]> git.wh0rd.org - dump.git/blob - restore/main.c
Relicensed dump/restore under the revised BSD license, as per ftp://ftp.cs.berkeley...
[dump.git] / restore / main.c
1 /*
2 * Ported to Linux's Second Extended File System as part of the
3 * dump and restore backup suit
4 * Remy Card <card@Linux.EU.Org>, 1994-1997
5 * Stelian Pop <stelian@popies.net>, 1999-2000
6 * Stelian Pop <stelian@popies.net> - AlcĂ´ve <www.alcove.com>, 2000-2002
7 */
8
9 /*
10 * Copyright (c) 1983, 1993
11 * The Regents of the University of California. All rights reserved.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 */
37
38 #ifndef lint
39 static const char rcsid[] =
40 "$Id: main.c,v 1.44 2003/03/30 15:40:38 stelian Exp $";
41 #endif /* not lint */
42
43 #include <config.h>
44 #include <compatlfs.h>
45 #include <fcntl.h>
46 #include <sys/param.h>
47 #include <sys/stat.h>
48 #include <errno.h>
49
50 #ifdef __linux__
51 #include <sys/time.h>
52 #include <time.h>
53 #ifdef HAVE_EXT2FS_EXT2_FS_H
54 #include <ext2fs/ext2_fs.h>
55 #else
56 #include <linux/ext2_fs.h>
57 #endif
58 #include <bsdcompat.h>
59 #include <signal.h>
60 #include <string.h>
61 #else /* __linux__ */
62 #include <ufs/ufs/dinode.h>
63 #endif /* __linux__ */
64 #include <protocols/dumprestore.h>
65
66 #include <compaterr.h>
67 #include <stdio.h>
68 #include <stdlib.h>
69 #include <unistd.h>
70
71 #ifdef __linux__
72 #include <ext2fs/ext2fs.h>
73 #include <getopt.h>
74 #endif
75
76 #include "pathnames.h"
77 #include "restore.h"
78 #include "extern.h"
79
80 int aflag = 0, bflag = 0, cvtflag = 0, dflag = 0, vflag = 0, yflag = 0;
81 int hflag = 1, mflag = 1, Mflag = 0, Nflag = 0, Vflag = 0, zflag = 0;
82 int uflag = 0, lflag = 0, Lflag = 0, oflag = 0;
83 char *Afile = NULL;
84 int dokerberos = 0;
85 char command = '\0';
86 long dumpnum = 1;
87 long volno = 0;
88 long ntrec;
89 char *dumpmap = NULL;
90 char *usedinomap = NULL;
91 dump_ino_t maxino;
92 time_t dumptime;
93 time_t dumpdate;
94 FILE *terminal;
95 char *tmpdir;
96 int compare_ignore_not_found;
97 int compare_errors;
98 char filesys[NAMELEN];
99 static const char *stdin_opt = NULL;
100 char *bot_script = NULL;
101 dump_ino_t volinfo[TP_NINOS];
102
103 #ifdef USE_QFA
104 FILE *gTapeposfp;
105 char *gTapeposfile;
106 char gTps[255];
107 long gSeekstart;
108 int tapeposflag;
109 int gTapeposfd;
110 int createtapeposflag;
111 unsigned long qfadumpdate;
112 long long curtapepos;
113 #endif /* USE_QFA */
114
115 #if defined(__linux__) || defined(sunos)
116 char *__progname;
117 #endif
118
119 static void obsolete __P((int *, char **[]));
120 static void usage __P((void));
121 static void use_stdin __P((const char *));
122
123 #define FORCED_UMASK (077)
124
125 int
126 main(int argc, char *argv[])
127 {
128 int ch;
129 dump_ino_t ino;
130 char *inputdev = _PATH_DEFTAPE;
131 char *symtbl = "./restoresymtable";
132 char *p, name[MAXPATHLEN];
133 FILE *filelist = NULL;
134 char fname[MAXPATHLEN];
135 mode_t orig_umask;
136 #ifdef DEBUG_QFA
137 time_t tistart, tiend, titaken;
138 #endif
139 #ifdef USE_QFA
140 tapeposflag = 0;
141 createtapeposflag = 0;
142 #endif /* USE_QFA */
143
144 /* Temp files should *not* be readable. We set permissions later. */
145 orig_umask = umask(FORCED_UMASK);
146 filesys[0] = '\0';
147 #if defined(__linux__) || defined(sunos)
148 __progname = argv[0];
149 #endif
150
151 if (argc < 2)
152 usage();
153
154 if ((inputdev = getenv("TAPE")) == NULL)
155 inputdev = _PATH_DEFTAPE;
156 if ((tmpdir = getenv("TMPDIR")) == NULL)
157 tmpdir = _PATH_TMP;
158 if ((tmpdir = strdup(tmpdir)) == NULL)
159 err(1, "malloc tmpdir");
160 for (p = tmpdir + strlen(tmpdir) - 1; p >= tmpdir && *p == '/'; p--)
161 ;
162 obsolete(&argc, &argv);
163 while ((ch = getopt(argc, argv,
164 "aA:b:CcdD:f:F:hi"
165 #ifdef KERBEROS
166 "k"
167 #endif
168 "lL:mMNo"
169 #ifdef USE_QFA
170 "P:Q:"
171 #endif
172 "Rrs:tT:uvVxX:y")) != -1)
173 switch(ch) {
174 case 'a':
175 aflag = 1;
176 break;
177 case 'A':
178 Afile = optarg;
179 aflag = 1;
180 break;
181 case 'b':
182 /* Change default tape blocksize. */
183 bflag = 1;
184 ntrec = strtol(optarg, &p, 10);
185 if (*p)
186 errx(1, "illegal blocksize -- %s", optarg);
187 if (ntrec <= 0)
188 errx(1, "block size must be greater than 0");
189 break;
190 case 'c':
191 cvtflag = 1;
192 break;
193 case 'D':
194 strncpy(filesys, optarg, NAMELEN);
195 filesys[NAMELEN - 1] = '\0';
196 break;
197 case 'T':
198 tmpdir = optarg;
199 break;
200 case 'd':
201 dflag = 1;
202 break;
203 case 'f':
204 if( !strcmp(optarg,"-") )
205 use_stdin("-f");
206 inputdev = optarg;
207 break;
208 case 'F':
209 bot_script = optarg;
210 break;
211 case 'h':
212 hflag = 0;
213 break;
214 #ifdef KERBEROS
215 case 'k':
216 dokerberos = 1;
217 break;
218 #endif
219 case 'C':
220 case 'i':
221 #ifdef USE_QFA
222 case 'P':
223 #endif
224 case 'R':
225 case 'r':
226 case 't':
227 case 'x':
228 if (command != '\0')
229 errx(1,
230 "%c and %c options are mutually exclusive",
231 ch, command);
232 command = ch;
233 #ifdef USE_QFA
234 if (ch == 'P') {
235 gTapeposfile = optarg;
236 createtapeposflag = 1;
237 }
238 #endif
239
240 break;
241 case 'l':
242 lflag = 1;
243 break;
244 case 'L':
245 Lflag = strtol(optarg, &p, 10);
246 if (*p)
247 errx(1, "illegal limit -- %s", optarg);
248 if (Lflag < 0)
249 errx(1, "limit must be greater than 0");
250 break;
251 case 'm':
252 mflag = 0;
253 break;
254 case 'M':
255 Mflag = 1;
256 break;
257 case 'N':
258 Nflag = 1;
259 break;
260 case 'o':
261 oflag = 1;
262 break;
263 #ifdef USE_QFA
264 case 'Q':
265 gTapeposfile = optarg;
266 tapeposflag = 1;
267 aflag = 1;
268 break;
269 #endif
270 case 's':
271 /* Dumpnum (skip to) for multifile dump tapes. */
272 dumpnum = strtol(optarg, &p, 10);
273 if (*p)
274 errx(1, "illegal dump number -- %s", optarg);
275 if (dumpnum <= 0)
276 errx(1, "dump number must be greater than 0");
277 break;
278 case 'u':
279 uflag = 1;
280 break;
281 case 'v':
282 vflag = 1;
283 break;
284 case 'V':
285 Vflag = 1;
286 break;
287 case 'X':
288 if( !strcmp(optarg,"-") ) {
289 use_stdin("-X");
290 filelist = stdin;
291 }
292 else
293 if ( !(filelist = fopen(optarg,"r")) )
294 errx(1, "can't open file for reading -- %s", optarg);
295 break;
296 case 'y':
297 yflag = 1;
298 break;
299 default:
300 usage();
301 }
302 argc -= optind;
303 argv += optind;
304
305 if (command == '\0')
306 errx(1, "none of C, i, R, r, t or x options specified");
307
308 #ifdef USE_QFA
309 if (!mflag && tapeposflag)
310 errx(1, "m and Q options are mutually exclusive");
311
312 if (tapeposflag && command != 'i' && command != 'x' && command != 't')
313 errx(1, "Q option is not valid for %c command", command);
314 #endif
315
316 if (Afile && command != 'i' && command != 'x' && command != 't')
317 errx(1, "A option is not valid for %c command", command);
318
319 if (signal(SIGINT, onintr) == SIG_IGN)
320 (void) signal(SIGINT, SIG_IGN);
321 if (signal(SIGTERM, onintr) == SIG_IGN)
322 (void) signal(SIGTERM, SIG_IGN);
323 setlinebuf(stderr);
324
325 atexit(cleanup);
326
327 if (command == 'C' && inputdev[0] != '/' && strcmp(inputdev, "-")
328 #ifdef RRESTORE
329 && !strchr(inputdev, ':')
330 #endif
331 ) {
332 /* since we chdir into the directory we are comparing
333 * to, we must retain the full tape path */
334 char wd[MAXPATHLEN], fullpathinput[MAXPATHLEN];
335 if (!getcwd(wd, MAXPATHLEN))
336 err(1, "can't get current directory");
337 snprintf(fullpathinput, MAXPATHLEN, "%s/%s", wd, inputdev);
338 fullpathinput[MAXPATHLEN - 1] = '\0';
339 setinput(fullpathinput);
340 }
341 else
342 setinput(inputdev);
343
344 if (argc == 0 && !filelist) {
345 argc = 1;
346 *--argv = ".";
347 }
348
349 #ifdef USE_QFA
350 if (tapeposflag) {
351 msg("reading QFA positions from %s\n", gTapeposfile);
352 if ((gTapeposfp = fopen(gTapeposfile, "r")) == NULL)
353 errx(1, "can't open file for reading -- %s",
354 gTapeposfile);
355 /* start reading header info */
356 if (fgets(gTps, sizeof(gTps), gTapeposfp) == NULL)
357 errx(1, "not requested format of -- %s", gTapeposfile);
358 gTps[strlen(gTps) - 1] = 0; /* delete end of line */
359 if (strcmp(gTps, QFA_MAGIC) != 0)
360 errx(1, "not requested format of -- %s", gTapeposfile);
361 if (fgets(gTps, sizeof(gTps), gTapeposfp) == NULL)
362 errx(1, "not requested format of -- %s", gTapeposfile);
363 gTps[strlen(gTps) - 1] = 0;
364 if (strcmp(gTps, QFA_VERSION) != 0)
365 errx(1, "not requested format of -- %s", gTapeposfile);
366 /* read dumpdate */
367 if (fgets(gTps, sizeof(gTps), gTapeposfp) == NULL)
368 errx(1, "not requested format of -- %s", gTapeposfile);
369 gTps[strlen(gTps) - 1] = 0;
370 qfadumpdate = atol(gTps);
371 /* read empty line */
372 if (fgets(gTps, sizeof(gTps), gTapeposfp) == NULL)
373 errx(1, "not requested format of -- %s", gTapeposfile);
374 gTps[strlen(gTps) - 1] = 0;
375 /* read table header line */
376 if (fgets(gTps, sizeof(gTps), gTapeposfp) == NULL)
377 errx(1, "not requested format of -- %s", gTapeposfile);
378 gTps[strlen(gTps) - 1] = 0;
379 /* end reading header info */
380 /* tape position table starts here */
381 gSeekstart = ftell(gTapeposfp); /* remember for later use */
382 }
383 #endif /* USE_QFA */
384
385 switch (command) {
386 /*
387 * Compare contents of tape.
388 */
389 case 'C': {
390 struct STAT stbuf;
391
392 Vprintf(stdout, "Begin compare restore\n");
393 compare_ignore_not_found = 0;
394 compare_errors = 0;
395 setup();
396 printf("filesys = %s\n", filesys);
397 if (STAT(filesys, &stbuf) < 0)
398 err(1, "cannot stat directory %s", filesys);
399 if (chdir(filesys) < 0)
400 err(1, "cannot cd to %s", filesys);
401 compare_ignore_not_found = dumptime > 0;
402 initsymtable((char *)0);
403 extractdirs(0);
404 treescan(".", ROOTINO, nodeupdates);
405 compareleaves();
406 checkrestore();
407 if (compare_errors) {
408 printf("Some files were modified!\n");
409 exit(2);
410 }
411 break;
412 }
413
414 /*
415 * Interactive mode.
416 */
417 case 'i':
418 setup();
419 extractdirs(1);
420 initsymtable(NULL);
421 runcmdshell();
422 break;
423 /*
424 * Incremental restoration of a file system.
425 */
426 case 'r':
427 aflag = 1; /* in -r or -R mode, -a is default */
428 setup();
429 if (dumptime > 0) {
430 /*
431 * This is an incremental dump tape.
432 */
433 Vprintf(stdout, "Begin incremental restore\n");
434 initsymtable(symtbl);
435 extractdirs(1);
436 removeoldleaves();
437 Vprintf(stdout, "Calculate node updates.\n");
438 treescan(".", ROOTINO, nodeupdates);
439 findunreflinks();
440 removeoldnodes();
441 } else {
442 /*
443 * This is a level zero dump tape.
444 */
445 Vprintf(stdout, "Begin level 0 restore\n");
446 initsymtable((char *)0);
447 extractdirs(1);
448 Vprintf(stdout, "Calculate extraction list.\n");
449 treescan(".", ROOTINO, nodeupdates);
450 }
451 createleaves(symtbl);
452 createlinks();
453 setdirmodes(FORCE);
454 checkrestore();
455 if (dflag) {
456 Vprintf(stdout, "Verify the directory structure\n");
457 treescan(".", ROOTINO, verifyfile);
458 }
459 dumpsymtable(symtbl, (long)1);
460 break;
461 /*
462 * Resume an incremental file system restoration.
463 */
464 case 'R':
465 aflag = 1; /* in -r or -R mode, -a is default */
466 initsymtable(symtbl);
467 skipmaps();
468 skipdirs();
469 createleaves(symtbl);
470 createlinks();
471 setdirmodes(FORCE);
472 checkrestore();
473 dumpsymtable(symtbl, (long)1);
474 break;
475
476 /* handle file names from either text file (-X) or the command line */
477 #define NEXTFILE(p) \
478 p = NULL; \
479 if (argc) { \
480 --argc; \
481 p = *argv++; \
482 } \
483 else if (filelist) { \
484 if ((p = fgets(fname, MAXPATHLEN, filelist))) { \
485 if ( *p && *(p + strlen(p) - 1) == '\n' ) /* possible null string */ \
486 *(p + strlen(p) - 1) = '\0'; \
487 if ( !*p ) /* skip empty lines */ \
488 continue; \
489 } \
490 }
491
492 /*
493 * List contents of tape.
494 */
495 case 't':
496 setup();
497 extractdirs(0);
498 initsymtable((char *)0);
499 printvolinfo();
500 for (;;) {
501 NEXTFILE(p);
502 if (!p)
503 break;
504 canon(p, name, sizeof(name));
505 ino = dirlookup(name);
506 if (ino == 0)
507 continue;
508 treescan(name, ino, listfile);
509 }
510 break;
511 /*
512 * Batch extraction of tape contents.
513 */
514 case 'x':
515 #ifdef DEBUG_QFA
516 tistart = time(NULL);
517 #endif
518 setup();
519 extractdirs(1);
520 initsymtable((char *)0);
521 for (;;) {
522 NEXTFILE(p);
523 if (!p)
524 break;
525 canon(p, name, sizeof(name));
526 ino = dirlookup(name);
527 if (ino == 0)
528 continue;
529 if (mflag)
530 pathcheck(name);
531 treescan(name, ino, addfile);
532 }
533 createfiles();
534 createlinks();
535 setdirmodes(oflag ? FORCE : 0);
536 if (dflag)
537 checkrestore();
538 #ifdef DEBUG_QFA
539 tiend = time(NULL);
540 titaken = tiend - tistart;
541 msg("restore took %d:%02d:%02d\n", titaken / 3600,
542 (titaken % 3600) / 60, titaken % 60);
543 #endif /* DEBUG_QFA */
544 break;
545 #ifdef USE_QFA
546 case 'P':
547 #ifdef DEBUG_QFA
548 tistart = time(NULL);
549 #endif
550 setup();
551 msg("writing QFA positions to %s\n", gTapeposfile);
552 (void) umask(orig_umask);
553 if ((gTapeposfd = open(gTapeposfile, O_WRONLY|O_CREAT|O_TRUNC,
554 S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP
555 |S_IROTH|S_IWOTH)) < 0)
556 errx(1, "can't create tapeposfile\n");
557 (void) umask(FORCED_UMASK);
558 /* print QFA-file header */
559 sprintf(gTps, "%s\n%s\n%ld\n\n", QFA_MAGIC, QFA_VERSION,(unsigned long)spcl.c_date);
560 if (write(gTapeposfd, gTps, strlen(gTps)) != (ssize_t)strlen(gTps))
561 errx(1, "can't write tapeposfile\n");
562 sprintf(gTps, "ino\ttapeno\ttapepos\n");
563 if (write(gTapeposfd, gTps, strlen(gTps)) != (ssize_t)strlen(gTps))
564 errx(1, "can't write tapeposfile\n");
565
566 extractdirs(1);
567 initsymtable((char *)0);
568 for (;;) {
569 NEXTFILE(p);
570 if (!p)
571 break;
572 canon(p, name, sizeof(name));
573 ino = dirlookup(name);
574 if (ino == 0)
575 continue;
576 if (mflag)
577 pathcheck(name);
578 treescan(name, ino, addfile);
579 }
580 createfiles();
581 #ifdef DEBUG_QFA
582 tiend = time(NULL);
583 titaken = tiend - tistart;
584 msg("writing QFA positions took %d:%02d:%02d\n", titaken / 3600,
585 (titaken % 3600) / 60, titaken % 60);
586 #endif /* DEBUG_QFA */
587 break;
588 #endif /* USE_QFA */
589 }
590 exit(0);
591 /* NOTREACHED */
592 return 0; /* gcc shut up */
593 }
594
595 static void
596 usage(void)
597 {
598 char white[MAXPATHLEN];
599 const char *ext2ver, *ext2date;
600
601 memset(white, ' ', MAXPATHLEN);
602 white[MIN(strlen(__progname), MAXPATHLEN - 1)] = '\0';
603
604 #ifdef __linux__
605 ext2fs_get_library_version(&ext2ver, &ext2date);
606 (void)fprintf(stderr, "%s %s (using libext2fs %s of %s)\n",
607 __progname, _DUMP_VERSION, ext2ver, ext2date);
608 #else
609 (void)fprintf(stderr, "%s %s\n", __progname, _DUMP_VERSION);
610 #endif
611
612 #ifdef KERBEROS
613 #define kerbflag "k"
614 #else
615 #define kerbflag
616 #endif
617
618 #ifdef USE_QFA
619 #define qfaflag "[-Q file] "
620 #else
621 #define qfaflag
622 #endif
623
624 fprintf(stderr,
625 "usage:"
626 "\t%s -C [-cd" kerbflag "lMvVy] [-b blocksize] [-D filesystem] [-f file]\n"
627 "\t%s [-F script] [-L limit] [-s fileno]\n"
628 "\t%s -i [-acdh" kerbflag "lmMouvVy] [-A file] [-b blocksize] [-f file]\n"
629 "\t%s [-F script] " qfaflag "[-s fileno]\n"
630 #ifdef USE_QFA
631 "\t%s -P file [-acdh" kerbflag "lmMuvVy] [-A file] [-b blocksize]\n"
632 "\t%s [-f file] [-F script] [-s fileno] [-X filelist] [file ...]\n"
633 #endif
634 "\t%s -r [-cd" kerbflag "lMuvVy] [-b blocksize] [-f file] [-F script]\n"
635 "\t%s [-s fileno] [-T directory]\n"
636 "\t%s -R [-cd" kerbflag "lMuvVy] [-b blocksize] [-f file] [-F script]\n"
637 "\t%s [-s fileno] [-T directory]\n"
638 "\t%s -t [-cdh" kerbflag "lMuvVy] [-A file] [-b blocksize] [-f file]\n"
639 "\t%s [-F script] " qfaflag "[-s fileno] [-X filelist] [file ...]\n"
640 "\t%s -x [-acdh" kerbflag "lmMouvVy] [-A file] [-b blocksize] [-f file]\n"
641 "\t%s [-F script] " qfaflag "[-s fileno] [-X filelist] [file ...]\n",
642 __progname, white,
643 __progname, white,
644 #ifdef USE_QFA
645 __progname, white,
646 #endif
647 __progname, white,
648 __progname, white,
649 __progname, white,
650 __progname, white);
651 exit(1);
652 }
653
654 /*
655 * obsolete --
656 * Change set of key letters and ordered arguments into something
657 * getopt(3) will like.
658 */
659 static void
660 obsolete(int *argcp, char **argvp[])
661 {
662 int argc, flags;
663 char *ap, **argv, *flagsp = NULL, **nargv, *p = NULL;
664
665 /* Setup. */
666 argv = *argvp;
667 argc = *argcp;
668
669 /* Return if no arguments or first argument has leading dash. */
670 ap = argv[1];
671 if (argc == 1 || *ap == '-')
672 return;
673
674 /* Allocate space for new arguments. */
675 if ((*argvp = nargv = malloc((argc + 1) * sizeof(char *))) == NULL ||
676 (p = flagsp = malloc(strlen(ap) + 2)) == NULL)
677 err(1, "malloc args");
678
679 *nargv++ = *argv;
680 argv += 2, argc -= 2;
681
682 for (flags = 0; *ap; ++ap) {
683 switch (*ap) {
684 case 'A':
685 case 'b':
686 case 'D':
687 case 'f':
688 case 'F':
689 case 'L':
690 case 'Q':
691 case 's':
692 case 'T':
693 case 'X':
694 if (*argv == NULL) {
695 warnx("option requires an argument -- %c", *ap);
696 usage();
697 }
698 if ((nargv[0] = malloc(strlen(*argv) + 2 + 1)) == NULL)
699 err(1, "malloc arg");
700 nargv[0][0] = '-';
701 nargv[0][1] = *ap;
702 (void)strcpy(&nargv[0][2], *argv);
703 ++argv;
704 ++nargv;
705 break;
706 default:
707 if (!flags) {
708 *p++ = '-';
709 flags = 1;
710 }
711 *p++ = *ap;
712 break;
713 }
714 }
715
716 /* Terminate flags. */
717 if (flags) {
718 *p = '\0';
719 *nargv++ = flagsp;
720 }
721
722 /* Copy remaining arguments. */
723 while ((*nargv++ = *argv++));
724
725 /* Update argument count. */
726 *argcp = nargv - *argvp - 1;
727 }
728
729 /*
730 * use_stdin --
731 * reserve stdin for opt (avoid conflicts)
732 */
733 void
734 use_stdin(const char *opt)
735 {
736 if (stdin_opt)
737 errx(1, "can't handle standard input for both %s and %s",
738 stdin_opt, opt);
739 stdin_opt = opt;
740 }