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fsck.c revision 1.15 
      1 /*	$NetBSD: fsck.c,v 1.15 1997/10/31 09:11:53 mycroft 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 1.15 1997/10/31 09:11:53 mycroft 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 	const char **argv, **edir;
    221 	pid_t pid;
    222 	int argc, i, status, maxargc;
    223 	char *optbuf, execname[MAXPATHLEN + 1], execbase[MAXPATHLEN];
    224 	const char *extra = getoptions(vfstype);
    225 
    226 #ifdef __GNUC__
    227 	/* Avoid vfork clobbering */
    228 	(void) &optbuf;
    229 	(void) &vfstype;
    230 #endif
    231 
    232 	if (!strcmp(vfstype, "ufs"))
    233 		vfstype = MOUNT_UFS;
    234 
    235 	if (options) {
    236 		if (extra)
    237 			optbuf = catopt(options, extra, 0);
    238 		else
    239 			optbuf = estrdup(options);
    240 	} else {
    241 		if (extra)
    242 			optbuf = estrdup(extra);
    243 		else
    244 			optbuf = NULL;
    245 	}
    246 
    247 	maxargc = 64;
    248 	argv = emalloc(sizeof(char *) * maxargc);
    249 
    250 	(void) snprintf(execbase, sizeof(execbase), "fsck_%s", vfstype);
    251 	argc = 0;
    252 	argv[argc++] = execbase;
    253 	if (optbuf)
    254 		mangle(optbuf, &argc, &argv, &maxargc);
    255 	argv[argc++] = spec;
    256 	argv[argc] = NULL;
    257 
    258 	if (flags & (CHECK_DEBUG|CHECK_VERBOSE)) {
    259 		(void)printf("start %s %swait", mntpt,
    260 			pidp ? "no" : "");
    261 		for (i = 0; i < argc; i++)
    262 			(void)printf(" %s", argv[i]);
    263 		(void)printf("\n");
    264 	}
    265 
    266 	switch (pid = vfork()) {
    267 	case -1:				/* Error. */
    268 		warn("vfork");
    269 		if (optbuf)
    270 			free(optbuf);
    271 		return (1);
    272 
    273 	case 0:					/* Child. */
    274 		if (flags & CHECK_DEBUG)
    275 			_exit(0);
    276 
    277 		/* Go find an executable. */
    278 		edir = edirs;
    279 		do {
    280 			(void)snprintf(execname,
    281 			    sizeof(execname), "%s/%s", *edir, execbase);
    282 			execv(execname, (char * const *)argv);
    283 			if (errno != ENOENT)
    284 				if (spec)
    285 					warn("exec %s for %s", execname, spec);
    286 				else
    287 					warn("exec %s", execname);
    288 		} while (*++edir != NULL);
    289 
    290 		if (errno == ENOENT)
    291 			if (spec)
    292 				warn("exec %s for %s", execname, spec);
    293 			else
    294 				warn("exec %s", execname);
    295 		_exit(1);
    296 		/* NOTREACHED */
    297 
    298 	default:				/* Parent. */
    299 		if (optbuf)
    300 			free(optbuf);
    301 
    302 		if (pidp) {
    303 			*pidp = pid;
    304 			return 0;
    305 		}
    306 
    307 		if (waitpid(pid, &status, 0) < 0) {
    308 			warn("waitpid");
    309 			return (1);
    310 		}
    311 
    312 		if (WIFEXITED(status)) {
    313 			if (WEXITSTATUS(status) != 0)
    314 				return (WEXITSTATUS(status));
    315 		}
    316 		else if (WIFSIGNALED(status)) {
    317 			warnx("%s: %s", spec, strsignal(WTERMSIG(status)));
    318 			return (1);
    319 		}
    320 		break;
    321 	}
    322 
    323 	return (0);
    324 }
    325 
    326 
    327 static int
    328 selected(type)
    329 	const char *type;
    330 {
    331 	struct entry *e;
    332 
    333 	/* If no type specified, it's always selected. */
    334 	for (e = selhead.tqh_first; e != NULL; e = e->entries.tqe_next)
    335 		if (!strncmp(e->type, type, MFSNAMELEN))
    336 			return which == IN_LIST ? 1 : 0;
    337 
    338 	return which == IN_LIST ? 0 : 1;
    339 }
    340 
    341 
    342 static const char *
    343 getoptions(type)
    344 	const char *type;
    345 {
    346 	struct entry *e;
    347 
    348 	for (e = opthead.tqh_first; e != NULL; e = e->entries.tqe_next)
    349 		if (!strncmp(e->type, type, MFSNAMELEN))
    350 			return e->options;
    351 	return "";
    352 }
    353 
    354 
    355 static void
    356 addoption(optstr)
    357 	char *optstr;
    358 {
    359 	char *newoptions;
    360 	struct entry *e;
    361 
    362 	if ((newoptions = strchr(optstr, ':')) == NULL)
    363 		errx(1, "Invalid option string");
    364 
    365 	*newoptions++ = '\0';
    366 
    367 	for (e = opthead.tqh_first; e != NULL; e = e->entries.tqe_next)
    368 		if (!strncmp(e->type, optstr, MFSNAMELEN)) {
    369 			e->options = catopt(e->options, newoptions, 1);
    370 			return;
    371 		}
    372 	addentry(&opthead, optstr, newoptions);
    373 }
    374 
    375 
    376 static void
    377 addentry(list, type, opts)
    378 	struct fstypelist *list;
    379 	const char *type;
    380 	const char *opts;
    381 {
    382 	struct entry *e;
    383 
    384 	e = emalloc(sizeof(struct entry));
    385 	e->type = estrdup(type);
    386 	e->options = estrdup(opts);
    387 	TAILQ_INSERT_TAIL(list, e, entries);
    388 }
    389 
    390 
    391 static void
    392 maketypelist(fslist)
    393 	char *fslist;
    394 {
    395 	char *ptr;
    396 
    397 	if ((fslist == NULL) || (fslist[0] == '\0'))
    398 		errx(1, "empty type list");
    399 
    400 	if (fslist[0] == 'n' && fslist[1] == 'o') {
    401 		fslist += 2;
    402 		which = NOT_IN_LIST;
    403 	}
    404 	else
    405 		which = IN_LIST;
    406 
    407 	while ((ptr = strsep(&fslist, ",")) != NULL)
    408 		addentry(&selhead, ptr, "");
    409 
    410 }
    411 
    412 
    413 static char *
    414 catopt(s0, s1, fr)
    415 	char *s0;
    416 	const char *s1;
    417 	int fr;
    418 {
    419 	size_t i;
    420 	char *cp;
    421 
    422 	if (s0 && *s0) {
    423 		i = strlen(s0) + strlen(s1) + 1 + 1;
    424 		cp = emalloc(i);
    425 		(void)snprintf(cp, i, "%s,%s", s0, s1);
    426 	} else
    427 		cp = estrdup(s1);
    428 
    429 	if (s0 && fr)
    430 		free(s0);
    431 	return (cp);
    432 }
    433 
    434 
    435 static void
    436 mangle(options, argcp, argvp, maxargcp)
    437 	char *options;
    438 	int *argcp, *maxargcp;
    439 	const char ***argvp;
    440 {
    441 	char *p, *s;
    442 	int argc, maxargc;
    443 	const char **argv;
    444 
    445 	argc = *argcp;
    446 	argv = *argvp;
    447 	maxargc = *maxargcp;
    448 
    449 	for (s = options; (p = strsep(&s, ",")) != NULL;) {
    450 		/* Always leave space for one more argument and the NULL. */
    451 		if (argc >= maxargc - 3) {
    452 			maxargc <<= 1;
    453 			argv = erealloc(argv, maxargc * sizeof(char *));
    454 		}
    455 		if (*p != '\0')
    456 			if (*p == '-') {
    457 				argv[argc++] = p;
    458 				p = strchr(p, '=');
    459 				if (p) {
    460 					*p = '\0';
    461 					argv[argc++] = p+1;
    462 				}
    463 			} else {
    464 				argv[argc++] = "-o";
    465 				argv[argc++] = p;
    466 			}
    467 	}
    468 
    469 	*argcp = argc;
    470 	*argvp = argv;
    471 	*maxargcp = maxargc;
    472 }
    473 
    474 
    475 static char *
    476 getfslab(str)
    477 	const char *str;
    478 {
    479 	struct disklabel dl;
    480 	int fd;
    481 	char p, *vfstype;
    482 	u_char t;
    483 
    484 	/* deduce the filesystem type from the disk label */
    485 	if ((fd = open(str, O_RDONLY)) == -1)
    486 		err(1, "cannot open `%s'", str);
    487 
    488 	if (ioctl(fd, DIOCGDINFO, &dl) == -1)
    489 		err(1, "cannot get disklabel for `%s'", str);
    490 
    491 	(void) close(fd);
    492 
    493 	p = str[strlen(str) - 1];
    494 
    495 	if ((p - 'a') >= dl.d_npartitions)
    496 		errx(1, "partition `%s' is not defined on disk", str);
    497 
    498 	if ((t = dl.d_partitions[p - 'a'].p_fstype) >= FSMAXTYPES)
    499 		errx(1, "partition `%s' is not of a legal vfstype",
    500 		    str);
    501 
    502 	if ((vfstype = fscknames[t]) == NULL)
    503 		errx(1, "vfstype `%s' on partition `%s' is not supported",
    504 		    fstypenames[t], str);
    505 
    506 	return vfstype;
    507 }
    508 
    509 
    510 static void
    511 usage()
    512 {
    513 	extern char *__progname;
    514 	static const char common[] =
    515 	    "[-dpvlyn] [-T fstype:fsoptions] [-t fstype]";
    516 
    517 	(void)fprintf(stderr, "Usage: %s %s [special|node]...\n",
    518 	    __progname, common);
    519 	exit(1);
    520 }
    521