1 /* $OpenBSD: c_ksh.c,v 1.33 2009/02/07 14:03:24 kili Exp $ */
2 /* $OpenBSD: c_sh.c,v 1.41 2010/03/27 09:10:01 jmc Exp $ */
3 /* $OpenBSD: c_test.c,v 1.18 2009/03/01 20:11:06 otto Exp $ */
4 /* $OpenBSD: c_ulimit.c,v 1.17 2008/03/21 12:51:19 millert Exp $ */
5
6 /*-
7 * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
8 * 2010, 2011
9 * Thorsten Glaser <tg@mirbsd.org>
10 *
11 * Provided that these terms and disclaimer and all copyright notices
12 * are retained or reproduced in an accompanying document, permission
13 * is granted to deal in this work without restriction, including un-
14 * limited rights to use, publicly perform, distribute, sell, modify,
15 * merge, give away, or sublicence.
16 *
17 * This work is provided "AS IS" and WITHOUT WARRANTY of any kind, to
18 * the utmost extent permitted by applicable law, neither express nor
19 * implied; without malicious intent or gross negligence. In no event
20 * may a licensor, author or contributor be held liable for indirect,
21 * direct, other damage, loss, or other issues arising in any way out
22 * of dealing in the work, even if advised of the possibility of such
23 * damage or existence of a defect, except proven that it results out
24 * of said person's immediate fault when using the work as intended.
25 */
26
27 #include "sh.h"
28
29 #if HAVE_SELECT
30 #if HAVE_SYS_BSDTYPES_H
31 #include <sys/bsdtypes.h>
32 #endif
33 #if HAVE_SYS_SELECT_H
34 #include <sys/select.h>
35 #endif
36 #if HAVE_BSTRING_H
37 #include <bstring.h>
38 #endif
39 #endif
40
41 __RCSID("$MirOS: src/bin/mksh/funcs.c,v 1.197 2011/09/07 15:24:15 tg Exp $");
42
43 #if HAVE_KILLPG
44 /*
45 * use killpg if < -1 since -1 does special things
46 * for some non-killpg-endowed kills
47 */
48 #define mksh_kill(p,s) ((p) < -1 ? killpg(-(p), (s)) : kill((p), (s)))
49 #else
50 /* cross fingers and hope kill is killpg-endowed */
51 #define mksh_kill kill
52 #endif
53
54 /* XXX conditions correct? */
55 #if !defined(RLIM_INFINITY) && !defined(MKSH_NO_LIMITS)
56 #define MKSH_NO_LIMITS 1
57 #endif
58
59 #ifdef MKSH_NO_LIMITS
60 #define c_ulimit c_true
61 #endif
62
63 #if defined(ANDROID)
64 static int c_android_lsmod(const char **);
65 #endif
66
67 static int
c_true(const char ** wp MKSH_A_UNUSED)68 c_true(const char **wp MKSH_A_UNUSED)
69 {
70 return (0);
71 }
72
73 static int
c_false(const char ** wp MKSH_A_UNUSED)74 c_false(const char **wp MKSH_A_UNUSED)
75 {
76 return (1);
77 }
78
79 /*
80 * A leading = means assignments before command are kept;
81 * a leading * means a POSIX special builtin;
82 * a leading + means a POSIX regular builtin
83 * (* and + should not be combined).
84 */
85 const struct builtin mkshbuiltins[] = {
86 {"*=.", c_dot},
87 {"*=:", c_true},
88 {"[", c_test},
89 {"*=break", c_brkcont},
90 {Tgbuiltin, c_builtin},
91 {"*=continue", c_brkcont},
92 {"*=eval", c_eval},
93 {"*=exec", c_exec},
94 {"*=exit", c_exitreturn},
95 {"+false", c_false},
96 {"*=return", c_exitreturn},
97 {Tsgset, c_set},
98 {"*=shift", c_shift},
99 {"=times", c_times},
100 {"*=trap", c_trap},
101 {"+=wait", c_wait},
102 {"+read", c_read},
103 {"test", c_test},
104 {"+true", c_true},
105 {"ulimit", c_ulimit},
106 {"+umask", c_umask},
107 {"*=unset", c_unset},
108 /* no =: AT&T manual wrong */
109 {Tpalias, c_alias},
110 {"+cd", c_cd},
111 /* dash compatibility hack */
112 {"chdir", c_cd},
113 {"+command", c_command},
114 {"echo", c_print},
115 {"*=export", c_typeset},
116 {"+fc", c_fc},
117 {"+getopts", c_getopts},
118 {"=global", c_typeset},
119 {"+jobs", c_jobs},
120 {"+kill", c_kill},
121 {"let", c_let},
122 {"print", c_print},
123 #ifdef MKSH_PRINTF_BUILTIN
124 {"printf", c_printf},
125 #endif
126 {"pwd", c_pwd},
127 {"*=readonly", c_typeset},
128 {T_typeset, c_typeset},
129 {Tpunalias, c_unalias},
130 {"whence", c_whence},
131 #ifndef MKSH_UNEMPLOYED
132 {"+bg", c_fgbg},
133 {"+fg", c_fgbg},
134 #endif
135 {"bind", c_bind},
136 {"cat", c_cat},
137 #if HAVE_MKNOD
138 {"mknod", c_mknod},
139 #endif
140 {"realpath", c_realpath},
141 {"rename", c_rename},
142 #if HAVE_SELECT
143 {"sleep", c_sleep},
144 #endif
145 #ifdef __MirBSD__
146 /* alias to "true" for historical reasons */
147 {"domainname", c_true},
148 #endif
149 #if defined(ANDROID)
150 {"lsmod", c_android_lsmod},
151 #endif
152 {NULL, (int (*)(const char **))NULL}
153 };
154
155 struct kill_info {
156 int num_width;
157 int name_width;
158 };
159
160 static const struct t_op {
161 char op_text[4];
162 Test_op op_num;
163 } u_ops[] = {
164 {"-a", TO_FILAXST },
165 {"-b", TO_FILBDEV },
166 {"-c", TO_FILCDEV },
167 {"-d", TO_FILID },
168 {"-e", TO_FILEXST },
169 {"-f", TO_FILREG },
170 {"-G", TO_FILGID },
171 {"-g", TO_FILSETG },
172 {"-h", TO_FILSYM },
173 {"-H", TO_FILCDF },
174 {"-k", TO_FILSTCK },
175 {"-L", TO_FILSYM },
176 {"-n", TO_STNZE },
177 {"-O", TO_FILUID },
178 {"-o", TO_OPTION },
179 {"-p", TO_FILFIFO },
180 {"-r", TO_FILRD },
181 {"-s", TO_FILGZ },
182 {"-S", TO_FILSOCK },
183 {"-t", TO_FILTT },
184 {"-u", TO_FILSETU },
185 {"-w", TO_FILWR },
186 {"-x", TO_FILEX },
187 {"-z", TO_STZER },
188 {"", TO_NONOP }
189 };
190 static const struct t_op b_ops[] = {
191 {"=", TO_STEQL },
192 {"==", TO_STEQL },
193 {"!=", TO_STNEQ },
194 {"<", TO_STLT },
195 {">", TO_STGT },
196 {"-eq", TO_INTEQ },
197 {"-ne", TO_INTNE },
198 {"-gt", TO_INTGT },
199 {"-ge", TO_INTGE },
200 {"-lt", TO_INTLT },
201 {"-le", TO_INTLE },
202 {"-ef", TO_FILEQ },
203 {"-nt", TO_FILNT },
204 {"-ot", TO_FILOT },
205 {"", TO_NONOP }
206 };
207
208 static int test_oexpr(Test_env *, bool);
209 static int test_aexpr(Test_env *, bool);
210 static int test_nexpr(Test_env *, bool);
211 static int test_primary(Test_env *, bool);
212 static Test_op ptest_isa(Test_env *, Test_meta);
213 static const char *ptest_getopnd(Test_env *, Test_op, bool);
214 static void ptest_error(Test_env *, int, const char *);
215 static char *kill_fmt_entry(char *, size_t, int, const void *);
216 static void p_time(struct shf *, bool, long, int, int,
217 const char *, const char *)
218 MKSH_A_NONNULL((__nonnull__ (6, 7)));
219
220 int
c_pwd(const char ** wp)221 c_pwd(const char **wp)
222 {
223 int optc;
224 bool physical = tobool(Flag(FPHYSICAL));
225 char *p, *allocd = NULL;
226
227 while ((optc = ksh_getopt(wp, &builtin_opt, "LP")) != -1)
228 switch (optc) {
229 case 'L':
230 physical = false;
231 break;
232 case 'P':
233 physical = true;
234 break;
235 case '?':
236 return (1);
237 }
238 wp += builtin_opt.optind;
239
240 if (wp[0]) {
241 bi_errorf("too many arguments");
242 return (1);
243 }
244 p = current_wd[0] ? (physical ? allocd = do_realpath(current_wd) :
245 current_wd) : NULL;
246 /* LINTED use of access */
247 if (p && access(p, R_OK) < 0)
248 p = NULL;
249 if (!p && !(p = allocd = ksh_get_wd())) {
250 bi_errorf("%s: %s", "can't determine current directory",
251 strerror(errno));
252 return (1);
253 }
254 shprintf("%s\n", p);
255 afree(allocd, ATEMP);
256 return (0);
257 }
258
259 static const char *s_ptr;
260 static int s_get(void);
261 static void s_put(int);
262
263 int
c_print(const char ** wp)264 c_print(const char **wp)
265 {
266 #define PO_NL BIT(0) /* print newline */
267 #define PO_EXPAND BIT(1) /* expand backslash sequences */
268 #define PO_PMINUSMINUS BIT(2) /* print a -- argument */
269 #define PO_HIST BIT(3) /* print to history instead of stdout */
270 #define PO_COPROC BIT(4) /* printing to coprocess: block SIGPIPE */
271 int fd = 1, c;
272 int flags = PO_EXPAND|PO_NL;
273 const char *s, *emsg;
274 XString xs;
275 char *xp;
276
277 if (wp[0][0] == 'e') {
278 /* echo builtin */
279 wp++;
280 if (Flag(FPOSIX) || Flag(FSH) || Flag(FAS_BUILTIN)) {
281 /* Debian Policy 10.4 compliant "echo" builtin */
282 if (*wp && !strcmp(*wp, "-n")) {
283 /* we recognise "-n" only as the first arg */
284 flags = 0;
285 wp++;
286 } else
287 /* otherwise, we print everything as-is */
288 flags = PO_NL;
289 } else {
290 int nflags = flags;
291
292 /**
293 * a compromise between sysV and BSD echo commands:
294 * escape sequences are enabled by default, and -n,
295 * -e and -E are recognised if they appear in argu-
296 * ments with no illegal options (ie, echo -nq will
297 * print -nq).
298 * Different from sysV echo since options are reco-
299 * gnised, different from BSD echo since escape se-
300 * quences are enabled by default.
301 */
302
303 while ((s = *wp) && *s == '-' && s[1]) {
304 while (*++s)
305 if (*s == 'n')
306 nflags &= ~PO_NL;
307 else if (*s == 'e')
308 nflags |= PO_EXPAND;
309 else if (*s == 'E')
310 nflags &= ~PO_EXPAND;
311 else
312 /*
313 * bad option: don't use
314 * nflags, print argument
315 */
316 break;
317
318 if (*s)
319 break;
320 wp++;
321 flags = nflags;
322 }
323 }
324 } else {
325 int optc;
326 const char *opts = "Rnprsu,";
327
328 while ((optc = ksh_getopt(wp, &builtin_opt, opts)) != -1)
329 switch (optc) {
330 case 'R':
331 /* fake BSD echo command */
332 flags |= PO_PMINUSMINUS;
333 flags &= ~PO_EXPAND;
334 opts = "ne";
335 break;
336 case 'e':
337 flags |= PO_EXPAND;
338 break;
339 case 'n':
340 flags &= ~PO_NL;
341 break;
342 case 'p':
343 if ((fd = coproc_getfd(W_OK, &emsg)) < 0) {
344 bi_errorf("%s: %s", "-p", emsg);
345 return (1);
346 }
347 break;
348 case 'r':
349 flags &= ~PO_EXPAND;
350 break;
351 case 's':
352 flags |= PO_HIST;
353 break;
354 case 'u':
355 if (!*(s = builtin_opt.optarg))
356 fd = 0;
357 else if ((fd = check_fd(s, W_OK, &emsg)) < 0) {
358 bi_errorf("%s: %s: %s", "-u", s, emsg);
359 return (1);
360 }
361 break;
362 case '?':
363 return (1);
364 }
365
366 if (!(builtin_opt.info & GI_MINUSMINUS)) {
367 /* treat a lone - like -- */
368 if (wp[builtin_opt.optind] &&
369 ksh_isdash(wp[builtin_opt.optind]))
370 builtin_opt.optind++;
371 } else if (flags & PO_PMINUSMINUS)
372 builtin_opt.optind--;
373 wp += builtin_opt.optind;
374 }
375
376 Xinit(xs, xp, 128, ATEMP);
377
378 while (*wp != NULL) {
379 s = *wp;
380 while ((c = *s++) != '\0') {
381 Xcheck(xs, xp);
382 if ((flags & PO_EXPAND) && c == '\\') {
383 s_ptr = s;
384 c = unbksl(false, s_get, s_put);
385 s = s_ptr;
386 if (c == -1) {
387 /* rejected by generic function */
388 switch ((c = *s++)) {
389 case 'c':
390 flags &= ~PO_NL;
391 /* AT&T brain damage */
392 continue;
393 case '\0':
394 s--;
395 c = '\\';
396 break;
397 default:
398 Xput(xs, xp, '\\');
399 }
400 } else if ((unsigned int)c > 0xFF) {
401 /* generic function returned Unicode */
402 char ts[4];
403
404 ts[utf_wctomb(ts, c - 0x100)] = 0;
405 for (c = 0; ts[c]; ++c)
406 Xput(xs, xp, ts[c]);
407 continue;
408 }
409 }
410 Xput(xs, xp, c);
411 }
412 if (*++wp != NULL)
413 Xput(xs, xp, ' ');
414 }
415 if (flags & PO_NL)
416 Xput(xs, xp, '\n');
417
418 if (flags & PO_HIST) {
419 Xput(xs, xp, '\0');
420 histsave(&source->line, Xstring(xs, xp), true, false);
421 Xfree(xs, xp);
422 } else {
423 int len = Xlength(xs, xp);
424 int opipe = 0;
425
426 /*
427 * Ensure we aren't killed by a SIGPIPE while writing to
428 * a coprocess. AT&T ksh doesn't seem to do this (seems
429 * to just check that the co-process is alive which is
430 * not enough).
431 */
432 if (coproc.write >= 0 && coproc.write == fd) {
433 flags |= PO_COPROC;
434 opipe = block_pipe();
435 }
436 for (s = Xstring(xs, xp); len > 0; ) {
437 if ((c = write(fd, s, len)) < 0) {
438 if (flags & PO_COPROC)
439 restore_pipe(opipe);
440 if (errno == EINTR) {
441 /* allow user to ^C out */
442 intrcheck();
443 if (flags & PO_COPROC)
444 opipe = block_pipe();
445 continue;
446 }
447 return (1);
448 }
449 s += c;
450 len -= c;
451 }
452 if (flags & PO_COPROC)
453 restore_pipe(opipe);
454 }
455
456 return (0);
457 }
458
459 static int
s_get(void)460 s_get(void)
461 {
462 return (*s_ptr++);
463 }
464
465 static void
s_put(int c MKSH_A_UNUSED)466 s_put(int c MKSH_A_UNUSED)
467 {
468 --s_ptr;
469 }
470
471 int
c_whence(const char ** wp)472 c_whence(const char **wp)
473 {
474 struct tbl *tp;
475 const char *id;
476 bool pflag = false, vflag = false, Vflag = false;
477 int rv = 0, optc, fcflags;
478 bool iam_whence = wp[0][0] == 'w';
479 const char *opts = iam_whence ? "pv" : "pvV";
480
481 while ((optc = ksh_getopt(wp, &builtin_opt, opts)) != -1)
482 switch (optc) {
483 case 'p':
484 pflag = true;
485 break;
486 case 'v':
487 vflag = true;
488 break;
489 case 'V':
490 Vflag = true;
491 break;
492 case '?':
493 return (1);
494 }
495 wp += builtin_opt.optind;
496
497 fcflags = FC_BI | FC_PATH | FC_FUNC;
498 if (!iam_whence) {
499 /* Note that -p on its own is deal with in comexec() */
500 if (pflag)
501 fcflags |= FC_DEFPATH;
502 /*
503 * Convert command options to whence options - note that
504 * command -pV uses a different path search than whence -v
505 * or whence -pv. This should be considered a feature.
506 */
507 vflag = Vflag;
508 }
509 if (pflag)
510 fcflags &= ~(FC_BI | FC_FUNC);
511
512 while ((vflag || rv == 0) && (id = *wp++) != NULL) {
513 uint32_t h = 0;
514
515 tp = NULL;
516 if ((iam_whence || vflag) && !pflag)
517 tp = ktsearch(&keywords, id, h = hash(id));
518 if (!tp && !pflag) {
519 tp = ktsearch(&aliases, id, h ? h : hash(id));
520 if (tp && !(tp->flag & ISSET))
521 tp = NULL;
522 }
523 if (!tp)
524 tp = findcom(id, fcflags);
525 if (vflag || (tp->type != CALIAS && tp->type != CEXEC &&
526 tp->type != CTALIAS))
527 shf_puts(id, shl_stdout);
528 if (vflag)
529 switch (tp->type) {
530 case CKEYWD:
531 case CALIAS:
532 case CFUNC:
533 case CSHELL:
534 shf_puts(" is a", shl_stdout);
535 break;
536 }
537
538 switch (tp->type) {
539 case CKEYWD:
540 if (vflag)
541 shf_puts(" reserved word", shl_stdout);
542 break;
543 case CALIAS:
544 if (vflag)
545 shprintf("n %s%s for ",
546 (tp->flag & EXPORT) ? "exported " : null,
547 Talias);
548 if (!iam_whence && !vflag)
549 shprintf("%s %s=", Talias, id);
550 print_value_quoted(tp->val.s);
551 break;
552 case CFUNC:
553 if (vflag) {
554 if (tp->flag & EXPORT)
555 shf_puts("n exported", shl_stdout);
556 if (tp->flag & TRACE)
557 shf_puts(" traced", shl_stdout);
558 if (!(tp->flag & ISSET)) {
559 shf_puts(" undefined", shl_stdout);
560 if (tp->u.fpath)
561 shprintf(" (autoload from %s)",
562 tp->u.fpath);
563 }
564 shf_puts(T_function, shl_stdout);
565 }
566 break;
567 case CSHELL:
568 if (vflag)
569 shprintf("%s %s %s",
570 (tp->flag & SPEC_BI) ? " special" : null,
571 "shell", Tbuiltin);
572 break;
573 case CTALIAS:
574 case CEXEC:
575 if (tp->flag & ISSET) {
576 if (vflag) {
577 shf_puts(" is ", shl_stdout);
578 if (tp->type == CTALIAS)
579 shprintf("a tracked %s%s for ",
580 (tp->flag & EXPORT) ?
581 "exported " : null,
582 Talias);
583 }
584 shf_puts(tp->val.s, shl_stdout);
585 } else {
586 if (vflag)
587 shprintf(" %s\n", "not found");
588 rv = 1;
589 }
590 break;
591 default:
592 shprintf("%s is *GOK*", id);
593 break;
594 }
595 if (vflag || !rv)
596 shf_putc('\n', shl_stdout);
597 }
598 return (rv);
599 }
600
601 /* Deal with command -vV - command -p dealt with in comexec() */
602 int
c_command(const char ** wp)603 c_command(const char **wp)
604 {
605 /*
606 * Let c_whence do the work. Note that c_command() must be
607 * a distinct function from c_whence() (tested in comexec()).
608 */
609 return (c_whence(wp));
610 }
611
612 /* typeset, global, export, and readonly */
613 int
c_typeset(const char ** wp)614 c_typeset(const char **wp)
615 {
616 struct block *l;
617 struct tbl *vp, **p;
618 uint32_t fset = 0, fclr = 0, flag;
619 int thing = 0, field, base, optc;
620 const char *opts;
621 const char *fieldstr, *basestr;
622 bool localv = false, func = false, pflag = false, istset = true;
623
624 switch (**wp) {
625
626 /* export */
627 case 'e':
628 fset |= EXPORT;
629 istset = false;
630 break;
631
632 /* readonly */
633 case 'r':
634 fset |= RDONLY;
635 istset = false;
636 break;
637
638 /* set */
639 case 's':
640 /* called with 'typeset -' */
641 break;
642
643 /* typeset */
644 case 't':
645 localv = true;
646 break;
647 }
648
649 /* see comment below regarding possible opions */
650 opts = istset ? "L#R#UZ#afi#lnprtux" : "p";
651
652 fieldstr = basestr = NULL;
653 builtin_opt.flags |= GF_PLUSOPT;
654 /*
655 * AT&T ksh seems to have 0-9 as options which are multiplied
656 * to get a number that is used with -L, -R, -Z or -i (eg, -1R2
657 * sets right justify in a field of 12). This allows options
658 * to be grouped in an order (eg, -Lu12), but disallows -i8 -L3 and
659 * does not allow the number to be specified as a separate argument
660 * Here, the number must follow the RLZi option, but is optional
661 * (see the # kludge in ksh_getopt()).
662 */
663 while ((optc = ksh_getopt(wp, &builtin_opt, opts)) != -1) {
664 flag = 0;
665 switch (optc) {
666 case 'L':
667 flag = LJUST;
668 fieldstr = builtin_opt.optarg;
669 break;
670 case 'R':
671 flag = RJUST;
672 fieldstr = builtin_opt.optarg;
673 break;
674 case 'U':
675 /*
676 * AT&T ksh uses u, but this conflicts with
677 * upper/lower case. If this option is changed,
678 * need to change the -U below as well
679 */
680 flag = INT_U;
681 break;
682 case 'Z':
683 flag = ZEROFIL;
684 fieldstr = builtin_opt.optarg;
685 break;
686 case 'a':
687 /*
688 * this is supposed to set (-a) or unset (+a) the
689 * indexed array attribute; it does nothing on an
690 * existing regular string or indexed array though
691 */
692 break;
693 case 'f':
694 func = true;
695 break;
696 case 'i':
697 flag = INTEGER;
698 basestr = builtin_opt.optarg;
699 break;
700 case 'l':
701 flag = LCASEV;
702 break;
703 case 'n':
704 set_refflag = (builtin_opt.info & GI_PLUS) ?
705 SRF_DISABLE : SRF_ENABLE;
706 break;
707 /* export, readonly: POSIX -p flag */
708 case 'p':
709 /* typeset: show values as well */
710 pflag = true;
711 if (istset)
712 continue;
713 break;
714 case 'r':
715 flag = RDONLY;
716 break;
717 case 't':
718 flag = TRACE;
719 break;
720 case 'u':
721 /* upper case / autoload */
722 flag = UCASEV_AL;
723 break;
724 case 'x':
725 flag = EXPORT;
726 break;
727 case '?':
728 return (1);
729 }
730 if (builtin_opt.info & GI_PLUS) {
731 fclr |= flag;
732 fset &= ~flag;
733 thing = '+';
734 } else {
735 fset |= flag;
736 fclr &= ~flag;
737 thing = '-';
738 }
739 }
740
741 field = 0;
742 if (fieldstr && !bi_getn(fieldstr, &field))
743 return (1);
744 base = 0;
745 if (basestr && !bi_getn(basestr, &base))
746 return (1);
747
748 if (!(builtin_opt.info & GI_MINUSMINUS) && wp[builtin_opt.optind] &&
749 (wp[builtin_opt.optind][0] == '-' ||
750 wp[builtin_opt.optind][0] == '+') &&
751 wp[builtin_opt.optind][1] == '\0') {
752 thing = wp[builtin_opt.optind][0];
753 builtin_opt.optind++;
754 }
755
756 if (func && (((fset|fclr) & ~(TRACE|UCASEV_AL|EXPORT)) ||
757 set_refflag != SRF_NOP)) {
758 bi_errorf("only -t, -u and -x options may be used with -f");
759 set_refflag = SRF_NOP;
760 return (1);
761 }
762 if (wp[builtin_opt.optind]) {
763 /*
764 * Take care of exclusions.
765 * At this point, flags in fset are cleared in fclr and vice
766 * versa. This property should be preserved.
767 */
768 if (fset & LCASEV)
769 /* LCASEV has priority over UCASEV_AL */
770 fset &= ~UCASEV_AL;
771 if (fset & LJUST)
772 /* LJUST has priority over RJUST */
773 fset &= ~RJUST;
774 if ((fset & (ZEROFIL|LJUST)) == ZEROFIL) {
775 /* -Z implies -ZR */
776 fset |= RJUST;
777 fclr &= ~RJUST;
778 }
779 /*
780 * Setting these attributes clears the others, unless they
781 * are also set in this command
782 */
783 if ((fset & (LJUST | RJUST | ZEROFIL | UCASEV_AL | LCASEV |
784 INTEGER | INT_U | INT_L)) || set_refflag != SRF_NOP)
785 fclr |= ~fset & (LJUST | RJUST | ZEROFIL | UCASEV_AL |
786 LCASEV | INTEGER | INT_U | INT_L);
787 }
788
789 /* set variables and attributes */
790 if (wp[builtin_opt.optind]) {
791 int i, rv = 0;
792 struct tbl *f;
793
794 if (localv && !func)
795 fset |= LOCAL;
796 for (i = builtin_opt.optind; wp[i]; i++) {
797 if (func) {
798 f = findfunc(wp[i], hash(wp[i]),
799 tobool(fset & UCASEV_AL));
800 if (!f) {
801 /* AT&T ksh does ++rv: bogus */
802 rv = 1;
803 continue;
804 }
805 if (fset | fclr) {
806 f->flag |= fset;
807 f->flag &= ~fclr;
808 } else {
809 fpFUNCTf(shl_stdout, 0,
810 tobool(f->flag & FKSH),
811 wp[i], f->val.t);
812 shf_putc('\n', shl_stdout);
813 }
814 } else if (!typeset(wp[i], fset, fclr, field, base)) {
815 bi_errorf("%s: %s", wp[i], "not identifier");
816 set_refflag = SRF_NOP;
817 return (1);
818 }
819 }
820 set_refflag = SRF_NOP;
821 return (rv);
822 }
823
824 /* list variables and attributes */
825
826 /* no difference at this point.. */
827 flag = fset | fclr;
828 if (func) {
829 for (l = e->loc; l; l = l->next) {
830 for (p = ktsort(&l->funs); (vp = *p++); ) {
831 if (flag && (vp->flag & flag) == 0)
832 continue;
833 if (thing == '-')
834 fpFUNCTf(shl_stdout, 0,
835 tobool(vp->flag & FKSH),
836 vp->name, vp->val.t);
837 else
838 shf_puts(vp->name, shl_stdout);
839 shf_putc('\n', shl_stdout);
840 }
841 }
842 } else {
843 for (l = e->loc; l; l = l->next) {
844 for (p = ktsort(&l->vars); (vp = *p++); ) {
845 struct tbl *tvp;
846 bool any_set = false;
847 /*
848 * See if the parameter is set (for arrays, if any
849 * element is set).
850 */
851 for (tvp = vp; tvp; tvp = tvp->u.array)
852 if (tvp->flag & ISSET) {
853 any_set = true;
854 break;
855 }
856
857 /*
858 * Check attributes - note that all array elements
859 * have (should have?) the same attributes, so checking
860 * the first is sufficient.
861 *
862 * Report an unset param only if the user has
863 * explicitly given it some attribute (like export);
864 * otherwise, after "echo $FOO", we would report FOO...
865 */
866 if (!any_set && !(vp->flag & USERATTRIB))
867 continue;
868 if (flag && (vp->flag & flag) == 0)
869 continue;
870 for (; vp; vp = vp->u.array) {
871 /*
872 * Ignore array elements that aren't
873 * set unless there are no set elements,
874 * in which case the first is reported on
875 */
876 if ((vp->flag&ARRAY) && any_set &&
877 !(vp->flag & ISSET))
878 continue;
879 /* no arguments */
880 if (thing == 0 && flag == 0) {
881 /*
882 * AT&T ksh prints things
883 * like export, integer,
884 * leftadj, zerofill, etc.,
885 * but POSIX says must
886 * be suitable for re-entry...
887 */
888 shf_puts("typeset ", shl_stdout);
889 if (((vp->flag&(ARRAY|ASSOC))==ASSOC))
890 shprintf("%s ", "-n");
891 if ((vp->flag&INTEGER))
892 shprintf("%s ", "-i");
893 if ((vp->flag&EXPORT))
894 shprintf("%s ", "-x");
895 if ((vp->flag&RDONLY))
896 shprintf("%s ", "-r");
897 if ((vp->flag&TRACE))
898 shprintf("%s ", "-t");
899 if ((vp->flag&LJUST))
900 shprintf("-L%d ", vp->u2.field);
901 if ((vp->flag&RJUST))
902 shprintf("-R%d ", vp->u2.field);
903 if ((vp->flag&ZEROFIL))
904 shprintf("%s ", "-Z");
905 if ((vp->flag&LCASEV))
906 shprintf("%s ", "-l");
907 if ((vp->flag&UCASEV_AL))
908 shprintf("%s ", "-u");
909 if ((vp->flag&INT_U))
910 shprintf("%s ", "-U");
911 shf_puts(vp->name, shl_stdout);
912 if (pflag) {
913 char *s = str_val(vp);
914
915 shf_putc('=', shl_stdout);
916 /*
917 * AT&T ksh can't have
918 * justified integers...
919 */
920 if ((vp->flag &
921 (INTEGER|LJUST|RJUST)) ==
922 INTEGER)
923 shf_puts(s, shl_stdout);
924 else
925 print_value_quoted(s);
926 }
927 shf_putc('\n', shl_stdout);
928 if (vp->flag & ARRAY)
929 break;
930 } else {
931 if (pflag)
932 shf_puts(istset ?
933 "typeset " :
934 (flag & EXPORT) ?
935 "export " :
936 "readonly ",
937 shl_stdout);
938 if ((vp->flag&ARRAY) && any_set)
939 shprintf("%s[%lu]",
940 vp->name,
941 arrayindex(vp));
942 else
943 shf_puts(vp->name, shl_stdout);
944 if (thing == '-' && (vp->flag&ISSET)) {
945 char *s = str_val(vp);
946
947 shf_putc('=', shl_stdout);
948 /*
949 * AT&T ksh can't have
950 * justified integers...
951 */
952 if ((vp->flag &
953 (INTEGER|LJUST|RJUST)) ==
954 INTEGER)
955 shf_puts(s, shl_stdout);
956 else
957 print_value_quoted(s);
958 }
959 shf_putc('\n', shl_stdout);
960 }
961 /*
962 * Only report first 'element' of an array with
963 * no set elements.
964 */
965 if (!any_set)
966 break;
967 }
968 }
969 }
970 }
971 return (0);
972 }
973
974 int
c_alias(const char ** wp)975 c_alias(const char **wp)
976 {
977 struct table *t = &aliases;
978 int rv = 0, prefix = 0;
979 bool rflag = false, tflag, Uflag = false, pflag = false;
980 uint32_t xflag = 0;
981 int optc;
982
983 builtin_opt.flags |= GF_PLUSOPT;
984 while ((optc = ksh_getopt(wp, &builtin_opt, "dprtUx")) != -1) {
985 prefix = builtin_opt.info & GI_PLUS ? '+' : '-';
986 switch (optc) {
987 case 'd':
988 #ifdef MKSH_NOPWNAM
989 t = NULL; /* fix "alias -dt" */
990 #else
991 t = &homedirs;
992 #endif
993 break;
994 case 'p':
995 pflag = true;
996 break;
997 case 'r':
998 rflag = true;
999 break;
1000 case 't':
1001 t = &taliases;
1002 break;
1003 case 'U':
1004 /*
1005 * kludge for tracked alias initialization
1006 * (don't do a path search, just make an entry)
1007 */
1008 Uflag = true;
1009 break;
1010 case 'x':
1011 xflag = EXPORT;
1012 break;
1013 case '?':
1014 return (1);
1015 }
1016 }
1017 #ifdef MKSH_NOPWNAM
1018 if (t == NULL)
1019 return (0);
1020 #endif
1021 wp += builtin_opt.optind;
1022
1023 if (!(builtin_opt.info & GI_MINUSMINUS) && *wp &&
1024 (wp[0][0] == '-' || wp[0][0] == '+') && wp[0][1] == '\0') {
1025 prefix = wp[0][0];
1026 wp++;
1027 }
1028
1029 tflag = t == &taliases;
1030
1031 /* "hash -r" means reset all the tracked aliases.. */
1032 if (rflag) {
1033 static const char *args[] = {
1034 Tunalias, "-ta", NULL
1035 };
1036
1037 if (!tflag || *wp) {
1038 shprintf("%s: -r flag can only be used with -t"
1039 " and without arguments\n", Talias);
1040 return (1);
1041 }
1042 ksh_getopt_reset(&builtin_opt, GF_ERROR);
1043 return (c_unalias(args));
1044 }
1045
1046 if (*wp == NULL) {
1047 struct tbl *ap, **p;
1048
1049 for (p = ktsort(t); (ap = *p++) != NULL; )
1050 if ((ap->flag & (ISSET|xflag)) == (ISSET|xflag)) {
1051 if (pflag)
1052 shprintf("%s ", Talias);
1053 shf_puts(ap->name, shl_stdout);
1054 if (prefix != '+') {
1055 shf_putc('=', shl_stdout);
1056 print_value_quoted(ap->val.s);
1057 }
1058 shf_putc('\n', shl_stdout);
1059 }
1060 }
1061
1062 for (; *wp != NULL; wp++) {
1063 const char *alias = *wp, *val, *newval;
1064 char *xalias = NULL;
1065 struct tbl *ap;
1066 uint32_t h;
1067
1068 if ((val = cstrchr(alias, '='))) {
1069 strndupx(xalias, alias, val++ - alias, ATEMP);
1070 alias = xalias;
1071 }
1072 h = hash(alias);
1073 if (val == NULL && !tflag && !xflag) {
1074 ap = ktsearch(t, alias, h);
1075 if (ap != NULL && (ap->flag&ISSET)) {
1076 if (pflag)
1077 shprintf("%s ", Talias);
1078 shf_puts(ap->name, shl_stdout);
1079 if (prefix != '+') {
1080 shf_putc('=', shl_stdout);
1081 print_value_quoted(ap->val.s);
1082 }
1083 shf_putc('\n', shl_stdout);
1084 } else {
1085 shprintf("%s %s %s\n", alias, Talias,
1086 "not found");
1087 rv = 1;
1088 }
1089 continue;
1090 }
1091 ap = ktenter(t, alias, h);
1092 ap->type = tflag ? CTALIAS : CALIAS;
1093 /* Are we setting the value or just some flags? */
1094 if ((val && !tflag) || (!val && tflag && !Uflag)) {
1095 if (ap->flag&ALLOC) {
1096 ap->flag &= ~(ALLOC|ISSET);
1097 afree(ap->val.s, APERM);
1098 }
1099 /* ignore values for -t (AT&T ksh does this) */
1100 newval = tflag ?
1101 search_path(alias, path, X_OK, NULL) :
1102 val;
1103 if (newval) {
1104 strdupx(ap->val.s, newval, APERM);
1105 ap->flag |= ALLOC|ISSET;
1106 } else
1107 ap->flag &= ~ISSET;
1108 }
1109 ap->flag |= DEFINED;
1110 if (prefix == '+')
1111 ap->flag &= ~xflag;
1112 else
1113 ap->flag |= xflag;
1114 afree(xalias, ATEMP);
1115 }
1116
1117 return (rv);
1118 }
1119
1120 int
c_unalias(const char ** wp)1121 c_unalias(const char **wp)
1122 {
1123 struct table *t = &aliases;
1124 struct tbl *ap;
1125 int optc, rv = 0;
1126 bool all = false;
1127
1128 while ((optc = ksh_getopt(wp, &builtin_opt, "adt")) != -1)
1129 switch (optc) {
1130 case 'a':
1131 all = true;
1132 break;
1133 case 'd':
1134 #ifdef MKSH_NOPWNAM
1135 /* fix "unalias -dt" */
1136 t = NULL;
1137 #else
1138 t = &homedirs;
1139 #endif
1140 break;
1141 case 't':
1142 t = &taliases;
1143 break;
1144 case '?':
1145 return (1);
1146 }
1147 #ifdef MKSH_NOPWNAM
1148 if (t == NULL)
1149 return (0);
1150 #endif
1151 wp += builtin_opt.optind;
1152
1153 for (; *wp != NULL; wp++) {
1154 ap = ktsearch(t, *wp, hash(*wp));
1155 if (ap == NULL) {
1156 /* POSIX */
1157 rv = 1;
1158 continue;
1159 }
1160 if (ap->flag&ALLOC) {
1161 ap->flag &= ~(ALLOC|ISSET);
1162 afree(ap->val.s, APERM);
1163 }
1164 ap->flag &= ~(DEFINED|ISSET|EXPORT);
1165 }
1166
1167 if (all) {
1168 struct tstate ts;
1169
1170 for (ktwalk(&ts, t); (ap = ktnext(&ts)); ) {
1171 if (ap->flag&ALLOC) {
1172 ap->flag &= ~(ALLOC|ISSET);
1173 afree(ap->val.s, APERM);
1174 }
1175 ap->flag &= ~(DEFINED|ISSET|EXPORT);
1176 }
1177 }
1178
1179 return (rv);
1180 }
1181
1182 int
c_let(const char ** wp)1183 c_let(const char **wp)
1184 {
1185 int rv = 1;
1186 mksh_ari_t val;
1187
1188 if (wp[1] == NULL)
1189 /* AT&T ksh does this */
1190 bi_errorf("no arguments");
1191 else
1192 for (wp++; *wp; wp++)
1193 if (!evaluate(*wp, &val, KSH_RETURN_ERROR, true)) {
1194 /* distinguish error from zero result */
1195 rv = 2;
1196 break;
1197 } else
1198 rv = val == 0;
1199 return (rv);
1200 }
1201
1202 int
c_jobs(const char ** wp)1203 c_jobs(const char **wp)
1204 {
1205 int optc, flag = 0, nflag = 0, rv = 0;
1206
1207 while ((optc = ksh_getopt(wp, &builtin_opt, "lpnz")) != -1)
1208 switch (optc) {
1209 case 'l':
1210 flag = 1;
1211 break;
1212 case 'p':
1213 flag = 2;
1214 break;
1215 case 'n':
1216 nflag = 1;
1217 break;
1218 case 'z':
1219 /* debugging: print zombies */
1220 nflag = -1;
1221 break;
1222 case '?':
1223 return (1);
1224 }
1225 wp += builtin_opt.optind;
1226 if (!*wp) {
1227 if (j_jobs(NULL, flag, nflag))
1228 rv = 1;
1229 } else {
1230 for (; *wp; wp++)
1231 if (j_jobs(*wp, flag, nflag))
1232 rv = 1;
1233 }
1234 return (rv);
1235 }
1236
1237 #ifndef MKSH_UNEMPLOYED
1238 int
c_fgbg(const char ** wp)1239 c_fgbg(const char **wp)
1240 {
1241 bool bg = strcmp(*wp, "bg") == 0;
1242 int rv = 0;
1243
1244 if (!Flag(FMONITOR)) {
1245 bi_errorf("job control not enabled");
1246 return (1);
1247 }
1248 if (ksh_getopt(wp, &builtin_opt, null) == '?')
1249 return (1);
1250 wp += builtin_opt.optind;
1251 if (*wp)
1252 for (; *wp; wp++)
1253 rv = j_resume(*wp, bg);
1254 else
1255 rv = j_resume("%%", bg);
1256 return (bg ? 0 : rv);
1257 }
1258 #endif
1259
1260 /* format a single kill item */
1261 static char *
kill_fmt_entry(char * buf,size_t buflen,int i,const void * arg)1262 kill_fmt_entry(char *buf, size_t buflen, int i, const void *arg)
1263 {
1264 const struct kill_info *ki = (const struct kill_info *)arg;
1265
1266 i++;
1267 shf_snprintf(buf, buflen, "%*d %*s %s",
1268 ki->num_width, i,
1269 ki->name_width, sigtraps[i].name,
1270 sigtraps[i].mess);
1271 return (buf);
1272 }
1273
1274 int
c_kill(const char ** wp)1275 c_kill(const char **wp)
1276 {
1277 Trap *t = NULL;
1278 const char *p;
1279 bool lflag = false;
1280 int i, n, rv, sig;
1281
1282 /* assume old style options if -digits or -UPPERCASE */
1283 if ((p = wp[1]) && *p == '-' && (ksh_isdigit(p[1]) ||
1284 ksh_isupper(p[1]))) {
1285 if (!(t = gettrap(p + 1, true))) {
1286 bi_errorf("bad signal '%s'", p + 1);
1287 return (1);
1288 }
1289 i = (wp[2] && strcmp(wp[2], "--") == 0) ? 3 : 2;
1290 } else {
1291 int optc;
1292
1293 while ((optc = ksh_getopt(wp, &builtin_opt, "ls:")) != -1)
1294 switch (optc) {
1295 case 'l':
1296 lflag = true;
1297 break;
1298 case 's':
1299 if (!(t = gettrap(builtin_opt.optarg, true))) {
1300 bi_errorf("bad signal '%s'",
1301 builtin_opt.optarg);
1302 return (1);
1303 }
1304 break;
1305 case '?':
1306 return (1);
1307 }
1308 i = builtin_opt.optind;
1309 }
1310 if ((lflag && t) || (!wp[i] && !lflag)) {
1311 #ifndef MKSH_SMALL
1312 shf_puts("usage:\tkill [-s signame | -signum | -signame]"
1313 " { job | pid | pgrp } ...\n"
1314 "\tkill -l [exit_status ...]\n", shl_out);
1315 #endif
1316 bi_errorfz();
1317 return (1);
1318 }
1319
1320 if (lflag) {
1321 if (wp[i]) {
1322 for (; wp[i]; i++) {
1323 if (!bi_getn(wp[i], &n))
1324 return (1);
1325 if (n > 128 && n < 128 + NSIG)
1326 n -= 128;
1327 if (n > 0 && n < NSIG)
1328 shprintf("%s\n", sigtraps[n].name);
1329 else
1330 shprintf("%d\n", n);
1331 }
1332 } else {
1333 ssize_t w, mess_cols, mess_octs;
1334 int j;
1335 struct kill_info ki;
1336
1337 for (j = NSIG, ki.num_width = 1; j >= 10; j /= 10)
1338 ki.num_width++;
1339 ki.name_width = mess_cols = mess_octs = 0;
1340 for (j = 0; j < NSIG; j++) {
1341 w = strlen(sigtraps[j].name);
1342 if (w > ki.name_width)
1343 ki.name_width = w;
1344 w = strlen(sigtraps[j].mess);
1345 if (w > mess_octs)
1346 mess_octs = w;
1347 w = utf_mbswidth(sigtraps[j].mess);
1348 if (w > mess_cols)
1349 mess_cols = w;
1350 }
1351
1352 print_columns(shl_stdout, NSIG - 1,
1353 kill_fmt_entry, (void *)&ki,
1354 ki.num_width + 1 + ki.name_width + 1 + mess_octs,
1355 ki.num_width + 1 + ki.name_width + 1 + mess_cols,
1356 true);
1357 }
1358 return (0);
1359 }
1360 rv = 0;
1361 sig = t ? t->signal : SIGTERM;
1362 for (; (p = wp[i]); i++) {
1363 if (*p == '%') {
1364 if (j_kill(p, sig))
1365 rv = 1;
1366 } else if (!getn(p, &n)) {
1367 bi_errorf("%s: %s", p,
1368 "arguments must be jobs or process IDs");
1369 rv = 1;
1370 } else {
1371 if (mksh_kill(n, sig) < 0) {
1372 bi_errorf("%s: %s", p, strerror(errno));
1373 rv = 1;
1374 }
1375 }
1376 }
1377 return (rv);
1378 }
1379
1380 void
getopts_reset(int val)1381 getopts_reset(int val)
1382 {
1383 if (val >= 1) {
1384 ksh_getopt_reset(&user_opt, GF_NONAME | GF_PLUSOPT);
1385 user_opt.optind = user_opt.uoptind = val;
1386 }
1387 }
1388
1389 int
c_getopts(const char ** wp)1390 c_getopts(const char **wp)
1391 {
1392 int argc, optc, rv;
1393 const char *opts, *var;
1394 char buf[3];
1395 struct tbl *vq, *voptarg;
1396
1397 if (ksh_getopt(wp, &builtin_opt, null) == '?')
1398 return (1);
1399 wp += builtin_opt.optind;
1400
1401 opts = *wp++;
1402 if (!opts) {
1403 bi_errorf("missing %s argument", "options");
1404 return (1);
1405 }
1406
1407 var = *wp++;
1408 if (!var) {
1409 bi_errorf("missing %s argument", "name");
1410 return (1);
1411 }
1412 if (!*var || *skip_varname(var, true)) {
1413 bi_errorf("%s: %s", var, "is not an identifier");
1414 return (1);
1415 }
1416
1417 if (e->loc->next == NULL) {
1418 internal_warningf("%s: %s", "c_getopts", "no argv");
1419 return (1);
1420 }
1421 /* Which arguments are we parsing... */
1422 if (*wp == NULL)
1423 wp = e->loc->next->argv;
1424 else
1425 *--wp = e->loc->next->argv[0];
1426
1427 /* Check that our saved state won't cause a core dump... */
1428 for (argc = 0; wp[argc]; argc++)
1429 ;
1430 if (user_opt.optind > argc ||
1431 (user_opt.p != 0 &&
1432 user_opt.p > strlen(wp[user_opt.optind - 1]))) {
1433 bi_errorf("arguments changed since last call");
1434 return (1);
1435 }
1436
1437 user_opt.optarg = NULL;
1438 optc = ksh_getopt(wp, &user_opt, opts);
1439
1440 if (optc >= 0 && optc != '?' && (user_opt.info & GI_PLUS)) {
1441 buf[0] = '+';
1442 buf[1] = optc;
1443 buf[2] = '\0';
1444 } else {
1445 /*
1446 * POSIX says var is set to ? at end-of-options, AT&T ksh
1447 * sets it to null - we go with POSIX...
1448 */
1449 buf[0] = optc < 0 ? '?' : optc;
1450 buf[1] = '\0';
1451 }
1452
1453 /* AT&T ksh93 in fact does change OPTIND for unknown options too */
1454 user_opt.uoptind = user_opt.optind;
1455
1456 voptarg = global("OPTARG");
1457 /* AT&T ksh clears ro and int */
1458 voptarg->flag &= ~RDONLY;
1459 /* Paranoia: ensure no bizarre results. */
1460 if (voptarg->flag & INTEGER)
1461 typeset("OPTARG", 0, INTEGER, 0, 0);
1462 if (user_opt.optarg == NULL)
1463 unset(voptarg, 1);
1464 else
1465 /* This can't fail (have cleared readonly/integer) */
1466 setstr(voptarg, user_opt.optarg, KSH_RETURN_ERROR);
1467
1468 rv = 0;
1469
1470 vq = global(var);
1471 /* Error message already printed (integer, readonly) */
1472 if (!setstr(vq, buf, KSH_RETURN_ERROR))
1473 rv = 2;
1474 if (Flag(FEXPORT))
1475 typeset(var, EXPORT, 0, 0, 0);
1476
1477 return (optc < 0 ? 1 : rv);
1478 }
1479
1480 int
c_bind(const char ** wp)1481 c_bind(const char **wp)
1482 {
1483 int optc, rv = 0;
1484 #ifndef MKSH_SMALL
1485 bool macro = false;
1486 #endif
1487 bool list = false;
1488 const char *cp;
1489 char *up;
1490
1491 while ((optc = ksh_getopt(wp, &builtin_opt,
1492 #ifndef MKSH_SMALL
1493 "lm"
1494 #else
1495 "l"
1496 #endif
1497 )) != -1)
1498 switch (optc) {
1499 case 'l':
1500 list = true;
1501 break;
1502 #ifndef MKSH_SMALL
1503 case 'm':
1504 macro = true;
1505 break;
1506 #endif
1507 case '?':
1508 return (1);
1509 }
1510 wp += builtin_opt.optind;
1511
1512 if (*wp == NULL)
1513 /* list all */
1514 rv = x_bind(NULL, NULL,
1515 #ifndef MKSH_SMALL
1516 false,
1517 #endif
1518 list);
1519
1520 for (; *wp != NULL; wp++) {
1521 if ((cp = cstrchr(*wp, '=')) == NULL)
1522 up = NULL;
1523 else {
1524 strdupx(up, *wp, ATEMP);
1525 up[cp++ - *wp] = '\0';
1526 }
1527 if (x_bind(up ? up : *wp, cp,
1528 #ifndef MKSH_SMALL
1529 macro,
1530 #endif
1531 false))
1532 rv = 1;
1533 afree(up, ATEMP);
1534 }
1535
1536 return (rv);
1537 }
1538
1539 int
c_shift(const char ** wp)1540 c_shift(const char **wp)
1541 {
1542 struct block *l = e->loc;
1543 int n;
1544 mksh_ari_t val;
1545 const char *arg;
1546
1547 if (ksh_getopt(wp, &builtin_opt, null) == '?')
1548 return (1);
1549 arg = wp[builtin_opt.optind];
1550
1551 if (arg) {
1552 evaluate(arg, &val, KSH_UNWIND_ERROR, false);
1553 n = val;
1554 } else
1555 n = 1;
1556 if (n < 0) {
1557 bi_errorf("%s: %s", arg, "bad number");
1558 return (1);
1559 }
1560 if (l->argc < n) {
1561 bi_errorf("nothing to shift");
1562 return (1);
1563 }
1564 l->argv[n] = l->argv[0];
1565 l->argv += n;
1566 l->argc -= n;
1567 return (0);
1568 }
1569
1570 int
c_umask(const char ** wp)1571 c_umask(const char **wp)
1572 {
1573 int i, optc;
1574 const char *cp;
1575 bool symbolic = false;
1576 mode_t old_umask;
1577
1578 while ((optc = ksh_getopt(wp, &builtin_opt, "S")) != -1)
1579 switch (optc) {
1580 case 'S':
1581 symbolic = true;
1582 break;
1583 case '?':
1584 return (1);
1585 }
1586 cp = wp[builtin_opt.optind];
1587 if (cp == NULL) {
1588 old_umask = umask((mode_t)0);
1589 umask(old_umask);
1590 if (symbolic) {
1591 char buf[18], *p;
1592 int j;
1593
1594 old_umask = ~old_umask;
1595 p = buf;
1596 for (i = 0; i < 3; i++) {
1597 *p++ = "ugo"[i];
1598 *p++ = '=';
1599 for (j = 0; j < 3; j++)
1600 if (old_umask & (1 << (8 - (3*i + j))))
1601 *p++ = "rwx"[j];
1602 *p++ = ',';
1603 }
1604 p[-1] = '\0';
1605 shprintf("%s\n", buf);
1606 } else
1607 shprintf("%#3.3o\n", (unsigned int)old_umask);
1608 } else {
1609 mode_t new_umask;
1610
1611 if (ksh_isdigit(*cp)) {
1612 for (new_umask = 0; *cp >= '0' && *cp <= '7'; cp++)
1613 new_umask = new_umask * 8 + (*cp - '0');
1614 if (*cp) {
1615 bi_errorf("bad number");
1616 return (1);
1617 }
1618 } else {
1619 /* symbolic format */
1620 int positions, new_val;
1621 char op;
1622
1623 old_umask = umask((mode_t)0);
1624 /* in case of error */
1625 umask(old_umask);
1626 old_umask = ~old_umask;
1627 new_umask = old_umask;
1628 positions = 0;
1629 while (*cp) {
1630 while (*cp && vstrchr("augo", *cp))
1631 switch (*cp++) {
1632 case 'a':
1633 positions |= 0111;
1634 break;
1635 case 'u':
1636 positions |= 0100;
1637 break;
1638 case 'g':
1639 positions |= 0010;
1640 break;
1641 case 'o':
1642 positions |= 0001;
1643 break;
1644 }
1645 if (!positions)
1646 /* default is a */
1647 positions = 0111;
1648 if (!vstrchr("=+-", op = *cp))
1649 break;
1650 cp++;
1651 new_val = 0;
1652 while (*cp && vstrchr("rwxugoXs", *cp))
1653 switch (*cp++) {
1654 case 'r': new_val |= 04; break;
1655 case 'w': new_val |= 02; break;
1656 case 'x': new_val |= 01; break;
1657 case 'u':
1658 new_val |= old_umask >> 6;
1659 break;
1660 case 'g':
1661 new_val |= old_umask >> 3;
1662 break;
1663 case 'o':
1664 new_val |= old_umask >> 0;
1665 break;
1666 case 'X':
1667 if (old_umask & 0111)
1668 new_val |= 01;
1669 break;
1670 case 's':
1671 /* ignored */
1672 break;
1673 }
1674 new_val = (new_val & 07) * positions;
1675 switch (op) {
1676 case '-':
1677 new_umask &= ~new_val;
1678 break;
1679 case '=':
1680 new_umask = new_val |
1681 (new_umask & ~(positions * 07));
1682 break;
1683 case '+':
1684 new_umask |= new_val;
1685 }
1686 if (*cp == ',') {
1687 positions = 0;
1688 cp++;
1689 } else if (!vstrchr("=+-", *cp))
1690 break;
1691 }
1692 if (*cp) {
1693 bi_errorf("bad mask");
1694 return (1);
1695 }
1696 new_umask = ~new_umask;
1697 }
1698 umask(new_umask);
1699 }
1700 return (0);
1701 }
1702
1703 int
c_dot(const char ** wp)1704 c_dot(const char **wp)
1705 {
1706 const char *file, *cp, **argv;
1707 int argc, i, errcode;
1708
1709 if (ksh_getopt(wp, &builtin_opt, null) == '?')
1710 return (1);
1711
1712 if ((cp = wp[builtin_opt.optind]) == NULL) {
1713 bi_errorf("missing argument");
1714 return (1);
1715 }
1716 if ((file = search_path(cp, path, R_OK, &errcode)) == NULL) {
1717 bi_errorf("%s: %s", cp, strerror(errcode));
1718 return (1);
1719 }
1720
1721 /* Set positional parameters? */
1722 if (wp[builtin_opt.optind + 1]) {
1723 argv = wp + builtin_opt.optind;
1724 /* preserve $0 */
1725 argv[0] = e->loc->argv[0];
1726 for (argc = 0; argv[argc + 1]; argc++)
1727 ;
1728 } else {
1729 argc = 0;
1730 argv = NULL;
1731 }
1732 if ((i = include(file, argc, argv, 0)) < 0) {
1733 /* should not happen */
1734 bi_errorf("%s: %s", cp, strerror(errno));
1735 return (1);
1736 }
1737 return (i);
1738 }
1739
1740 int
c_wait(const char ** wp)1741 c_wait(const char **wp)
1742 {
1743 int rv = 0, sig;
1744
1745 if (ksh_getopt(wp, &builtin_opt, null) == '?')
1746 return (1);
1747 wp += builtin_opt.optind;
1748 if (*wp == NULL) {
1749 while (waitfor(NULL, &sig) >= 0)
1750 ;
1751 rv = sig;
1752 } else {
1753 for (; *wp; wp++)
1754 rv = waitfor(*wp, &sig);
1755 if (rv < 0)
1756 /* magic exit code: bad job-id */
1757 rv = sig ? sig : 127;
1758 }
1759 return (rv);
1760 }
1761
1762 int
c_read(const char ** wp)1763 c_read(const char **wp)
1764 {
1765 #define is_ifsws(c) (ctype((c), C_IFS) && ctype((c), C_IFSWS))
1766 static char REPLY[] = "REPLY";
1767 int c, fd = 0, rv = 0, lastparm = 0;
1768 bool savehist = false, intoarray = false, aschars = false;
1769 bool rawmode = false, expanding = false;
1770 enum { LINES, BYTES, UPTO, READALL } readmode = LINES;
1771 char delim = '\n';
1772 size_t bytesleft = 128, bytesread;
1773 struct tbl *vp /* FU gcc */ = NULL, *vq;
1774 char *cp, *allocd = NULL, *xp;
1775 const char *ccp;
1776 XString xs;
1777 ptrdiff_t xsave = 0;
1778 struct termios tios;
1779 bool restore_tios = false;
1780 #if HAVE_SELECT
1781 bool hastimeout = false;
1782 struct timeval tv, tvlim;
1783 #define c_read_opts "Aad:N:n:prst:u,"
1784 #else
1785 #define c_read_opts "Aad:N:n:prsu,"
1786 #endif
1787
1788 while ((c = ksh_getopt(wp, &builtin_opt, c_read_opts)) != -1)
1789 switch (c) {
1790 case 'a':
1791 aschars = true;
1792 /* FALLTHROUGH */
1793 case 'A':
1794 intoarray = true;
1795 break;
1796 case 'd':
1797 delim = builtin_opt.optarg[0];
1798 break;
1799 case 'N':
1800 case 'n':
1801 readmode = c == 'N' ? BYTES : UPTO;
1802 if (!bi_getn(builtin_opt.optarg, &c))
1803 return (2);
1804 if (c == -1) {
1805 readmode = READALL;
1806 bytesleft = 1024;
1807 } else
1808 bytesleft = (unsigned int)c;
1809 break;
1810 case 'p':
1811 if ((fd = coproc_getfd(R_OK, &ccp)) < 0) {
1812 bi_errorf("%s: %s", "-p", ccp);
1813 return (2);
1814 }
1815 break;
1816 case 'r':
1817 rawmode = true;
1818 break;
1819 case 's':
1820 savehist = true;
1821 break;
1822 #if HAVE_SELECT
1823 case 't':
1824 if (parse_usec(builtin_opt.optarg, &tv)) {
1825 bi_errorf("%s: %s '%s'", Tsynerr, strerror(errno),
1826 builtin_opt.optarg);
1827 return (2);
1828 }
1829 hastimeout = true;
1830 break;
1831 #endif
1832 case 'u':
1833 if (!builtin_opt.optarg[0])
1834 fd = 0;
1835 else if ((fd = check_fd(builtin_opt.optarg, R_OK, &ccp)) < 0) {
1836 bi_errorf("%s: %s: %s", "-u", builtin_opt.optarg, ccp);
1837 return (2);
1838 }
1839 break;
1840 case '?':
1841 return (2);
1842 }
1843 wp += builtin_opt.optind;
1844 if (*wp == NULL)
1845 *--wp = REPLY;
1846
1847 if (intoarray && wp[1] != NULL) {
1848 bi_errorf("too many arguments");
1849 return (2);
1850 }
1851
1852 if ((ccp = cstrchr(*wp, '?')) != NULL) {
1853 strdupx(allocd, *wp, ATEMP);
1854 allocd[ccp - *wp] = '\0';
1855 *wp = allocd;
1856 if (isatty(fd)) {
1857 /*
1858 * AT&T ksh says it prints prompt on fd if it's open
1859 * for writing and is a tty, but it doesn't do it
1860 * (it also doesn't check the interactive flag,
1861 * as is indicated in the Korn Shell book).
1862 */
1863 shf_puts(ccp + 1, shl_out);
1864 shf_flush(shl_out);
1865 }
1866 }
1867
1868 Xinit(xs, xp, bytesleft, ATEMP);
1869
1870 if (readmode == LINES)
1871 bytesleft = 1;
1872 else if (isatty(fd)) {
1873 x_mkraw(fd, &tios, true);
1874 restore_tios = true;
1875 }
1876
1877 #if HAVE_SELECT
1878 if (hastimeout) {
1879 gettimeofday(&tvlim, NULL);
1880 timeradd(&tvlim, &tv, &tvlim);
1881 }
1882 #endif
1883
1884 c_read_readloop:
1885 #if HAVE_SELECT
1886 if (hastimeout) {
1887 fd_set fdset;
1888
1889 FD_ZERO(&fdset);
1890 FD_SET(fd, &fdset);
1891 gettimeofday(&tv, NULL);
1892 timersub(&tvlim, &tv, &tv);
1893 if (tv.tv_sec < 0) {
1894 /* timeout expired globally */
1895 rv = 1;
1896 goto c_read_out;
1897 }
1898
1899 switch (select(fd + 1, &fdset, NULL, NULL, &tv)) {
1900 case 1:
1901 break;
1902 case 0:
1903 /* timeout expired for this call */
1904 rv = 1;
1905 goto c_read_out;
1906 default:
1907 bi_errorf("%s: %s", Tselect, strerror(errno));
1908 rv = 2;
1909 goto c_read_out;
1910 }
1911 }
1912 #endif
1913
1914 bytesread = blocking_read(fd, xp, bytesleft);
1915 if (bytesread == (size_t)-1) {
1916 /* interrupted */
1917 if (errno == EINTR && fatal_trap_check()) {
1918 /*
1919 * Was the offending signal one that would
1920 * normally kill a process? If so, pretend
1921 * the read was killed.
1922 */
1923 rv = 2;
1924 goto c_read_out;
1925 }
1926 /* just ignore the signal */
1927 goto c_read_readloop;
1928 }
1929
1930 switch (readmode) {
1931 case READALL:
1932 if (bytesread == 0) {
1933 /* end of file reached */
1934 rv = 1;
1935 goto c_read_readdone;
1936 }
1937 xp += bytesread;
1938 XcheckN(xs, xp, bytesleft);
1939 break;
1940
1941 case UPTO:
1942 if (bytesread == 0)
1943 /* end of file reached */
1944 rv = 1;
1945 xp += bytesread;
1946 goto c_read_readdone;
1947
1948 case BYTES:
1949 if (bytesread == 0) {
1950 /* end of file reached */
1951 rv = 1;
1952 xp = Xstring(xs, xp);
1953 goto c_read_readdone;
1954 }
1955 xp += bytesread;
1956 if ((bytesleft -= bytesread) == 0)
1957 goto c_read_readdone;
1958 break;
1959 case LINES:
1960 if (bytesread == 0) {
1961 /* end of file reached */
1962 rv = 1;
1963 goto c_read_readdone;
1964 }
1965 if ((c = *xp) == '\0' && !aschars && delim != '\0') {
1966 /* skip any read NULs unless delimiter */
1967 break;
1968 }
1969 if (expanding) {
1970 expanding = false;
1971 if (c == delim) {
1972 if (Flag(FTALKING_I) && isatty(fd)) {
1973 /*
1974 * set prompt in case this is
1975 * called from .profile or $ENV
1976 */
1977 set_prompt(PS2, NULL);
1978 pprompt(prompt, 0);
1979 }
1980 /* drop the backslash */
1981 --xp;
1982 /* and the delimiter */
1983 break;
1984 }
1985 } else if (c == delim) {
1986 goto c_read_readdone;
1987 } else if (!rawmode && c == '\\') {
1988 expanding = true;
1989 }
1990 Xcheck(xs, xp);
1991 ++xp;
1992 break;
1993 }
1994 goto c_read_readloop;
1995
1996 c_read_readdone:
1997 bytesread = Xlength(xs, xp);
1998 Xput(xs, xp, '\0');
1999
2000 /*-
2001 * state: we finished reading the input and NUL terminated it
2002 * Xstring(xs, xp) -> xp-1 = input string without trailing delim
2003 * rv = 1 if EOF, 0 otherwise (errors handled already)
2004 */
2005
2006 if (rv == 1) {
2007 /* clean up coprocess if needed, on EOF */
2008 coproc_read_close(fd);
2009 if (readmode == READALL)
2010 /* EOF is no error here */
2011 rv = 0;
2012 }
2013
2014 if (savehist)
2015 histsave(&source->line, Xstring(xs, xp), true, false);
2016
2017 ccp = cp = Xclose(xs, xp);
2018 expanding = false;
2019 XinitN(xs, 128, ATEMP);
2020 if (intoarray) {
2021 vp = global(*wp);
2022 if (vp->flag & RDONLY) {
2023 c_read_splitro:
2024 bi_errorf("%s: %s", *wp, "is read only");
2025 c_read_spliterr:
2026 rv = 2;
2027 afree(cp, ATEMP);
2028 goto c_read_out;
2029 }
2030 /* exporting an array is currently pointless */
2031 unset(vp, 1);
2032 /* counter for array index */
2033 c = 0;
2034 }
2035 if (!aschars) {
2036 /* skip initial IFS whitespace */
2037 while (bytesread && is_ifsws(*ccp)) {
2038 ++ccp;
2039 --bytesread;
2040 }
2041 /* trim trailing IFS whitespace */
2042 while (bytesread && is_ifsws(ccp[bytesread - 1])) {
2043 --bytesread;
2044 }
2045 }
2046 c_read_splitloop:
2047 xp = Xstring(xs, xp);
2048 /* generate next word */
2049 if (!bytesread) {
2050 /* no more input */
2051 if (intoarray)
2052 goto c_read_splitdone;
2053 /* zero out next parameters */
2054 goto c_read_gotword;
2055 }
2056 if (aschars) {
2057 Xput(xs, xp, '1');
2058 Xput(xs, xp, '#');
2059 bytesleft = utf_ptradj(ccp);
2060 while (bytesleft && bytesread) {
2061 *xp++ = *ccp++;
2062 --bytesleft;
2063 --bytesread;
2064 }
2065 if (xp[-1] == '\0') {
2066 xp[-1] = '0';
2067 xp[-3] = '2';
2068 }
2069 goto c_read_gotword;
2070 }
2071
2072 if (!intoarray && wp[1] == NULL)
2073 lastparm = 1;
2074
2075 c_read_splitlast:
2076 /* copy until IFS character */
2077 while (bytesread) {
2078 char ch;
2079
2080 ch = *ccp;
2081 if (expanding) {
2082 expanding = false;
2083 goto c_read_splitcopy;
2084 } else if (ctype(ch, C_IFS)) {
2085 break;
2086 } else if (!rawmode && ch == '\\') {
2087 expanding = true;
2088 } else {
2089 c_read_splitcopy:
2090 Xcheck(xs, xp);
2091 Xput(xs, xp, ch);
2092 }
2093 ++ccp;
2094 --bytesread;
2095 }
2096 xsave = Xsavepos(xs, xp);
2097 /* copy word delimiter: IFSWS+IFS,IFSWS */
2098 while (bytesread) {
2099 char ch;
2100
2101 ch = *ccp;
2102 if (!ctype(ch, C_IFS))
2103 break;
2104 Xcheck(xs, xp);
2105 Xput(xs, xp, ch);
2106 ++ccp;
2107 --bytesread;
2108 if (!ctype(ch, C_IFSWS))
2109 break;
2110 }
2111 while (bytesread && is_ifsws(*ccp)) {
2112 Xcheck(xs, xp);
2113 Xput(xs, xp, *ccp);
2114 ++ccp;
2115 --bytesread;
2116 }
2117 /* if no more parameters, rinse and repeat */
2118 if (lastparm && bytesread) {
2119 ++lastparm;
2120 goto c_read_splitlast;
2121 }
2122 /* get rid of the delimiter unless we pack the rest */
2123 if (lastparm < 2)
2124 xp = Xrestpos(xs, xp, xsave);
2125 c_read_gotword:
2126 Xput(xs, xp, '\0');
2127 if (intoarray) {
2128 vq = arraysearch(vp, c++);
2129 } else {
2130 vq = global(*wp);
2131 /* must be checked before exporting */
2132 if (vq->flag & RDONLY)
2133 goto c_read_splitro;
2134 if (Flag(FEXPORT))
2135 typeset(*wp, EXPORT, 0, 0, 0);
2136 }
2137 if (!setstr(vq, Xstring(xs, xp), KSH_RETURN_ERROR))
2138 goto c_read_spliterr;
2139 if (aschars) {
2140 setint_v(vq, vq, false);
2141 /* protect from UTFMODE changes */
2142 vq->type = 0;
2143 }
2144 if (intoarray || *++wp != NULL)
2145 goto c_read_splitloop;
2146
2147 c_read_splitdone:
2148 /* free up */
2149 afree(cp, ATEMP);
2150
2151 c_read_out:
2152 afree(allocd, ATEMP);
2153 Xfree(xs, xp);
2154 if (restore_tios)
2155 tcsetattr(fd, TCSADRAIN, &tios);
2156 return (rv);
2157 #undef is_ifsws
2158 }
2159
2160 int
c_eval(const char ** wp)2161 c_eval(const char **wp)
2162 {
2163 struct source *s, *saves = source;
2164 unsigned char savef;
2165 int rv;
2166
2167 if (ksh_getopt(wp, &builtin_opt, null) == '?')
2168 return (1);
2169 s = pushs(SWORDS, ATEMP);
2170 s->u.strv = wp + builtin_opt.optind;
2171
2172 /*-
2173 * The following code handles the case where the command is
2174 * empty due to failed command substitution, for example by
2175 * eval "$(false)"
2176 * This has historically returned 1 by AT&T ksh88. In this
2177 * case, shell() will not set or change exstat because the
2178 * compiled tree is empty, so it will use the value we pass
2179 * from subst_exstat, which is cleared in execute(), so it
2180 * should have been 0 if there were no substitutions.
2181 *
2182 * POSIX however says we don't do this, even though it is
2183 * traditionally done. AT&T ksh93 agrees with POSIX, so we
2184 * do. The following is an excerpt from SUSv4 [1003.2-2008]:
2185 *
2186 * 2.9.1: Simple Commands
2187 * ... If there is a command name, execution shall
2188 * continue as described in 2.9.1.1 [Command Search
2189 * and Execution]. If there is no command name, but
2190 * the command contained a command substitution, the
2191 * command shall complete with the exit status of the
2192 * last command substitution performed.
2193 * 2.9.1.1: Command Search and Execution
2194 * (1) a. If the command name matches the name of a
2195 * special built-in utility, that special built-in
2196 * utility shall be invoked.
2197 * 2.14.5: eval
2198 * If there are no arguments, or only null arguments,
2199 * eval shall return a zero exit status; ...
2200 */
2201 /* exstat = subst_exstat; */ /* AT&T ksh88 */
2202 exstat = 0; /* SUSv4 */
2203
2204 savef = Flag(FERREXIT);
2205 Flag(FERREXIT) = 0;
2206 rv = shell(s, false);
2207 Flag(FERREXIT) = savef;
2208 source = saves;
2209 afree(s, ATEMP);
2210 return (rv);
2211 }
2212
2213 int
c_trap(const char ** wp)2214 c_trap(const char **wp)
2215 {
2216 int i;
2217 const char *s;
2218 Trap *p;
2219
2220 if (ksh_getopt(wp, &builtin_opt, null) == '?')
2221 return (1);
2222 wp += builtin_opt.optind;
2223
2224 if (*wp == NULL) {
2225 for (p = sigtraps, i = NSIG+1; --i >= 0; p++)
2226 if (p->trap != NULL) {
2227 shf_puts("trap -- ", shl_stdout);
2228 print_value_quoted(p->trap);
2229 shprintf(" %s\n", p->name);
2230 }
2231 return (0);
2232 }
2233
2234 /*
2235 * Use case sensitive lookup for first arg so the
2236 * command 'exit' isn't confused with the pseudo-signal
2237 * 'EXIT'.
2238 */
2239 /* get command */
2240 s = (gettrap(*wp, false) == NULL) ? *wp++ : NULL;
2241 if (s != NULL && s[0] == '-' && s[1] == '\0')
2242 s = NULL;
2243
2244 /* set/clear traps */
2245 i = 0;
2246 while (*wp != NULL)
2247 if ((p = gettrap(*wp++, true)) == NULL) {
2248 warningf(true, "%s: %s '%s'", builtin_argv0,
2249 "bad signal", wp[-1]);
2250 ++i;
2251 } else
2252 settrap(p, s);
2253 return (i);
2254 }
2255
2256 int
c_exitreturn(const char ** wp)2257 c_exitreturn(const char **wp)
2258 {
2259 int n, how = LEXIT;
2260 const char *arg;
2261
2262 if (ksh_getopt(wp, &builtin_opt, null) == '?')
2263 return (1);
2264 arg = wp[builtin_opt.optind];
2265
2266 if (arg) {
2267 if (!getn(arg, &n)) {
2268 exstat = 1;
2269 warningf(true, "%s: %s", arg, "bad number");
2270 } else
2271 exstat = n;
2272 } else if (trap_exstat != -1)
2273 exstat = trap_exstat;
2274 if (wp[0][0] == 'r') {
2275 /* return */
2276 struct env *ep;
2277
2278 /*
2279 * need to tell if this is exit or return so trap exit will
2280 * work right (POSIX)
2281 */
2282 for (ep = e; ep; ep = ep->oenv)
2283 if (STOP_RETURN(ep->type)) {
2284 how = LRETURN;
2285 break;
2286 }
2287 }
2288
2289 if (how == LEXIT && !really_exit && j_stopped_running()) {
2290 really_exit = 1;
2291 how = LSHELL;
2292 }
2293
2294 /* get rid of any i/o redirections */
2295 quitenv(NULL);
2296 unwind(how);
2297 /* NOTREACHED */
2298 }
2299
2300 int
c_brkcont(const char ** wp)2301 c_brkcont(const char **wp)
2302 {
2303 int n, quit;
2304 struct env *ep, *last_ep = NULL;
2305 const char *arg;
2306
2307 if (ksh_getopt(wp, &builtin_opt, null) == '?')
2308 return (1);
2309 arg = wp[builtin_opt.optind];
2310
2311 if (!arg)
2312 n = 1;
2313 else if (!bi_getn(arg, &n))
2314 return (1);
2315 quit = n;
2316 if (quit <= 0) {
2317 /* AT&T ksh does this for non-interactive shells only - weird */
2318 bi_errorf("%s: %s", arg, "bad value");
2319 return (1);
2320 }
2321
2322 /* Stop at E_NONE, E_PARSE, E_FUNC, or E_INCL */
2323 for (ep = e; ep && !STOP_BRKCONT(ep->type); ep = ep->oenv)
2324 if (ep->type == E_LOOP) {
2325 if (--quit == 0)
2326 break;
2327 ep->flags |= EF_BRKCONT_PASS;
2328 last_ep = ep;
2329 }
2330
2331 if (quit) {
2332 /*
2333 * AT&T ksh doesn't print a message - just does what it
2334 * can. We print a message 'cause it helps in debugging
2335 * scripts, but don't generate an error (ie, keep going).
2336 */
2337 if (n == quit) {
2338 warningf(true, "%s: %s %s", wp[0], "can't", wp[0]);
2339 return (0);
2340 }
2341 /*
2342 * POSIX says if n is too big, the last enclosing loop
2343 * shall be used. Doesn't say to print an error but we
2344 * do anyway 'cause the user messed up.
2345 */
2346 if (last_ep)
2347 last_ep->flags &= ~EF_BRKCONT_PASS;
2348 warningf(true, "%s: can only %s %d level(s)",
2349 wp[0], wp[0], n - quit);
2350 }
2351
2352 unwind(*wp[0] == 'b' ? LBREAK : LCONTIN);
2353 /* NOTREACHED */
2354 }
2355
2356 int
c_set(const char ** wp)2357 c_set(const char **wp)
2358 {
2359 int argi;
2360 bool setargs;
2361 struct block *l = e->loc;
2362 const char **owp;
2363
2364 if (wp[1] == NULL) {
2365 static const char *args[] = { Tset, "-", NULL };
2366 return (c_typeset(args));
2367 }
2368
2369 argi = parse_args(wp, OF_SET, &setargs);
2370 if (argi < 0)
2371 return (1);
2372 /* set $# and $* */
2373 if (setargs) {
2374 wp += argi - 1;
2375 owp = wp;
2376 /* save $0 */
2377 wp[0] = l->argv[0];
2378 while (*++wp != NULL)
2379 strdupx(*wp, *wp, &l->area);
2380 l->argc = wp - owp - 1;
2381 l->argv = alloc2(l->argc + 2, sizeof(char *), &l->area);
2382 for (wp = l->argv; (*wp++ = *owp++) != NULL; )
2383 ;
2384 }
2385 /*-
2386 * POSIX says set exit status is 0, but old scripts that use
2387 * getopt(1) use the construct
2388 * set -- $(getopt ab:c "$@")
2389 * which assumes the exit value set will be that of the $()
2390 * (subst_exstat is cleared in execute() so that it will be 0
2391 * if there are no command substitutions).
2392 * Switched ksh (!posix !sh) to POSIX in mksh R39b.
2393 */
2394 return (Flag(FSH) ? subst_exstat : 0);
2395 }
2396
2397 int
c_unset(const char ** wp)2398 c_unset(const char **wp)
2399 {
2400 const char *id;
2401 int optc, rv = 0;
2402 bool unset_var = true;
2403
2404 while ((optc = ksh_getopt(wp, &builtin_opt, "fv")) != -1)
2405 switch (optc) {
2406 case 'f':
2407 unset_var = false;
2408 break;
2409 case 'v':
2410 unset_var = true;
2411 break;
2412 case '?':
2413 /*XXX not reached due to GF_ERROR */
2414 return (2);
2415 }
2416 wp += builtin_opt.optind;
2417 for (; (id = *wp) != NULL; wp++)
2418 if (unset_var) {
2419 /* unset variable */
2420 struct tbl *vp;
2421 char *cp = NULL;
2422 size_t n;
2423
2424 n = strlen(id);
2425 if (n > 3 && id[n-3] == '[' && id[n-2] == '*' &&
2426 id[n-1] == ']') {
2427 strndupx(cp, id, n - 3, ATEMP);
2428 id = cp;
2429 optc = 3;
2430 } else
2431 optc = vstrchr(id, '[') ? 0 : 1;
2432
2433 vp = global(id);
2434 afree(cp, ATEMP);
2435
2436 if ((vp->flag&RDONLY)) {
2437 warningf(true, "%s: %s", vp->name,
2438 "is read only");
2439 rv = 1;
2440 } else
2441 unset(vp, optc);
2442 } else
2443 /* unset function */
2444 define(id, NULL);
2445 return (rv);
2446 }
2447
2448 static void
p_time(struct shf * shf,bool posix,long tv_sec,int tv_usec,int width,const char * prefix,const char * suffix)2449 p_time(struct shf *shf, bool posix, long tv_sec, int tv_usec, int width,
2450 const char *prefix, const char *suffix)
2451 {
2452 tv_usec /= 10000;
2453 if (posix)
2454 shf_fprintf(shf, "%s%*ld.%02d%s", prefix, width,
2455 tv_sec, tv_usec, suffix);
2456 else
2457 shf_fprintf(shf, "%s%*ldm%d.%02ds%s", prefix, width,
2458 tv_sec / 60, (int)(tv_sec % 60), tv_usec, suffix);
2459 }
2460
2461 int
c_times(const char ** wp MKSH_A_UNUSED)2462 c_times(const char **wp MKSH_A_UNUSED)
2463 {
2464 struct rusage usage;
2465
2466 getrusage(RUSAGE_SELF, &usage);
2467 p_time(shl_stdout, false, usage.ru_utime.tv_sec,
2468 usage.ru_utime.tv_usec, 0, null, " ");
2469 p_time(shl_stdout, false, usage.ru_stime.tv_sec,
2470 usage.ru_stime.tv_usec, 0, null, "\n");
2471
2472 getrusage(RUSAGE_CHILDREN, &usage);
2473 p_time(shl_stdout, false, usage.ru_utime.tv_sec,
2474 usage.ru_utime.tv_usec, 0, null, " ");
2475 p_time(shl_stdout, false, usage.ru_stime.tv_sec,
2476 usage.ru_stime.tv_usec, 0, null, "\n");
2477
2478 return (0);
2479 }
2480
2481 /*
2482 * time pipeline (really a statement, not a built-in command)
2483 */
2484 int
timex(struct op * t,int f,volatile int * xerrok)2485 timex(struct op *t, int f, volatile int *xerrok)
2486 {
2487 #define TF_NOARGS BIT(0)
2488 #define TF_NOREAL BIT(1) /* don't report real time */
2489 #define TF_POSIX BIT(2) /* report in POSIX format */
2490 int rv = 0, tf = 0;
2491 struct rusage ru0, ru1, cru0, cru1;
2492 struct timeval usrtime, systime, tv0, tv1;
2493
2494 gettimeofday(&tv0, NULL);
2495 getrusage(RUSAGE_SELF, &ru0);
2496 getrusage(RUSAGE_CHILDREN, &cru0);
2497 if (t->left) {
2498 /*
2499 * Two ways of getting cpu usage of a command: just use t0
2500 * and t1 (which will get cpu usage from other jobs that
2501 * finish while we are executing t->left), or get the
2502 * cpu usage of t->left. AT&T ksh does the former, while
2503 * pdksh tries to do the later (the j_usrtime hack doesn't
2504 * really work as it only counts the last job).
2505 */
2506 timerclear(&j_usrtime);
2507 timerclear(&j_systime);
2508 rv = execute(t->left, f | XTIME, xerrok);
2509 if (t->left->type == TCOM)
2510 tf |= t->left->str[0];
2511 gettimeofday(&tv1, NULL);
2512 getrusage(RUSAGE_SELF, &ru1);
2513 getrusage(RUSAGE_CHILDREN, &cru1);
2514 } else
2515 tf = TF_NOARGS;
2516
2517 if (tf & TF_NOARGS) {
2518 /* ksh93 - report shell times (shell+kids) */
2519 tf |= TF_NOREAL;
2520 timeradd(&ru0.ru_utime, &cru0.ru_utime, &usrtime);
2521 timeradd(&ru0.ru_stime, &cru0.ru_stime, &systime);
2522 } else {
2523 timersub(&ru1.ru_utime, &ru0.ru_utime, &usrtime);
2524 timeradd(&usrtime, &j_usrtime, &usrtime);
2525 timersub(&ru1.ru_stime, &ru0.ru_stime, &systime);
2526 timeradd(&systime, &j_systime, &systime);
2527 }
2528
2529 if (!(tf & TF_NOREAL)) {
2530 timersub(&tv1, &tv0, &tv1);
2531 if (tf & TF_POSIX)
2532 p_time(shl_out, true, tv1.tv_sec, tv1.tv_usec,
2533 5, "real ", "\n");
2534 else
2535 p_time(shl_out, false, tv1.tv_sec, tv1.tv_usec,
2536 5, null, " real ");
2537 }
2538 if (tf & TF_POSIX)
2539 p_time(shl_out, true, usrtime.tv_sec, usrtime.tv_usec,
2540 5, "user ", "\n");
2541 else
2542 p_time(shl_out, false, usrtime.tv_sec, usrtime.tv_usec,
2543 5, null, " user ");
2544 if (tf & TF_POSIX)
2545 p_time(shl_out, true, systime.tv_sec, systime.tv_usec,
2546 5, "sys ", "\n");
2547 else
2548 p_time(shl_out, false, systime.tv_sec, systime.tv_usec,
2549 5, null, " system\n");
2550 shf_flush(shl_out);
2551
2552 return (rv);
2553 }
2554
2555 void
timex_hook(struct op * t,char ** volatile * app)2556 timex_hook(struct op *t, char **volatile *app)
2557 {
2558 char **wp = *app;
2559 int optc, i, j;
2560 Getopt opt;
2561
2562 ksh_getopt_reset(&opt, 0);
2563 /* start at the start */
2564 opt.optind = 0;
2565 while ((optc = ksh_getopt((const char **)wp, &opt, ":p")) != -1)
2566 switch (optc) {
2567 case 'p':
2568 t->str[0] |= TF_POSIX;
2569 break;
2570 case '?':
2571 errorf("time: -%s %s", opt.optarg,
2572 "unknown option");
2573 case ':':
2574 errorf("time: -%s %s", opt.optarg,
2575 "requires an argument");
2576 }
2577 /* Copy command words down over options. */
2578 if (opt.optind != 0) {
2579 for (i = 0; i < opt.optind; i++)
2580 afree(wp[i], ATEMP);
2581 for (i = 0, j = opt.optind; (wp[i] = wp[j]); i++, j++)
2582 ;
2583 }
2584 if (!wp[0])
2585 t->str[0] |= TF_NOARGS;
2586 *app = wp;
2587 }
2588
2589 /* exec with no args - args case is taken care of in comexec() */
2590 int
c_exec(const char ** wp MKSH_A_UNUSED)2591 c_exec(const char **wp MKSH_A_UNUSED)
2592 {
2593 int i;
2594
2595 /* make sure redirects stay in place */
2596 if (e->savefd != NULL) {
2597 for (i = 0; i < NUFILE; i++) {
2598 if (e->savefd[i] > 0)
2599 close(e->savefd[i]);
2600 /*
2601 * keep all file descriptors > 2 private for ksh,
2602 * but not for POSIX or legacy/kludge sh
2603 */
2604 if (!Flag(FPOSIX) && !Flag(FSH) && i > 2 &&
2605 e->savefd[i])
2606 fcntl(i, F_SETFD, FD_CLOEXEC);
2607 }
2608 e->savefd = NULL;
2609 }
2610 return (0);
2611 }
2612
2613 #if HAVE_MKNOD
2614 int
c_mknod(const char ** wp)2615 c_mknod(const char **wp)
2616 {
2617 int argc, optc, rv = 0;
2618 bool ismkfifo = false;
2619 const char **argv;
2620 void *set = NULL;
2621 mode_t mode = 0, oldmode = 0;
2622
2623 while ((optc = ksh_getopt(wp, &builtin_opt, "m:")) != -1) {
2624 switch (optc) {
2625 case 'm':
2626 set = setmode(builtin_opt.optarg);
2627 if (set == NULL) {
2628 bi_errorf("invalid file mode");
2629 return (1);
2630 }
2631 mode = getmode(set, (mode_t)(DEFFILEMODE));
2632 free_ossetmode(set);
2633 break;
2634 default:
2635 goto c_mknod_usage;
2636 }
2637 }
2638 argv = &wp[builtin_opt.optind];
2639 if (argv[0] == NULL)
2640 goto c_mknod_usage;
2641 for (argc = 0; argv[argc]; argc++)
2642 ;
2643 if (argc == 2 && argv[1][0] == 'p')
2644 ismkfifo = true;
2645 else if (argc != 4 || (argv[1][0] != 'b' && argv[1][0] != 'c'))
2646 goto c_mknod_usage;
2647
2648 if (set != NULL)
2649 oldmode = umask((mode_t)0);
2650 else
2651 mode = DEFFILEMODE;
2652
2653 mode |= (argv[1][0] == 'b') ? S_IFBLK :
2654 (argv[1][0] == 'c') ? S_IFCHR : 0;
2655
2656 if (!ismkfifo) {
2657 unsigned long majnum, minnum;
2658 dev_t dv;
2659 char *c;
2660
2661 majnum = strtoul(argv[2], &c, 0);
2662 if ((c == argv[2]) || (*c != '\0')) {
2663 bi_errorf("non-numeric %s %s '%s'", "device", "major", argv[2]);
2664 goto c_mknod_err;
2665 }
2666 minnum = strtoul(argv[3], &c, 0);
2667 if ((c == argv[3]) || (*c != '\0')) {
2668 bi_errorf("non-numeric %s %s '%s'", "device", "minor", argv[3]);
2669 goto c_mknod_err;
2670 }
2671 dv = makedev(majnum, minnum);
2672 if ((unsigned long)(major(dv)) != majnum) {
2673 bi_errorf("%s %s too large: %lu", "device", "major", majnum);
2674 goto c_mknod_err;
2675 }
2676 if ((unsigned long)(minor(dv)) != minnum) {
2677 bi_errorf("%s %s too large: %lu", "device", "minor", minnum);
2678 goto c_mknod_err;
2679 }
2680 if (mknod(argv[0], mode, dv))
2681 goto c_mknod_failed;
2682 } else if (mkfifo(argv[0], mode)) {
2683 c_mknod_failed:
2684 bi_errorf("%s: %s", argv[0], strerror(errno));
2685 c_mknod_err:
2686 rv = 1;
2687 }
2688
2689 if (set)
2690 umask(oldmode);
2691 return (rv);
2692 c_mknod_usage:
2693 bi_errorf("%s: %s", "usage", "mknod [-m mode] name b|c major minor");
2694 bi_errorf("%s: %s", "usage", "mknod [-m mode] name p");
2695 return (1);
2696 }
2697 #endif
2698
2699 /*-
2700 test(1) accepts the following grammar:
2701 oexpr ::= aexpr | aexpr "-o" oexpr ;
2702 aexpr ::= nexpr | nexpr "-a" aexpr ;
2703 nexpr ::= primary | "!" nexpr ;
2704 primary ::= unary-operator operand
2705 | operand binary-operator operand
2706 | operand
2707 | "(" oexpr ")"
2708 ;
2709
2710 unary-operator ::= "-a"|"-r"|"-w"|"-x"|"-e"|"-f"|"-d"|"-c"|"-b"|"-p"|
2711 "-u"|"-g"|"-k"|"-s"|"-t"|"-z"|"-n"|"-o"|"-O"|"-G"|
2712 "-L"|"-h"|"-S"|"-H";
2713
2714 binary-operator ::= "="|"=="|"!="|"-eq"|"-ne"|"-ge"|"-gt"|"-le"|"-lt"|
2715 "-nt"|"-ot"|"-ef"|
2716 "<"|">" # rules used for [[ .. ]] expressions
2717 ;
2718 operand ::= <any thing>
2719 */
2720
2721 /* POSIX says > 1 for errors */
2722 #define T_ERR_EXIT 2
2723
2724 int
c_test(const char ** wp)2725 c_test(const char **wp)
2726 {
2727 int argc, res;
2728 Test_env te;
2729
2730 te.flags = 0;
2731 te.isa = ptest_isa;
2732 te.getopnd = ptest_getopnd;
2733 te.eval = test_eval;
2734 te.error = ptest_error;
2735
2736 for (argc = 0; wp[argc]; argc++)
2737 ;
2738
2739 if (strcmp(wp[0], "[") == 0) {
2740 if (strcmp(wp[--argc], "]") != 0) {
2741 bi_errorf("missing ]");
2742 return (T_ERR_EXIT);
2743 }
2744 }
2745
2746 te.pos.wp = wp + 1;
2747 te.wp_end = wp + argc;
2748
2749 /*
2750 * Handle the special cases from POSIX.2, section 4.62.4.
2751 * Implementation of all the rules isn't necessary since
2752 * our parser does the right thing for the omitted steps.
2753 */
2754 if (argc <= 5) {
2755 const char **owp = wp, **owpend = te.wp_end;
2756 int invert = 0;
2757 Test_op op;
2758 const char *opnd1, *opnd2;
2759
2760 if (argc >= 2 && ((*te.isa)(&te, TM_OPAREN))) {
2761 te.pos.wp = te.wp_end - 1;
2762 if ((*te.isa)(&te, TM_CPAREN)) {
2763 argc -= 2;
2764 te.wp_end--;
2765 te.pos.wp = owp + 2;
2766 } else {
2767 te.pos.wp = owp + 1;
2768 te.wp_end = owpend;
2769 }
2770 }
2771
2772 while (--argc >= 0) {
2773 if ((*te.isa)(&te, TM_END))
2774 return (!0);
2775 if (argc == 3) {
2776 opnd1 = (*te.getopnd)(&te, TO_NONOP, 1);
2777 if ((op = (*te.isa)(&te, TM_BINOP))) {
2778 opnd2 = (*te.getopnd)(&te, op, 1);
2779 res = (*te.eval)(&te, op, opnd1,
2780 opnd2, 1);
2781 if (te.flags & TEF_ERROR)
2782 return (T_ERR_EXIT);
2783 if (invert & 1)
2784 res = !res;
2785 return (!res);
2786 }
2787 /* back up to opnd1 */
2788 te.pos.wp--;
2789 }
2790 if (argc == 1) {
2791 opnd1 = (*te.getopnd)(&te, TO_NONOP, 1);
2792 res = (*te.eval)(&te, TO_STNZE, opnd1,
2793 NULL, 1);
2794 if (invert & 1)
2795 res = !res;
2796 return (!res);
2797 }
2798 if ((*te.isa)(&te, TM_NOT)) {
2799 invert++;
2800 } else
2801 break;
2802 }
2803 te.pos.wp = owp + 1;
2804 te.wp_end = owpend;
2805 }
2806
2807 return (test_parse(&te));
2808 }
2809
2810 /*
2811 * Generic test routines.
2812 */
2813
2814 Test_op
test_isop(Test_meta meta,const char * s)2815 test_isop(Test_meta meta, const char *s)
2816 {
2817 char sc1;
2818 const struct t_op *tbl;
2819
2820 tbl = meta == TM_UNOP ? u_ops : b_ops;
2821 if (*s) {
2822 sc1 = s[1];
2823 for (; tbl->op_text[0]; tbl++)
2824 if (sc1 == tbl->op_text[1] && !strcmp(s, tbl->op_text))
2825 return (tbl->op_num);
2826 }
2827 return (TO_NONOP);
2828 }
2829
2830 int
test_eval(Test_env * te,Test_op op,const char * opnd1,const char * opnd2,bool do_eval)2831 test_eval(Test_env *te, Test_op op, const char *opnd1, const char *opnd2,
2832 bool do_eval)
2833 {
2834 int i, s;
2835 size_t k;
2836 struct stat b1, b2;
2837 mksh_ari_t v1, v2;
2838
2839 if (!do_eval)
2840 return (0);
2841
2842 switch (op) {
2843
2844 /*
2845 * Unary Operators
2846 */
2847
2848 /* -n */
2849 case TO_STNZE:
2850 return (*opnd1 != '\0');
2851
2852 /* -z */
2853 case TO_STZER:
2854 return (*opnd1 == '\0');
2855
2856 /* -o */
2857 case TO_OPTION:
2858 if ((i = *opnd1) == '!' || i == '?')
2859 opnd1++;
2860 if ((k = option(opnd1)) == (size_t)-1)
2861 return (0);
2862 return (i == '?' ? 1 : i == '!' ? !Flag(k) : Flag(k));
2863
2864 /* -r */
2865 case TO_FILRD:
2866 /* LINTED use of access */
2867 return (access(opnd1, R_OK) == 0);
2868
2869 /* -w */
2870 case TO_FILWR:
2871 /* LINTED use of access */
2872 return (access(opnd1, W_OK) == 0);
2873
2874 /* -x */
2875 case TO_FILEX:
2876 return (ksh_access(opnd1, X_OK) == 0);
2877
2878 /* -a */
2879 case TO_FILAXST:
2880 /* -e */
2881 case TO_FILEXST:
2882 return (stat(opnd1, &b1) == 0);
2883
2884 /* -r */
2885 case TO_FILREG:
2886 return (stat(opnd1, &b1) == 0 && S_ISREG(b1.st_mode));
2887
2888 /* -d */
2889 case TO_FILID:
2890 return (stat(opnd1, &b1) == 0 && S_ISDIR(b1.st_mode));
2891
2892 /* -c */
2893 case TO_FILCDEV:
2894 return (stat(opnd1, &b1) == 0 && S_ISCHR(b1.st_mode));
2895
2896 /* -b */
2897 case TO_FILBDEV:
2898 return (stat(opnd1, &b1) == 0 && S_ISBLK(b1.st_mode));
2899
2900 /* -p */
2901 case TO_FILFIFO:
2902 return (stat(opnd1, &b1) == 0 && S_ISFIFO(b1.st_mode));
2903
2904 /* -h or -L */
2905 case TO_FILSYM:
2906 return (lstat(opnd1, &b1) == 0 && S_ISLNK(b1.st_mode));
2907
2908 /* -S */
2909 case TO_FILSOCK:
2910 return (stat(opnd1, &b1) == 0 && S_ISSOCK(b1.st_mode));
2911
2912 /* -H => HP context dependent files (directories) */
2913 case TO_FILCDF:
2914 #ifdef S_ISCDF
2915 {
2916 char *nv;
2917
2918 /*
2919 * Append a + to filename and check to see if result is
2920 * a setuid directory. CDF stuff in general is hookey,
2921 * since it breaks for, e.g., the following sequence:
2922 * echo hi >foo+; mkdir foo; echo bye >foo/default;
2923 * chmod u+s foo (foo+ refers to the file with hi in it,
2924 * there is no way to get at the file with bye in it;
2925 * please correct me if I'm wrong about this).
2926 */
2927
2928 nv = shf_smprintf("%s+", opnd1);
2929 i = (stat(nv, &b1) == 0 && S_ISCDF(b1.st_mode));
2930 afree(nv, ATEMP);
2931 return (i);
2932 }
2933 #else
2934 return (0);
2935 #endif
2936
2937 /* -u */
2938 case TO_FILSETU:
2939 return (stat(opnd1, &b1) == 0 &&
2940 (b1.st_mode & S_ISUID) == S_ISUID);
2941
2942 /* -g */
2943 case TO_FILSETG:
2944 return (stat(opnd1, &b1) == 0 &&
2945 (b1.st_mode & S_ISGID) == S_ISGID);
2946
2947 /* -k */
2948 case TO_FILSTCK:
2949 #ifdef S_ISVTX
2950 return (stat(opnd1, &b1) == 0 &&
2951 (b1.st_mode & S_ISVTX) == S_ISVTX);
2952 #else
2953 return (0);
2954 #endif
2955
2956 /* -s */
2957 case TO_FILGZ:
2958 return (stat(opnd1, &b1) == 0 && b1.st_size > 0L);
2959
2960 /* -t */
2961 case TO_FILTT:
2962 if (opnd1 && !bi_getn(opnd1, &i)) {
2963 te->flags |= TEF_ERROR;
2964 i = 0;
2965 } else
2966 i = isatty(opnd1 ? i : 0);
2967 return (i);
2968
2969 /* -O */
2970 case TO_FILUID:
2971 return (stat(opnd1, &b1) == 0 && b1.st_uid == ksheuid);
2972
2973 /* -G */
2974 case TO_FILGID:
2975 return (stat(opnd1, &b1) == 0 && b1.st_gid == getegid());
2976
2977 /*
2978 * Binary Operators
2979 */
2980
2981 /* = */
2982 case TO_STEQL:
2983 if (te->flags & TEF_DBRACKET)
2984 return (gmatchx(opnd1, opnd2, false));
2985 return (strcmp(opnd1, opnd2) == 0);
2986
2987 /* != */
2988 case TO_STNEQ:
2989 if (te->flags & TEF_DBRACKET)
2990 return (!gmatchx(opnd1, opnd2, false));
2991 return (strcmp(opnd1, opnd2) != 0);
2992
2993 /* < */
2994 case TO_STLT:
2995 return (strcmp(opnd1, opnd2) < 0);
2996
2997 /* > */
2998 case TO_STGT:
2999 return (strcmp(opnd1, opnd2) > 0);
3000
3001 /* -eq */
3002 case TO_INTEQ:
3003 /* -ne */
3004 case TO_INTNE:
3005 /* -ge */
3006 case TO_INTGE:
3007 /* -gt */
3008 case TO_INTGT:
3009 /* -le */
3010 case TO_INTLE:
3011 /* -lt */
3012 case TO_INTLT:
3013 if (!evaluate(opnd1, &v1, KSH_RETURN_ERROR, false) ||
3014 !evaluate(opnd2, &v2, KSH_RETURN_ERROR, false)) {
3015 /* error already printed.. */
3016 te->flags |= TEF_ERROR;
3017 return (1);
3018 }
3019 switch (op) {
3020 case TO_INTEQ:
3021 return (v1 == v2);
3022 case TO_INTNE:
3023 return (v1 != v2);
3024 case TO_INTGE:
3025 return (v1 >= v2);
3026 case TO_INTGT:
3027 return (v1 > v2);
3028 case TO_INTLE:
3029 return (v1 <= v2);
3030 case TO_INTLT:
3031 return (v1 < v2);
3032 default:
3033 /* NOTREACHED */
3034 break;
3035 }
3036 /* NOTREACHED */
3037
3038 /* -nt */
3039 case TO_FILNT:
3040 /*
3041 * ksh88/ksh93 succeed if file2 can't be stated
3042 * (subtly different from 'does not exist').
3043 */
3044 return (stat(opnd1, &b1) == 0 &&
3045 (((s = stat(opnd2, &b2)) == 0 &&
3046 b1.st_mtime > b2.st_mtime) || s < 0));
3047
3048 /* -ot */
3049 case TO_FILOT:
3050 /*
3051 * ksh88/ksh93 succeed if file1 can't be stated
3052 * (subtly different from 'does not exist').
3053 */
3054 return (stat(opnd2, &b2) == 0 &&
3055 (((s = stat(opnd1, &b1)) == 0 &&
3056 b1.st_mtime < b2.st_mtime) || s < 0));
3057
3058 /* -ef */
3059 case TO_FILEQ:
3060 return (stat (opnd1, &b1) == 0 && stat (opnd2, &b2) == 0 &&
3061 b1.st_dev == b2.st_dev && b1.st_ino == b2.st_ino);
3062
3063 /* all other cases */
3064 case TO_NONOP:
3065 case TO_NONNULL:
3066 /* throw the error */
3067 break;
3068 }
3069 (*te->error)(te, 0, "internal error: unknown op");
3070 return (1);
3071 }
3072
3073 int
test_parse(Test_env * te)3074 test_parse(Test_env *te)
3075 {
3076 int rv;
3077
3078 rv = test_oexpr(te, 1);
3079
3080 if (!(te->flags & TEF_ERROR) && !(*te->isa)(te, TM_END))
3081 (*te->error)(te, 0, "unexpected operator/operand");
3082
3083 return ((te->flags & TEF_ERROR) ? T_ERR_EXIT : !rv);
3084 }
3085
3086 static int
test_oexpr(Test_env * te,bool do_eval)3087 test_oexpr(Test_env *te, bool do_eval)
3088 {
3089 int rv;
3090
3091 if ((rv = test_aexpr(te, do_eval)))
3092 do_eval = false;
3093 if (!(te->flags & TEF_ERROR) && (*te->isa)(te, TM_OR))
3094 return (test_oexpr(te, do_eval) || rv);
3095 return (rv);
3096 }
3097
3098 static int
test_aexpr(Test_env * te,bool do_eval)3099 test_aexpr(Test_env *te, bool do_eval)
3100 {
3101 int rv;
3102
3103 if (!(rv = test_nexpr(te, do_eval)))
3104 do_eval = false;
3105 if (!(te->flags & TEF_ERROR) && (*te->isa)(te, TM_AND))
3106 return (test_aexpr(te, do_eval) && rv);
3107 return (rv);
3108 }
3109
3110 static int
test_nexpr(Test_env * te,bool do_eval)3111 test_nexpr(Test_env *te, bool do_eval)
3112 {
3113 if (!(te->flags & TEF_ERROR) && (*te->isa)(te, TM_NOT))
3114 return (!test_nexpr(te, do_eval));
3115 return (test_primary(te, do_eval));
3116 }
3117
3118 static int
test_primary(Test_env * te,bool do_eval)3119 test_primary(Test_env *te, bool do_eval)
3120 {
3121 const char *opnd1, *opnd2;
3122 int rv;
3123 Test_op op;
3124
3125 if (te->flags & TEF_ERROR)
3126 return (0);
3127 if ((*te->isa)(te, TM_OPAREN)) {
3128 rv = test_oexpr(te, do_eval);
3129 if (te->flags & TEF_ERROR)
3130 return (0);
3131 if (!(*te->isa)(te, TM_CPAREN)) {
3132 (*te->error)(te, 0, "missing )");
3133 return (0);
3134 }
3135 return (rv);
3136 }
3137 /*
3138 * Binary should have precedence over unary in this case
3139 * so that something like test \( -f = -f \) is accepted
3140 */
3141 if ((te->flags & TEF_DBRACKET) || (&te->pos.wp[1] < te->wp_end &&
3142 !test_isop(TM_BINOP, te->pos.wp[1]))) {
3143 if ((op = (*te->isa)(te, TM_UNOP))) {
3144 /* unary expression */
3145 opnd1 = (*te->getopnd)(te, op, do_eval);
3146 if (!opnd1) {
3147 (*te->error)(te, -1, "missing argument");
3148 return (0);
3149 }
3150
3151 return ((*te->eval)(te, op, opnd1, NULL, do_eval));
3152 }
3153 }
3154 opnd1 = (*te->getopnd)(te, TO_NONOP, do_eval);
3155 if (!opnd1) {
3156 (*te->error)(te, 0, "expression expected");
3157 return (0);
3158 }
3159 if ((op = (*te->isa)(te, TM_BINOP))) {
3160 /* binary expression */
3161 opnd2 = (*te->getopnd)(te, op, do_eval);
3162 if (!opnd2) {
3163 (*te->error)(te, -1, "missing second argument");
3164 return (0);
3165 }
3166
3167 return ((*te->eval)(te, op, opnd1, opnd2, do_eval));
3168 }
3169 return ((*te->eval)(te, TO_STNZE, opnd1, NULL, do_eval));
3170 }
3171
3172 /*
3173 * Plain test (test and [ .. ]) specific routines.
3174 */
3175
3176 /*
3177 * Test if the current token is a whatever. Accepts the current token if
3178 * it is. Returns 0 if it is not, non-zero if it is (in the case of
3179 * TM_UNOP and TM_BINOP, the returned value is a Test_op).
3180 */
3181 static Test_op
ptest_isa(Test_env * te,Test_meta meta)3182 ptest_isa(Test_env *te, Test_meta meta)
3183 {
3184 /* Order important - indexed by Test_meta values */
3185 static const char *const tokens[] = {
3186 "-o", "-a", "!", "(", ")"
3187 };
3188 Test_op rv;
3189
3190 if (te->pos.wp >= te->wp_end)
3191 return (meta == TM_END ? TO_NONNULL : TO_NONOP);
3192
3193 if (meta == TM_UNOP || meta == TM_BINOP)
3194 rv = test_isop(meta, *te->pos.wp);
3195 else if (meta == TM_END)
3196 rv = TO_NONOP;
3197 else
3198 rv = !strcmp(*te->pos.wp, tokens[(int)meta]) ?
3199 TO_NONNULL : TO_NONOP;
3200
3201 /* Accept the token? */
3202 if (rv != TO_NONOP)
3203 te->pos.wp++;
3204
3205 return (rv);
3206 }
3207
3208 static const char *
ptest_getopnd(Test_env * te,Test_op op,bool do_eval MKSH_A_UNUSED)3209 ptest_getopnd(Test_env *te, Test_op op, bool do_eval MKSH_A_UNUSED)
3210 {
3211 if (te->pos.wp >= te->wp_end)
3212 return (op == TO_FILTT ? "1" : NULL);
3213 return (*te->pos.wp++);
3214 }
3215
3216 static void
ptest_error(Test_env * te,int ofs,const char * msg)3217 ptest_error(Test_env *te, int ofs, const char *msg)
3218 {
3219 const char *op;
3220
3221 te->flags |= TEF_ERROR;
3222 if ((op = te->pos.wp + ofs >= te->wp_end ? NULL : te->pos.wp[ofs]))
3223 bi_errorf("%s: %s", op, msg);
3224 else
3225 bi_errorf("%s", msg);
3226 }
3227
3228 #ifndef MKSH_NO_LIMITS
3229 #define SOFT 0x1
3230 #define HARD 0x2
3231
3232 struct limits {
3233 const char *name;
3234 int resource; /* resource to get/set */
3235 int factor; /* multiply by to get rlim_{cur,max} values */
3236 char option;
3237 };
3238
3239 static void print_ulimit(const struct limits *, int);
3240 static int set_ulimit(const struct limits *, const char *, int);
3241
3242 /* Magic to divine the 'm' and 'v' limits */
3243
3244 #ifdef RLIMIT_AS
3245 #if !defined(RLIMIT_VMEM) || (RLIMIT_VMEM == RLIMIT_AS) || \
3246 !defined(RLIMIT_RSS) || (RLIMIT_VMEM == RLIMIT_RSS)
3247 #define ULIMIT_V_IS_AS
3248 #elif defined(RLIMIT_VMEM)
3249 #if !defined(RLIMIT_RSS) || (RLIMIT_RSS == RLIMIT_AS)
3250 #define ULIMIT_V_IS_AS
3251 #else
3252 #define ULIMIT_V_IS_VMEM
3253 #endif
3254 #endif
3255 #endif
3256
3257 #ifdef RLIMIT_RSS
3258 #ifdef ULIMIT_V_IS_VMEM
3259 #define ULIMIT_M_IS_RSS
3260 #elif defined(RLIMIT_VMEM) && (RLIMIT_VMEM == RLIMIT_RSS)
3261 #define ULIMIT_M_IS_VMEM
3262 #else
3263 #define ULIMIT_M_IS_RSS
3264 #endif
3265 #if defined(ULIMIT_M_IS_RSS) && defined(RLIMIT_AS) && (RLIMIT_RSS == RLIMIT_AS)
3266 #undef ULIMIT_M_IS_RSS
3267 #endif
3268 #endif
3269
3270 #if !defined(RLIMIT_AS) && !defined(ULIMIT_M_IS_VMEM) && defined(RLIMIT_VMEM)
3271 #define ULIMIT_V_IS_VMEM
3272 #endif
3273
3274 #if !defined(ULIMIT_V_IS_VMEM) && defined(RLIMIT_VMEM) && \
3275 (!defined(RLIMIT_RSS) || (defined(RLIMIT_AS) && (RLIMIT_RSS == RLIMIT_AS)))
3276 #define ULIMIT_M_IS_VMEM
3277 #endif
3278
3279 #if defined(ULIMIT_M_IS_VMEM) && defined(RLIMIT_AS) && \
3280 (RLIMIT_VMEM == RLIMIT_AS)
3281 #undef ULIMIT_M_IS_VMEM
3282 #endif
3283
3284
3285 int
c_ulimit(const char ** wp)3286 c_ulimit(const char **wp)
3287 {
3288 static const struct limits limits[] = {
3289 /* do not use options -H, -S or -a or change the order */
3290 #ifdef RLIMIT_CPU
3291 { "time(cpu-seconds)", RLIMIT_CPU, 1, 't' },
3292 #endif
3293 #ifdef RLIMIT_FSIZE
3294 { "file(blocks)", RLIMIT_FSIZE, 512, 'f' },
3295 #endif
3296 #ifdef RLIMIT_CORE
3297 { "coredump(blocks)", RLIMIT_CORE, 512, 'c' },
3298 #endif
3299 #ifdef RLIMIT_DATA
3300 { "data(KiB)", RLIMIT_DATA, 1024, 'd' },
3301 #endif
3302 #ifdef RLIMIT_STACK
3303 { "stack(KiB)", RLIMIT_STACK, 1024, 's' },
3304 #endif
3305 #ifdef RLIMIT_MEMLOCK
3306 { "lockedmem(KiB)", RLIMIT_MEMLOCK, 1024, 'l' },
3307 #endif
3308 #ifdef RLIMIT_NOFILE
3309 { "nofiles(descriptors)", RLIMIT_NOFILE, 1, 'n' },
3310 #endif
3311 #ifdef RLIMIT_NPROC
3312 { "processes", RLIMIT_NPROC, 1, 'p' },
3313 #endif
3314 #ifdef RLIMIT_SWAP
3315 { "swap(KiB)", RLIMIT_SWAP, 1024, 'w' },
3316 #endif
3317 #ifdef RLIMIT_LOCKS
3318 { "flocks", RLIMIT_LOCKS, -1, 'L' },
3319 #endif
3320 #ifdef RLIMIT_TIME
3321 { "humantime(seconds)", RLIMIT_TIME, 1, 'T' },
3322 #endif
3323 #ifdef RLIMIT_NOVMON
3324 { "vnodemonitors", RLIMIT_NOVMON, 1, 'V' },
3325 #endif
3326 #ifdef RLIMIT_SIGPENDING
3327 { "sigpending", RLIMIT_SIGPENDING, 1, 'i' },
3328 #endif
3329 #ifdef RLIMIT_MSGQUEUE
3330 { "msgqueue(bytes)", RLIMIT_MSGQUEUE, 1, 'q' },
3331 #endif
3332 #ifdef RLIMIT_AIO_MEM
3333 { "AIOlockedmem(KiB)", RLIMIT_AIO_MEM, 1024, 'M' },
3334 #endif
3335 #ifdef RLIMIT_AIO_OPS
3336 { "AIOoperations", RLIMIT_AIO_OPS, 1, 'O' },
3337 #endif
3338 #ifdef RLIMIT_TCACHE
3339 { "cachedthreads", RLIMIT_TCACHE, 1, 'C' },
3340 #endif
3341 #ifdef RLIMIT_SBSIZE
3342 { "sockbufsiz(KiB)", RLIMIT_SBSIZE, 1024, 'B' },
3343 #endif
3344 #ifdef RLIMIT_PTHREAD
3345 { "threadsperprocess", RLIMIT_PTHREAD, 1, 'P' },
3346 #endif
3347 #ifdef RLIMIT_NICE
3348 { "maxnice", RLIMIT_NICE, 1, 'e' },
3349 #endif
3350 #ifdef RLIMIT_RTPRIO
3351 { "maxrtprio", RLIMIT_RTPRIO, 1, 'r' },
3352 #endif
3353 #if defined(ULIMIT_M_IS_RSS)
3354 { "resident-set(KiB)", RLIMIT_RSS, 1024, 'm' },
3355 #elif defined(ULIMIT_M_IS_VMEM)
3356 { "memory(KiB)", RLIMIT_VMEM, 1024, 'm' },
3357 #endif
3358 #if defined(ULIMIT_V_IS_VMEM)
3359 { "virtual-memory(KiB)", RLIMIT_VMEM, 1024, 'v' },
3360 #elif defined(ULIMIT_V_IS_AS)
3361 { "address-space(KiB)", RLIMIT_AS, 1024, 'v' },
3362 #endif
3363 { NULL, 0, 0, 0 }
3364 };
3365 static char opts[3 + NELEM(limits)];
3366 int how = SOFT | HARD, optc, what = 'f';
3367 bool all = false;
3368 const struct limits *l;
3369
3370 if (!opts[0]) {
3371 /* build options string on first call - yuck */
3372 char *p = opts;
3373
3374 *p++ = 'H'; *p++ = 'S'; *p++ = 'a';
3375 for (l = limits; l->name; l++)
3376 *p++ = l->option;
3377 *p = '\0';
3378 }
3379
3380 while ((optc = ksh_getopt(wp, &builtin_opt, opts)) != -1)
3381 switch (optc) {
3382 case 'H':
3383 how = HARD;
3384 break;
3385 case 'S':
3386 how = SOFT;
3387 break;
3388 case 'a':
3389 all = true;
3390 break;
3391 case '?':
3392 bi_errorf("%s: %s", "usage",
3393 "ulimit [-acdfHLlmnpSsTtvw] [value]");
3394 return (1);
3395 default:
3396 what = optc;
3397 }
3398
3399 for (l = limits; l->name && l->option != what; l++)
3400 ;
3401 if (!l->name) {
3402 internal_warningf("ulimit: %c", what);
3403 return (1);
3404 }
3405
3406 if (wp[builtin_opt.optind]) {
3407 if (all || wp[builtin_opt.optind + 1]) {
3408 bi_errorf("too many arguments");
3409 return (1);
3410 }
3411 return (set_ulimit(l, wp[builtin_opt.optind], how));
3412 }
3413 if (!all)
3414 print_ulimit(l, how);
3415 else for (l = limits; l->name; l++) {
3416 shprintf("%-20s ", l->name);
3417 print_ulimit(l, how);
3418 }
3419 return (0);
3420 }
3421
3422 static int
set_ulimit(const struct limits * l,const char * v,int how)3423 set_ulimit(const struct limits *l, const char *v, int how)
3424 {
3425 rlim_t val = (rlim_t)0;
3426 struct rlimit limit;
3427
3428 if (strcmp(v, "unlimited") == 0)
3429 val = (rlim_t)RLIM_INFINITY;
3430 else {
3431 mksh_ari_t rval;
3432
3433 if (!evaluate(v, &rval, KSH_RETURN_ERROR, false))
3434 return (1);
3435 /*
3436 * Avoid problems caused by typos that evaluate misses due
3437 * to evaluating unset parameters to 0...
3438 * If this causes problems, will have to add parameter to
3439 * evaluate() to control if unset params are 0 or an error.
3440 */
3441 if (!rval && !ksh_isdigit(v[0])) {
3442 bi_errorf("invalid %s limit: %s", l->name, v);
3443 return (1);
3444 }
3445 val = (rlim_t)((rlim_t)rval * l->factor);
3446 }
3447
3448 if (getrlimit(l->resource, &limit) < 0) {
3449 /* some can't be read, e.g. Linux RLIMIT_LOCKS */
3450 limit.rlim_cur = RLIM_INFINITY;
3451 limit.rlim_max = RLIM_INFINITY;
3452 }
3453 if (how & SOFT)
3454 limit.rlim_cur = val;
3455 if (how & HARD)
3456 limit.rlim_max = val;
3457 if (!setrlimit(l->resource, &limit))
3458 return (0);
3459 if (errno == EPERM)
3460 bi_errorf("%s exceeds allowable %s limit", v, l->name);
3461 else
3462 bi_errorf("bad %s limit: %s", l->name, strerror(errno));
3463 return (1);
3464 }
3465
3466 static void
print_ulimit(const struct limits * l,int how)3467 print_ulimit(const struct limits *l, int how)
3468 {
3469 rlim_t val = (rlim_t)0;
3470 struct rlimit limit;
3471
3472 if (getrlimit(l->resource, &limit)) {
3473 shf_puts("unknown\n", shl_stdout);
3474 return;
3475 }
3476 if (how & SOFT)
3477 val = limit.rlim_cur;
3478 else if (how & HARD)
3479 val = limit.rlim_max;
3480 if (val == (rlim_t)RLIM_INFINITY)
3481 shf_puts("unlimited\n", shl_stdout);
3482 else
3483 shprintf("%ld\n", (long)(val / l->factor));
3484 }
3485 #endif
3486
3487 int
c_rename(const char ** wp)3488 c_rename(const char **wp)
3489 {
3490 int rv = 1;
3491
3492 /* skip argv[0] */
3493 ++wp;
3494 if (wp[0] && !strcmp(wp[0], "--"))
3495 /* skip "--" (options separator) */
3496 ++wp;
3497
3498 /* check for exactly two arguments */
3499 if (wp[0] == NULL /* first argument */ ||
3500 wp[1] == NULL /* second argument */ ||
3501 wp[2] != NULL /* no further args please */)
3502 bi_errorf(Tsynerr);
3503 else if ((rv = rename(wp[0], wp[1])) != 0) {
3504 rv = errno;
3505 bi_errorf("%s: %s", "failed", strerror(rv));
3506 }
3507
3508 return (rv);
3509 }
3510
3511 int
c_realpath(const char ** wp)3512 c_realpath(const char **wp)
3513 {
3514 int rv = 1;
3515 char *buf;
3516
3517 /* skip argv[0] */
3518 ++wp;
3519 if (wp[0] && !strcmp(wp[0], "--"))
3520 /* skip "--" (options separator) */
3521 ++wp;
3522
3523 /* check for exactly one argument */
3524 if (wp[0] == NULL || wp[1] != NULL)
3525 bi_errorf(Tsynerr);
3526 else if ((buf = do_realpath(wp[0])) == NULL) {
3527 rv = errno;
3528 bi_errorf("%s: %s", wp[0], strerror(rv));
3529 if ((unsigned int)rv > 255)
3530 rv = 255;
3531 } else {
3532 shprintf("%s\n", buf);
3533 afree(buf, ATEMP);
3534 rv = 0;
3535 }
3536
3537 return (rv);
3538 }
3539
3540 int
c_cat(const char ** wp)3541 c_cat(const char **wp)
3542 {
3543 int fd = STDIN_FILENO, rv;
3544 ssize_t n, w;
3545 const char *fn = "<stdin>";
3546 char *buf, *cp;
3547 #define MKSH_CAT_BUFSIZ 4096
3548
3549 if ((buf = malloc_osfunc(MKSH_CAT_BUFSIZ)) == NULL) {
3550 bi_errorf(Toomem, (unsigned long)MKSH_CAT_BUFSIZ);
3551 return (1);
3552 }
3553
3554 /* parse options: POSIX demands we support "-u" as no-op */
3555 while ((rv = ksh_getopt(wp, &builtin_opt, "u")) != -1) {
3556 switch (rv) {
3557 case 'u':
3558 /* we already operate unbuffered */
3559 break;
3560 default:
3561 bi_errorf(Tsynerr);
3562 return (1);
3563 }
3564 }
3565 wp += builtin_opt.optind;
3566 rv = 0;
3567
3568 do {
3569 if (*wp) {
3570 fn = *wp++;
3571 if (fn[0] == '-' && fn[1] == '\0')
3572 fd = STDIN_FILENO;
3573 else if ((fd = open(fn, O_RDONLY)) < 0) {
3574 rv = errno;
3575 bi_errorf("%s: %s", fn, strerror(rv));
3576 rv = 1;
3577 continue;
3578 }
3579 }
3580 while (/* CONSTCOND */ 1) {
3581 n = blocking_read(fd, (cp = buf), MKSH_CAT_BUFSIZ);
3582 if (n == -1) {
3583 if (errno == EINTR) {
3584 /* give the user a chance to ^C out */
3585 intrcheck();
3586 /* interrupted, try again */
3587 continue;
3588 }
3589 /* an error occured during reading */
3590 rv = errno;
3591 bi_errorf("%s: %s", fn, strerror(rv));
3592 rv = 1;
3593 break;
3594 } else if (n == 0)
3595 /* end of file reached */
3596 break;
3597 while (n) {
3598 w = write(STDOUT_FILENO, cp, n);
3599 if (w == -1) {
3600 if (errno == EINTR)
3601 /* interrupted, try again */
3602 continue;
3603 /* an error occured during writing */
3604 rv = errno;
3605 bi_errorf("%s: %s", "<stdout>",
3606 strerror(rv));
3607 rv = 1;
3608 if (fd != STDIN_FILENO)
3609 close(fd);
3610 goto out;
3611 }
3612 n -= w;
3613 cp += w;
3614 }
3615 }
3616 if (fd != STDIN_FILENO)
3617 close(fd);
3618 } while (*wp);
3619
3620 out:
3621 free_osfunc(buf);
3622 return (rv);
3623 }
3624
3625 #if HAVE_SELECT
3626 int
c_sleep(const char ** wp)3627 c_sleep(const char **wp)
3628 {
3629 struct timeval tv;
3630 int rv = 1;
3631
3632 /* skip argv[0] */
3633 ++wp;
3634 if (wp[0] && !strcmp(wp[0], "--"))
3635 /* skip "--" (options separator) */
3636 ++wp;
3637
3638 if (!wp[0] || wp[1])
3639 bi_errorf(Tsynerr);
3640 else if (parse_usec(wp[0], &tv))
3641 bi_errorf("%s: %s '%s'", Tsynerr, strerror(errno), wp[0]);
3642 else {
3643 #ifndef MKSH_NOPROSPECTOFWORK
3644 sigset_t omask;
3645
3646 /* block SIGCHLD from interrupting us, though */
3647 sigprocmask(SIG_BLOCK, &sm_sigchld, &omask);
3648 #endif
3649 if (select(0, NULL, NULL, NULL, &tv) == 0 || errno == EINTR)
3650 /*
3651 * strictly speaking only for SIGALRM, but the
3652 * execution may be interrupted by other signals
3653 */
3654 rv = 0;
3655 else
3656 bi_errorf("%s: %s", Tselect, strerror(errno));
3657 #ifndef MKSH_NOPROSPECTOFWORK
3658 sigprocmask(SIG_SETMASK, &omask, NULL);
3659 #endif
3660 }
3661 return (rv);
3662 }
3663 #endif
3664
3665 #if defined(ANDROID)
3666 static int
c_android_lsmod(const char ** wp MKSH_A_UNUSED)3667 c_android_lsmod(const char **wp MKSH_A_UNUSED)
3668 {
3669 const char *cwp[3] = { "cat", "/proc/modules", NULL };
3670
3671 builtin_argv0 = cwp[0];
3672 return (c_cat(cwp));
3673 }
3674 #endif
3675