpath(const char *);
1920 void simplify_path(char *);
1921 void set_current_wd(const char *);
1922 int c_cd(const char **);
1923 #if defined(MKSH_SMALL) && !defined(MKSH_SMALL_BUT_FAST)
1924 char *strdup_i(const char *, Area *);
1925 char *strndup_i(const char *, size_t, Area *);
1926 #endif
1927 int unbksl(bool, int (*)(void), void (*)(int));
1928 /* shf.c */
1929 struct shf *shf_open(const char *, int, int, int);
1930 struct shf *shf_fdopen(int, int, struct shf *);
1931 struct shf *shf_reopen(int, int, struct shf *);
1932 struct shf *shf_sopen(char *, ssize_t, int, struct shf *);
1933 int shf_close(struct shf *);
1934 int shf_fdclose(struct shf *);
1935 char *shf_sclose(struct shf *);
1936 int shf_flush(struct shf *);
1937 ssize_t shf_read(char *, ssize_t, struct shf *);
1938 char *shf_getse(char *, ssize_t, struct shf *);
1939 int shf_getchar(struct shf *s);
1940 int shf_ungetc(int, struct shf *);
1941 #if defined(MKSH_SMALL) && !defined(MKSH_SMALL_BUT_FAST)
1942 int shf_getc(struct shf *);
1943 int shf_putc(int, struct shf *);
1944 #else
1945 #define shf_getc shf_getc_i
1946 #define shf_putc shf_putc_i
1947 #endif
1948 int shf_putchar(int, struct shf *);
1949 ssize_t shf_puts(const char *, struct shf *);
1950 ssize_t shf_write(const char *, ssize_t, struct shf *);
1951 ssize_t shf_fprintf(struct shf *, const char *, ...)
1952 MKSH_A_FORMAT(__printf__, 2, 3);
1953 ssize_t shf_snprintf(char *, ssize_t, const char *, ...)
1954 MKSH_A_FORMAT(__printf__, 3, 4)
1955 MKSH_A_BOUNDED(__string__, 1, 2);
1956 char *shf_smprintf(const char *, ...)
1957 MKSH_A_FORMAT(__printf__, 1, 2);
1958 ssize_t shf_vfprintf(struct shf *, const char *, va_list)
1959 MKSH_A_FORMAT(__printf__, 2, 0);
1960 /* syn.c */
1961 void initkeywords(void);
1962 struct op *compile(Source *, bool);
1963 bool parse_usec(const char *, struct timeval *);
1964 char *yyrecursive(int);
1965 void yyrecursive_pop(bool);
1966 /* tree.c */
1967 void fptreef(struct shf *, int, const char *, ...);
1968 char *snptreef(char *, ssize_t, const char *, ...);
1969 struct op *tcopy(struct op *, Area *);
1970 char *wdcopy(const char *, Area *);
1971 const char *wdscan(const char *, int);
1972 #define WDS_TPUTS BIT(0) /* tputS (dumpwdvar) mode */
1973 #define WDS_KEEPQ BIT(1) /* keep quote characters */
1974 #define WDS_MAGIC BIT(2) /* make MAGIC */
1975 char *wdstrip(const char *, int);
1976 void tfree(struct op *, Area *);
1977 void dumpchar(struct shf *, int);
1978 void dumptree(struct shf *, struct op *);
1979 void dumpwdvar(struct shf *, const char *);
1980 void dumpioact(struct shf *shf, struct op *t);
1981 void vistree(char *, size_t, struct op *)
1982 MKSH_A_BOUNDED(__string__, 1, 2);
1983 void fpFUNCTf(struct shf *, int, bool, const char *, struct op *);
1984 /* var.c */
1985 void newblock(void);
1986 void popblock(void);
1987 void initvar(void);
1988 struct block *varsearch(struct block *, struct tbl **, const char *, uint32_t);
1989 struct tbl *global(const char *);
1990 struct tbl *local(const char *, bool);
1991 char *str_val(struct tbl *);
1992 int setstr(struct tbl *, const char *, int);
1993 struct tbl *setint_v(struct tbl *, struct tbl *, bool);
1994 void setint(struct tbl *, mksh_ari_t);
1995 void setint_n(struct tbl *, mksh_ari_t, int);
1996 struct tbl *typeset(const char *, uint32_t, uint32_t, int, int);
1997 void unset(struct tbl *, int);
1998 const char *skip_varname(const char *, int);
1999 const char *skip_wdvarname(const char *, bool);
2000 int is_wdvarname(const char *, bool);
2001 int is_wdvarassign(const char *);
2002 struct tbl *arraysearch(struct tbl *, uint32_t);
2003 char **makenv(void);
2004 void change_winsz(void);
2005 size_t array_ref_len(const char *);
2006 char *arrayname(const char *);
2007 mksh_uari_t set_array(const char *, bool, const char **);
2008 uint32_t hash(const void *);
2009 mksh_ari_t rndget(void);
2010 void rndset(unsigned long);
2011
2012 enum Test_op {
2013 /* non-operator */
2014 TO_NONOP = 0,
2015 /* unary operators */
2016 TO_STNZE, TO_STZER, TO_OPTION,
2017 TO_FILAXST,
2018 TO_FILEXST,
2019 TO_FILREG, TO_FILBDEV, TO_FILCDEV, TO_FILSYM, TO_FILFIFO, TO_FILSOCK,
2020 TO_FILCDF, TO_FILID, TO_FILGID, TO_FILSETG, TO_FILSTCK, TO_FILUID,
2021 TO_FILRD, TO_FILGZ, TO_FILTT, TO_FILSETU, TO_FILWR, TO_FILEX,
2022 /* binary operators */
2023 TO_STEQL, TO_STNEQ, TO_STLT, TO_STGT, TO_INTEQ, TO_INTNE, TO_INTGT,
2024 TO_INTGE, TO_INTLT, TO_INTLE, TO_FILEQ, TO_FILNT, TO_FILOT,
2025 /* not an operator */
2026 TO_NONNULL /* !TO_NONOP */
2027 };
2028 typedef enum Test_op Test_op;
2029
2030 /* Used by Test_env.isa() (order important - used to index *_tokens[] arrays) */
2031 enum Test_meta {
2032 TM_OR, /* -o or || */
2033 TM_AND, /* -a or && */
2034 TM_NOT, /* ! */
2035 TM_OPAREN, /* ( */
2036 TM_CPAREN, /* ) */
2037 TM_UNOP, /* unary operator */
2038 TM_BINOP, /* binary operator */
2039 TM_END /* end of input */
2040 };
2041 typedef enum Test_meta Test_meta;
2042
2043 #define TEF_ERROR BIT(0) /* set if we've hit an error */
2044 #define TEF_DBRACKET BIT(1) /* set if [[ .. ]] test */
2045
2046 typedef struct test_env {
2047 union {
2048 const char **wp; /* used by ptest_* */
2049 XPtrV *av; /* used by dbtestp_* */
2050 } pos;
2051 const char **wp_end; /* used by ptest_* */
2052 Test_op (*isa)(struct test_env *, Test_meta);
2053 const char *(*getopnd) (struct test_env *, Test_op, bool);
2054 int (*eval)(struct test_env *, Test_op, const char *, const char *, bool);
2055 void (*error)(struct test_env *, int, const char *);
2056 int flags; /* TEF_* */
2057 } Test_env;
2058
2059 extern const char * const dbtest_tokens[];
2060
2061 Test_op test_isop(Test_meta, const char *);
2062 int test_eval(Test_env *, Test_op, const char *, const char *, bool);
2063 int test_parse(Test_env *);
2064
2065 EXTERN int tty_fd E_INIT(-1); /* dup'd tty file descriptor */
2066 EXTERN bool tty_devtty; /* true if tty_fd is from /dev/tty */
2067 EXTERN mksh_ttyst tty_state; /* saved tty state */
2068 EXTERN bool tty_hasstate; /* true if tty_state is valid */
2069
2070 extern int tty_init_fd(void); /* initialise tty_fd, tty_devtty */
2071
2072 /* be sure not to interfere with anyone else's idea about EXTERN */
2073 #ifdef EXTERN_DEFINED
2074 # undef EXTERN_DEFINED
2075 # undef EXTERN
2076 #endif
2077 #undef E_INIT
2078
2079 #endif /* !MKSH_INCLUDES_ONLY */
2080