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, 2018,
14 * 2019, 2020
15 * mirabilos <m@mirbsd.org>
16 *
17 * Provided that these terms and disclaimer and all copyright notices
18 * are retained or reproduced in an accompanying document, permission
19 * is granted to deal in this work without restriction, including un‐
20 * limited rights to use, publicly perform, distribute, sell, modify,
21 * merge, give away, or sublicence.
22 *
23 * This work is provided “AS IS” and WITHOUT WARRANTY of any kind, to
24 * the utmost extent permitted by applicable law, neither express nor
25 * implied; without malicious intent or gross negligence. In no event
26 * may a licensor, author or contributor be held liable for indirect,
27 * direct, other damage, loss, or other issues arising in any way out
28 * of dealing in the work, even if advised of the possibility of such
29 * damage or existence of a defect, except proven that it results out
30 * of said person’s immediate fault when using the work as intended.
31 */
32
33 #ifdef __dietlibc__
34 /* XXX imake style */
35 #define _BSD_SOURCE /* live, BSD, live❣ */
36 #endif
37
38 #if HAVE_SYS_PARAM_H
39 #include <sys/param.h>
40 #endif
41 #include <sys/types.h>
42 #if HAVE_BOTH_TIME_H
43 #include <sys/time.h>
44 #include <time.h>
45 #elif HAVE_SYS_TIME_H
46 #include <sys/time.h>
47 #elif HAVE_TIME_H
48 #include <time.h>
49 #endif
50 #include <sys/ioctl.h>
51 #if HAVE_SYS_SYSMACROS_H
52 #include <sys/sysmacros.h>
53 #endif
54 #if HAVE_SYS_MKDEV_H
55 #include <sys/mkdev.h>
56 #endif
57 #if HAVE_SYS_MMAN_H
58 #include <sys/mman.h>
59 #endif
60 #if HAVE_SYS_RESOURCE_H
61 #include <sys/resource.h>
62 #endif
63 #include <sys/stat.h>
64 #include <sys/wait.h>
65 #include <dirent.h>
66 #include <errno.h>
67 #include <fcntl.h>
68 #if HAVE_IO_H
69 #include <io.h>
70 #endif
71 #if HAVE_LIBGEN_H
72 #include <libgen.h>
73 #endif
74 #if HAVE_LIBUTIL_H
75 #include <libutil.h>
76 #endif
77 #include <limits.h>
78 #if HAVE_PATHS_H
79 #include <paths.h>
80 #endif
81 #include <pwd.h>
82 #include <setjmp.h>
83 #include <signal.h>
84 #include <stdarg.h>
85 #include <stddef.h>
86 #if HAVE_STDINT_H
87 #include <stdint.h>
88 #endif
89 #include <stdio.h>
90 #include <stdlib.h>
91 #include <string.h>
92 #if HAVE_STRINGS_H
93 #include <strings.h>
94 #endif
95 #if HAVE_TERMIOS_H
96 #include <termios.h>
97 #else
98 /* shudder… */
99 #include <termio.h>
100 #endif
101 #ifdef _ISC_UNIX
102 /* XXX imake style */
103 #include <sys/sioctl.h>
104 #endif
105 #if HAVE_ULIMIT_H
106 #include <ulimit.h>
107 #endif
108 #include <unistd.h>
109 #if HAVE_VALUES_H
110 #include <values.h>
111 #endif
112 #ifdef MIRBSD_BOOTFLOPPY
113 #include <wchar.h>
114 #endif
115
116 /* monkey-patch known-bad offsetof versions to quell a warning */
117 #if (defined(__KLIBC__) || defined(__dietlibc__)) && \
118 ((defined(__GNUC__) && (__GNUC__ > 3)) || defined(__NWCC__))
119 #undef offsetof
120 #define offsetof(s,e) __builtin_offsetof(s, e)
121 #endif
122
123 #undef __attribute__
124 #if HAVE_ATTRIBUTE_BOUNDED
125 #define MKSH_A_BOUNDED(x,y,z) __attribute__((__bounded__(x, y, z)))
126 #else
127 #define MKSH_A_BOUNDED(x,y,z) /* nothing */
128 #endif
129 #if HAVE_ATTRIBUTE_FORMAT
130 #define MKSH_A_FORMAT(x,y,z) __attribute__((__format__(x, y, z)))
131 #else
132 #define MKSH_A_FORMAT(x,y,z) /* nothing */
133 #endif
134 #if HAVE_ATTRIBUTE_NORETURN
135 #define MKSH_A_NORETURN __attribute__((__noreturn__))
136 #else
137 #define MKSH_A_NORETURN /* nothing */
138 #endif
139 #if HAVE_ATTRIBUTE_PURE
140 #define MKSH_A_PURE __attribute__((__pure__))
141 #else
142 #define MKSH_A_PURE /* nothing */
143 #endif
144 #if HAVE_ATTRIBUTE_UNUSED
145 #define MKSH_A_UNUSED __attribute__((__unused__))
146 #else
147 #define MKSH_A_UNUSED /* nothing */
148 #endif
149 #if HAVE_ATTRIBUTE_USED
150 #define MKSH_A_USED __attribute__((__used__))
151 #else
152 #define MKSH_A_USED /* nothing */
153 #endif
154
155 #if defined(MirBSD) && (MirBSD >= 0x09A1) && \
156 defined(__ELF__) && defined(__GNUC__) && \
157 !defined(__llvm__) && !defined(__NWCC__)
158 /*
159 * We got usable __IDSTRING __COPYRIGHT __RCSID __SCCSID macros
160 * which work for all cases; no need to redefine them using the
161 * "portable" macros from below when we might have the "better"
162 * gcc+ELF specific macros or other system dependent ones.
163 */
164 #else
165 #undef __IDSTRING
166 #undef __IDSTRING_CONCAT
167 #undef __IDSTRING_EXPAND
168 #undef __COPYRIGHT
169 #undef __RCSID
170 #undef __SCCSID
171 #define __IDSTRING_CONCAT(l,p) __LINTED__ ## l ## _ ## p
172 #define __IDSTRING_EXPAND(l,p) __IDSTRING_CONCAT(l,p)
173 #ifdef MKSH_DONT_EMIT_IDSTRING
174 #define __IDSTRING(prefix,string) /* nothing */
175 #elif defined(__ELF__) && defined(__GNUC__) && \
176 !(defined(__GNUC__) && defined(__mips16) && (__GNUC__ >= 8)) && \
177 !defined(__llvm__) && !defined(__NWCC__) && !defined(NO_ASM)
178 #define __IDSTRING(prefix,string) \
179 __asm__(".section .comment" \
180 "\n .ascii \"@(\"\"#)" #prefix ": \"" \
181 "\n .asciz \"" string "\"" \
182 "\n .previous")
183 #else
184 #define __IDSTRING(prefix,string) \
185 static const char __IDSTRING_EXPAND(__LINE__,prefix) [] \
186 MKSH_A_USED = "@(""#)" #prefix ": " string
187 #endif
188 #define __COPYRIGHT(x) __IDSTRING(copyright,x)
189 #define __RCSID(x) __IDSTRING(rcsid,x)
190 #define __SCCSID(x) __IDSTRING(sccsid,x)
191 #endif
192
193 #ifdef EXTERN
194 __RCSID("$MirOS: src/bin/mksh/sh.h,v 1.898 2020/05/16 22:38:23 tg Exp $");
195 #endif
196 #define MKSH_VERSION "R59 2020/05/16"
197
198 /* arithmetic types: C implementation */
199 #if !HAVE_CAN_INTTYPES
200 #if !HAVE_CAN_UCBINTS
201 typedef signed int int32_t;
202 typedef unsigned int uint32_t;
203 #else
204 typedef u_int32_t uint32_t;
205 #endif
206 #endif
207
208 /* arithmetic types: shell arithmetics */
209 #ifdef MKSH_LEGACY_MODE
210 /*
211 * POSIX demands these to be the C environment's long type
212 */
213 typedef long mksh_ari_t;
214 typedef unsigned long mksh_uari_t;
215 #else
216 /*
217 * These types are exactly 32 bit wide; signed and unsigned
218 * integer wraparound, even across division and modulo, for
219 * any shell code using them, is guaranteed.
220 */
221 typedef int32_t mksh_ari_t;
222 typedef uint32_t mksh_uari_t;
223 #endif
224
225 /* boolean type (no <stdbool.h> deliberately) */
226 typedef unsigned char mksh_bool;
227 #undef bool
228 /* false MUST equal the same 0 as written by static storage initialisation */
229 #undef false
230 #undef true
231 /* access macros for boolean type */
232 #define bool mksh_bool
233 /* values must have identity mapping between mksh_bool and short */
234 #define false 0
235 #define true 1
236 /* make any-type into bool or short */
237 #define tobool(cond) ((cond) ? true : false)
238
239 /* char (octet) type: C implementation */
240 #if !HAVE_CAN_INT8TYPE
241 #if !HAVE_CAN_UCBINT8
242 typedef unsigned char uint8_t;
243 #else
244 typedef u_int8_t uint8_t;
245 #endif
246 #endif
247
248 /* other standard types */
249
250 #if !HAVE_RLIM_T
251 typedef unsigned long rlim_t;
252 #endif
253
254 #if !HAVE_SIG_T
255 #undef sig_t
256 typedef void (*sig_t)(int);
257 #endif
258
259 #ifdef MKSH_TYPEDEF_SIG_ATOMIC_T
260 typedef MKSH_TYPEDEF_SIG_ATOMIC_T sig_atomic_t;
261 #endif
262
263 #ifdef MKSH_TYPEDEF_SSIZE_T
264 typedef MKSH_TYPEDEF_SSIZE_T ssize_t;
265 #endif
266
267 #if defined(MKSH_SMALL) && !defined(MKSH_SMALL_BUT_FAST)
268 #define MKSH_SHF_NO_INLINE
269 #endif
270
271 /* do not merge these conditionals as neatcc’s preprocessor is simple */
272 #ifdef __neatcc__
273 /* parsing of comma operator <,> in expressions broken */
274 #define MKSH_SHF_NO_INLINE
275 #endif
276
277 /* un-do vendor damage */
278
279 #undef BAD /* AIX defines that somewhere */
280 #undef PRINT /* LynxOS defines that somewhere */
281 #undef flock /* SCO UnixWare defines that to flock64 but ENOENT */
282
283
284 #ifndef MKSH_INCLUDES_ONLY
285
286 /* compile-time assertions */
287 #define cta(name,expr) struct cta_ ## name { char t[(expr) ? 1 : -1]; }
288
289 /* EBCDIC fun */
290
291 /* see the large comment in shf.c for an EBCDIC primer */
292
293 #if defined(MKSH_FOR_Z_OS) && defined(__MVS__) && defined(__IBMC__) && defined(__CHARSET_LIB)
294 # if !__CHARSET_LIB && !defined(MKSH_EBCDIC)
295 # error "Please compile with Build.sh -E for EBCDIC!"
296 # endif
297 # if __CHARSET_LIB && defined(MKSH_EBCDIC)
298 # error "Please compile without -E argument to Build.sh for ASCII!"
299 # endif
300 # if __CHARSET_LIB && !defined(_ENHANCED_ASCII_EXT)
301 /* go all-out on ASCII */
302 # define _ENHANCED_ASCII_EXT 0xFFFFFFFF
303 # endif
304 #endif
305
306 /* extra types */
307
308 /* getrusage does not exist on OS/2 kLIBC */
309 #if !HAVE_GETRUSAGE && !defined(__OS2__)
310 #undef rusage
311 #undef RUSAGE_SELF
312 #undef RUSAGE_CHILDREN
313 #define rusage mksh_rusage
314 #define RUSAGE_SELF 0
315 #define RUSAGE_CHILDREN -1
316
317 struct rusage {
318 struct timeval ru_utime;
319 struct timeval ru_stime;
320 };
321 #endif
322
323 /* extra macros */
324
325 #ifndef timerclear
326 #define timerclear(tvp) \
327 do { \
328 (tvp)->tv_sec = (tvp)->tv_usec = 0; \
329 } while (/* CONSTCOND */ 0)
330 #endif
331 #ifndef timeradd
332 #define timeradd(tvp,uvp,vvp) \
333 do { \
334 (vvp)->tv_sec = (tvp)->tv_sec + (uvp)->tv_sec; \
335 (vvp)->tv_usec = (tvp)->tv_usec + (uvp)->tv_usec; \
336 if ((vvp)->tv_usec >= 1000000) { \
337 (vvp)->tv_sec++; \
338 (vvp)->tv_usec -= 1000000; \
339 } \
340 } while (/* CONSTCOND */ 0)
341 #endif
342 #ifndef timersub
343 #define timersub(tvp,uvp,vvp) \
344 do { \
345 (vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec; \
346 (vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec; \
347 if ((vvp)->tv_usec < 0) { \
348 (vvp)->tv_sec--; \
349 (vvp)->tv_usec += 1000000; \
350 } \
351 } while (/* CONSTCOND */ 0)
352 #endif
353
354 #ifdef MKSH__NO_PATH_MAX
355 #undef PATH_MAX
356 #else
357 #ifndef PATH_MAX
358 #ifdef MAXPATHLEN
359 #define PATH_MAX MAXPATHLEN
360 #else
361 #define PATH_MAX 1024
362 #endif
363 #endif
364 #endif
365 #ifndef SIZE_MAX
366 #ifdef SIZE_T_MAX
367 #define SIZE_MAX SIZE_T_MAX
368 #else
369 #define SIZE_MAX ((size_t)-1)
370 #endif
371 #endif
372 #ifndef S_ISLNK
373 #define S_ISLNK(m) ((m & 0170000) == 0120000)
374 #endif
375 #ifndef S_ISSOCK
376 #define S_ISSOCK(m) ((m & 0170000) == 0140000)
377 #endif
378 #if !defined(S_ISCDF) && defined(S_CDF)
379 #define S_ISCDF(m) (S_ISDIR(m) && ((m) & S_CDF))
380 #endif
381 #ifndef DEFFILEMODE
382 #define DEFFILEMODE (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
383 #endif
384
385
386 /* determine ksh_NSIG: first, use the traditional definitions */
387 #undef ksh_NSIG
388 #if defined(NSIG)
389 #define ksh_NSIG (NSIG)
390 #elif defined(_NSIG)
391 #define ksh_NSIG (_NSIG)
392 #elif defined(SIGMAX)
393 #define ksh_NSIG (SIGMAX + 1)
394 #elif defined(_SIGMAX)
395 #define ksh_NSIG (_SIGMAX + 1)
396 #elif defined(NSIG_MAX)
397 #define ksh_NSIG (NSIG_MAX)
398 #elif defined(MKSH_FOR_Z_OS)
399 #define ksh_NSIG 40
400 #else
401 # error Please have your platform define NSIG.
402 #endif
403 /* range-check them */
404 #if (ksh_NSIG < 1)
405 # error Your NSIG value is not positive.
406 #undef ksh_NSIG
407 #endif
408 /* second, see if the new POSIX definition is available */
409 #ifdef NSIG_MAX
410 #if (NSIG_MAX < 2)
411 /* and usable */
412 # error Your NSIG_MAX value is too small.
413 #undef NSIG_MAX
414 #elif (ksh_NSIG > NSIG_MAX)
415 /* and realistic */
416 # error Your NSIG value is larger than your NSIG_MAX value.
417 #undef NSIG_MAX
418 #else
419 /* since it’s usable, prefer it */
420 #undef ksh_NSIG
421 #define ksh_NSIG (NSIG_MAX)
422 #endif
423 /* if NSIG_MAX is now still defined, use sysconf(_SC_NSIG) at runtime */
424 #endif
425 /* third, for cpp without the error directive, default */
426 #ifndef ksh_NSIG
427 #define ksh_NSIG 64
428 #endif
429
430 #define ksh_sigmask(sig) (((sig) < 1 || (sig) > 127) ? 255 : 128 + (sig))
431
432
433 /* OS-dependent additions (functions, variables, by OS) */
434
435 #ifdef MKSH_EXE_EXT
436 #undef MKSH_EXE_EXT
437 #define MKSH_EXE_EXT ".exe"
438 #else
439 #define MKSH_EXE_EXT ""
440 #endif
441
442 #ifdef __OS2__
443 #define MKSH_UNIXROOT "/@unixroot"
444 #else
445 #define MKSH_UNIXROOT ""
446 #endif
447
448 #ifdef MKSH_DOSPATH
449 #ifndef __GNUC__
450 # error GCC extensions needed later on
451 #endif
452 #define MKSH_PATHSEPS ";"
453 #define MKSH_PATHSEPC ';'
454 #else
455 #define MKSH_PATHSEPS ":"
456 #define MKSH_PATHSEPC ':'
457 #endif
458
459 #if !HAVE_FLOCK_DECL
460 extern int flock(int, int);
461 #endif
462
463 #if !HAVE_GETTIMEOFDAY
464 #define mksh_TIME(tv) do { \
465 (tv).tv_usec = 0; \
466 (tv).tv_sec = time(NULL); \
467 } while (/* CONSTCOND */ 0)
468 #else
469 #define mksh_TIME(tv) gettimeofday(&(tv), NULL)
470 #endif
471
472 #if !HAVE_GETRUSAGE
473 extern int getrusage(int, struct rusage *);
474 #endif
475
476 #if !HAVE_MEMMOVE
477 /* we assume either memmove or bcopy exist, at the moment */
478 #define memmove(dst,src,len) bcopy((src), (dst), (len))
479 #endif
480
481 #if !HAVE_REVOKE_DECL
482 extern int revoke(const char *);
483 #endif
484
485 #if defined(DEBUG) || !HAVE_STRERROR
486 #undef strerror
487 #define strerror /* poisoned */ dontuse_strerror
488 #define cstrerror /* replaced */ cstrerror
489 extern const char *cstrerror(int);
490 #else
491 #define cstrerror(errnum) ((const char *)strerror(errnum))
492 #endif
493
494 #if !HAVE_STRLCPY
495 size_t strlcpy(char *, const char *, size_t);
496 #endif
497
498 #ifdef __INTERIX
499 /* XXX imake style */
500 #define makedev mkdev
501 extern int __cdecl seteuid(uid_t);
502 extern int __cdecl setegid(gid_t);
503 #endif
504
505 #if defined(__COHERENT__)
506 #ifndef O_ACCMODE
507 /* this need not work everywhere, take care */
508 #define O_ACCMODE (O_RDONLY | O_WRONLY | O_RDWR)
509 #endif
510 #endif
511
512 #ifndef O_BINARY
513 #define O_BINARY 0
514 #endif
515
516 #undef O_MAYEXEC /* https://lwn.net/Articles/820658/ */
517 #define O_MAYEXEC 0
518
519 #ifdef MKSH__NO_SYMLINK
520 #undef S_ISLNK
521 #define S_ISLNK(m) (/* CONSTCOND */ 0)
522 #define mksh_lstat stat
523 #else
524 #define mksh_lstat lstat
525 #endif
526
527 #if HAVE_TERMIOS_H
528 #define mksh_ttyst struct termios
529 #define mksh_tcget(fd,st) tcgetattr((fd), (st))
530 #define mksh_tcset(fd,st) tcsetattr((fd), TCSADRAIN, (st))
531 #else
532 #define mksh_ttyst struct termio
533 #define mksh_tcget(fd,st) ioctl((fd), TCGETA, (st))
534 #define mksh_tcset(fd,st) ioctl((fd), TCSETAW, (st))
535 #endif
536
537 #ifndef ISTRIP
538 #define ISTRIP 0
539 #endif
540
541 #ifdef MKSH_EBCDIC
542 #define KSH_BEL '\a'
543 #define KSH_ESC 047
544 #define KSH_ESC_STRING "\047"
545 #define KSH_VTAB '\v'
546 #else
547 /*
548 * According to the comments in pdksh, \007 seems to be more portable
549 * than \a (HP-UX cc, Ultrix cc, old pcc, etc.) so we avoid the escape
550 * sequence if ASCII can be assumed.
551 */
552 #define KSH_BEL 7
553 #define KSH_ESC 033
554 #define KSH_ESC_STRING "\033"
555 #define KSH_VTAB 11
556 #endif
557
558
559 /* some useful #defines */
560 #ifdef EXTERN
561 # define E_INIT(i) = i
562 #else
563 # define E_INIT(i)
564 # define EXTERN extern
565 # define EXTERN_DEFINED
566 #endif
567
568 /* define bit in flag */
569 #define BIT(i) (1U << (i))
570 #define NELEM(a) (sizeof(a) / sizeof((a)[0]))
571
572 /*
573 * Make MAGIC a char that might be printed to make bugs more obvious, but
574 * not a char that is used often. Also, can't use the high bit as it causes
575 * portability problems (calling strchr(x, 0x80 | 'x') is error prone).
576 *
577 * MAGIC can be followed by MAGIC (to escape the octet itself) or one of:
578 * ' !)*,-?[]{|}' 0x80|' !*+?@' (probably… hysteric raisins abound)
579 *
580 * The |0x80 is likely unsafe on EBCDIC :( though the listed chars are
581 * low-bit7 at least on cp1047 so YMMV
582 */
583 #define MAGIC KSH_BEL /* prefix for *?[!{,} during expand */
584 #define ISMAGIC(c) (ord(c) == ORD(MAGIC))
585
586 EXTERN const char *safe_prompt; /* safe prompt if PS1 substitution fails */
587
588 #ifdef MKSH_LEGACY_MODE
589 #define KSH_VERSIONNAME_ISLEGACY "LEGACY"
590 #else
591 #define KSH_VERSIONNAME_ISLEGACY "MIRBSD"
592 #endif
593 #ifdef MKSH_WITH_TEXTMODE
594 #define KSH_VERSIONNAME_TEXTMODE " +TEXTMODE"
595 #else
596 #define KSH_VERSIONNAME_TEXTMODE ""
597 #endif
598 #ifdef MKSH_EBCDIC
599 #define KSH_VERSIONNAME_EBCDIC " +EBCDIC"
600 #else
601 #define KSH_VERSIONNAME_EBCDIC ""
602 #endif
603 #ifndef KSH_VERSIONNAME_VENDOR_EXT
604 #define KSH_VERSIONNAME_VENDOR_EXT ""
605 #endif
606 EXTERN const char initvsn[] E_INIT("KSH_VERSION=@(#)" KSH_VERSIONNAME_ISLEGACY \
607 " KSH " MKSH_VERSION KSH_VERSIONNAME_EBCDIC KSH_VERSIONNAME_TEXTMODE \
608 KSH_VERSIONNAME_VENDOR_EXT);
609 #define KSH_VERSION (initvsn + /* "KSH_VERSION=@(#)" */ 16)
610
611 EXTERN const char digits_uc[] E_INIT("0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ");
612 EXTERN const char digits_lc[] E_INIT("0123456789abcdefghijklmnopqrstuvwxyz");
613
614 /*
615 * Evil hack for const correctness due to API brokenness
616 */
617 union mksh_cchack {
618 char *rw;
619 const char *ro;
620 };
621 union mksh_ccphack {
622 char **rw;
623 const char **ro;
624 };
625
626 /*
627 * Evil hack since casting uint to sint is implementation-defined
628 */
629 typedef union {
630 mksh_ari_t i;
631 mksh_uari_t u;
632 } mksh_ari_u;
633
634 /* for const debugging */
635 #if defined(DEBUG) && defined(__GNUC__) && !defined(__ICC) && \
636 !defined(__INTEL_COMPILER) && !defined(__SUNPRO_C)
637 char *ucstrchr(char *, int);
638 char *ucstrstr(char *, const char *);
639 #undef strchr
640 #define strchr ucstrchr
641 #define strstr ucstrstr
642 #define cstrchr(s,c) ({ \
643 union mksh_cchack in, out; \
644 \
645 in.ro = (s); \
646 out.rw = ucstrchr(in.rw, (c)); \
647 (out.ro); \
648 })
649 #define cstrstr(b,l) ({ \
650 union mksh_cchack in, out; \
651 \
652 in.ro = (b); \
653 out.rw = ucstrstr(in.rw, (l)); \
654 (out.ro); \
655 })
656 #define vstrchr(s,c) (cstrchr((s), (c)) != NULL)
657 #define vstrstr(b,l) (cstrstr((b), (l)) != NULL)
658 #else /* !DEBUG, !gcc */
659 #define cstrchr(s,c) ((const char *)strchr((s), (c)))
660 #define cstrstr(s,c) ((const char *)strstr((s), (c)))
661 #define vstrchr(s,c) (strchr((s), (c)) != NULL)
662 #define vstrstr(b,l) (strstr((b), (l)) != NULL)
663 #endif
664
665 #if defined(DEBUG) || defined(__COVERITY__)
666 #ifndef DEBUG_LEAKS
667 #define DEBUG_LEAKS
668 #endif
669 #endif
670
671 #if (!defined(MKSH_BUILDMAKEFILE4BSD) && !defined(MKSH_BUILDSH)) || (MKSH_BUILD_R != 592)
672 #error Must run Build.sh to compile this.
673 extern void thiswillneverbedefinedIhope(void);
674 int
im_sorry_dave(void)675 im_sorry_dave(void)
676 {
677 /* I’m sorry, Dave. I’m afraid I can’t do that. */
678 return (thiswillneverbedefinedIhope());
679 }
680 #endif
681
682 /* use this ipv strchr(s, 0) but no side effects in s! */
683 #define strnul(s) ((s) + strlen((const void *)s))
684
685 #define utf_ptradjx(src,dst) do { \
686 (dst) = (src) + utf_ptradj(src); \
687 } while (/* CONSTCOND */ 0)
688
689 #if defined(MKSH_SMALL) && !defined(MKSH_SMALL_BUT_FAST)
690 #define strdupx(d,s,ap) do { \
691 (d) = strdup_i((s), (ap)); \
692 } while (/* CONSTCOND */ 0)
693 #define strndupx(d,s,n,ap) do { \
694 (d) = strndup_i((s), (n), (ap)); \
695 } while (/* CONSTCOND */ 0)
696 #else
697 /* be careful to evaluate arguments only once! */
698 #define strdupx(d,s,ap) do { \
699 const char *strdup_src = (const void *)(s); \
700 char *strdup_dst = NULL; \
701 \
702 if (strdup_src != NULL) { \
703 size_t strdup_len = strlen(strdup_src) + 1; \
704 strdup_dst = alloc(strdup_len, (ap)); \
705 memcpy(strdup_dst, strdup_src, strdup_len); \
706 } \
707 (d) = strdup_dst; \
708 } while (/* CONSTCOND */ 0)
709 #define strndupx(d,s,n,ap) do { \
710 const char *strdup_src = (const void *)(s); \
711 char *strdup_dst = NULL; \
712 \
713 if (strdup_src != NULL) { \
714 size_t strndup_len = (n); \
715 strdup_dst = alloc(strndup_len + 1, (ap)); \
716 memcpy(strdup_dst, strdup_src, strndup_len); \
717 strdup_dst[strndup_len] = '\0'; \
718 } \
719 (d) = strdup_dst; \
720 } while (/* CONSTCOND */ 0)
721 #endif
722 #define strdup2x(d,s1,s2) do { \
723 const char *strdup_src = (const void *)(s1); \
724 const char *strdup_app = (const void *)(s2); \
725 size_t strndup_len = strlen(strdup_src); \
726 size_t strndup_ln2 = strlen(strdup_app) + 1; \
727 char *strdup_dst = alloc(strndup_len + strndup_ln2, ATEMP); \
728 \
729 memcpy(strdup_dst, strdup_src, strndup_len); \
730 memcpy(strdup_dst + strndup_len, strdup_app, strndup_ln2); \
731 (d) = strdup_dst; \
732 } while (/* CONSTCOND */ 0)
733 #define strpathx(d,s1,s2,cond) do { \
734 const char *strdup_src = (const void *)(s1); \
735 const char *strdup_app = (const void *)(s2); \
736 size_t strndup_len = strlen(strdup_src) + 1; \
737 size_t strndup_ln2 = ((cond) || *strdup_app) ? \
738 strlen(strdup_app) + 1 : 0; \
739 char *strdup_dst = alloc(strndup_len + strndup_ln2, ATEMP); \
740 \
741 memcpy(strdup_dst, strdup_src, strndup_len); \
742 if (strndup_ln2) { \
743 strdup_dst[strndup_len - 1] = '/'; \
744 memcpy(strdup_dst + strndup_len, strdup_app, \
745 strndup_ln2); \
746 } \
747 (d) = strdup_dst; \
748 } while (/* CONSTCOND */ 0)
749
750 #ifdef MKSH_SMALL
751 #ifndef MKSH_NOPWNAM
752 #define MKSH_NOPWNAM /* defined */
753 #endif
754 #ifndef MKSH_S_NOVI
755 #define MKSH_S_NOVI 1
756 #endif
757 #endif
758
759 #ifndef MKSH_S_NOVI
760 #define MKSH_S_NOVI 0
761 #endif
762
763 #if defined(MKSH_NOPROSPECTOFWORK) && !defined(MKSH_UNEMPLOYED)
764 #define MKSH_UNEMPLOYED 1
765 #endif
766
767 #define NUFILE 32 /* Number of user-accessible files */
768 #define FDBASE 10 /* First file usable by Shell */
769
770 /*
771 * simple grouping allocator
772 */
773
774
775 /* 0. OS API: where to get memory from and how to free it (grouped) */
776
777 /* malloc(3)/realloc(3) -> free(3) for use by the memory allocator */
778 #define malloc_osi(sz) malloc(sz)
779 #define realloc_osi(p,sz) realloc((p), (sz))
780 #define free_osimalloc(p) free(p)
781
782 /* malloc(3)/realloc(3) -> free(3) for use by mksh code */
783 #define malloc_osfunc(sz) malloc(sz)
784 #define realloc_osfunc(p,sz) realloc((p), (sz))
785 #define free_osfunc(p) free(p)
786
787 #if HAVE_MKNOD
788 /* setmode(3) -> free(3) */
789 #define free_ossetmode(p) free(p)
790 #endif
791
792 #ifdef MKSH__NO_PATH_MAX
793 /* GNU libc: get_current_dir_name(3) -> free(3) */
794 #define free_gnu_gcdn(p) free(p)
795 #endif
796
797
798 /* 1. internal structure */
799 struct lalloc_common {
800 struct lalloc_common *next;
801 };
802
803 #ifdef MKSH_ALLOC_CATCH_UNDERRUNS
804 struct lalloc_item {
805 struct lalloc_common *next;
806 size_t len;
807 char dummy[8192 - sizeof(struct lalloc_common *) - sizeof(size_t)];
808 };
809 #endif
810
811 /* 2. sizes */
812 #ifdef MKSH_ALLOC_CATCH_UNDERRUNS
813 #define ALLOC_ITEM struct lalloc_item
814 #define ALLOC_OVERHEAD 0
815 #else
816 #define ALLOC_ITEM struct lalloc_common
817 #define ALLOC_OVERHEAD (sizeof(ALLOC_ITEM))
818 #endif
819
820 /* 3. group structure */
821 typedef struct lalloc_common Area;
822
823
824 EXTERN Area aperm; /* permanent object space */
825 #define APERM &aperm
826 #define ATEMP &e->area
827
828 /*
829 * flags (the order of these enums MUST match the order in misc.c(options[]))
830 */
831 enum sh_flag {
832 #define SHFLAGS_ENUMS
833 #include "sh_flags.gen"
834 FNFLAGS /* (place holder: how many flags are there) */
835 };
836
837 #define Flag(f) (shell_flags[(int)(f)])
838 #define UTFMODE Flag(FUNNYCODE)
839
840 /*
841 * parsing & execution environment
842 *
843 * note that kshlongjmp MUST NOT be passed 0 as second argument!
844 */
845 #ifdef MKSH_NO_SIGSETJMP
846 #define kshjmp_buf jmp_buf
847 #define kshsetjmp(jbuf) _setjmp(jbuf)
848 #define kshlongjmp _longjmp
849 #else
850 #define kshjmp_buf sigjmp_buf
851 #define kshsetjmp(jbuf) sigsetjmp((jbuf), 0)
852 #define kshlongjmp siglongjmp
853 #endif
854
855 struct sretrace_info;
856 struct yyrecursive_state;
857
858 EXTERN struct sretrace_info *retrace_info;
859 EXTERN unsigned int subshell_nesting_type;
860
861 extern struct env {
862 ALLOC_ITEM alloc_INT; /* internal, do not touch */
863 Area area; /* temporary allocation area */
864 struct env *oenv; /* link to previous environment */
865 struct block *loc; /* local variables and functions */
866 short *savefd; /* original redirected fds */
867 struct temp *temps; /* temp files */
868 /* saved parser recursion state */
869 struct yyrecursive_state *yyrecursive_statep;
870 kshjmp_buf jbuf; /* long jump back to env creator */
871 uint8_t type; /* environment type - see below */
872 uint8_t flags; /* EF_* */
873 } *e;
874
875 /* struct env.type values */
876 #define E_NONE 0 /* dummy environment */
877 #define E_PARSE 1 /* parsing command # */
878 #define E_FUNC 2 /* executing function # */
879 #define E_INCL 3 /* including a file via . # */
880 #define E_EXEC 4 /* executing command tree */
881 #define E_LOOP 5 /* executing for/while # */
882 #define E_ERRH 6 /* general error handler # */
883 #define E_GONE 7 /* hidden in child */
884 #define E_EVAL 8 /* running eval # */
885 /* # indicates env has valid jbuf (see unwind()) */
886
887 /* struct env.flag values */
888 #define EF_BRKCONT_PASS BIT(1) /* set if E_LOOP must pass break/continue on */
889 #define EF_FAKE_SIGDIE BIT(2) /* hack to get info from unwind to quitenv */
890 #define EF_IN_EVAL BIT(3) /* inside an eval */
891
892 /* Do breaks/continues stop at env type e? */
893 #define STOP_BRKCONT(t) ((t) == E_NONE || (t) == E_PARSE || \
894 (t) == E_FUNC || (t) == E_INCL)
895 /* Do returns stop at env type e? */
896 #define STOP_RETURN(t) ((t) == E_FUNC || (t) == E_INCL)
897
898 /* values for kshlongjmp(e->jbuf, i) */
899 /* note that i MUST NOT be zero */
900 #define LRETURN 1 /* return statement */
901 #define LEXIT 2 /* exit statement */
902 #define LERROR 3 /* errorf() called */
903 #define LERREXT 4 /* set -e caused */
904 #define LINTR 5 /* ^C noticed */
905 #define LBREAK 6 /* break statement */
906 #define LCONTIN 7 /* continue statement */
907 #define LSHELL 8 /* return to interactive shell() */
908 #define LAEXPR 9 /* error in arithmetic expression */
909 #define LLEAVE 10 /* untrappable exit/error */
910
911 /* sort of shell global state */
912 EXTERN pid_t procpid; /* PID of executing process */
913 EXTERN int exstat; /* exit status */
914 EXTERN int subst_exstat; /* exit status of last $(..)/`..` */
915 EXTERN struct tbl *vp_pipest; /* global PIPESTATUS array */
916 EXTERN short trap_exstat; /* exit status before running a trap */
917 EXTERN uint8_t trap_nested; /* running nested traps */
918 EXTERN uint8_t shell_flags[FNFLAGS];
919 EXTERN uint8_t baseline_flags[FNFLAGS
920 #if !defined(MKSH_SMALL) || defined(DEBUG)
921 + 1
922 #endif
923 ];
924 EXTERN bool as_builtin; /* direct builtin call */
925 EXTERN const char *kshname; /* $0 */
926 EXTERN struct {
927 uid_t kshuid_v; /* real UID of shell at startup */
928 uid_t ksheuid_v; /* effective UID of shell */
929 gid_t kshgid_v; /* real GID of shell at startup */
930 gid_t kshegid_v; /* effective GID of shell */
931 pid_t kshpgrp_v; /* process group of shell */
932 pid_t kshppid_v; /* PID of parent of shell */
933 pid_t kshpid_v; /* $$, shell PID */
934 } rndsetupstate;
935
936 #define kshpid rndsetupstate.kshpid_v
937 #define kshpgrp rndsetupstate.kshpgrp_v
938 #define kshuid rndsetupstate.kshuid_v
939 #define ksheuid rndsetupstate.ksheuid_v
940 #define kshgid rndsetupstate.kshgid_v
941 #define kshegid rndsetupstate.kshegid_v
942 #define kshppid rndsetupstate.kshppid_v
943
944
945 /* option processing */
946 #define OF_CMDLINE 0x01 /* command line */
947 #define OF_SET 0x02 /* set builtin */
948 #define OF_SPECIAL 0x04 /* a special variable changing */
949 #define OF_INTERNAL 0x08 /* set internally by shell */
950 #define OF_FIRSTTIME 0x10 /* as early as possible, once */
951 #define OF_ANY (OF_CMDLINE | OF_SET | OF_SPECIAL | OF_INTERNAL)
952
953 /* null value for variable; comparison pointer for unset */
954 EXTERN char null[] E_INIT("");
955
956 /* string pooling: do we rely on the compiler? */
957 #ifndef HAVE_STRING_POOLING
958 /* no, we use our own, saves quite some space */
959 #elif HAVE_STRING_POOLING == 2
960 /* “on demand” */
961 #ifdef __GNUC__
962 /* only for GCC 4 or later, older ones can get by without */
963 #if __GNUC__ < 4
964 #undef HAVE_STRING_POOLING
965 #endif
966 #else
967 /* not GCC, default to on */
968 #endif
969 #elif HAVE_STRING_POOLING == 0
970 /* default to on, unless explicitly set to 0 */
971 #undef HAVE_STRING_POOLING
972 #endif
973
974 #ifndef HAVE_STRING_POOLING /* helpers for pooled strings */
975 EXTERN const char T4spaces[] E_INIT(" ");
976 #define T1space (Treal_sp2 + 5)
977 #define Tcolsp (Tf_sD_ + 2)
978 #define TC_IFSWS (TinitIFS + 4)
979 EXTERN const char TinitIFS[] E_INIT("IFS= \t\n");
980 EXTERN const char TFCEDIT_dollaru[] E_INIT("${FCEDIT:-/bin/ed} $_");
981 #define Tspdollaru (TFCEDIT_dollaru + 18)
982 EXTERN const char Tsgdot[] E_INIT("*=.");
983 EXTERN const char Taugo[] E_INIT("augo");
984 EXTERN const char Tbracket[] E_INIT("[");
985 #define Tdot (Tsgdot + 2)
986 #define Talias (Tunalias + 2)
987 EXTERN const char Tbadnum[] E_INIT("bad number");
988 #define Tbadsubst (Tfg_badsubst + 10)
989 EXTERN const char Tbg[] E_INIT("bg");
990 EXTERN const char Tbad_bsize[] E_INIT("bad shf/buf/bsize");
991 #define Tbsize (Tbad_bsize + 12)
992 EXTERN const char Tbad_sig_ss[] E_INIT("%s: bad signal '%s'");
993 #define Tbad_sig_s (Tbad_sig_ss + 4)
994 EXTERN const char Tsgbreak[] E_INIT("*=break");
995 #define Tbreak (Tsgbreak + 2)
996 EXTERN const char T__builtin[] E_INIT("-\\builtin");
997 #define T_builtin (T__builtin + 1)
998 #define Tbuiltin (T__builtin + 2)
999 EXTERN const char Toomem[] E_INIT("can't allocate %zu data bytes");
1000 EXTERN const char Tcant_cd[] E_INIT("restricted shell - can't cd");
1001 EXTERN const char Tcant_find[] E_INIT("can't find");
1002 EXTERN const char Tcant_open[] E_INIT("can't open");
1003 #define Tbytes (Toomem + 24)
1004 EXTERN const char Tbcat[] E_INIT("!cat");
1005 #define Tcat (Tbcat + 1)
1006 #define Tcd (Tcant_cd + 25)
1007 #define T_command (T_funny_command + 9)
1008 #define Tcommand (T_funny_command + 10)
1009 EXTERN const char Tsgcontinue[] E_INIT("*=continue");
1010 #define Tcontinue (Tsgcontinue + 2)
1011 EXTERN const char Tcreate[] E_INIT("create");
1012 EXTERN const char TELIF_unexpected[] E_INIT("TELIF unexpected");
1013 EXTERN const char TEXECSHELL[] E_INIT("EXECSHELL");
1014 EXTERN const char TENV[] E_INIT("ENV");
1015 EXTERN const char Tdsgexport[] E_INIT("^*=export");
1016 #define Texport (Tdsgexport + 3)
1017 #ifdef __OS2__
1018 EXTERN const char Textproc[] E_INIT("extproc");
1019 #endif
1020 EXTERN const char Tfalse[] E_INIT("false");
1021 EXTERN const char Tfg[] E_INIT("fg");
1022 EXTERN const char Tfg_badsubst[] E_INIT("fileglob: bad substitution");
1023 #define Tfile (Tfile_fd + 20)
1024 EXTERN const char Tfile_fd[] E_INIT("function definition file");
1025 EXTERN const char TFPATH[] E_INIT("FPATH");
1026 EXTERN const char T_function[] E_INIT(" function");
1027 #define Tfunction (T_function + 1)
1028 EXTERN const char T_funny_command[] E_INIT("funny $()-command");
1029 EXTERN const char Tgetopts[] E_INIT("getopts");
1030 #define Thistory (Tnot_in_history + 7)
1031 EXTERN const char Tintovfl[] E_INIT("integer overflow %zu %c %zu prevented");
1032 EXTERN const char Tinvname[] E_INIT("%s: invalid %s name");
1033 EXTERN const char Tjobs[] E_INIT("jobs");
1034 EXTERN const char Tjob_not_started[] E_INIT("job not started");
1035 EXTERN const char Tmksh[] E_INIT("mksh");
1036 #define Tname (Tinvname + 15)
1037 EXTERN const char Tno_args[] E_INIT("missing argument");
1038 EXTERN const char Tno_OLDPWD[] E_INIT("no OLDPWD");
1039 EXTERN const char Tnot_ident[] E_INIT("is not an identifier");
1040 EXTERN const char Tnot_in_history[] E_INIT("not in history");
1041 EXTERN const char Tnot_found_s[] E_INIT("%s not found");
1042 #define Tnot_found (Tnot_found_s + 3)
1043 #define Tnot_started (Tjob_not_started + 4)
1044 #define TOLDPWD (Tno_OLDPWD + 3)
1045 #define Topen (Tcant_open + 6)
1046 EXTERN const char To_o_reset[] E_INIT(" -o .reset");
1047 #define To_reset (To_o_reset + 4)
1048 #define TPATH (TFPATH + 1)
1049 #define Tpo (Tset_po + 4)
1050 #define Tpv (TpVv + 1)
1051 EXTERN const char TpVv[] E_INIT("Vpv");
1052 #define TPWD (Tno_OLDPWD + 6)
1053 #define Tread (Tshf_read + 4)
1054 EXTERN const char Tdsgreadonly[] E_INIT("^*=readonly");
1055 #define Treadonly (Tdsgreadonly + 3)
1056 EXTERN const char Tredirection_dup[] E_INIT("can't finish (dup) redirection");
1057 #define Tredirection (Tredirection_dup + 19)
1058 #define Treal_sp1 (Treal_sp2 + 1)
1059 EXTERN const char Treal_sp2[] E_INIT(" real ");
1060 EXTERN const char TREPLY[] E_INIT("REPLY");
1061 EXTERN const char Treq_arg[] E_INIT("requires an argument");
1062 EXTERN const char Tselect[] E_INIT("select");
1063 #define Tset (Tf_parm + 18)
1064 EXTERN const char Tset_po[] E_INIT("set +o");
1065 EXTERN const char Tsghset[] E_INIT("*=#set");
1066 #define Tsh (Tmksh + 2)
1067 #define TSHELL (TEXECSHELL + 4)
1068 #define Tshell (Ttoo_many_files + 23)
1069 EXTERN const char Tshf_read[] E_INIT("shf_read");
1070 EXTERN const char Tshf_write[] E_INIT("shf_write");
1071 EXTERN const char Tgsource[] E_INIT("=source");
1072 #define Tsource (Tgsource + 1)
1073 EXTERN const char Tj_suspend[] E_INIT("j_suspend");
1074 #define Tsuspend (Tj_suspend + 2)
1075 EXTERN const char Tsynerr[] E_INIT("syntax error");
1076 EXTERN const char Ttime[] E_INIT("time");
1077 EXTERN const char Ttoo_many_args[] E_INIT("too many arguments");
1078 EXTERN const char Ttoo_many_files[] E_INIT("too many open files in shell");
1079 EXTERN const char Ttrue[] E_INIT("true");
1080 EXTERN const char Ttty_fd_dupof[] E_INIT("dup of tty fd");
1081 #define Ttty_fd (Ttty_fd_dupof + 7)
1082 EXTERN const char Tdgtypeset[] E_INIT("^=typeset");
1083 #define Ttypeset (Tdgtypeset + 2)
1084 #define Tugo (Taugo + 1)
1085 EXTERN const char Tunalias[] E_INIT("unalias");
1086 #define Tunexpected (TELIF_unexpected + 6)
1087 EXTERN const char Tunexpected_type[] E_INIT("%s: unexpected %s type %d");
1088 EXTERN const char Tunknown_option[] E_INIT("unknown option");
1089 EXTERN const char Tunwind[] E_INIT("unwind");
1090 #define Tuser_sp1 (Tuser_sp2 + 1)
1091 EXTERN const char Tuser_sp2[] E_INIT(" user ");
1092 #define Twrite (Tshf_write + 4)
1093 EXTERN const char Tf__S[] E_INIT(" %S");
1094 #define Tf__d (Tunexpected_type + 22)
1095 #define Tf_ss (Tf__ss + 1)
1096 EXTERN const char Tf__ss[] E_INIT(" %s%s");
1097 #define Tf__sN (Tf_s_s_sN + 5)
1098 #define Tf_T (Tf_s_T + 3)
1099 EXTERN const char Tf_dN[] E_INIT("%d\n");
1100 EXTERN const char Tf_s_[] E_INIT("%s ");
1101 EXTERN const char Tf_s_T[] E_INIT("%s %T");
1102 EXTERN const char Tf_s_s_sN[] E_INIT("%s %s %s\n");
1103 #define Tf_s_s (Tf_sD_s_s + 4)
1104 #define Tf__s_s (Tf_sD_s_s + 3)
1105 #define Tf_s_sD_s (Tf_cant_ss_s + 6)
1106 EXTERN const char Tf_optfoo[] E_INIT("%s%s-%c: %s");
1107 EXTERN const char Tf_sD_[] E_INIT("%s: ");
1108 EXTERN const char Tf_szs[] E_INIT("%s: %zd %s");
1109 EXTERN const char Tf_parm[] E_INIT("%s: parameter not set");
1110 EXTERN const char Tf_coproc[] E_INIT("-p: %s");
1111 EXTERN const char Tf_cant_s[] E_INIT("%s: can't %s");
1112 EXTERN const char Tf_cant_ss_s[] E_INIT("can't %s %s: %s");
1113 EXTERN const char Tf_heredoc[] E_INIT("here document '%s' unclosed");
1114 #if HAVE_MKNOD
1115 EXTERN const char Tf_nonnum[] E_INIT("non-numeric %s %s '%s'");
1116 #endif
1117 EXTERN const char Tf_S_[] E_INIT("%S ");
1118 #define Tf_S (Tf__S + 1)
1119 #define Tf_lu (Tf_toolarge + 17)
1120 EXTERN const char Tf_toolarge[] E_INIT("%s %s too large: %lu");
1121 EXTERN const char Tf_ldfailed[] E_INIT("%s %s(%d, %ld) failed: %s");
1122 EXTERN const char Tf_sD_s_sD_s[] E_INIT("%s: %s %s: %s");
1123 EXTERN const char Tf_toomany[] E_INIT("too many %ss");
1124 EXTERN const char Tf_sd[] E_INIT("%s %d");
1125 #define Tf_s (Tf_temp + 28)
1126 EXTERN const char Tft_end[] E_INIT("%;");
1127 EXTERN const char Tft_R[] E_INIT("%R");
1128 #define Tf_d (Tunexpected_type + 23)
1129 EXTERN const char Tf_sD_s_qs[] E_INIT("%s: %s '%s'");
1130 EXTERN const char Tf_ro[] E_INIT("read-only: %s");
1131 EXTERN const char Tf_flags[] E_INIT("%s: flags 0x%X");
1132 EXTERN const char Tf_temp[] E_INIT("can't %s temporary file %s: %s");
1133 EXTERN const char Tf_ssfaileds[] E_INIT("%s: %s failed: %s");
1134 EXTERN const char Tf_sD_sD_s[] E_INIT("%s: %s: %s");
1135 EXTERN const char Tf__c_[] E_INIT("-%c ");
1136 EXTERN const char Tf_sD_s_s[] E_INIT("%s: %s %s");
1137 #define Tf_sN (Tf_s_s_sN + 6)
1138 #define Tf_sD_s (Tf_temp + 24)
1139 EXTERN const char T_devtty[] E_INIT("/dev/tty");
1140 #else /* helpers for string pooling */
1141 #define T4spaces " "
1142 #define T1space " "
1143 #define Tcolsp ": "
1144 #define TC_IFSWS " \t\n"
1145 #define TinitIFS "IFS= \t\n"
1146 #define TFCEDIT_dollaru "${FCEDIT:-/bin/ed} $_"
1147 #define Tspdollaru " $_"
1148 #define Tsgdot "*=."
1149 #define Taugo "augo"
1150 #define Tbracket "["
1151 #define Tdot "."
1152 #define Talias "alias"
1153 #define Tbadnum "bad number"
1154 #define Tbadsubst "bad substitution"
1155 #define Tbg "bg"
1156 #define Tbad_bsize "bad shf/buf/bsize"
1157 #define Tbsize "bsize"
1158 #define Tbad_sig_ss "%s: bad signal '%s'"
1159 #define Tbad_sig_s "bad signal '%s'"
1160 #define Tsgbreak "*=break"
1161 #define Tbreak "break"
1162 #define T__builtin "-\\builtin"
1163 #define T_builtin "\\builtin"
1164 #define Tbuiltin "builtin"
1165 #define Toomem "can't allocate %zu data bytes"
1166 #define Tcant_cd "restricted shell - can't cd"
1167 #define Tcant_find "can't find"
1168 #define Tcant_open "can't open"
1169 #define Tbytes "bytes"
1170 #define Tbcat "!cat"
1171 #define Tcat "cat"
1172 #define Tcd "cd"
1173 #define T_command "-command"
1174 #define Tcommand "command"
1175 #define Tsgcontinue "*=continue"
1176 #define Tcontinue "continue"
1177 #define Tcreate "create"
1178 #define TELIF_unexpected "TELIF unexpected"
1179 #define TEXECSHELL "EXECSHELL"
1180 #define TENV "ENV"
1181 #define Tdsgexport "^*=export"
1182 #define Texport "export"
1183 #ifdef __OS2__
1184 #define Textproc "extproc"
1185 #endif
1186 #define Tfalse "false"
1187 #define Tfg "fg"
1188 #define Tfg_badsubst "fileglob: bad substitution"
1189 #define Tfile "file"
1190 #define Tfile_fd "function definition file"
1191 #define TFPATH "FPATH"
1192 #define T_function " function"
1193 #define Tfunction "function"
1194 #define T_funny_command "funny $()-command"
1195 #define Tgetopts "getopts"
1196 #define Thistory "history"
1197 #define Tintovfl "integer overflow %zu %c %zu prevented"
1198 #define Tinvname "%s: invalid %s name"
1199 #define Tjobs "jobs"
1200 #define Tjob_not_started "job not started"
1201 #define Tmksh "mksh"
1202 #define Tname "name"
1203 #define Tno_args "missing argument"
1204 #define Tno_OLDPWD "no OLDPWD"
1205 #define Tnot_ident "is not an identifier"
1206 #define Tnot_in_history "not in history"
1207 #define Tnot_found_s "%s not found"
1208 #define Tnot_found "not found"
1209 #define Tnot_started "not started"
1210 #define TOLDPWD "OLDPWD"
1211 #define Topen "open"
1212 #define To_o_reset " -o .reset"
1213 #define To_reset ".reset"
1214 #define TPATH "PATH"
1215 #define Tpo "+o"
1216 #define Tpv "pv"
1217 #define TpVv "Vpv"
1218 #define TPWD "PWD"
1219 #define Tread "read"
1220 #define Tdsgreadonly "^*=readonly"
1221 #define Treadonly "readonly"
1222 #define Tredirection_dup "can't finish (dup) redirection"
1223 #define Tredirection "redirection"
1224 #define Treal_sp1 "real "
1225 #define Treal_sp2 " real "
1226 #define TREPLY "REPLY"
1227 #define Treq_arg "requires an argument"
1228 #define Tselect "select"
1229 #define Tset "set"
1230 #define Tset_po "set +o"
1231 #define Tsghset "*=#set"
1232 #define Tsh "sh"
1233 #define TSHELL "SHELL"
1234 #define Tshell "shell"
1235 #define Tshf_read "shf_read"
1236 #define Tshf_write "shf_write"
1237 #define Tgsource "=source"
1238 #define Tsource "source"
1239 #define Tj_suspend "j_suspend"
1240 #define Tsuspend "suspend"
1241 #define Tsynerr "syntax error"
1242 #define Ttime "time"
1243 #define Ttoo_many_args "too many arguments"
1244 #define Ttoo_many_files "too many open files in shell"
1245 #define Ttrue "true"
1246 #define Ttty_fd_dupof "dup of tty fd"
1247 #define Ttty_fd "tty fd"
1248 #define Tdgtypeset "^=typeset"
1249 #define Ttypeset "typeset"
1250 #define Tugo "ugo"
1251 #define Tunalias "unalias"
1252 #define Tunexpected "unexpected"
1253 #define Tunexpected_type "%s: unexpected %s type %d"
1254 #define Tunknown_option "unknown option"
1255 #define Tunwind "unwind"
1256 #define Tuser_sp1 "user "
1257 #define Tuser_sp2 " user "
1258 #define Twrite "write"
1259 #define Tf__S " %S"
1260 #define Tf__d " %d"
1261 #define Tf_ss "%s%s"
1262 #define Tf__ss " %s%s"
1263 #define Tf__sN " %s\n"
1264 #define Tf_T "%T"
1265 #define Tf_dN "%d\n"
1266 #define Tf_s_ "%s "
1267 #define Tf_s_T "%s %T"
1268 #define Tf_s_s_sN "%s %s %s\n"
1269 #define Tf_s_s "%s %s"
1270 #define Tf__s_s " %s %s"
1271 #define Tf_s_sD_s "%s %s: %s"
1272 #define Tf_optfoo "%s%s-%c: %s"
1273 #define Tf_sD_ "%s: "
1274 #define Tf_szs "%s: %zd %s"
1275 #define Tf_parm "%s: parameter not set"
1276 #define Tf_coproc "-p: %s"
1277 #define Tf_cant_s "%s: can't %s"
1278 #define Tf_cant_ss_s "can't %s %s: %s"
1279 #define Tf_heredoc "here document '%s' unclosed"
1280 #if HAVE_MKNOD
1281 #define Tf_nonnum "non-numeric %s %s '%s'"
1282 #endif
1283 #define Tf_S_ "%S "
1284 #define Tf_S "%S"
1285 #define Tf_lu "%lu"
1286 #define Tf_toolarge "%s %s too large: %lu"
1287 #define Tf_ldfailed "%s %s(%d, %ld) failed: %s"
1288 #define Tf_sD_s_sD_s "%s: %s %s: %s"
1289 #define Tf_toomany "too many %ss"
1290 #define Tf_sd "%s %d"
1291 #define Tf_s "%s"
1292 #define Tft_end "%;"
1293 #define Tft_R "%R"
1294 #define Tf_d "%d"
1295 #define Tf_sD_s_qs "%s: %s '%s'"
1296 #define Tf_ro "read-only: %s"
1297 #define Tf_flags "%s: flags 0x%X"
1298 #define Tf_temp "can't %s temporary file %s: %s"
1299 #define Tf_ssfaileds "%s: %s failed: %s"
1300 #define Tf_sD_sD_s "%s: %s: %s"
1301 #define Tf__c_ "-%c "
1302 #define Tf_sD_s_s "%s: %s %s"
1303 #define Tf_sN "%s\n"
1304 #define Tf_sD_s "%s: %s"
1305 #define T_devtty "/dev/tty"
1306 #endif /* end of string pooling */
1307
1308 typedef uint8_t Temp_type;
1309 /* expanded heredoc */
1310 #define TT_HEREDOC_EXP 0
1311 /* temporary file used for history editing (fc -e) */
1312 #define TT_HIST_EDIT 1
1313 /* temporary file used during in-situ command substitution */
1314 #define TT_FUNSUB 2
1315
1316 /* temp/heredoc files. The file is removed when the struct is freed. */
1317 struct temp {
1318 struct temp *next;
1319 struct shf *shf;
1320 /* pid of process parsed here-doc */
1321 pid_t pid;
1322 Temp_type type;
1323 /* actually longer: name (variable length) */
1324 char tffn[3];
1325 };
1326
1327 /*
1328 * stdio and our IO routines
1329 */
1330
1331 #define shl_xtrace (&shf_iob[0]) /* for set -x */
1332 #define shl_stdout (&shf_iob[1])
1333 #define shl_out (&shf_iob[2])
1334 #ifdef DF
1335 #define shl_dbg (&shf_iob[3]) /* for DF() */
1336 #endif
1337 EXTERN bool shl_stdout_ok;
1338
1339 /*
1340 * trap handlers
1341 */
1342 typedef struct trap {
1343 const char *name; /* short name */
1344 const char *mess; /* descriptive name */
1345 char *trap; /* trap command */
1346 sig_t cursig; /* current handler (valid if TF_ORIG_* set) */
1347 sig_t shtrap; /* shell signal handler */
1348 int signal; /* signal number */
1349 int flags; /* TF_* */
1350 volatile sig_atomic_t set; /* trap pending */
1351 } Trap;
1352
1353 /* values for Trap.flags */
1354 #define TF_SHELL_USES BIT(0) /* shell uses signal, user can't change */
1355 #define TF_USER_SET BIT(1) /* user has (tried to) set trap */
1356 #define TF_ORIG_IGN BIT(2) /* original action was SIG_IGN */
1357 #define TF_ORIG_DFL BIT(3) /* original action was SIG_DFL */
1358 #define TF_EXEC_IGN BIT(4) /* restore SIG_IGN just before exec */
1359 #define TF_EXEC_DFL BIT(5) /* restore SIG_DFL just before exec */
1360 #define TF_DFL_INTR BIT(6) /* when received, default action is LINTR */
1361 #define TF_TTY_INTR BIT(7) /* tty generated signal (see j_waitj) */
1362 #define TF_CHANGED BIT(8) /* used by runtrap() to detect trap changes */
1363 #define TF_FATAL BIT(9) /* causes termination if not trapped */
1364
1365 /* values for setsig()/setexecsig() flags argument */
1366 #define SS_RESTORE_MASK 0x3 /* how to restore a signal before an exec() */
1367 #define SS_RESTORE_CURR 0 /* leave current handler in place */
1368 #define SS_RESTORE_ORIG 1 /* restore original handler */
1369 #define SS_RESTORE_DFL 2 /* restore to SIG_DFL */
1370 #define SS_RESTORE_IGN 3 /* restore to SIG_IGN */
1371 #define SS_FORCE BIT(3) /* set signal even if original signal ignored */
1372 #define SS_USER BIT(4) /* user is doing the set (ie, trap command) */
1373 #define SS_SHTRAP BIT(5) /* trap for internal use (ALRM, CHLD, WINCH) */
1374
1375 #define ksh_SIGEXIT 0 /* for trap EXIT */
1376 #define ksh_SIGERR ksh_NSIG /* for trap ERR */
1377
1378 EXTERN volatile sig_atomic_t trap; /* traps pending? */
1379 EXTERN volatile sig_atomic_t intrsig; /* pending trap interrupts command */
1380 EXTERN volatile sig_atomic_t fatal_trap; /* received a fatal signal */
1381 extern Trap sigtraps[ksh_NSIG + 1];
1382
1383 /* got_winch = 1 when we need to re-adjust the window size */
1384 #ifdef SIGWINCH
1385 EXTERN volatile sig_atomic_t got_winch E_INIT(1);
1386 #else
1387 #define got_winch true
1388 #endif
1389
1390 /*
1391 * TMOUT support
1392 */
1393 /* values for ksh_tmout_state */
1394 enum tmout_enum {
1395 TMOUT_EXECUTING = 0, /* executing commands */
1396 TMOUT_READING, /* waiting for input */
1397 TMOUT_LEAVING /* have timed out */
1398 };
1399 EXTERN unsigned int ksh_tmout;
1400 EXTERN enum tmout_enum ksh_tmout_state;
1401
1402 /* For "You have stopped jobs" message */
1403 EXTERN bool really_exit;
1404
1405 /*
1406 * fast character classes
1407 */
1408
1409 /* internal types, do not reference */
1410
1411 /* initially empty — filled at runtime from $IFS */
1412 #define CiIFS BIT(0)
1413 #define CiCNTRL BIT(1) /* \x01‥\x08\x0E‥\x1F\x7F */
1414 #define CiUPPER BIT(2) /* A‥Z */
1415 #define CiLOWER BIT(3) /* a‥z */
1416 #define CiHEXLT BIT(4) /* A‥Fa‥f */
1417 #define CiOCTAL BIT(5) /* 0‥7 */
1418 #define CiQCL BIT(6) /* &();| */
1419 #define CiALIAS BIT(7) /* !,.@ */
1420 #define CiQCX BIT(8) /* *[\\ */
1421 #define CiVAR1 BIT(9) /* !*@ */
1422 #define CiQCM BIT(10) /* /^~ */
1423 #define CiDIGIT BIT(11) /* 89 */
1424 #define CiQC BIT(12) /* "' */
1425 #define CiSPX BIT(13) /* \x0B\x0C */
1426 #define CiCURLY BIT(14) /* {} */
1427 #define CiANGLE BIT(15) /* <> */
1428 #define CiNUL BIT(16) /* \x00 */
1429 #define CiTAB BIT(17) /* \x09 */
1430 #define CiNL BIT(18) /* \x0A */
1431 #define CiCR BIT(19) /* \x0D */
1432 #define CiSP BIT(20) /* \x20 */
1433 #define CiHASH BIT(21) /* # */
1434 #define CiSS BIT(22) /* $ */
1435 #define CiPERCT BIT(23) /* % */
1436 #define CiPLUS BIT(24) /* + */
1437 #define CiMINUS BIT(25) /* - */
1438 #define CiCOLON BIT(26) /* : */
1439 #define CiEQUAL BIT(27) /* = */
1440 #define CiQUEST BIT(28) /* ? */
1441 #define CiBRACK BIT(29) /* [] */
1442 #define CiUNDER BIT(30) /* _ */
1443 #define CiGRAVE BIT(31) /* ` */
1444 /* out of space, but one for *@ would make sense, possibly others */
1445
1446 /* compile-time initialised, ASCII only */
1447 extern const uint32_t tpl_ctypes[128];
1448 /* run-time, contains C_IFS as well, full 2⁸ octet range */
1449 EXTERN uint32_t ksh_ctypes[256];
1450 /* first octet of $IFS, for concatenating "$*" */
1451 EXTERN char ifs0;
1452
1453 /* external types */
1454
1455 /* !%+,-.0‥9:@A‥Z[]_a‥z valid characters in alias names */
1456 #define C_ALIAS (CiALIAS | CiBRACK | CiCOLON | CiDIGIT | CiLOWER | CiMINUS | CiOCTAL | CiPERCT | CiPLUS | CiUNDER | CiUPPER)
1457 /* 0‥9A‥Za‥z alphanumerical */
1458 #define C_ALNUM (CiDIGIT | CiLOWER | CiOCTAL | CiUPPER)
1459 /* 0‥9A‥Z_a‥z alphanumerical plus underscore (“word character”) */
1460 #define C_ALNUX (CiDIGIT | CiLOWER | CiOCTAL | CiUNDER | CiUPPER)
1461 /* A‥Za‥z alphabetical (upper plus lower) */
1462 #define C_ALPHA (CiLOWER | CiUPPER)
1463 /* A‥Z_a‥z alphabetical plus underscore (identifier lead) */
1464 #define C_ALPHX (CiLOWER | CiUNDER | CiUPPER)
1465 /* \x01‥\x7F 7-bit ASCII except NUL */
1466 #define C_ASCII (CiALIAS | CiANGLE | CiBRACK | CiCNTRL | CiCOLON | CiCR | CiCURLY | CiDIGIT | CiEQUAL | CiGRAVE | CiHASH | CiLOWER | CiMINUS | CiNL | CiOCTAL | CiPERCT | CiPLUS | CiQC | CiQCL | CiQCM | CiQCX | CiQUEST | CiSP | CiSPX | CiSS | CiTAB | CiUNDER | CiUPPER)
1467 /* \x09\x20 tab and space */
1468 #define C_BLANK (CiSP | CiTAB)
1469 /* \x09\x20"' separator for completion */
1470 #define C_CFS (CiQC | CiSP | CiTAB)
1471 /* \x00‥\x1F\x7F POSIX control characters */
1472 #define C_CNTRL (CiCNTRL | CiCR | CiNL | CiNUL | CiSPX | CiTAB)
1473 /* 0‥9 decimal digits */
1474 #define C_DIGIT (CiDIGIT | CiOCTAL)
1475 /* &();`| editor x_locate_word() command */
1476 #define C_EDCMD (CiGRAVE | CiQCL)
1477 /* \x09\x0A\x20"&'():;<=>`| editor non-word characters */
1478 #define C_EDNWC (CiANGLE | CiCOLON | CiEQUAL | CiGRAVE | CiNL | CiQC | CiQCL | CiSP | CiTAB)
1479 /* "#$&'()*:;<=>?[\\`{|} editor quotes for tab completion */
1480 #define C_EDQ (CiANGLE | CiCOLON | CiCURLY | CiEQUAL | CiGRAVE | CiHASH | CiQC | CiQCL | CiQCX | CiQUEST | CiSS)
1481 /* !‥~ POSIX graphical (alphanumerical plus punctuation) */
1482 #define C_GRAPH (C_PUNCT | CiDIGIT | CiLOWER | CiOCTAL | CiUPPER)
1483 /* A‥Fa‥f hex letter */
1484 #define C_HEXLT CiHEXLT
1485 /* \x00 + $IFS IFS whitespace, IFS non-whitespace, NUL */
1486 #define C_IFS (CiIFS | CiNUL)
1487 /* \x09\x0A\x20 IFS whitespace */
1488 #define C_IFSWS (CiNL | CiSP | CiTAB)
1489 /* \x09\x0A\x20&();<>| (for the lexer) */
1490 #define C_LEX1 (CiANGLE | CiNL | CiQCL | CiSP | CiTAB)
1491 /* a‥z lowercase letters */
1492 #define C_LOWER CiLOWER
1493 /* not alnux or dollar separator for motion */
1494 #define C_MFS (CiALIAS | CiANGLE | CiBRACK | CiCNTRL | CiCOLON | CiCR | CiCURLY | CiEQUAL | CiGRAVE | CiHASH | CiMINUS | CiNL | CiNUL | CiPERCT | CiPLUS | CiQC | CiQCL | CiQCM | CiQCX | CiQUEST | CiSP | CiSPX | CiTAB)
1495 /* 0‥7 octal digit */
1496 #define C_OCTAL CiOCTAL
1497 /* !*+?@ pattern magical operator, except space */
1498 #define C_PATMO (CiPLUS | CiQUEST | CiVAR1)
1499 /* \x20‥~ POSIX printable characters (graph plus space) */
1500 #define C_PRINT (C_GRAPH | CiSP)
1501 /* !"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~ POSIX punctuation */
1502 #define C_PUNCT (CiALIAS | CiANGLE | CiBRACK | CiCOLON | CiCURLY | CiEQUAL | CiGRAVE | CiHASH | CiMINUS | CiPERCT | CiPLUS | CiQC | CiQCL | CiQCM | CiQCX | CiQUEST | CiSS | CiUNDER)
1503 /* \x09\x0A"#$&'()*;<=>?[\\]`| characters requiring quoting, minus space */
1504 #define C_QUOTE (CiANGLE | CiBRACK | CiEQUAL | CiGRAVE | CiHASH | CiNL | CiQC | CiQCL | CiQCX | CiQUEST | CiSS | CiTAB)
1505 /* 0‥9A‥Fa‥f hexadecimal digit */
1506 #define C_SEDEC (CiDIGIT | CiHEXLT | CiOCTAL)
1507 /* \x09‥\x0D\x20 POSIX space class */
1508 #define C_SPACE (CiCR | CiNL | CiSP | CiSPX | CiTAB)
1509 /* +-=? substitution operations with word */
1510 #define C_SUB1 (CiEQUAL | CiMINUS | CiPLUS | CiQUEST)
1511 /* #% substitution operations with pattern */
1512 #define C_SUB2 (CiHASH | CiPERCT)
1513 /* A‥Z uppercase letters */
1514 #define C_UPPER CiUPPER
1515 /* !#$*-?@ substitution parameters, other than positional */
1516 #define C_VAR1 (CiHASH | CiMINUS | CiQUEST | CiSS | CiVAR1)
1517
1518 /* individual chars you might like */
1519 #define C_ANGLE CiANGLE /* <> angle brackets */
1520 #define C_COLON CiCOLON /* : colon */
1521 #define C_CR CiCR /* \x0D ASCII carriage return */
1522 #define C_DOLAR CiSS /* $ dollar sign */
1523 #define C_EQUAL CiEQUAL /* = equals sign */
1524 #define C_GRAVE CiGRAVE /* ` accent gravis */
1525 #define C_HASH CiHASH /* # hash sign */
1526 #define C_LF CiNL /* \x0A ASCII line feed */
1527 #define C_MINUS CiMINUS /* - hyphen-minus */
1528 #ifdef MKSH_WITH_TEXTMODE
1529 #define C_NL (CiNL | CiCR) /* CR or LF under OS/2 TEXTMODE */
1530 #else
1531 #define C_NL CiNL /* LF only like under Unix */
1532 #endif
1533 #define C_NUL CiNUL /* \x00 ASCII NUL */
1534 #define C_PLUS CiPLUS /* + plus sign */
1535 #define C_QC CiQC /* "' quote characters */
1536 #define C_QUEST CiQUEST /* ? question mark */
1537 #define C_SPC CiSP /* \x20 ASCII space */
1538 #define C_TAB CiTAB /* \x09 ASCII horizontal tabulator */
1539 #define C_UNDER CiUNDER /* _ underscore */
1540
1541 /* identity transform of octet */
1542 #if defined(DEBUG) && defined(__GNUC__) && !defined(__ICC) && \
1543 !defined(__INTEL_COMPILER) && !defined(__SUNPRO_C)
1544 extern unsigned int eek_ord;
1545 #define ORD(c) ((size_t)(c) > 0xFF ? eek_ord : \
1546 ((unsigned int)(unsigned char)(c)))
1547 #define ord(c) __builtin_choose_expr( \
1548 __builtin_types_compatible_p(__typeof__(c), char) || \
1549 __builtin_types_compatible_p(__typeof__(c), unsigned char), \
1550 ((unsigned int)(unsigned char)(c)), ({ \
1551 size_t ord_c = (c); \
1552 \
1553 if (ord_c > (size_t)0xFFU) \
1554 internal_errorf("%s:%d:ord(%zX)", \
1555 __FILE__, __LINE__, ord_c); \
1556 ((unsigned int)(unsigned char)(ord_c)); \
1557 }))
1558 #else
1559 #define ord(c) ((unsigned int)(unsigned char)(c))
1560 #define ORD(c) ord(c) /* may evaluate arguments twice */
1561 #endif
1562 #if defined(MKSH_EBCDIC) || defined(MKSH_FAUX_EBCDIC)
1563 EXTERN unsigned short ebcdic_map[256];
1564 EXTERN unsigned char ebcdic_rtt_toascii[256];
1565 EXTERN unsigned char ebcdic_rtt_fromascii[256];
1566 extern void ebcdic_init(void);
1567 /* one-way to-ascii-or-high conversion, for POSIX locale ordering */
1568 #define asciibetical(c) ((unsigned int)ebcdic_map[(unsigned char)(c)])
1569 /* two-way round-trip conversion, for general use */
1570 #define rtt2asc(c) ebcdic_rtt_toascii[(unsigned char)(c)]
1571 #define asc2rtt(c) ebcdic_rtt_fromascii[(unsigned char)(c)]
1572 /* case-independent char comparison */
1573 #define ksh_eq(c,u,l) (ord(c) == ord(u) || ord(c) == ord(l))
1574 #else
1575 #define asciibetical(c) ord(c)
1576 #define rtt2asc(c) ((unsigned char)(c))
1577 #define asc2rtt(c) ((unsigned char)(c))
1578 #define ksh_eq(c,u,l) ((ord(c) | 0x20) == ord(l))
1579 #endif
1580 /* control character foo */
1581 #ifdef MKSH_EBCDIC
1582 #define ksh_isctrl(c) (ord(c) < 0x40 || ord(c) == 0xFF)
1583 #else
1584 #define ksh_isctrl(c) ((ord(c) & 0x7F) < 0x20 || ord(c) == 0x7F)
1585 #endif
1586 /* new fast character classes */
1587 #define ctype(c,t) tobool(ksh_ctypes[ord(c)] & (t))
1588 #define cinttype(c,t) ((c) >= 0 && (c) <= 0xFF ? \
1589 tobool(ksh_ctypes[(unsigned char)(c)] & (t)) : false)
1590 /* helper functions */
1591 #define ksh_isdash(s) tobool(ord((s)[0]) == '-' && ord((s)[1]) == '\0')
1592 /* invariant distance even in EBCDIC */
1593 #define ksh_tolower(c) (ctype(c, C_UPPER) ? (c) - 'A' + 'a' : (c))
1594 #define ksh_toupper(c) (ctype(c, C_LOWER) ? (c) - 'a' + 'A' : (c))
1595 /* strictly speaking rtt2asc() here, but this works even in EBCDIC */
1596 #define ksh_numdig(c) (ord(c) - ORD('0'))
1597 #define ksh_numuc(c) (rtt2asc(c) - rtt2asc('A'))
1598 #define ksh_numlc(c) (rtt2asc(c) - rtt2asc('a'))
1599 #define ksh_toctrl(c) asc2rtt(ord(c) == ORD('?') ? 0x7F : rtt2asc(c) & 0x9F)
1600 #define ksh_unctrl(c) asc2rtt(rtt2asc(c) ^ 0x40U)
1601
1602 #ifdef MKSH_SMALL
1603 #define SMALLP(x) /* nothing */
1604 #else
1605 #define SMALLP(x) , x
1606 #endif
1607
1608 /* Argument parsing for built-in commands and getopts command */
1609
1610 /* Values for Getopt.flags */
1611 #define GF_ERROR BIT(0) /* call errorf() if there is an error */
1612 #define GF_PLUSOPT BIT(1) /* allow +c as an option */
1613 #define GF_NONAME BIT(2) /* don't print argv[0] in errors */
1614
1615 /* Values for Getopt.info */
1616 #define GI_MINUS BIT(0) /* an option started with -... */
1617 #define GI_PLUS BIT(1) /* an option started with +... */
1618 #define GI_MINUSMINUS BIT(2) /* arguments were ended with -- */
1619
1620 /* in case some OS defines these */
1621 #undef optarg
1622 #undef optind
1623
1624 typedef struct {
1625 const char *optarg;
1626 int optind;
1627 int uoptind; /* what user sees in $OPTIND */
1628 int flags; /* see GF_* */
1629 int info; /* see GI_* */
1630 unsigned int p; /* 0 or index into argv[optind - 1] */
1631 char buf[2]; /* for bad option OPTARG value */
1632 } Getopt;
1633
1634 EXTERN Getopt builtin_opt; /* for shell builtin commands */
1635 EXTERN Getopt user_opt; /* parsing state for getopts builtin command */
1636
1637 /* This for co-processes */
1638
1639 /* something that won't (realisticly) wrap */
1640 typedef int Coproc_id;
1641
1642 struct coproc {
1643 void *job; /* 0 or job of co-process using input pipe */
1644 int read; /* pipe from co-process's stdout */
1645 int readw; /* other side of read (saved temporarily) */
1646 int write; /* pipe to co-process's stdin */
1647 int njobs; /* number of live jobs using output pipe */
1648 Coproc_id id; /* id of current output pipe */
1649 };
1650 EXTERN struct coproc coproc;
1651
1652 #ifndef MKSH_NOPROSPECTOFWORK
1653 /* used in jobs.c and by coprocess stuff in exec.c and select() calls */
1654 EXTERN sigset_t sm_default, sm_sigchld;
1655 #endif
1656
1657 /* name of called builtin function (used by error functions) */
1658 EXTERN const char *builtin_argv0;
1659 /* is called builtin a POSIX special builtin? (error functions only) */
1660 EXTERN bool builtin_spec;
1661
1662 /* current working directory */
1663 EXTERN char *current_wd;
1664
1665 /* input line size */
1666 #ifdef MKSH_SMALL
1667 #define LINE (4096 - ALLOC_OVERHEAD)
1668 #else
1669 #define LINE (16384 - ALLOC_OVERHEAD)
1670 #endif
1671 /* columns and lines of the tty */
1672 EXTERN mksh_ari_t x_cols E_INIT(80);
1673 EXTERN mksh_ari_t x_lins E_INIT(24);
1674
1675
1676 /* Determine the location of the system (common) profile */
1677
1678 #ifndef MKSH_DEFAULT_PROFILEDIR
1679 #define MKSH_DEFAULT_PROFILEDIR MKSH_UNIXROOT "/etc"
1680 #endif
1681
1682 #define MKSH_SYSTEM_PROFILE MKSH_DEFAULT_PROFILEDIR "/profile"
1683 #define MKSH_SUID_PROFILE MKSH_DEFAULT_PROFILEDIR "/suid_profile"
1684
1685
1686 /* Used by v_evaluate() and setstr() to control action when error occurs */
1687 #define KSH_UNWIND_ERROR 0 /* unwind the stack (kshlongjmp) */
1688 #define KSH_RETURN_ERROR 1 /* return 1/0 for success/failure */
1689
1690 /*
1691 * Shell file I/O routines
1692 */
1693
1694 #define SHF_BSIZE 512
1695
1696 #define shf_fileno(shf) ((shf)->fd)
1697 #define shf_setfileno(shf,nfd) ((shf)->fd = (nfd))
1698 #define shf_getc_i(shf) ((shf)->rnleft > 0 ? \
1699 (shf)->rnleft--, (int)ord(*(shf)->rp++) : \
1700 shf_getchar(shf))
1701 #define shf_putc_i(c,shf) ((shf)->wnleft == 0 ? \
1702 shf_putchar((uint8_t)(c), (shf)) : \
1703 ((shf)->wnleft--, *(shf)->wp++ = (c)))
1704 #define shf_eof(shf) ((shf)->flags & SHF_EOF)
1705 #define shf_error(shf) ((shf)->flags & SHF_ERROR)
1706 #define shf_errno(shf) ((shf)->errnosv)
1707 #define shf_clearerr(shf) ((shf)->flags &= ~(SHF_EOF | SHF_ERROR))
1708
1709 /* Flags passed to shf_*open() */
1710 #define SHF_RD 0x0001
1711 #define SHF_WR 0x0002
1712 #define SHF_RDWR (SHF_RD | SHF_WR)
1713 #define SHF_ACCMODE 0x0003 /* mask */
1714 #define SHF_GETFL 0x0004 /* use fcntl() to figure RD/WR flags */
1715 #define SHF_UNBUF 0x0008 /* unbuffered I/O */
1716 #define SHF_CLEXEC 0x0010 /* set close on exec flag */
1717 #define SHF_MAPHI 0x0020 /* make fd > FDBASE (and close orig)
1718 * (shf_open() only) */
1719 #define SHF_DYNAMIC 0x0040 /* string: increase buffer as needed */
1720 #define SHF_INTERRUPT 0x0080 /* EINTR in read/write causes error */
1721 /* Flags used internally */
1722 #define SHF_STRING 0x0100 /* a string, not a file */
1723 #define SHF_ALLOCS 0x0200 /* shf and shf->buf were alloc()ed */
1724 #define SHF_ALLOCB 0x0400 /* shf->buf was alloc()ed */
1725 #define SHF_ERROR 0x0800 /* read()/write() error */
1726 #define SHF_EOF 0x1000 /* read eof (sticky) */
1727 #define SHF_READING 0x2000 /* currently reading: rnleft,rp valid */
1728 #define SHF_WRITING 0x4000 /* currently writing: wnleft,wp valid */
1729
1730
1731 struct shf {
1732 Area *areap; /* area shf/buf were allocated in */
1733 unsigned char *rp; /* read: current position in buffer */
1734 unsigned char *wp; /* write: current position in buffer */
1735 unsigned char *buf; /* buffer */
1736 ssize_t bsize; /* actual size of buf */
1737 ssize_t rbsize; /* size of buffer (1 if SHF_UNBUF) */
1738 ssize_t rnleft; /* read: how much data left in buffer */
1739 ssize_t wbsize; /* size of buffer (0 if SHF_UNBUF) */
1740 ssize_t wnleft; /* write: how much space left in buffer */
1741 int flags; /* see SHF_* */
1742 int fd; /* file descriptor */
1743 int errnosv; /* saved value of errno after error */
1744 };
1745
1746 extern struct shf shf_iob[];
1747
1748 struct table {
1749 Area *areap; /* area to allocate entries */
1750 struct tbl **tbls; /* hashed table items */
1751 size_t nfree; /* free table entries */
1752 uint8_t tshift; /* table size (2^tshift) */
1753 };
1754
1755 /* table item */
1756 struct tbl {
1757 /* Area to allocate from */
1758 Area *areap;
1759 /* value */
1760 union {
1761 char *s; /* string */
1762 mksh_ari_t i; /* integer */
1763 mksh_uari_t u; /* unsigned integer */
1764 int (*f)(const char **); /* built-in command */
1765 struct op *t; /* "function" tree */
1766 } val;
1767 union {
1768 struct tbl *array; /* array values */
1769 const char *fpath; /* temporary path to undef function */
1770 } u;
1771 union {
1772 int field; /* field with for -L/-R/-Z */
1773 int errnov; /* CEXEC/CTALIAS */
1774 } u2;
1775 union {
1776 uint32_t hval; /* hash(name) */
1777 uint32_t index; /* index for an array */
1778 } ua;
1779 /*
1780 * command type (see below), base (if INTEGER),
1781 * offset from val.s of value (if EXPORT)
1782 */
1783 int type;
1784 /* flags (see below) */
1785 uint32_t flag;
1786
1787 /* actually longer: name (variable length) */
1788 char name[4];
1789 };
1790
1791 EXTERN struct tbl *vtemp;
1792 /* set by isglobal(), global() and local() */
1793 EXTERN bool last_lookup_was_array;
1794
1795 /* common flag bits */
1796 #define ALLOC BIT(0) /* val.s has been allocated */
1797 #define DEFINED BIT(1) /* is defined in block */
1798 #define ISSET BIT(2) /* has value, vp->val.[si] */
1799 #define EXPORT BIT(3) /* exported variable/function */
1800 #define TRACE BIT(4) /* var: user flagged, func: execution tracing */
1801 /* (start non-common flags at 8) */
1802 /* flag bits used for variables */
1803 #define SPECIAL BIT(8) /* PATH, IFS, SECONDS, etc */
1804 #define INTEGER BIT(9) /* val.i contains integer value */
1805 #define RDONLY BIT(10) /* read-only variable */
1806 #define LOCAL BIT(11) /* for local typeset() */
1807 #define ARRAY BIT(13) /* array */
1808 #define LJUST BIT(14) /* left justify */
1809 #define RJUST BIT(15) /* right justify */
1810 #define ZEROFIL BIT(16) /* 0 filled if RJUSTIFY, strip 0s if LJUSTIFY */
1811 #define LCASEV BIT(17) /* convert to lower case */
1812 #define UCASEV_AL BIT(18) /* convert to upper case / autoload function */
1813 #define INT_U BIT(19) /* unsigned integer */
1814 #define INT_L BIT(20) /* long integer (no-op but used as magic) */
1815 #define IMPORT BIT(21) /* flag to typeset(): no arrays, must have = */
1816 #define LOCAL_COPY BIT(22) /* with LOCAL - copy attrs from existing var */
1817 #define EXPRINEVAL BIT(23) /* contents currently being evaluated */
1818 #define EXPRLVALUE BIT(24) /* useable as lvalue (temp flag) */
1819 #define AINDEX BIT(25) /* array index >0 = ua.index filled in */
1820 #define ASSOC BIT(26) /* ARRAY ? associative : reference */
1821 /* flag bits used for taliases/builtins/aliases/keywords/functions */
1822 #define KEEPASN BIT(8) /* keep command assignments (eg, var=x cmd) */
1823 #define FINUSE BIT(9) /* function being executed */
1824 #define FDELETE BIT(10) /* function deleted while it was executing */
1825 #define FKSH BIT(11) /* function defined with function x (vs x()) */
1826 #define SPEC_BI BIT(12) /* a POSIX special builtin */
1827 #define LOWER_BI BIT(13) /* (with LOW_BI) override even w/o flags */
1828 #define LOW_BI BIT(14) /* external utility overrides built-in one */
1829 #define DECL_UTIL BIT(15) /* is declaration utility */
1830 #define DECL_FWDR BIT(16) /* is declaration utility forwarder */
1831 #define NEXTLOC_BI BIT(17) /* needs BF_RESETSPEC on e->loc */
1832
1833 /*
1834 * Attributes that can be set by the user (used to decide if an unset
1835 * param should be repoted by set/typeset). Does not include ARRAY or
1836 * LOCAL.
1837 */
1838 #define USERATTRIB (EXPORT | INTEGER | RDONLY | LJUST | RJUST | ZEROFIL | \
1839 LCASEV | UCASEV_AL | INT_U | INT_L)
1840
1841 #define arrayindex(vp) ((unsigned long)((vp)->flag & AINDEX ? \
1842 (vp)->ua.index : 0))
1843
1844 enum namerefflag {
1845 SRF_NOP,
1846 SRF_ENABLE,
1847 SRF_DISABLE
1848 };
1849
1850 /* command types */
1851 #define CNONE 0 /* undefined */
1852 #define CSHELL 1 /* built-in */
1853 #define CFUNC 2 /* function */
1854 #define CEXEC 4 /* executable command */
1855 #define CALIAS 5 /* alias */
1856 #define CKEYWD 6 /* keyword */
1857 #define CTALIAS 7 /* tracked alias */
1858
1859 /* Flags for findcom()/comexec() */
1860 #define FC_SPECBI BIT(0) /* special builtin */
1861 #define FC_FUNC BIT(1) /* function */
1862 #define FC_NORMBI BIT(2) /* not special builtin */
1863 #define FC_BI (FC_SPECBI | FC_NORMBI)
1864 #define FC_PATH BIT(3) /* do path search */
1865 #define FC_DEFPATH BIT(4) /* use default path in path search */
1866 #define FC_WHENCE BIT(5) /* for use by command and whence */
1867
1868 #define AF_ARGV_ALLOC 0x1 /* argv[] array allocated */
1869 #define AF_ARGS_ALLOCED 0x2 /* argument strings allocated */
1870 #define AI_ARGV(a,i) ((i) == 0 ? (a).argv[0] : (a).argv[(i) - (a).skip])
1871 #define AI_ARGC(a) ((a).ai_argc - (a).skip)
1872
1873 /* Argument info. Used for $#, $* for shell, functions, includes, etc. */
1874 struct arg_info {
1875 const char **argv;
1876 int flags; /* AF_* */
1877 int ai_argc;
1878 int skip; /* first arg is argv[0], second is argv[1 + skip] */
1879 };
1880
1881 /*
1882 * activation record for function blocks
1883 */
1884 struct block {
1885 Area area; /* area to allocate things */
1886 const char **argv;
1887 char *error; /* error handler */
1888 char *exit; /* exit handler */
1889 struct block *next; /* enclosing block */
1890 struct table vars; /* local variables */
1891 struct table funs; /* local functions */
1892 Getopt getopts_state;
1893 int argc;
1894 int flags; /* see BF_* */
1895 };
1896
1897 /* Values for struct block.flags */
1898 #define BF_DOGETOPTS BIT(0) /* save/restore getopts state */
1899 #define BF_STOPENV BIT(1) /* do not export further */
1900 /* BF_RESETSPEC and NEXTLOC_BI must be numerically identical! */
1901 #define BF_RESETSPEC BIT(17) /* use ->next for set and shift */
1902
1903 /*
1904 * Used by ktwalk() and ktnext() routines.
1905 */
1906 struct tstate {
1907 struct tbl **next;
1908 ssize_t left;
1909 };
1910
1911 EXTERN struct table taliases; /* tracked aliases */
1912 EXTERN struct table builtins; /* built-in commands */
1913 EXTERN struct table aliases; /* aliases */
1914 EXTERN struct table keywords; /* keywords */
1915 #ifndef MKSH_NOPWNAM
1916 EXTERN struct table homedirs; /* homedir() cache */
1917 #endif
1918
1919 struct builtin {
1920 const char *name;
1921 int (*func)(const char **);
1922 };
1923
1924 extern const struct builtin mkshbuiltins[];
1925
1926 /* values for set_prompt() */
1927 #define PS1 0 /* command */
1928 #define PS2 1 /* command continuation */
1929
1930 EXTERN char *path; /* copy of either PATH or def_path */
1931 EXTERN const char *def_path; /* path to use if PATH not set */
1932 EXTERN char *tmpdir; /* TMPDIR value */
1933 EXTERN const char *prompt;
1934 EXTERN uint8_t cur_prompt; /* PS1 or PS2 */
1935 EXTERN int current_lineno; /* LINENO value */
1936
1937 /*
1938 * Description of a command or an operation on commands.
1939 */
1940 struct op {
1941 const char **args; /* arguments to a command */
1942 char **vars; /* variable assignments */
1943 struct ioword **ioact; /* IO actions (eg, < > >>) */
1944 struct op *left, *right; /* descendents */
1945 char *str; /* word for case; identifier for for,
1946 * select, and functions;
1947 * path to execute for TEXEC;
1948 * time hook for TCOM.
1949 */
1950 int lineno; /* TCOM/TFUNC: LINENO for this */
1951 short type; /* operation type, see below */
1952 /* WARNING: newtp(), tcopy() use evalflags = 0 to clear union */
1953 union {
1954 /* TCOM: arg expansion eval() flags */
1955 short evalflags;
1956 /* TFUNC: function x (vs x()) */
1957 short ksh_func;
1958 /* TPAT: termination character */
1959 char charflag;
1960 } u;
1961 };
1962
1963 /* Tree.type values */
1964 #define TEOF 0
1965 #define TCOM 1 /* command */
1966 #define TPAREN 2 /* (c-list) */
1967 #define TPIPE 3 /* a | b */
1968 #define TLIST 4 /* a ; b */
1969 #define TOR 5 /* || */
1970 #define TAND 6 /* && */
1971 #define TBANG 7 /* ! */
1972 #define TDBRACKET 8 /* [[ .. ]] */
1973 #define TFOR 9
1974 #define TSELECT 10
1975 #define TCASE 11
1976 #define TIF 12
1977 #define TWHILE 13
1978 #define TUNTIL 14
1979 #define TELIF 15
1980 #define TPAT 16 /* pattern in case */
1981 #define TBRACE 17 /* {c-list} */
1982 #define TASYNC 18 /* c & */
1983 #define TFUNCT 19 /* function name { command; } */
1984 #define TTIME 20 /* time pipeline */
1985 #define TEXEC 21 /* fork/exec eval'd TCOM */
1986 #define TCOPROC 22 /* coprocess |& */
1987
1988 /*
1989 * prefix codes for words in command tree
1990 */
1991 #define EOS 0 /* end of string */
1992 #define CHAR 1 /* unquoted character */
1993 #define QCHAR 2 /* quoted character */
1994 #define COMSUB 3 /* $() substitution (0 terminated) */
1995 #define EXPRSUB 4 /* $(()) substitution (0 terminated) */
1996 #define OQUOTE 5 /* opening " or ' */
1997 #define CQUOTE 6 /* closing " or ' */
1998 #define OSUBST 7 /* opening ${ subst (followed by { or X) */
1999 #define CSUBST 8 /* closing } of above (followed by } or X) */
2000 #define OPAT 9 /* open pattern: *(, @(, etc. */
2001 #define SPAT 10 /* separate pattern: | */
2002 #define CPAT 11 /* close pattern: ) */
2003 #define ADELIM 12 /* arbitrary delimiter: ${foo:2:3} ${foo/bar/baz} */
2004 #define FUNSUB 14 /* ${ foo;} substitution (NUL terminated) */
2005 #define VALSUB 15 /* ${|foo;} substitution (NUL terminated) */
2006 #define COMASUB 16 /* `…` substitution (COMSUB but expand aliases) */
2007 #define FUNASUB 17 /* function substitution but expand aliases */
2008
2009 /*
2010 * IO redirection
2011 */
2012 struct ioword {
2013 char *ioname; /* filename (unused if heredoc) */
2014 char *delim; /* delimiter for <<, <<- */
2015 char *heredoc; /* content of heredoc */
2016 unsigned short ioflag; /* action (below) */
2017 short unit; /* unit (fd) affected */
2018 };
2019
2020 /* ioword.flag - type of redirection */
2021 #define IOTYPE 0xF /* type: bits 0:3 */
2022 #define IOREAD 0x1 /* < */
2023 #define IOWRITE 0x2 /* > */
2024 #define IORDWR 0x3 /* <>: todo */
2025 #define IOHERE 0x4 /* << (here file) */
2026 #define IOCAT 0x5 /* >> */
2027 #define IODUP 0x6 /* <&/>& */
2028 #define IOEVAL BIT(4) /* expand in << */
2029 #define IOSKIP BIT(5) /* <<-, skip ^\t* */
2030 #define IOCLOB BIT(6) /* >|, override -o noclobber */
2031 #define IORDUP BIT(7) /* x<&y (as opposed to x>&y) */
2032 #define IODUPSELF BIT(8) /* x>&x (as opposed to x>&y) */
2033 #define IONAMEXP BIT(9) /* name has been expanded */
2034 #define IOBASH BIT(10) /* &> etc. */
2035 #define IOHERESTR BIT(11) /* <<< (here string) */
2036 #define IONDELIM BIT(12) /* null delimiter (<<) */
2037
2038 /* execute/exchild flags */
2039 #define XEXEC BIT(0) /* execute without forking */
2040 #define XFORK BIT(1) /* fork before executing */
2041 #define XBGND BIT(2) /* command & */
2042 #define XPIPEI BIT(3) /* input is pipe */
2043 #define XPIPEO BIT(4) /* output is pipe */
2044 #define XXCOM BIT(5) /* `...` command */
2045 #define XPCLOSE BIT(6) /* exchild: close close_fd in parent */
2046 #define XCCLOSE BIT(7) /* exchild: close close_fd in child */
2047 #define XERROK BIT(8) /* non-zero exit ok (for set -e) */
2048 #define XCOPROC BIT(9) /* starting a co-process */
2049 #define XTIME BIT(10) /* timing TCOM command */
2050 #define XPIPEST BIT(11) /* want PIPESTATUS */
2051
2052 /*
2053 * flags to control expansion of words (assumed by t->evalflags to fit
2054 * in a short)
2055 */
2056 #define DOBLANK BIT(0) /* perform blank interpretation */
2057 #define DOGLOB BIT(1) /* expand [?* */
2058 #define DOPAT BIT(2) /* quote *?[ */
2059 #define DOTILDE BIT(3) /* normal ~ expansion (first char) */
2060 #define DONTRUNCOMMAND BIT(4) /* do not run $(command) things */
2061 #define DOASNTILDE BIT(5) /* assignment ~ expansion (after =, :) */
2062 #define DOBRACE BIT(6) /* used by expand(): do brace expansion */
2063 #define DOMAGIC BIT(7) /* used by expand(): string contains MAGIC */
2064 #define DOTEMP BIT(8) /* dito: in word part of ${..[%#=?]..} */
2065 #define DOVACHECK BIT(9) /* var assign check (for typeset, set, etc) */
2066 #define DOMARKDIRS BIT(10) /* force markdirs behaviour */
2067 #define DOTCOMEXEC BIT(11) /* not an eval flag, used by sh -c hack */
2068 #define DOSCALAR BIT(12) /* change field handling to non-list context */
2069 #define DOHEREDOC BIT(13) /* change scalar handling to heredoc body */
2070 #define DOHERESTR BIT(14) /* append a newline char */
2071 #define DODBMAGIC BIT(15) /* add magic to expansions for [[ x = $y ]] */
2072
2073 #define X_EXTRA 20 /* this many extra bytes in X string */
2074 #if defined(MKSH_SMALL) && !defined(MKSH_SMALL_BUT_FAST)
2075 #define X_WASTE 15 /* allowed extra bytes to avoid shrinking, */
2076 #else
2077 #define X_WASTE 255 /* … must be 2ⁿ-1 */
2078 #endif
2079
2080 typedef struct XString {
2081 /* beginning of string */
2082 char *beg;
2083 /* length of allocated area, minus safety margin */
2084 size_t len;
2085 /* end of string */
2086 char *end;
2087 /* memory area used */
2088 Area *areap;
2089 } XString;
2090
2091 /* initialise expandable string */
2092 #define XinitN(xs,length,area) do { \
2093 (xs).len = (length); \
2094 (xs).areap = (area); \
2095 (xs).beg = alloc((xs).len + X_EXTRA, (xs).areap); \
2096 (xs).end = (xs).beg + (xs).len; \
2097 } while (/* CONSTCOND */ 0)
2098 #define Xinit(xs,xp,length,area) do { \
2099 XinitN((xs), (length), (area)); \
2100 (xp) = (xs).beg; \
2101 } while (/* CONSTCOND */ 0)
2102
2103 /* stuff char into string */
2104 #define Xput(xs,xp,c) (*xp++ = (c))
2105
2106 /* check if there are at least n bytes left */
2107 #define XcheckN(xs,xp,n) do { \
2108 ssize_t more = ((xp) + (n)) - (xs).end; \
2109 if (more > 0) \
2110 (xp) = Xcheck_grow(&(xs), (xp), (size_t)more); \
2111 } while (/* CONSTCOND */ 0)
2112
2113 /* check for overflow, expand string */
2114 #define Xcheck(xs,xp) XcheckN((xs), (xp), 1)
2115
2116 /* free string */
2117 #define Xfree(xs,xp) afree((xs).beg, (xs).areap)
2118
2119 /* close, return string */
2120 #define Xclose(xs,xp) aresize((xs).beg, (xp) - (xs).beg, (xs).areap)
2121
2122 /* beginning of string */
2123 #define Xstring(xs,xp) ((xs).beg)
2124
2125 #define Xnleft(xs,xp) ((xs).end - (xp)) /* may be less than 0 */
2126 #define Xlength(xs,xp) ((xp) - (xs).beg)
2127 #define Xsize(xs,xp) ((xs).end - (xs).beg)
2128 #define Xsavepos(xs,xp) ((xp) - (xs).beg)
2129 #define Xrestpos(xs,xp,n) ((xs).beg + (n))
2130
2131 char *Xcheck_grow(XString *, const char *, size_t);
2132
2133 /*
2134 * expandable vector of generic pointers
2135 */
2136
2137 typedef struct {
2138 /* beginning of allocated area */
2139 void **beg;
2140 /* currently used number of entries */
2141 size_t len;
2142 /* allocated number of entries */
2143 size_t siz;
2144 } XPtrV;
2145
2146 #define XPinit(x,n) do { \
2147 (x).siz = (n); \
2148 (x).len = 0; \
2149 (x).beg = alloc2((x).siz, sizeof(void *), ATEMP); \
2150 } while (/* CONSTCOND */ 0) \
2151
2152 #define XPput(x,p) do { \
2153 if ((x).len == (x).siz) { \
2154 (x).beg = aresize2((x).beg, (x).siz, \
2155 2 * sizeof(void *), ATEMP); \
2156 (x).siz <<= 1; \
2157 } \
2158 (x).beg[(x).len++] = (p); \
2159 } while (/* CONSTCOND */ 0)
2160
2161 #define XPptrv(x) ((x).beg)
2162 #define XPsize(x) ((x).len)
2163 #define XPclose(x) aresize2((x).beg, XPsize(x), sizeof(void *), ATEMP)
2164 #define XPfree(x) afree((x).beg, ATEMP)
2165
2166 /* for print_columns */
2167
2168 struct columnise_opts {
2169 struct shf *shf;
2170 char linesep;
2171 bool do_last;
2172 bool prefcol;
2173 };
2174
2175 /*
2176 * Lexer internals
2177 */
2178
2179 typedef struct source Source;
2180 struct source {
2181 /* input buffer */
2182 XString xs;
2183 /* memory area, also checked in reclaim() */
2184 Area *areap;
2185 /* stacked source */
2186 Source *next;
2187 /* input pointer */
2188 const char *str;
2189 /* start of current buffer */
2190 const char *start;
2191 /* input file name */
2192 const char *file;
2193 /* extra data */
2194 union {
2195 /* string[] */
2196 const char **strv;
2197 /* shell file */
2198 struct shf *shf;
2199 /* alias (SF_HASALIAS) */
2200 struct tbl *tblp;
2201 /* (also for SREREAD) */
2202 char *freeme;
2203 } u;
2204 /* flags */
2205 int flags;
2206 /* input type */
2207 int type;
2208 /* line number */
2209 int line;
2210 /* line the error occurred on (0 if not set) */
2211 int errline;
2212 /* buffer for ungetsc() (SREREAD) and alias (SALIAS) */
2213 char ugbuf[2];
2214 };
2215
2216 /* Source.type values */
2217 #define SEOF 0 /* input EOF */
2218 #define SFILE 1 /* file input */
2219 #define SSTDIN 2 /* read stdin */
2220 #define SSTRING 3 /* string */
2221 #define SWSTR 4 /* string without \n */
2222 #define SWORDS 5 /* string[] */
2223 #define SWORDSEP 6 /* string[] separator */
2224 #define SALIAS 7 /* alias expansion */
2225 #define SREREAD 8 /* read ahead to be re-scanned */
2226 #define SSTRINGCMDLINE 9 /* string from "mksh -c ..." */
2227
2228 /* Source.flags values */
2229 #define SF_ECHO BIT(0) /* echo input to shlout */
2230 #define SF_ALIAS BIT(1) /* faking space at end of alias */
2231 #define SF_ALIASEND BIT(2) /* faking space at end of alias */
2232 #define SF_TTY BIT(3) /* type == SSTDIN & it is a tty */
2233 #define SF_HASALIAS BIT(4) /* u.tblp valid (SALIAS, SEOF) */
2234 #define SF_MAYEXEC BIT(5) /* special sh -c optimisation hack */
2235
2236 typedef union {
2237 int i;
2238 char *cp;
2239 char **wp;
2240 struct op *o;
2241 struct ioword *iop;
2242 } YYSTYPE;
2243
2244 /* If something is added here, add it to tokentab[] in syn.c as well */
2245 #define LWORD 256
2246 #define LOGAND 257 /* && */
2247 #define LOGOR 258 /* || */
2248 #define BREAK 259 /* ;; */
2249 #define IF 260
2250 #define THEN 261
2251 #define ELSE 262
2252 #define ELIF 263
2253 #define FI 264
2254 #define CASE 265
2255 #define ESAC 266
2256 #define FOR 267
2257 #define SELECT 268
2258 #define WHILE 269
2259 #define UNTIL 270
2260 #define DO 271
2261 #define DONE 272
2262 #define IN 273
2263 #define FUNCTION 274
2264 #define TIME 275
2265 #define REDIR 276
2266 #define MDPAREN 277 /* (( )) */
2267 #define BANG 278 /* ! */
2268 #define DBRACKET 279 /* [[ .. ]] */
2269 #define COPROC 280 /* |& */
2270 #define BRKEV 281 /* ;| */
2271 #define BRKFT 282 /* ;& */
2272 #define YYERRCODE 300
2273
2274 /* flags to yylex */
2275 #define CONTIN BIT(0) /* skip new lines to complete command */
2276 #define ONEWORD BIT(1) /* single word for substitute() */
2277 #define ALIAS BIT(2) /* recognise alias */
2278 #define KEYWORD BIT(3) /* recognise keywords */
2279 #define LETEXPR BIT(4) /* get expression inside (( )) */
2280 #define CMDASN BIT(5) /* parse x[1 & 2] as one word, for typeset */
2281 #define HEREDOC BIT(6) /* parsing a here document body */
2282 #define ESACONLY BIT(7) /* only accept esac keyword */
2283 #define CMDWORD BIT(8) /* parsing simple command (alias related) */
2284 #define HEREDELIM BIT(9) /* parsing <<,<<- delimiter */
2285 #define LQCHAR BIT(10) /* source string contains QCHAR */
2286
2287 #define HERES 10 /* max number of << in line */
2288
2289 #ifdef MKSH_EBCDIC
2290 #define CTRL_AT (0x00U)
2291 #define CTRL_A (0x01U)
2292 #define CTRL_B (0x02U)
2293 #define CTRL_C (0x03U)
2294 #define CTRL_D (0x37U)
2295 #define CTRL_E (0x2DU)
2296 #define CTRL_F (0x2EU)
2297 #define CTRL_G (0x2FU)
2298 #define CTRL_H (0x16U)
2299 #define CTRL_I (0x05U)
2300 #define CTRL_J (0x15U)
2301 #define CTRL_K (0x0BU)
2302 #define CTRL_L (0x0CU)
2303 #define CTRL_M (0x0DU)
2304 #define CTRL_N (0x0EU)
2305 #define CTRL_O (0x0FU)
2306 #define CTRL_P (0x10U)
2307 #define CTRL_Q (0x11U)
2308 #define CTRL_R (0x12U)
2309 #define CTRL_S (0x13U)
2310 #define CTRL_T (0x3CU)
2311 #define CTRL_U (0x3DU)
2312 #define CTRL_V (0x32U)
2313 #define CTRL_W (0x26U)
2314 #define CTRL_X (0x18U)
2315 #define CTRL_Y (0x19U)
2316 #define CTRL_Z (0x3FU)
2317 #define CTRL_BO (0x27U)
2318 #define CTRL_BK (0x1CU)
2319 #define CTRL_BC (0x1DU)
2320 #define CTRL_CA (0x1EU)
2321 #define CTRL_US (0x1FU)
2322 #define CTRL_QM (0x07U)
2323 #else
2324 #define CTRL_AT (0x00U)
2325 #define CTRL_A (0x01U)
2326 #define CTRL_B (0x02U)
2327 #define CTRL_C (0x03U)
2328 #define CTRL_D (0x04U)
2329 #define CTRL_E (0x05U)
2330 #define CTRL_F (0x06U)
2331 #define CTRL_G (0x07U)
2332 #define CTRL_H (0x08U)
2333 #define CTRL_I (0x09U)
2334 #define CTRL_J (0x0AU)
2335 #define CTRL_K (0x0BU)
2336 #define CTRL_L (0x0CU)
2337 #define CTRL_M (0x0DU)
2338 #define CTRL_N (0x0EU)
2339 #define CTRL_O (0x0FU)
2340 #define CTRL_P (0x10U)
2341 #define CTRL_Q (0x11U)
2342 #define CTRL_R (0x12U)
2343 #define CTRL_S (0x13U)
2344 #define CTRL_T (0x14U)
2345 #define CTRL_U (0x15U)
2346 #define CTRL_V (0x16U)
2347 #define CTRL_W (0x17U)
2348 #define CTRL_X (0x18U)
2349 #define CTRL_Y (0x19U)
2350 #define CTRL_Z (0x1AU)
2351 #define CTRL_BO (0x1BU)
2352 #define CTRL_BK (0x1CU)
2353 #define CTRL_BC (0x1DU)
2354 #define CTRL_CA (0x1EU)
2355 #define CTRL_US (0x1FU)
2356 #define CTRL_QM (0x7FU)
2357 #endif
2358
2359 #define IDENT 64
2360
2361 EXTERN Source *source; /* yyparse/yylex source */
2362 EXTERN YYSTYPE yylval; /* result from yylex */
2363 EXTERN struct ioword *heres[HERES], **herep;
2364 EXTERN char ident[IDENT + 1];
2365
2366 EXTERN char **history; /* saved commands */
2367 EXTERN char **histptr; /* last history item */
2368 EXTERN mksh_ari_t histsize; /* history size */
2369
2370 /* flags to histsave */
2371 #define HIST_FLUSH 0
2372 #define HIST_QUEUE 1
2373 #define HIST_APPEND 2
2374 #define HIST_STORE 3
2375 #define HIST_NOTE 4
2376
2377 /* user and system time of last j_waitjed job */
2378 EXTERN struct timeval j_usrtime, j_systime;
2379
2380 #define notok2mul(max,val,c) (((val) != 0) && ((c) != 0) && \
2381 (((max) / (c)) < (val)))
2382 #define notok2add(max,val,c) ((val) > ((max) - (c)))
2383 #define notoktomul(val,cnst) notok2mul(SIZE_MAX, (val), (cnst))
2384 #define notoktoadd(val,cnst) notok2add(SIZE_MAX, (val), (cnst))
2385 #define checkoktoadd(val,cnst) do { \
2386 if (notoktoadd((val), (cnst))) \
2387 internal_errorf(Tintovfl, (size_t)(val), \
2388 '+', (size_t)(cnst)); \
2389 } while (/* CONSTCOND */ 0)
2390
2391
2392 /* lalloc.c */
2393 void ainit(Area *);
2394 void afreeall(Area *);
2395 /* these cannot fail and can take NULL (not for ap) */
2396 #define alloc(n,ap) aresize(NULL, (n), (ap))
2397 #define alloc2(m,n,ap) aresize2(NULL, (m), (n), (ap))
2398 void *aresize(void *, size_t, Area *);
2399 void *aresize2(void *, size_t, size_t, Area *);
2400 void afree(void *, Area *); /* can take NULL */
2401 #define aresizeif(z,p,n,ap) (((p) == NULL) || ((z) < (n)) || \
2402 (((z) & ~X_WASTE) > ((n) & ~X_WASTE)) ? \
2403 aresize((p), (n), (ap)) : (p))
2404 /* edit.c */
2405 #ifndef MKSH_NO_CMDLINE_EDITING
2406 int x_bind(const char * SMALLP(bool));
2407 int x_bind_check(void);
2408 int x_bind_list(void);
2409 int x_bind_showall(void);
2410 void x_init(void);
2411 #ifdef DEBUG_LEAKS
2412 void x_done(void);
2413 #endif
2414 int x_read(char *);
2415 #endif
2416 void x_mkraw(int, mksh_ttyst *, bool);
2417 void x_initterm(const char *);
2418 /* eval.c */
2419 char *substitute(const char *, int);
2420 char **eval(const char **, int);
2421 char *evalstr(const char *cp, int);
2422 char *evalonestr(const char *cp, int);
2423 char *debunk(char *, const char *, size_t);
2424 void expand(const char *, XPtrV *, int);
2425 int glob_str(char *, XPtrV *, bool);
2426 char *do_tilde(char *);
2427 /* exec.c */
2428 int execute(struct op * volatile, volatile int, volatile int * volatile);
2429 int c_builtin(const char **);
2430 struct tbl *get_builtin(const char *);
2431 struct tbl *findfunc(const char *, uint32_t, bool);
2432 int define(const char *, struct op *);
2433 const char *builtin(const char *, int (*)(const char **));
2434 struct tbl *findcom(const char *, int);
2435 void flushcom(bool);
2436 int search_access(const char *, int);
2437 const char *search_path(const char *, const char *, int, int *);
2438 void pr_menu(const char * const *);
2439 void pr_list(struct columnise_opts *, char * const *);
2440 int herein(struct ioword *, char **);
2441 /* expr.c */
2442 int evaluate(const char *, mksh_ari_t *, int, bool);
2443 int v_evaluate(struct tbl *, const char *, volatile int, bool);
2444 /* UTF-8 stuff */
2445 size_t utf_mbtowc(unsigned int *, const char *);
2446 size_t utf_wctomb(char *, unsigned int);
2447 int utf_widthadj(const char *, const char **);
2448 size_t utf_mbswidth(const char *) MKSH_A_PURE;
2449 const char *utf_skipcols(const char *, int, int *);
2450 size_t utf_ptradj(const char *) MKSH_A_PURE;
2451 #ifdef MIRBSD_BOOTFLOPPY
2452 #define utf_wcwidth(i) wcwidth((wchar_t)(i))
2453 #else
2454 int utf_wcwidth(unsigned int) MKSH_A_PURE;
2455 #endif
2456 int ksh_access(const char *, int);
2457 struct tbl *tempvar(const char *);
2458 /* funcs.c */
2459 int c_hash(const char **);
2460 int c_pwd(const char **);
2461 int c_print(const char **);
2462 #ifdef MKSH_PRINTF_BUILTIN
2463 int c_printf(const char **);
2464 #endif
2465 int c_whence(const char **);
2466 int c_command(const char **);
2467 int c_typeset(const char **);
2468 bool valid_alias_name(const char *);
2469 int c_alias(const char **);
2470 int c_unalias(const char **);
2471 int c_let(const char **);
2472 int c_jobs(const char **);
2473 #ifndef MKSH_UNEMPLOYED
2474 int c_fgbg(const char **);
2475 #endif
2476 int c_kill(const char **);
2477 void getopts_reset(int);
2478 int c_getopts(const char **);
2479 #ifndef MKSH_NO_CMDLINE_EDITING
2480 int c_bind(const char **);
2481 #endif
2482 int c_shift(const char **);
2483 int c_umask(const char **);
2484 int c_dot(const char **);
2485 int c_wait(const char **);
2486 int c_read(const char **);
2487 int c_eval(const char **);
2488 int c_trap(const char **);
2489 int c_brkcont(const char **);
2490 int c_exitreturn(const char **);
2491 int c_set(const char **);
2492 int c_unset(const char **);
2493 int c_ulimit(const char **);
2494 int c_times(const char **);
2495 int timex(struct op *, int, volatile int *);
2496 void timex_hook(struct op *, char ** volatile *);
2497 int c_exec(const char **);
2498 int c_test(const char **);
2499 #if HAVE_MKNOD
2500 int c_mknod(const char **);
2501 #endif
2502 int c_realpath(const char **);
2503 int c_rename(const char **);
2504 int c_cat(const char **);
2505 int c_sleep(const char **);
2506 /* histrap.c */
2507 void init_histvec(void);
2508 void hist_init(Source *);
2509 #if HAVE_PERSISTENT_HISTORY
2510 void hist_finish(void);
2511 #endif
2512 void histsave(int *, const char *, int, bool);
2513 #if !defined(MKSH_SMALL) && HAVE_PERSISTENT_HISTORY
2514 bool histsync(void);
2515 #endif
2516 int c_fc(const char **);
2517 void sethistsize(mksh_ari_t);
2518 #if HAVE_PERSISTENT_HISTORY
2519 void sethistfile(const char *);
2520 #endif
2521 #if !defined(MKSH_NO_CMDLINE_EDITING) && !MKSH_S_NOVI
2522 char **histpos(void) MKSH_A_PURE;
2523 int histnum(int);
2524 #endif
2525 int findhist(int, int, const char *, bool) MKSH_A_PURE;
2526 char **hist_get_newest(bool);
2527 void inittraps(void);
2528 void alarm_init(void);
2529 Trap *gettrap(const char *, bool, bool);
2530 void trapsig(int);
2531 void intrcheck(void);
2532 int fatal_trap_check(void);
2533 int trap_pending(void);
2534 void runtraps(int intr);
2535 void runtrap(Trap *, bool);
2536 void cleartraps(void);
2537 void restoresigs(void);
2538 void settrap(Trap *, const char *);
2539 bool block_pipe(void);
2540 void restore_pipe(void);
2541 int setsig(Trap *, sig_t, int);
2542 void setexecsig(Trap *, int);
2543 #if HAVE_FLOCK || HAVE_LOCK_FCNTL
2544 void mksh_lockfd(int);
2545 void mksh_unlkfd(int);
2546 #endif
2547 /* jobs.c */
2548 void j_init(void);
2549 void j_exit(void);
2550 #ifndef MKSH_UNEMPLOYED
2551 void j_change(void);
2552 #endif
2553 int exchild(struct op *, int, volatile int *, int);
2554 void startlast(void);
2555 int waitlast(void);
2556 int waitfor(const char *, int *);
2557 int j_kill(const char *, int);
2558 #ifndef MKSH_UNEMPLOYED
2559 int j_resume(const char *, int);
2560 #endif
2561 #if !defined(MKSH_UNEMPLOYED) && HAVE_GETSID
2562 void j_suspend(void);
2563 #endif
2564 int j_jobs(const char *, int, int);
2565 void j_notify(void);
2566 pid_t j_async(void);
2567 int j_stopped_running(void);
2568 /* lex.c */
2569 int yylex(int);
2570 void yyskiputf8bom(void);
2571 void yyerror(const char *, ...)
2572 MKSH_A_NORETURN
2573 MKSH_A_FORMAT(__printf__, 1, 2);
2574 Source *pushs(int, Area *);
2575 void set_prompt(int, Source *);
2576 int pprompt(const char *, int);
2577 /* main.c */
2578 int include(const char *, int, const char **, bool);
2579 int command(const char *, int);
2580 int shell(Source * volatile, volatile int);
2581 /* argument MUST NOT be 0 */
2582 void unwind(int) MKSH_A_NORETURN;
2583 void newenv(int);
2584 void quitenv(struct shf *);
2585 void cleanup_parents_env(void);
2586 void cleanup_proc_env(void);
2587 void errorf(const char *, ...)
2588 MKSH_A_NORETURN
2589 MKSH_A_FORMAT(__printf__, 1, 2);
2590 void errorfx(int, const char *, ...)
2591 MKSH_A_NORETURN
2592 MKSH_A_FORMAT(__printf__, 2, 3);
2593 void warningf(bool, const char *, ...)
2594 MKSH_A_FORMAT(__printf__, 2, 3);
2595 void bi_errorf(const char *, ...)
2596 MKSH_A_FORMAT(__printf__, 1, 2);
2597 void maybe_errorf(int *, int, const char *, ...)
2598 MKSH_A_FORMAT(__printf__, 3, 4);
2599 #define errorfz() errorf(NULL)
2600 #define errorfxz(rc) errorfx((rc), NULL)
2601 #define bi_errorfz() bi_errorf(NULL)
2602 void internal_errorf(const char *, ...)
2603 MKSH_A_NORETURN
2604 MKSH_A_FORMAT(__printf__, 1, 2);
2605 void internal_warningf(const char *, ...)
2606 MKSH_A_FORMAT(__printf__, 1, 2);
2607 void error_prefix(bool);
2608 void shellf(const char *, ...)
2609 MKSH_A_FORMAT(__printf__, 1, 2);
2610 void shprintf(const char *, ...)
2611 MKSH_A_FORMAT(__printf__, 1, 2);
2612 int can_seek(int);
2613 void initio(void);
2614 void recheck_ctype(void);
2615 int ksh_dup2(int, int, bool);
2616 short savefd(int);
2617 void restfd(int, int);
2618 void openpipe(int *);
2619 void closepipe(int *);
2620 int check_fd(const char *, int, const char **);
2621 void coproc_init(void);
2622 void coproc_read_close(int);
2623 void coproc_readw_close(int);
2624 void coproc_write_close(int);
2625 int coproc_getfd(int, const char **);
2626 void coproc_cleanup(int);
2627 struct temp *maketemp(Area *, Temp_type, struct temp **);
2628 void ktinit(Area *, struct table *, uint8_t);
2629 struct tbl *ktscan(struct table *, const char *, uint32_t, struct tbl ***);
2630 /* table, name (key) to search for, hash(n) */
2631 #define ktsearch(tp,s,h) ktscan((tp), (s), (h), NULL)
2632 struct tbl *ktenter(struct table *, const char *, uint32_t);
2633 #define ktdelete(p) do { p->flag = 0; } while (/* CONSTCOND */ 0)
2634 void ktwalk(struct tstate *, struct table *);
2635 struct tbl *ktnext(struct tstate *);
2636 struct tbl **ktsort(struct table *);
2637 #ifdef DF
2638 void DF(const char *, ...)
2639 MKSH_A_FORMAT(__printf__, 1, 2);
2640 #endif
2641 /* misc.c */
2642 size_t option(const char *) MKSH_A_PURE;
2643 char *getoptions(void);
2644 void change_flag(enum sh_flag, int, bool);
2645 void change_xtrace(unsigned char, bool);
2646 int parse_args(const char **, int, bool *);
2647 int getn(const char *, int *);
2648 int gmatchx(const char *, const char *, bool);
2649 bool has_globbing(const char *) MKSH_A_PURE;
2650 int ascstrcmp(const void *, const void *) MKSH_A_PURE;
2651 int ascpstrcmp(const void *, const void *) MKSH_A_PURE;
2652 void ksh_getopt_reset(Getopt *, int);
2653 int ksh_getopt(const char **, Getopt *, const char *);
2654 void print_value_quoted(struct shf *, const char *);
2655 char *quote_value(const char *);
2656 void print_columns(struct columnise_opts *, unsigned int,
2657 void (*)(char *, size_t, unsigned int, const void *),
2658 const void *, size_t, size_t);
2659 void strip_nuls(char *, size_t)
2660 MKSH_A_BOUNDED(__string__, 1, 2);
2661 ssize_t blocking_read(int, char *, size_t)
2662 MKSH_A_BOUNDED(__buffer__, 2, 3);
2663 int reset_nonblock(int);
2664 char *ksh_get_wd(void);
2665 char *do_realpath(const char *);
2666 void simplify_path(char *);
2667 void set_current_wd(const char *);
2668 int c_cd(const char **);
2669 #if defined(MKSH_SMALL) && !defined(MKSH_SMALL_BUT_FAST)
2670 char *strdup_i(const char *, Area *);
2671 char *strndup_i(const char *, size_t, Area *);
2672 #endif
2673 int unbksl(bool, int (*)(void), void (*)(int));
2674 #ifdef __OS2__
2675 /* os2.c */
2676 void os2_init(int *, const char ***);
2677 void setextlibpath(const char *, const char *);
2678 int access_ex(int (*)(const char *, int), const char *, int);
2679 int stat_ex(int (*)(const char *, struct stat *), const char *, struct stat *);
2680 const char *real_exec_name(const char *);
2681 #endif
2682 /* shf.c */
2683 struct shf *shf_open(const char *, int, int, int);
2684 struct shf *shf_fdopen(int, int, struct shf *);
2685 struct shf *shf_reopen(int, int, struct shf *);
2686 struct shf *shf_sopen(char *, ssize_t, int, struct shf *);
2687 int shf_close(struct shf *);
2688 int shf_fdclose(struct shf *);
2689 char *shf_sclose(struct shf *);
2690 int shf_flush(struct shf *);
2691 ssize_t shf_read(char *, ssize_t, struct shf *);
2692 char *shf_getse(char *, ssize_t, struct shf *);
2693 int shf_getchar(struct shf *s);
2694 int shf_ungetc(int, struct shf *);
2695 #ifdef MKSH_SHF_NO_INLINE
2696 int shf_getc(struct shf *);
2697 int shf_putc(int, struct shf *);
2698 #else
2699 #define shf_getc shf_getc_i
2700 #define shf_putc shf_putc_i
2701 #endif
2702 int shf_putchar(int, struct shf *);
2703 ssize_t shf_puts(const char *, struct shf *);
2704 ssize_t shf_write(const char *, ssize_t, struct shf *);
2705 ssize_t shf_fprintf(struct shf *, const char *, ...)
2706 MKSH_A_FORMAT(__printf__, 2, 3);
2707 ssize_t shf_snprintf(char *, ssize_t, const char *, ...)
2708 MKSH_A_FORMAT(__printf__, 3, 4)
2709 MKSH_A_BOUNDED(__string__, 1, 2);
2710 char *shf_smprintf(const char *, ...)
2711 MKSH_A_FORMAT(__printf__, 1, 2);
2712 ssize_t shf_vfprintf(struct shf *, const char *, va_list)
2713 MKSH_A_FORMAT(__printf__, 2, 0);
2714 void set_ifs(const char *);
2715 /* syn.c */
2716 void initkeywords(void);
2717 struct op *compile(Source *, bool, bool);
2718 bool parse_usec(const char *, struct timeval *);
2719 char *yyrecursive(int);
2720 void yyrecursive_pop(bool);
2721 /* tree.c */
2722 void fptreef(struct shf *, int, const char *, ...);
2723 char *snptreef(char *, ssize_t, const char *, ...);
2724 struct op *tcopy(struct op *, Area *);
2725 char *wdcopy(const char *, Area *);
2726 const char *wdscan(const char *, int);
2727 #define WDS_TPUTS BIT(0) /* tputS (dumpwdvar) mode */
2728 char *wdstrip(const char *, int);
2729 void tfree(struct op *, Area *);
2730 void dumpchar(struct shf *, unsigned char);
2731 void dumptree(struct shf *, struct op *);
2732 void dumpwdvar(struct shf *, const char *);
2733 void dumpioact(struct shf *shf, struct op *t);
2734 void vistree(char *, size_t, struct op *)
2735 MKSH_A_BOUNDED(__string__, 1, 2);
2736 void fpFUNCTf(struct shf *, int, bool, const char *, struct op *);
2737 /* var.c */
2738 void newblock(void);
2739 void popblock(void);
2740 void initvar(void);
2741 struct block *varsearch(struct block *, struct tbl **, const char *, uint32_t);
2742 struct tbl *global(const char *);
2743 struct tbl *isglobal(const char *, bool);
2744 struct tbl *local(const char *, bool);
2745 char *str_val(struct tbl *);
2746 int setstr(struct tbl *, const char *, int);
2747 struct tbl *setint_v(struct tbl *, struct tbl *, bool);
2748 void setint(struct tbl *, mksh_ari_t);
2749 void setint_n(struct tbl *, mksh_ari_t, int);
2750 struct tbl *typeset(const char *, uint32_t, uint32_t, int, int);
2751 void unset(struct tbl *, int);
2752 const char *skip_varname(const char *, bool) MKSH_A_PURE;
2753 const char *skip_wdvarname(const char *, bool) MKSH_A_PURE;
2754 int is_wdvarname(const char *, bool) MKSH_A_PURE;
2755 int is_wdvarassign(const char *) MKSH_A_PURE;
2756 struct tbl *arraysearch(struct tbl *, uint32_t);
2757 char **makenv(void);
2758 void change_winsz(void);
2759 size_t array_ref_len(const char *) MKSH_A_PURE;
2760 char *arrayname(const char *);
2761 mksh_uari_t set_array(const char *, bool, const char **);
2762 uint32_t hash(const void *) MKSH_A_PURE;
2763 uint32_t chvt_rndsetup(const void *, size_t) MKSH_A_PURE;
2764 mksh_ari_t rndget(void);
2765 void rndset(unsigned long);
2766 void rndpush(const void *);
2767 void record_match(const char *);
2768
2769 enum Test_op {
2770 /* non-operator */
2771 TO_NONOP = 0,
2772 /* unary operators */
2773 TO_STNZE, TO_STZER, TO_ISSET, TO_OPTION,
2774 TO_FILAXST,
2775 TO_FILEXST,
2776 TO_FILREG, TO_FILBDEV, TO_FILCDEV, TO_FILSYM, TO_FILFIFO, TO_FILSOCK,
2777 TO_FILCDF, TO_FILID, TO_FILGID, TO_FILSETG, TO_FILSTCK, TO_FILUID,
2778 TO_FILRD, TO_FILGZ, TO_FILTT, TO_FILSETU, TO_FILWR, TO_FILEX,
2779 /* binary operators */
2780 TO_STEQL, TO_STNEQ, TO_STLT, TO_STGT, TO_INTEQ, TO_INTNE, TO_INTGT,
2781 TO_INTGE, TO_INTLT, TO_INTLE, TO_FILEQ, TO_FILNT, TO_FILOT,
2782 /* not an operator */
2783 TO_NONNULL /* !TO_NONOP */
2784 };
2785 typedef enum Test_op Test_op;
2786
2787 /* Used by Test_env.isa() (order important - used to index *_tokens[] arrays) */
2788 enum Test_meta {
2789 TM_OR, /* -o or || */
2790 TM_AND, /* -a or && */
2791 TM_NOT, /* ! */
2792 TM_OPAREN, /* ( */
2793 TM_CPAREN, /* ) */
2794 TM_UNOP, /* unary operator */
2795 TM_BINOP, /* binary operator */
2796 TM_END /* end of input */
2797 };
2798 typedef enum Test_meta Test_meta;
2799
2800 struct t_op {
2801 const char op_text[4];
2802 Test_op op_num;
2803 };
2804
2805 /* for string reuse */
2806 extern const struct t_op u_ops[];
2807 extern const struct t_op b_ops[];
2808 /* ensure order with funcs.c */
2809 #define Tda (u_ops[0].op_text)
2810 #define Tdn (u_ops[12].op_text)
2811 #define Tdo (u_ops[14].op_text)
2812 #define Tdr (u_ops[16].op_text)
2813 #define Tdu (u_ops[20].op_text) /* "-u" */
2814 #define Tdx (u_ops[23].op_text)
2815
2816 #define Tu (Tdu + 1) /* "u" */
2817
2818 #define TEF_ERROR BIT(0) /* set if we've hit an error */
2819 #define TEF_DBRACKET BIT(1) /* set if [[ .. ]] test */
2820
2821 typedef struct test_env {
2822 union {
2823 const char **wp; /* used by ptest_* */
2824 XPtrV *av; /* used by dbtestp_* */
2825 } pos;
2826 const char **wp_end; /* used by ptest_* */
2827 Test_op (*isa)(struct test_env *, Test_meta);
2828 const char *(*getopnd) (struct test_env *, Test_op, bool);
2829 int (*eval)(struct test_env *, Test_op, const char *, const char *, bool);
2830 void (*error)(struct test_env *, int, const char *);
2831 int flags; /* TEF_* */
2832 } Test_env;
2833
2834 extern const char * const dbtest_tokens[];
2835
2836 Test_op test_isop(Test_meta, const char *) MKSH_A_PURE;
2837 int test_eval(Test_env *, Test_op, const char *, const char *, bool);
2838 int test_parse(Test_env *);
2839
2840 /* tty_fd is not opened O_BINARY, it's thus never read/written */
2841 EXTERN int tty_fd E_INIT(-1); /* dup'd tty file descriptor */
2842 EXTERN bool tty_devtty; /* true if tty_fd is from /dev/tty */
2843 EXTERN mksh_ttyst tty_state; /* saved tty state */
2844 EXTERN bool tty_hasstate; /* true if tty_state is valid */
2845
2846 extern int tty_init_fd(void); /* initialise tty_fd, tty_devtty */
2847
2848 #ifdef __OS2__
2849 #define binopen2(path,flags) __extension__({ \
2850 int binopen2_fd = open((path), (flags) | O_BINARY); \
2851 if (binopen2_fd >= 0) \
2852 setmode(binopen2_fd, O_BINARY); \
2853 (binopen2_fd); \
2854 })
2855 #define binopen3(path,flags,mode) __extension__({ \
2856 int binopen3_fd = open((path), (flags) | O_BINARY, (mode)); \
2857 if (binopen3_fd >= 0) \
2858 setmode(binopen3_fd, O_BINARY); \
2859 (binopen3_fd); \
2860 })
2861 #else
2862 #define binopen2(path,flags) open((path), (flags) | O_BINARY)
2863 #define binopen3(path,flags,mode) open((path), (flags) | O_BINARY, (mode))
2864 #endif
2865
2866 #ifdef MKSH_DOSPATH
2867 #define mksh_drvltr(s) __extension__({ \
2868 const char *mksh_drvltr_s = (s); \
2869 (ctype(mksh_drvltr_s[0], C_ALPHA) && mksh_drvltr_s[1] == ':'); \
2870 })
2871 #define mksh_abspath(s) __extension__({ \
2872 const char *mksh_abspath_s = (s); \
2873 (mksh_cdirsep(mksh_abspath_s[0]) || \
2874 (mksh_drvltr(mksh_abspath_s) && \
2875 mksh_cdirsep(mksh_abspath_s[2]))); \
2876 })
2877 #define mksh_cdirsep(c) __extension__({ \
2878 char mksh_cdirsep_c = (c); \
2879 (mksh_cdirsep_c == '/' || mksh_cdirsep_c == '\\'); \
2880 })
2881 #define mksh_sdirsep(s) strpbrk((s), "/\\")
2882 #define mksh_vdirsep(s) __extension__({ \
2883 const char *mksh_vdirsep_s = (s); \
2884 (((mksh_drvltr(mksh_vdirsep_s) && \
2885 !mksh_cdirsep(mksh_vdirsep_s[2])) ? (!0) : \
2886 (mksh_sdirsep(mksh_vdirsep_s) != NULL)) && \
2887 (strcmp(mksh_vdirsep_s, T_builtin) != 0)); \
2888 })
2889 int getdrvwd(char **, unsigned int);
2890 #else
2891 #define mksh_abspath(s) (ord((s)[0]) == ORD('/'))
2892 #define mksh_cdirsep(c) (ord(c) == ORD('/'))
2893 #define mksh_sdirsep(s) strchr((s), '/')
2894 #define mksh_vdirsep(s) vstrchr((s), '/')
2895 #endif
2896
2897 /* be sure not to interfere with anyone else's idea about EXTERN */
2898 #ifdef EXTERN_DEFINED
2899 # undef EXTERN_DEFINED
2900 # undef EXTERN
2901 #endif
2902 #undef E_INIT
2903
2904 #endif /* !MKSH_INCLUDES_ONLY */
2905