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 #ifndef MKSH_NOPWNAM
82 #include <pwd.h>
83 #endif
84 #include <setjmp.h>
85 #include <signal.h>
86 #include <stdarg.h>
87 #include <stddef.h>
88 #if HAVE_STDINT_H
89 #include <stdint.h>
90 #endif
91 #include <stdio.h>
92 #include <stdlib.h>
93 #include <string.h>
94 #if HAVE_STRINGS_H
95 #include <strings.h>
96 #endif
97 #if HAVE_TERMIOS_H
98 #include <termios.h>
99 #else
100 /* shudder… */
101 #include <termio.h>
102 #endif
103 #ifdef _ISC_UNIX
104 /* XXX imake style */
105 #include <sys/sioctl.h>
106 #endif
107 #if HAVE_ULIMIT_H
108 #include <ulimit.h>
109 #endif
110 #include <unistd.h>
111 #if HAVE_VALUES_H
112 #include <values.h>
113 #endif
114 #ifdef MIRBSD_BOOTFLOPPY
115 #include <wchar.h>
116 #endif
117
118 /* monkey-patch known-bad offsetof versions to quell a warning */
119 #if (defined(__KLIBC__) || defined(__dietlibc__)) && \
120 ((defined(__GNUC__) && (__GNUC__ > 3)) || defined(__NWCC__))
121 #undef offsetof
122 #define offsetof(s,e) __builtin_offsetof(s, e)
123 #endif
124
125 #undef __attribute__
126 #if HAVE_ATTRIBUTE_BOUNDED
127 #define MKSH_A_BOUNDED(x,y,z) __attribute__((__bounded__(x, y, z)))
128 #else
129 #define MKSH_A_BOUNDED(x,y,z) /* nothing */
130 #endif
131 #if HAVE_ATTRIBUTE_FORMAT
132 #define MKSH_A_FORMAT(x,y,z) __attribute__((__format__(x, y, z)))
133 #else
134 #define MKSH_A_FORMAT(x,y,z) /* nothing */
135 #endif
136 #if HAVE_ATTRIBUTE_NORETURN
137 #define MKSH_A_NORETURN __attribute__((__noreturn__))
138 #else
139 #define MKSH_A_NORETURN /* nothing */
140 #endif
141 #if HAVE_ATTRIBUTE_PURE
142 #define MKSH_A_PURE __attribute__((__pure__))
143 #else
144 #define MKSH_A_PURE /* nothing */
145 #endif
146 #if HAVE_ATTRIBUTE_UNUSED
147 #define MKSH_A_UNUSED __attribute__((__unused__))
148 #else
149 #define MKSH_A_UNUSED /* nothing */
150 #endif
151 #if HAVE_ATTRIBUTE_USED
152 #define MKSH_A_USED __attribute__((__used__))
153 #else
154 #define MKSH_A_USED /* nothing */
155 #endif
156
157 #if defined(MirBSD) && (MirBSD >= 0x09A1) && \
158 defined(__ELF__) && defined(__GNUC__) && \
159 !defined(__llvm__) && !defined(__NWCC__)
160 /*
161 * We got usable __IDSTRING __COPYRIGHT __RCSID __SCCSID macros
162 * which work for all cases; no need to redefine them using the
163 * "portable" macros from below when we might have the "better"
164 * gcc+ELF specific macros or other system dependent ones.
165 */
166 #else
167 #undef __IDSTRING
168 #undef __IDSTRING_CONCAT
169 #undef __IDSTRING_EXPAND
170 #undef __COPYRIGHT
171 #undef __RCSID
172 #undef __SCCSID
173 #define __IDSTRING_CONCAT(l,p) __LINTED__ ## l ## _ ## p
174 #define __IDSTRING_EXPAND(l,p) __IDSTRING_CONCAT(l,p)
175 #ifdef MKSH_DONT_EMIT_IDSTRING
176 #define __IDSTRING(prefix,string) /* nothing */
177 #elif defined(__ELF__) && defined(__GNUC__) && \
178 !(defined(__GNUC__) && defined(__mips16) && (__GNUC__ >= 8)) && \
179 !defined(__llvm__) && !defined(__NWCC__) && !defined(NO_ASM)
180 #define __IDSTRING(prefix,string) \
181 __asm__(".section .comment" \
182 "\n .ascii \"@(\"\"#)" #prefix ": \"" \
183 "\n .asciz \"" string "\"" \
184 "\n .previous")
185 #else
186 #define __IDSTRING(prefix,string) \
187 static const char __IDSTRING_EXPAND(__LINE__,prefix) [] \
188 MKSH_A_USED = "@(""#)" #prefix ": " string
189 #endif
190 #define __COPYRIGHT(x) __IDSTRING(copyright,x)
191 #define __RCSID(x) __IDSTRING(rcsid,x)
192 #define __SCCSID(x) __IDSTRING(sccsid,x)
193 #endif
194
195 #ifdef EXTERN
196 __RCSID("$MirOS: src/bin/mksh/sh.h,v 1.904 2020/10/31 03:53:06 tg Exp $");
197 #endif
198 #define MKSH_VERSION "R59 2020/10/31"
199
200 /* arithmetic types: C implementation */
201 #if !HAVE_CAN_INTTYPES
202 #if !HAVE_CAN_UCBINTS
203 typedef signed int int32_t;
204 typedef unsigned int uint32_t;
205 #else
206 typedef u_int32_t uint32_t;
207 #endif
208 #endif
209
210 /* arithmetic types: shell arithmetics */
211 #ifdef MKSH_LEGACY_MODE
212 /*
213 * POSIX demands these to be the C environment's long type
214 */
215 typedef long mksh_ari_t;
216 typedef unsigned long mksh_uari_t;
217 #else
218 /*
219 * These types are exactly 32 bit wide; signed and unsigned
220 * integer wraparound, even across division and modulo, for
221 * any shell code using them, is guaranteed.
222 */
223 typedef int32_t mksh_ari_t;
224 typedef uint32_t mksh_uari_t;
225 #endif
226
227 /* boolean type (no <stdbool.h> deliberately) */
228 typedef unsigned char mksh_bool;
229 #undef bool
230 /* false MUST equal the same 0 as written by static storage initialisation */
231 #undef false
232 #undef true
233 /* access macros for boolean type */
234 #define bool mksh_bool
235 /* values must have identity mapping between mksh_bool and short */
236 #define false 0
237 #define true 1
238 /* make any-type into bool or short */
239 #define tobool(cond) ((cond) ? true : false)
240
241 /* char (octet) type: C implementation */
242 #if !HAVE_CAN_INT8TYPE
243 #if !HAVE_CAN_UCBINT8
244 typedef unsigned char uint8_t;
245 #else
246 typedef u_int8_t uint8_t;
247 #endif
248 #endif
249
250 /* other standard types */
251
252 #if !HAVE_SIG_T
253 #undef sig_t
254 typedef void (*sig_t)(int);
255 #endif
256
257 #ifdef MKSH_TYPEDEF_SIG_ATOMIC_T
258 typedef MKSH_TYPEDEF_SIG_ATOMIC_T sig_atomic_t;
259 #endif
260
261 #ifdef MKSH_TYPEDEF_SSIZE_T
262 typedef MKSH_TYPEDEF_SSIZE_T ssize_t;
263 #endif
264
265 #if defined(MKSH_SMALL) && !defined(MKSH_SMALL_BUT_FAST)
266 #define MKSH_SHF_NO_INLINE
267 #endif
268
269 /* do not merge these conditionals as neatcc’s preprocessor is simple */
270 #ifdef __neatcc__
271 /* parsing of comma operator <,> in expressions broken */
272 #define MKSH_SHF_NO_INLINE
273 #endif
274
275 /* un-do vendor damage */
276
277 #undef BAD /* AIX defines that somewhere */
278 #undef PRINT /* LynxOS defines that somewhere */
279 #undef flock /* SCO UnixWare defines that to flock64 but ENOENT */
280
281
282 #ifndef MKSH_INCLUDES_ONLY
283
284 /* compile-time assertions */
285 #define cta(name,expr) struct cta_ ## name { char t[(expr) ? 1 : -1]; }
286
287 /* EBCDIC fun */
288
289 /* see the large comment in shf.c for an EBCDIC primer */
290
291 #if defined(MKSH_FOR_Z_OS) && defined(__MVS__) && defined(__IBMC__) && defined(__CHARSET_LIB)
292 # if !__CHARSET_LIB && !defined(MKSH_EBCDIC)
293 # error "Please compile with Build.sh -E for EBCDIC!"
294 # endif
295 # if __CHARSET_LIB && defined(MKSH_EBCDIC)
296 # error "Please compile without -E argument to Build.sh for ASCII!"
297 # endif
298 # if __CHARSET_LIB && !defined(_ENHANCED_ASCII_EXT)
299 /* go all-out on ASCII */
300 # define _ENHANCED_ASCII_EXT 0xFFFFFFFF
301 # endif
302 #endif
303
304 /* extra types */
305
306 /* getrusage does not exist on OS/2 kLIBC */
307 #if !HAVE_GETRUSAGE && !defined(__OS2__)
308 #undef rusage
309 #undef RUSAGE_SELF
310 #undef RUSAGE_CHILDREN
311 #define rusage mksh_rusage
312 #define RUSAGE_SELF 0
313 #define RUSAGE_CHILDREN -1
314
315 struct rusage {
316 struct timeval ru_utime;
317 struct timeval ru_stime;
318 };
319 #endif
320
321 /* extra macros */
322
323 #ifndef timerclear
324 #define timerclear(tvp) \
325 do { \
326 (tvp)->tv_sec = (tvp)->tv_usec = 0; \
327 } while (/* CONSTCOND */ 0)
328 #endif
329 #ifndef timeradd
330 #define timeradd(tvp,uvp,vvp) \
331 do { \
332 (vvp)->tv_sec = (tvp)->tv_sec + (uvp)->tv_sec; \
333 (vvp)->tv_usec = (tvp)->tv_usec + (uvp)->tv_usec; \
334 if ((vvp)->tv_usec >= 1000000) { \
335 (vvp)->tv_sec++; \
336 (vvp)->tv_usec -= 1000000; \
337 } \
338 } while (/* CONSTCOND */ 0)
339 #endif
340 #ifndef timersub
341 #define timersub(tvp,uvp,vvp) \
342 do { \
343 (vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec; \
344 (vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec; \
345 if ((vvp)->tv_usec < 0) { \
346 (vvp)->tv_sec--; \
347 (vvp)->tv_usec += 1000000; \
348 } \
349 } while (/* CONSTCOND */ 0)
350 #endif
351
352 #ifdef MKSH__NO_PATH_MAX
353 #undef PATH_MAX
354 #else
355 #ifndef PATH_MAX
356 #ifdef MAXPATHLEN
357 #define PATH_MAX MAXPATHLEN
358 #else
359 #define PATH_MAX 1024
360 #endif
361 #endif
362 #endif
363 #ifndef SIZE_MAX
364 #ifdef SIZE_T_MAX
365 #define SIZE_MAX SIZE_T_MAX
366 #else
367 #define SIZE_MAX ((size_t)-1)
368 #endif
369 #endif
370 #ifndef S_ISLNK
371 #define S_ISLNK(m) ((m & 0170000) == 0120000)
372 #endif
373 #ifndef S_ISSOCK
374 #define S_ISSOCK(m) ((m & 0170000) == 0140000)
375 #endif
376 #if !defined(S_ISCDF) && defined(S_CDF)
377 #define S_ISCDF(m) (S_ISDIR(m) && ((m) & S_CDF))
378 #endif
379 #ifndef DEFFILEMODE
380 #define DEFFILEMODE (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
381 #endif
382
383
384 /* determine ksh_NSIG: first, use the traditional definitions */
385 #undef ksh_NSIG
386 #if defined(NSIG)
387 #define ksh_NSIG (NSIG)
388 #elif defined(_NSIG)
389 #define ksh_NSIG (_NSIG)
390 #elif defined(SIGMAX)
391 #define ksh_NSIG (SIGMAX + 1)
392 #elif defined(_SIGMAX)
393 #define ksh_NSIG (_SIGMAX + 1)
394 #elif defined(NSIG_MAX)
395 #define ksh_NSIG (NSIG_MAX)
396 #elif defined(MKSH_FOR_Z_OS)
397 #define ksh_NSIG 40
398 #else
399 # error Please have your platform define NSIG.
400 #endif
401 /* range-check them */
402 #if (ksh_NSIG < 1)
403 # error Your NSIG value is not positive.
404 #undef ksh_NSIG
405 #endif
406 /* second, see if the new POSIX definition is available */
407 #ifdef NSIG_MAX
408 #if (NSIG_MAX < 2)
409 /* and usable */
410 # error Your NSIG_MAX value is too small.
411 #undef NSIG_MAX
412 #elif (ksh_NSIG > NSIG_MAX)
413 /* and realistic */
414 # error Your NSIG value is larger than your NSIG_MAX value.
415 #undef NSIG_MAX
416 #else
417 /* since it’s usable, prefer it */
418 #undef ksh_NSIG
419 #define ksh_NSIG (NSIG_MAX)
420 #endif
421 /* if NSIG_MAX is now still defined, use sysconf(_SC_NSIG) at runtime */
422 #endif
423 /* third, for cpp without the error directive, default */
424 #ifndef ksh_NSIG
425 #define ksh_NSIG 64
426 #endif
427
428 #define ksh_sigmask(sig) (((sig) < 1 || (sig) > 127) ? 255 : 128 + (sig))
429
430
431 /* OS-dependent additions (functions, variables, by OS) */
432
433 #ifdef MKSH_EXE_EXT
434 #undef MKSH_EXE_EXT
435 #define MKSH_EXE_EXT ".exe"
436 #else
437 #define MKSH_EXE_EXT ""
438 #endif
439
440 #ifdef __OS2__
441 #define MKSH_UNIXROOT "/@unixroot"
442 #else
443 #define MKSH_UNIXROOT ""
444 #endif
445
446 #ifdef MKSH_DOSPATH
447 #ifndef __GNUC__
448 # error GCC extensions needed later on
449 #endif
450 #define MKSH_PATHSEPS ";"
451 #define MKSH_PATHSEPC ';'
452 #else
453 #define MKSH_PATHSEPS ":"
454 #define MKSH_PATHSEPC ':'
455 #endif
456
457 #if !HAVE_FLOCK_DECL
458 extern int flock(int, int);
459 #endif
460
461 #if !HAVE_GETTIMEOFDAY
462 #define mksh_TIME(tv) do { \
463 (tv).tv_usec = 0; \
464 (tv).tv_sec = time(NULL); \
465 } while (/* CONSTCOND */ 0)
466 #else
467 #define mksh_TIME(tv) gettimeofday(&(tv), NULL)
468 #endif
469
470 #if !HAVE_GETRUSAGE
471 extern int getrusage(int, struct rusage *);
472 #endif
473
474 #if !HAVE_MEMMOVE
475 /* we assume either memmove or bcopy exist, at the moment */
476 #define memmove(dst,src,len) bcopy((src), (dst), (len))
477 #endif
478
479 #if !HAVE_REVOKE_DECL
480 extern int revoke(const char *);
481 #endif
482
483 #if defined(DEBUG) || !HAVE_STRERROR
484 #undef strerror
485 #define strerror /* poisoned */ dontuse_strerror
486 #define cstrerror /* replaced */ cstrerror
487 extern const char *cstrerror(int);
488 #else
489 #define cstrerror(errnum) ((const char *)strerror(errnum))
490 #endif
491
492 #if !HAVE_STRLCPY
493 size_t strlcpy(char *, const char *, size_t);
494 #endif
495
496 #ifdef __INTERIX
497 /* XXX imake style */
498 #define makedev mkdev
499 extern int __cdecl seteuid(uid_t);
500 extern int __cdecl setegid(gid_t);
501 #endif
502
503 #if defined(__COHERENT__)
504 #ifndef O_ACCMODE
505 /* this need not work everywhere, take care */
506 #define O_ACCMODE (O_RDONLY | O_WRONLY | O_RDWR)
507 #endif
508 #endif
509
510 #ifndef O_BINARY
511 #define O_BINARY 0
512 #endif
513
514 #undef O_MAYEXEC /* https://lwn.net/Articles/820658/ */
515 #define O_MAYEXEC 0
516
517 #ifdef MKSH__NO_SYMLINK
518 #undef S_ISLNK
519 #define S_ISLNK(m) (/* CONSTCOND */ 0)
520 #define mksh_lstat stat
521 #else
522 #define mksh_lstat lstat
523 #endif
524
525 #if HAVE_TERMIOS_H
526 #define mksh_ttyst struct termios
527 #define mksh_tcget(fd,st) tcgetattr((fd), (st))
528 #define mksh_tcset(fd,st) tcsetattr((fd), TCSADRAIN, (st))
529 #else
530 #define mksh_ttyst struct termio
531 #define mksh_tcget(fd,st) ioctl((fd), TCGETA, (st))
532 #define mksh_tcset(fd,st) ioctl((fd), TCSETAW, (st))
533 #endif
534
535 #ifndef ISTRIP
536 #define ISTRIP 0
537 #endif
538
539 #ifdef MKSH_EBCDIC
540 #define KSH_BEL '\a'
541 #define KSH_ESC 047
542 #define KSH_ESC_STRING "\047"
543 #define KSH_VTAB '\v'
544 #else
545 /*
546 * According to the comments in pdksh, \007 seems to be more portable
547 * than \a (HP-UX cc, Ultrix cc, old pcc, etc.) so we avoid the escape
548 * sequence if ASCII can be assumed.
549 */
550 #define KSH_BEL 7
551 #define KSH_ESC 033
552 #define KSH_ESC_STRING "\033"
553 #define KSH_VTAB 11
554 #endif
555
556
557 /* some useful #defines */
558 #ifdef EXTERN
559 # define E_INIT(i) = i
560 #else
561 # define E_INIT(i)
562 # define EXTERN extern
563 # define EXTERN_DEFINED
564 #endif
565
566 /* define bit in flag */
567 #define BIT(i) (1U << (i))
568 #define NELEM(a) (sizeof(a) / sizeof((a)[0]))
569
570 /*
571 * Make MAGIC a char that might be printed to make bugs more obvious, but
572 * not a char that is used often. Also, can't use the high bit as it causes
573 * portability problems (calling strchr(x, 0x80 | 'x') is error prone).
574 *
575 * MAGIC can be followed by MAGIC (to escape the octet itself) or one of:
576 * ' !)*,-?[]{|}' 0x80|' !*+?@' (probably… hysteric raisins abound)
577 *
578 * The |0x80 is likely unsafe on EBCDIC :( though the listed chars are
579 * low-bit7 at least on cp1047 so YMMV
580 */
581 #define MAGIC KSH_BEL /* prefix for *?[!{,} during expand */
582 #define ISMAGIC(c) (ord(c) == ORD(MAGIC))
583
584 EXTERN const char *safe_prompt; /* safe prompt if PS1 substitution fails */
585
586 #ifdef MKSH_LEGACY_MODE
587 #define KSH_VERSIONNAME_ISLEGACY "LEGACY"
588 #else
589 #define KSH_VERSIONNAME_ISLEGACY "MIRBSD"
590 #endif
591 #ifdef MKSH_WITH_TEXTMODE
592 #define KSH_VERSIONNAME_TEXTMODE " +TEXTMODE"
593 #else
594 #define KSH_VERSIONNAME_TEXTMODE ""
595 #endif
596 #ifdef MKSH_EBCDIC
597 #define KSH_VERSIONNAME_EBCDIC " +EBCDIC"
598 #else
599 #define KSH_VERSIONNAME_EBCDIC ""
600 #endif
601 #ifndef KSH_VERSIONNAME_VENDOR_EXT
602 #define KSH_VERSIONNAME_VENDOR_EXT ""
603 #endif
604 EXTERN const char initvsn[] E_INIT("KSH_VERSION=@(#)" KSH_VERSIONNAME_ISLEGACY \
605 " KSH " MKSH_VERSION KSH_VERSIONNAME_EBCDIC KSH_VERSIONNAME_TEXTMODE \
606 KSH_VERSIONNAME_VENDOR_EXT);
607 #define KSH_VERSION (initvsn + /* "KSH_VERSION=@(#)" */ 16)
608
609 EXTERN const char digits_uc[] E_INIT("0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ");
610 EXTERN const char digits_lc[] E_INIT("0123456789abcdefghijklmnopqrstuvwxyz");
611
612 /*
613 * Evil hack for const correctness due to API brokenness
614 */
615 union mksh_cchack {
616 char *rw;
617 const char *ro;
618 };
619 union mksh_ccphack {
620 char **rw;
621 const char **ro;
622 };
623
624 /*
625 * Evil hack since casting uint to sint is implementation-defined
626 */
627 typedef union {
628 mksh_ari_t i;
629 mksh_uari_t u;
630 } mksh_ari_u;
631
632 /* for const debugging */
633 #if defined(DEBUG) && defined(__GNUC__) && !defined(__ICC) && \
634 !defined(__INTEL_COMPILER) && !defined(__SUNPRO_C)
635 char *ucstrchr(char *, int);
636 char *ucstrstr(char *, const char *);
637 #undef strchr
638 #define strchr ucstrchr
639 #define strstr ucstrstr
640 #define cstrchr(s,c) ({ \
641 union mksh_cchack in, out; \
642 \
643 in.ro = (s); \
644 out.rw = ucstrchr(in.rw, (c)); \
645 (out.ro); \
646 })
647 #define cstrstr(b,l) ({ \
648 union mksh_cchack in, out; \
649 \
650 in.ro = (b); \
651 out.rw = ucstrstr(in.rw, (l)); \
652 (out.ro); \
653 })
654 #define vstrchr(s,c) (cstrchr((s), (c)) != NULL)
655 #define vstrstr(b,l) (cstrstr((b), (l)) != NULL)
656 #else /* !DEBUG, !gcc */
657 #define cstrchr(s,c) ((const char *)strchr((s), (c)))
658 #define cstrstr(s,c) ((const char *)strstr((s), (c)))
659 #define vstrchr(s,c) (strchr((s), (c)) != NULL)
660 #define vstrstr(b,l) (strstr((b), (l)) != NULL)
661 #endif
662
663 #if defined(DEBUG) || defined(__COVERITY__)
664 #ifndef DEBUG_LEAKS
665 #define DEBUG_LEAKS
666 #endif
667 #endif
668
669 #if (!defined(MKSH_BUILDMAKEFILE4BSD) && !defined(MKSH_BUILDSH)) || (MKSH_BUILD_R != 593)
670 #error Must run Build.sh to compile this.
671 extern void thiswillneverbedefinedIhope(void);
672 int
im_sorry_dave(void)673 im_sorry_dave(void)
674 {
675 /* I’m sorry, Dave. I’m afraid I can’t do that. */
676 return (thiswillneverbedefinedIhope());
677 }
678 #endif
679
680 /* use this ipv strchr(s, 0) but no side effects in s! */
681 #define strnul(s) ((s) + strlen((const void *)s))
682
683 #define utf_ptradjx(src,dst) do { \
684 (dst) = (src) + utf_ptradj(src); \
685 } while (/* CONSTCOND */ 0)
686
687 #if defined(MKSH_SMALL) && !defined(MKSH_SMALL_BUT_FAST)
688 #define strdupx(d,s,ap) do { \
689 (d) = strdup_i((s), (ap)); \
690 } while (/* CONSTCOND */ 0)
691 #define strndupx(d,s,n,ap) do { \
692 (d) = strndup_i((s), (n), (ap)); \
693 } while (/* CONSTCOND */ 0)
694 #else
695 /* be careful to evaluate arguments only once! */
696 #define strdupx(d,s,ap) do { \
697 const char *strdup_src = (const void *)(s); \
698 char *strdup_dst = NULL; \
699 \
700 if (strdup_src != NULL) { \
701 size_t strdup_len = strlen(strdup_src) + 1; \
702 strdup_dst = alloc(strdup_len, (ap)); \
703 memcpy(strdup_dst, strdup_src, strdup_len); \
704 } \
705 (d) = strdup_dst; \
706 } while (/* CONSTCOND */ 0)
707 #define strndupx(d,s,n,ap) do { \
708 const char *strdup_src = (const void *)(s); \
709 char *strdup_dst = NULL; \
710 \
711 if (strdup_src != NULL) { \
712 size_t strndup_len = (n); \
713 strdup_dst = alloc(strndup_len + 1, (ap)); \
714 memcpy(strdup_dst, strdup_src, strndup_len); \
715 strdup_dst[strndup_len] = '\0'; \
716 } \
717 (d) = strdup_dst; \
718 } while (/* CONSTCOND */ 0)
719 #endif
720 #define strdup2x(d,s1,s2) do { \
721 const char *strdup_src = (const void *)(s1); \
722 const char *strdup_app = (const void *)(s2); \
723 size_t strndup_len = strlen(strdup_src); \
724 size_t strndup_ln2 = strlen(strdup_app) + 1; \
725 char *strdup_dst = alloc(strndup_len + strndup_ln2, ATEMP); \
726 \
727 memcpy(strdup_dst, strdup_src, strndup_len); \
728 memcpy(strdup_dst + strndup_len, strdup_app, strndup_ln2); \
729 (d) = strdup_dst; \
730 } while (/* CONSTCOND */ 0)
731 #define strpathx(d,s1,s2,cond) do { \
732 const char *strdup_src = (const void *)(s1); \
733 const char *strdup_app = (const void *)(s2); \
734 size_t strndup_len = strlen(strdup_src) + 1; \
735 size_t strndup_ln2 = ((cond) || *strdup_app) ? \
736 strlen(strdup_app) + 1 : 0; \
737 char *strdup_dst = alloc(strndup_len + strndup_ln2, ATEMP); \
738 \
739 memcpy(strdup_dst, strdup_src, strndup_len); \
740 if (strndup_ln2) { \
741 strdup_dst[strndup_len - 1] = '/'; \
742 memcpy(strdup_dst + strndup_len, strdup_app, \
743 strndup_ln2); \
744 } \
745 (d) = strdup_dst; \
746 } while (/* CONSTCOND */ 0)
747
748 #ifdef MKSH_SMALL
749 #ifndef MKSH_NOPWNAM
750 #define MKSH_NOPWNAM /* defined */
751 #endif
752 #ifndef MKSH_S_NOVI
753 #define MKSH_S_NOVI 1
754 #endif
755 #endif
756
757 #ifndef MKSH_S_NOVI
758 #define MKSH_S_NOVI 0
759 #endif
760
761 #if defined(MKSH_NOPROSPECTOFWORK) && !defined(MKSH_UNEMPLOYED)
762 #define MKSH_UNEMPLOYED 1
763 #endif
764
765 #define NUFILE 32 /* Number of user-accessible files */
766 #define FDBASE 10 /* First file usable by Shell */
767
768 /*
769 * simple grouping allocator
770 */
771
772
773 /* 0. OS API: where to get memory from and how to free it (grouped) */
774
775 /* malloc(3)/realloc(3) -> free(3) for use by the memory allocator */
776 #define malloc_osi(sz) malloc(sz)
777 #define realloc_osi(p,sz) realloc((p), (sz))
778 #define free_osimalloc(p) free(p)
779
780 /* malloc(3)/realloc(3) -> free(3) for use by mksh code */
781 #define malloc_osfunc(sz) malloc(sz)
782 #define realloc_osfunc(p,sz) realloc((p), (sz))
783 #define free_osfunc(p) free(p)
784
785 #if HAVE_MKNOD
786 /* setmode(3) -> free(3) */
787 #define free_ossetmode(p) free(p)
788 #endif
789
790 #ifdef MKSH__NO_PATH_MAX
791 /* GNU libc: get_current_dir_name(3) -> free(3) */
792 #define free_gnu_gcdn(p) free(p)
793 #endif
794
795
796 /* 1. internal structure */
797 struct lalloc_common {
798 struct lalloc_common *next;
799 };
800
801 #ifdef MKSH_ALLOC_CATCH_UNDERRUNS
802 struct lalloc_item {
803 struct lalloc_common *next;
804 size_t len;
805 char dummy[8192 - sizeof(struct lalloc_common *) - sizeof(size_t)];
806 };
807 #endif
808
809 /* 2. sizes */
810 #ifdef MKSH_ALLOC_CATCH_UNDERRUNS
811 #define ALLOC_ITEM struct lalloc_item
812 #define ALLOC_OVERHEAD 0
813 #else
814 #define ALLOC_ITEM struct lalloc_common
815 #define ALLOC_OVERHEAD (sizeof(ALLOC_ITEM))
816 #endif
817
818 /* 3. group structure */
819 typedef struct lalloc_common Area;
820
821
822 EXTERN Area aperm; /* permanent object space */
823 #define APERM &aperm
824 #define ATEMP &e->area
825
826 /*
827 * flags (the order of these enums MUST match the order in misc.c(options[]))
828 */
829 enum sh_flag {
830 #define SHFLAGS_ENUMS
831 #include "sh_flags.gen"
832 FNFLAGS /* (place holder: how many flags are there) */
833 };
834
835 #define Flag(f) (shell_flags[(int)(f)])
836 #define UTFMODE Flag(FUNNYCODE)
837
838 /*
839 * parsing & execution environment
840 *
841 * note that kshlongjmp MUST NOT be passed 0 as second argument!
842 */
843 #ifdef MKSH_NO_SIGSETJMP
844 #define kshjmp_buf jmp_buf
845 #define kshsetjmp(jbuf) _setjmp(jbuf)
846 #define kshlongjmp _longjmp
847 #else
848 #define kshjmp_buf sigjmp_buf
849 #define kshsetjmp(jbuf) sigsetjmp((jbuf), 0)
850 #define kshlongjmp siglongjmp
851 #endif
852
853 struct sretrace_info;
854 struct yyrecursive_state;
855
856 EXTERN struct sretrace_info *retrace_info;
857 EXTERN unsigned int subshell_nesting_type;
858
859 extern struct env {
860 ALLOC_ITEM alloc_INT; /* internal, do not touch */
861 Area area; /* temporary allocation area */
862 struct env *oenv; /* link to previous environment */
863 struct block *loc; /* local variables and functions */
864 short *savefd; /* original redirected fds */
865 struct temp *temps; /* temp files */
866 /* saved parser recursion state */
867 struct yyrecursive_state *yyrecursive_statep;
868 kshjmp_buf jbuf; /* long jump back to env creator */
869 uint8_t type; /* environment type - see below */
870 uint8_t flags; /* EF_* */
871 } *e;
872
873 /* struct env.type values */
874 #define E_NONE 0 /* dummy environment */
875 #define E_PARSE 1 /* parsing command # */
876 #define E_FUNC 2 /* executing function # */
877 #define E_INCL 3 /* including a file via . # */
878 #define E_EXEC 4 /* executing command tree */
879 #define E_LOOP 5 /* executing for/while # */
880 #define E_ERRH 6 /* general error handler # */
881 #define E_GONE 7 /* hidden in child */
882 #define E_EVAL 8 /* running eval # */
883 /* # indicates env has valid jbuf (see unwind()) */
884
885 /* struct env.flag values */
886 #define EF_BRKCONT_PASS BIT(1) /* set if E_LOOP must pass break/continue on */
887 #define EF_FAKE_SIGDIE BIT(2) /* hack to get info from unwind to quitenv */
888 #define EF_IN_EVAL BIT(3) /* inside an eval */
889
890 /* Do breaks/continues stop at env type e? */
891 #define STOP_BRKCONT(t) ((t) == E_NONE || (t) == E_PARSE || \
892 (t) == E_FUNC || (t) == E_INCL)
893 /* Do returns stop at env type e? */
894 #define STOP_RETURN(t) ((t) == E_FUNC || (t) == E_INCL)
895
896 /* values for kshlongjmp(e->jbuf, i) */
897 /* note that i MUST NOT be zero */
898 #define LRETURN 1 /* return statement */
899 #define LEXIT 2 /* exit statement */
900 #define LERROR 3 /* errorf() called */
901 #define LERREXT 4 /* set -e caused */
902 #define LINTR 5 /* ^C noticed */
903 #define LBREAK 6 /* break statement */
904 #define LCONTIN 7 /* continue statement */
905 #define LSHELL 8 /* return to interactive shell() */
906 #define LAEXPR 9 /* error in arithmetic expression */
907 #define LLEAVE 10 /* untrappable exit/error */
908
909 /* sort of shell global state */
910 EXTERN pid_t procpid; /* PID of executing process */
911 EXTERN int exstat; /* exit status */
912 EXTERN int subst_exstat; /* exit status of last $(..)/`..` */
913 EXTERN struct tbl *vp_pipest; /* global PIPESTATUS array */
914 EXTERN short trap_exstat; /* exit status before running a trap */
915 EXTERN uint8_t trap_nested; /* running nested traps */
916 EXTERN uint8_t shell_flags[FNFLAGS];
917 EXTERN uint8_t baseline_flags[FNFLAGS
918 #if !defined(MKSH_SMALL) || defined(DEBUG)
919 + 1
920 #endif
921 ];
922 EXTERN bool as_builtin; /* direct builtin call */
923 EXTERN const char *kshname; /* $0 */
924 EXTERN struct {
925 uid_t kshuid_v; /* real UID of shell at startup */
926 uid_t ksheuid_v; /* effective UID of shell */
927 gid_t kshgid_v; /* real GID of shell at startup */
928 gid_t kshegid_v; /* effective GID of shell */
929 pid_t kshpgrp_v; /* process group of shell */
930 pid_t kshppid_v; /* PID of parent of shell */
931 pid_t kshpid_v; /* $$, shell PID */
932 } rndsetupstate;
933
934 #define kshpid rndsetupstate.kshpid_v
935 #define kshpgrp rndsetupstate.kshpgrp_v
936 #define kshuid rndsetupstate.kshuid_v
937 #define ksheuid rndsetupstate.ksheuid_v
938 #define kshgid rndsetupstate.kshgid_v
939 #define kshegid rndsetupstate.kshegid_v
940 #define kshppid rndsetupstate.kshppid_v
941
942
943 /* option processing */
944 #define OF_CMDLINE 0x01 /* command line */
945 #define OF_SET 0x02 /* set builtin */
946 #define OF_SPECIAL 0x04 /* a special variable changing */
947 #define OF_INTERNAL 0x08 /* set internally by shell */
948 #define OF_FIRSTTIME 0x10 /* as early as possible, once */
949 #define OF_ANY (OF_CMDLINE | OF_SET | OF_SPECIAL | OF_INTERNAL)
950
951 /* null value for variable; comparison pointer for unset */
952 EXTERN char null[] E_INIT("");
953
954 /* string pooling: do we rely on the compiler? */
955 #ifndef HAVE_STRING_POOLING
956 /* no, we use our own, saves quite some space */
957 #elif HAVE_STRING_POOLING == 2
958 /* “on demand” */
959 #ifdef __GNUC__
960 /* only for GCC 4 or later, older ones can get by without */
961 #if __GNUC__ < 4
962 #undef HAVE_STRING_POOLING
963 #endif
964 #else
965 /* not GCC, default to on */
966 #endif
967 #elif HAVE_STRING_POOLING == 0
968 /* default to on, unless explicitly set to 0 */
969 #undef HAVE_STRING_POOLING
970 #endif
971
972 #ifndef HAVE_STRING_POOLING /* helpers for pooled strings */
973 EXTERN const char T4spaces[] E_INIT(" ");
974 #define T1space (Treal_sp2 + 5)
975 #define Tcolsp (Tf_sD_ + 2)
976 #define TC_IFSWS (TinitIFS + 4)
977 EXTERN const char TinitIFS[] E_INIT("IFS= \t\n");
978 EXTERN const char TFCEDIT_dollaru[] E_INIT("${FCEDIT:-/bin/ed} $_");
979 #define Tspdollaru (TFCEDIT_dollaru + 18)
980 EXTERN const char Tsgdot[] E_INIT("*=.");
981 EXTERN const char Taugo[] E_INIT("augo");
982 EXTERN const char Tbracket[] E_INIT("[");
983 #define Tdot (Tsgdot + 2)
984 #define Talias (Tunalias + 2)
985 EXTERN const char Tbadnum[] E_INIT("bad number");
986 #define Tbadsubst (Tfg_badsubst + 10)
987 EXTERN const char Tbg[] E_INIT("bg");
988 EXTERN const char Tbad_bsize[] E_INIT("bad shf/buf/bsize");
989 #define Tbsize (Tbad_bsize + 12)
990 EXTERN const char Tbad_sig_ss[] E_INIT("%s: bad signal '%s'");
991 #define Tbad_sig_s (Tbad_sig_ss + 4)
992 EXTERN const char Tsgbreak[] E_INIT("*=break");
993 #define Tbreak (Tsgbreak + 2)
994 EXTERN const char T__builtin[] E_INIT("-\\builtin");
995 #define T_builtin (T__builtin + 1)
996 #define Tbuiltin (T__builtin + 2)
997 EXTERN const char Toomem[] E_INIT("can't allocate %zu data bytes");
998 EXTERN const char Tcant_cd[] E_INIT("restricted shell - can't cd");
999 EXTERN const char Tcant_find[] E_INIT("can't find");
1000 EXTERN const char Tcant_open[] E_INIT("can't open");
1001 #define Tbytes (Toomem + 24)
1002 EXTERN const char Tbcat[] E_INIT("!cat");
1003 #define Tcat (Tbcat + 1)
1004 #define Tcd (Tcant_cd + 25)
1005 #define T_command (T_funny_command + 9)
1006 #define Tcommand (T_funny_command + 10)
1007 EXTERN const char Tsgcontinue[] E_INIT("*=continue");
1008 #define Tcontinue (Tsgcontinue + 2)
1009 EXTERN const char Tcreate[] E_INIT("create");
1010 EXTERN const char TELIF_unexpected[] E_INIT("TELIF unexpected");
1011 EXTERN const char TEXECSHELL[] E_INIT("EXECSHELL");
1012 EXTERN const char TENV[] E_INIT("ENV");
1013 EXTERN const char Tdsgexport[] E_INIT("^*=export");
1014 #define Texport (Tdsgexport + 3)
1015 #ifdef __OS2__
1016 EXTERN const char Textproc[] E_INIT("extproc");
1017 #endif
1018 EXTERN const char Tfalse[] E_INIT("false");
1019 EXTERN const char Tfg[] E_INIT("fg");
1020 EXTERN const char Tfg_badsubst[] E_INIT("fileglob: bad substitution");
1021 #define Tfile (Tfile_fd + 20)
1022 EXTERN const char Tfile_fd[] E_INIT("function definition file");
1023 EXTERN const char TFPATH[] E_INIT("FPATH");
1024 EXTERN const char T_function[] E_INIT(" function");
1025 #define Tfunction (T_function + 1)
1026 EXTERN const char T_funny_command[] E_INIT("funny $()-command");
1027 EXTERN const char Tgetopts[] E_INIT("getopts");
1028 #define Thistory (Tnot_in_history + 7)
1029 EXTERN const char Tintovfl[] E_INIT("integer overflow %zu %c %zu prevented");
1030 EXTERN const char Tinvname[] E_INIT("%s: invalid %s name");
1031 EXTERN const char Tjobs[] E_INIT("jobs");
1032 EXTERN const char Tjob_not_started[] E_INIT("job not started");
1033 EXTERN const char Tmksh[] E_INIT("mksh");
1034 #define Tname (Tinvname + 15)
1035 EXTERN const char Tno_args[] E_INIT("missing argument");
1036 EXTERN const char Tno_OLDPWD[] E_INIT("no OLDPWD");
1037 EXTERN const char Tnot_ident[] E_INIT("is not an identifier");
1038 EXTERN const char Tnot_in_history[] E_INIT("not in history");
1039 EXTERN const char Tnot_found_s[] E_INIT("%s not found");
1040 #define Tnot_found (Tnot_found_s + 3)
1041 #define Tnot_started (Tjob_not_started + 4)
1042 #define TOLDPWD (Tno_OLDPWD + 3)
1043 #define Topen (Tcant_open + 6)
1044 EXTERN const char To_o_reset[] E_INIT(" -o .reset");
1045 #define To_reset (To_o_reset + 4)
1046 #define TPATH (TFPATH + 1)
1047 #define Tpo (Tset_po + 4)
1048 #define Tpv (TpVv + 1)
1049 EXTERN const char TpVv[] E_INIT("Vpv");
1050 #define TPWD (Tno_OLDPWD + 6)
1051 #define Tread (Tshf_read + 4)
1052 EXTERN const char Tdsgreadonly[] E_INIT("^*=readonly");
1053 #define Treadonly (Tdsgreadonly + 3)
1054 EXTERN const char Tredirection_dup[] E_INIT("can't finish (dup) redirection");
1055 #define Tredirection (Tredirection_dup + 19)
1056 #define Treal_sp1 (Treal_sp2 + 1)
1057 EXTERN const char Treal_sp2[] E_INIT(" real ");
1058 EXTERN const char TREPLY[] E_INIT("REPLY");
1059 EXTERN const char Treq_arg[] E_INIT("requires an argument");
1060 EXTERN const char Tselect[] E_INIT("select");
1061 #define Tset (Tf_parm + 18)
1062 EXTERN const char Tset_po[] E_INIT("set +o");
1063 EXTERN const char Tsghset[] E_INIT("*=#set");
1064 #define Tsh (Tmksh + 2)
1065 #define TSHELL (TEXECSHELL + 4)
1066 #define Tshell (Ttoo_many_files + 23)
1067 EXTERN const char Tshf_read[] E_INIT("shf_read");
1068 EXTERN const char Tshf_write[] E_INIT("shf_write");
1069 EXTERN const char Tgsource[] E_INIT("=source");
1070 #define Tsource (Tgsource + 1)
1071 EXTERN const char Tj_suspend[] E_INIT("j_suspend");
1072 #define Tsuspend (Tj_suspend + 2)
1073 EXTERN const char Tsynerr[] E_INIT("syntax error");
1074 EXTERN const char Ttime[] E_INIT("time");
1075 EXTERN const char Ttoo_many_args[] E_INIT("too many arguments");
1076 EXTERN const char Ttoo_many_files[] E_INIT("too many open files in shell");
1077 EXTERN const char Ttrue[] E_INIT("true");
1078 EXTERN const char Ttty_fd_dupof[] E_INIT("dup of tty fd");
1079 #define Ttty_fd (Ttty_fd_dupof + 7)
1080 EXTERN const char Tdgtypeset[] E_INIT("^=typeset");
1081 #define Ttypeset (Tdgtypeset + 2)
1082 #define Tugo (Taugo + 1)
1083 EXTERN const char Tunalias[] E_INIT("unalias");
1084 #define Tunexpected (TELIF_unexpected + 6)
1085 EXTERN const char Tunexpected_type[] E_INIT("%s: unexpected %s type %d");
1086 EXTERN const char Tunknown_option[] E_INIT("unknown option");
1087 EXTERN const char Tunwind[] E_INIT("unwind");
1088 #define Tuser_sp1 (Tuser_sp2 + 1)
1089 EXTERN const char Tuser_sp2[] E_INIT(" user ");
1090 #define Twrite (Tshf_write + 4)
1091 EXTERN const char Tf__S[] E_INIT(" %S");
1092 #define Tf__d (Tunexpected_type + 22)
1093 #define Tf_ss (Tf__ss + 1)
1094 EXTERN const char Tf__ss[] E_INIT(" %s%s");
1095 #define Tf__sN (Tf_s_s_sN + 5)
1096 #define Tf_T (Tf_s_T + 3)
1097 EXTERN const char Tf_dN[] E_INIT("%d\n");
1098 EXTERN const char Tf_s_[] E_INIT("%s ");
1099 EXTERN const char Tf_s_T[] E_INIT("%s %T");
1100 EXTERN const char Tf_s_s_sN[] E_INIT("%s %s %s\n");
1101 #define Tf_s_s (Tf_sD_s_s + 4)
1102 #define Tf__s_s (Tf_sD_s_s + 3)
1103 #define Tf_s_sD_s (Tf_cant_ss_s + 6)
1104 EXTERN const char Tf_optfoo[] E_INIT("%s%s-%c: %s");
1105 EXTERN const char Tf_sD_[] E_INIT("%s: ");
1106 EXTERN const char Tf_szs[] E_INIT("%s: %zd %s");
1107 EXTERN const char Tf_parm[] E_INIT("%s: parameter not set");
1108 EXTERN const char Tf_coproc[] E_INIT("-p: %s");
1109 EXTERN const char Tf_cant_s[] E_INIT("%s: can't %s");
1110 EXTERN const char Tf_cant_ss_s[] E_INIT("can't %s %s: %s");
1111 EXTERN const char Tf_heredoc[] E_INIT("here document '%s' unclosed");
1112 #if HAVE_MKNOD
1113 EXTERN const char Tf_nonnum[] E_INIT("non-numeric %s %s '%s'");
1114 #endif
1115 EXTERN const char Tf_S_[] E_INIT("%S ");
1116 #define Tf_S (Tf__S + 1)
1117 #define Tf_lu (Tf_toolarge + 17)
1118 EXTERN const char Tf_toolarge[] E_INIT("%s %s too large: %lu");
1119 EXTERN const char Tf_ldfailed[] E_INIT("%s %s(%d, %ld) failed: %s");
1120 EXTERN const char Tf_sD_s_sD_s[] E_INIT("%s: %s %s: %s");
1121 EXTERN const char Tf_toomany[] E_INIT("too many %ss");
1122 EXTERN const char Tf_sd[] E_INIT("%s %d");
1123 #define Tf_s (Tf_temp + 28)
1124 EXTERN const char Tft_end[] E_INIT("%;");
1125 EXTERN const char Tft_R[] E_INIT("%R");
1126 #define Tf_d (Tunexpected_type + 23)
1127 EXTERN const char Tf_sD_s_qs[] E_INIT("%s: %s '%s'");
1128 EXTERN const char Tf_ro[] E_INIT("read-only: %s");
1129 EXTERN const char Tf_flags[] E_INIT("%s: flags 0x%X");
1130 EXTERN const char Tf_temp[] E_INIT("can't %s temporary file %s: %s");
1131 EXTERN const char Tf_ssfaileds[] E_INIT("%s: %s failed: %s");
1132 EXTERN const char Tf_sD_sD_s[] E_INIT("%s: %s: %s");
1133 EXTERN const char Tf__c_[] E_INIT("-%c ");
1134 EXTERN const char Tf_sD_s_s[] E_INIT("%s: %s %s");
1135 #define Tf_sN (Tf_s_s_sN + 6)
1136 #define Tf_sD_s (Tf_temp + 24)
1137 EXTERN const char T_devtty[] E_INIT("/dev/tty");
1138 #else /* helpers for string pooling */
1139 #define T4spaces " "
1140 #define T1space " "
1141 #define Tcolsp ": "
1142 #define TC_IFSWS " \t\n"
1143 #define TinitIFS "IFS= \t\n"
1144 #define TFCEDIT_dollaru "${FCEDIT:-/bin/ed} $_"
1145 #define Tspdollaru " $_"
1146 #define Tsgdot "*=."
1147 #define Taugo "augo"
1148 #define Tbracket "["
1149 #define Tdot "."
1150 #define Talias "alias"
1151 #define Tbadnum "bad number"
1152 #define Tbadsubst "bad substitution"
1153 #define Tbg "bg"
1154 #define Tbad_bsize "bad shf/buf/bsize"
1155 #define Tbsize "bsize"
1156 #define Tbad_sig_ss "%s: bad signal '%s'"
1157 #define Tbad_sig_s "bad signal '%s'"
1158 #define Tsgbreak "*=break"
1159 #define Tbreak "break"
1160 #define T__builtin "-\\builtin"
1161 #define T_builtin "\\builtin"
1162 #define Tbuiltin "builtin"
1163 #define Toomem "can't allocate %zu data bytes"
1164 #define Tcant_cd "restricted shell - can't cd"
1165 #define Tcant_find "can't find"
1166 #define Tcant_open "can't open"
1167 #define Tbytes "bytes"
1168 #define Tbcat "!cat"
1169 #define Tcat "cat"
1170 #define Tcd "cd"
1171 #define T_command "-command"
1172 #define Tcommand "command"
1173 #define Tsgcontinue "*=continue"
1174 #define Tcontinue "continue"
1175 #define Tcreate "create"
1176 #define TELIF_unexpected "TELIF unexpected"
1177 #define TEXECSHELL "EXECSHELL"
1178 #define TENV "ENV"
1179 #define Tdsgexport "^*=export"
1180 #define Texport "export"
1181 #ifdef __OS2__
1182 #define Textproc "extproc"
1183 #endif
1184 #define Tfalse "false"
1185 #define Tfg "fg"
1186 #define Tfg_badsubst "fileglob: bad substitution"
1187 #define Tfile "file"
1188 #define Tfile_fd "function definition file"
1189 #define TFPATH "FPATH"
1190 #define T_function " function"
1191 #define Tfunction "function"
1192 #define T_funny_command "funny $()-command"
1193 #define Tgetopts "getopts"
1194 #define Thistory "history"
1195 #define Tintovfl "integer overflow %zu %c %zu prevented"
1196 #define Tinvname "%s: invalid %s name"
1197 #define Tjobs "jobs"
1198 #define Tjob_not_started "job not started"
1199 #define Tmksh "mksh"
1200 #define Tname "name"
1201 #define Tno_args "missing argument"
1202 #define Tno_OLDPWD "no OLDPWD"
1203 #define Tnot_ident "is not an identifier"
1204 #define Tnot_in_history "not in history"
1205 #define Tnot_found_s "%s not found"
1206 #define Tnot_found "not found"
1207 #define Tnot_started "not started"
1208 #define TOLDPWD "OLDPWD"
1209 #define Topen "open"
1210 #define To_o_reset " -o .reset"
1211 #define To_reset ".reset"
1212 #define TPATH "PATH"
1213 #define Tpo "+o"
1214 #define Tpv "pv"
1215 #define TpVv "Vpv"
1216 #define TPWD "PWD"
1217 #define Tread "read"
1218 #define Tdsgreadonly "^*=readonly"
1219 #define Treadonly "readonly"
1220 #define Tredirection_dup "can't finish (dup) redirection"
1221 #define Tredirection "redirection"
1222 #define Treal_sp1 "real "
1223 #define Treal_sp2 " real "
1224 #define TREPLY "REPLY"
1225 #define Treq_arg "requires an argument"
1226 #define Tselect "select"
1227 #define Tset "set"
1228 #define Tset_po "set +o"
1229 #define Tsghset "*=#set"
1230 #define Tsh "sh"
1231 #define TSHELL "SHELL"
1232 #define Tshell "shell"
1233 #define Tshf_read "shf_read"
1234 #define Tshf_write "shf_write"
1235 #define Tgsource "=source"
1236 #define Tsource "source"
1237 #define Tj_suspend "j_suspend"
1238 #define Tsuspend "suspend"
1239 #define Tsynerr "syntax error"
1240 #define Ttime "time"
1241 #define Ttoo_many_args "too many arguments"
1242 #define Ttoo_many_files "too many open files in shell"
1243 #define Ttrue "true"
1244 #define Ttty_fd_dupof "dup of tty fd"
1245 #define Ttty_fd "tty fd"
1246 #define Tdgtypeset "^=typeset"
1247 #define Ttypeset "typeset"
1248 #define Tugo "ugo"
1249 #define Tunalias "unalias"
1250 #define Tunexpected "unexpected"
1251 #define Tunexpected_type "%s: unexpected %s type %d"
1252 #define Tunknown_option "unknown option"
1253 #define Tunwind "unwind"
1254 #define Tuser_sp1 "user "
1255 #define Tuser_sp2 " user "
1256 #define Twrite "write"
1257 #define Tf__S " %S"
1258 #define Tf__d " %d"
1259 #define Tf_ss "%s%s"
1260 #define Tf__ss " %s%s"
1261 #define Tf__sN " %s\n"
1262 #define Tf_T "%T"
1263 #define Tf_dN "%d\n"
1264 #define Tf_s_ "%s "
1265 #define Tf_s_T "%s %T"
1266 #define Tf_s_s_sN "%s %s %s\n"
1267 #define Tf_s_s "%s %s"
1268 #define Tf__s_s " %s %s"
1269 #define Tf_s_sD_s "%s %s: %s"
1270 #define Tf_optfoo "%s%s-%c: %s"
1271 #define Tf_sD_ "%s: "
1272 #define Tf_szs "%s: %zd %s"
1273 #define Tf_parm "%s: parameter not set"
1274 #define Tf_coproc "-p: %s"
1275 #define Tf_cant_s "%s: can't %s"
1276 #define Tf_cant_ss_s "can't %s %s: %s"
1277 #define Tf_heredoc "here document '%s' unclosed"
1278 #if HAVE_MKNOD
1279 #define Tf_nonnum "non-numeric %s %s '%s'"
1280 #endif
1281 #define Tf_S_ "%S "
1282 #define Tf_S "%S"
1283 #define Tf_lu "%lu"
1284 #define Tf_toolarge "%s %s too large: %lu"
1285 #define Tf_ldfailed "%s %s(%d, %ld) failed: %s"
1286 #define Tf_sD_s_sD_s "%s: %s %s: %s"
1287 #define Tf_toomany "too many %ss"
1288 #define Tf_sd "%s %d"
1289 #define Tf_s "%s"
1290 #define Tft_end "%;"
1291 #define Tft_R "%R"
1292 #define Tf_d "%d"
1293 #define Tf_sD_s_qs "%s: %s '%s'"
1294 #define Tf_ro "read-only: %s"
1295 #define Tf_flags "%s: flags 0x%X"
1296 #define Tf_temp "can't %s temporary file %s: %s"
1297 #define Tf_ssfaileds "%s: %s failed: %s"
1298 #define Tf_sD_sD_s "%s: %s: %s"
1299 #define Tf__c_ "-%c "
1300 #define Tf_sD_s_s "%s: %s %s"
1301 #define Tf_sN "%s\n"
1302 #define Tf_sD_s "%s: %s"
1303 #define T_devtty "/dev/tty"
1304 #endif /* end of string pooling */
1305
1306 typedef uint8_t Temp_type;
1307 /* expanded heredoc */
1308 #define TT_HEREDOC_EXP 0
1309 /* temporary file used for history editing (fc -e) */
1310 #define TT_HIST_EDIT 1
1311 /* temporary file used during in-situ command substitution */
1312 #define TT_FUNSUB 2
1313
1314 /* temp/heredoc files. The file is removed when the struct is freed. */
1315 struct temp {
1316 struct temp *next;
1317 struct shf *shf;
1318 /* pid of process parsed here-doc */
1319 pid_t pid;
1320 Temp_type type;
1321 /* actually longer: name (variable length) */
1322 char tffn[3];
1323 };
1324
1325 /*
1326 * stdio and our IO routines
1327 */
1328
1329 #define shl_xtrace (&shf_iob[0]) /* for set -x */
1330 #define shl_stdout (&shf_iob[1])
1331 #define shl_out (&shf_iob[2])
1332 #ifdef DF
1333 #define shl_dbg (&shf_iob[3]) /* for DF() */
1334 #endif
1335 EXTERN bool shl_stdout_ok;
1336
1337 /*
1338 * trap handlers
1339 */
1340 typedef struct trap {
1341 const char *name; /* short name */
1342 const char *mess; /* descriptive name */
1343 char *trap; /* trap command */
1344 sig_t cursig; /* current handler (valid if TF_ORIG_* set) */
1345 sig_t shtrap; /* shell signal handler */
1346 int signal; /* signal number */
1347 int flags; /* TF_* */
1348 volatile sig_atomic_t set; /* trap pending */
1349 } Trap;
1350
1351 /* values for Trap.flags */
1352 #define TF_SHELL_USES BIT(0) /* shell uses signal, user can't change */
1353 #define TF_USER_SET BIT(1) /* user has (tried to) set trap */
1354 #define TF_ORIG_IGN BIT(2) /* original action was SIG_IGN */
1355 #define TF_ORIG_DFL BIT(3) /* original action was SIG_DFL */
1356 #define TF_EXEC_IGN BIT(4) /* restore SIG_IGN just before exec */
1357 #define TF_EXEC_DFL BIT(5) /* restore SIG_DFL just before exec */
1358 #define TF_DFL_INTR BIT(6) /* when received, default action is LINTR */
1359 #define TF_TTY_INTR BIT(7) /* tty generated signal (see j_waitj) */
1360 #define TF_CHANGED BIT(8) /* used by runtrap() to detect trap changes */
1361 #define TF_FATAL BIT(9) /* causes termination if not trapped */
1362
1363 /* values for setsig()/setexecsig() flags argument */
1364 #define SS_RESTORE_MASK 0x3 /* how to restore a signal before an exec() */
1365 #define SS_RESTORE_CURR 0 /* leave current handler in place */
1366 #define SS_RESTORE_ORIG 1 /* restore original handler */
1367 #define SS_RESTORE_DFL 2 /* restore to SIG_DFL */
1368 #define SS_RESTORE_IGN 3 /* restore to SIG_IGN */
1369 #define SS_FORCE BIT(3) /* set signal even if original signal ignored */
1370 #define SS_USER BIT(4) /* user is doing the set (ie, trap command) */
1371 #define SS_SHTRAP BIT(5) /* trap for internal use (ALRM, CHLD, WINCH) */
1372
1373 #define ksh_SIGEXIT 0 /* for trap EXIT */
1374 #define ksh_SIGERR ksh_NSIG /* for trap ERR */
1375
1376 EXTERN volatile sig_atomic_t trap; /* traps pending? */
1377 EXTERN volatile sig_atomic_t intrsig; /* pending trap interrupts command */
1378 EXTERN volatile sig_atomic_t fatal_trap; /* received a fatal signal */
1379 extern Trap sigtraps[ksh_NSIG + 1];
1380
1381 /* got_winch = 1 when we need to re-adjust the window size */
1382 #ifdef SIGWINCH
1383 EXTERN volatile sig_atomic_t got_winch E_INIT(1);
1384 #else
1385 #define got_winch true
1386 #endif
1387
1388 /*
1389 * TMOUT support
1390 */
1391 /* values for ksh_tmout_state */
1392 enum tmout_enum {
1393 TMOUT_EXECUTING = 0, /* executing commands */
1394 TMOUT_READING, /* waiting for input */
1395 TMOUT_LEAVING /* have timed out */
1396 };
1397 EXTERN unsigned int ksh_tmout;
1398 EXTERN enum tmout_enum ksh_tmout_state;
1399
1400 /* For "You have stopped jobs" message */
1401 EXTERN bool really_exit;
1402
1403 /*
1404 * fast character classes
1405 */
1406
1407 /* internal types, do not reference */
1408
1409 /* initially empty — filled at runtime from $IFS */
1410 #define CiIFS BIT(0)
1411 #define CiCNTRL BIT(1) /* \x01‥\x08\x0E‥\x1F\x7F */
1412 #define CiUPPER BIT(2) /* A‥Z */
1413 #define CiLOWER BIT(3) /* a‥z */
1414 #define CiHEXLT BIT(4) /* A‥Fa‥f */
1415 #define CiOCTAL BIT(5) /* 0‥7 */
1416 #define CiQCL BIT(6) /* &();| */
1417 #define CiALIAS BIT(7) /* !,.@ */
1418 #define CiQCX BIT(8) /* *[\\ */
1419 #define CiVAR1 BIT(9) /* !*@ */
1420 #define CiQCM BIT(10) /* /^~ */
1421 #define CiDIGIT BIT(11) /* 89 */
1422 #define CiQC BIT(12) /* "' */
1423 #define CiSPX BIT(13) /* \x0B\x0C */
1424 #define CiCURLY BIT(14) /* {} */
1425 #define CiANGLE BIT(15) /* <> */
1426 #define CiNUL BIT(16) /* \x00 */
1427 #define CiTAB BIT(17) /* \x09 */
1428 #define CiNL BIT(18) /* \x0A */
1429 #define CiCR BIT(19) /* \x0D */
1430 #define CiSP BIT(20) /* \x20 */
1431 #define CiHASH BIT(21) /* # */
1432 #define CiSS BIT(22) /* $ */
1433 #define CiPERCT BIT(23) /* % */
1434 #define CiPLUS BIT(24) /* + */
1435 #define CiMINUS BIT(25) /* - */
1436 #define CiCOLON BIT(26) /* : */
1437 #define CiEQUAL BIT(27) /* = */
1438 #define CiQUEST BIT(28) /* ? */
1439 #define CiBRACK BIT(29) /* [] */
1440 #define CiUNDER BIT(30) /* _ */
1441 #define CiGRAVE BIT(31) /* ` */
1442 /* out of space, but one for *@ would make sense, possibly others */
1443
1444 /* compile-time initialised, ASCII only */
1445 extern const uint32_t tpl_ctypes[128];
1446 /* run-time, contains C_IFS as well, full 2⁸ octet range */
1447 EXTERN uint32_t ksh_ctypes[256];
1448 /* first octet of $IFS, for concatenating "$*" */
1449 EXTERN char ifs0;
1450
1451 /* external types */
1452
1453 /* !%+,-.0‥9:@A‥Z[]_a‥z valid characters in alias names */
1454 #define C_ALIAS (CiALIAS | CiBRACK | CiCOLON | CiDIGIT | CiLOWER | CiMINUS | CiOCTAL | CiPERCT | CiPLUS | CiUNDER | CiUPPER)
1455 /* 0‥9A‥Za‥z alphanumerical */
1456 #define C_ALNUM (CiDIGIT | CiLOWER | CiOCTAL | CiUPPER)
1457 /* 0‥9A‥Z_a‥z alphanumerical plus underscore (“word character”) */
1458 #define C_ALNUX (CiDIGIT | CiLOWER | CiOCTAL | CiUNDER | CiUPPER)
1459 /* A‥Za‥z alphabetical (upper plus lower) */
1460 #define C_ALPHA (CiLOWER | CiUPPER)
1461 /* A‥Z_a‥z alphabetical plus underscore (identifier lead) */
1462 #define C_ALPHX (CiLOWER | CiUNDER | CiUPPER)
1463 /* \x01‥\x7F 7-bit ASCII except NUL */
1464 #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)
1465 /* \x09\x20 tab and space */
1466 #define C_BLANK (CiSP | CiTAB)
1467 /* \x09\x20"' separator for completion */
1468 #define C_CFS (CiQC | CiSP | CiTAB)
1469 /* \x00‥\x1F\x7F POSIX control characters */
1470 #define C_CNTRL (CiCNTRL | CiCR | CiNL | CiNUL | CiSPX | CiTAB)
1471 /* 0‥9 decimal digits */
1472 #define C_DIGIT (CiDIGIT | CiOCTAL)
1473 /* &();`| editor x_locate_word() command */
1474 #define C_EDCMD (CiGRAVE | CiQCL)
1475 /* \x09\x0A\x20"&'():;<=>`| editor non-word characters */
1476 #define C_EDNWC (CiANGLE | CiCOLON | CiEQUAL | CiGRAVE | CiNL | CiQC | CiQCL | CiSP | CiTAB)
1477 /* "#$&'()*:;<=>?[\\`{|} editor quotes for tab completion */
1478 #define C_EDQ (CiANGLE | CiCOLON | CiCURLY | CiEQUAL | CiGRAVE | CiHASH | CiQC | CiQCL | CiQCX | CiQUEST | CiSS)
1479 /* !‥~ POSIX graphical (alphanumerical plus punctuation) */
1480 #define C_GRAPH (C_PUNCT | CiDIGIT | CiLOWER | CiOCTAL | CiUPPER)
1481 /* A‥Fa‥f hex letter */
1482 #define C_HEXLT CiHEXLT
1483 /* \x00 + $IFS IFS whitespace, IFS non-whitespace, NUL */
1484 #define C_IFS (CiIFS | CiNUL)
1485 /* \x09\x0A\x20 IFS whitespace */
1486 #define C_IFSWS (CiNL | CiSP | CiTAB)
1487 /* \x09\x0A\x20&();<>| (for the lexer) */
1488 #define C_LEX1 (CiANGLE | CiNL | CiQCL | CiSP | CiTAB)
1489 /* a‥z lowercase letters */
1490 #define C_LOWER CiLOWER
1491 /* not alnux or dollar separator for motion */
1492 #define C_MFS (CiALIAS | CiANGLE | CiBRACK | CiCNTRL | CiCOLON | CiCR | CiCURLY | CiEQUAL | CiGRAVE | CiHASH | CiMINUS | CiNL | CiNUL | CiPERCT | CiPLUS | CiQC | CiQCL | CiQCM | CiQCX | CiQUEST | CiSP | CiSPX | CiTAB)
1493 /* 0‥7 octal digit */
1494 #define C_OCTAL CiOCTAL
1495 /* !*+?@ pattern magical operator, except space */
1496 #define C_PATMO (CiPLUS | CiQUEST | CiVAR1)
1497 /* \x20‥~ POSIX printable characters (graph plus space) */
1498 #define C_PRINT (C_GRAPH | CiSP)
1499 /* !"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~ POSIX punctuation */
1500 #define C_PUNCT (CiALIAS | CiANGLE | CiBRACK | CiCOLON | CiCURLY | CiEQUAL | CiGRAVE | CiHASH | CiMINUS | CiPERCT | CiPLUS | CiQC | CiQCL | CiQCM | CiQCX | CiQUEST | CiSS | CiUNDER)
1501 /* \x09\x0A"#$&'()*;<=>?[\\]`| characters requiring quoting, minus space */
1502 #define C_QUOTE (CiANGLE | CiBRACK | CiEQUAL | CiGRAVE | CiHASH | CiNL | CiQC | CiQCL | CiQCX | CiQUEST | CiSS | CiTAB)
1503 /* 0‥9A‥Fa‥f hexadecimal digit */
1504 #define C_SEDEC (CiDIGIT | CiHEXLT | CiOCTAL)
1505 /* \x09‥\x0D\x20 POSIX space class */
1506 #define C_SPACE (CiCR | CiNL | CiSP | CiSPX | CiTAB)
1507 /* +-=? substitution operations with word */
1508 #define C_SUB1 (CiEQUAL | CiMINUS | CiPLUS | CiQUEST)
1509 /* #% substitution operations with pattern */
1510 #define C_SUB2 (CiHASH | CiPERCT)
1511 /* A‥Z uppercase letters */
1512 #define C_UPPER CiUPPER
1513 /* !#$*-?@ substitution parameters, other than positional */
1514 #define C_VAR1 (CiHASH | CiMINUS | CiQUEST | CiSS | CiVAR1)
1515
1516 /* individual chars you might like */
1517 #define C_ANGLE CiANGLE /* <> angle brackets */
1518 #define C_COLON CiCOLON /* : colon */
1519 #define C_CR CiCR /* \x0D ASCII carriage return */
1520 #define C_DOLAR CiSS /* $ dollar sign */
1521 #define C_EQUAL CiEQUAL /* = equals sign */
1522 #define C_GRAVE CiGRAVE /* ` accent gravis */
1523 #define C_HASH CiHASH /* # hash sign */
1524 #define C_LF CiNL /* \x0A ASCII line feed */
1525 #define C_MINUS CiMINUS /* - hyphen-minus */
1526 #ifdef MKSH_WITH_TEXTMODE
1527 #define C_NL (CiNL | CiCR) /* CR or LF under OS/2 TEXTMODE */
1528 #else
1529 #define C_NL CiNL /* LF only like under Unix */
1530 #endif
1531 #define C_NUL CiNUL /* \x00 ASCII NUL */
1532 #define C_PLUS CiPLUS /* + plus sign */
1533 #define C_QC CiQC /* "' quote characters */
1534 #define C_QUEST CiQUEST /* ? question mark */
1535 #define C_SPC CiSP /* \x20 ASCII space */
1536 #define C_TAB CiTAB /* \x09 ASCII horizontal tabulator */
1537 #define C_UNDER CiUNDER /* _ underscore */
1538
1539 /* identity transform of octet */
1540 #if defined(DEBUG) && defined(__GNUC__) && !defined(__ICC) && \
1541 !defined(__INTEL_COMPILER) && !defined(__SUNPRO_C)
1542 extern unsigned int eek_ord;
1543 #define ORD(c) ((size_t)(c) > 0xFF ? eek_ord : \
1544 ((unsigned int)(unsigned char)(c)))
1545 #define ord(c) __builtin_choose_expr( \
1546 __builtin_types_compatible_p(__typeof__(c), char) || \
1547 __builtin_types_compatible_p(__typeof__(c), unsigned char), \
1548 ((unsigned int)(unsigned char)(c)), ({ \
1549 size_t ord_c = (c); \
1550 \
1551 if (ord_c > (size_t)0xFFU) \
1552 internal_errorf("%s:%d:ord(%zX)", \
1553 __FILE__, __LINE__, ord_c); \
1554 ((unsigned int)(unsigned char)(ord_c)); \
1555 }))
1556 #else
1557 #define ord(c) ((unsigned int)(unsigned char)(c))
1558 #define ORD(c) ord(c) /* may evaluate arguments twice */
1559 #endif
1560 #if defined(MKSH_EBCDIC) || defined(MKSH_FAUX_EBCDIC)
1561 EXTERN unsigned short ebcdic_map[256];
1562 EXTERN unsigned char ebcdic_rtt_toascii[256];
1563 EXTERN unsigned char ebcdic_rtt_fromascii[256];
1564 extern void ebcdic_init(void);
1565 /* one-way to-ascii-or-high conversion, for POSIX locale ordering */
1566 #define asciibetical(c) ((unsigned int)ebcdic_map[(unsigned char)(c)])
1567 /* two-way round-trip conversion, for general use */
1568 #define rtt2asc(c) ebcdic_rtt_toascii[(unsigned char)(c)]
1569 #define asc2rtt(c) ebcdic_rtt_fromascii[(unsigned char)(c)]
1570 /* case-independent char comparison */
1571 #define ksh_eq(c,u,l) (ord(c) == ord(u) || ord(c) == ord(l))
1572 #else
1573 #define asciibetical(c) ord(c)
1574 #define rtt2asc(c) ((unsigned char)(c))
1575 #define asc2rtt(c) ((unsigned char)(c))
1576 #define ksh_eq(c,u,l) ((ord(c) | 0x20) == ord(l))
1577 #endif
1578 /* control character foo */
1579 #ifdef MKSH_EBCDIC
1580 #define ksh_isctrl(c) (ord(c) < 0x40 || ord(c) == 0xFF)
1581 #else
1582 #define ksh_isctrl(c) ((ord(c) & 0x7F) < 0x20 || ord(c) == 0x7F)
1583 #endif
1584 /* new fast character classes */
1585 #define ctype(c,t) tobool(ksh_ctypes[ord(c)] & (t))
1586 #define cinttype(c,t) ((c) >= 0 && (c) <= 0xFF ? \
1587 tobool(ksh_ctypes[(unsigned char)(c)] & (t)) : false)
1588 /* helper functions */
1589 #define ksh_isdash(s) tobool(ord((s)[0]) == '-' && ord((s)[1]) == '\0')
1590 /* invariant distance even in EBCDIC */
1591 #define ksh_tolower(c) (ctype(c, C_UPPER) ? (c) - 'A' + 'a' : (c))
1592 #define ksh_toupper(c) (ctype(c, C_LOWER) ? (c) - 'a' + 'A' : (c))
1593 /* strictly speaking rtt2asc() here, but this works even in EBCDIC */
1594 #define ksh_numdig(c) (ord(c) - ORD('0'))
1595 #define ksh_numuc(c) (rtt2asc(c) - rtt2asc('A'))
1596 #define ksh_numlc(c) (rtt2asc(c) - rtt2asc('a'))
1597 #define ksh_toctrl(c) asc2rtt(ord(c) == ORD('?') ? 0x7F : rtt2asc(c) & 0x9F)
1598 #define ksh_unctrl(c) asc2rtt(rtt2asc(c) ^ 0x40U)
1599
1600 #ifdef MKSH_SMALL
1601 #define SMALLP(x) /* nothing */
1602 #else
1603 #define SMALLP(x) , x
1604 #endif
1605
1606 /* Argument parsing for built-in commands and getopts command */
1607
1608 /* Values for Getopt.flags */
1609 #define GF_ERROR BIT(0) /* call errorf() if there is an error */
1610 #define GF_PLUSOPT BIT(1) /* allow +c as an option */
1611 #define GF_NONAME BIT(2) /* don't print argv[0] in errors */
1612
1613 /* Values for Getopt.info */
1614 #define GI_MINUS BIT(0) /* an option started with -... */
1615 #define GI_PLUS BIT(1) /* an option started with +... */
1616 #define GI_MINUSMINUS BIT(2) /* arguments were ended with -- */
1617
1618 /* in case some OS defines these */
1619 #undef optarg
1620 #undef optind
1621
1622 typedef struct {
1623 const char *optarg;
1624 int optind;
1625 int uoptind; /* what user sees in $OPTIND */
1626 int flags; /* see GF_* */
1627 int info; /* see GI_* */
1628 unsigned int p; /* 0 or index into argv[optind - 1] */
1629 char buf[2]; /* for bad option OPTARG value */
1630 } Getopt;
1631
1632 EXTERN Getopt builtin_opt; /* for shell builtin commands */
1633 EXTERN Getopt user_opt; /* parsing state for getopts builtin command */
1634
1635 /* This for co-processes */
1636
1637 /* something that won't (realisticly) wrap */
1638 typedef int Coproc_id;
1639
1640 struct coproc {
1641 void *job; /* 0 or job of co-process using input pipe */
1642 int read; /* pipe from co-process's stdout */
1643 int readw; /* other side of read (saved temporarily) */
1644 int write; /* pipe to co-process's stdin */
1645 int njobs; /* number of live jobs using output pipe */
1646 Coproc_id id; /* id of current output pipe */
1647 };
1648 EXTERN struct coproc coproc;
1649
1650 #ifndef MKSH_NOPROSPECTOFWORK
1651 /* used in jobs.c and by coprocess stuff in exec.c and select() calls */
1652 EXTERN sigset_t sm_default, sm_sigchld;
1653 #endif
1654
1655 /* name of called builtin function (used by error functions) */
1656 EXTERN const char *builtin_argv0;
1657 /* is called builtin a POSIX special builtin? (error functions only) */
1658 EXTERN bool builtin_spec;
1659
1660 /* current working directory */
1661 EXTERN char *current_wd;
1662
1663 /* input line size */
1664 #ifdef MKSH_SMALL
1665 #define LINE (4096 - ALLOC_OVERHEAD)
1666 #else
1667 #define LINE (16384 - ALLOC_OVERHEAD)
1668 #endif
1669 /* columns and lines of the tty */
1670 EXTERN mksh_ari_t x_cols E_INIT(80);
1671 EXTERN mksh_ari_t x_lins E_INIT(24);
1672
1673
1674 /* Determine the location of the system (common) profile */
1675
1676 #ifndef MKSH_DEFAULT_PROFILEDIR
1677 #define MKSH_DEFAULT_PROFILEDIR MKSH_UNIXROOT "/etc"
1678 #endif
1679
1680 #define MKSH_SYSTEM_PROFILE MKSH_DEFAULT_PROFILEDIR "/profile"
1681 #define MKSH_SUID_PROFILE MKSH_DEFAULT_PROFILEDIR "/suid_profile"
1682
1683
1684 /* Used by v_evaluate() and setstr() to control action when error occurs */
1685 #define KSH_UNWIND_ERROR 0 /* unwind the stack (kshlongjmp) */
1686 #define KSH_RETURN_ERROR 1 /* return 1/0 for success/failure */
1687
1688 /*
1689 * Shell file I/O routines
1690 */
1691
1692 #define SHF_BSIZE 512
1693
1694 #define shf_fileno(shf) ((shf)->fd)
1695 #define shf_setfileno(shf,nfd) ((shf)->fd = (nfd))
1696 #define shf_getc_i(shf) ((shf)->rnleft > 0 ? \
1697 (shf)->rnleft--, (int)ord(*(shf)->rp++) : \
1698 shf_getchar(shf))
1699 #define shf_putc_i(c,shf) ((shf)->wnleft == 0 ? \
1700 shf_putchar((uint8_t)(c), (shf)) : \
1701 ((shf)->wnleft--, *(shf)->wp++ = (c)))
1702 #define shf_eof(shf) ((shf)->flags & SHF_EOF)
1703 #define shf_error(shf) ((shf)->flags & SHF_ERROR)
1704 #define shf_errno(shf) ((shf)->errnosv)
1705 #define shf_clearerr(shf) ((shf)->flags &= ~(SHF_EOF | SHF_ERROR))
1706
1707 /* Flags passed to shf_*open() */
1708 #define SHF_RD 0x0001
1709 #define SHF_WR 0x0002
1710 #define SHF_RDWR (SHF_RD | SHF_WR)
1711 #define SHF_ACCMODE 0x0003 /* mask */
1712 #define SHF_GETFL 0x0004 /* use fcntl() to figure RD/WR flags */
1713 #define SHF_UNBUF 0x0008 /* unbuffered I/O */
1714 #define SHF_CLEXEC 0x0010 /* set close on exec flag */
1715 #define SHF_MAPHI 0x0020 /* make fd > FDBASE (and close orig)
1716 * (shf_open() only) */
1717 #define SHF_DYNAMIC 0x0040 /* string: increase buffer as needed */
1718 #define SHF_INTERRUPT 0x0080 /* EINTR in read/write causes error */
1719 /* Flags used internally */
1720 #define SHF_STRING 0x0100 /* a string, not a file */
1721 #define SHF_ALLOCS 0x0200 /* shf and shf->buf were alloc()ed */
1722 #define SHF_ALLOCB 0x0400 /* shf->buf was alloc()ed */
1723 #define SHF_ERROR 0x0800 /* read()/write() error */
1724 #define SHF_EOF 0x1000 /* read eof (sticky) */
1725 #define SHF_READING 0x2000 /* currently reading: rnleft,rp valid */
1726 #define SHF_WRITING 0x4000 /* currently writing: wnleft,wp valid */
1727
1728
1729 struct shf {
1730 Area *areap; /* area shf/buf were allocated in */
1731 unsigned char *rp; /* read: current position in buffer */
1732 unsigned char *wp; /* write: current position in buffer */
1733 unsigned char *buf; /* buffer */
1734 ssize_t bsize; /* actual size of buf */
1735 ssize_t rbsize; /* size of buffer (1 if SHF_UNBUF) */
1736 ssize_t rnleft; /* read: how much data left in buffer */
1737 ssize_t wbsize; /* size of buffer (0 if SHF_UNBUF) */
1738 ssize_t wnleft; /* write: how much space left in buffer */
1739 int flags; /* see SHF_* */
1740 int fd; /* file descriptor */
1741 int errnosv; /* saved value of errno after error */
1742 };
1743
1744 extern struct shf shf_iob[];
1745
1746 struct table {
1747 Area *areap; /* area to allocate entries */
1748 struct tbl **tbls; /* hashed table items */
1749 size_t nfree; /* free table entries */
1750 uint8_t tshift; /* table size (2^tshift) */
1751 };
1752
1753 /* table item */
1754 struct tbl {
1755 /* Area to allocate from */
1756 Area *areap;
1757 /* value */
1758 union {
1759 char *s; /* string */
1760 mksh_ari_t i; /* integer */
1761 mksh_uari_t u; /* unsigned integer */
1762 int (*f)(const char **); /* built-in command */
1763 struct op *t; /* "function" tree */
1764 } val;
1765 union {
1766 struct tbl *array; /* array values */
1767 const char *fpath; /* temporary path to undef function */
1768 } u;
1769 union {
1770 int field; /* field with for -L/-R/-Z */
1771 int errnov; /* CEXEC/CTALIAS */
1772 } u2;
1773 union {
1774 uint32_t hval; /* hash(name) */
1775 uint32_t index; /* index for an array */
1776 } ua;
1777 /*
1778 * command type (see below), base (if INTEGER),
1779 * offset from val.s of value (if EXPORT)
1780 */
1781 int type;
1782 /* flags (see below) */
1783 uint32_t flag;
1784
1785 /* actually longer: name (variable length) */
1786 char name[4];
1787 };
1788
1789 EXTERN struct tbl *vtemp;
1790 /* set by isglobal(), global() and local() */
1791 EXTERN bool last_lookup_was_array;
1792
1793 /* common flag bits */
1794 #define ALLOC BIT(0) /* val.s has been allocated */
1795 #define DEFINED BIT(1) /* is defined in block */
1796 #define ISSET BIT(2) /* has value, vp->val.[si] */
1797 #define EXPORT BIT(3) /* exported variable/function */
1798 #define TRACE BIT(4) /* var: user flagged, func: execution tracing */
1799 /* (start non-common flags at 8) */
1800 /* flag bits used for variables */
1801 #define SPECIAL BIT(8) /* PATH, IFS, SECONDS, etc */
1802 #define INTEGER BIT(9) /* val.i contains integer value */
1803 #define RDONLY BIT(10) /* read-only variable */
1804 #define LOCAL BIT(11) /* for local typeset() */
1805 #define ARRAY BIT(13) /* array */
1806 #define LJUST BIT(14) /* left justify */
1807 #define RJUST BIT(15) /* right justify */
1808 #define ZEROFIL BIT(16) /* 0 filled if RJUSTIFY, strip 0s if LJUSTIFY */
1809 #define LCASEV BIT(17) /* convert to lower case */
1810 #define UCASEV_AL BIT(18) /* convert to upper case / autoload function */
1811 #define INT_U BIT(19) /* unsigned integer */
1812 #define INT_L BIT(20) /* long integer (no-op but used as magic) */
1813 #define IMPORT BIT(21) /* flag to typeset(): no arrays, must have = */
1814 #define LOCAL_COPY BIT(22) /* with LOCAL - copy attrs from existing var */
1815 #define EXPRINEVAL BIT(23) /* contents currently being evaluated */
1816 #define EXPRLVALUE BIT(24) /* useable as lvalue (temp flag) */
1817 #define AINDEX BIT(25) /* array index >0 = ua.index filled in */
1818 #define ASSOC BIT(26) /* ARRAY ? associative : reference */
1819 /* flag bits used for taliases/builtins/aliases/keywords/functions */
1820 #define KEEPASN BIT(8) /* keep command assignments (eg, var=x cmd) */
1821 #define FINUSE BIT(9) /* function being executed */
1822 #define FDELETE BIT(10) /* function deleted while it was executing */
1823 #define FKSH BIT(11) /* function defined with function x (vs x()) */
1824 #define SPEC_BI BIT(12) /* a POSIX special builtin */
1825 #define LOWER_BI BIT(13) /* (with LOW_BI) override even w/o flags */
1826 #define LOW_BI BIT(14) /* external utility overrides built-in one */
1827 #define DECL_UTIL BIT(15) /* is declaration utility */
1828 #define DECL_FWDR BIT(16) /* is declaration utility forwarder */
1829 #define NEXTLOC_BI BIT(17) /* needs BF_RESETSPEC on e->loc */
1830
1831 /*
1832 * Attributes that can be set by the user (used to decide if an unset
1833 * param should be repoted by set/typeset). Does not include ARRAY or
1834 * LOCAL.
1835 */
1836 #define USERATTRIB (EXPORT | INTEGER | RDONLY | LJUST | RJUST | ZEROFIL | \
1837 LCASEV | UCASEV_AL | INT_U | INT_L)
1838
1839 #define arrayindex(vp) ((unsigned long)((vp)->flag & AINDEX ? \
1840 (vp)->ua.index : 0))
1841
1842 enum namerefflag {
1843 SRF_NOP,
1844 SRF_ENABLE,
1845 SRF_DISABLE
1846 };
1847
1848 /* command types */
1849 #define CNONE 0 /* undefined */
1850 #define CSHELL 1 /* built-in */
1851 #define CFUNC 2 /* function */
1852 #define CEXEC 4 /* executable command */
1853 #define CALIAS 5 /* alias */
1854 #define CKEYWD 6 /* keyword */
1855 #define CTALIAS 7 /* tracked alias */
1856
1857 /* Flags for findcom()/comexec() */
1858 #define FC_SPECBI BIT(0) /* special builtin */
1859 #define FC_FUNC BIT(1) /* function */
1860 #define FC_NORMBI BIT(2) /* not special builtin */
1861 #define FC_BI (FC_SPECBI | FC_NORMBI)
1862 #define FC_PATH BIT(3) /* do path search */
1863 #define FC_DEFPATH BIT(4) /* use default path in path search */
1864 #define FC_WHENCE BIT(5) /* for use by command and whence */
1865
1866 #define AF_ARGV_ALLOC 0x1 /* argv[] array allocated */
1867 #define AF_ARGS_ALLOCED 0x2 /* argument strings allocated */
1868 #define AI_ARGV(a,i) ((i) == 0 ? (a).argv[0] : (a).argv[(i) - (a).skip])
1869 #define AI_ARGC(a) ((a).ai_argc - (a).skip)
1870
1871 /* Argument info. Used for $#, $* for shell, functions, includes, etc. */
1872 struct arg_info {
1873 const char **argv;
1874 int flags; /* AF_* */
1875 int ai_argc;
1876 int skip; /* first arg is argv[0], second is argv[1 + skip] */
1877 };
1878
1879 /*
1880 * activation record for function blocks
1881 */
1882 struct block {
1883 Area area; /* area to allocate things */
1884 const char **argv;
1885 char *error; /* error handler */
1886 char *exit; /* exit handler */
1887 struct block *next; /* enclosing block */
1888 struct table vars; /* local variables */
1889 struct table funs; /* local functions */
1890 Getopt getopts_state;
1891 int argc;
1892 int flags; /* see BF_* */
1893 };
1894
1895 /* Values for struct block.flags */
1896 #define BF_DOGETOPTS BIT(0) /* save/restore getopts state */
1897 #define BF_STOPENV BIT(1) /* do not export further */
1898 /* BF_RESETSPEC and NEXTLOC_BI must be numerically identical! */
1899 #define BF_RESETSPEC BIT(17) /* use ->next for set and shift */
1900
1901 /*
1902 * Used by ktwalk() and ktnext() routines.
1903 */
1904 struct tstate {
1905 struct tbl **next;
1906 ssize_t left;
1907 };
1908
1909 EXTERN struct table taliases; /* tracked aliases */
1910 EXTERN struct table builtins; /* built-in commands */
1911 EXTERN struct table aliases; /* aliases */
1912 EXTERN struct table keywords; /* keywords */
1913 #ifndef MKSH_NOPWNAM
1914 EXTERN struct table homedirs; /* homedir() cache */
1915 #endif
1916
1917 struct builtin {
1918 const char *name;
1919 int (*func)(const char **);
1920 };
1921
1922 extern const struct builtin mkshbuiltins[];
1923
1924 /* values for set_prompt() */
1925 #define PS1 0 /* command */
1926 #define PS2 1 /* command continuation */
1927
1928 EXTERN char *path; /* copy of either PATH or def_path */
1929 EXTERN const char *def_path; /* path to use if PATH not set */
1930 EXTERN char *tmpdir; /* TMPDIR value */
1931 EXTERN const char *prompt;
1932 EXTERN uint8_t cur_prompt; /* PS1 or PS2 */
1933 EXTERN int current_lineno; /* LINENO value */
1934
1935 /*
1936 * Description of a command or an operation on commands.
1937 */
1938 struct op {
1939 const char **args; /* arguments to a command */
1940 char **vars; /* variable assignments */
1941 struct ioword **ioact; /* IO actions (eg, < > >>) */
1942 struct op *left, *right; /* descendents */
1943 char *str; /* word for case; identifier for for,
1944 * select, and functions;
1945 * path to execute for TEXEC;
1946 * time hook for TCOM.
1947 */
1948 int lineno; /* TCOM/TFUNC: LINENO for this */
1949 short type; /* operation type, see below */
1950 /* WARNING: newtp(), tcopy() use evalflags = 0 to clear union */
1951 union {
1952 /* TCOM: arg expansion eval() flags */
1953 short evalflags;
1954 /* TFUNC: function x (vs x()) */
1955 short ksh_func;
1956 /* TPAT: termination character */
1957 char charflag;
1958 } u;
1959 };
1960
1961 /* Tree.type values */
1962 #define TEOF 0
1963 #define TCOM 1 /* command */
1964 #define TPAREN 2 /* (c-list) */
1965 #define TPIPE 3 /* a | b */
1966 #define TLIST 4 /* a ; b */
1967 #define TOR 5 /* || */
1968 #define TAND 6 /* && */
1969 #define TBANG 7 /* ! */
1970 #define TDBRACKET 8 /* [[ .. ]] */
1971 #define TFOR 9
1972 #define TSELECT 10
1973 #define TCASE 11
1974 #define TIF 12
1975 #define TWHILE 13
1976 #define TUNTIL 14
1977 #define TELIF 15
1978 #define TPAT 16 /* pattern in case */
1979 #define TBRACE 17 /* {c-list} */
1980 #define TASYNC 18 /* c & */
1981 #define TFUNCT 19 /* function name { command; } */
1982 #define TTIME 20 /* time pipeline */
1983 #define TEXEC 21 /* fork/exec eval'd TCOM */
1984 #define TCOPROC 22 /* coprocess |& */
1985
1986 /*
1987 * prefix codes for words in command tree
1988 */
1989 #define EOS 0 /* end of string */
1990 #define CHAR 1 /* unquoted character */
1991 #define QCHAR 2 /* quoted character */
1992 #define COMSUB 3 /* $() substitution (0 terminated) */
1993 #define EXPRSUB 4 /* $(()) substitution (0 terminated) */
1994 #define OQUOTE 5 /* opening " or ' */
1995 #define CQUOTE 6 /* closing " or ' */
1996 #define OSUBST 7 /* opening ${ subst (followed by { or X) */
1997 #define CSUBST 8 /* closing } of above (followed by } or X) */
1998 #define OPAT 9 /* open pattern: *(, @(, etc. */
1999 #define SPAT 10 /* separate pattern: | */
2000 #define CPAT 11 /* close pattern: ) */
2001 #define ADELIM 12 /* arbitrary delimiter: ${foo:2:3} ${foo/bar/baz} */
2002 #define FUNSUB 14 /* ${ foo;} substitution (NUL terminated) */
2003 #define VALSUB 15 /* ${|foo;} substitution (NUL terminated) */
2004 #define COMASUB 16 /* `…` substitution (COMSUB but expand aliases) */
2005 #define FUNASUB 17 /* function substitution but expand aliases */
2006
2007 /*
2008 * IO redirection
2009 */
2010 struct ioword {
2011 char *ioname; /* filename (unused if heredoc) */
2012 char *delim; /* delimiter for <<, <<- */
2013 char *heredoc; /* content of heredoc */
2014 unsigned short ioflag; /* action (below) */
2015 short unit; /* unit (fd) affected */
2016 };
2017
2018 /* ioword.flag - type of redirection */
2019 #define IOTYPE 0xF /* type: bits 0:3 */
2020 #define IOREAD 0x1 /* < */
2021 #define IOWRITE 0x2 /* > */
2022 #define IORDWR 0x3 /* <>: todo */
2023 #define IOHERE 0x4 /* << (here file) */
2024 #define IOCAT 0x5 /* >> */
2025 #define IODUP 0x6 /* <&/>& */
2026 #define IOEVAL BIT(4) /* expand in << */
2027 #define IOSKIP BIT(5) /* <<-, skip ^\t* */
2028 #define IOCLOB BIT(6) /* >|, override -o noclobber */
2029 #define IORDUP BIT(7) /* x<&y (as opposed to x>&y) */
2030 #define IODUPSELF BIT(8) /* x>&x (as opposed to x>&y) */
2031 #define IONAMEXP BIT(9) /* name has been expanded */
2032 #define IOBASH BIT(10) /* &> etc. */
2033 #define IOHERESTR BIT(11) /* <<< (here string) */
2034 #define IONDELIM BIT(12) /* null delimiter (<<) */
2035
2036 /* execute/exchild flags */
2037 #define XEXEC BIT(0) /* execute without forking */
2038 #define XFORK BIT(1) /* fork before executing */
2039 #define XBGND BIT(2) /* command & */
2040 #define XPIPEI BIT(3) /* input is pipe */
2041 #define XPIPEO BIT(4) /* output is pipe */
2042 #define XXCOM BIT(5) /* `...` command */
2043 #define XPCLOSE BIT(6) /* exchild: close close_fd in parent */
2044 #define XCCLOSE BIT(7) /* exchild: close close_fd in child */
2045 #define XERROK BIT(8) /* non-zero exit ok (for set -e) */
2046 #define XCOPROC BIT(9) /* starting a co-process */
2047 #define XTIME BIT(10) /* timing TCOM command */
2048 #define XPIPEST BIT(11) /* want PIPESTATUS */
2049
2050 /*
2051 * flags to control expansion of words (assumed by t->evalflags to fit
2052 * in a short)
2053 */
2054 #define DOBLANK BIT(0) /* perform blank interpretation */
2055 #define DOGLOB BIT(1) /* expand [?* */
2056 #define DOPAT BIT(2) /* quote *?[ */
2057 #define DOTILDE BIT(3) /* normal ~ expansion (first char) */
2058 #define DONTRUNCOMMAND BIT(4) /* do not run $(command) things */
2059 #define DOASNTILDE BIT(5) /* assignment ~ expansion (after =, :) */
2060 #define DOBRACE BIT(6) /* used by expand(): do brace expansion */
2061 #define DOMAGIC BIT(7) /* used by expand(): string contains MAGIC */
2062 #define DOTEMP BIT(8) /* dito: in word part of ${..[%#=?]..} */
2063 #define DOVACHECK BIT(9) /* var assign check (for typeset, set, etc) */
2064 #define DOMARKDIRS BIT(10) /* force markdirs behaviour */
2065 #define DOTCOMEXEC BIT(11) /* not an eval flag, used by sh -c hack */
2066 #define DOSCALAR BIT(12) /* change field handling to non-list context */
2067 #define DOHEREDOC BIT(13) /* change scalar handling to heredoc body */
2068 #define DOHERESTR BIT(14) /* append a newline char */
2069 #define DODBMAGIC BIT(15) /* add magic to expansions for [[ x = $y ]] */
2070
2071 #define X_EXTRA 20 /* this many extra bytes in X string */
2072 #if defined(MKSH_SMALL) && !defined(MKSH_SMALL_BUT_FAST)
2073 #define X_WASTE 15 /* allowed extra bytes to avoid shrinking, */
2074 #else
2075 #define X_WASTE 255 /* … must be 2ⁿ-1 */
2076 #endif
2077
2078 typedef struct XString {
2079 /* beginning of string */
2080 char *beg;
2081 /* length of allocated area, minus safety margin */
2082 size_t len;
2083 /* end of string */
2084 char *end;
2085 /* memory area used */
2086 Area *areap;
2087 } XString;
2088
2089 /* initialise expandable string */
2090 #define XinitN(xs,length,area) do { \
2091 (xs).len = (length); \
2092 (xs).areap = (area); \
2093 (xs).beg = alloc((xs).len + X_EXTRA, (xs).areap); \
2094 (xs).end = (xs).beg + (xs).len; \
2095 } while (/* CONSTCOND */ 0)
2096 #define Xinit(xs,xp,length,area) do { \
2097 XinitN((xs), (length), (area)); \
2098 (xp) = (xs).beg; \
2099 } while (/* CONSTCOND */ 0)
2100
2101 /* stuff char into string */
2102 #define Xput(xs,xp,c) (*xp++ = (c))
2103
2104 /* check if there are at least n bytes left */
2105 #define XcheckN(xs,xp,n) do { \
2106 ssize_t more = ((xp) + (n)) - (xs).end; \
2107 if (more > 0) \
2108 (xp) = Xcheck_grow(&(xs), (xp), (size_t)more); \
2109 } while (/* CONSTCOND */ 0)
2110
2111 /* check for overflow, expand string */
2112 #define Xcheck(xs,xp) XcheckN((xs), (xp), 1)
2113
2114 /* free string */
2115 #define Xfree(xs,xp) afree((xs).beg, (xs).areap)
2116
2117 /* close, return string */
2118 #define Xclose(xs,xp) aresize((xs).beg, (xp) - (xs).beg, (xs).areap)
2119
2120 /* beginning of string */
2121 #define Xstring(xs,xp) ((xs).beg)
2122
2123 #define Xnleft(xs,xp) ((xs).end - (xp)) /* may be less than 0 */
2124 #define Xlength(xs,xp) ((xp) - (xs).beg)
2125 #define Xsize(xs,xp) ((xs).end - (xs).beg)
2126 #define Xsavepos(xs,xp) ((xp) - (xs).beg)
2127 #define Xrestpos(xs,xp,n) ((xs).beg + (n))
2128
2129 char *Xcheck_grow(XString *, const char *, size_t);
2130
2131 /*
2132 * expandable vector of generic pointers
2133 */
2134
2135 typedef struct {
2136 /* beginning of allocated area */
2137 void **beg;
2138 /* currently used number of entries */
2139 size_t len;
2140 /* allocated number of entries */
2141 size_t siz;
2142 } XPtrV;
2143
2144 #define XPinit(x,n) do { \
2145 (x).siz = (n); \
2146 (x).len = 0; \
2147 (x).beg = alloc2((x).siz, sizeof(void *), ATEMP); \
2148 } while (/* CONSTCOND */ 0) \
2149
2150 #define XPput(x,p) do { \
2151 if ((x).len == (x).siz) { \
2152 (x).beg = aresize2((x).beg, (x).siz, \
2153 2 * sizeof(void *), ATEMP); \
2154 (x).siz <<= 1; \
2155 } \
2156 (x).beg[(x).len++] = (p); \
2157 } while (/* CONSTCOND */ 0)
2158
2159 #define XPptrv(x) ((x).beg)
2160 #define XPsize(x) ((x).len)
2161 #define XPclose(x) aresize2((x).beg, XPsize(x), sizeof(void *), ATEMP)
2162 #define XPfree(x) afree((x).beg, ATEMP)
2163
2164 /* for print_columns */
2165
2166 struct columnise_opts {
2167 struct shf *shf;
2168 char linesep;
2169 bool do_last;
2170 bool prefcol;
2171 };
2172
2173 /*
2174 * Lexer internals
2175 */
2176
2177 typedef struct source Source;
2178 struct source {
2179 /* input buffer */
2180 XString xs;
2181 /* memory area, also checked in reclaim() */
2182 Area *areap;
2183 /* stacked source */
2184 Source *next;
2185 /* input pointer */
2186 const char *str;
2187 /* start of current buffer */
2188 const char *start;
2189 /* input file name */
2190 const char *file;
2191 /* extra data */
2192 union {
2193 /* string[] */
2194 const char **strv;
2195 /* shell file */
2196 struct shf *shf;
2197 /* alias (SF_HASALIAS) */
2198 struct tbl *tblp;
2199 /* (also for SREREAD) */
2200 char *freeme;
2201 } u;
2202 /* flags */
2203 int flags;
2204 /* input type */
2205 int type;
2206 /* line number */
2207 int line;
2208 /* line the error occurred on (0 if not set) */
2209 int errline;
2210 /* buffer for ungetsc() (SREREAD) and alias (SALIAS) */
2211 char ugbuf[2];
2212 };
2213
2214 /* Source.type values */
2215 #define SEOF 0 /* input EOF */
2216 #define SFILE 1 /* file input */
2217 #define SSTDIN 2 /* read stdin */
2218 #define SSTRING 3 /* string */
2219 #define SWSTR 4 /* string without \n */
2220 #define SWORDS 5 /* string[] */
2221 #define SWORDSEP 6 /* string[] separator */
2222 #define SALIAS 7 /* alias expansion */
2223 #define SREREAD 8 /* read ahead to be re-scanned */
2224 #define SSTRINGCMDLINE 9 /* string from "mksh -c ..." */
2225
2226 /* Source.flags values */
2227 #define SF_ECHO BIT(0) /* echo input to shlout */
2228 #define SF_ALIAS BIT(1) /* faking space at end of alias */
2229 #define SF_ALIASEND BIT(2) /* faking space at end of alias */
2230 #define SF_TTY BIT(3) /* type == SSTDIN & it is a tty */
2231 #define SF_HASALIAS BIT(4) /* u.tblp valid (SALIAS, SEOF) */
2232 #define SF_MAYEXEC BIT(5) /* special sh -c optimisation hack */
2233
2234 typedef union {
2235 int i;
2236 char *cp;
2237 char **wp;
2238 struct op *o;
2239 struct ioword *iop;
2240 } YYSTYPE;
2241
2242 /* If something is added here, add it to tokentab[] in syn.c as well */
2243 #define LWORD 256
2244 #define LOGAND 257 /* && */
2245 #define LOGOR 258 /* || */
2246 #define BREAK 259 /* ;; */
2247 #define IF 260
2248 #define THEN 261
2249 #define ELSE 262
2250 #define ELIF 263
2251 #define FI 264
2252 #define CASE 265
2253 #define ESAC 266
2254 #define FOR 267
2255 #define SELECT 268
2256 #define WHILE 269
2257 #define UNTIL 270
2258 #define DO 271
2259 #define DONE 272
2260 #define IN 273
2261 #define FUNCTION 274
2262 #define TIME 275
2263 #define REDIR 276
2264 #define MDPAREN 277 /* (( )) */
2265 #define BANG 278 /* ! */
2266 #define DBRACKET 279 /* [[ .. ]] */
2267 #define COPROC 280 /* |& */
2268 #define BRKEV 281 /* ;| */
2269 #define BRKFT 282 /* ;& */
2270 #define YYERRCODE 300
2271
2272 /* flags to yylex */
2273 #define CONTIN BIT(0) /* skip new lines to complete command */
2274 #define ONEWORD BIT(1) /* single word for substitute() */
2275 #define ALIAS BIT(2) /* recognise alias */
2276 #define KEYWORD BIT(3) /* recognise keywords */
2277 #define LETEXPR BIT(4) /* get expression inside (( )) */
2278 #define CMDASN BIT(5) /* parse x[1 & 2] as one word, for typeset */
2279 #define HEREDOC BIT(6) /* parsing a here document body */
2280 #define ESACONLY BIT(7) /* only accept esac keyword */
2281 #define CMDWORD BIT(8) /* parsing simple command (alias related) */
2282 #define HEREDELIM BIT(9) /* parsing <<,<<- delimiter */
2283 #define LQCHAR BIT(10) /* source string contains QCHAR */
2284
2285 #define HERES 10 /* max number of << in line */
2286
2287 #ifdef MKSH_EBCDIC
2288 #define CTRL_AT (0x00U)
2289 #define CTRL_A (0x01U)
2290 #define CTRL_B (0x02U)
2291 #define CTRL_C (0x03U)
2292 #define CTRL_D (0x37U)
2293 #define CTRL_E (0x2DU)
2294 #define CTRL_F (0x2EU)
2295 #define CTRL_G (0x2FU)
2296 #define CTRL_H (0x16U)
2297 #define CTRL_I (0x05U)
2298 #define CTRL_J (0x15U)
2299 #define CTRL_K (0x0BU)
2300 #define CTRL_L (0x0CU)
2301 #define CTRL_M (0x0DU)
2302 #define CTRL_N (0x0EU)
2303 #define CTRL_O (0x0FU)
2304 #define CTRL_P (0x10U)
2305 #define CTRL_Q (0x11U)
2306 #define CTRL_R (0x12U)
2307 #define CTRL_S (0x13U)
2308 #define CTRL_T (0x3CU)
2309 #define CTRL_U (0x3DU)
2310 #define CTRL_V (0x32U)
2311 #define CTRL_W (0x26U)
2312 #define CTRL_X (0x18U)
2313 #define CTRL_Y (0x19U)
2314 #define CTRL_Z (0x3FU)
2315 #define CTRL_BO (0x27U)
2316 #define CTRL_BK (0x1CU)
2317 #define CTRL_BC (0x1DU)
2318 #define CTRL_CA (0x1EU)
2319 #define CTRL_US (0x1FU)
2320 #define CTRL_QM (0x07U)
2321 #else
2322 #define CTRL_AT (0x00U)
2323 #define CTRL_A (0x01U)
2324 #define CTRL_B (0x02U)
2325 #define CTRL_C (0x03U)
2326 #define CTRL_D (0x04U)
2327 #define CTRL_E (0x05U)
2328 #define CTRL_F (0x06U)
2329 #define CTRL_G (0x07U)
2330 #define CTRL_H (0x08U)
2331 #define CTRL_I (0x09U)
2332 #define CTRL_J (0x0AU)
2333 #define CTRL_K (0x0BU)
2334 #define CTRL_L (0x0CU)
2335 #define CTRL_M (0x0DU)
2336 #define CTRL_N (0x0EU)
2337 #define CTRL_O (0x0FU)
2338 #define CTRL_P (0x10U)
2339 #define CTRL_Q (0x11U)
2340 #define CTRL_R (0x12U)
2341 #define CTRL_S (0x13U)
2342 #define CTRL_T (0x14U)
2343 #define CTRL_U (0x15U)
2344 #define CTRL_V (0x16U)
2345 #define CTRL_W (0x17U)
2346 #define CTRL_X (0x18U)
2347 #define CTRL_Y (0x19U)
2348 #define CTRL_Z (0x1AU)
2349 #define CTRL_BO (0x1BU)
2350 #define CTRL_BK (0x1CU)
2351 #define CTRL_BC (0x1DU)
2352 #define CTRL_CA (0x1EU)
2353 #define CTRL_US (0x1FU)
2354 #define CTRL_QM (0x7FU)
2355 #endif
2356
2357 #define IDENT 64
2358
2359 EXTERN Source *source; /* yyparse/yylex source */
2360 EXTERN YYSTYPE yylval; /* result from yylex */
2361 EXTERN struct ioword *heres[HERES], **herep;
2362 EXTERN char ident[IDENT + 1];
2363
2364 EXTERN char **history; /* saved commands */
2365 EXTERN char **histptr; /* last history item */
2366 EXTERN mksh_ari_t histsize; /* history size */
2367
2368 /* flags to histsave */
2369 #define HIST_FLUSH 0
2370 #define HIST_QUEUE 1
2371 #define HIST_APPEND 2
2372 #define HIST_STORE 3
2373 #define HIST_NOTE 4
2374
2375 /* user and system time of last j_waitjed job */
2376 EXTERN struct timeval j_usrtime, j_systime;
2377
2378 #define notok2mul(max,val,c) (((val) != 0) && ((c) != 0) && \
2379 (((max) / (c)) < (val)))
2380 #define notok2add(max,val,c) ((val) > ((max) - (c)))
2381 #define notoktomul(val,cnst) notok2mul(SIZE_MAX, (val), (cnst))
2382 #define notoktoadd(val,cnst) notok2add(SIZE_MAX, (val), (cnst))
2383 #define checkoktoadd(val,cnst) do { \
2384 if (notoktoadd((val), (cnst))) \
2385 internal_errorf(Tintovfl, (size_t)(val), \
2386 '+', (size_t)(cnst)); \
2387 } while (/* CONSTCOND */ 0)
2388
2389
2390 /* lalloc.c */
2391 void ainit(Area *);
2392 void afreeall(Area *);
2393 /* these cannot fail and can take NULL (not for ap) */
2394 #define alloc(n,ap) aresize(NULL, (n), (ap))
2395 #define alloc2(m,n,ap) aresize2(NULL, (m), (n), (ap))
2396 void *aresize(void *, size_t, Area *);
2397 void *aresize2(void *, size_t, size_t, Area *);
2398 void afree(void *, Area *); /* can take NULL */
2399 #define aresizeif(z,p,n,ap) (((p) == NULL) || ((z) < (n)) || \
2400 (((z) & ~X_WASTE) > ((n) & ~X_WASTE)) ? \
2401 aresize((p), (n), (ap)) : (p))
2402 /* edit.c */
2403 #ifndef MKSH_NO_CMDLINE_EDITING
2404 int x_bind(const char * SMALLP(bool));
2405 int x_bind_check(void);
2406 int x_bind_list(void);
2407 int x_bind_showall(void);
2408 void x_init(void);
2409 #ifdef DEBUG_LEAKS
2410 void x_done(void);
2411 #endif
2412 int x_read(char *);
2413 #endif
2414 void x_mkraw(int, mksh_ttyst *, bool);
2415 void x_initterm(const char *);
2416 /* eval.c */
2417 char *substitute(const char *, int);
2418 char **eval(const char **, int);
2419 char *evalstr(const char *cp, int);
2420 char *evalonestr(const char *cp, int);
2421 char *debunk(char *, const char *, size_t);
2422 void expand(const char *, XPtrV *, int);
2423 int glob_str(char *, XPtrV *, bool);
2424 char *do_tilde(char *);
2425 /* exec.c */
2426 int execute(struct op * volatile, volatile int, volatile int * volatile);
2427 int c_builtin(const char **);
2428 struct tbl *get_builtin(const char *);
2429 struct tbl *findfunc(const char *, uint32_t, bool);
2430 int define(const char *, struct op *);
2431 const char *builtin(const char *, int (*)(const char **));
2432 struct tbl *findcom(const char *, int);
2433 void flushcom(bool);
2434 int search_access(const char *, int);
2435 const char *search_path(const char *, const char *, int, int *);
2436 void pr_menu(const char * const *);
2437 void pr_list(struct columnise_opts *, char * const *);
2438 int herein(struct ioword *, char **);
2439 /* expr.c */
2440 int evaluate(const char *, mksh_ari_t *, int, bool);
2441 int v_evaluate(struct tbl *, const char *, volatile int, bool);
2442 /* UTF-8 stuff */
2443 size_t utf_mbtowc(unsigned int *, const char *);
2444 size_t utf_wctomb(char *, unsigned int);
2445 int utf_widthadj(const char *, const char **);
2446 size_t utf_mbswidth(const char *) MKSH_A_PURE;
2447 const char *utf_skipcols(const char *, int, int *);
2448 size_t utf_ptradj(const char *) MKSH_A_PURE;
2449 #ifdef MIRBSD_BOOTFLOPPY
2450 #define utf_wcwidth(i) wcwidth((wchar_t)(i))
2451 #else
2452 int utf_wcwidth(unsigned int) MKSH_A_PURE;
2453 #endif
2454 int ksh_access(const char *, int);
2455 struct tbl *tempvar(const char *);
2456 /* funcs.c */
2457 int c_hash(const char **);
2458 int c_pwd(const char **);
2459 int c_print(const char **);
2460 #ifdef MKSH_PRINTF_BUILTIN
2461 int c_printf(const char **);
2462 #endif
2463 int c_whence(const char **);
2464 int c_command(const char **);
2465 int c_typeset(const char **);
2466 bool valid_alias_name(const char *);
2467 int c_alias(const char **);
2468 int c_unalias(const char **);
2469 int c_let(const char **);
2470 int c_jobs(const char **);
2471 #ifndef MKSH_UNEMPLOYED
2472 int c_fgbg(const char **);
2473 #endif
2474 int c_kill(const char **);
2475 void getopts_reset(int);
2476 int c_getopts(const char **);
2477 #ifndef MKSH_NO_CMDLINE_EDITING
2478 int c_bind(const char **);
2479 #endif
2480 int c_shift(const char **);
2481 int c_umask(const char **);
2482 int c_dot(const char **);
2483 int c_wait(const char **);
2484 int c_read(const char **);
2485 int c_eval(const char **);
2486 int c_trap(const char **);
2487 int c_brkcont(const char **);
2488 int c_exitreturn(const char **);
2489 int c_set(const char **);
2490 int c_unset(const char **);
2491 int c_ulimit(const char **);
2492 int c_times(const char **);
2493 int timex(struct op *, int, volatile int *);
2494 void timex_hook(struct op *, char ** volatile *);
2495 int c_exec(const char **);
2496 int c_test(const char **);
2497 #if HAVE_MKNOD
2498 int c_mknod(const char **);
2499 #endif
2500 int c_realpath(const char **);
2501 int c_rename(const char **);
2502 int c_cat(const char **);
2503 int c_sleep(const char **);
2504 /* histrap.c */
2505 void init_histvec(void);
2506 void hist_init(Source *);
2507 #if HAVE_PERSISTENT_HISTORY
2508 void hist_finish(void);
2509 #endif
2510 void histsave(int *, const char *, int, bool);
2511 #if !defined(MKSH_SMALL) && HAVE_PERSISTENT_HISTORY
2512 bool histsync(void);
2513 #endif
2514 int c_fc(const char **);
2515 void sethistsize(mksh_ari_t);
2516 #if HAVE_PERSISTENT_HISTORY
2517 void sethistfile(const char *);
2518 #endif
2519 #if !defined(MKSH_NO_CMDLINE_EDITING) && !MKSH_S_NOVI
2520 char **histpos(void) MKSH_A_PURE;
2521 int histnum(int);
2522 #endif
2523 int findhist(int, const char *, bool, bool) MKSH_A_PURE;
2524 char **hist_get_newest(bool);
2525 void inittraps(void);
2526 void alarm_init(void);
2527 Trap *gettrap(const char *, bool, bool);
2528 void trapsig(int);
2529 void intrcheck(void);
2530 int fatal_trap_check(void);
2531 int trap_pending(void);
2532 void runtraps(int intr);
2533 void runtrap(Trap *, bool);
2534 void cleartraps(void);
2535 void restoresigs(void);
2536 void settrap(Trap *, const char *);
2537 bool block_pipe(void);
2538 void restore_pipe(void);
2539 int setsig(Trap *, sig_t, int);
2540 void setexecsig(Trap *, int);
2541 #if HAVE_FLOCK || HAVE_LOCK_FCNTL
2542 void mksh_lockfd(int);
2543 void mksh_unlkfd(int);
2544 #endif
2545 /* jobs.c */
2546 void j_init(void);
2547 void j_exit(void);
2548 #ifndef MKSH_UNEMPLOYED
2549 void j_change(void);
2550 #endif
2551 int exchild(struct op *, int, volatile int *, int);
2552 void startlast(void);
2553 int waitlast(void);
2554 int waitfor(const char *, int *);
2555 int j_kill(const char *, int);
2556 #ifndef MKSH_UNEMPLOYED
2557 int j_resume(const char *, int);
2558 #endif
2559 #if !defined(MKSH_UNEMPLOYED) && HAVE_GETSID
2560 void j_suspend(void);
2561 #endif
2562 int j_jobs(const char *, int, int);
2563 void j_notify(void);
2564 pid_t j_async(void);
2565 int j_stopped_running(void);
2566 /* lex.c */
2567 int yylex(int);
2568 void yyskiputf8bom(void);
2569 void yyerror(const char *, ...)
2570 MKSH_A_NORETURN
2571 MKSH_A_FORMAT(__printf__, 1, 2);
2572 Source *pushs(int, Area *);
2573 void set_prompt(int, Source *);
2574 int pprompt(const char *, int);
2575 /* main.c */
2576 int include(const char *, int, const char **, bool);
2577 int command(const char *, int);
2578 int shell(Source * volatile, volatile int);
2579 /* argument MUST NOT be 0 */
2580 void unwind(int) MKSH_A_NORETURN;
2581 void newenv(int);
2582 void quitenv(struct shf *);
2583 void cleanup_parents_env(void);
2584 void cleanup_proc_env(void);
2585 void errorf(const char *, ...)
2586 MKSH_A_NORETURN
2587 MKSH_A_FORMAT(__printf__, 1, 2);
2588 void errorfx(int, const char *, ...)
2589 MKSH_A_NORETURN
2590 MKSH_A_FORMAT(__printf__, 2, 3);
2591 void warningf(bool, const char *, ...)
2592 MKSH_A_FORMAT(__printf__, 2, 3);
2593 void bi_errorf(const char *, ...)
2594 MKSH_A_FORMAT(__printf__, 1, 2);
2595 void maybe_errorf(int *, int, const char *, ...)
2596 MKSH_A_FORMAT(__printf__, 3, 4);
2597 #define errorfz() errorf(NULL)
2598 #define errorfxz(rc) errorfx((rc), NULL)
2599 #define bi_errorfz() bi_errorf(NULL)
2600 void internal_errorf(const char *, ...)
2601 MKSH_A_NORETURN
2602 MKSH_A_FORMAT(__printf__, 1, 2);
2603 void internal_warningf(const char *, ...)
2604 MKSH_A_FORMAT(__printf__, 1, 2);
2605 void error_prefix(bool);
2606 void shellf(const char *, ...)
2607 MKSH_A_FORMAT(__printf__, 1, 2);
2608 void shprintf(const char *, ...)
2609 MKSH_A_FORMAT(__printf__, 1, 2);
2610 int can_seek(int);
2611 void initio(void);
2612 void recheck_ctype(void);
2613 int ksh_dup2(int, int, bool);
2614 short savefd(int);
2615 void restfd(int, int);
2616 void openpipe(int *);
2617 void closepipe(int *);
2618 int check_fd(const char *, int, const char **);
2619 void coproc_init(void);
2620 void coproc_read_close(int);
2621 void coproc_readw_close(int);
2622 void coproc_write_close(int);
2623 int coproc_getfd(int, const char **);
2624 void coproc_cleanup(int);
2625 struct temp *maketemp(Area *, Temp_type, struct temp **);
2626 void ktinit(Area *, struct table *, uint8_t);
2627 struct tbl *ktscan(struct table *, const char *, uint32_t, struct tbl ***);
2628 /* table, name (key) to search for, hash(n) */
2629 #define ktsearch(tp,s,h) ktscan((tp), (s), (h), NULL)
2630 struct tbl *ktenter(struct table *, const char *, uint32_t);
2631 #define ktdelete(p) do { p->flag = 0; } while (/* CONSTCOND */ 0)
2632 void ktwalk(struct tstate *, struct table *);
2633 struct tbl *ktnext(struct tstate *);
2634 struct tbl **ktsort(struct table *);
2635 #ifdef DF
2636 void DF(const char *, ...)
2637 MKSH_A_FORMAT(__printf__, 1, 2);
2638 #endif
2639 /* misc.c */
2640 size_t option(const char *) MKSH_A_PURE;
2641 char *getoptions(void);
2642 void change_flag(enum sh_flag, int, bool);
2643 void change_xtrace(unsigned char, bool);
2644 int parse_args(const char **, int, bool *);
2645 int getn(const char *, int *);
2646 int gmatchx(const char *, const char *, bool);
2647 bool has_globbing(const char *) MKSH_A_PURE;
2648 int ascstrcmp(const void *, const void *) MKSH_A_PURE;
2649 int ascpstrcmp(const void *, const void *) MKSH_A_PURE;
2650 void ksh_getopt_reset(Getopt *, int);
2651 int ksh_getopt(const char **, Getopt *, const char *);
2652 void print_value_quoted(struct shf *, const char *);
2653 char *quote_value(const char *);
2654 void print_columns(struct columnise_opts *, unsigned int,
2655 void (*)(char *, size_t, unsigned int, const void *),
2656 const void *, size_t, size_t);
2657 void strip_nuls(char *, size_t)
2658 MKSH_A_BOUNDED(__string__, 1, 2);
2659 ssize_t blocking_read(int, char *, size_t)
2660 MKSH_A_BOUNDED(__buffer__, 2, 3);
2661 int reset_nonblock(int);
2662 char *ksh_get_wd(void);
2663 char *do_realpath(const char *);
2664 void simplify_path(char *);
2665 void set_current_wd(const char *);
2666 int c_cd(const char **);
2667 #if defined(MKSH_SMALL) && !defined(MKSH_SMALL_BUT_FAST)
2668 char *strdup_i(const char *, Area *);
2669 char *strndup_i(const char *, size_t, Area *);
2670 #endif
2671 int unbksl(bool, int (*)(void), void (*)(int));
2672 #ifdef __OS2__
2673 /* os2.c */
2674 void os2_init(int *, const char ***);
2675 void setextlibpath(const char *, const char *);
2676 int access_ex(int (*)(const char *, int), const char *, int);
2677 int stat_ex(int (*)(const char *, struct stat *), const char *, struct stat *);
2678 const char *real_exec_name(const char *);
2679 #endif
2680 /* shf.c */
2681 struct shf *shf_open(const char *, int, int, int);
2682 struct shf *shf_fdopen(int, int, struct shf *);
2683 struct shf *shf_reopen(int, int, struct shf *);
2684 struct shf *shf_sopen(char *, ssize_t, int, struct shf *);
2685 int shf_close(struct shf *);
2686 int shf_fdclose(struct shf *);
2687 char *shf_sclose(struct shf *);
2688 int shf_flush(struct shf *);
2689 ssize_t shf_read(char *, ssize_t, struct shf *);
2690 char *shf_getse(char *, ssize_t, struct shf *);
2691 int shf_getchar(struct shf *s);
2692 int shf_ungetc(int, struct shf *);
2693 #ifdef MKSH_SHF_NO_INLINE
2694 int shf_getc(struct shf *);
2695 int shf_putc(int, struct shf *);
2696 #else
2697 #define shf_getc shf_getc_i
2698 #define shf_putc shf_putc_i
2699 #endif
2700 int shf_putchar(int, struct shf *);
2701 ssize_t shf_puts(const char *, struct shf *);
2702 ssize_t shf_write(const char *, ssize_t, struct shf *);
2703 ssize_t shf_fprintf(struct shf *, const char *, ...)
2704 MKSH_A_FORMAT(__printf__, 2, 3);
2705 ssize_t shf_snprintf(char *, ssize_t, const char *, ...)
2706 MKSH_A_FORMAT(__printf__, 3, 4)
2707 MKSH_A_BOUNDED(__string__, 1, 2);
2708 char *shf_smprintf(const char *, ...)
2709 MKSH_A_FORMAT(__printf__, 1, 2);
2710 ssize_t shf_vfprintf(struct shf *, const char *, va_list)
2711 MKSH_A_FORMAT(__printf__, 2, 0);
2712 void set_ifs(const char *);
2713 /* syn.c */
2714 void initkeywords(void);
2715 struct op *compile(Source *, bool, bool);
2716 bool parse_usec(const char *, struct timeval *);
2717 char *yyrecursive(int);
2718 void yyrecursive_pop(bool);
2719 /* tree.c */
2720 void fptreef(struct shf *, int, const char *, ...);
2721 char *snptreef(char *, ssize_t, const char *, ...);
2722 struct op *tcopy(struct op *, Area *);
2723 char *wdcopy(const char *, Area *);
2724 const char *wdscan(const char *, int);
2725 #define WDS_TPUTS BIT(0) /* tputS (dumpwdvar) mode */
2726 char *wdstrip(const char *, int);
2727 void tfree(struct op *, Area *);
2728 void dumpchar(struct shf *, unsigned char);
2729 void dumptree(struct shf *, struct op *);
2730 void dumpwdvar(struct shf *, const char *);
2731 void dumpioact(struct shf *shf, struct op *t);
2732 void vistree(char *, size_t, struct op *)
2733 MKSH_A_BOUNDED(__string__, 1, 2);
2734 void fpFUNCTf(struct shf *, int, bool, const char *, struct op *);
2735 /* var.c */
2736 void newblock(void);
2737 void popblock(void);
2738 void initvar(void);
2739 struct block *varsearch(struct block *, struct tbl **, const char *, uint32_t);
2740 struct tbl *global(const char *);
2741 struct tbl *isglobal(const char *, bool);
2742 struct tbl *local(const char *, bool);
2743 char *str_val(struct tbl *);
2744 int setstr(struct tbl *, const char *, int);
2745 struct tbl *setint_v(struct tbl *, struct tbl *, bool);
2746 void setint(struct tbl *, mksh_ari_t);
2747 void setint_n(struct tbl *, mksh_ari_t, int);
2748 struct tbl *typeset(const char *, uint32_t, uint32_t, int, int);
2749 void unset(struct tbl *, int);
2750 const char *skip_varname(const char *, bool) MKSH_A_PURE;
2751 const char *skip_wdvarname(const char *, bool) MKSH_A_PURE;
2752 int is_wdvarname(const char *, bool) MKSH_A_PURE;
2753 int is_wdvarassign(const char *) MKSH_A_PURE;
2754 struct tbl *arraysearch(struct tbl *, uint32_t);
2755 char **makenv(void);
2756 void change_winsz(void);
2757 size_t array_ref_len(const char *) MKSH_A_PURE;
2758 char *arrayname(const char *);
2759 mksh_uari_t set_array(const char *, bool, const char **);
2760 uint32_t hash(const void *) MKSH_A_PURE;
2761 uint32_t chvt_rndsetup(const void *, size_t) MKSH_A_PURE;
2762 mksh_ari_t rndget(void);
2763 void rndset(unsigned long);
2764 void rndpush(const void *);
2765 void record_match(const char *);
2766
2767 enum Test_op {
2768 /* non-operator */
2769 TO_NONOP = 0,
2770 /* unary operators */
2771 TO_STNZE, TO_STZER, TO_ISSET, TO_OPTION,
2772 TO_FILAXST,
2773 TO_FILEXST,
2774 TO_FILREG, TO_FILBDEV, TO_FILCDEV, TO_FILSYM, TO_FILFIFO, TO_FILSOCK,
2775 TO_FILCDF, TO_FILID, TO_FILGID, TO_FILSETG, TO_FILSTCK, TO_FILUID,
2776 TO_FILRD, TO_FILGZ, TO_FILTT, TO_FILSETU, TO_FILWR, TO_FILEX,
2777 /* binary operators */
2778 TO_STEQL, TO_STNEQ, TO_STLT, TO_STGT, TO_INTEQ, TO_INTNE, TO_INTGT,
2779 TO_INTGE, TO_INTLT, TO_INTLE, TO_FILEQ, TO_FILNT, TO_FILOT,
2780 /* not an operator */
2781 TO_NONNULL /* !TO_NONOP */
2782 };
2783 typedef enum Test_op Test_op;
2784
2785 /* Used by Test_env.isa() (order important - used to index *_tokens[] arrays) */
2786 enum Test_meta {
2787 TM_OR, /* -o or || */
2788 TM_AND, /* -a or && */
2789 TM_NOT, /* ! */
2790 TM_OPAREN, /* ( */
2791 TM_CPAREN, /* ) */
2792 TM_UNOP, /* unary operator */
2793 TM_BINOP, /* binary operator */
2794 TM_END /* end of input */
2795 };
2796 typedef enum Test_meta Test_meta;
2797
2798 struct t_op {
2799 const char op_text[4];
2800 Test_op op_num;
2801 };
2802
2803 /* for string reuse */
2804 extern const struct t_op u_ops[];
2805 extern const struct t_op b_ops[];
2806 /* ensure order with funcs.c */
2807 #define Tda (u_ops[0].op_text)
2808 #define Tdn (u_ops[12].op_text)
2809 #define Tdo (u_ops[14].op_text)
2810 #define Tdr (u_ops[16].op_text)
2811 #define Tdu (u_ops[20].op_text) /* "-u" */
2812 #define Tdx (u_ops[23].op_text)
2813
2814 #define Tu (Tdu + 1) /* "u" */
2815
2816 #define TEF_ERROR BIT(0) /* set if we've hit an error */
2817 #define TEF_DBRACKET BIT(1) /* set if [[ .. ]] test */
2818
2819 typedef struct test_env {
2820 union {
2821 const char **wp; /* used by ptest_* */
2822 XPtrV *av; /* used by dbtestp_* */
2823 } pos;
2824 const char **wp_end; /* used by ptest_* */
2825 Test_op (*isa)(struct test_env *, Test_meta);
2826 const char *(*getopnd) (struct test_env *, Test_op, bool);
2827 int (*eval)(struct test_env *, Test_op, const char *, const char *, bool);
2828 void (*error)(struct test_env *, int, const char *);
2829 int flags; /* TEF_* */
2830 } Test_env;
2831
2832 extern const char * const dbtest_tokens[];
2833
2834 Test_op test_isop(Test_meta, const char *) MKSH_A_PURE;
2835 int test_eval(Test_env *, Test_op, const char *, const char *, bool);
2836 int test_parse(Test_env *);
2837
2838 /* tty_fd is not opened O_BINARY, it's thus never read/written */
2839 EXTERN int tty_fd E_INIT(-1); /* dup'd tty file descriptor */
2840 EXTERN bool tty_devtty; /* true if tty_fd is from /dev/tty */
2841 EXTERN mksh_ttyst tty_state; /* saved tty state */
2842 EXTERN bool tty_hasstate; /* true if tty_state is valid */
2843
2844 extern int tty_init_fd(void); /* initialise tty_fd, tty_devtty */
2845
2846 #ifdef __OS2__
2847 #define binopen2(path,flags) __extension__({ \
2848 int binopen2_fd = open((path), (flags) | O_BINARY); \
2849 if (binopen2_fd >= 0) \
2850 setmode(binopen2_fd, O_BINARY); \
2851 (binopen2_fd); \
2852 })
2853 #define binopen3(path,flags,mode) __extension__({ \
2854 int binopen3_fd = open((path), (flags) | O_BINARY, (mode)); \
2855 if (binopen3_fd >= 0) \
2856 setmode(binopen3_fd, O_BINARY); \
2857 (binopen3_fd); \
2858 })
2859 #else
2860 #define binopen2(path,flags) open((path), (flags) | O_BINARY)
2861 #define binopen3(path,flags,mode) open((path), (flags) | O_BINARY, (mode))
2862 #endif
2863
2864 #ifdef MKSH_DOSPATH
2865 #define mksh_drvltr(s) __extension__({ \
2866 const char *mksh_drvltr_s = (s); \
2867 (ctype(mksh_drvltr_s[0], C_ALPHA) && mksh_drvltr_s[1] == ':'); \
2868 })
2869 #define mksh_abspath(s) __extension__({ \
2870 const char *mksh_abspath_s = (s); \
2871 (mksh_cdirsep(mksh_abspath_s[0]) || \
2872 (mksh_drvltr(mksh_abspath_s) && \
2873 mksh_cdirsep(mksh_abspath_s[2]))); \
2874 })
2875 #define mksh_cdirsep(c) __extension__({ \
2876 char mksh_cdirsep_c = (c); \
2877 (mksh_cdirsep_c == '/' || mksh_cdirsep_c == '\\'); \
2878 })
2879 #define mksh_sdirsep(s) strpbrk((s), "/\\")
2880 #define mksh_vdirsep(s) __extension__({ \
2881 const char *mksh_vdirsep_s = (s); \
2882 (((mksh_drvltr(mksh_vdirsep_s) && \
2883 !mksh_cdirsep(mksh_vdirsep_s[2])) ? (!0) : \
2884 (mksh_sdirsep(mksh_vdirsep_s) != NULL)) && \
2885 (strcmp(mksh_vdirsep_s, T_builtin) != 0)); \
2886 })
2887 int getdrvwd(char **, unsigned int);
2888 #else
2889 #define mksh_abspath(s) (ord((s)[0]) == ORD('/'))
2890 #define mksh_cdirsep(c) (ord(c) == ORD('/'))
2891 #define mksh_sdirsep(s) strchr((s), '/')
2892 #define mksh_vdirsep(s) vstrchr((s), '/')
2893 #endif
2894
2895 /* be sure not to interfere with anyone else's idea about EXTERN */
2896 #ifdef EXTERN_DEFINED
2897 # undef EXTERN_DEFINED
2898 # undef EXTERN
2899 #endif
2900 #undef E_INIT
2901
2902 #endif /* !MKSH_INCLUDES_ONLY */
2903