Home | History | Annotate | Line # | Download | only in fsck
fsck.c revision 1.22 
      1 /*	$NetBSD: fsck.c,v 1.22 2001/02/04 19:59:37 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 #include <sys/cdefs.h>
     42 #ifndef lint
     43 __RCSID("$NetBSD: fsck.c,v 1.22 2001/02/04 19:59:37 christos 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 FSTYPENAMES
     51 #define FSCKNAMES
     52 #include <sys/disklabel.h>
     53 #include <sys/ioctl.h>
     54 
     55 #include <err.h>
     56 #include <errno.h>
     57 #include <fstab.h>
     58 #include <fcntl.h>
     59 #include <paths.h>
     60 #include <signal.h>
     61 #include <stdio.h>
     62 #include <stdlib.h>
     63 #include <string.h>
     64 #include <unistd.h>
     65 
     66 #include "pathnames.h"
     67 #include "fsutil.h"
     68 
     69 static enum { IN_LIST, NOT_IN_LIST } which = NOT_IN_LIST;
     70 
     71 TAILQ_HEAD(fstypelist, entry) opthead, selhead;
     72 
     73 struct entry {
     74 	char *type;
     75 	char *options;
     76 	TAILQ_ENTRY(entry) entries;
     77 };
     78 
     79 static int maxrun = 0;
     80 static char *options = NULL;
     81 static int flags = 0;
     82 
     83 int main __P((int, char *[]));
     84 
     85 static int checkfs __P((const char *, const char *, const char *, void *,
     86     pid_t *));
     87 static int selected __P((const char *));
     88 static void addoption __P((char *));
     89 static const char *getoptions __P((const char *));
     90 static void addentry __P((struct fstypelist *, const char *, const char *));
     91 static void maketypelist __P((char *));
     92 static void catopt __P((char **, const char *));
     93 static void mangle __P((char *, int *, const char ***, int *));
     94 static const char *getfslab __P((const char *));
     95 static void usage __P((void));
     96 static void *isok __P((struct fstab *));
     97 
     98 extern char *__progname;
     99 
    100 int
    101 main(argc, argv)
    102 	int argc;
    103 	char *argv[];
    104 {
    105 	struct fstab *fs;
    106 	int i, rval = 0;
    107 	const char *vfstype = NULL;
    108 	char globopt[3];
    109 
    110 	globopt[0] = '-';
    111 	globopt[2] = '\0';
    112 
    113 	TAILQ_INIT(&selhead);
    114 	TAILQ_INIT(&opthead);
    115 
    116 	while ((i = getopt(argc, argv, "dvpfnyl:t:T:")) != -1)
    117 		switch (i) {
    118 		case 'd':
    119 			flags |= CHECK_DEBUG;
    120 			break;
    121 
    122 		case 'v':
    123 			flags |= CHECK_VERBOSE;
    124 			break;
    125 
    126 		case 'p':
    127 			flags |= CHECK_PREEN;
    128 			/*FALLTHROUGH*/
    129 		case 'n':
    130 		case 'f':
    131 		case 'y':
    132 			globopt[1] = i;
    133 			catopt(&options, globopt);
    134 			break;
    135 
    136 		case 'l':
    137 			maxrun = atoi(optarg);
    138 			break;
    139 
    140 		case 'T':
    141 			if (*optarg)
    142 				addoption(optarg);
    143 			break;
    144 
    145 		case 't':
    146 			if (selhead.tqh_first != NULL)
    147 				errx(1, "only one -t option may be specified.");
    148 
    149 			maketypelist(optarg);
    150 			vfstype = optarg;
    151 			break;
    152 
    153 		case '?':
    154 		default:
    155 			usage();
    156 			/* NOTREACHED */
    157 		}
    158 
    159 	argc -= optind;
    160 	argv += optind;
    161 
    162 	if (argc == 0)
    163 		return checkfstab(flags, maxrun, isok, checkfs);
    164 
    165 #define	BADTYPE(type)							\
    166 	(strcmp(type, FSTAB_RO) &&					\
    167 	    strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ))
    168 
    169 
    170 	for (; argc--; argv++) {
    171 		const char *spec, *type, *cp;
    172 		char	device[MAXPATHLEN];
    173 
    174 		spec = *argv;
    175 		cp = strrchr(spec, '/');
    176 		if (cp == 0) {
    177 			(void)snprintf(device, sizeof(device), "%s%s",
    178 				_PATH_DEV, spec);
    179 			spec = device;
    180 		}
    181 		if ((fs = getfsfile(spec)) == NULL &&
    182 		    (fs = getfsspec(spec)) == NULL) {
    183 			if (vfstype == NULL)
    184 				vfstype = getfslab(spec);
    185 			type = vfstype;
    186 		}
    187 		else {
    188 			spec = fs->fs_spec;
    189 			type = fs->fs_vfstype;
    190 			if (BADTYPE(fs->fs_type))
    191 				errx(1, "%s has unknown file system type.",
    192 				    spec);
    193 		}
    194 
    195 		rval |= checkfs(type, blockcheck(spec), *argv, NULL, NULL);
    196 	}
    197 
    198 	return rval;
    199 }
    200 
    201 
    202 static void *
    203 isok(fs)
    204 	struct fstab *fs;
    205 {
    206 	if (fs->fs_passno == 0)
    207 		return NULL;
    208 
    209 	if (BADTYPE(fs->fs_type))
    210 		return NULL;
    211 
    212 	if (!selected(fs->fs_vfstype))
    213 		return NULL;
    214 
    215 	return fs;
    216 }
    217 
    218 
    219 static int
    220 checkfs(vfstype, spec, mntpt, auxarg, pidp)
    221 	const char *vfstype, *spec, *mntpt;
    222 	void *auxarg;
    223 	pid_t *pidp;
    224 {
    225 	/* List of directories containing fsck_xxx subcommands. */
    226 	static const char *edirs[] = {
    227 		_PATH_SBIN,
    228 		_PATH_USRSBIN,
    229 		NULL
    230 	};
    231 	const char **argv, **edir;
    232 	pid_t pid;
    233 	int argc, i, status, maxargc;
    234 	char *optbuf, execname[MAXPATHLEN + 1], execbase[MAXPATHLEN];
    235 	const char *extra = getoptions(vfstype);
    236 
    237 #ifdef __GNUC__
    238 	/* Avoid vfork clobbering */
    239 	(void) &optbuf;
    240 	(void) &vfstype;
    241 #endif
    242 
    243 	if (!strcmp(vfstype, "ufs"))
    244 		vfstype = MOUNT_UFS;
    245 
    246 	optbuf = NULL;
    247 	if (options)
    248 		catopt(&optbuf, options);
    249 	if (extra)
    250 		catopt(&optbuf, extra);
    251 
    252 	maxargc = 64;
    253 	argv = emalloc(sizeof(char *) * maxargc);
    254 
    255 	(void) snprintf(execbase, sizeof(execbase), "fsck_%s", vfstype);
    256 	argc = 0;
    257 	argv[argc++] = execbase;
    258 	if (optbuf)
    259 		mangle(optbuf, &argc, &argv, &maxargc);
    260 	argv[argc++] = spec;
    261 	argv[argc] = NULL;
    262 
    263 	if (flags & (CHECK_DEBUG|CHECK_VERBOSE)) {
    264 		(void)printf("start %s %swait", mntpt,
    265 			pidp ? "no" : "");
    266 		for (i = 0; i < argc; i++)
    267 			(void)printf(" %s", argv[i]);
    268 		(void)printf("\n");
    269 	}
    270 
    271 	switch (pid = vfork()) {
    272 	case -1:				/* Error. */
    273 		warn("vfork");
    274 		if (optbuf)
    275 			free(optbuf);
    276 		return (1);
    277 
    278 	case 0:					/* Child. */
    279 		if (flags & CHECK_DEBUG)
    280 			_exit(0);
    281 
    282 		/* Go find an executable. */
    283 		edir = edirs;
    284 		do {
    285 			(void)snprintf(execname,
    286 			    sizeof(execname), "%s/%s", *edir, execbase);
    287 			execv(execname, (char * const *)argv);
    288 			if (errno != ENOENT) {
    289 				if (spec)
    290 					warn("exec %s for %s", execname, spec);
    291 				else
    292 					warn("exec %s", execname);
    293 			}
    294 		} while (*++edir != NULL);
    295 
    296 		if (errno == ENOENT) {
    297 			if (spec)
    298 				warn("exec %s for %s", execname, spec);
    299 			else
    300 				warn("exec %s", execname);
    301 		}
    302 		_exit(1);
    303 		/* NOTREACHED */
    304 
    305 	default:				/* Parent. */
    306 		if (optbuf)
    307 			free(optbuf);
    308 
    309 		if (pidp) {
    310 			*pidp = pid;
    311 			return 0;
    312 		}
    313 
    314 		if (waitpid(pid, &status, 0) < 0) {
    315 			warn("waitpid");
    316 			return (1);
    317 		}
    318 
    319 		if (WIFEXITED(status)) {
    320 			if (WEXITSTATUS(status) != 0)
    321 				return (WEXITSTATUS(status));
    322 		}
    323 		else if (WIFSIGNALED(status)) {
    324 			warnx("%s: %s", spec, strsignal(WTERMSIG(status)));
    325 			return (1);
    326 		}
    327 		break;
    328 	}
    329 
    330 	return (0);
    331 }
    332 
    333 
    334 static int
    335 selected(type)
    336 	const char *type;
    337 {
    338 	struct entry *e;
    339 
    340 	/* If no type specified, it's always selected. */
    341 	for (e = selhead.tqh_first; e != NULL; e = e->entries.tqe_next)
    342 		if (!strncmp(e->type, type, MFSNAMELEN))
    343 			return which == IN_LIST ? 1 : 0;
    344 
    345 	return which == IN_LIST ? 0 : 1;
    346 }
    347 
    348 
    349 static const char *
    350 getoptions(type)
    351 	const char *type;
    352 {
    353 	struct entry *e;
    354 
    355 	for (e = opthead.tqh_first; e != NULL; e = e->entries.tqe_next)
    356 		if (!strncmp(e->type, type, MFSNAMELEN))
    357 			return e->options;
    358 	return "";
    359 }
    360 
    361 
    362 static void
    363 addoption(optstr)
    364 	char *optstr;
    365 {
    366 	char *newoptions;
    367 	struct entry *e;
    368 
    369 	if ((newoptions = strchr(optstr, ':')) == NULL)
    370 		errx(1, "Invalid option string");
    371 
    372 	*newoptions++ = '\0';
    373 
    374 	for (e = opthead.tqh_first; e != NULL; e = e->entries.tqe_next)
    375 		if (!strncmp(e->type, optstr, MFSNAMELEN)) {
    376 			catopt(&e->options, newoptions);
    377 			return;
    378 		}
    379 	addentry(&opthead, optstr, newoptions);
    380 }
    381 
    382 
    383 static void
    384 addentry(list, type, opts)
    385 	struct fstypelist *list;
    386 	const char *type;
    387 	const char *opts;
    388 {
    389 	struct entry *e;
    390 
    391 	e = emalloc(sizeof(struct entry));
    392 	e->type = estrdup(type);
    393 	e->options = estrdup(opts);
    394 	TAILQ_INSERT_TAIL(list, e, entries);
    395 }
    396 
    397 
    398 static void
    399 maketypelist(fslist)
    400 	char *fslist;
    401 {
    402 	char *ptr;
    403 
    404 	if ((fslist == NULL) || (fslist[0] == '\0'))
    405 		errx(1, "empty type list");
    406 
    407 	if (fslist[0] == 'n' && fslist[1] == 'o') {
    408 		fslist += 2;
    409 		which = NOT_IN_LIST;
    410 	}
    411 	else
    412 		which = IN_LIST;
    413 
    414 	while ((ptr = strsep(&fslist, ",")) != NULL)
    415 		addentry(&selhead, ptr, "");
    416 
    417 }
    418 
    419 
    420 static void
    421 catopt(sp, o)
    422 	char **sp;
    423 	const char *o;
    424 {
    425 	char *s;
    426 	size_t i, j;
    427 
    428 	s = *sp;
    429 	if (s) {
    430 		i = strlen(s);
    431 		j = i + 1 + strlen(o) + 1;
    432 		s = erealloc(s, j);
    433 		(void)snprintf(s + i, j, ",%s", o);
    434 	} else
    435 		s = estrdup(o);
    436 	*sp = s;
    437 }
    438 
    439 
    440 static void
    441 mangle(options, argcp, argvp, maxargcp)
    442 	char *options;
    443 	int *argcp, *maxargcp;
    444 	const char ***argvp;
    445 {
    446 	char *p, *s;
    447 	int argc, maxargc;
    448 	const char **argv;
    449 
    450 	argc = *argcp;
    451 	argv = *argvp;
    452 	maxargc = *maxargcp;
    453 
    454 	for (s = options; (p = strsep(&s, ",")) != NULL;) {
    455 		/* Always leave space for one more argument and the NULL. */
    456 		if (argc >= maxargc - 3) {
    457 			maxargc <<= 1;
    458 			argv = erealloc(argv, maxargc * sizeof(char *));
    459 		}
    460 		if (*p != '\0')  {
    461 			if (*p == '-') {
    462 				argv[argc++] = p;
    463 				p = strchr(p, '=');
    464 				if (p) {
    465 					*p = '\0';
    466 					argv[argc++] = p+1;
    467 				}
    468 			} else {
    469 				argv[argc++] = "-o";
    470 				argv[argc++] = p;
    471 			}
    472 		}
    473 	}
    474 
    475 	*argcp = argc;
    476 	*argvp = argv;
    477 	*maxargcp = maxargc;
    478 }
    479 
    480 
    481 const static char *
    482 getfslab(str)
    483 	const char *str;
    484 {
    485 	struct disklabel dl;
    486 	int fd;
    487 	char p;
    488 	const char *vfstype;
    489 	u_char t;
    490 
    491 	/* deduce the filesystem type from the disk label */
    492 	if ((fd = open(str, O_RDONLY)) == -1)
    493 		err(1, "cannot open `%s'", str);
    494 
    495 	if (ioctl(fd, DIOCGDINFO, &dl) == -1)
    496 		err(1, "cannot get disklabel for `%s'", str);
    497 
    498 	(void) close(fd);
    499 
    500 	p = str[strlen(str) - 1];
    501 
    502 	if ((p - 'a') >= dl.d_npartitions)
    503 		errx(1, "partition `%s' is not defined on disk", str);
    504 
    505 	if ((t = dl.d_partitions[p - 'a'].p_fstype) >= FSMAXTYPES)
    506 		errx(1, "partition `%s' is not of a legal vfstype",
    507 		    str);
    508 
    509 	if ((vfstype = fscknames[t]) == NULL)
    510 		errx(1, "vfstype `%s' on partition `%s' is not supported",
    511 		    fstypenames[t], str);
    512 
    513 	return vfstype;
    514 }
    515 
    516 
    517 static void
    518 usage()
    519 {
    520 	static const char common[] =
    521 	    "[-dpvlyn] [-T fstype:fsoptions] [-t fstype]";
    522 
    523 	(void)fprintf(stderr, "Usage: %s %s [special|node]...\n",
    524 	    __progname, common);
    525 	exit(1);
    526 }
    527