File: | src/usr.bin/xargs/xargs.c |
Warning: | line 533, column 10 Although the value stored to 'pid' is used in the enclosing expression, the value is never actually read from 'pid' |
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1 | /* $OpenBSD: xargs.c,v 1.38 2023/12/23 15:58:58 millert Exp $ */ |
2 | /* $FreeBSD: xargs.c,v 1.51 2003/05/03 19:09:11 obrien Exp $ */ |
3 | |
4 | /*- |
5 | * Copyright (c) 1990, 1993 |
6 | * The Regents of the University of California. All rights reserved. |
7 | * |
8 | * This code is derived from software contributed to Berkeley by |
9 | * John B. Roll Jr. |
10 | * |
11 | * Redistribution and use in source and binary forms, with or without |
12 | * modification, are permitted provided that the following conditions |
13 | * are met: |
14 | * 1. Redistributions of source code must retain the above copyright |
15 | * notice, this list of conditions and the following disclaimer. |
16 | * 2. Redistributions in binary form must reproduce the above copyright |
17 | * notice, this list of conditions and the following disclaimer in the |
18 | * documentation and/or other materials provided with the distribution. |
19 | * 3. Neither the name of the University nor the names of its contributors |
20 | * may be used to endorse or promote products derived from this software |
21 | * without specific prior written permission. |
22 | * |
23 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
24 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
25 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
26 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
27 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
28 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
29 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
30 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
31 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
32 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
33 | * SUCH DAMAGE. |
34 | * |
35 | * $xMach: xargs.c,v 1.6 2002/02/23 05:27:47 tim Exp $ |
36 | */ |
37 | |
38 | #include <sys/wait.h> |
39 | |
40 | #include <ctype.h> |
41 | #include <err.h> |
42 | #include <errno(*__errno()).h> |
43 | #include <fcntl.h> |
44 | #include <paths.h> |
45 | #include <signal.h> |
46 | #include <stdio.h> |
47 | #include <stdlib.h> |
48 | #include <string.h> |
49 | #include <unistd.h> |
50 | #include <limits.h> |
51 | |
52 | #include "pathnames.h" |
53 | |
54 | static void parse_input(int, char *[]); |
55 | static void prerun(int, char *[]); |
56 | static int prompt(void); |
57 | static void run(char **); |
58 | static void usage(void); |
59 | void strnsubst(char **, const char *, const char *, size_t); |
60 | static void waitchildren(const char *, int); |
61 | |
62 | static char **av, **bxp, **ep, **endxp, **xp; |
63 | static char *argp, *bbp, *ebp, *inpline, *p, *replstr; |
64 | static const char *eofstr; |
65 | static int count, insingle, indouble, oflag, pflag, tflag, Rflag, rval, zflag; |
66 | static int cnt, Iflag, jfound, Lflag, wasquoted, xflag, runeof = 1; |
67 | static int curprocs, maxprocs; |
68 | static size_t inpsize; |
69 | |
70 | extern char **environ; |
71 | |
72 | int |
73 | main(int argc, char *argv[]) |
74 | { |
75 | long arg_max; |
76 | int ch, Jflag, nargs, nflag, nline; |
77 | size_t linelen; |
78 | char *endptr; |
79 | const char *errstr; |
80 | |
81 | inpline = replstr = NULL((void *)0); |
82 | ep = environ; |
83 | eofstr = ""; |
84 | Jflag = nflag = 0; |
85 | |
86 | /* |
87 | * POSIX.2 limits the exec line length to ARG_MAX - 2K. Running that |
88 | * caused some E2BIG errors, so it was changed to ARG_MAX - 4K. Given |
89 | * that the smallest argument is 2 bytes in length, this means that |
90 | * the number of arguments is limited to: |
91 | * |
92 | * (ARG_MAX - 4K - LENGTH(utility + arguments)) / 2. |
93 | * |
94 | * We arbitrarily limit the number of arguments to 5000. This is |
95 | * allowed by POSIX.2 as long as the resulting minimum exec line is |
96 | * at least LINE_MAX. Realloc'ing as necessary is possible, but |
97 | * probably not worthwhile. |
98 | */ |
99 | nargs = 5000; |
100 | if ((arg_max = sysconf(_SC_ARG_MAX1)) == -1) |
101 | errx(1, "sysconf(_SC_ARG_MAX) failed"); |
102 | |
103 | if (pledge("stdio rpath proc exec", NULL((void *)0)) == -1) |
104 | err(1, "pledge"); |
105 | |
106 | nline = arg_max - 4 * 1024; |
107 | while (*ep != NULL((void *)0)) { |
108 | /* 1 byte for each '\0' */ |
109 | nline -= strlen(*ep++) + 1 + sizeof(*ep); |
110 | } |
111 | maxprocs = 1; |
112 | while ((ch = getopt(argc, argv, "0E:I:J:L:n:oP:pR:rs:tx")) != -1) |
113 | switch (ch) { |
114 | case 'E': |
115 | eofstr = optarg; |
116 | break; |
117 | case 'I': |
118 | Jflag = 0; |
119 | Iflag = 1; |
120 | Lflag = 1; |
121 | replstr = optarg; |
122 | break; |
123 | case 'J': |
124 | Iflag = 0; |
125 | Jflag = 1; |
126 | replstr = optarg; |
127 | break; |
128 | case 'L': |
129 | Lflag = strtonum(optarg, 0, INT_MAX0x7fffffff, &errstr); |
130 | if (errstr) |
131 | errx(1, "-L %s: %s", optarg, errstr); |
132 | break; |
133 | case 'n': |
134 | nflag = 1; |
135 | nargs = strtonum(optarg, 1, INT_MAX0x7fffffff, &errstr); |
136 | if (errstr) |
137 | errx(1, "-n %s: %s", optarg, errstr); |
138 | break; |
139 | case 'o': |
140 | oflag = 1; |
141 | break; |
142 | case 'P': |
143 | maxprocs = strtonum(optarg, 1, INT_MAX0x7fffffff, &errstr); |
144 | if (errstr) |
145 | errx(1, "-P %s: %s", optarg, errstr); |
146 | break; |
147 | case 'p': |
148 | pflag = 1; |
149 | break; |
150 | case 'r': |
151 | runeof = 0; |
152 | break; |
153 | case 'R': |
154 | Rflag = strtol(optarg, &endptr, 10); |
155 | if (*endptr != '\0') |
156 | errx(1, "replacements must be a number"); |
157 | break; |
158 | case 's': |
159 | nline = strtonum(optarg, 0, INT_MAX0x7fffffff, &errstr); |
160 | if (errstr) |
161 | errx(1, "-s %s: %s", optarg, errstr); |
162 | break; |
163 | case 't': |
164 | tflag = 1; |
165 | break; |
166 | case 'x': |
167 | xflag = 1; |
168 | break; |
169 | case '0': |
170 | zflag = 1; |
171 | break; |
172 | default: |
173 | usage(); |
174 | } |
175 | argc -= optind; |
176 | argv += optind; |
177 | |
178 | if (!Iflag && Rflag) |
179 | usage(); |
180 | if (Iflag && !Rflag) |
181 | Rflag = 5; |
182 | if (xflag && !nflag) |
183 | usage(); |
184 | if (Iflag || Lflag) |
185 | xflag = 1; |
186 | if (replstr != NULL((void *)0) && *replstr == '\0') |
187 | errx(1, "replstr may not be empty"); |
188 | |
189 | /* |
190 | * Allocate pointers for the utility name, the utility arguments, |
191 | * the maximum arguments to be read from stdin and the trailing |
192 | * NULL. |
193 | */ |
194 | linelen = 1 + argc + nargs + 1; |
195 | if ((av = bxp = calloc(linelen, sizeof(char *))) == NULL((void *)0)) |
196 | err(1, NULL((void *)0)); |
197 | |
198 | /* |
199 | * Use the user's name for the utility as argv[0], just like the |
200 | * shell. Echo is the default. Set up pointers for the user's |
201 | * arguments. |
202 | */ |
203 | if (*argv == NULL((void *)0)) |
204 | cnt = strlen(*bxp++ = _PATH_ECHO"/bin/echo"); |
205 | else { |
206 | do { |
207 | if (Jflag && strcmp(*argv, replstr) == 0) { |
208 | char **avj; |
209 | jfound = 1; |
210 | argv++; |
211 | for (avj = argv; *avj; avj++) |
212 | cnt += strlen(*avj) + 1; |
213 | break; |
214 | } |
215 | cnt += strlen(*bxp++ = *argv) + 1; |
216 | } while (*++argv != NULL((void *)0)); |
217 | } |
218 | |
219 | /* |
220 | * Set up begin/end/traversing pointers into the array. The -n |
221 | * count doesn't include the trailing NULL pointer, so the malloc |
222 | * added in an extra slot. |
223 | */ |
224 | endxp = (xp = bxp) + nargs; |
225 | |
226 | /* |
227 | * Allocate buffer space for the arguments read from stdin and the |
228 | * trailing NULL. Buffer space is defined as the default or specified |
229 | * space, minus the length of the utility name and arguments. Set up |
230 | * begin/end/traversing pointers into the array. The -s count does |
231 | * include the trailing NULL, so the malloc didn't add in an extra |
232 | * slot. |
233 | */ |
234 | nline -= cnt; |
235 | if (nline <= 0) |
236 | errx(1, "insufficient space for command"); |
237 | |
238 | if ((bbp = malloc((size_t)(nline + 1))) == NULL((void *)0)) |
239 | err(1, NULL((void *)0)); |
240 | ebp = (argp = p = bbp) + nline - 1; |
241 | for (;;) |
242 | parse_input(argc, argv); |
243 | } |
244 | |
245 | static void |
246 | parse_input(int argc, char *argv[]) |
247 | { |
248 | int hasblank = 0; |
249 | static int hadblank = 0; |
250 | int ch, foundeof = 0; |
251 | char **avj; |
252 | |
253 | ch = getchar()(!__isthreaded ? (--((&__sF[0]))->_r < 0 ? __srget( (&__sF[0])) : (int)(*((&__sF[0]))->_p++)) : (getc) ((&__sF[0]))); |
254 | if (isblank(ch)) { |
255 | /* Quotes escape tabs and spaces. */ |
256 | if (insingle || indouble) |
257 | goto addch; |
258 | hasblank = 1; |
259 | if (zflag) |
260 | goto addch; |
261 | goto arg2; |
262 | } |
263 | |
264 | switch (ch) { |
265 | case EOF(-1): |
266 | /* No arguments since last exec. */ |
267 | if (p == bbp) { |
268 | if (runeof) |
269 | prerun(0, av); |
270 | waitchildren(*argv, 1); |
271 | exit(rval); |
272 | } |
273 | goto arg1; |
274 | case '\0': |
275 | if (zflag) { |
276 | /* |
277 | * Increment 'count', so that nulls will be treated |
278 | * as end-of-line, as well as end-of-argument. This |
279 | * is needed so -0 works properly with -I and -L. |
280 | */ |
281 | count++; |
282 | goto arg2; |
283 | } |
284 | goto addch; |
285 | case '\n': |
286 | if (zflag) |
287 | goto addch; |
288 | hasblank = 1; |
289 | if (hadblank == 0) |
290 | count++; |
291 | |
292 | /* Quotes do not escape newlines. */ |
293 | arg1: if (insingle || indouble) |
294 | errx(1, "unterminated quote"); |
295 | arg2: |
296 | foundeof = *eofstr != '\0' && |
297 | strcmp(argp, eofstr) == 0; |
298 | |
299 | /* |
300 | * Do not make empty args unless they are quoted or |
301 | * we are run as "find -0" and not at EOF. |
302 | */ |
303 | if (((zflag && ch != EOF(-1)) || argp != p || wasquoted) && |
304 | !foundeof) { |
305 | *p++ = '\0'; |
306 | *xp++ = argp; |
307 | if (Iflag) { |
308 | size_t curlen; |
309 | |
310 | if (inpline == NULL((void *)0)) |
311 | curlen = 0; |
312 | else { |
313 | /* |
314 | * If this string is not zero |
315 | * length, append a space for |
316 | * separation before the next |
317 | * argument. |
318 | */ |
319 | if ((curlen = strlen(inpline))) |
320 | strlcat(inpline, " ", inpsize); |
321 | } |
322 | curlen++; |
323 | /* |
324 | * Allocate enough to hold what we will |
325 | * be holding in a second, and to append |
326 | * a space next time through, if we have |
327 | * to. |
328 | */ |
329 | inpsize = curlen + 2 + strlen(argp); |
330 | inpline = realloc(inpline, inpsize); |
331 | if (inpline == NULL((void *)0)) |
332 | errx(1, "realloc failed"); |
333 | if (curlen == 1) |
334 | strlcpy(inpline, argp, inpsize); |
335 | else |
336 | strlcat(inpline, argp, inpsize); |
337 | } |
338 | } |
339 | |
340 | /* |
341 | * If max'd out on args or buffer, or reached EOF, |
342 | * run the command. If xflag and max'd out on buffer |
343 | * but not on args, object. Having reached the limit |
344 | * of input lines, as specified by -L is the same as |
345 | * maxing out on arguments. |
346 | */ |
347 | if (xp == endxp || p > ebp || ch == EOF(-1) || |
348 | (Lflag <= count && xflag) || foundeof) { |
349 | if (xflag && xp != endxp && p > ebp) |
350 | errx(1, "insufficient space for arguments"); |
351 | if (jfound) { |
352 | for (avj = argv; *avj; avj++) |
353 | *xp++ = *avj; |
354 | } |
355 | prerun(argc, av); |
356 | if (ch == EOF(-1) || foundeof) { |
357 | waitchildren(*argv, 1); |
358 | exit(rval); |
359 | } |
360 | p = bbp; |
361 | xp = bxp; |
362 | count = 0; |
363 | } |
364 | argp = p; |
365 | wasquoted = 0; |
366 | break; |
367 | case '\'': |
368 | if (indouble || zflag) |
369 | goto addch; |
370 | insingle = !insingle; |
371 | wasquoted = 1; |
372 | break; |
373 | case '"': |
374 | if (insingle || zflag) |
375 | goto addch; |
376 | indouble = !indouble; |
377 | wasquoted = 1; |
378 | break; |
379 | case '\\': |
380 | if (zflag) |
381 | goto addch; |
382 | /* Backslash escapes anything, is escaped by quotes. */ |
383 | if (!insingle && !indouble && (ch = getchar()(!__isthreaded ? (--((&__sF[0]))->_r < 0 ? __srget( (&__sF[0])) : (int)(*((&__sF[0]))->_p++)) : (getc) ((&__sF[0])))) == EOF(-1)) |
384 | errx(1, "backslash at EOF"); |
385 | /* FALLTHROUGH */ |
386 | default: |
387 | addch: if (p < ebp) { |
388 | *p++ = ch; |
389 | break; |
390 | } |
391 | |
392 | /* If only one argument, not enough buffer space. */ |
393 | if (bxp == xp) |
394 | errx(1, "insufficient space for argument"); |
395 | /* Didn't hit argument limit, so if xflag object. */ |
396 | if (xflag) |
397 | errx(1, "insufficient space for arguments"); |
398 | |
399 | if (jfound) { |
400 | for (avj = argv; *avj; avj++) |
401 | *xp++ = *avj; |
402 | } |
403 | prerun(argc, av); |
404 | xp = bxp; |
405 | cnt = ebp - argp; |
406 | memmove(bbp, argp, (size_t)cnt); |
407 | p = (argp = bbp) + cnt; |
408 | *p++ = ch; |
409 | break; |
410 | } |
411 | hadblank = hasblank; |
412 | } |
413 | |
414 | /* |
415 | * Do things necessary before run()'ing, such as -I substitution, |
416 | * and then call run(). |
417 | */ |
418 | static void |
419 | prerun(int argc, char *argv[]) |
420 | { |
421 | char **tmp, **tmp2, **avj; |
422 | int repls; |
423 | |
424 | repls = Rflag; |
425 | runeof = 0; |
426 | |
427 | if (argc == 0 || repls == 0) { |
428 | *xp = NULL((void *)0); |
429 | run(argv); |
430 | return; |
431 | } |
432 | |
433 | avj = argv; |
434 | |
435 | /* |
436 | * Allocate memory to hold the argument list, and |
437 | * a NULL at the tail. |
438 | */ |
439 | tmp = calloc(argc + 1, sizeof(char *)); |
440 | if (tmp == NULL((void *)0)) |
441 | err(1, NULL((void *)0)); |
442 | tmp2 = tmp; |
443 | |
444 | /* |
445 | * Save the first argument and iterate over it, we |
446 | * cannot do strnsubst() to it. |
447 | */ |
448 | if ((*tmp++ = strdup(*avj++)) == NULL((void *)0)) |
449 | err(1, NULL((void *)0)); |
450 | |
451 | /* |
452 | * For each argument to utility, if we have not used up |
453 | * the number of replacements we are allowed to do, and |
454 | * if the argument contains at least one occurrence of |
455 | * replstr, call strnsubst(), else just save the string. |
456 | * Iterations over elements of avj and tmp are done |
457 | * where appropriate. |
458 | */ |
459 | while (--argc) { |
460 | *tmp = *avj++; |
461 | if (repls && strstr(*tmp, replstr) != NULL((void *)0)) { |
462 | strnsubst(tmp++, replstr, inpline, (size_t)255); |
463 | if (repls > 0) |
464 | repls--; |
465 | } else { |
466 | if ((*tmp = strdup(*tmp)) == NULL((void *)0)) |
467 | err(1, NULL((void *)0)); |
468 | tmp++; |
469 | } |
470 | } |
471 | |
472 | /* |
473 | * Run it. |
474 | */ |
475 | *tmp = NULL((void *)0); |
476 | run(tmp2); |
477 | |
478 | /* |
479 | * Walk from the tail to the head, free along the way. |
480 | */ |
481 | for (; tmp2 != tmp; tmp--) |
482 | free(*tmp); |
483 | /* |
484 | * Now free the list itself. |
485 | */ |
486 | free(tmp2); |
487 | |
488 | /* |
489 | * Free the input line buffer, if we have one. |
490 | */ |
491 | free(inpline); |
492 | inpline = NULL((void *)0); |
493 | } |
494 | |
495 | static void |
496 | run(char **argv) |
497 | { |
498 | pid_t pid; |
499 | int fd; |
500 | char **avec; |
501 | |
502 | /* |
503 | * If the user wants to be notified of each command before it is |
504 | * executed, notify them. If they want the notification to be |
505 | * followed by a prompt, then prompt them. |
506 | */ |
507 | if (tflag || pflag) { |
508 | fprintf(stderr(&__sF[2]), "%s", *argv); |
509 | for (avec = argv + 1; *avec != NULL((void *)0); ++avec) |
510 | fprintf(stderr(&__sF[2]), " %s", *avec); |
511 | /* |
512 | * If the user has asked to be prompted, do so. |
513 | */ |
514 | if (pflag) |
515 | /* |
516 | * If they asked not to exec, return without execution |
517 | * but if they asked to, go to the execution. If we |
518 | * could not open their tty, break the switch and drop |
519 | * back to -t behaviour. |
520 | */ |
521 | switch (prompt()) { |
522 | case 0: |
523 | return; |
524 | case 1: |
525 | goto exec; |
526 | case 2: |
527 | break; |
528 | } |
529 | fprintf(stderr(&__sF[2]), "\n"); |
530 | fflush(stderr(&__sF[2])); |
531 | } |
532 | exec: |
533 | switch (pid = vfork()) { |
Although the value stored to 'pid' is used in the enclosing expression, the value is never actually read from 'pid' | |
534 | case -1: |
535 | err(1, "vfork"); |
536 | case 0: |
537 | if (oflag) { |
538 | if ((fd = open(_PATH_TTY"/dev/tty", O_RDONLY0x0000)) == -1) { |
539 | warn("can't open /dev/tty"); |
540 | _exit(1); |
541 | } |
542 | } else { |
543 | fd = open(_PATH_DEVNULL"/dev/null", O_RDONLY0x0000); |
544 | } |
545 | if (fd > STDIN_FILENO0) { |
546 | if (dup2(fd, STDIN_FILENO0) != 0) { |
547 | warn("can't dup2 to stdin"); |
548 | _exit(1); |
549 | } |
550 | close(fd); |
551 | } |
552 | execvp(argv[0], argv); |
553 | warn("%s", argv[0]); |
554 | _exit(errno(*__errno()) == ENOENT2 ? 127 : 126); |
555 | } |
556 | curprocs++; |
557 | waitchildren(*argv, 0); |
558 | } |
559 | |
560 | static void |
561 | waitchildren(const char *name, int waitall) |
562 | { |
563 | pid_t pid; |
564 | int status; |
565 | |
566 | while ((pid = waitpid(-1, &status, !waitall && curprocs < maxprocs ? |
567 | WNOHANG0x01 : 0)) > 0) { |
568 | curprocs--; |
569 | /* |
570 | * According to POSIX, we have to exit if the utility exits |
571 | * with a 255 status, or is interrupted by a signal. |
572 | * We are allowed to return any exit status between 1 and |
573 | * 125 in these cases, but we'll use 124 and 125, the same |
574 | * values used by GNU xargs. |
575 | */ |
576 | if (WIFEXITED(status)(((status) & 0177) == 0)) { |
577 | if (WEXITSTATUS(status)(int)(((unsigned)(status) >> 8) & 0xff) == 255) { |
578 | warnx("%s exited with status 255", name); |
579 | exit(124); |
580 | } else if (WEXITSTATUS(status)(int)(((unsigned)(status) >> 8) & 0xff) == 127 || |
581 | WEXITSTATUS(status)(int)(((unsigned)(status) >> 8) & 0xff) == 126) { |
582 | exit(WEXITSTATUS(status)(int)(((unsigned)(status) >> 8) & 0xff)); |
583 | } else if (WEXITSTATUS(status)(int)(((unsigned)(status) >> 8) & 0xff) != 0) { |
584 | rval = 123; |
585 | } |
586 | } else if (WIFSIGNALED(status)(((status) & 0177) != 0177 && ((status) & 0177 ) != 0)) { |
587 | if (WTERMSIG(status)(((status) & 0177)) != SIGPIPE13) { |
588 | if (WTERMSIG(status)(((status) & 0177)) < NSIG33) |
589 | warnx("%s terminated by SIG%s", name, |
590 | sys_signame[WTERMSIG(status)(((status) & 0177))]); |
591 | else |
592 | warnx("%s terminated by signal %d", |
593 | name, WTERMSIG(status)(((status) & 0177))); |
594 | } |
595 | exit(125); |
596 | } |
597 | } |
598 | if (pid == -1 && errno(*__errno()) != ECHILD10) |
599 | err(1, "waitpid"); |
600 | } |
601 | |
602 | /* |
603 | * Prompt the user about running a command. |
604 | */ |
605 | static int |
606 | prompt(void) |
607 | { |
608 | size_t rsize; |
609 | char *response; |
610 | FILE *ttyfp; |
611 | int doit = 0; |
612 | |
613 | if ((ttyfp = fopen(_PATH_TTY"/dev/tty", "r")) == NULL((void *)0)) |
614 | return (2); /* Indicate that the TTY failed to open. */ |
615 | fprintf(stderr(&__sF[2]), "?..."); |
616 | fflush(stderr(&__sF[2])); |
617 | response = fgetln(ttyfp, &rsize); |
618 | doit = response != NULL((void *)0) && (*response == 'y' || *response == 'Y'); |
619 | fclose(ttyfp); |
620 | return (doit); |
621 | } |
622 | |
623 | static void |
624 | usage(void) |
625 | { |
626 | fprintf(stderr(&__sF[2]), |
627 | "usage: xargs [-0oprt] [-E eofstr] [-I replstr [-R replacements]] [-J replstr]\n" |
628 | " [-L number] [-n number [-x]] [-P maxprocs] [-s size]\n" |
629 | " [utility [argument ...]]\n"); |
630 | exit(1); |
631 | } |