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fsck.c revision 1.3 
      1 /*	$NetBSD: fsck.c,v 1.3 1996/09/27 21:51:03 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 static char rcsid[] = "$NetBSD: fsck.c,v 1.3 1996/09/27 21:51:03 cgd Exp $";
     42 
     43 #include <sys/param.h>
     44 #include <sys/mount.h>
     45 #include <sys/queue.h>
     46 #include <sys/wait.h>
     47 
     48 #include <err.h>
     49 #include <errno.h>
     50 #include <fstab.h>
     51 #include <signal.h>
     52 #include <stdio.h>
     53 #include <stdlib.h>
     54 #include <string.h>
     55 #include <unistd.h>
     56 
     57 #include "pathnames.h"
     58 #include "extern.h"
     59 #include "util.h"
     60 
     61 static enum { IN_LIST, NOT_IN_LIST } which = NOT_IN_LIST;
     62 
     63 TAILQ_HEAD(fstypelist, entry) opthead, selhead;
     64 
     65 struct entry {
     66 	char *type;
     67 	char *options;
     68 	TAILQ_ENTRY(entry) entries;
     69 };
     70 
     71 static int preen = 0, maxrun = 0;
     72 int debug = 0, verbose = 0;
     73 static char *options = NULL;
     74 
     75 int main __P((int, char *[]));
     76 
     77 static int checkfs __P((const char *, const char *, pid_t *));
     78 static int selected __P((const char *));
     79 static void addoption __P((char *));
     80 static const char *getoptions __P((const char *));
     81 static void addentry __P((struct fstypelist *, const char *, const char *));
     82 static void maketypelist __P((char *));
     83 static char *catopt __P((char *, const char *, int));
     84 static void mangle __P((char *, int *, const char **));
     85 static void usage __P((void));
     86 static int isok __P((struct fstab *));
     87 
     88 
     89 int
     90 main(argc, argv)
     91 	int argc;
     92 	char *argv[];
     93 {
     94 	struct fstab *fs;
     95 	int i, rval = 0;
     96 	char *vfstype = NULL;
     97 
     98 	TAILQ_INIT(&selhead);
     99 	TAILQ_INIT(&opthead);
    100 
    101 	while ((i = getopt(argc, argv, "dvpnyl:t:T:")) != -1)
    102 		switch (i) {
    103 #ifdef DEBUG
    104 # define DEBUGOPT "d"
    105 		case 'd':
    106 			debug++;
    107 			break;
    108 #else
    109 # define DEBUGOPT ""
    110 #endif
    111 
    112 		case 'v':
    113 			verbose++;
    114 			break;
    115 
    116 		case 'y':
    117 			options = catopt(options, "-y", 1);
    118 			break;
    119 
    120 		case 'l':
    121 			maxrun = atoi(optarg);
    122 			break;
    123 
    124 		case 'n':
    125 			options = catopt(options, "-n", 1);
    126 			break;
    127 
    128 		case 'T':
    129 			if (*optarg)
    130 				addoption(optarg);
    131 			break;
    132 
    133 		case 't':
    134 			if (selhead.tqh_first != NULL)
    135 				errx(1, "only one -t option may be specified.");
    136 
    137 			maketypelist(optarg);
    138 			vfstype = optarg;
    139 			break;
    140 
    141 		case 'p':
    142 			options = catopt(options, "-p", 1);
    143 			preen++;
    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(preen, 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 				errx(1,
    170 				    "%s: unknown special file or file system.",
    171 				    *argv);
    172 			spec = *argv;
    173 			type = vfstype;
    174 		}
    175 		else {
    176 			spec = fs->fs_spec;
    177 			type = fs->fs_vfstype;
    178 			if (BADTYPE(fs->fs_type))
    179 				errx(1, "%s has unknown file system type.",
    180 				    *argv);
    181 		}
    182 
    183 		rval |= checkfs(type, blockcheck(spec), NULL);
    184 	}
    185 
    186 	return rval;
    187 }
    188 
    189 
    190 static int
    191 isok(fs)
    192 	struct fstab *fs;
    193 {
    194 	if (fs->fs_passno == 0)
    195 		return 0;
    196 
    197 	if (BADTYPE(fs->fs_type))
    198 		return 0;
    199 
    200 	if (!selected(fs->fs_vfstype))
    201 		return 0;
    202 
    203 	return 1;
    204 }
    205 
    206 
    207 static int
    208 checkfs(vfstype, spec, pidp)
    209 	const char *vfstype, *spec;
    210 	pid_t *pidp;
    211 {
    212 	/* List of directories containing fsck_xxx subcommands. */
    213 	static const char *edirs[] = {
    214 		_PATH_SBIN,
    215 		_PATH_USRSBIN,
    216 		NULL
    217 	};
    218 	const char *argv[100], **edir;
    219 	pid_t pid;
    220 	int argc, i, status;
    221 	char *optbuf = NULL, execname[MAXPATHLEN + 1];
    222 	const char *extra = getoptions(vfstype);
    223 
    224 #ifdef __GNUC__
    225 	/* Avoid vfork clobbering */
    226 	(void) &optbuf;
    227 #endif
    228 
    229 	if (strcmp(vfstype, "ufs") == 0)
    230 		vfstype = MOUNT_UFS;
    231 
    232 	argc = 0;
    233 	argv[argc++] = vfstype;
    234 
    235 	if (options) {
    236 		if (extra != NULL)
    237 			optbuf = catopt(options, extra, 0);
    238 		else
    239 			optbuf = estrdup(options);
    240 	}
    241 	else if (extra)
    242 		optbuf = estrdup(extra);
    243 
    244 	if (optbuf)
    245 		mangle(optbuf, &argc, argv);
    246 
    247 	argv[argc++] = spec;
    248 
    249 	if (debug || verbose) {
    250 		(void)printf("start %swait fsck_%s", pidp ? "no" : "",
    251 		    vfstype);
    252 		for (i = 1; i < argc; i++)
    253 			(void)printf(" %s", argv[i]);
    254 		(void)printf("\n");
    255 	}
    256 
    257 	switch (pid = vfork()) {
    258 	case -1:				/* Error. */
    259 		warn("vfork");
    260 		if (optbuf)
    261 			free(optbuf);
    262 		return (1);
    263 
    264 	case 0:					/* Child. */
    265 #ifdef DEBUG
    266 		if (debug)
    267 			_exit(0);
    268 #endif
    269 
    270 		/* Go find an executable. */
    271 		edir = edirs;
    272 		do {
    273 			(void)snprintf(execname,
    274 			    sizeof(execname), "%s/fsck_%s", *edir, vfstype);
    275 			execv(execname, (char * const *)argv);
    276 			if (errno != ENOENT)
    277 				if (spec)
    278 					warn("exec %s for %s", execname, spec);
    279 				else
    280 					warn("exec %s", execname);
    281 		} while (*++edir != NULL);
    282 
    283 		if (errno == ENOENT)
    284 			if (spec)
    285 				warn("exec %s for %s", execname, spec);
    286 			else
    287 				warn("exec %s", execname);
    288 		exit(1);
    289 		/* NOTREACHED */
    290 
    291 	default:				/* Parent. */
    292 		if (optbuf)
    293 			free(optbuf);
    294 
    295 		if (pidp) {
    296 			*pidp = pid;
    297 			return 0;
    298 		}
    299 
    300 		if (waitpid(pid, &status, 0) < 0) {
    301 			warn("waitpid");
    302 			return (1);
    303 		}
    304 
    305 		if (WIFEXITED(status)) {
    306 			if (WEXITSTATUS(status) != 0)
    307 				return (WEXITSTATUS(status));
    308 		}
    309 		else if (WIFSIGNALED(status)) {
    310 			warnx("%s: %s", spec, strsignal(WTERMSIG(status)));
    311 			return (1);
    312 		}
    313 		break;
    314 	}
    315 
    316 	return (0);
    317 }
    318 
    319 
    320 static int
    321 selected(type)
    322 	const char *type;
    323 {
    324 	struct entry *e;
    325 
    326 	/* If no type specified, it's always selected. */
    327 	for (e = selhead.tqh_first; e != NULL; e = e->entries.tqe_next)
    328 		if (!strncmp(e->type, type, MFSNAMELEN))
    329 			return which == IN_LIST ? 1 : 0;
    330 
    331 	return which == IN_LIST ? 0 : 1;
    332 }
    333 
    334 
    335 static const char *
    336 getoptions(type)
    337 	const char *type;
    338 {
    339 	struct entry *e;
    340 
    341 	for (e = opthead.tqh_first; e != NULL; e = e->entries.tqe_next)
    342 		if (!strncmp(e->type, type, MFSNAMELEN))
    343 			return e->options;
    344 	return "";
    345 }
    346 
    347 
    348 static void
    349 addoption(optstr)
    350 	char *optstr;
    351 {
    352 	char *newoptions;
    353 	struct entry *e;
    354 
    355 	if ((newoptions = strchr(optstr, ':')) == NULL)
    356 		errx(1, "Invalid option string");
    357 
    358 	*newoptions++ = '\0';
    359 
    360 	for (e = opthead.tqh_first; e != NULL; e = e->entries.tqe_next)
    361 		if (!strncmp(e->type, optstr, MFSNAMELEN)) {
    362 			e->options = catopt(e->options, newoptions, 1);
    363 			return;
    364 		}
    365 	addentry(&opthead, optstr, newoptions);
    366 }
    367 
    368 
    369 static void
    370 addentry(list, type, opts)
    371 	struct fstypelist *list;
    372 	const char *type;
    373 	const char *opts;
    374 {
    375 	struct entry *e;
    376 
    377 	e = emalloc(sizeof(struct entry));
    378 	e->type = estrdup(type);
    379 	e->options = estrdup(opts);
    380 	TAILQ_INSERT_TAIL(list, e, entries);
    381 }
    382 
    383 
    384 static void
    385 maketypelist(fslist)
    386 	char *fslist;
    387 {
    388 	char *ptr;
    389 
    390 	if ((fslist == NULL) || (fslist[0] == '\0'))
    391 		errx(1, "empty type list");
    392 
    393 	if (fslist[0] == 'n' && fslist[1] == 'o') {
    394 		fslist += 2;
    395 		which = NOT_IN_LIST;
    396 	}
    397 	else
    398 		which = IN_LIST;
    399 
    400 	while ((ptr = strsep(&fslist, ",")) != NULL)
    401 		addentry(&selhead, ptr, "");
    402 
    403 }
    404 
    405 
    406 static char *
    407 catopt(s0, s1, fr)
    408 	char *s0;
    409 	const char *s1;
    410 	int fr;
    411 {
    412 	size_t i;
    413 	char *cp;
    414 
    415 	if (s0 && *s0) {
    416 		i = strlen(s0) + strlen(s1) + 1 + 1;
    417 		cp = emalloc(i);
    418 		(void)snprintf(cp, i, "%s,%s", s0, s1);
    419 	}
    420 	else
    421 		cp = estrdup(s1);
    422 
    423 	if (s0 && fr)
    424 		free(s0);
    425 	return (cp);
    426 }
    427 
    428 
    429 static void
    430 mangle(opts, argcp, argv)
    431 	char *opts;
    432 	int *argcp;
    433 	const char **argv;
    434 {
    435 	char *p, *s;
    436 	int argc;
    437 
    438 	argc = *argcp;
    439 	for (s = opts; (p = strsep(&s, ",")) != NULL;)
    440 		if (*p != '\0')
    441 			if (*p == '-') {
    442 				argv[argc++] = p;
    443 				p = strchr(p, '=');
    444 				if (p) {
    445 					*p = '\0';
    446 					argv[argc++] = p+1;
    447 				}
    448 			}
    449 			else {
    450 				argv[argc++] = "-o";
    451 				argv[argc++] = p;
    452 			}
    453 
    454 	*argcp = argc;
    455 }
    456 
    457 
    458 static void
    459 usage()
    460 {
    461 	extern char *__progname;
    462 	static const char common[] =
    463 	    "pvlyn] [-T fstype:fsoptions] [-t fstype]";
    464 
    465 	(void)fprintf(stderr, "Usage: %s [-%s%s [special|node]...\n",
    466 	    __progname, DEBUGOPT, common);
    467 	exit(1);
    468 }
    469