1 /* $OpenBSD: sh.h,v 1.35 2015/09/10 22:48:58 nicm Exp $ */
2 /* $OpenBSD: shf.h,v 1.6 2005/12/11 18:53:51 deraadt Exp $ */
3 /* $OpenBSD: table.h,v 1.8 2012/02/19 07:52:30 otto Exp $ */
4 /* $OpenBSD: tree.h,v 1.10 2005/03/28 21:28:22 deraadt Exp $ */
5 /* $OpenBSD: expand.h,v 1.7 2015/09/01 13:12:31 tedu Exp $ */
6 /* $OpenBSD: lex.h,v 1.13 2013/03/03 19:11:34 guenther Exp $ */
7 /* $OpenBSD: proto.h,v 1.35 2013/09/04 15:49:19 millert Exp $ */
8 /* $OpenBSD: c_test.h,v 1.4 2004/12/20 11:34:26 otto Exp $ */
9 /* $OpenBSD: tty.h,v 1.5 2004/12/20 11:34:26 otto Exp $ */
10
11 /*-
12 * Copyright © 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
13 * 2011, 2012, 2013, 2014, 2015, 2016, 2017
14 * mirabilos <m@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_IO_H
68 #include <io.h>
69 #endif
70 #if HAVE_LIBGEN_H
71 #include <libgen.h>
72 #endif
73 #if HAVE_LIBUTIL_H
74 #include <libutil.h>
75 #endif
76 #include <limits.h>
77 #if HAVE_PATHS_H
78 #include <paths.h>
79 #endif
80 #include <pwd.h>
81 #include <setjmp.h>
82 #include <signal.h>
83 #include <stdarg.h>
84 #include <stddef.h>
85 #if HAVE_STDINT_H
86 #include <stdint.h>
87 #endif
88 #include <stdio.h>
89 #include <stdlib.h>
90 #include <string.h>
91 #if HAVE_STRINGS_H
92 #include <strings.h>
93 #endif
94 #if HAVE_TERMIOS_H
95 #include <termios.h>
96 #else
97 /* shudder… */
98 #include <termio.h>
99 #endif
100 #ifdef _ISC_UNIX
101 /* XXX imake style */
102 #include <sys/sioctl.h>
103 #endif
104 #if HAVE_ULIMIT_H
105 #include <ulimit.h>
106 #endif
107 #include <unistd.h>
108 #if HAVE_VALUES_H
109 #include <values.h>
110 #endif
111 #ifdef MIRBSD_BOOTFLOPPY
112 #include <wchar.h>
113 #endif
114
115 #undef __attribute__
116 #if HAVE_ATTRIBUTE_BOUNDED
117 #define MKSH_A_BOUNDED(x,y,z) __attribute__((__bounded__(x, y, z)))
118 #else
119 #define MKSH_A_BOUNDED(x,y,z) /* nothing */
120 #endif
121 #if HAVE_ATTRIBUTE_FORMAT
122 #define MKSH_A_FORMAT(x,y,z) __attribute__((__format__(x, y, z)))
123 #else
124 #define MKSH_A_FORMAT(x,y,z) /* nothing */
125 #endif
126 #if HAVE_ATTRIBUTE_NORETURN
127 #define MKSH_A_NORETURN __attribute__((__noreturn__))
128 #else
129 #define MKSH_A_NORETURN /* nothing */
130 #endif
131 #if HAVE_ATTRIBUTE_PURE
132 #define MKSH_A_PURE __attribute__((__pure__))
133 #else
134 #define MKSH_A_PURE /* nothing */
135 #endif
136 #if HAVE_ATTRIBUTE_UNUSED
137 #define MKSH_A_UNUSED __attribute__((__unused__))
138 #else
139 #define MKSH_A_UNUSED /* nothing */
140 #endif
141 #if HAVE_ATTRIBUTE_USED
142 #define MKSH_A_USED __attribute__((__used__))
143 #else
144 #define MKSH_A_USED /* nothing */
145 #endif
146
147 #if defined(MirBSD) && (MirBSD >= 0x09A1) && \
148 defined(__ELF__) && defined(__GNUC__) && \
149 !defined(__llvm__) && !defined(__NWCC__)
150 /*
151 * We got usable __IDSTRING __COPYRIGHT __RCSID __SCCSID macros
152 * which work for all cases; no need to redefine them using the
153 * "portable" macros from below when we might have the "better"
154 * gcc+ELF specific macros or other system dependent ones.
155 */
156 #else
157 #undef __IDSTRING
158 #undef __IDSTRING_CONCAT
159 #undef __IDSTRING_EXPAND
160 #undef __COPYRIGHT
161 #undef __RCSID
162 #undef __SCCSID
163 #define __IDSTRING_CONCAT(l,p) __LINTED__ ## l ## _ ## p
164 #define __IDSTRING_EXPAND(l,p) __IDSTRING_CONCAT(l,p)
165 #ifdef MKSH_DONT_EMIT_IDSTRING
166 #define __IDSTRING(prefix, string) /* nothing */
167 #else
168 #define __IDSTRING(prefix, string) \
169 static const char __IDSTRING_EXPAND(__LINE__,prefix) [] \
170 MKSH_A_USED = "@(""#)" #prefix ": " string
171 #endif
172 #define __COPYRIGHT(x) __IDSTRING(copyright,x)
173 #define __RCSID(x) __IDSTRING(rcsid,x)
174 #define __SCCSID(x) __IDSTRING(sccsid,x)
175 #endif
176
177 #ifdef EXTERN
178 __RCSID("$MirOS: src/bin/mksh/sh.h,v 1.808 2017/04/12 17:38:46 tg Exp $");
179 #endif
180 #define MKSH_VERSION "R55 2017/04/12"
181
182 /* arithmetic types: C implementation */
183 #if !HAVE_CAN_INTTYPES
184 #if !HAVE_CAN_UCBINTS
185 typedef signed int int32_t;
186 typedef unsigned int uint32_t;
187 #else
188 typedef u_int32_t uint32_t;
189 #endif
190 #endif
191
192 /* arithmetic types: shell arithmetics */
193 #ifdef MKSH_LEGACY_MODE
194 /*
195 * POSIX demands these to be the C environment's long type
196 */
197 typedef long mksh_ari_t;
198 typedef unsigned long mksh_uari_t;
199 #else
200 /*
201 * These types are exactly 32 bit wide; signed and unsigned
202 * integer wraparound, even across division and modulo, for
203 * any shell code using them, is guaranteed.
204 */
205 typedef int32_t mksh_ari_t;
206 typedef uint32_t mksh_uari_t;
207 #endif
208
209 /* boolean type (no <stdbool.h> deliberately) */
210 typedef unsigned char mksh_bool;
211 #undef bool
212 /* false MUST equal the same 0 as written by static storage initialisation */
213 #undef false
214 #undef true
215 /* access macros for boolean type */
216 #define bool mksh_bool
217 /* values must have identity mapping between mksh_bool and short */
218 #define false 0
219 #define true 1
220 /* make any-type into bool or short */
221 #define tobool(cond) ((cond) ? true : false)
222
223 /* char (octet) type: C implementation */
224 #if !HAVE_CAN_INT8TYPE
225 #if !HAVE_CAN_UCBINT8
226 typedef unsigned char uint8_t;
227 #else
228 typedef u_int8_t uint8_t;
229 #endif
230 #endif
231
232 /* other standard types */
233
234 #if !HAVE_RLIM_T
235 typedef unsigned long rlim_t;
236 #endif
237
238 #if !HAVE_SIG_T
239 #undef sig_t
240 typedef void (*sig_t)(int);
241 #endif
242
243 #ifdef MKSH_TYPEDEF_SIG_ATOMIC_T
244 typedef MKSH_TYPEDEF_SIG_ATOMIC_T sig_atomic_t;
245 #endif
246
247 #ifdef MKSH_TYPEDEF_SSIZE_T
248 typedef MKSH_TYPEDEF_SSIZE_T ssize_t;
249 #endif
250
251 /* un-do vendor damage */
252
253 #undef BAD /* AIX defines that somewhere */
254 #undef PRINT /* LynxOS defines that somewhere */
255 #undef flock /* SCO UnixWare defines that to flock64 but ENOENT */
256
257
258 #ifndef MKSH_INCLUDES_ONLY
259
260 /* extra types */
261
262 /* getrusage does not exist on OS/2 kLIBC */
263 #if !HAVE_GETRUSAGE && !defined(__OS2__)
264 #undef rusage
265 #undef RUSAGE_SELF
266 #undef RUSAGE_CHILDREN
267 #define rusage mksh_rusage
268 #define RUSAGE_SELF 0
269 #define RUSAGE_CHILDREN -1
270
271 struct rusage {
272 struct timeval ru_utime;
273 struct timeval ru_stime;
274 };
275 #endif
276
277 /* extra macros */
278
279 #ifndef timerclear
280 #define timerclear(tvp) \
281 do { \
282 (tvp)->tv_sec = (tvp)->tv_usec = 0; \
283 } while (/* CONSTCOND */ 0)
284 #endif
285 #ifndef timeradd
286 #define timeradd(tvp, uvp, vvp) \
287 do { \
288 (vvp)->tv_sec = (tvp)->tv_sec + (uvp)->tv_sec; \
289 (vvp)->tv_usec = (tvp)->tv_usec + (uvp)->tv_usec; \
290 if ((vvp)->tv_usec >= 1000000) { \
291 (vvp)->tv_sec++; \
292 (vvp)->tv_usec -= 1000000; \
293 } \
294 } while (/* CONSTCOND */ 0)
295 #endif
296 #ifndef timersub
297 #define timersub(tvp, uvp, vvp) \
298 do { \
299 (vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec; \
300 (vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec; \
301 if ((vvp)->tv_usec < 0) { \
302 (vvp)->tv_sec--; \
303 (vvp)->tv_usec += 1000000; \
304 } \
305 } while (/* CONSTCOND */ 0)
306 #endif
307
308 #ifdef MKSH__NO_PATH_MAX
309 #undef PATH_MAX
310 #else
311 #ifndef PATH_MAX
312 #ifdef MAXPATHLEN
313 #define PATH_MAX MAXPATHLEN
314 #else
315 #define PATH_MAX 1024
316 #endif
317 #endif
318 #endif
319 #ifndef SIZE_MAX
320 #ifdef SIZE_T_MAX
321 #define SIZE_MAX SIZE_T_MAX
322 #else
323 #define SIZE_MAX ((size_t)-1)
324 #endif
325 #endif
326 #ifndef S_ISLNK
327 #define S_ISLNK(m) ((m & 0170000) == 0120000)
328 #endif
329 #ifndef S_ISSOCK
330 #define S_ISSOCK(m) ((m & 0170000) == 0140000)
331 #endif
332 #if !defined(S_ISCDF) && defined(S_CDF)
333 #define S_ISCDF(m) (S_ISDIR(m) && ((m) & S_CDF))
334 #endif
335 #ifndef DEFFILEMODE
336 #define DEFFILEMODE (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
337 #endif
338
339
340 /* determine ksh_NSIG: first, use the traditional definitions */
341 #undef ksh_NSIG
342 #if defined(NSIG)
343 #define ksh_NSIG (NSIG)
344 #elif defined(_NSIG)
345 #define ksh_NSIG (_NSIG)
346 #elif defined(SIGMAX)
347 #define ksh_NSIG (SIGMAX + 1)
348 #elif defined(_SIGMAX)
349 #define ksh_NSIG (_SIGMAX + 1)
350 #elif defined(NSIG_MAX)
351 #define ksh_NSIG (NSIG_MAX)
352 #else
353 # error Please have your platform define NSIG.
354 #endif
355 /* range-check them */
356 #if (ksh_NSIG < 1)
357 # error Your NSIG value is not positive.
358 #undef ksh_NSIG
359 #endif
360 /* second, see if the new POSIX definition is available */
361 #ifdef NSIG_MAX
362 #if (NSIG_MAX < 2)
363 /* and usable */
364 # error Your NSIG_MAX value is too small.
365 #undef NSIG_MAX
366 #elif (ksh_NSIG > NSIG_MAX)
367 /* and realistic */
368 # error Your NSIG value is larger than your NSIG_MAX value.
369 #undef NSIG_MAX
370 #else
371 /* since it’s usable, prefer it */
372 #undef ksh_NSIG
373 #define ksh_NSIG (NSIG_MAX)
374 #endif
375 /* if NSIG_MAX is now still defined, use sysconf(_SC_NSIG) at runtime */
376 #endif
377 /* third, for cpp without the error directive, default */
378 #ifndef ksh_NSIG
379 #define ksh_NSIG 64
380 #endif
381
382 #define ksh_sigmask(sig) (((sig) < 1 || (sig) > 127) ? 255 : 128 + (sig))
383
384
385 /* OS-dependent additions (functions, variables, by OS) */
386
387 #ifdef MKSH_EXE_EXT
388 #undef MKSH_EXE_EXT
389 #define MKSH_EXE_EXT ".exe"
390 #else
391 #define MKSH_EXE_EXT ""
392 #endif
393
394 #ifdef __OS2__
395 #define MKSH_UNIXROOT "/@unixroot"
396 #else
397 #define MKSH_UNIXROOT ""
398 #endif
399
400 #ifdef MKSH_DOSPATH
401 #ifndef __GNUC__
402 # error GCC extensions needed later on
403 #endif
404 #define MKSH_PATHSEPS ";"
405 #define MKSH_PATHSEPC ';'
406 #else
407 #define MKSH_PATHSEPS ":"
408 #define MKSH_PATHSEPC ':'
409 #endif
410
411 #if !HAVE_FLOCK_DECL
412 extern int flock(int, int);
413 #endif
414
415 #if !HAVE_GETTIMEOFDAY
416 #define mksh_TIME(tv) do { \
417 (tv).tv_usec = 0; \
418 (tv).tv_sec = time(NULL); \
419 } while (/* CONSTCOND */ 0)
420 #else
421 #define mksh_TIME(tv) gettimeofday(&(tv), NULL)
422 #endif
423
424 #if !HAVE_GETRUSAGE
425 extern int getrusage(int, struct rusage *);
426 #endif
427
428 #if !HAVE_MEMMOVE
429 /* we assume either memmove or bcopy exist, at the moment */
430 #define memmove(dst, src, len) bcopy((src), (dst), (len))
431 #endif
432
433 #if !HAVE_REVOKE_DECL
434 extern int revoke(const char *);
435 #endif
436
437 #if defined(DEBUG) || !HAVE_STRERROR
438 #undef strerror
439 #define strerror /* poisoned */ dontuse_strerror
440 #define cstrerror /* replaced */ cstrerror
441 extern const char *cstrerror(int);
442 #else
443 #define cstrerror(errnum) ((const char *)strerror(errnum))
444 #endif
445
446 #if !HAVE_STRLCPY
447 size_t strlcpy(char *, const char *, size_t);
448 #endif
449
450 #ifdef __INTERIX
451 /* XXX imake style */
452 #define makedev mkdev
453 extern int __cdecl seteuid(uid_t);
454 extern int __cdecl setegid(gid_t);
455 #endif
456
457 #if defined(__COHERENT__)
458 #ifndef O_ACCMODE
459 /* this need not work everywhere, take care */
460 #define O_ACCMODE (O_RDONLY | O_WRONLY | O_RDWR)
461 #endif
462 #endif
463
464 #ifndef O_BINARY
465 #define O_BINARY 0
466 #endif
467
468 #ifdef MKSH__NO_SYMLINK
469 #undef S_ISLNK
470 #define S_ISLNK(m) (/* CONSTCOND */ 0)
471 #define mksh_lstat stat
472 #else
473 #define mksh_lstat lstat
474 #endif
475
476 #if HAVE_TERMIOS_H
477 #define mksh_ttyst struct termios
478 #define mksh_tcget(fd,st) tcgetattr((fd), (st))
479 #define mksh_tcset(fd,st) tcsetattr((fd), TCSADRAIN, (st))
480 #else
481 #define mksh_ttyst struct termio
482 #define mksh_tcget(fd,st) ioctl((fd), TCGETA, (st))
483 #define mksh_tcset(fd,st) ioctl((fd), TCSETAW, (st))
484 #endif
485
486 #ifndef ISTRIP
487 #define ISTRIP 0
488 #endif
489
490
491 /* some useful #defines */
492 #ifdef EXTERN
493 # define E_INIT(i) = i
494 #else
495 # define E_INIT(i)
496 # define EXTERN extern
497 # define EXTERN_DEFINED
498 #endif
499
500 /* define bit in flag */
501 #define BIT(i) (1 << (i))
502 #define NELEM(a) (sizeof(a) / sizeof((a)[0]))
503
504 /*
505 * Make MAGIC a char that might be printed to make bugs more obvious, but
506 * not a char that is used often. Also, can't use the high bit as it causes
507 * portability problems (calling strchr(x, 0x80 | 'x') is error prone).
508 */
509 #define MAGIC (7) /* prefix for *?[!{,} during expand */
510 #define ISMAGIC(c) ((unsigned char)(c) == MAGIC)
511
512 EXTERN const char *safe_prompt; /* safe prompt if PS1 substitution fails */
513
514 #ifdef MKSH_LEGACY_MODE
515 #define KSH_VERSIONNAME_ISLEGACY "LEGACY"
516 #else
517 #define KSH_VERSIONNAME_ISLEGACY "MIRBSD"
518 #endif
519 #ifdef MKSH_WITH_TEXTMODE
520 #define KSH_VERSIONNAME_TEXTMODE " +TEXTMODE"
521 #else
522 #define KSH_VERSIONNAME_TEXTMODE ""
523 #endif
524 #ifndef KSH_VERSIONNAME_VENDOR_EXT
525 #define KSH_VERSIONNAME_VENDOR_EXT ""
526 #endif
527 EXTERN const char initvsn[] E_INIT("KSH_VERSION=@(#)" KSH_VERSIONNAME_ISLEGACY \
528 " KSH " MKSH_VERSION KSH_VERSIONNAME_TEXTMODE KSH_VERSIONNAME_VENDOR_EXT);
529 #define KSH_VERSION (initvsn + /* "KSH_VERSION=@(#)" */ 16)
530
531 EXTERN const char digits_uc[] E_INIT("0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ");
532 EXTERN const char digits_lc[] E_INIT("0123456789abcdefghijklmnopqrstuvwxyz");
533 #define letters_uc (digits_uc + 10)
534 #define letters_lc (digits_lc + 10)
535
536 /*
537 * Evil hack for const correctness due to API brokenness
538 */
539 union mksh_cchack {
540 char *rw;
541 const char *ro;
542 };
543 union mksh_ccphack {
544 char **rw;
545 const char **ro;
546 };
547
548 /*
549 * Evil hack since casting uint to sint is implementation-defined
550 */
551 typedef union {
552 mksh_ari_t i;
553 mksh_uari_t u;
554 } mksh_ari_u;
555
556 /* for const debugging */
557 #if defined(DEBUG) && defined(__GNUC__) && !defined(__ICC) && \
558 !defined(__INTEL_COMPILER) && !defined(__SUNPRO_C)
559 char *ucstrchr(char *, int);
560 char *ucstrstr(char *, const char *);
561 #undef strchr
562 #define strchr ucstrchr
563 #define strstr ucstrstr
564 #define cstrchr(s,c) ({ \
565 union mksh_cchack in, out; \
566 \
567 in.ro = (s); \
568 out.rw = ucstrchr(in.rw, (c)); \
569 (out.ro); \
570 })
571 #define cstrstr(b,l) ({ \
572 union mksh_cchack in, out; \
573 \
574 in.ro = (b); \
575 out.rw = ucstrstr(in.rw, (l)); \
576 (out.ro); \
577 })
578 #define vstrchr(s,c) (cstrchr((s), (c)) != NULL)
579 #define vstrstr(b,l) (cstrstr((b), (l)) != NULL)
580 #else /* !DEBUG, !gcc */
581 #define cstrchr(s,c) ((const char *)strchr((s), (c)))
582 #define cstrstr(s,c) ((const char *)strstr((s), (c)))
583 #define vstrchr(s,c) (strchr((s), (c)) != NULL)
584 #define vstrstr(b,l) (strstr((b), (l)) != NULL)
585 #endif
586
587 #if defined(DEBUG) || defined(__COVERITY__)
588 #define mkssert(e) do { if (!(e)) exit(255); } while (/* CONSTCOND */ 0)
589 #ifndef DEBUG_LEAKS
590 #define DEBUG_LEAKS
591 #endif
592 #else
593 #define mkssert(e) do { } while (/* CONSTCOND */ 0)
594 #endif
595
596 #if (!defined(MKSH_BUILDMAKEFILE4BSD) && !defined(MKSH_BUILDSH)) || (MKSH_BUILD_R != 551)
597 #error Must run Build.sh to compile this.
598 extern void thiswillneverbedefinedIhope(void);
599 int
im_sorry_dave(void)600 im_sorry_dave(void)
601 {
602 /* I’m sorry, Dave. I’m afraid I can’t do that. */
603 return (thiswillneverbedefinedIhope());
604 }
605 #endif
606
607 /* use this ipv strchr(s, 0) but no side effects in s! */
608 #define strnul(s) ((s) + strlen(s))
609
610 #define utf_ptradjx(src, dst) do { \
611 (dst) = (src) + utf_ptradj(src); \
612 } while (/* CONSTCOND */ 0)
613
614 #if defined(MKSH_SMALL) && !defined(MKSH_SMALL_BUT_FAST)
615 #define strdupx(d, s, ap) do { \
616 (d) = strdup_i((s), (ap)); \
617 } while (/* CONSTCOND */ 0)
618 #define strndupx(d, s, n, ap) do { \
619 (d) = strndup_i((s), (n), (ap)); \
620 } while (/* CONSTCOND */ 0)
621 #else
622 /* be careful to evaluate arguments only once! */
623 #define strdupx(d, s, ap) do { \
624 const char *strdup_src = (s); \
625 char *strdup_dst = NULL; \
626 \
627 if (strdup_src != NULL) { \
628 size_t strdup_len = strlen(strdup_src) + 1; \
629 strdup_dst = alloc(strdup_len, (ap)); \
630 memcpy(strdup_dst, strdup_src, strdup_len); \
631 } \
632 (d) = strdup_dst; \
633 } while (/* CONSTCOND */ 0)
634 #define strndupx(d, s, n, ap) do { \
635 const char *strdup_src = (s); \
636 char *strdup_dst = NULL; \
637 \
638 if (strdup_src != NULL) { \
639 size_t strndup_len = (n); \
640 strdup_dst = alloc(strndup_len + 1, (ap)); \
641 memcpy(strdup_dst, strdup_src, strndup_len); \
642 strdup_dst[strndup_len] = '\0'; \
643 } \
644 (d) = strdup_dst; \
645 } while (/* CONSTCOND */ 0)
646 #endif
647
648 #ifdef MKSH_SMALL
649 #ifndef MKSH_NOPWNAM
650 #define MKSH_NOPWNAM /* defined */
651 #endif
652 #ifndef MKSH_S_NOVI
653 #define MKSH_S_NOVI 1
654 #endif
655 #endif
656
657 #ifndef MKSH_S_NOVI
658 #define MKSH_S_NOVI 0
659 #endif
660
661 #if defined(MKSH_NOPROSPECTOFWORK) && !defined(MKSH_UNEMPLOYED)
662 #define MKSH_UNEMPLOYED 1
663 #endif
664
665 #define NUFILE 32 /* Number of user-accessible files */
666 #define FDBASE 10 /* First file usable by Shell */
667
668 /*
669 * simple grouping allocator
670 */
671
672
673 /* 0. OS API: where to get memory from and how to free it (grouped) */
674
675 /* malloc(3)/realloc(3) -> free(3) for use by the memory allocator */
676 #define malloc_osi(sz) malloc(sz)
677 #define realloc_osi(p,sz) realloc((p), (sz))
678 #define free_osimalloc(p) free(p)
679
680 /* malloc(3)/realloc(3) -> free(3) for use by mksh code */
681 #define malloc_osfunc(sz) malloc(sz)
682 #define realloc_osfunc(p,sz) realloc((p), (sz))
683 #define free_osfunc(p) free(p)
684
685 #if HAVE_MKNOD
686 /* setmode(3) -> free(3) */
687 #define free_ossetmode(p) free(p)
688 #endif
689
690 #ifdef MKSH__NO_PATH_MAX
691 /* GNU libc: get_current_dir_name(3) -> free(3) */
692 #define free_gnu_gcdn(p) free(p)
693 #endif
694
695
696 /* 1. internal structure */
697 struct lalloc_common {
698 struct lalloc_common *next;
699 };
700
701 #ifdef MKSH_ALLOC_CATCH_UNDERRUNS
702 struct lalloc_item {
703 struct lalloc_common *next;
704 size_t len;
705 char dummy[8192 - sizeof(struct lalloc_common *) - sizeof(size_t)];
706 };
707 #endif
708
709 /* 2. sizes */
710 #ifdef MKSH_ALLOC_CATCH_UNDERRUNS
711 #define ALLOC_ITEM struct lalloc_item
712 #define ALLOC_OVERHEAD 0
713 #else
714 #define ALLOC_ITEM struct lalloc_common
715 #define ALLOC_OVERHEAD (sizeof(ALLOC_ITEM))
716 #endif
717
718 /* 3. group structure */
719 typedef struct lalloc_common Area;
720
721
722 EXTERN Area aperm; /* permanent object space */
723 #define APERM &aperm
724 #define ATEMP &e->area
725
726 /*
727 * flags (the order of these enums MUST match the order in misc.c(options[]))
728 */
729 enum sh_flag {
730 #define SHFLAGS_ENUMS
731 #include "sh_flags.gen"
732 FNFLAGS /* (place holder: how many flags are there) */
733 };
734
735 #define Flag(f) (shell_flags[(int)(f)])
736 #define UTFMODE Flag(FUNICODE)
737
738 /*
739 * parsing & execution environment
740 *
741 * note that kshlongjmp MUST NOT be passed 0 as second argument!
742 */
743 #ifdef MKSH_NO_SIGSETJMP
744 #define kshjmp_buf jmp_buf
745 #define kshsetjmp(jbuf) _setjmp(jbuf)
746 #define kshlongjmp _longjmp
747 #else
748 #define kshjmp_buf sigjmp_buf
749 #define kshsetjmp(jbuf) sigsetjmp((jbuf), 0)
750 #define kshlongjmp siglongjmp
751 #endif
752
753 struct sretrace_info;
754 struct yyrecursive_state;
755
756 EXTERN struct sretrace_info *retrace_info E_INIT(NULL);
757 EXTERN int subshell_nesting_type E_INIT(0);
758
759 extern struct env {
760 ALLOC_ITEM alloc_INT; /* internal, do not touch */
761 Area area; /* temporary allocation area */
762 struct env *oenv; /* link to previous environment */
763 struct block *loc; /* local variables and functions */
764 short *savefd; /* original redirected fds */
765 struct temp *temps; /* temp files */
766 /* saved parser recursion state */
767 struct yyrecursive_state *yyrecursive_statep;
768 kshjmp_buf jbuf; /* long jump back to env creator */
769 uint8_t type; /* environment type - see below */
770 uint8_t flags; /* EF_* */
771 } *e;
772
773 /* struct env.type values */
774 #define E_NONE 0 /* dummy environment */
775 #define E_PARSE 1 /* parsing command # */
776 #define E_FUNC 2 /* executing function # */
777 #define E_INCL 3 /* including a file via . # */
778 #define E_EXEC 4 /* executing command tree */
779 #define E_LOOP 5 /* executing for/while # */
780 #define E_ERRH 6 /* general error handler # */
781 #define E_GONE 7 /* hidden in child */
782 #define E_EVAL 8 /* running eval # */
783 /* # indicates env has valid jbuf (see unwind()) */
784
785 /* struct env.flag values */
786 #define EF_BRKCONT_PASS BIT(1) /* set if E_LOOP must pass break/continue on */
787 #define EF_FAKE_SIGDIE BIT(2) /* hack to get info from unwind to quitenv */
788
789 /* Do breaks/continues stop at env type e? */
790 #define STOP_BRKCONT(t) ((t) == E_NONE || (t) == E_PARSE || \
791 (t) == E_FUNC || (t) == E_INCL)
792 /* Do returns stop at env type e? */
793 #define STOP_RETURN(t) ((t) == E_FUNC || (t) == E_INCL)
794
795 /* values for kshlongjmp(e->jbuf, i) */
796 /* note that i MUST NOT be zero */
797 #define LRETURN 1 /* return statement */
798 #define LEXIT 2 /* exit statement */
799 #define LERROR 3 /* errorf() called */
800 #define LLEAVE 4 /* untrappable exit/error */
801 #define LINTR 5 /* ^C noticed */
802 #define LBREAK 6 /* break statement */
803 #define LCONTIN 7 /* continue statement */
804 #define LSHELL 8 /* return to interactive shell() */
805 #define LAEXPR 9 /* error in arithmetic expression */
806
807 /* sort of shell global state */
808 EXTERN pid_t procpid; /* PID of executing process */
809 EXTERN int exstat; /* exit status */
810 EXTERN int subst_exstat; /* exit status of last $(..)/`..` */
811 EXTERN struct tbl *vp_pipest; /* global PIPESTATUS array */
812 EXTERN short trap_exstat; /* exit status before running a trap */
813 EXTERN uint8_t trap_nested; /* running nested traps */
814 EXTERN uint8_t shell_flags[FNFLAGS];
815 EXTERN const char *kshname; /* $0 */
816 EXTERN struct {
817 uid_t kshuid_v; /* real UID of shell */
818 uid_t ksheuid_v; /* effective UID of shell */
819 gid_t kshgid_v; /* real GID of shell */
820 gid_t kshegid_v; /* effective GID of shell */
821 pid_t kshpgrp_v; /* process group of shell */
822 pid_t kshppid_v; /* PID of parent of shell */
823 pid_t kshpid_v; /* $$, shell PID */
824 } rndsetupstate;
825
826 #define kshpid rndsetupstate.kshpid_v
827 #define kshpgrp rndsetupstate.kshpgrp_v
828 #define kshuid rndsetupstate.kshuid_v
829 #define ksheuid rndsetupstate.ksheuid_v
830 #define kshgid rndsetupstate.kshgid_v
831 #define kshegid rndsetupstate.kshegid_v
832 #define kshppid rndsetupstate.kshppid_v
833
834
835 /* option processing */
836 #define OF_CMDLINE 0x01 /* command line */
837 #define OF_SET 0x02 /* set builtin */
838 #define OF_SPECIAL 0x04 /* a special variable changing */
839 #define OF_INTERNAL 0x08 /* set internally by shell */
840 #define OF_FIRSTTIME 0x10 /* as early as possible, once */
841 #define OF_ANY (OF_CMDLINE | OF_SET | OF_SPECIAL | OF_INTERNAL)
842
843 /* null value for variable; comparison pointer for unset */
844 EXTERN char null[] E_INIT("");
845
846 /* string pooling: do we rely on the compiler? */
847 #ifndef HAVE_STRING_POOLING
848 /* no, we use our own, saves quite some space */
849 #elif HAVE_STRING_POOLING == 2
850 /* “on demand” */
851 #ifdef __GNUC__
852 /* only for GCC 4 or later, older ones can get by without */
853 #if __GNUC__ < 4
854 #undef HAVE_STRING_POOLING
855 #endif
856 #else
857 /* not GCC, default to on */
858 #endif
859 #elif HAVE_STRING_POOLING == 0
860 /* default to on, unless explicitly set to 0 */
861 #undef HAVE_STRING_POOLING
862 #endif
863
864 #ifndef HAVE_STRING_POOLING /* helpers for pooled strings */
865 EXTERN const char T4spaces[] E_INIT(" ");
866 #define T1space (Treal_sp2 + 5)
867 #define Tcolsp (Tf_sD_ + 2)
868 EXTERN const char TC_LEX1[] E_INIT("|&;<>() \t\n");
869 #define TC_IFSWS (TC_LEX1 + 7)
870 EXTERN const char TFCEDIT_dollaru[] E_INIT("${FCEDIT:-/bin/ed} $_");
871 #define Tspdollaru (TFCEDIT_dollaru + 18)
872 EXTERN const char Tsgdot[] E_INIT("*=.");
873 EXTERN const char Taugo[] E_INIT("augo");
874 EXTERN const char Tbracket[] E_INIT("[");
875 #define Tdot (Tsgdot + 2)
876 #define Talias (Tunalias + 2)
877 EXTERN const char Tbadnum[] E_INIT("bad number");
878 #define Tbadsubst (Tfg_badsubst + 10)
879 EXTERN const char Tbg[] E_INIT("bg");
880 EXTERN const char Tbad_bsize[] E_INIT("bad shf/buf/bsize");
881 #define Tbsize (Tbad_bsize + 12)
882 EXTERN const char Tbad_sig_ss[] E_INIT("%s: bad signal '%s'");
883 #define Tbad_sig_s (Tbad_sig_ss + 4)
884 EXTERN const char Tsgbreak[] E_INIT("*=break");
885 #define Tbreak (Tsgbreak + 2)
886 EXTERN const char T__builtin[] E_INIT("-\\builtin");
887 #define T_builtin (T__builtin + 1)
888 #define Tbuiltin (T__builtin + 2)
889 EXTERN const char Toomem[] E_INIT("can't allocate %zu data bytes");
890 EXTERN const char Tcant_cd[] E_INIT("restricted shell - can't cd");
891 EXTERN const char Tcant_find[] E_INIT("can't find");
892 EXTERN const char Tcant_open[] E_INIT("can't open");
893 #define Tbytes (Toomem + 24)
894 EXTERN const char Tbcat[] E_INIT("!cat");
895 #define Tcat (Tbcat + 1)
896 #define Tcd (Tcant_cd + 25)
897 #define T_command (T_funny_command + 9)
898 #define Tcommand (T_funny_command + 10)
899 EXTERN const char Tsgcontinue[] E_INIT("*=continue");
900 #define Tcontinue (Tsgcontinue + 2)
901 EXTERN const char Tcreate[] E_INIT("create");
902 EXTERN const char TELIF_unexpected[] E_INIT("TELIF unexpected");
903 EXTERN const char TEXECSHELL[] E_INIT("EXECSHELL");
904 EXTERN const char Tdsgexport[] E_INIT("^*=export");
905 #define Texport (Tdsgexport + 3)
906 #ifdef __OS2__
907 EXTERN const char Textproc[] E_INIT("extproc");
908 #endif
909 EXTERN const char Tfalse[] E_INIT("false");
910 EXTERN const char Tfg[] E_INIT("fg");
911 EXTERN const char Tfg_badsubst[] E_INIT("fileglob: bad substitution");
912 #define Tfile (Tfile_fd + 20)
913 EXTERN const char Tfile_fd[] E_INIT("function definition file");
914 EXTERN const char TFPATH[] E_INIT("FPATH");
915 EXTERN const char T_function[] E_INIT(" function");
916 #define Tfunction (T_function + 1)
917 EXTERN const char T_funny_command[] E_INIT("funny $()-command");
918 EXTERN const char Tgetopts[] E_INIT("getopts");
919 #define Thistory (Tnot_in_history + 7)
920 EXTERN const char Tintovfl[] E_INIT("integer overflow %zu %c %zu prevented");
921 EXTERN const char Tinvname[] E_INIT("%s: invalid %s name");
922 EXTERN const char Tjobs[] E_INIT("jobs");
923 EXTERN const char Tjob_not_started[] E_INIT("job not started");
924 EXTERN const char Tmksh[] E_INIT("mksh");
925 #define Tname (Tinvname + 15)
926 EXTERN const char Tno_args[] E_INIT("missing argument");
927 EXTERN const char Tno_OLDPWD[] E_INIT("no OLDPWD");
928 EXTERN const char Tnot_ident[] E_INIT("is not an identifier");
929 EXTERN const char Tnot_in_history[] E_INIT("not in history");
930 EXTERN const char Tnot_found_s[] E_INIT("%s not found");
931 #define Tnot_found (Tnot_found_s + 3)
932 #define Tnot_started (Tjob_not_started + 4)
933 #define TOLDPWD (Tno_OLDPWD + 3)
934 #define Topen (Tcant_open + 6)
935 #define TPATH (TFPATH + 1)
936 #define Tpv (TpVv + 1)
937 EXTERN const char TpVv[] E_INIT("Vpv");
938 #define TPWD (Tno_OLDPWD + 6)
939 #define Tread (Tshf_read + 4)
940 EXTERN const char Tdsgreadonly[] E_INIT("^*=readonly");
941 #define Treadonly (Tdsgreadonly + 3)
942 EXTERN const char Tredirection_dup[] E_INIT("can't finish (dup) redirection");
943 #define Tredirection (Tredirection_dup + 19)
944 #define Treal_sp1 (Treal_sp2 + 1)
945 EXTERN const char Treal_sp2[] E_INIT(" real ");
946 EXTERN const char Treq_arg[] E_INIT("requires an argument");
947 EXTERN const char Tselect[] E_INIT("select");
948 EXTERN const char Tsgset[] E_INIT("*=set");
949 #define Tset (Tf_parm + 18)
950 #define Tsh (Tmksh + 2)
951 #define TSHELL (TEXECSHELL + 4)
952 #define Tshell (Ttoo_many_files + 23)
953 EXTERN const char Tshf_read[] E_INIT("shf_read");
954 EXTERN const char Tshf_write[] E_INIT("shf_write");
955 EXTERN const char Tgsource[] E_INIT("=source");
956 #define Tsource (Tgsource + 1)
957 EXTERN const char Tj_suspend[] E_INIT("j_suspend");
958 #define Tsuspend (Tj_suspend + 2)
959 EXTERN const char Tsynerr[] E_INIT("syntax error");
960 EXTERN const char Ttime[] E_INIT("time");
961 EXTERN const char Ttoo_many_args[] E_INIT("too many arguments");
962 EXTERN const char Ttoo_many_files[] E_INIT("too many open files in shell");
963 EXTERN const char Ttrue[] E_INIT("true");
964 EXTERN const char Ttty_fd_dupof[] E_INIT("dup of tty fd");
965 #define Ttty_fd (Ttty_fd_dupof + 7)
966 EXTERN const char Tdgtypeset[] E_INIT("^=typeset");
967 #define Ttypeset (Tdgtypeset + 2)
968 #define Tugo (Taugo + 1)
969 EXTERN const char Tunalias[] E_INIT("unalias");
970 #define Tunexpected (TELIF_unexpected + 6)
971 EXTERN const char Tunexpected_type[] E_INIT("%s: unexpected %s type %d");
972 EXTERN const char Tunknown_option[] E_INIT("unknown option");
973 EXTERN const char Tunwind[] E_INIT("unwind");
974 #define Tuser_sp1 (Tuser_sp2 + 1)
975 EXTERN const char Tuser_sp2[] E_INIT(" user ");
976 #define Twrite (Tshf_write + 4)
977 EXTERN const char Tf__S[] E_INIT(" %S");
978 #define Tf__d (Tunexpected_type + 22)
979 EXTERN const char Tf__ss[] E_INIT(" %s%s");
980 #define Tf__sN (Tf_s_s_sN + 5)
981 EXTERN const char Tf_sSs[] E_INIT("%s/%s");
982 #define Tf_T (Tf_s_T + 3)
983 EXTERN const char Tf_dN[] E_INIT("%d\n");
984 EXTERN const char Tf_s_[] E_INIT("%s ");
985 EXTERN const char Tf_s_T[] E_INIT("%s %T");
986 EXTERN const char Tf_s_s_sN[] E_INIT("%s %s %s\n");
987 #define Tf_s_s (Tf_sD_s_s + 4)
988 #define Tf_s_sD_s (Tf_cant_ss_s + 6)
989 EXTERN const char Tf_optfoo[] E_INIT("%s%s-%c: %s");
990 EXTERN const char Tf_sD_[] E_INIT("%s: ");
991 EXTERN const char Tf_szs[] E_INIT("%s: %zd %s");
992 EXTERN const char Tf_parm[] E_INIT("%s: parameter not set");
993 EXTERN const char Tf_coproc[] E_INIT("-p: %s");
994 EXTERN const char Tf_cant_s[] E_INIT("%s: can't %s");
995 EXTERN const char Tf_cant_ss_s[] E_INIT("can't %s %s: %s");
996 EXTERN const char Tf_heredoc[] E_INIT("here document '%s' unclosed");
997 #if HAVE_MKNOD
998 EXTERN const char Tf_nonnum[] E_INIT("non-numeric %s %s '%s'");
999 #endif
1000 EXTERN const char Tf_S_[] E_INIT("%S ");
1001 #define Tf_S (Tf__S + 1)
1002 #define Tf_lu (Tf_toolarge + 17)
1003 EXTERN const char Tf_toolarge[] E_INIT("%s %s too large: %lu");
1004 EXTERN const char Tf_ldfailed[] E_INIT("%s %s(%d, %ld) failed: %s");
1005 #define Tf_ss (Tf_sss + 2)
1006 EXTERN const char Tf_sss[] E_INIT("%s%s%s");
1007 EXTERN const char Tf_sD_s_sD_s[] E_INIT("%s: %s %s: %s");
1008 EXTERN const char Tf_toomany[] E_INIT("too many %ss");
1009 EXTERN const char Tf_sd[] E_INIT("%s %d");
1010 #define Tf_s (Tf_temp + 28)
1011 EXTERN const char Tft_end[] E_INIT("%;");
1012 EXTERN const char Tft_R[] E_INIT("%R");
1013 #define Tf_d (Tunexpected_type + 23)
1014 EXTERN const char Tf_sD_s_qs[] E_INIT("%s: %s '%s'");
1015 EXTERN const char Tf_ro[] E_INIT("read-only: %s");
1016 EXTERN const char Tf_flags[] E_INIT("%s: flags 0x%X");
1017 EXTERN const char Tf_temp[] E_INIT("can't %s temporary file %s: %s");
1018 EXTERN const char Tf_ssfaileds[] E_INIT("%s: %s failed: %s");
1019 EXTERN const char Tf_sD_sD_s[] E_INIT("%s: %s: %s");
1020 EXTERN const char Tf__c_[] E_INIT("-%c ");
1021 EXTERN const char Tf_sD_s_s[] E_INIT("%s: %s %s");
1022 #define Tf_sN (Tf_s_s_sN + 6)
1023 #define Tf_sD_s (Tf_temp + 24)
1024 EXTERN const char T_devtty[] E_INIT("/dev/tty");
1025 #else /* helpers for string pooling */
1026 #define T4spaces " "
1027 #define T1space " "
1028 #define Tcolsp ": "
1029 #define TC_LEX1 "|&;<>() \t\n"
1030 #define TC_IFSWS " \t\n"
1031 #define TFCEDIT_dollaru "${FCEDIT:-/bin/ed} $_"
1032 #define Tspdollaru " $_"
1033 #define Tsgdot "*=."
1034 #define Taugo "augo"
1035 #define Tbracket "["
1036 #define Tdot "."
1037 #define Talias "alias"
1038 #define Tbadnum "bad number"
1039 #define Tbadsubst "bad substitution"
1040 #define Tbg "bg"
1041 #define Tbad_bsize "bad shf/buf/bsize"
1042 #define Tbsize "bsize"
1043 #define Tbad_sig_ss "%s: bad signal '%s'"
1044 #define Tbad_sig_s "bad signal '%s'"
1045 #define Tsgbreak "*=break"
1046 #define Tbreak "break"
1047 #define T__builtin "-\\builtin"
1048 #define T_builtin "\\builtin"
1049 #define Tbuiltin "builtin"
1050 #define Toomem "can't allocate %zu data bytes"
1051 #define Tcant_cd "restricted shell - can't cd"
1052 #define Tcant_find "can't find"
1053 #define Tcant_open "can't open"
1054 #define Tbytes "bytes"
1055 #define Tbcat "!cat"
1056 #define Tcat "cat"
1057 #define Tcd "cd"
1058 #define T_command "-command"
1059 #define Tcommand "command"
1060 #define Tsgcontinue "*=continue"
1061 #define Tcontinue "continue"
1062 #define Tcreate "create"
1063 #define TELIF_unexpected "TELIF unexpected"
1064 #define TEXECSHELL "EXECSHELL"
1065 #define Tdsgexport "^*=export"
1066 #define Texport "export"
1067 #ifdef __OS2__
1068 #define Textproc "extproc"
1069 #endif
1070 #define Tfalse "false"
1071 #define Tfg "fg"
1072 #define Tfg_badsubst "fileglob: bad substitution"
1073 #define Tfile "file"
1074 #define Tfile_fd "function definition file"
1075 #define TFPATH "FPATH"
1076 #define T_function " function"
1077 #define Tfunction "function"
1078 #define T_funny_command "funny $()-command"
1079 #define Tgetopts "getopts"
1080 #define Thistory "history"
1081 #define Tintovfl "integer overflow %zu %c %zu prevented"
1082 #define Tinvname "%s: invalid %s name"
1083 #define Tjobs "jobs"
1084 #define Tjob_not_started "job not started"
1085 #define Tmksh "mksh"
1086 #define Tname "name"
1087 #define Tno_args "missing argument"
1088 #define Tno_OLDPWD "no OLDPWD"
1089 #define Tnot_ident "is not an identifier"
1090 #define Tnot_in_history "not in history"
1091 #define Tnot_found_s "%s not found"
1092 #define Tnot_found "not found"
1093 #define Tnot_started "not started"
1094 #define TOLDPWD "OLDPWD"
1095 #define Topen "open"
1096 #define TPATH "PATH"
1097 #define Tpv "pv"
1098 #define TpVv "Vpv"
1099 #define TPWD "PWD"
1100 #define Tread "read"
1101 #define Tdsgreadonly "^*=readonly"
1102 #define Treadonly "readonly"
1103 #define Tredirection_dup "can't finish (dup) redirection"
1104 #define Tredirection "redirection"
1105 #define Treal_sp1 "real "
1106 #define Treal_sp2 " real "
1107 #define Treq_arg "requires an argument"
1108 #define Tselect "select"
1109 #define Tsgset "*=set"
1110 #define Tset "set"
1111 #define Tsh "sh"
1112 #define TSHELL "SHELL"
1113 #define Tshell "shell"
1114 #define Tshf_read "shf_read"
1115 #define Tshf_write "shf_write"
1116 #define Tgsource "=source"
1117 #define Tsource "source"
1118 #define Tj_suspend "j_suspend"
1119 #define Tsuspend "suspend"
1120 #define Tsynerr "syntax error"
1121 #define Ttime "time"
1122 #define Ttoo_many_args "too many arguments"
1123 #define Ttoo_many_files "too many open files in shell"
1124 #define Ttrue "true"
1125 #define Ttty_fd_dupof "dup of tty fd"
1126 #define Ttty_fd "tty fd"
1127 #define Tdgtypeset "^=typeset"
1128 #define Ttypeset "typeset"
1129 #define Tugo "ugo"
1130 #define Tunalias "unalias"
1131 #define Tunexpected "unexpected"
1132 #define Tunexpected_type "%s: unexpected %s type %d"
1133 #define Tunknown_option "unknown option"
1134 #define Tunwind "unwind"
1135 #define Tuser_sp1 "user "
1136 #define Tuser_sp2 " user "
1137 #define Twrite "write"
1138 #define Tf__S " %S"
1139 #define Tf__d " %d"
1140 #define Tf__ss " %s%s"
1141 #define Tf__sN " %s\n"
1142 #define Tf_sSs "%s/%s"
1143 #define Tf_T "%T"
1144 #define Tf_dN "%d\n"
1145 #define Tf_s_ "%s "
1146 #define Tf_s_T "%s %T"
1147 #define Tf_s_s_sN "%s %s %s\n"
1148 #define Tf_s_s "%s %s"
1149 #define Tf_s_sD_s "%s %s: %s"
1150 #define Tf_optfoo "%s%s-%c: %s"
1151 #define Tf_sD_ "%s: "
1152 #define Tf_szs "%s: %zd %s"
1153 #define Tf_parm "%s: parameter not set"
1154 #define Tf_coproc "-p: %s"
1155 #define Tf_cant_s "%s: can't %s"
1156 #define Tf_cant_ss_s "can't %s %s: %s"
1157 #define Tf_heredoc "here document '%s' unclosed"
1158 #if HAVE_MKNOD
1159 #define Tf_nonnum "non-numeric %s %s '%s'"
1160 #endif
1161 #define Tf_S_ "%S "
1162 #define Tf_S "%S"
1163 #define Tf_lu "%lu"
1164 #define Tf_toolarge "%s %s too large: %lu"
1165 #define Tf_ldfailed "%s %s(%d, %ld) failed: %s"
1166 #define Tf_ss "%s%s"
1167 #define Tf_sss "%s%s%s"
1168 #define Tf_sD_s_sD_s "%s: %s %s: %s"
1169 #define Tf_toomany "too many %ss"
1170 #define Tf_sd "%s %d"
1171 #define Tf_s "%s"
1172 #define Tft_end "%;"
1173 #define Tft_R "%R"
1174 #define Tf_d "%d"
1175 #define Tf_sD_s_qs "%s: %s '%s'"
1176 #define Tf_ro "read-only: %s"
1177 #define Tf_flags "%s: flags 0x%X"
1178 #define Tf_temp "can't %s temporary file %s: %s"
1179 #define Tf_ssfaileds "%s: %s failed: %s"
1180 #define Tf_sD_sD_s "%s: %s: %s"
1181 #define Tf__c_ "-%c "
1182 #define Tf_sD_s_s "%s: %s %s"
1183 #define Tf_sN "%s\n"
1184 #define Tf_sD_s "%s: %s"
1185 #define T_devtty "/dev/tty"
1186 #endif /* end of string pooling */
1187
1188 typedef uint8_t Temp_type;
1189 /* expanded heredoc */
1190 #define TT_HEREDOC_EXP 0
1191 /* temporary file used for history editing (fc -e) */
1192 #define TT_HIST_EDIT 1
1193 /* temporary file used during in-situ command substitution */
1194 #define TT_FUNSUB 2
1195
1196 /* temp/heredoc files. The file is removed when the struct is freed. */
1197 struct temp {
1198 struct temp *next;
1199 struct shf *shf;
1200 /* pid of process parsed here-doc */
1201 pid_t pid;
1202 Temp_type type;
1203 /* actually longer: name (variable length) */
1204 char tffn[3];
1205 };
1206
1207 /*
1208 * stdio and our IO routines
1209 */
1210
1211 #define shl_xtrace (&shf_iob[0]) /* for set -x */
1212 #define shl_stdout (&shf_iob[1])
1213 #define shl_out (&shf_iob[2])
1214 #ifdef DF
1215 #define shl_dbg (&shf_iob[3]) /* for DF() */
1216 #endif
1217 EXTERN bool shl_stdout_ok;
1218
1219 /*
1220 * trap handlers
1221 */
1222 typedef struct trap {
1223 const char *name; /* short name */
1224 const char *mess; /* descriptive name */
1225 char *trap; /* trap command */
1226 sig_t cursig; /* current handler (valid if TF_ORIG_* set) */
1227 sig_t shtrap; /* shell signal handler */
1228 int signal; /* signal number */
1229 int flags; /* TF_* */
1230 volatile sig_atomic_t set; /* trap pending */
1231 } Trap;
1232
1233 /* values for Trap.flags */
1234 #define TF_SHELL_USES BIT(0) /* shell uses signal, user can't change */
1235 #define TF_USER_SET BIT(1) /* user has (tried to) set trap */
1236 #define TF_ORIG_IGN BIT(2) /* original action was SIG_IGN */
1237 #define TF_ORIG_DFL BIT(3) /* original action was SIG_DFL */
1238 #define TF_EXEC_IGN BIT(4) /* restore SIG_IGN just before exec */
1239 #define TF_EXEC_DFL BIT(5) /* restore SIG_DFL just before exec */
1240 #define TF_DFL_INTR BIT(6) /* when received, default action is LINTR */
1241 #define TF_TTY_INTR BIT(7) /* tty generated signal (see j_waitj) */
1242 #define TF_CHANGED BIT(8) /* used by runtrap() to detect trap changes */
1243 #define TF_FATAL BIT(9) /* causes termination if not trapped */
1244
1245 /* values for setsig()/setexecsig() flags argument */
1246 #define SS_RESTORE_MASK 0x3 /* how to restore a signal before an exec() */
1247 #define SS_RESTORE_CURR 0 /* leave current handler in place */
1248 #define SS_RESTORE_ORIG 1 /* restore original handler */
1249 #define SS_RESTORE_DFL 2 /* restore to SIG_DFL */
1250 #define SS_RESTORE_IGN 3 /* restore to SIG_IGN */
1251 #define SS_FORCE BIT(3) /* set signal even if original signal ignored */
1252 #define SS_USER BIT(4) /* user is doing the set (ie, trap command) */
1253 #define SS_SHTRAP BIT(5) /* trap for internal use (ALRM, CHLD, WINCH) */
1254
1255 #define ksh_SIGEXIT 0 /* for trap EXIT */
1256 #define ksh_SIGERR ksh_NSIG /* for trap ERR */
1257
1258 EXTERN volatile sig_atomic_t trap; /* traps pending? */
1259 EXTERN volatile sig_atomic_t intrsig; /* pending trap interrupts command */
1260 EXTERN volatile sig_atomic_t fatal_trap; /* received a fatal signal */
1261 extern Trap sigtraps[ksh_NSIG + 1];
1262
1263 /* got_winch = 1 when we need to re-adjust the window size */
1264 #ifdef SIGWINCH
1265 EXTERN volatile sig_atomic_t got_winch E_INIT(1);
1266 #else
1267 #define got_winch true
1268 #endif
1269
1270 /*
1271 * TMOUT support
1272 */
1273 /* values for ksh_tmout_state */
1274 enum tmout_enum {
1275 TMOUT_EXECUTING = 0, /* executing commands */
1276 TMOUT_READING, /* waiting for input */
1277 TMOUT_LEAVING /* have timed out */
1278 };
1279 EXTERN unsigned int ksh_tmout;
1280 EXTERN enum tmout_enum ksh_tmout_state E_INIT(TMOUT_EXECUTING);
1281
1282 /* For "You have stopped jobs" message */
1283 EXTERN bool really_exit;
1284
1285 /*
1286 * fast character classes
1287 */
1288 #define C_ALPHX BIT(0) /* A-Za-z_ */
1289 #define C_DIGIT BIT(1) /* 0-9 */
1290 #define C_LEX1 BIT(2) /* \t \n\0|&;<>() */
1291 #define C_VAR1 BIT(3) /* *@#!$-? */
1292 #define C_IFSWS BIT(4) /* \t \n (IFS white space) */
1293 #define C_SUBOP1 BIT(5) /* "=-+?" */
1294 #define C_QUOTE BIT(6) /* \t\n "#$&'()*;<=>?[\]`| (needing quoting) */
1295 #define C_IFS BIT(7) /* $IFS */
1296
1297 extern unsigned char chtypes[];
1298
1299 #define ctype(c, t) tobool(chtypes[(unsigned char)(c)] & (t))
1300 #define ord(c) ((int)(unsigned char)(c))
1301 #define ksh_issubop2(c) tobool((c) == ord('#') || (c) == ord('%'))
1302 #define ksh_isalias(c) (ctype((c), C_ALPHX | C_DIGIT) || (c) == ord('!') || \
1303 (c) == ord('%') || (c) == ord(',') || \
1304 (c) == ord('@') || (c) == ord('-'))
1305 #define ksh_isalpha(c) (ctype((c), C_ALPHX) && (c) != ord('_'))
1306 #define ksh_isalphx(c) ctype((c), C_ALPHX)
1307 #define ksh_isalnux(c) ctype((c), C_ALPHX | C_DIGIT)
1308 #define ksh_isdigit(c) ctype((c), C_DIGIT)
1309 #define ksh_islower(c) (((c) >= 'a') && ((c) <= 'z'))
1310 #define ksh_isupper(c) (((c) >= 'A') && ((c) <= 'Z'))
1311 #define ksh_tolower(c) (ksh_isupper(c) ? (c) - 'A' + 'a' : (c))
1312 #define ksh_toupper(c) (ksh_islower(c) ? (c) - 'a' + 'A' : (c))
1313 #define ksh_isdash(s) (((s)[0] == '-') && ((s)[1] == '\0'))
1314 #define ksh_isspace(c) ((((c) >= 0x09) && ((c) <= 0x0D)) || ((c) == 0x20))
1315 #define ksh_eq(c,u,l) (((c) | 0x20) == (l))
1316 #define ksh_numdig(c) ((c) - ord('0'))
1317 #define ksh_numuc(c) ((c) - ord('A'))
1318 #define ksh_numlc(c) ((c) - ord('a'))
1319
1320 EXTERN int ifs0 E_INIT(' '); /* for "$*" */
1321
1322 /* Argument parsing for built-in commands and getopts command */
1323
1324 /* Values for Getopt.flags */
1325 #define GF_ERROR BIT(0) /* call errorf() if there is an error */
1326 #define GF_PLUSOPT BIT(1) /* allow +c as an option */
1327 #define GF_NONAME BIT(2) /* don't print argv[0] in errors */
1328
1329 /* Values for Getopt.info */
1330 #define GI_MINUS BIT(0) /* an option started with -... */
1331 #define GI_PLUS BIT(1) /* an option started with +... */
1332 #define GI_MINUSMINUS BIT(2) /* arguments were ended with -- */
1333
1334 /* in case some OS defines these */
1335 #undef optarg
1336 #undef optind
1337
1338 typedef struct {
1339 const char *optarg;
1340 int optind;
1341 int uoptind; /* what user sees in $OPTIND */
1342 int flags; /* see GF_* */
1343 int info; /* see GI_* */
1344 unsigned int p; /* 0 or index into argv[optind - 1] */
1345 char buf[2]; /* for bad option OPTARG value */
1346 } Getopt;
1347
1348 EXTERN Getopt builtin_opt; /* for shell builtin commands */
1349 EXTERN Getopt user_opt; /* parsing state for getopts builtin command */
1350
1351 /* This for co-processes */
1352
1353 /* something that won't (realisticly) wrap */
1354 typedef int Coproc_id;
1355
1356 struct coproc {
1357 void *job; /* 0 or job of co-process using input pipe */
1358 int read; /* pipe from co-process's stdout */
1359 int readw; /* other side of read (saved temporarily) */
1360 int write; /* pipe to co-process's stdin */
1361 int njobs; /* number of live jobs using output pipe */
1362 Coproc_id id; /* id of current output pipe */
1363 };
1364 EXTERN struct coproc coproc;
1365
1366 #ifndef MKSH_NOPROSPECTOFWORK
1367 /* used in jobs.c and by coprocess stuff in exec.c and select() calls */
1368 EXTERN sigset_t sm_default, sm_sigchld;
1369 #endif
1370
1371 /* name of called builtin function (used by error functions) */
1372 EXTERN const char *builtin_argv0;
1373 /* is called builtin a POSIX special builtin? (error functions only) */
1374 EXTERN bool builtin_spec;
1375
1376 /* current working directory */
1377 EXTERN char *current_wd;
1378
1379 /* input line size */
1380 #ifdef MKSH_SMALL
1381 #define LINE (4096 - ALLOC_OVERHEAD)
1382 #else
1383 #define LINE (16384 - ALLOC_OVERHEAD)
1384 #endif
1385 /* columns and lines of the tty */
1386 EXTERN mksh_ari_t x_cols E_INIT(80);
1387 EXTERN mksh_ari_t x_lins E_INIT(24);
1388
1389
1390 /* Determine the location of the system (common) profile */
1391
1392 #ifndef MKSH_DEFAULT_PROFILEDIR
1393 #define MKSH_DEFAULT_PROFILEDIR MKSH_UNIXROOT "/etc"
1394 #endif
1395
1396 #define MKSH_SYSTEM_PROFILE MKSH_DEFAULT_PROFILEDIR "/profile"
1397 #define MKSH_SUID_PROFILE MKSH_DEFAULT_PROFILEDIR "/suid_profile"
1398
1399
1400 /* Used by v_evaluate() and setstr() to control action when error occurs */
1401 #define KSH_UNWIND_ERROR 0 /* unwind the stack (kshlongjmp) */
1402 #define KSH_RETURN_ERROR 1 /* return 1/0 for success/failure */
1403
1404 /*
1405 * Shell file I/O routines
1406 */
1407
1408 #define SHF_BSIZE 512
1409
1410 #define shf_fileno(shf) ((shf)->fd)
1411 #define shf_setfileno(shf,nfd) ((shf)->fd = (nfd))
1412 #define shf_getc_i(shf) ((shf)->rnleft > 0 ? \
1413 (shf)->rnleft--, *(shf)->rp++ : \
1414 shf_getchar(shf))
1415 #define shf_putc_i(c, shf) ((shf)->wnleft == 0 ? \
1416 shf_putchar((uint8_t)(c), (shf)) : \
1417 ((shf)->wnleft--, *(shf)->wp++ = (c)))
1418 #define shf_eof(shf) ((shf)->flags & SHF_EOF)
1419 #define shf_error(shf) ((shf)->flags & SHF_ERROR)
1420 #define shf_errno(shf) ((shf)->errnosv)
1421 #define shf_clearerr(shf) ((shf)->flags &= ~(SHF_EOF | SHF_ERROR))
1422
1423 /* Flags passed to shf_*open() */
1424 #define SHF_RD 0x0001
1425 #define SHF_WR 0x0002
1426 #define SHF_RDWR (SHF_RD|SHF_WR)
1427 #define SHF_ACCMODE 0x0003 /* mask */
1428 #define SHF_GETFL 0x0004 /* use fcntl() to figure RD/WR flags */
1429 #define SHF_UNBUF 0x0008 /* unbuffered I/O */
1430 #define SHF_CLEXEC 0x0010 /* set close on exec flag */
1431 #define SHF_MAPHI 0x0020 /* make fd > FDBASE (and close orig)
1432 * (shf_open() only) */
1433 #define SHF_DYNAMIC 0x0040 /* string: increase buffer as needed */
1434 #define SHF_INTERRUPT 0x0080 /* EINTR in read/write causes error */
1435 /* Flags used internally */
1436 #define SHF_STRING 0x0100 /* a string, not a file */
1437 #define SHF_ALLOCS 0x0200 /* shf and shf->buf were alloc()ed */
1438 #define SHF_ALLOCB 0x0400 /* shf->buf was alloc()ed */
1439 #define SHF_ERROR 0x0800 /* read()/write() error */
1440 #define SHF_EOF 0x1000 /* read eof (sticky) */
1441 #define SHF_READING 0x2000 /* currently reading: rnleft,rp valid */
1442 #define SHF_WRITING 0x4000 /* currently writing: wnleft,wp valid */
1443
1444
1445 struct shf {
1446 Area *areap; /* area shf/buf were allocated in */
1447 unsigned char *rp; /* read: current position in buffer */
1448 unsigned char *wp; /* write: current position in buffer */
1449 unsigned char *buf; /* buffer */
1450 ssize_t bsize; /* actual size of buf */
1451 ssize_t rbsize; /* size of buffer (1 if SHF_UNBUF) */
1452 ssize_t rnleft; /* read: how much data left in buffer */
1453 ssize_t wbsize; /* size of buffer (0 if SHF_UNBUF) */
1454 ssize_t wnleft; /* write: how much space left in buffer */
1455 int flags; /* see SHF_* */
1456 int fd; /* file descriptor */
1457 int errnosv; /* saved value of errno after error */
1458 };
1459
1460 extern struct shf shf_iob[];
1461
1462 struct table {
1463 Area *areap; /* area to allocate entries */
1464 struct tbl **tbls; /* hashed table items */
1465 size_t nfree; /* free table entries */
1466 uint8_t tshift; /* table size (2^tshift) */
1467 };
1468
1469 /* table item */
1470 struct tbl {
1471 /* Area to allocate from */
1472 Area *areap;
1473 /* value */
1474 union {
1475 char *s; /* string */
1476 mksh_ari_t i; /* integer */
1477 mksh_uari_t u; /* unsigned integer */
1478 int (*f)(const char **); /* built-in command */
1479 struct op *t; /* "function" tree */
1480 } val;
1481 union {
1482 struct tbl *array; /* array values */
1483 const char *fpath; /* temporary path to undef function */
1484 } u;
1485 union {
1486 int field; /* field with for -L/-R/-Z */
1487 int errnov; /* CEXEC/CTALIAS */
1488 } u2;
1489 union {
1490 uint32_t hval; /* hash(name) */
1491 uint32_t index; /* index for an array */
1492 } ua;
1493 /*
1494 * command type (see below), base (if INTEGER),
1495 * offset from val.s of value (if EXPORT)
1496 */
1497 int type;
1498 /* flags (see below) */
1499 uint32_t flag;
1500
1501 /* actually longer: name (variable length) */
1502 char name[4];
1503 };
1504
1505 EXTERN struct tbl *vtemp;
1506 /* set by isglobal(), global() and local() */
1507 EXTERN bool last_lookup_was_array;
1508
1509 /* common flag bits */
1510 #define ALLOC BIT(0) /* val.s has been allocated */
1511 #define DEFINED BIT(1) /* is defined in block */
1512 #define ISSET BIT(2) /* has value, vp->val.[si] */
1513 #define EXPORT BIT(3) /* exported variable/function */
1514 #define TRACE BIT(4) /* var: user flagged, func: execution tracing */
1515 /* (start non-common flags at 8) */
1516 /* flag bits used for variables */
1517 #define SPECIAL BIT(8) /* PATH, IFS, SECONDS, etc */
1518 #define INTEGER BIT(9) /* val.i contains integer value */
1519 #define RDONLY BIT(10) /* read-only variable */
1520 #define LOCAL BIT(11) /* for local typeset() */
1521 #define ARRAY BIT(13) /* array */
1522 #define LJUST BIT(14) /* left justify */
1523 #define RJUST BIT(15) /* right justify */
1524 #define ZEROFIL BIT(16) /* 0 filled if RJUSTIFY, strip 0s if LJUSTIFY */
1525 #define LCASEV BIT(17) /* convert to lower case */
1526 #define UCASEV_AL BIT(18) /* convert to upper case / autoload function */
1527 #define INT_U BIT(19) /* unsigned integer */
1528 #define INT_L BIT(20) /* long integer (no-op but used as magic) */
1529 #define IMPORT BIT(21) /* flag to typeset(): no arrays, must have = */
1530 #define LOCAL_COPY BIT(22) /* with LOCAL - copy attrs from existing var */
1531 #define EXPRINEVAL BIT(23) /* contents currently being evaluated */
1532 #define EXPRLVALUE BIT(24) /* useable as lvalue (temp flag) */
1533 #define AINDEX BIT(25) /* array index >0 = ua.index filled in */
1534 #define ASSOC BIT(26) /* ARRAY ? associative : reference */
1535 /* flag bits used for taliases/builtins/aliases/keywords/functions */
1536 #define KEEPASN BIT(8) /* keep command assignments (eg, var=x cmd) */
1537 #define FINUSE BIT(9) /* function being executed */
1538 #define FDELETE BIT(10) /* function deleted while it was executing */
1539 #define FKSH BIT(11) /* function defined with function x (vs x()) */
1540 #define SPEC_BI BIT(12) /* a POSIX special builtin */
1541 #define LOWER_BI BIT(13) /* (with LOW_BI) override even w/o flags */
1542 #define LOW_BI BIT(14) /* external utility overrides built-in one */
1543 #define DECL_UTIL BIT(15) /* is declaration utility */
1544 #define DECL_FWDR BIT(16) /* is declaration utility forwarder */
1545
1546 /*
1547 * Attributes that can be set by the user (used to decide if an unset
1548 * param should be repoted by set/typeset). Does not include ARRAY or
1549 * LOCAL.
1550 */
1551 #define USERATTRIB (EXPORT|INTEGER|RDONLY|LJUST|RJUST|ZEROFIL|\
1552 LCASEV|UCASEV_AL|INT_U|INT_L)
1553
1554 #define arrayindex(vp) ((unsigned long)((vp)->flag & AINDEX ? \
1555 (vp)->ua.index : 0))
1556
1557 enum namerefflag {
1558 SRF_NOP,
1559 SRF_ENABLE,
1560 SRF_DISABLE
1561 };
1562
1563 /* command types */
1564 #define CNONE 0 /* undefined */
1565 #define CSHELL 1 /* built-in */
1566 #define CFUNC 2 /* function */
1567 #define CEXEC 4 /* executable command */
1568 #define CALIAS 5 /* alias */
1569 #define CKEYWD 6 /* keyword */
1570 #define CTALIAS 7 /* tracked alias */
1571
1572 /* Flags for findcom()/comexec() */
1573 #define FC_SPECBI BIT(0) /* special builtin */
1574 #define FC_FUNC BIT(1) /* function */
1575 #define FC_NORMBI BIT(2) /* not special builtin */
1576 #define FC_BI (FC_SPECBI | FC_NORMBI)
1577 #define FC_PATH BIT(3) /* do path search */
1578 #define FC_DEFPATH BIT(4) /* use default path in path search */
1579 #define FC_WHENCE BIT(5) /* for use by command and whence */
1580
1581 #define AF_ARGV_ALLOC 0x1 /* argv[] array allocated */
1582 #define AF_ARGS_ALLOCED 0x2 /* argument strings allocated */
1583 #define AI_ARGV(a, i) ((i) == 0 ? (a).argv[0] : (a).argv[(i) - (a).skip])
1584 #define AI_ARGC(a) ((a).ai_argc - (a).skip)
1585
1586 /* Argument info. Used for $#, $* for shell, functions, includes, etc. */
1587 struct arg_info {
1588 const char **argv;
1589 int flags; /* AF_* */
1590 int ai_argc;
1591 int skip; /* first arg is argv[0], second is argv[1 + skip] */
1592 };
1593
1594 /*
1595 * activation record for function blocks
1596 */
1597 struct block {
1598 Area area; /* area to allocate things */
1599 const char **argv;
1600 char *error; /* error handler */
1601 char *exit; /* exit handler */
1602 struct block *next; /* enclosing block */
1603 struct table vars; /* local variables */
1604 struct table funs; /* local functions */
1605 Getopt getopts_state;
1606 int argc;
1607 int flags; /* see BF_* */
1608 };
1609
1610 /* Values for struct block.flags */
1611 #define BF_DOGETOPTS BIT(0) /* save/restore getopts state */
1612 #define BF_STOPENV BIT(1) /* do not export further */
1613
1614 /*
1615 * Used by ktwalk() and ktnext() routines.
1616 */
1617 struct tstate {
1618 struct tbl **next;
1619 ssize_t left;
1620 };
1621
1622 EXTERN struct table taliases; /* tracked aliases */
1623 EXTERN struct table builtins; /* built-in commands */
1624 EXTERN struct table aliases; /* aliases */
1625 EXTERN struct table keywords; /* keywords */
1626 #ifndef MKSH_NOPWNAM
1627 EXTERN struct table homedirs; /* homedir() cache */
1628 #endif
1629
1630 struct builtin {
1631 const char *name;
1632 int (*func)(const char **);
1633 };
1634
1635 extern const struct builtin mkshbuiltins[];
1636
1637 /* values for set_prompt() */
1638 #define PS1 0 /* command */
1639 #define PS2 1 /* command continuation */
1640
1641 EXTERN char *path; /* copy of either PATH or def_path */
1642 EXTERN const char *def_path; /* path to use if PATH not set */
1643 EXTERN char *tmpdir; /* TMPDIR value */
1644 EXTERN const char *prompt;
1645 EXTERN uint8_t cur_prompt; /* PS1 or PS2 */
1646 EXTERN int current_lineno; /* LINENO value */
1647
1648 /*
1649 * Description of a command or an operation on commands.
1650 */
1651 struct op {
1652 const char **args; /* arguments to a command */
1653 char **vars; /* variable assignments */
1654 struct ioword **ioact; /* IO actions (eg, < > >>) */
1655 struct op *left, *right; /* descendents */
1656 char *str; /* word for case; identifier for for,
1657 * select, and functions;
1658 * path to execute for TEXEC;
1659 * time hook for TCOM.
1660 */
1661 int lineno; /* TCOM/TFUNC: LINENO for this */
1662 short type; /* operation type, see below */
1663 /* WARNING: newtp(), tcopy() use evalflags = 0 to clear union */
1664 union {
1665 /* TCOM: arg expansion eval() flags */
1666 short evalflags;
1667 /* TFUNC: function x (vs x()) */
1668 short ksh_func;
1669 /* TPAT: termination character */
1670 char charflag;
1671 } u;
1672 };
1673
1674 /* Tree.type values */
1675 #define TEOF 0
1676 #define TCOM 1 /* command */
1677 #define TPAREN 2 /* (c-list) */
1678 #define TPIPE 3 /* a | b */
1679 #define TLIST 4 /* a ; b */
1680 #define TOR 5 /* || */
1681 #define TAND 6 /* && */
1682 #define TBANG 7 /* ! */
1683 #define TDBRACKET 8 /* [[ .. ]] */
1684 #define TFOR 9
1685 #define TSELECT 10
1686 #define TCASE 11
1687 #define TIF 12
1688 #define TWHILE 13
1689 #define TUNTIL 14
1690 #define TELIF 15
1691 #define TPAT 16 /* pattern in case */
1692 #define TBRACE 17 /* {c-list} */
1693 #define TASYNC 18 /* c & */
1694 #define TFUNCT 19 /* function name { command; } */
1695 #define TTIME 20 /* time pipeline */
1696 #define TEXEC 21 /* fork/exec eval'd TCOM */
1697 #define TCOPROC 22 /* coprocess |& */
1698
1699 /*
1700 * prefix codes for words in command tree
1701 */
1702 #define EOS 0 /* end of string */
1703 #define CHAR 1 /* unquoted character */
1704 #define QCHAR 2 /* quoted character */
1705 #define COMSUB 3 /* $() substitution (0 terminated) */
1706 #define EXPRSUB 4 /* $(()) substitution (0 terminated) */
1707 #define OQUOTE 5 /* opening " or ' */
1708 #define CQUOTE 6 /* closing " or ' */
1709 #define OSUBST 7 /* opening ${ subst (followed by { or X) */
1710 #define CSUBST 8 /* closing } of above (followed by } or X) */
1711 #define OPAT 9 /* open pattern: *(, @(, etc. */
1712 #define SPAT 10 /* separate pattern: | */
1713 #define CPAT 11 /* close pattern: ) */
1714 #define ADELIM 12 /* arbitrary delimiter: ${foo:2:3} ${foo/bar/baz} */
1715 #define FUNSUB 14 /* ${ foo;} substitution (NUL terminated) */
1716 #define VALSUB 15 /* ${|foo;} substitution (NUL terminated) */
1717 #define COMASUB 16 /* `…` substitution (COMSUB but expand aliases) */
1718 #define FUNASUB 17 /* function substitution but expand aliases */
1719
1720 /*
1721 * IO redirection
1722 */
1723 struct ioword {
1724 char *ioname; /* filename (unused if heredoc) */
1725 char *delim; /* delimiter for <<, <<- */
1726 char *heredoc; /* content of heredoc */
1727 unsigned short ioflag; /* action (below) */
1728 short unit; /* unit (fd) affected */
1729 };
1730
1731 /* ioword.flag - type of redirection */
1732 #define IOTYPE 0xF /* type: bits 0:3 */
1733 #define IOREAD 0x1 /* < */
1734 #define IOWRITE 0x2 /* > */
1735 #define IORDWR 0x3 /* <>: todo */
1736 #define IOHERE 0x4 /* << (here file) */
1737 #define IOCAT 0x5 /* >> */
1738 #define IODUP 0x6 /* <&/>& */
1739 #define IOEVAL BIT(4) /* expand in << */
1740 #define IOSKIP BIT(5) /* <<-, skip ^\t* */
1741 #define IOCLOB BIT(6) /* >|, override -o noclobber */
1742 #define IORDUP BIT(7) /* x<&y (as opposed to x>&y) */
1743 #define IONAMEXP BIT(8) /* name has been expanded */
1744 #define IOBASH BIT(9) /* &> etc. */
1745 #define IOHERESTR BIT(10) /* <<< (here string) */
1746 #define IONDELIM BIT(11) /* null delimiter (<<) */
1747
1748 /* execute/exchild flags */
1749 #define XEXEC BIT(0) /* execute without forking */
1750 #define XFORK BIT(1) /* fork before executing */
1751 #define XBGND BIT(2) /* command & */
1752 #define XPIPEI BIT(3) /* input is pipe */
1753 #define XPIPEO BIT(4) /* output is pipe */
1754 #define XXCOM BIT(5) /* `...` command */
1755 #define XPCLOSE BIT(6) /* exchild: close close_fd in parent */
1756 #define XCCLOSE BIT(7) /* exchild: close close_fd in child */
1757 #define XERROK BIT(8) /* non-zero exit ok (for set -e) */
1758 #define XCOPROC BIT(9) /* starting a co-process */
1759 #define XTIME BIT(10) /* timing TCOM command */
1760 #define XPIPEST BIT(11) /* want PIPESTATUS */
1761
1762 /*
1763 * flags to control expansion of words (assumed by t->evalflags to fit
1764 * in a short)
1765 */
1766 #define DOBLANK BIT(0) /* perform blank interpretation */
1767 #define DOGLOB BIT(1) /* expand [?* */
1768 #define DOPAT BIT(2) /* quote *?[ */
1769 #define DOTILDE BIT(3) /* normal ~ expansion (first char) */
1770 #define DONTRUNCOMMAND BIT(4) /* do not run $(command) things */
1771 #define DOASNTILDE BIT(5) /* assignment ~ expansion (after =, :) */
1772 #define DOBRACE BIT(6) /* used by expand(): do brace expansion */
1773 #define DOMAGIC BIT(7) /* used by expand(): string contains MAGIC */
1774 #define DOTEMP BIT(8) /* dito: in word part of ${..[%#=?]..} */
1775 #define DOVACHECK BIT(9) /* var assign check (for typeset, set, etc) */
1776 #define DOMARKDIRS BIT(10) /* force markdirs behaviour */
1777 #define DOTCOMEXEC BIT(11) /* not an eval flag, used by sh -c hack */
1778 #define DOSCALAR BIT(12) /* change field handling to non-list context */
1779 #define DOHEREDOC BIT(13) /* change scalar handling to heredoc body */
1780 #define DOHERESTR BIT(14) /* append a newline char */
1781
1782 #define X_EXTRA 20 /* this many extra bytes in X string */
1783
1784 typedef struct XString {
1785 /* beginning of string */
1786 char *beg;
1787 /* length of allocated area, minus safety margin */
1788 size_t len;
1789 /* end of string */
1790 char *end;
1791 /* memory area used */
1792 Area *areap;
1793 } XString;
1794
1795 /* initialise expandable string */
1796 #define XinitN(xs, length, area) do { \
1797 (xs).len = (length); \
1798 (xs).areap = (area); \
1799 (xs).beg = alloc((xs).len + X_EXTRA, (xs).areap); \
1800 (xs).end = (xs).beg + (xs).len; \
1801 } while (/* CONSTCOND */ 0)
1802 #define Xinit(xs, xp, length, area) do { \
1803 XinitN((xs), (length), (area)); \
1804 (xp) = (xs).beg; \
1805 } while (/* CONSTCOND */ 0)
1806
1807 /* stuff char into string */
1808 #define Xput(xs, xp, c) (*xp++ = (c))
1809
1810 /* check if there are at least n bytes left */
1811 #define XcheckN(xs, xp, n) do { \
1812 ssize_t more = ((xp) + (n)) - (xs).end; \
1813 if (more > 0) \
1814 (xp) = Xcheck_grow(&(xs), (xp), (size_t)more); \
1815 } while (/* CONSTCOND */ 0)
1816
1817 /* check for overflow, expand string */
1818 #define Xcheck(xs, xp) XcheckN((xs), (xp), 1)
1819
1820 /* free string */
1821 #define Xfree(xs, xp) afree((xs).beg, (xs).areap)
1822
1823 /* close, return string */
1824 #define Xclose(xs, xp) aresize((xs).beg, (xp) - (xs).beg, (xs).areap)
1825
1826 /* beginning of string */
1827 #define Xstring(xs, xp) ((xs).beg)
1828
1829 #define Xnleft(xs, xp) ((xs).end - (xp)) /* may be less than 0 */
1830 #define Xlength(xs, xp) ((xp) - (xs).beg)
1831 #define Xsize(xs, xp) ((xs).end - (xs).beg)
1832 #define Xsavepos(xs, xp) ((xp) - (xs).beg)
1833 #define Xrestpos(xs, xp, n) ((xs).beg + (n))
1834
1835 char *Xcheck_grow(XString *, const char *, size_t);
1836
1837 /*
1838 * expandable vector of generic pointers
1839 */
1840
1841 typedef struct {
1842 /* beginning of allocated area */
1843 void **beg;
1844 /* currently used number of entries */
1845 size_t len;
1846 /* allocated number of entries */
1847 size_t siz;
1848 } XPtrV;
1849
1850 #define XPinit(x, n) do { \
1851 (x).siz = (n); \
1852 (x).len = 0; \
1853 (x).beg = alloc2((x).siz, sizeof(void *), ATEMP); \
1854 } while (/* CONSTCOND */ 0) \
1855
1856 #define XPput(x, p) do { \
1857 if ((x).len == (x).siz) { \
1858 (x).beg = aresize2((x).beg, (x).siz, \
1859 2 * sizeof(void *), ATEMP); \
1860 (x).siz <<= 1; \
1861 } \
1862 (x).beg[(x).len++] = (p); \
1863 } while (/* CONSTCOND */ 0)
1864
1865 #define XPptrv(x) ((x).beg)
1866 #define XPsize(x) ((x).len)
1867 #define XPclose(x) aresize2((x).beg, XPsize(x), sizeof(void *), ATEMP)
1868 #define XPfree(x) afree((x).beg, ATEMP)
1869
1870 /* for print_columns */
1871
1872 struct columnise_opts {
1873 struct shf *shf;
1874 char linesep;
1875 bool do_last;
1876 bool prefcol;
1877 };
1878
1879 /*
1880 * Lexer internals
1881 */
1882
1883 typedef struct source Source;
1884 struct source {
1885 /* input buffer */
1886 XString xs;
1887 /* memory area, also checked in reclaim() */
1888 Area *areap;
1889 /* stacked source */
1890 Source *next;
1891 /* input pointer */
1892 const char *str;
1893 /* start of current buffer */
1894 const char *start;
1895 /* input file name */
1896 const char *file;
1897 /* extra data */
1898 union {
1899 /* string[] */
1900 const char **strv;
1901 /* shell file */
1902 struct shf *shf;
1903 /* alias (SF_HASALIAS) */
1904 struct tbl *tblp;
1905 /* (also for SREREAD) */
1906 char *freeme;
1907 } u;
1908 /* flags */
1909 int flags;
1910 /* input type */
1911 int type;
1912 /* line number */
1913 int line;
1914 /* line the error occurred on (0 if not set) */
1915 int errline;
1916 /* buffer for ungetsc() (SREREAD) and alias (SALIAS) */
1917 char ugbuf[2];
1918 };
1919
1920 /* Source.type values */
1921 #define SEOF 0 /* input EOF */
1922 #define SFILE 1 /* file input */
1923 #define SSTDIN 2 /* read stdin */
1924 #define SSTRING 3 /* string */
1925 #define SWSTR 4 /* string without \n */
1926 #define SWORDS 5 /* string[] */
1927 #define SWORDSEP 6 /* string[] separator */
1928 #define SALIAS 7 /* alias expansion */
1929 #define SREREAD 8 /* read ahead to be re-scanned */
1930 #define SSTRINGCMDLINE 9 /* string from "mksh -c ..." */
1931
1932 /* Source.flags values */
1933 #define SF_ECHO BIT(0) /* echo input to shlout */
1934 #define SF_ALIAS BIT(1) /* faking space at end of alias */
1935 #define SF_ALIASEND BIT(2) /* faking space at end of alias */
1936 #define SF_TTY BIT(3) /* type == SSTDIN & it is a tty */
1937 #define SF_HASALIAS BIT(4) /* u.tblp valid (SALIAS, SEOF) */
1938 #define SF_MAYEXEC BIT(5) /* special sh -c optimisation hack */
1939
1940 typedef union {
1941 int i;
1942 char *cp;
1943 char **wp;
1944 struct op *o;
1945 struct ioword *iop;
1946 } YYSTYPE;
1947
1948 /* If something is added here, add it to tokentab[] in syn.c as well */
1949 #define LWORD 256
1950 #define LOGAND 257 /* && */
1951 #define LOGOR 258 /* || */
1952 #define BREAK 259 /* ;; */
1953 #define IF 260
1954 #define THEN 261
1955 #define ELSE 262
1956 #define ELIF 263
1957 #define FI 264
1958 #define CASE 265
1959 #define ESAC 266
1960 #define FOR 267
1961 #define SELECT 268
1962 #define WHILE 269
1963 #define UNTIL 270
1964 #define DO 271
1965 #define DONE 272
1966 #define IN 273
1967 #define FUNCTION 274
1968 #define TIME 275
1969 #define REDIR 276
1970 #define MDPAREN 277 /* (( )) */
1971 #define BANG 278 /* ! */
1972 #define DBRACKET 279 /* [[ .. ]] */
1973 #define COPROC 280 /* |& */
1974 #define BRKEV 281 /* ;| */
1975 #define BRKFT 282 /* ;& */
1976 #define YYERRCODE 300
1977
1978 /* flags to yylex */
1979 #define CONTIN BIT(0) /* skip new lines to complete command */
1980 #define ONEWORD BIT(1) /* single word for substitute() */
1981 #define ALIAS BIT(2) /* recognise alias */
1982 #define KEYWORD BIT(3) /* recognise keywords */
1983 #define LETEXPR BIT(4) /* get expression inside (( )) */
1984 #define CMDASN BIT(5) /* parse x[1 & 2] as one word, for typeset */
1985 #define HEREDOC BIT(6) /* parsing a here document body */
1986 #define ESACONLY BIT(7) /* only accept esac keyword */
1987 #define CMDWORD BIT(8) /* parsing simple command (alias related) */
1988 #define HEREDELIM BIT(9) /* parsing <<,<<- delimiter */
1989 #define LQCHAR BIT(10) /* source string contains QCHAR */
1990
1991 #define HERES 10 /* max number of << in line */
1992
1993 #undef CTRL
1994 #define CTRL(x) ((x) == '?' ? 0x7F : (x) & 0x1F) /* ASCII */
1995 #define UNCTRL(x) ((x) ^ 0x40) /* ASCII */
1996 #define ISCTRL(x) (((signed char)((uint8_t)(x) + 1)) < 33)
1997
1998 #define IDENT 64
1999
2000 EXTERN Source *source; /* yyparse/yylex source */
2001 EXTERN YYSTYPE yylval; /* result from yylex */
2002 EXTERN struct ioword *heres[HERES], **herep;
2003 EXTERN char ident[IDENT + 1];
2004
2005 EXTERN char **history; /* saved commands */
2006 EXTERN char **histptr; /* last history item */
2007 EXTERN mksh_ari_t histsize; /* history size */
2008
2009 /* flags to histsave */
2010 #define HIST_FLUSH 0
2011 #define HIST_QUEUE 1
2012 #define HIST_APPEND 2
2013 #define HIST_STORE 3
2014 #define HIST_NOTE 4
2015
2016 /* user and system time of last j_waitjed job */
2017 EXTERN struct timeval j_usrtime, j_systime;
2018
2019 #define notok2mul(max, val, c) (((val) != 0) && ((c) != 0) && \
2020 (((max) / (c)) < (val)))
2021 #define notok2add(max, val, c) ((val) > ((max) - (c)))
2022 #define notoktomul(val, cnst) notok2mul(SIZE_MAX, (val), (cnst))
2023 #define notoktoadd(val, cnst) notok2add(SIZE_MAX, (val), (cnst))
2024 #define checkoktoadd(val, cnst) do { \
2025 if (notoktoadd((val), (cnst))) \
2026 internal_errorf(Tintovfl, (size_t)(val), \
2027 '+', (size_t)(cnst)); \
2028 } while (/* CONSTCOND */ 0)
2029
2030
2031 /* lalloc.c */
2032 void ainit(Area *);
2033 void afreeall(Area *);
2034 /* these cannot fail and can take NULL (not for ap) */
2035 #define alloc(n, ap) aresize(NULL, (n), (ap))
2036 #define alloc2(m, n, ap) aresize2(NULL, (m), (n), (ap))
2037 void *aresize(void *, size_t, Area *);
2038 void *aresize2(void *, size_t, size_t, Area *);
2039 void afree(void *, Area *); /* can take NULL */
2040 /* edit.c */
2041 #ifndef MKSH_NO_CMDLINE_EDITING
2042 #ifndef MKSH_SMALL
2043 int x_bind(const char *, const char *, bool, bool);
2044 #else
2045 int x_bind(const char *, const char *, bool);
2046 #endif
2047 void x_init(void);
2048 #ifdef DEBUG_LEAKS
2049 void x_done(void);
2050 #endif
2051 int x_read(char *);
2052 #endif
2053 void x_mkraw(int, mksh_ttyst *, bool);
2054 void x_initterm(const char *);
2055 /* eval.c */
2056 char *substitute(const char *, int);
2057 char **eval(const char **, int);
2058 char *evalstr(const char *cp, int);
2059 char *evalonestr(const char *cp, int);
2060 char *debunk(char *, const char *, size_t);
2061 void expand(const char *, XPtrV *, int);
2062 int glob_str(char *, XPtrV *, bool);
2063 char *do_tilde(char *);
2064 /* exec.c */
2065 int execute(struct op * volatile, volatile int, volatile int * volatile);
2066 int c_builtin(const char **);
2067 struct tbl *get_builtin(const char *);
2068 struct tbl *findfunc(const char *, uint32_t, bool);
2069 int define(const char *, struct op *);
2070 const char *builtin(const char *, int (*)(const char **));
2071 struct tbl *findcom(const char *, int);
2072 void flushcom(bool);
2073 int search_access(const char *, int);
2074 const char *search_path(const char *, const char *, int, int *);
2075 void pr_menu(const char * const *);
2076 void pr_list(struct columnise_opts *, char * const *);
2077 int herein(struct ioword *, char **);
2078 /* expr.c */
2079 int evaluate(const char *, mksh_ari_t *, int, bool);
2080 int v_evaluate(struct tbl *, const char *, volatile int, bool);
2081 /* UTF-8 stuff */
2082 size_t utf_mbtowc(unsigned int *, const char *);
2083 size_t utf_wctomb(char *, unsigned int);
2084 int utf_widthadj(const char *, const char **);
2085 size_t utf_mbswidth(const char *) MKSH_A_PURE;
2086 const char *utf_skipcols(const char *, int, int *);
2087 size_t utf_ptradj(const char *) MKSH_A_PURE;
2088 #ifdef MIRBSD_BOOTFLOPPY
2089 #define utf_wcwidth(i) wcwidth((wchar_t)(i))
2090 #else
2091 int utf_wcwidth(unsigned int) MKSH_A_PURE;
2092 #endif
2093 int ksh_access(const char *, int);
2094 struct tbl *tempvar(const char *);
2095 /* funcs.c */
2096 int c_hash(const char **);
2097 int c_pwd(const char **);
2098 int c_print(const char **);
2099 #ifdef MKSH_PRINTF_BUILTIN
2100 int c_printf(const char **);
2101 #endif
2102 int c_whence(const char **);
2103 int c_command(const char **);
2104 int c_typeset(const char **);
2105 bool valid_alias_name(const char *);
2106 int c_alias(const char **);
2107 int c_unalias(const char **);
2108 int c_let(const char **);
2109 int c_jobs(const char **);
2110 #ifndef MKSH_UNEMPLOYED
2111 int c_fgbg(const char **);
2112 #endif
2113 int c_kill(const char **);
2114 void getopts_reset(int);
2115 int c_getopts(const char **);
2116 #ifndef MKSH_NO_CMDLINE_EDITING
2117 int c_bind(const char **);
2118 #endif
2119 int c_shift(const char **);
2120 int c_umask(const char **);
2121 int c_dot(const char **);
2122 int c_wait(const char **);
2123 int c_read(const char **);
2124 int c_eval(const char **);
2125 int c_trap(const char **);
2126 int c_brkcont(const char **);
2127 int c_exitreturn(const char **);
2128 int c_set(const char **);
2129 int c_unset(const char **);
2130 int c_ulimit(const char **);
2131 int c_times(const char **);
2132 int timex(struct op *, int, volatile int *);
2133 void timex_hook(struct op *, char ** volatile *);
2134 int c_exec(const char **);
2135 int c_test(const char **);
2136 #if HAVE_MKNOD
2137 int c_mknod(const char **);
2138 #endif
2139 int c_realpath(const char **);
2140 int c_rename(const char **);
2141 int c_cat(const char **);
2142 int c_sleep(const char **);
2143 /* histrap.c */
2144 void init_histvec(void);
2145 void hist_init(Source *);
2146 #if HAVE_PERSISTENT_HISTORY
2147 void hist_finish(void);
2148 #endif
2149 void histsave(int *, const char *, int, bool);
2150 #if !defined(MKSH_SMALL) && HAVE_PERSISTENT_HISTORY
2151 bool histsync(void);
2152 #endif
2153 int c_fc(const char **);
2154 void sethistsize(mksh_ari_t);
2155 #if HAVE_PERSISTENT_HISTORY
2156 void sethistfile(const char *);
2157 #endif
2158 #if !defined(MKSH_NO_CMDLINE_EDITING) && !MKSH_S_NOVI
2159 char **histpos(void) MKSH_A_PURE;
2160 int histnum(int);
2161 #endif
2162 int findhist(int, int, const char *, bool) MKSH_A_PURE;
2163 char **hist_get_newest(bool);
2164 void inittraps(void);
2165 void alarm_init(void);
2166 Trap *gettrap(const char *, bool, bool);
2167 void trapsig(int);
2168 void intrcheck(void);
2169 int fatal_trap_check(void);
2170 int trap_pending(void);
2171 void runtraps(int intr);
2172 void runtrap(Trap *, bool);
2173 void cleartraps(void);
2174 void restoresigs(void);
2175 void settrap(Trap *, const char *);
2176 bool block_pipe(void);
2177 void restore_pipe(void);
2178 int setsig(Trap *, sig_t, int);
2179 void setexecsig(Trap *, int);
2180 #if HAVE_FLOCK || HAVE_LOCK_FCNTL
2181 void mksh_lockfd(int);
2182 void mksh_unlkfd(int);
2183 #endif
2184 /* jobs.c */
2185 void j_init(void);
2186 void j_exit(void);
2187 #ifndef MKSH_UNEMPLOYED
2188 void j_change(void);
2189 #endif
2190 int exchild(struct op *, int, volatile int *, int);
2191 void startlast(void);
2192 int waitlast(void);
2193 int waitfor(const char *, int *);
2194 int j_kill(const char *, int);
2195 #ifndef MKSH_UNEMPLOYED
2196 int j_resume(const char *, int);
2197 #endif
2198 #if !defined(MKSH_UNEMPLOYED) && HAVE_GETSID
2199 void j_suspend(void);
2200 #endif
2201 int j_jobs(const char *, int, int);
2202 void j_notify(void);
2203 pid_t j_async(void);
2204 int j_stopped_running(void);
2205 /* lex.c */
2206 int yylex(int);
2207 void yyskiputf8bom(void);
2208 void yyerror(const char *, ...)
2209 MKSH_A_NORETURN
2210 MKSH_A_FORMAT(__printf__, 1, 2);
2211 Source *pushs(int, Area *);
2212 void set_prompt(int, Source *);
2213 int pprompt(const char *, int);
2214 /* main.c */
2215 int include(const char *, int, const char **, bool);
2216 int command(const char *, int);
2217 int shell(Source * volatile, volatile int);
2218 /* argument MUST NOT be 0 */
2219 void unwind(int) MKSH_A_NORETURN;
2220 void newenv(int);
2221 void quitenv(struct shf *);
2222 void cleanup_parents_env(void);
2223 void cleanup_proc_env(void);
2224 void errorf(const char *, ...)
2225 MKSH_A_NORETURN
2226 MKSH_A_FORMAT(__printf__, 1, 2);
2227 void errorfx(int, const char *, ...)
2228 MKSH_A_NORETURN
2229 MKSH_A_FORMAT(__printf__, 2, 3);
2230 void warningf(bool, const char *, ...)
2231 MKSH_A_FORMAT(__printf__, 2, 3);
2232 void bi_errorf(const char *, ...)
2233 MKSH_A_FORMAT(__printf__, 1, 2);
2234 #define errorfz() errorf(NULL)
2235 #define errorfxz(rc) errorfx((rc), NULL)
2236 #define bi_errorfz() bi_errorf(NULL)
2237 void internal_errorf(const char *, ...)
2238 MKSH_A_NORETURN
2239 MKSH_A_FORMAT(__printf__, 1, 2);
2240 void internal_warningf(const char *, ...)
2241 MKSH_A_FORMAT(__printf__, 1, 2);
2242 void error_prefix(bool);
2243 void shellf(const char *, ...)
2244 MKSH_A_FORMAT(__printf__, 1, 2);
2245 void shprintf(const char *, ...)
2246 MKSH_A_FORMAT(__printf__, 1, 2);
2247 int can_seek(int);
2248 void initio(void);
2249 int ksh_dup2(int, int, bool);
2250 short savefd(int);
2251 void restfd(int, int);
2252 void openpipe(int *);
2253 void closepipe(int *);
2254 int check_fd(const char *, int, const char **);
2255 void coproc_init(void);
2256 void coproc_read_close(int);
2257 void coproc_readw_close(int);
2258 void coproc_write_close(int);
2259 int coproc_getfd(int, const char **);
2260 void coproc_cleanup(int);
2261 struct temp *maketemp(Area *, Temp_type, struct temp **);
2262 void ktinit(Area *, struct table *, uint8_t);
2263 struct tbl *ktscan(struct table *, const char *, uint32_t, struct tbl ***);
2264 /* table, name (key) to search for, hash(n) */
2265 #define ktsearch(tp, s, h) ktscan((tp), (s), (h), NULL)
2266 struct tbl *ktenter(struct table *, const char *, uint32_t);
2267 #define ktdelete(p) do { p->flag = 0; } while (/* CONSTCOND */ 0)
2268 void ktwalk(struct tstate *, struct table *);
2269 struct tbl *ktnext(struct tstate *);
2270 struct tbl **ktsort(struct table *);
2271 #ifdef DF
2272 void DF(const char *, ...)
2273 MKSH_A_FORMAT(__printf__, 1, 2);
2274 #endif
2275 /* misc.c */
2276 void setctypes(const char *, int);
2277 void initctypes(void);
2278 size_t option(const char *) MKSH_A_PURE;
2279 char *getoptions(void);
2280 void change_flag(enum sh_flag, int, bool);
2281 void change_xtrace(unsigned char, bool);
2282 int parse_args(const char **, int, bool *);
2283 int getn(const char *, int *);
2284 int gmatchx(const char *, const char *, bool);
2285 int has_globbing(const char *, const char *) MKSH_A_PURE;
2286 int xstrcmp(const void *, const void *) MKSH_A_PURE;
2287 void ksh_getopt_reset(Getopt *, int);
2288 int ksh_getopt(const char **, Getopt *, const char *);
2289 void print_value_quoted(struct shf *, const char *);
2290 char *quote_value(const char *);
2291 void print_columns(struct columnise_opts *, unsigned int,
2292 void (*)(char *, size_t, unsigned int, const void *),
2293 const void *, size_t, size_t);
2294 void strip_nuls(char *, size_t)
2295 MKSH_A_BOUNDED(__string__, 1, 2);
2296 ssize_t blocking_read(int, char *, size_t)
2297 MKSH_A_BOUNDED(__buffer__, 2, 3);
2298 int reset_nonblock(int);
2299 char *ksh_get_wd(void);
2300 char *do_realpath(const char *);
2301 void simplify_path(char *);
2302 void set_current_wd(const char *);
2303 int c_cd(const char **);
2304 #if defined(MKSH_SMALL) && !defined(MKSH_SMALL_BUT_FAST)
2305 char *strdup_i(const char *, Area *);
2306 char *strndup_i(const char *, size_t, Area *);
2307 #endif
2308 int unbksl(bool, int (*)(void), void (*)(int));
2309 #ifdef __OS2__
2310 /* os2.c */
2311 void os2_init(int *, const char ***);
2312 void setextlibpath(const char *, const char *);
2313 int access_ex(int (*)(const char *, int), const char *, int);
2314 int stat_ex(const char *, struct stat *);
2315 const char *real_exec_name(const char *);
2316 #endif
2317 /* shf.c */
2318 struct shf *shf_open(const char *, int, int, int);
2319 struct shf *shf_fdopen(int, int, struct shf *);
2320 struct shf *shf_reopen(int, int, struct shf *);
2321 struct shf *shf_sopen(char *, ssize_t, int, struct shf *);
2322 int shf_close(struct shf *);
2323 int shf_fdclose(struct shf *);
2324 char *shf_sclose(struct shf *);
2325 int shf_flush(struct shf *);
2326 ssize_t shf_read(char *, ssize_t, struct shf *);
2327 char *shf_getse(char *, ssize_t, struct shf *);
2328 int shf_getchar(struct shf *s);
2329 int shf_ungetc(int, struct shf *);
2330 #if defined(MKSH_SMALL) && !defined(MKSH_SMALL_BUT_FAST)
2331 int shf_getc(struct shf *);
2332 int shf_putc(int, struct shf *);
2333 #else
2334 #define shf_getc shf_getc_i
2335 #define shf_putc shf_putc_i
2336 #endif
2337 int shf_putchar(int, struct shf *);
2338 ssize_t shf_puts(const char *, struct shf *);
2339 ssize_t shf_write(const char *, ssize_t, struct shf *);
2340 ssize_t shf_fprintf(struct shf *, const char *, ...)
2341 MKSH_A_FORMAT(__printf__, 2, 3);
2342 ssize_t shf_snprintf(char *, ssize_t, const char *, ...)
2343 MKSH_A_FORMAT(__printf__, 3, 4)
2344 MKSH_A_BOUNDED(__string__, 1, 2);
2345 char *shf_smprintf(const char *, ...)
2346 MKSH_A_FORMAT(__printf__, 1, 2);
2347 ssize_t shf_vfprintf(struct shf *, const char *, va_list)
2348 MKSH_A_FORMAT(__printf__, 2, 0);
2349 /* syn.c */
2350 void initkeywords(void);
2351 struct op *compile(Source *, bool, bool);
2352 bool parse_usec(const char *, struct timeval *);
2353 char *yyrecursive(int);
2354 void yyrecursive_pop(bool);
2355 /* tree.c */
2356 void fptreef(struct shf *, int, const char *, ...);
2357 char *snptreef(char *, ssize_t, const char *, ...);
2358 struct op *tcopy(struct op *, Area *);
2359 char *wdcopy(const char *, Area *);
2360 const char *wdscan(const char *, int);
2361 #define WDS_TPUTS BIT(0) /* tputS (dumpwdvar) mode */
2362 char *wdstrip(const char *, int);
2363 void tfree(struct op *, Area *);
2364 void dumpchar(struct shf *, int);
2365 void dumptree(struct shf *, struct op *);
2366 void dumpwdvar(struct shf *, const char *);
2367 void dumpioact(struct shf *shf, struct op *t);
2368 void vistree(char *, size_t, struct op *)
2369 MKSH_A_BOUNDED(__string__, 1, 2);
2370 void fpFUNCTf(struct shf *, int, bool, const char *, struct op *);
2371 /* var.c */
2372 void newblock(void);
2373 void popblock(void);
2374 void initvar(void);
2375 struct block *varsearch(struct block *, struct tbl **, const char *, uint32_t);
2376 struct tbl *global(const char *);
2377 struct tbl *isglobal(const char *, bool);
2378 struct tbl *local(const char *, bool);
2379 char *str_val(struct tbl *);
2380 int setstr(struct tbl *, const char *, int);
2381 struct tbl *setint_v(struct tbl *, struct tbl *, bool);
2382 void setint(struct tbl *, mksh_ari_t);
2383 void setint_n(struct tbl *, mksh_ari_t, int);
2384 struct tbl *typeset(const char *, uint32_t, uint32_t, int, int);
2385 void unset(struct tbl *, int);
2386 const char *skip_varname(const char *, bool) MKSH_A_PURE;
2387 const char *skip_wdvarname(const char *, bool) MKSH_A_PURE;
2388 int is_wdvarname(const char *, bool) MKSH_A_PURE;
2389 int is_wdvarassign(const char *) MKSH_A_PURE;
2390 struct tbl *arraysearch(struct tbl *, uint32_t);
2391 char **makenv(void);
2392 void change_winsz(void);
2393 size_t array_ref_len(const char *) MKSH_A_PURE;
2394 char *arrayname(const char *);
2395 mksh_uari_t set_array(const char *, bool, const char **);
2396 uint32_t hash(const void *) MKSH_A_PURE;
2397 uint32_t chvt_rndsetup(const void *, size_t) MKSH_A_PURE;
2398 mksh_ari_t rndget(void);
2399 void rndset(unsigned long);
2400 void rndpush(const void *);
2401 void record_match(const char *);
2402
2403 enum Test_op {
2404 /* non-operator */
2405 TO_NONOP = 0,
2406 /* unary operators */
2407 TO_STNZE, TO_STZER, TO_ISSET, TO_OPTION,
2408 TO_FILAXST,
2409 TO_FILEXST,
2410 TO_FILREG, TO_FILBDEV, TO_FILCDEV, TO_FILSYM, TO_FILFIFO, TO_FILSOCK,
2411 TO_FILCDF, TO_FILID, TO_FILGID, TO_FILSETG, TO_FILSTCK, TO_FILUID,
2412 TO_FILRD, TO_FILGZ, TO_FILTT, TO_FILSETU, TO_FILWR, TO_FILEX,
2413 /* binary operators */
2414 TO_STEQL, TO_STNEQ, TO_STLT, TO_STGT, TO_INTEQ, TO_INTNE, TO_INTGT,
2415 TO_INTGE, TO_INTLT, TO_INTLE, TO_FILEQ, TO_FILNT, TO_FILOT,
2416 /* not an operator */
2417 TO_NONNULL /* !TO_NONOP */
2418 };
2419 typedef enum Test_op Test_op;
2420
2421 /* Used by Test_env.isa() (order important - used to index *_tokens[] arrays) */
2422 enum Test_meta {
2423 TM_OR, /* -o or || */
2424 TM_AND, /* -a or && */
2425 TM_NOT, /* ! */
2426 TM_OPAREN, /* ( */
2427 TM_CPAREN, /* ) */
2428 TM_UNOP, /* unary operator */
2429 TM_BINOP, /* binary operator */
2430 TM_END /* end of input */
2431 };
2432 typedef enum Test_meta Test_meta;
2433
2434 #define TEF_ERROR BIT(0) /* set if we've hit an error */
2435 #define TEF_DBRACKET BIT(1) /* set if [[ .. ]] test */
2436
2437 typedef struct test_env {
2438 union {
2439 const char **wp; /* used by ptest_* */
2440 XPtrV *av; /* used by dbtestp_* */
2441 } pos;
2442 const char **wp_end; /* used by ptest_* */
2443 Test_op (*isa)(struct test_env *, Test_meta);
2444 const char *(*getopnd) (struct test_env *, Test_op, bool);
2445 int (*eval)(struct test_env *, Test_op, const char *, const char *, bool);
2446 void (*error)(struct test_env *, int, const char *);
2447 int flags; /* TEF_* */
2448 } Test_env;
2449
2450 extern const char * const dbtest_tokens[];
2451
2452 Test_op test_isop(Test_meta, const char *) MKSH_A_PURE;
2453 int test_eval(Test_env *, Test_op, const char *, const char *, bool);
2454 int test_parse(Test_env *);
2455
2456 /* tty_fd is not opened O_BINARY, it's thus never read/written */
2457 EXTERN int tty_fd E_INIT(-1); /* dup'd tty file descriptor */
2458 EXTERN bool tty_devtty; /* true if tty_fd is from /dev/tty */
2459 EXTERN mksh_ttyst tty_state; /* saved tty state */
2460 EXTERN bool tty_hasstate; /* true if tty_state is valid */
2461
2462 extern int tty_init_fd(void); /* initialise tty_fd, tty_devtty */
2463
2464 #ifdef __OS2__
2465 #define binopen2(path,flags) __extension__({ \
2466 int binopen2_fd = open((path), (flags) | O_BINARY); \
2467 if (binopen2_fd >= 0) \
2468 setmode(binopen2_fd, O_BINARY); \
2469 (binopen2_fd); \
2470 })
2471 #define binopen3(path,flags,mode) __extension__({ \
2472 int binopen3_fd = open((path), (flags) | O_BINARY, (mode)); \
2473 if (binopen3_fd >= 0) \
2474 setmode(binopen3_fd, O_BINARY); \
2475 (binopen3_fd); \
2476 })
2477 #else
2478 #define binopen2(path,flags) open((path), (flags) | O_BINARY)
2479 #define binopen3(path,flags,mode) open((path), (flags) | O_BINARY, (mode))
2480 #endif
2481
2482 #ifdef MKSH_DOSPATH
2483 #define mksh_abspath(s) __extension__({ \
2484 const char *mksh_abspath_s = (s); \
2485 (mksh_cdirsep(mksh_abspath_s[0]) || \
2486 (ksh_isalpha(mksh_abspath_s[0]) && \
2487 mksh_abspath_s[1] == ':')); \
2488 })
2489 #define mksh_cdirsep(c) __extension__({ \
2490 char mksh_cdirsep_c = (c); \
2491 (mksh_cdirsep_c == '/' || mksh_cdirsep_c == '\\'); \
2492 })
2493 #define mksh_sdirsep(s) __extension__({ \
2494 const char *mksh_sdirsep_s = (s); \
2495 ((char *)((ksh_isalphx(mksh_sdirsep_s[0]) && \
2496 mksh_sdirsep_s[1] == ':' && \
2497 !mksh_cdirsep(mksh_sdirsep_s[2])) ? \
2498 (mksh_sdirsep_s + 1) : strpbrk(mksh_sdirsep_s, "/\\"))); \
2499 })
2500 #define mksh_vdirsep(s) (mksh_sdirsep((s)) != NULL)
2501 #else
2502 #define mksh_abspath(s) ((s)[0] == '/')
2503 #define mksh_cdirsep(c) ((c) == '/')
2504 #define mksh_sdirsep(s) strchr((s), '/')
2505 #define mksh_vdirsep(s) vstrchr((s), '/')
2506 #endif
2507
2508 /* be sure not to interfere with anyone else's idea about EXTERN */
2509 #ifdef EXTERN_DEFINED
2510 # undef EXTERN_DEFINED
2511 # undef EXTERN
2512 #endif
2513 #undef E_INIT
2514
2515 #endif /* !MKSH_INCLUDES_ONLY */
2516