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fsck.c revision 1.5 
      1 /*	$NetBSD: fsck.c,v 1.5 1996/09/28 19:21:41 christos Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1996 Christos Zoulas. All rights reserved.
      5  * Copyright (c) 1980, 1989, 1993, 1994
      6  *	The Regents of the University of California.  All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *	This product includes software developed by the University of
     19  *	California, Berkeley and its contributors.
     20  * 4. Neither the name of the University nor the names of its contributors
     21  *    may be used to endorse or promote products derived from this software
     22  *    without specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  *
     36  * From: @(#)mount.c	8.19 (Berkeley) 4/19/94
     37  * From: NetBSD: mount.c,v 1.24 1995/11/18 03:34:29 cgd Exp
     38  *
     39  */
     40 
     41 static char rcsid[] = "$NetBSD: fsck.c,v 1.5 1996/09/28 19:21:41 christos Exp $";
     42 
     43 #include <sys/param.h>
     44 #include <sys/mount.h>
     45 #include <sys/queue.h>
     46 #include <sys/wait.h>
     47 
     48 #include <err.h>
     49 #include <errno.h>
     50 #include <fstab.h>
     51 #include <signal.h>
     52 #include <stdio.h>
     53 #include <stdlib.h>
     54 #include <string.h>
     55 #include <unistd.h>
     56 
     57 #include "pathnames.h"
     58 #include "fsutil.h"
     59 
     60 static enum { IN_LIST, NOT_IN_LIST } which = NOT_IN_LIST;
     61 
     62 TAILQ_HEAD(fstypelist, entry) opthead, selhead;
     63 
     64 struct entry {
     65 	char *type;
     66 	char *options;
     67 	TAILQ_ENTRY(entry) entries;
     68 };
     69 
     70 static int maxrun = 0;
     71 static char *options = NULL;
     72 static int flags = 0;
     73 
     74 int main __P((int, char *[]));
     75 
     76 static int checkfs __P((const char *, const char *, const char *, void *,
     77     pid_t *));
     78 static int selected __P((const char *));
     79 static void addoption __P((char *));
     80 static const char *getoptions __P((const char *));
     81 static void addentry __P((struct fstypelist *, const char *, const char *));
     82 static void maketypelist __P((char *));
     83 static char *catopt __P((char *, const char *, int));
     84 static void mangle __P((char *, int *, const char **));
     85 static void usage __P((void));
     86 static void *isok __P((struct fstab *));
     87 
     88 
     89 int
     90 main(argc, argv)
     91 	int argc;
     92 	char *argv[];
     93 {
     94 	struct fstab *fs;
     95 	int i, rval = 0;
     96 	char *vfstype = NULL;
     97 
     98 	TAILQ_INIT(&selhead);
     99 	TAILQ_INIT(&opthead);
    100 
    101 	while ((i = getopt(argc, argv, "dvpnyl:t:T:")) != -1)
    102 		switch (i) {
    103 		case 'd':
    104 			flags |= CHECK_DEBUG;
    105 			break;
    106 
    107 		case 'v':
    108 			flags |= CHECK_VERBOSE;
    109 			break;
    110 
    111 		case 'y':
    112 			options = catopt(options, "-y", 1);
    113 			break;
    114 
    115 		case 'l':
    116 			maxrun = atoi(optarg);
    117 			break;
    118 
    119 		case 'n':
    120 			options = catopt(options, "-n", 1);
    121 			break;
    122 
    123 		case 'T':
    124 			if (*optarg)
    125 				addoption(optarg);
    126 			break;
    127 
    128 		case 't':
    129 			if (selhead.tqh_first != NULL)
    130 				errx(1, "only one -t option may be specified.");
    131 
    132 			maketypelist(optarg);
    133 			vfstype = optarg;
    134 			break;
    135 
    136 		case 'p':
    137 			options = catopt(options, "-p", 1);
    138 			flags |= CHECK_PREEN;
    139 			break;
    140 
    141 		case '?':
    142 		default:
    143 			usage();
    144 			/* NOTREACHED */
    145 		}
    146 
    147 	argc -= optind;
    148 	argv += optind;
    149 
    150 	if (argc == 0)
    151 		return checkfstab(flags, maxrun, isok, checkfs);
    152 
    153 #define	BADTYPE(type)							\
    154 	(strcmp(type, FSTAB_RO) &&					\
    155 	    strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ))
    156 
    157 
    158 	for (; argc--; argv++) {
    159 		char *spec, *type;
    160 
    161 		if ((fs = getfsfile(*argv)) == NULL &&
    162 		    (fs = getfsspec(*argv)) == NULL) {
    163 			if (vfstype == NULL)
    164 				errx(1,
    165 				    "%s: unknown special file or file system.",
    166 				    *argv);
    167 			spec = *argv;
    168 			type = vfstype;
    169 		}
    170 		else {
    171 			spec = fs->fs_spec;
    172 			type = fs->fs_vfstype;
    173 			if (BADTYPE(fs->fs_type))
    174 				errx(1, "%s has unknown file system type.",
    175 				    *argv);
    176 		}
    177 
    178 		rval |= checkfs(type, blockcheck(spec), *argv, NULL);
    179 	}
    180 
    181 	return rval;
    182 }
    183 
    184 
    185 static void *
    186 isok(fs)
    187 	struct fstab *fs;
    188 {
    189 	if (fs->fs_passno == 0)
    190 		return NULL;
    191 
    192 	if (BADTYPE(fs->fs_type))
    193 		return NULL;
    194 
    195 	if (!selected(fs->fs_vfstype))
    196 		return NULL;
    197 
    198 	return fs;
    199 }
    200 
    201 
    202 static int
    203 checkfs(vfstype, spec, mntpt, ap, pidp)
    204 	const char *vfstype, *spec, *mntpt;
    205 	void *auxarg;
    206 	pid_t *pidp;
    207 {
    208 	/* List of directories containing fsck_xxx subcommands. */
    209 	static const char *edirs[] = {
    210 		_PATH_SBIN,
    211 		_PATH_USRSBIN,
    212 		NULL
    213 	};
    214 	const char *argv[100], **edir;
    215 	pid_t pid;
    216 	int argc, i, status;
    217 	char *optbuf = NULL, execname[MAXPATHLEN + 1];
    218 	const char *extra = getoptions(vfstype);
    219 
    220 #ifdef __GNUC__
    221 	/* Avoid vfork clobbering */
    222 	(void) &optbuf;
    223 #endif
    224 
    225 	if (strcmp(vfstype, "ufs") == 0)
    226 		vfstype = MOUNT_UFS;
    227 
    228 	argc = 0;
    229 	argv[argc++] = vfstype;
    230 
    231 	if (options) {
    232 		if (extra != NULL)
    233 			optbuf = catopt(options, extra, 0);
    234 		else
    235 			optbuf = estrdup(options);
    236 	}
    237 	else if (extra)
    238 		optbuf = estrdup(extra);
    239 
    240 	if (optbuf)
    241 		mangle(optbuf, &argc, argv);
    242 
    243 	argv[argc++] = spec;
    244 
    245 	if (flags & (CHECK_DEBUG|CHECK_VERBOSE)) {
    246 		(void)printf("start %s %swait fsck_%s", mntpt,
    247 			pidp ? "no" : "", vfstype);
    248 		for (i = 1; i < argc; i++)
    249 			(void)printf(" %s", argv[i]);
    250 		(void)printf("\n");
    251 	}
    252 
    253 	switch (pid = vfork()) {
    254 	case -1:				/* Error. */
    255 		warn("vfork");
    256 		if (optbuf)
    257 			free(optbuf);
    258 		return (1);
    259 
    260 	case 0:					/* Child. */
    261 		if (flags & CHECK_DEBUG)
    262 			_exit(0);
    263 
    264 		/* Go find an executable. */
    265 		edir = edirs;
    266 		do {
    267 			(void)snprintf(execname,
    268 			    sizeof(execname), "%s/fsck_%s", *edir, vfstype);
    269 			execv(execname, (char * const *)argv);
    270 			if (errno != ENOENT)
    271 				if (spec)
    272 					warn("exec %s for %s", execname, spec);
    273 				else
    274 					warn("exec %s", execname);
    275 		} while (*++edir != NULL);
    276 
    277 		if (errno == ENOENT)
    278 			if (spec)
    279 				warn("exec %s for %s", execname, spec);
    280 			else
    281 				warn("exec %s", execname);
    282 		exit(1);
    283 		/* NOTREACHED */
    284 
    285 	default:				/* Parent. */
    286 		if (optbuf)
    287 			free(optbuf);
    288 
    289 		if (pidp) {
    290 			*pidp = pid;
    291 			return 0;
    292 		}
    293 
    294 		if (waitpid(pid, &status, 0) < 0) {
    295 			warn("waitpid");
    296 			return (1);
    297 		}
    298 
    299 		if (WIFEXITED(status)) {
    300 			if (WEXITSTATUS(status) != 0)
    301 				return (WEXITSTATUS(status));
    302 		}
    303 		else if (WIFSIGNALED(status)) {
    304 			warnx("%s: %s", spec, strsignal(WTERMSIG(status)));
    305 			return (1);
    306 		}
    307 		break;
    308 	}
    309 
    310 	return (0);
    311 }
    312 
    313 
    314 static int
    315 selected(type)
    316 	const char *type;
    317 {
    318 	struct entry *e;
    319 
    320 	/* If no type specified, it's always selected. */
    321 	for (e = selhead.tqh_first; e != NULL; e = e->entries.tqe_next)
    322 		if (!strncmp(e->type, type, MFSNAMELEN))
    323 			return which == IN_LIST ? 1 : 0;
    324 
    325 	return which == IN_LIST ? 0 : 1;
    326 }
    327 
    328 
    329 static const char *
    330 getoptions(type)
    331 	const char *type;
    332 {
    333 	struct entry *e;
    334 
    335 	for (e = opthead.tqh_first; e != NULL; e = e->entries.tqe_next)
    336 		if (!strncmp(e->type, type, MFSNAMELEN))
    337 			return e->options;
    338 	return "";
    339 }
    340 
    341 
    342 static void
    343 addoption(optstr)
    344 	char *optstr;
    345 {
    346 	char *newoptions;
    347 	struct entry *e;
    348 
    349 	if ((newoptions = strchr(optstr, ':')) == NULL)
    350 		errx(1, "Invalid option string");
    351 
    352 	*newoptions++ = '\0';
    353 
    354 	for (e = opthead.tqh_first; e != NULL; e = e->entries.tqe_next)
    355 		if (!strncmp(e->type, optstr, MFSNAMELEN)) {
    356 			e->options = catopt(e->options, newoptions, 1);
    357 			return;
    358 		}
    359 	addentry(&opthead, optstr, newoptions);
    360 }
    361 
    362 
    363 static void
    364 addentry(list, type, opts)
    365 	struct fstypelist *list;
    366 	const char *type;
    367 	const char *opts;
    368 {
    369 	struct entry *e;
    370 
    371 	e = emalloc(sizeof(struct entry));
    372 	e->type = estrdup(type);
    373 	e->options = estrdup(opts);
    374 	TAILQ_INSERT_TAIL(list, e, entries);
    375 }
    376 
    377 
    378 static void
    379 maketypelist(fslist)
    380 	char *fslist;
    381 {
    382 	char *ptr;
    383 
    384 	if ((fslist == NULL) || (fslist[0] == '\0'))
    385 		errx(1, "empty type list");
    386 
    387 	if (fslist[0] == 'n' && fslist[1] == 'o') {
    388 		fslist += 2;
    389 		which = NOT_IN_LIST;
    390 	}
    391 	else
    392 		which = IN_LIST;
    393 
    394 	while ((ptr = strsep(&fslist, ",")) != NULL)
    395 		addentry(&selhead, ptr, "");
    396 
    397 }
    398 
    399 
    400 static char *
    401 catopt(s0, s1, fr)
    402 	char *s0;
    403 	const char *s1;
    404 	int fr;
    405 {
    406 	size_t i;
    407 	char *cp;
    408 
    409 	if (s0 && *s0) {
    410 		i = strlen(s0) + strlen(s1) + 1 + 1;
    411 		cp = emalloc(i);
    412 		(void)snprintf(cp, i, "%s,%s", s0, s1);
    413 	}
    414 	else
    415 		cp = estrdup(s1);
    416 
    417 	if (s0 && fr)
    418 		free(s0);
    419 	return (cp);
    420 }
    421 
    422 
    423 static void
    424 mangle(opts, argcp, argv)
    425 	char *opts;
    426 	int *argcp;
    427 	const char **argv;
    428 {
    429 	char *p, *s;
    430 	int argc;
    431 
    432 	argc = *argcp;
    433 	for (s = opts; (p = strsep(&s, ",")) != NULL;)
    434 		if (*p != '\0')
    435 			if (*p == '-') {
    436 				argv[argc++] = p;
    437 				p = strchr(p, '=');
    438 				if (p) {
    439 					*p = '\0';
    440 					argv[argc++] = p+1;
    441 				}
    442 			}
    443 			else {
    444 				argv[argc++] = "-o";
    445 				argv[argc++] = p;
    446 			}
    447 
    448 	*argcp = argc;
    449 }
    450 
    451 
    452 static void
    453 usage()
    454 {
    455 	extern char *__progname;
    456 	static const char common[] =
    457 	    "[-dpvlyn] [-T fstype:fsoptions] [-t fstype]";
    458 
    459 	(void)fprintf(stderr, "Usage: %s %s [special|node]...\n",
    460 	    __progname, common);
    461 	exit(1);
    462 }
    463