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fsck.c revision 1.12 
      1 /*	$NetBSD: fsck.c,v 1.12 1997/09/14 14:11:00 lukem 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 #include <sys/cdefs.h>
     42 #ifndef lint
     43 __RCSID("$NetBSD: fsck.c,v 1.12 1997/09/14 14:11:00 lukem Exp $");
     44 #endif /* not lint */
     45 
     46 #include <sys/param.h>
     47 #include <sys/mount.h>
     48 #include <sys/queue.h>
     49 #include <sys/wait.h>
     50 #define DKTYPENAMES
     51 #include <sys/disklabel.h>
     52 #include <sys/ioctl.h>
     53 
     54 #include <err.h>
     55 #include <errno.h>
     56 #include <fstab.h>
     57 #include <fcntl.h>
     58 #include <signal.h>
     59 #include <stdio.h>
     60 #include <stdlib.h>
     61 #include <string.h>
     62 #include <unistd.h>
     63 
     64 #include "pathnames.h"
     65 #include "fsutil.h"
     66 
     67 static enum { IN_LIST, NOT_IN_LIST } which = NOT_IN_LIST;
     68 
     69 TAILQ_HEAD(fstypelist, entry) opthead, selhead;
     70 
     71 struct entry {
     72 	char *type;
     73 	char *options;
     74 	TAILQ_ENTRY(entry) entries;
     75 };
     76 
     77 static int maxrun = 0;
     78 static char *options = NULL;
     79 static int flags = 0;
     80 
     81 int main __P((int, char *[]));
     82 
     83 static int checkfs __P((const char *, const char *, const char *, void *,
     84     pid_t *));
     85 static int selected __P((const char *));
     86 static void addoption __P((char *));
     87 static const char *getoptions __P((const char *));
     88 static void addentry __P((struct fstypelist *, const char *, const char *));
     89 static void maketypelist __P((char *));
     90 static char *catopt __P((char *, const char *, int));
     91 static void mangle __P((char *, int *, const char ***, int *));
     92 static char *getfslab __P((const char *));
     93 static void usage __P((void));
     94 static void *isok __P((struct fstab *));
     95 
     96 int
     97 main(argc, argv)
     98 	int argc;
     99 	char *argv[];
    100 {
    101 	struct fstab *fs;
    102 	int i, rval = 0;
    103 	char *vfstype = NULL;
    104 	char globopt[3];
    105 
    106 	globopt[0] = '-';
    107 	globopt[2] = '\0';
    108 
    109 	TAILQ_INIT(&selhead);
    110 	TAILQ_INIT(&opthead);
    111 
    112 	while ((i = getopt(argc, argv, "dvpfnyl:t:T:")) != -1)
    113 		switch (i) {
    114 		case 'd':
    115 			flags |= CHECK_DEBUG;
    116 			break;
    117 
    118 		case 'v':
    119 			flags |= CHECK_VERBOSE;
    120 			break;
    121 
    122 		case 'p':
    123 			flags |= CHECK_PREEN;
    124 			/*FALLTHROUGH*/
    125 		case 'n':
    126 		case 'f':
    127 		case 'y':
    128 			globopt[1] = i;
    129 			options = catopt(options, globopt, 1);
    130 			break;
    131 
    132 		case 'l':
    133 			maxrun = atoi(optarg);
    134 			break;
    135 
    136 		case 'T':
    137 			if (*optarg)
    138 				addoption(optarg);
    139 			break;
    140 
    141 		case 't':
    142 			if (selhead.tqh_first != NULL)
    143 				errx(1, "only one -t option may be specified.");
    144 
    145 			maketypelist(optarg);
    146 			vfstype = optarg;
    147 			break;
    148 
    149 		case '?':
    150 		default:
    151 			usage();
    152 			/* NOTREACHED */
    153 		}
    154 
    155 	argc -= optind;
    156 	argv += optind;
    157 
    158 	if (argc == 0)
    159 		return checkfstab(flags, maxrun, isok, checkfs);
    160 
    161 #define	BADTYPE(type)							\
    162 	(strcmp(type, FSTAB_RO) &&					\
    163 	    strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ))
    164 
    165 
    166 	for (; argc--; argv++) {
    167 		char *spec, *type;
    168 
    169 		if ((fs = getfsfile(*argv)) == NULL &&
    170 		    (fs = getfsspec(*argv)) == NULL) {
    171 			if (vfstype == NULL)
    172 				vfstype = getfslab(*argv);
    173 			spec = *argv;
    174 			type = vfstype;
    175 		}
    176 		else {
    177 			spec = fs->fs_spec;
    178 			type = fs->fs_vfstype;
    179 			if (BADTYPE(fs->fs_type))
    180 				errx(1, "%s has unknown file system type.",
    181 				    *argv);
    182 		}
    183 
    184 		rval |= checkfs(type, blockcheck(spec), *argv, NULL, NULL);
    185 	}
    186 
    187 	return rval;
    188 }
    189 
    190 
    191 static void *
    192 isok(fs)
    193 	struct fstab *fs;
    194 {
    195 	if (fs->fs_passno == 0)
    196 		return NULL;
    197 
    198 	if (BADTYPE(fs->fs_type))
    199 		return NULL;
    200 
    201 	if (!selected(fs->fs_vfstype))
    202 		return NULL;
    203 
    204 	return fs;
    205 }
    206 
    207 
    208 static int
    209 checkfs(vfstype, spec, mntpt, auxarg, pidp)
    210 	const char *vfstype, *spec, *mntpt;
    211 	void *auxarg;
    212 	pid_t *pidp;
    213 {
    214 	/* List of directories containing fsck_xxx subcommands. */
    215 	static const char *edirs[] = {
    216 		_PATH_SBIN,
    217 		_PATH_USRSBIN,
    218 		NULL
    219 	};
    220 	char execbase[MAXPATHLEN];
    221 	const char **argv, **edir;
    222 	pid_t pid;
    223 	int argc = 1, i, status, maxargc;
    224 	char *optbuf = NULL, execname[MAXPATHLEN + 1];
    225 	const char *extra = getoptions(vfstype);
    226 
    227 
    228 #ifdef __GNUC__
    229 	/* Avoid vfork clobbering */
    230 	(void) &optbuf;
    231 	(void) &vfstype;
    232 #endif
    233 
    234 	if (strcmp(vfstype, "ufs") == 0)
    235 		vfstype = MOUNT_UFS;
    236 
    237 	maxargc = 100;
    238 	argv = emalloc(sizeof(char *) * maxargc);
    239 
    240 	/* construct basename of executable and argv[0] simultaneously */
    241 	(void) snprintf(execbase, sizeof(execbase), "fsck_%s", vfstype);
    242 	argv[0] = vfstype;
    243 
    244 	if (options) {
    245 		if (extra != NULL)
    246 			optbuf = catopt(options, extra, 0);
    247 		else
    248 			optbuf = estrdup(options);
    249 	}
    250 	else if (extra)
    251 		optbuf = estrdup(extra);
    252 
    253 	if (optbuf)
    254 		mangle(optbuf, &argc, &argv, &maxargc);
    255 
    256 	argv[argc++] = spec;
    257 	argv[argc] = NULL;
    258 
    259 	if (flags & (CHECK_DEBUG|CHECK_VERBOSE)) {
    260 		(void)printf("start %s %swait", mntpt,
    261 			pidp ? "no" : "");
    262 		for (i = 0; i < argc; i++)
    263 			(void)printf(" %s", argv[i]);
    264 		(void)printf("\n");
    265 	}
    266 
    267 	switch (pid = vfork()) {
    268 	case -1:				/* Error. */
    269 		warn("vfork");
    270 		if (optbuf)
    271 			free(optbuf);
    272 		return (1);
    273 
    274 	case 0:					/* Child. */
    275 		if (flags & CHECK_DEBUG)
    276 			_exit(0);
    277 
    278 		/* Go find an executable. */
    279 		edir = edirs;
    280 		do {
    281 			(void)snprintf(execname,
    282 			    sizeof(execname), "%s/%s", *edir, execbase);
    283 			execv(execname, (char * const *)argv);
    284 			if (errno != ENOENT)
    285 				if (spec)
    286 					warn("exec %s for %s", execname, spec);
    287 				else
    288 					warn("exec %s", execname);
    289 		} while (*++edir != NULL);
    290 
    291 		if (errno == ENOENT)
    292 			if (spec)
    293 				warn("exec %s for %s", execname, spec);
    294 			else
    295 				warn("exec %s", execname);
    296 		_exit(1);
    297 		/* NOTREACHED */
    298 
    299 	default:				/* Parent. */
    300 		if (optbuf)
    301 			free(optbuf);
    302 
    303 		if (pidp) {
    304 			*pidp = pid;
    305 			return 0;
    306 		}
    307 
    308 		if (waitpid(pid, &status, 0) < 0) {
    309 			warn("waitpid");
    310 			return (1);
    311 		}
    312 
    313 		if (WIFEXITED(status)) {
    314 			if (WEXITSTATUS(status) != 0)
    315 				return (WEXITSTATUS(status));
    316 		}
    317 		else if (WIFSIGNALED(status)) {
    318 			warnx("%s: %s", spec, strsignal(WTERMSIG(status)));
    319 			return (1);
    320 		}
    321 		break;
    322 	}
    323 
    324 	return (0);
    325 }
    326 
    327 
    328 static int
    329 selected(type)
    330 	const char *type;
    331 {
    332 	struct entry *e;
    333 
    334 	/* If no type specified, it's always selected. */
    335 	for (e = selhead.tqh_first; e != NULL; e = e->entries.tqe_next)
    336 		if (!strncmp(e->type, type, MFSNAMELEN))
    337 			return which == IN_LIST ? 1 : 0;
    338 
    339 	return which == IN_LIST ? 0 : 1;
    340 }
    341 
    342 
    343 static const char *
    344 getoptions(type)
    345 	const char *type;
    346 {
    347 	struct entry *e;
    348 
    349 	for (e = opthead.tqh_first; e != NULL; e = e->entries.tqe_next)
    350 		if (!strncmp(e->type, type, MFSNAMELEN))
    351 			return e->options;
    352 	return "";
    353 }
    354 
    355 
    356 static void
    357 addoption(optstr)
    358 	char *optstr;
    359 {
    360 	char *newoptions;
    361 	struct entry *e;
    362 
    363 	if ((newoptions = strchr(optstr, ':')) == NULL)
    364 		errx(1, "Invalid option string");
    365 
    366 	*newoptions++ = '\0';
    367 
    368 	for (e = opthead.tqh_first; e != NULL; e = e->entries.tqe_next)
    369 		if (!strncmp(e->type, optstr, MFSNAMELEN)) {
    370 			e->options = catopt(e->options, newoptions, 1);
    371 			return;
    372 		}
    373 	addentry(&opthead, optstr, newoptions);
    374 }
    375 
    376 
    377 static void
    378 addentry(list, type, opts)
    379 	struct fstypelist *list;
    380 	const char *type;
    381 	const char *opts;
    382 {
    383 	struct entry *e;
    384 
    385 	e = emalloc(sizeof(struct entry));
    386 	e->type = estrdup(type);
    387 	e->options = estrdup(opts);
    388 	TAILQ_INSERT_TAIL(list, e, entries);
    389 }
    390 
    391 
    392 static void
    393 maketypelist(fslist)
    394 	char *fslist;
    395 {
    396 	char *ptr;
    397 
    398 	if ((fslist == NULL) || (fslist[0] == '\0'))
    399 		errx(1, "empty type list");
    400 
    401 	if (fslist[0] == 'n' && fslist[1] == 'o') {
    402 		fslist += 2;
    403 		which = NOT_IN_LIST;
    404 	}
    405 	else
    406 		which = IN_LIST;
    407 
    408 	while ((ptr = strsep(&fslist, ",")) != NULL)
    409 		addentry(&selhead, ptr, "");
    410 
    411 }
    412 
    413 
    414 static char *
    415 catopt(s0, s1, fr)
    416 	char *s0;
    417 	const char *s1;
    418 	int fr;
    419 {
    420 	size_t i;
    421 	char *cp;
    422 
    423 	if (s0 && *s0) {
    424 		i = strlen(s0) + strlen(s1) + 1 + 1;
    425 		cp = emalloc(i);
    426 		(void)snprintf(cp, i, "%s,%s", s0, s1);
    427 	}
    428 	else
    429 		cp = estrdup(s1);
    430 
    431 	if (s0 && fr)
    432 		free(s0);
    433 	return (cp);
    434 }
    435 
    436 
    437 static void
    438 mangle(opts, argcp, argvp, maxargcp)
    439 	char *opts;
    440 	int *argcp;
    441 	const char ***argvp;
    442 	int *maxargcp;
    443 {
    444 	char *p, *s;
    445 	int argc = *argcp, maxargc = *maxargcp;
    446 	const char **argv = *argvp;
    447 
    448 	argc = *argcp;
    449 	maxargc = *maxargcp;
    450 
    451 	for (s = opts; (p = strsep(&s, ",")) != NULL;) {
    452 		/* always leave space for one more argument and the NULL */
    453 		if (argc >= maxargc - 3) {
    454 			maxargc += 50;
    455 			argv = erealloc(argv, maxargc * sizeof(char *));
    456 		}
    457 		if (*p != '\0')
    458 			if (*p == '-') {
    459 				argv[argc++] = p;
    460 				p = strchr(p, '=');
    461 				if (p) {
    462 					*p = '\0';
    463 					argv[argc++] = p+1;
    464 				}
    465 			}
    466 			else {
    467 				argv[argc++] = "-o";
    468 				argv[argc++] = p;
    469 			}
    470 	}
    471 
    472 	*argcp = argc;
    473 	*argvp = argv;
    474 	*maxargcp = maxargc;
    475 }
    476 
    477 
    478 static char *
    479 getfslab(str)
    480 	const char *str;
    481 {
    482 	struct disklabel dl;
    483 	int fd;
    484 	char p, *vfstype;
    485 	u_char t;
    486 
    487 	/* deduce the filesystem type from the disk label */
    488 	if ((fd = open(str, O_RDONLY)) == -1)
    489 		err(1, "cannot open `%s'", str);
    490 
    491 	if (ioctl(fd, DIOCGDINFO, &dl) == -1)
    492 		err(1, "cannot get disklabel for `%s'", str);
    493 
    494 	(void) close(fd);
    495 
    496 	p = str[strlen(str) - 1];
    497 
    498 	if ((p - 'a') >= dl.d_npartitions)
    499 		errx(1, "partition `%s' is not defined on disk", str);
    500 
    501 	if ((t = dl.d_partitions[p - 'a'].p_fstype) >= DKMAXTYPES)
    502 		errx(1, "partition `%s' is not of a legal vfstype",
    503 		    str);
    504 
    505 	if ((vfstype = fscknames[t]) == NULL)
    506 		errx(1, "vfstype `%s' on partition `%s' is not supported",
    507 		    fstypenames[t], str);
    508 
    509 	return vfstype;
    510 }
    511 
    512 
    513 static void
    514 usage()
    515 {
    516 	extern char *__progname;
    517 	static const char common[] =
    518 	    "[-dpvlyn] [-T fstype:fsoptions] [-t fstype]";
    519 
    520 	(void)fprintf(stderr, "Usage: %s %s [special|node]...\n",
    521 	    __progname, common);
    522 	exit(1);
    523 }
    524