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main.c revision 1.42 
      1 /*	$NetBSD: main.c,v 1.42 2002/09/28 20:11:06 dbj 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. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #include <sys/cdefs.h>
     37 #ifndef lint
     38 __COPYRIGHT("@(#) Copyright (c) 1980, 1986, 1993\n\
     39 	The Regents of the University of California.  All rights reserved.\n");
     40 #endif /* not lint */
     41 
     42 #ifndef lint
     43 #if 0
     44 static char sccsid[] = "@(#)main.c	8.6 (Berkeley) 5/14/95";
     45 #else
     46 __RCSID("$NetBSD: main.c,v 1.42 2002/09/28 20:11:06 dbj Exp $");
     47 #endif
     48 #endif /* not lint */
     49 
     50 #include <sys/param.h>
     51 #include <sys/time.h>
     52 #include <sys/mount.h>
     53 #include <sys/resource.h>
     54 
     55 #include <ufs/ufs/dinode.h>
     56 #include <ufs/ufs/ufsmount.h>
     57 #include <ufs/ffs/fs.h>
     58 #include <ufs/ffs/ffs_extern.h>
     59 
     60 #include <ctype.h>
     61 #include <err.h>
     62 #include <fstab.h>
     63 #include <string.h>
     64 #include <time.h>
     65 #include <ctype.h>
     66 #include <stdio.h>
     67 #include <stdlib.h>
     68 #include <unistd.h>
     69 
     70 #include "fsck.h"
     71 #include "extern.h"
     72 #include "fsutil.h"
     73 
     74 int	returntosingle;
     75 
     76 int	main __P((int, char *[]));
     77 
     78 static int	argtoi __P((int, char *, char *, int));
     79 static int	checkfilesys __P((const char *, char *, long, int));
     80 static  void usage __P((void));
     81 
     82 int
     83 main(argc, argv)
     84 	int	argc;
     85 	char	*argv[];
     86 {
     87 	struct rlimit r;
     88 	int ch;
     89 	int ret = 0;
     90 
     91 	if (getrlimit(RLIMIT_DATA, &r) == 0) {
     92 		r.rlim_cur = r.rlim_max;
     93 		(void) setrlimit(RLIMIT_DATA, &r);
     94 	}
     95 	sync();
     96 	skipclean = 1;
     97 	markclean = 1;
     98 	forceimage = 0;
     99 	endian = 0;
    100 	isappleufs = 0;
    101 	while ((ch = getopt(argc, argv, "aB:b:c:dFfm:npy")) != -1) {
    102 		switch (ch) {
    103 		case 'a':
    104 			isappleufs = 1;
    105 			break;
    106 
    107 		case 'B':
    108 			if (strcmp(optarg, "be") == 0)
    109 				endian = BIG_ENDIAN;
    110 			else if (strcmp(optarg, "le") == 0)
    111 				endian = LITTLE_ENDIAN;
    112 			else usage();
    113 			break;
    114 
    115 		case 'b':
    116 			skipclean = 0;
    117 			bflag = argtoi('b', "number", optarg, 10);
    118 			printf("Alternate super block location: %d\n", bflag);
    119 			break;
    120 
    121 		case 'c':
    122 			skipclean = 0;
    123 			cvtlevel = argtoi('c', "conversion level", optarg, 10);
    124 			break;
    125 
    126 		case 'd':
    127 			debug++;
    128 			break;
    129 
    130 		case 'F':
    131 			forceimage = 1;
    132 			break;
    133 
    134 		case 'f':
    135 			skipclean = 0;
    136 			break;
    137 
    138 		case 'm':
    139 			lfmode = argtoi('m', "mode", optarg, 8);
    140 			if (lfmode &~ 07777)
    141 				errx(EEXIT, "bad mode to -m: %o", lfmode);
    142 			printf("** lost+found creation mode %o\n", lfmode);
    143 			break;
    144 
    145 		case 'n':
    146 			nflag++;
    147 			yflag = 0;
    148 			break;
    149 
    150 		case 'p':
    151 			preen++;
    152 			break;
    153 
    154 		case 'y':
    155 			yflag++;
    156 			nflag = 0;
    157 			break;
    158 
    159 		default:
    160 			usage();
    161 		}
    162 	}
    163 
    164 	argc -= optind;
    165 	argv += optind;
    166 
    167 	if (!argc)
    168 		usage();
    169 
    170 	if (signal(SIGINT, SIG_IGN) != SIG_IGN)
    171 		(void)signal(SIGINT, catch);
    172 	if (preen)
    173 		(void)signal(SIGQUIT, catchquit);
    174 	signal(SIGINFO, infohandler);
    175 
    176 	while (argc-- > 0)
    177 		(void)checkfilesys(blockcheck(*argv++), 0, 0L, 0);
    178 
    179 	if (returntosingle)
    180 		ret = 2;
    181 
    182 	exit(ret);
    183 }
    184 
    185 static int
    186 argtoi(flag, req, str, base)
    187 	int flag;
    188 	char *req, *str;
    189 	int base;
    190 {
    191 	char *cp;
    192 	int ret;
    193 
    194 	ret = (int)strtol(str, &cp, base);
    195 	if (cp == str || *cp)
    196 		errx(EEXIT, "-%c flag requires a %s", flag, req);
    197 	return (ret);
    198 }
    199 
    200 /*
    201  * Check the specified filesystem.
    202  */
    203 /* ARGSUSED */
    204 static int
    205 checkfilesys(filesys, mntpt, auxdata, child)
    206 	const char *filesys;
    207 	char *mntpt;
    208 	long auxdata;
    209 	int child;
    210 {
    211 	ufs_daddr_t n_ffree, n_bfree;
    212 	struct dups *dp;
    213 	struct zlncnt *zlnp;
    214 #ifdef LITE2BORKEN
    215 	int flags;
    216 #endif
    217 
    218 	if (preen && child)
    219 		(void)signal(SIGQUIT, voidquit);
    220 	setcdevname(filesys, preen);
    221 	if (debug && preen)
    222 		pwarn("starting\n");
    223 	switch (setup(filesys)) {
    224 	case 0:
    225 		if (preen)
    226 			pfatal("CAN'T CHECK FILE SYSTEM.");
    227 		/* fall through */
    228 	case -1:
    229 		return (0);
    230 	}
    231 	/*
    232 	 * Cleared if any questions answered no. Used to decide if
    233 	 * the superblock should be marked clean.
    234 	 */
    235 	resolved = 1;
    236 	/*
    237 	 * 1: scan inodes tallying blocks used
    238 	 */
    239 	if (preen == 0) {
    240 		printf("** Last Mounted on %s\n", sblock->fs_fsmnt);
    241 		if (hotroot())
    242 			printf("** Root file system\n");
    243 		printf("** Phase 1 - Check Blocks and Sizes\n");
    244 	}
    245 	pass1();
    246 
    247 	/*
    248 	 * 1b: locate first references to duplicates, if any
    249 	 */
    250 	if (duplist) {
    251 		if (preen)
    252 			pfatal("INTERNAL ERROR: dups with -p\n");
    253 		if (usedsoftdep)
    254 			pfatal("INTERNAL ERROR: dups with softdep\n");
    255 		printf("** Phase 1b - Rescan For More DUPS\n");
    256 		pass1b();
    257 	}
    258 
    259 	/*
    260 	 * 2: traverse directories from root to mark all connected directories
    261 	 */
    262 	if (preen == 0)
    263 		printf("** Phase 2 - Check Pathnames\n");
    264 	pass2();
    265 
    266 	/*
    267 	 * 3: scan inodes looking for disconnected directories
    268 	 */
    269 	if (preen == 0)
    270 		printf("** Phase 3 - Check Connectivity\n");
    271 	pass3();
    272 
    273 	/*
    274 	 * 4: scan inodes looking for disconnected files; check reference counts
    275 	 */
    276 	if (preen == 0)
    277 		printf("** Phase 4 - Check Reference Counts\n");
    278 	pass4();
    279 
    280 	/*
    281 	 * 5: check and repair resource counts in cylinder groups
    282 	 */
    283 	if (preen == 0)
    284 		printf("** Phase 5 - Check Cyl groups\n");
    285 	pass5();
    286 
    287 	/*
    288 	 * print out summary statistics
    289 	 */
    290 	n_ffree = sblock->fs_cstotal.cs_nffree;
    291 	n_bfree = sblock->fs_cstotal.cs_nbfree;
    292 	pwarn("%d files, %d used, %d free ",
    293 	    n_files, n_blks, n_ffree + sblock->fs_frag * n_bfree);
    294 	printf("(%d frags, %d blocks, %d.%d%% fragmentation)\n",
    295 	    n_ffree, n_bfree, (n_ffree * 100) / sblock->fs_dsize,
    296 	    ((n_ffree * 1000 + sblock->fs_dsize / 2) / sblock->fs_dsize) % 10);
    297 	if (debug &&
    298 	    (n_files -= maxino - ROOTINO - sblock->fs_cstotal.cs_nifree))
    299 		printf("%d files missing\n", n_files);
    300 	if (debug) {
    301 		n_blks += sblock->fs_ncg *
    302 			(cgdmin(sblock, 0) - cgsblock(sblock, 0));
    303 		n_blks += cgsblock(sblock, 0) - cgbase(sblock, 0);
    304 		n_blks += howmany(sblock->fs_cssize, sblock->fs_fsize);
    305 		if (n_blks -= maxfsblock - (n_ffree + sblock->fs_frag * n_bfree))
    306 			printf("%d blocks missing\n", n_blks);
    307 		if (duplist != NULL) {
    308 			printf("The following duplicate blocks remain:");
    309 			for (dp = duplist; dp; dp = dp->next)
    310 				printf(" %d,", dp->dup);
    311 			printf("\n");
    312 		}
    313 		if (zlnhead != NULL) {
    314 			printf("The following zero link count inodes remain:");
    315 			for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
    316 				printf(" %u,", zlnp->zlncnt);
    317 			printf("\n");
    318 		}
    319 	}
    320 	zlnhead = (struct zlncnt *)0;
    321 	duplist = (struct dups *)0;
    322 	muldup = (struct dups *)0;
    323 	inocleanup();
    324 	if (fsmodified) {
    325 		time_t t;
    326 		(void)time(&t);
    327 		sblock->fs_time = t;
    328 		sbdirty();
    329 	}
    330 	if (rerun)
    331 		markclean = 0;
    332 #if LITE2BORKEN
    333 	if (!hotroot()) {
    334 		ckfini();
    335 	} else {
    336 		struct statfs stfs_buf;
    337 		/*
    338 		 * Check to see if root is mounted read-write.
    339 		 */
    340 		if (statfs("/", &stfs_buf) == 0)
    341 			flags = stfs_buf.f_flags;
    342 		else
    343 			flags = 0;
    344 		if (markclean)
    345 			markclean = flags & MNT_RDONLY;
    346 		ckfini();
    347 	}
    348 #else
    349 	ckfini();
    350 #endif
    351 	free(blockmap);
    352 	free(statemap);
    353 	free((char *)lncntp);
    354 	if (!fsmodified)
    355 		return (0);
    356 	if (!preen)
    357 		printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
    358 	if (rerun)
    359 		printf("\n***** PLEASE RERUN FSCK *****\n");
    360 	if (hotroot()) {
    361 		struct statfs stfs_buf;
    362 		/*
    363 		 * We modified the root.  Do a mount update on
    364 		 * it, unless it is read-write, so we can continue.
    365 		 */
    366 		if (statfs("/", &stfs_buf) == 0) {
    367 			long flags = stfs_buf.f_flags;
    368 			struct ufs_args args;
    369 			int ret;
    370 
    371 			if (flags & MNT_RDONLY) {
    372 				args.fspec = 0;
    373 				args.export.ex_flags = 0;
    374 				args.export.ex_root = 0;
    375 				flags |= MNT_UPDATE | MNT_RELOAD;
    376 				ret = mount(MOUNT_FFS, "/", flags, &args);
    377 				if (ret == 0)
    378 					return(0);
    379 			}
    380 		}
    381 		if (!preen)
    382 			printf("\n***** REBOOT NOW *****\n");
    383 		sync();
    384 		return (4);
    385 	}
    386 	return (0);
    387 }
    388 
    389 static void
    390 usage()
    391 {
    392 
    393 	(void) fprintf(stderr,
    394 	    "Usage: %s [-dFfnpy] [-B be|le] [-b block] [-c level] [-m mode]"
    395 	    " filesystem ...\n",
    396 	    getprogname());
    397 	exit(1);
    398 }
    399 
    400