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fsck.c revision 1.23 
      1 /*	$NetBSD: fsck.c,v 1.23 2001/02/19 22:56:19 cgd 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 1.23 2001/02/19 22:56:19 cgd 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 int
     99 main(argc, argv)
    100 	int argc;
    101 	char *argv[];
    102 {
    103 	struct fstab *fs;
    104 	int i, rval = 0;
    105 	const char *vfstype = NULL;
    106 	char globopt[3];
    107 
    108 	globopt[0] = '-';
    109 	globopt[2] = '\0';
    110 
    111 	TAILQ_INIT(&selhead);
    112 	TAILQ_INIT(&opthead);
    113 
    114 	while ((i = getopt(argc, argv, "dvpfnyl:t:T:")) != -1)
    115 		switch (i) {
    116 		case 'd':
    117 			flags |= CHECK_DEBUG;
    118 			break;
    119 
    120 		case 'v':
    121 			flags |= CHECK_VERBOSE;
    122 			break;
    123 
    124 		case 'p':
    125 			flags |= CHECK_PREEN;
    126 			/*FALLTHROUGH*/
    127 		case 'n':
    128 		case 'f':
    129 		case 'y':
    130 			globopt[1] = i;
    131 			catopt(&options, globopt);
    132 			break;
    133 
    134 		case 'l':
    135 			maxrun = atoi(optarg);
    136 			break;
    137 
    138 		case 'T':
    139 			if (*optarg)
    140 				addoption(optarg);
    141 			break;
    142 
    143 		case 't':
    144 			if (selhead.tqh_first != NULL)
    145 				errx(1, "only one -t option may be specified.");
    146 
    147 			maketypelist(optarg);
    148 			vfstype = optarg;
    149 			break;
    150 
    151 		case '?':
    152 		default:
    153 			usage();
    154 			/* NOTREACHED */
    155 		}
    156 
    157 	argc -= optind;
    158 	argv += optind;
    159 
    160 	if (argc == 0)
    161 		return checkfstab(flags, maxrun, isok, checkfs);
    162 
    163 #define	BADTYPE(type)							\
    164 	(strcmp(type, FSTAB_RO) &&					\
    165 	    strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ))
    166 
    167 
    168 	for (; argc--; argv++) {
    169 		const char *spec, *type, *cp;
    170 		char	device[MAXPATHLEN];
    171 
    172 		spec = *argv;
    173 		cp = strrchr(spec, '/');
    174 		if (cp == 0) {
    175 			(void)snprintf(device, sizeof(device), "%s%s",
    176 				_PATH_DEV, spec);
    177 			spec = device;
    178 		}
    179 		if ((fs = getfsfile(spec)) == NULL &&
    180 		    (fs = getfsspec(spec)) == NULL) {
    181 			if (vfstype == NULL)
    182 				vfstype = getfslab(spec);
    183 			type = vfstype;
    184 		}
    185 		else {
    186 			spec = fs->fs_spec;
    187 			type = fs->fs_vfstype;
    188 			if (BADTYPE(fs->fs_type))
    189 				errx(1, "%s has unknown file system type.",
    190 				    spec);
    191 		}
    192 
    193 		rval |= checkfs(type, blockcheck(spec), *argv, NULL, NULL);
    194 	}
    195 
    196 	return rval;
    197 }
    198 
    199 
    200 static void *
    201 isok(fs)
    202 	struct fstab *fs;
    203 {
    204 	if (fs->fs_passno == 0)
    205 		return NULL;
    206 
    207 	if (BADTYPE(fs->fs_type))
    208 		return NULL;
    209 
    210 	if (!selected(fs->fs_vfstype))
    211 		return NULL;
    212 
    213 	return fs;
    214 }
    215 
    216 
    217 static int
    218 checkfs(vfstype, spec, mntpt, auxarg, pidp)
    219 	const char *vfstype, *spec, *mntpt;
    220 	void *auxarg;
    221 	pid_t *pidp;
    222 {
    223 	/* List of directories containing fsck_xxx subcommands. */
    224 	static const char *edirs[] = {
    225 		_PATH_SBIN,
    226 		_PATH_USRSBIN,
    227 		NULL
    228 	};
    229 	const char **argv, **edir;
    230 	pid_t pid;
    231 	int argc, i, status, maxargc;
    232 	char *optbuf, execname[MAXPATHLEN + 1], execbase[MAXPATHLEN];
    233 	const char *extra = getoptions(vfstype);
    234 
    235 #ifdef __GNUC__
    236 	/* Avoid vfork clobbering */
    237 	(void) &optbuf;
    238 	(void) &vfstype;
    239 #endif
    240 
    241 	if (!strcmp(vfstype, "ufs"))
    242 		vfstype = MOUNT_UFS;
    243 
    244 	optbuf = NULL;
    245 	if (options)
    246 		catopt(&optbuf, options);
    247 	if (extra)
    248 		catopt(&optbuf, extra);
    249 
    250 	maxargc = 64;
    251 	argv = emalloc(sizeof(char *) * maxargc);
    252 
    253 	(void) snprintf(execbase, sizeof(execbase), "fsck_%s", vfstype);
    254 	argc = 0;
    255 	argv[argc++] = execbase;
    256 	if (optbuf)
    257 		mangle(optbuf, &argc, &argv, &maxargc);
    258 	argv[argc++] = spec;
    259 	argv[argc] = NULL;
    260 
    261 	if (flags & (CHECK_DEBUG|CHECK_VERBOSE)) {
    262 		(void)printf("start %s %swait", mntpt,
    263 			pidp ? "no" : "");
    264 		for (i = 0; i < argc; i++)
    265 			(void)printf(" %s", argv[i]);
    266 		(void)printf("\n");
    267 	}
    268 
    269 	switch (pid = vfork()) {
    270 	case -1:				/* Error. */
    271 		warn("vfork");
    272 		if (optbuf)
    273 			free(optbuf);
    274 		return (1);
    275 
    276 	case 0:					/* Child. */
    277 		if (flags & CHECK_DEBUG)
    278 			_exit(0);
    279 
    280 		/* Go find an executable. */
    281 		edir = edirs;
    282 		do {
    283 			(void)snprintf(execname,
    284 			    sizeof(execname), "%s/%s", *edir, execbase);
    285 			execv(execname, (char * const *)argv);
    286 			if (errno != ENOENT) {
    287 				if (spec)
    288 					warn("exec %s for %s", execname, spec);
    289 				else
    290 					warn("exec %s", execname);
    291 			}
    292 		} while (*++edir != NULL);
    293 
    294 		if (errno == ENOENT) {
    295 			if (spec)
    296 				warn("exec %s for %s", execname, spec);
    297 			else
    298 				warn("exec %s", execname);
    299 		}
    300 		_exit(1);
    301 		/* NOTREACHED */
    302 
    303 	default:				/* Parent. */
    304 		if (optbuf)
    305 			free(optbuf);
    306 
    307 		if (pidp) {
    308 			*pidp = pid;
    309 			return 0;
    310 		}
    311 
    312 		if (waitpid(pid, &status, 0) < 0) {
    313 			warn("waitpid");
    314 			return (1);
    315 		}
    316 
    317 		if (WIFEXITED(status)) {
    318 			if (WEXITSTATUS(status) != 0)
    319 				return (WEXITSTATUS(status));
    320 		}
    321 		else if (WIFSIGNALED(status)) {
    322 			warnx("%s: %s", spec, strsignal(WTERMSIG(status)));
    323 			return (1);
    324 		}
    325 		break;
    326 	}
    327 
    328 	return (0);
    329 }
    330 
    331 
    332 static int
    333 selected(type)
    334 	const char *type;
    335 {
    336 	struct entry *e;
    337 
    338 	/* If no type specified, it's always selected. */
    339 	for (e = selhead.tqh_first; e != NULL; e = e->entries.tqe_next)
    340 		if (!strncmp(e->type, type, MFSNAMELEN))
    341 			return which == IN_LIST ? 1 : 0;
    342 
    343 	return which == IN_LIST ? 0 : 1;
    344 }
    345 
    346 
    347 static const char *
    348 getoptions(type)
    349 	const char *type;
    350 {
    351 	struct entry *e;
    352 
    353 	for (e = opthead.tqh_first; e != NULL; e = e->entries.tqe_next)
    354 		if (!strncmp(e->type, type, MFSNAMELEN))
    355 			return e->options;
    356 	return "";
    357 }
    358 
    359 
    360 static void
    361 addoption(optstr)
    362 	char *optstr;
    363 {
    364 	char *newoptions;
    365 	struct entry *e;
    366 
    367 	if ((newoptions = strchr(optstr, ':')) == NULL)
    368 		errx(1, "Invalid option string");
    369 
    370 	*newoptions++ = '\0';
    371 
    372 	for (e = opthead.tqh_first; e != NULL; e = e->entries.tqe_next)
    373 		if (!strncmp(e->type, optstr, MFSNAMELEN)) {
    374 			catopt(&e->options, newoptions);
    375 			return;
    376 		}
    377 	addentry(&opthead, optstr, newoptions);
    378 }
    379 
    380 
    381 static void
    382 addentry(list, type, opts)
    383 	struct fstypelist *list;
    384 	const char *type;
    385 	const char *opts;
    386 {
    387 	struct entry *e;
    388 
    389 	e = emalloc(sizeof(struct entry));
    390 	e->type = estrdup(type);
    391 	e->options = estrdup(opts);
    392 	TAILQ_INSERT_TAIL(list, e, entries);
    393 }
    394 
    395 
    396 static void
    397 maketypelist(fslist)
    398 	char *fslist;
    399 {
    400 	char *ptr;
    401 
    402 	if ((fslist == NULL) || (fslist[0] == '\0'))
    403 		errx(1, "empty type list");
    404 
    405 	if (fslist[0] == 'n' && fslist[1] == 'o') {
    406 		fslist += 2;
    407 		which = NOT_IN_LIST;
    408 	}
    409 	else
    410 		which = IN_LIST;
    411 
    412 	while ((ptr = strsep(&fslist, ",")) != NULL)
    413 		addentry(&selhead, ptr, "");
    414 
    415 }
    416 
    417 
    418 static void
    419 catopt(sp, o)
    420 	char **sp;
    421 	const char *o;
    422 {
    423 	char *s;
    424 	size_t i, j;
    425 
    426 	s = *sp;
    427 	if (s) {
    428 		i = strlen(s);
    429 		j = i + 1 + strlen(o) + 1;
    430 		s = erealloc(s, j);
    431 		(void)snprintf(s + i, j, ",%s", o);
    432 	} else
    433 		s = estrdup(o);
    434 	*sp = s;
    435 }
    436 
    437 
    438 static void
    439 mangle(options, argcp, argvp, maxargcp)
    440 	char *options;
    441 	int *argcp, *maxargcp;
    442 	const char ***argvp;
    443 {
    444 	char *p, *s;
    445 	int argc, maxargc;
    446 	const char **argv;
    447 
    448 	argc = *argcp;
    449 	argv = *argvp;
    450 	maxargc = *maxargcp;
    451 
    452 	for (s = options; (p = strsep(&s, ",")) != NULL;) {
    453 		/* Always leave space for one more argument and the NULL. */
    454 		if (argc >= maxargc - 3) {
    455 			maxargc <<= 1;
    456 			argv = erealloc(argv, maxargc * sizeof(char *));
    457 		}
    458 		if (*p != '\0')  {
    459 			if (*p == '-') {
    460 				argv[argc++] = p;
    461 				p = strchr(p, '=');
    462 				if (p) {
    463 					*p = '\0';
    464 					argv[argc++] = p+1;
    465 				}
    466 			} else {
    467 				argv[argc++] = "-o";
    468 				argv[argc++] = p;
    469 			}
    470 		}
    471 	}
    472 
    473 	*argcp = argc;
    474 	*argvp = argv;
    475 	*maxargcp = maxargc;
    476 }
    477 
    478 
    479 const static char *
    480 getfslab(str)
    481 	const char *str;
    482 {
    483 	struct disklabel dl;
    484 	int fd;
    485 	char p;
    486 	const char *vfstype;
    487 	u_char t;
    488 
    489 	/* deduce the filesystem type from the disk label */
    490 	if ((fd = open(str, O_RDONLY)) == -1)
    491 		err(1, "cannot open `%s'", str);
    492 
    493 	if (ioctl(fd, DIOCGDINFO, &dl) == -1)
    494 		err(1, "cannot get disklabel for `%s'", str);
    495 
    496 	(void) close(fd);
    497 
    498 	p = str[strlen(str) - 1];
    499 
    500 	if ((p - 'a') >= dl.d_npartitions)
    501 		errx(1, "partition `%s' is not defined on disk", str);
    502 
    503 	if ((t = dl.d_partitions[p - 'a'].p_fstype) >= FSMAXTYPES)
    504 		errx(1, "partition `%s' is not of a legal vfstype",
    505 		    str);
    506 
    507 	if ((vfstype = fscknames[t]) == NULL)
    508 		errx(1, "vfstype `%s' on partition `%s' is not supported",
    509 		    fstypenames[t], str);
    510 
    511 	return vfstype;
    512 }
    513 
    514 
    515 static void
    516 usage()
    517 {
    518 	static const char common[] =
    519 	    "[-dpvlyn] [-T fstype:fsoptions] [-t fstype]";
    520 
    521 	(void)fprintf(stderr, "Usage: %s %s [special|node]...\n",
    522 	    getprogname(), common);
    523 	exit(1);
    524 }
    525