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main.c revision 1.46 
      1 /*	$NetBSD: main.c,v 1.46 2003/08/07 10:04:20 agc Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1980, 1986, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 #ifndef lint
     34 __COPYRIGHT("@(#) Copyright (c) 1980, 1986, 1993\n\
     35 	The Regents of the University of California.  All rights reserved.\n");
     36 #endif /* not lint */
     37 
     38 #ifndef lint
     39 #if 0
     40 static char sccsid[] = "@(#)main.c	8.6 (Berkeley) 5/14/95";
     41 #else
     42 __RCSID("$NetBSD: main.c,v 1.46 2003/08/07 10:04:20 agc Exp $");
     43 #endif
     44 #endif /* not lint */
     45 
     46 #include <sys/param.h>
     47 #include <sys/time.h>
     48 #include <sys/mount.h>
     49 #include <sys/resource.h>
     50 
     51 #include <ufs/ufs/dinode.h>
     52 #include <ufs/ufs/ufsmount.h>
     53 #include <ufs/ffs/fs.h>
     54 #include <ufs/ffs/ffs_extern.h>
     55 
     56 #include <ctype.h>
     57 #include <err.h>
     58 #include <fstab.h>
     59 #include <string.h>
     60 #include <time.h>
     61 #include <ctype.h>
     62 #include <stdio.h>
     63 #include <stdlib.h>
     64 #include <unistd.h>
     65 
     66 #include "fsck.h"
     67 #include "extern.h"
     68 #include "fsutil.h"
     69 
     70 int	returntosingle;
     71 
     72 int	main __P((int, char *[]));
     73 
     74 static int	argtoi __P((int, char *, char *, int));
     75 static int	checkfilesys __P((const char *, char *, long, int));
     76 static  void usage __P((void));
     77 
     78 int
     79 main(argc, argv)
     80 	int	argc;
     81 	char	*argv[];
     82 {
     83 	struct rlimit r;
     84 	int ch;
     85 	int ret = 0;
     86 
     87 	if (getrlimit(RLIMIT_DATA, &r) == 0) {
     88 		r.rlim_cur = r.rlim_max;
     89 		(void) setrlimit(RLIMIT_DATA, &r);
     90 	}
     91 	sync();
     92 	skipclean = 1;
     93 	markclean = 1;
     94 	forceimage = 0;
     95 	endian = 0;
     96 	isappleufs = 0;
     97 	while ((ch = getopt(argc, argv, "aB:b:c:dFfm:npy")) != -1) {
     98 		switch (ch) {
     99 		case 'a':
    100 			isappleufs = 1;
    101 			break;
    102 
    103 		case 'B':
    104 			if (strcmp(optarg, "be") == 0)
    105 				endian = BIG_ENDIAN;
    106 			else if (strcmp(optarg, "le") == 0)
    107 				endian = LITTLE_ENDIAN;
    108 			else usage();
    109 			break;
    110 
    111 		case 'b':
    112 			skipclean = 0;
    113 			bflag = argtoi('b', "number", optarg, 10);
    114 			printf("Alternate super block location: %d\n", bflag);
    115 			break;
    116 
    117 		case 'c':
    118 			skipclean = 0;
    119 			cvtlevel = argtoi('c', "conversion level", optarg, 10);
    120 			break;
    121 
    122 		case 'd':
    123 			debug++;
    124 			break;
    125 
    126 		case 'F':
    127 			forceimage = 1;
    128 			break;
    129 
    130 		case 'f':
    131 			skipclean = 0;
    132 			break;
    133 
    134 		case 'm':
    135 			lfmode = argtoi('m', "mode", optarg, 8);
    136 			if (lfmode &~ 07777)
    137 				errx(EEXIT, "bad mode to -m: %o", lfmode);
    138 			printf("** lost+found creation mode %o\n", lfmode);
    139 			break;
    140 
    141 		case 'n':
    142 			nflag++;
    143 			yflag = 0;
    144 			break;
    145 
    146 		case 'p':
    147 			preen++;
    148 			break;
    149 
    150 		case 'y':
    151 			yflag++;
    152 			nflag = 0;
    153 			break;
    154 
    155 		default:
    156 			usage();
    157 		}
    158 	}
    159 
    160 	argc -= optind;
    161 	argv += optind;
    162 
    163 	if (!argc)
    164 		usage();
    165 
    166 	if (signal(SIGINT, SIG_IGN) != SIG_IGN)
    167 		(void)signal(SIGINT, catch);
    168 	if (preen)
    169 		(void)signal(SIGQUIT, catchquit);
    170 	signal(SIGINFO, infohandler);
    171 
    172 	while (argc-- > 0) {
    173 		const char *path = blockcheck(*argv);
    174 
    175 		if (path == NULL)
    176 			pfatal("Can't check %s\n", *argv);
    177 		else
    178 			(void)checkfilesys(blockcheck(*argv), 0, 0L, 0);
    179 		argv++;
    180 	}
    181 
    182 	if (returntosingle)
    183 		ret = 2;
    184 
    185 	exit(ret);
    186 }
    187 
    188 static int
    189 argtoi(flag, req, str, base)
    190 	int flag;
    191 	char *req, *str;
    192 	int base;
    193 {
    194 	char *cp;
    195 	int ret;
    196 
    197 	ret = (int)strtol(str, &cp, base);
    198 	if (cp == str || *cp)
    199 		errx(EEXIT, "-%c flag requires a %s", flag, req);
    200 	return (ret);
    201 }
    202 
    203 /*
    204  * Check the specified filesystem.
    205  */
    206 /* ARGSUSED */
    207 static int
    208 checkfilesys(filesys, mntpt, auxdata, child)
    209 	const char *filesys;
    210 	char *mntpt;
    211 	long auxdata;
    212 	int child;
    213 {
    214 	daddr_t n_ffree, n_bfree;
    215 	struct dups *dp;
    216 	struct zlncnt *zlnp;
    217 	int cylno;
    218 #ifdef LITE2BORKEN
    219 	int flags;
    220 #endif
    221 
    222 	if (preen && child)
    223 		(void)signal(SIGQUIT, voidquit);
    224 	setcdevname(filesys, preen);
    225 	if (debug && preen)
    226 		pwarn("starting\n");
    227 	switch (setup(filesys)) {
    228 	case 0:
    229 		if (preen)
    230 			pfatal("CAN'T CHECK FILE SYSTEM.");
    231 		/* fall through */
    232 	case -1:
    233 		return (0);
    234 	}
    235 	/*
    236 	 * Cleared if any questions answered no. Used to decide if
    237 	 * the superblock should be marked clean.
    238 	 */
    239 	resolved = 1;
    240 	/*
    241 	 * 1: scan inodes tallying blocks used
    242 	 */
    243 	if (preen == 0) {
    244 		printf("** Last Mounted on %s\n", sblock->fs_fsmnt);
    245 		if (hotroot())
    246 			printf("** Root file system\n");
    247 		printf("** Phase 1 - Check Blocks and Sizes\n");
    248 	}
    249 	pass1();
    250 
    251 	/*
    252 	 * 1b: locate first references to duplicates, if any
    253 	 */
    254 	if (duplist) {
    255 		if (preen)
    256 			pfatal("INTERNAL ERROR: dups with -p\n");
    257 		if (usedsoftdep)
    258 			pfatal("INTERNAL ERROR: dups with softdep\n");
    259 		printf("** Phase 1b - Rescan For More DUPS\n");
    260 		pass1b();
    261 	}
    262 
    263 	/*
    264 	 * 2: traverse directories from root to mark all connected directories
    265 	 */
    266 	if (preen == 0)
    267 		printf("** Phase 2 - Check Pathnames\n");
    268 	pass2();
    269 
    270 	/*
    271 	 * 3: scan inodes looking for disconnected directories
    272 	 */
    273 	if (preen == 0)
    274 		printf("** Phase 3 - Check Connectivity\n");
    275 	pass3();
    276 
    277 	/*
    278 	 * 4: scan inodes looking for disconnected files; check reference counts
    279 	 */
    280 	if (preen == 0)
    281 		printf("** Phase 4 - Check Reference Counts\n");
    282 	pass4();
    283 
    284 	/*
    285 	 * 5: check and repair resource counts in cylinder groups
    286 	 */
    287 	if (preen == 0)
    288 		printf("** Phase 5 - Check Cyl groups\n");
    289 	pass5();
    290 
    291 	/*
    292 	 * print out summary statistics
    293 	 */
    294 	n_ffree = sblock->fs_cstotal.cs_nffree;
    295 	n_bfree = sblock->fs_cstotal.cs_nbfree;
    296 	pwarn("%d files, %lld used, %lld free ",
    297 	    n_files, (long long)n_blks,
    298 	    (long long)(n_ffree + sblock->fs_frag * n_bfree));
    299 	printf("(%lld frags, %lld blocks, %lld.%lld%% fragmentation)\n",
    300 	    (long long)n_ffree, (long long)n_bfree,
    301 	    (long long)(n_ffree * 100 / (daddr_t)sblock->fs_dsize),
    302 	    (long long)(((n_ffree * 1000 + (daddr_t)sblock->fs_dsize / 2)
    303 		/ (daddr_t)sblock->fs_dsize) % 10));
    304 	if (debug &&
    305 	    (n_files -= maxino - ROOTINO - sblock->fs_cstotal.cs_nifree))
    306 		printf("%d files missing\n", n_files);
    307 	if (debug) {
    308 		n_blks += sblock->fs_ncg *
    309 			(cgdmin(sblock, 0) - cgsblock(sblock, 0));
    310 		n_blks += cgsblock(sblock, 0) - cgbase(sblock, 0);
    311 		n_blks += howmany(sblock->fs_cssize, sblock->fs_fsize);
    312 		if (n_blks -= maxfsblock - (n_ffree + sblock->fs_frag * n_bfree))
    313 			printf("%lld blocks missing\n", (long long)n_blks);
    314 		if (duplist != NULL) {
    315 			printf("The following duplicate blocks remain:");
    316 			for (dp = duplist; dp; dp = dp->next)
    317 				printf(" %lld,", (long long)dp->dup);
    318 			printf("\n");
    319 		}
    320 		if (zlnhead != NULL) {
    321 			printf("The following zero link count inodes remain:");
    322 			for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
    323 				printf(" %u,", zlnp->zlncnt);
    324 			printf("\n");
    325 		}
    326 	}
    327 	zlnhead = (struct zlncnt *)0;
    328 	duplist = (struct dups *)0;
    329 	muldup = (struct dups *)0;
    330 	inocleanup();
    331 	if (fsmodified) {
    332 		sblock->fs_time = time(NULL);
    333 		sbdirty();
    334 	}
    335 	if (rerun)
    336 		markclean = 0;
    337 #if LITE2BORKEN
    338 	if (!hotroot()) {
    339 		ckfini();
    340 	} else {
    341 		struct statfs stfs_buf;
    342 		/*
    343 		 * Check to see if root is mounted read-write.
    344 		 */
    345 		if (statfs("/", &stfs_buf) == 0)
    346 			flags = stfs_buf.f_flags;
    347 		else
    348 			flags = 0;
    349 		if (markclean)
    350 			markclean = flags & MNT_RDONLY;
    351 		ckfini();
    352 	}
    353 #else
    354 	ckfini();
    355 #endif
    356 	for (cylno = 0; cylno < sblock->fs_ncg; cylno++)
    357 		if (inostathead[cylno].il_stat != NULL)
    358 			free(inostathead[cylno].il_stat);
    359 	free(inostathead);
    360 	inostathead = NULL;
    361 
    362 	if (!fsmodified)
    363 		return (0);
    364 	if (!preen)
    365 		printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
    366 	if (rerun)
    367 		printf("\n***** PLEASE RERUN FSCK *****\n");
    368 	if (hotroot()) {
    369 		struct statfs stfs_buf;
    370 		/*
    371 		 * We modified the root.  Do a mount update on
    372 		 * it, unless it is read-write, so we can continue.
    373 		 */
    374 		if (statfs("/", &stfs_buf) == 0) {
    375 			long flags = stfs_buf.f_flags;
    376 			struct ufs_args args;
    377 			int ret;
    378 
    379 			if (flags & MNT_RDONLY) {
    380 				args.fspec = 0;
    381 				args.export.ex_flags = 0;
    382 				args.export.ex_root = 0;
    383 				flags |= MNT_UPDATE | MNT_RELOAD;
    384 				ret = mount(MOUNT_FFS, "/", flags, &args);
    385 				if (ret == 0)
    386 					return(0);
    387 			}
    388 		}
    389 		if (!preen)
    390 			printf("\n***** REBOOT NOW *****\n");
    391 		sync();
    392 		return (4);
    393 	}
    394 	return (0);
    395 }
    396 
    397 static void
    398 usage()
    399 {
    400 
    401 	(void) fprintf(stderr,
    402 	    "Usage: %s [-dFfnpy] [-B be|le] [-b block] [-c level] [-m mode]"
    403 	    " filesystem ...\n",
    404 	    getprogname());
    405 	exit(1);
    406 }
    407 
    408