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fsck.c revision 1.11 
      1 /*	$NetBSD: fsck.c,v 1.11 1997/06/23 01:03:35 mikel 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 1.11 1997/06/23 01:03:35 mikel Exp $";
     42 
     43 #include <sys/param.h>
     44 #include <sys/mount.h>
     45 #include <sys/queue.h>
     46 #include <sys/wait.h>
     47 #define DKTYPENAMES
     48 #include <sys/disklabel.h>
     49 #include <sys/ioctl.h>
     50 
     51 #include <err.h>
     52 #include <errno.h>
     53 #include <fstab.h>
     54 #include <fcntl.h>
     55 #include <signal.h>
     56 #include <stdio.h>
     57 #include <stdlib.h>
     58 #include <string.h>
     59 #include <unistd.h>
     60 
     61 #include "pathnames.h"
     62 #include "fsutil.h"
     63 
     64 static enum { IN_LIST, NOT_IN_LIST } which = NOT_IN_LIST;
     65 
     66 TAILQ_HEAD(fstypelist, entry) opthead, selhead;
     67 
     68 struct entry {
     69 	char *type;
     70 	char *options;
     71 	TAILQ_ENTRY(entry) entries;
     72 };
     73 
     74 static int maxrun = 0;
     75 static char *options = NULL;
     76 static int flags = 0;
     77 
     78 int main __P((int, char *[]));
     79 
     80 static int checkfs __P((const char *, const char *, const char *, void *,
     81     pid_t *));
     82 static int selected __P((const char *));
     83 static void addoption __P((char *));
     84 static const char *getoptions __P((const char *));
     85 static void addentry __P((struct fstypelist *, const char *, const char *));
     86 static void maketypelist __P((char *));
     87 static char *catopt __P((char *, const char *, int));
     88 static void mangle __P((char *, int *, const char ***, int *));
     89 static char *getfslab __P((const char *));
     90 static void usage __P((void));
     91 static void *isok __P((struct fstab *));
     92 
     93 int
     94 main(argc, argv)
     95 	int argc;
     96 	char *argv[];
     97 {
     98 	struct fstab *fs;
     99 	int i, rval = 0;
    100 	char *vfstype = NULL;
    101 	char globopt[3];
    102 
    103 	globopt[0] = '-';
    104 	globopt[2] = '\0';
    105 
    106 	TAILQ_INIT(&selhead);
    107 	TAILQ_INIT(&opthead);
    108 
    109 	while ((i = getopt(argc, argv, "dvpfnyl:t:T:")) != -1)
    110 		switch (i) {
    111 		case 'd':
    112 			flags |= CHECK_DEBUG;
    113 			break;
    114 
    115 		case 'v':
    116 			flags |= CHECK_VERBOSE;
    117 			break;
    118 
    119 		case 'p':
    120 			flags |= CHECK_PREEN;
    121 			/*FALLTHROUGH*/
    122 		case 'n':
    123 		case 'f':
    124 		case 'y':
    125 			globopt[1] = i;
    126 			options = catopt(options, globopt, 1);
    127 			break;
    128 
    129 		case 'l':
    130 			maxrun = atoi(optarg);
    131 			break;
    132 
    133 		case 'T':
    134 			if (*optarg)
    135 				addoption(optarg);
    136 			break;
    137 
    138 		case 't':
    139 			if (selhead.tqh_first != NULL)
    140 				errx(1, "only one -t option may be specified.");
    141 
    142 			maketypelist(optarg);
    143 			vfstype = optarg;
    144 			break;
    145 
    146 		case '?':
    147 		default:
    148 			usage();
    149 			/* NOTREACHED */
    150 		}
    151 
    152 	argc -= optind;
    153 	argv += optind;
    154 
    155 	if (argc == 0)
    156 		return checkfstab(flags, maxrun, isok, checkfs);
    157 
    158 #define	BADTYPE(type)							\
    159 	(strcmp(type, FSTAB_RO) &&					\
    160 	    strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ))
    161 
    162 
    163 	for (; argc--; argv++) {
    164 		char *spec, *type;
    165 
    166 		if ((fs = getfsfile(*argv)) == NULL &&
    167 		    (fs = getfsspec(*argv)) == NULL) {
    168 			if (vfstype == NULL)
    169 				vfstype = getfslab(*argv);
    170 			spec = *argv;
    171 			type = vfstype;
    172 		}
    173 		else {
    174 			spec = fs->fs_spec;
    175 			type = fs->fs_vfstype;
    176 			if (BADTYPE(fs->fs_type))
    177 				errx(1, "%s has unknown file system type.",
    178 				    *argv);
    179 		}
    180 
    181 		rval |= checkfs(type, blockcheck(spec), *argv, NULL, NULL);
    182 	}
    183 
    184 	return rval;
    185 }
    186 
    187 
    188 static void *
    189 isok(fs)
    190 	struct fstab *fs;
    191 {
    192 	if (fs->fs_passno == 0)
    193 		return NULL;
    194 
    195 	if (BADTYPE(fs->fs_type))
    196 		return NULL;
    197 
    198 	if (!selected(fs->fs_vfstype))
    199 		return NULL;
    200 
    201 	return fs;
    202 }
    203 
    204 
    205 static int
    206 checkfs(vfstype, spec, mntpt, auxarg, pidp)
    207 	const char *vfstype, *spec, *mntpt;
    208 	void *auxarg;
    209 	pid_t *pidp;
    210 {
    211 	/* List of directories containing fsck_xxx subcommands. */
    212 	static const char *edirs[] = {
    213 		_PATH_SBIN,
    214 		_PATH_USRSBIN,
    215 		NULL
    216 	};
    217 	char execbase[MAXPATHLEN];
    218 	const char **argv, **edir;
    219 	pid_t pid;
    220 	int argc = 1, i, status, maxargc;
    221 	char *optbuf = NULL, execname[MAXPATHLEN + 1];
    222 	const char *extra = getoptions(vfstype);
    223 
    224 
    225 #ifdef __GNUC__
    226 	/* Avoid vfork clobbering */
    227 	(void) &optbuf;
    228 	(void) &vfstype;
    229 #endif
    230 
    231 	if (strcmp(vfstype, "ufs") == 0)
    232 		vfstype = MOUNT_UFS;
    233 
    234 	maxargc = 100;
    235 	argv = emalloc(sizeof(char *) * maxargc);
    236 
    237 	/* construct basename of executable and argv[0] simultaneously */
    238 	(void) snprintf(execbase, sizeof(execbase), "fsck_%s", vfstype);
    239 	argv[0] = vfstype;
    240 
    241 	if (options) {
    242 		if (extra != NULL)
    243 			optbuf = catopt(options, extra, 0);
    244 		else
    245 			optbuf = estrdup(options);
    246 	}
    247 	else if (extra)
    248 		optbuf = estrdup(extra);
    249 
    250 	if (optbuf)
    251 		mangle(optbuf, &argc, &argv, &maxargc);
    252 
    253 	argv[argc++] = spec;
    254 	argv[argc] = NULL;
    255 
    256 	if (flags & (CHECK_DEBUG|CHECK_VERBOSE)) {
    257 		(void)printf("start %s %swait", mntpt,
    258 			pidp ? "no" : "");
    259 		for (i = 0; i < argc; i++)
    260 			(void)printf(" %s", argv[i]);
    261 		(void)printf("\n");
    262 	}
    263 
    264 	switch (pid = vfork()) {
    265 	case -1:				/* Error. */
    266 		warn("vfork");
    267 		if (optbuf)
    268 			free(optbuf);
    269 		return (1);
    270 
    271 	case 0:					/* Child. */
    272 		if (flags & CHECK_DEBUG)
    273 			_exit(0);
    274 
    275 		/* Go find an executable. */
    276 		edir = edirs;
    277 		do {
    278 			(void)snprintf(execname,
    279 			    sizeof(execname), "%s/%s", *edir, execbase);
    280 			execv(execname, (char * const *)argv);
    281 			if (errno != ENOENT)
    282 				if (spec)
    283 					warn("exec %s for %s", execname, spec);
    284 				else
    285 					warn("exec %s", execname);
    286 		} while (*++edir != NULL);
    287 
    288 		if (errno == ENOENT)
    289 			if (spec)
    290 				warn("exec %s for %s", execname, spec);
    291 			else
    292 				warn("exec %s", execname);
    293 		_exit(1);
    294 		/* NOTREACHED */
    295 
    296 	default:				/* Parent. */
    297 		if (optbuf)
    298 			free(optbuf);
    299 
    300 		if (pidp) {
    301 			*pidp = pid;
    302 			return 0;
    303 		}
    304 
    305 		if (waitpid(pid, &status, 0) < 0) {
    306 			warn("waitpid");
    307 			return (1);
    308 		}
    309 
    310 		if (WIFEXITED(status)) {
    311 			if (WEXITSTATUS(status) != 0)
    312 				return (WEXITSTATUS(status));
    313 		}
    314 		else if (WIFSIGNALED(status)) {
    315 			warnx("%s: %s", spec, strsignal(WTERMSIG(status)));
    316 			return (1);
    317 		}
    318 		break;
    319 	}
    320 
    321 	return (0);
    322 }
    323 
    324 
    325 static int
    326 selected(type)
    327 	const char *type;
    328 {
    329 	struct entry *e;
    330 
    331 	/* If no type specified, it's always selected. */
    332 	for (e = selhead.tqh_first; e != NULL; e = e->entries.tqe_next)
    333 		if (!strncmp(e->type, type, MFSNAMELEN))
    334 			return which == IN_LIST ? 1 : 0;
    335 
    336 	return which == IN_LIST ? 0 : 1;
    337 }
    338 
    339 
    340 static const char *
    341 getoptions(type)
    342 	const char *type;
    343 {
    344 	struct entry *e;
    345 
    346 	for (e = opthead.tqh_first; e != NULL; e = e->entries.tqe_next)
    347 		if (!strncmp(e->type, type, MFSNAMELEN))
    348 			return e->options;
    349 	return "";
    350 }
    351 
    352 
    353 static void
    354 addoption(optstr)
    355 	char *optstr;
    356 {
    357 	char *newoptions;
    358 	struct entry *e;
    359 
    360 	if ((newoptions = strchr(optstr, ':')) == NULL)
    361 		errx(1, "Invalid option string");
    362 
    363 	*newoptions++ = '\0';
    364 
    365 	for (e = opthead.tqh_first; e != NULL; e = e->entries.tqe_next)
    366 		if (!strncmp(e->type, optstr, MFSNAMELEN)) {
    367 			e->options = catopt(e->options, newoptions, 1);
    368 			return;
    369 		}
    370 	addentry(&opthead, optstr, newoptions);
    371 }
    372 
    373 
    374 static void
    375 addentry(list, type, opts)
    376 	struct fstypelist *list;
    377 	const char *type;
    378 	const char *opts;
    379 {
    380 	struct entry *e;
    381 
    382 	e = emalloc(sizeof(struct entry));
    383 	e->type = estrdup(type);
    384 	e->options = estrdup(opts);
    385 	TAILQ_INSERT_TAIL(list, e, entries);
    386 }
    387 
    388 
    389 static void
    390 maketypelist(fslist)
    391 	char *fslist;
    392 {
    393 	char *ptr;
    394 
    395 	if ((fslist == NULL) || (fslist[0] == '\0'))
    396 		errx(1, "empty type list");
    397 
    398 	if (fslist[0] == 'n' && fslist[1] == 'o') {
    399 		fslist += 2;
    400 		which = NOT_IN_LIST;
    401 	}
    402 	else
    403 		which = IN_LIST;
    404 
    405 	while ((ptr = strsep(&fslist, ",")) != NULL)
    406 		addentry(&selhead, ptr, "");
    407 
    408 }
    409 
    410 
    411 static char *
    412 catopt(s0, s1, fr)
    413 	char *s0;
    414 	const char *s1;
    415 	int fr;
    416 {
    417 	size_t i;
    418 	char *cp;
    419 
    420 	if (s0 && *s0) {
    421 		i = strlen(s0) + strlen(s1) + 1 + 1;
    422 		cp = emalloc(i);
    423 		(void)snprintf(cp, i, "%s,%s", s0, s1);
    424 	}
    425 	else
    426 		cp = estrdup(s1);
    427 
    428 	if (s0 && fr)
    429 		free(s0);
    430 	return (cp);
    431 }
    432 
    433 
    434 static void
    435 mangle(opts, argcp, argvp, maxargcp)
    436 	char *opts;
    437 	int *argcp;
    438 	const char ***argvp;
    439 	int *maxargcp;
    440 {
    441 	char *p, *s;
    442 	int argc = *argcp, maxargc = *maxargcp;
    443 	const char **argv = *argvp;
    444 
    445 	argc = *argcp;
    446 	maxargc = *maxargcp;
    447 
    448 	for (s = opts; (p = strsep(&s, ",")) != NULL;) {
    449 		/* always leave space for one more argument and the NULL */
    450 		if (argc >= maxargc - 3) {
    451 			maxargc += 50;
    452 			argv = erealloc(argv, maxargc * sizeof(char *));
    453 		}
    454 		if (*p != '\0')
    455 			if (*p == '-') {
    456 				argv[argc++] = p;
    457 				p = strchr(p, '=');
    458 				if (p) {
    459 					*p = '\0';
    460 					argv[argc++] = p+1;
    461 				}
    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) >= DKMAXTYPES)
    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