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main.c revision 1.39 
      1 /*	$NetBSD: main.c,v 1.39 2001/02/23 07:51:41 christos 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 1.39 2001/02/23 07:51:41 christos 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 	endian = 0;
     99 	while ((ch = getopt(argc, argv, "B:b:c:dfm:npy")) != -1) {
    100 		switch (ch) {
    101 		case 'B':
    102 			if (strcmp(optarg, "be") == 0)
    103 				endian = BIG_ENDIAN;
    104 			else if (strcmp(optarg, "le") == 0)
    105 				endian = LITTLE_ENDIAN;
    106 			else usage();
    107 			break;
    108 
    109 		case 'b':
    110 			skipclean = 0;
    111 			bflag = argtoi('b', "number", optarg, 10);
    112 			printf("Alternate super block location: %d\n", bflag);
    113 			break;
    114 
    115 		case 'c':
    116 			skipclean = 0;
    117 			cvtlevel = argtoi('c', "conversion level", optarg, 10);
    118 			break;
    119 
    120 		case 'd':
    121 			debug++;
    122 			break;
    123 
    124 		case 'f':
    125 			skipclean = 0;
    126 			break;
    127 
    128 		case 'm':
    129 			lfmode = argtoi('m', "mode", optarg, 8);
    130 			if (lfmode &~ 07777)
    131 				errx(EEXIT, "bad mode to -m: %o", lfmode);
    132 			printf("** lost+found creation mode %o\n", lfmode);
    133 			break;
    134 
    135 		case 'n':
    136 			nflag++;
    137 			yflag = 0;
    138 			break;
    139 
    140 		case 'p':
    141 			preen++;
    142 			break;
    143 
    144 		case 'y':
    145 			yflag++;
    146 			nflag = 0;
    147 			break;
    148 
    149 		default:
    150 			usage();
    151 		}
    152 	}
    153 
    154 	argc -= optind;
    155 	argv += optind;
    156 
    157 	if (!argc)
    158 		usage();
    159 
    160 	if (signal(SIGINT, SIG_IGN) != SIG_IGN)
    161 		(void)signal(SIGINT, catch);
    162 	if (preen)
    163 		(void)signal(SIGQUIT, catchquit);
    164 
    165 	while (argc-- > 0)
    166 		(void)checkfilesys(blockcheck(*argv++), 0, 0L, 0);
    167 
    168 	if (returntosingle)
    169 		ret = 2;
    170 
    171 	exit(ret);
    172 }
    173 
    174 static int
    175 argtoi(flag, req, str, base)
    176 	int flag;
    177 	char *req, *str;
    178 	int base;
    179 {
    180 	char *cp;
    181 	int ret;
    182 
    183 	ret = (int)strtol(str, &cp, base);
    184 	if (cp == str || *cp)
    185 		errx(EEXIT, "-%c flag requires a %s", flag, req);
    186 	return (ret);
    187 }
    188 
    189 /*
    190  * Check the specified filesystem.
    191  */
    192 /* ARGSUSED */
    193 static int
    194 checkfilesys(filesys, mntpt, auxdata, child)
    195 	const char *filesys;
    196 	char *mntpt;
    197 	long auxdata;
    198 	int child;
    199 {
    200 	ufs_daddr_t n_ffree, n_bfree;
    201 	struct dups *dp;
    202 	struct zlncnt *zlnp;
    203 #ifdef LITE2BORKEN
    204 	int flags;
    205 #endif
    206 
    207 	if (preen && child)
    208 		(void)signal(SIGQUIT, voidquit);
    209 	setcdevname(filesys, preen);
    210 	if (debug && preen)
    211 		pwarn("starting\n");
    212 	switch (setup(filesys)) {
    213 	case 0:
    214 		if (preen)
    215 			pfatal("CAN'T CHECK FILE SYSTEM.");
    216 		/* fall through */
    217 	case -1:
    218 		return (0);
    219 	}
    220 	/*
    221 	 * Cleared if any questions answered no. Used to decide if
    222 	 * the superblock should be marked clean.
    223 	 */
    224 	resolved = 1;
    225 	/*
    226 	 * 1: scan inodes tallying blocks used
    227 	 */
    228 	if (preen == 0) {
    229 		printf("** Last Mounted on %s\n", sblock->fs_fsmnt);
    230 		if (hotroot())
    231 			printf("** Root file system\n");
    232 		printf("** Phase 1 - Check Blocks and Sizes\n");
    233 	}
    234 	pass1();
    235 
    236 	/*
    237 	 * 1b: locate first references to duplicates, if any
    238 	 */
    239 	if (duplist) {
    240 		if (preen)
    241 			pfatal("INTERNAL ERROR: dups with -p\n");
    242 		if (usedsoftdep)
    243 			pfatal("INTERNAL ERROR: dups with softdep\n");
    244 		printf("** Phase 1b - Rescan For More DUPS\n");
    245 		pass1b();
    246 	}
    247 
    248 	/*
    249 	 * 2: traverse directories from root to mark all connected directories
    250 	 */
    251 	if (preen == 0)
    252 		printf("** Phase 2 - Check Pathnames\n");
    253 	pass2();
    254 
    255 	/*
    256 	 * 3: scan inodes looking for disconnected directories
    257 	 */
    258 	if (preen == 0)
    259 		printf("** Phase 3 - Check Connectivity\n");
    260 	pass3();
    261 
    262 	/*
    263 	 * 4: scan inodes looking for disconnected files; check reference counts
    264 	 */
    265 	if (preen == 0)
    266 		printf("** Phase 4 - Check Reference Counts\n");
    267 	pass4();
    268 
    269 	/*
    270 	 * 5: check and repair resource counts in cylinder groups
    271 	 */
    272 	if (preen == 0)
    273 		printf("** Phase 5 - Check Cyl groups\n");
    274 	pass5();
    275 
    276 	/*
    277 	 * print out summary statistics
    278 	 */
    279 	n_ffree = sblock->fs_cstotal.cs_nffree;
    280 	n_bfree = sblock->fs_cstotal.cs_nbfree;
    281 	pwarn("%d files, %d used, %d free ",
    282 	    n_files, n_blks, n_ffree + sblock->fs_frag * n_bfree);
    283 	printf("(%d frags, %d blocks, %d.%d%% fragmentation)\n",
    284 	    n_ffree, n_bfree, (n_ffree * 100) / sblock->fs_dsize,
    285 	    ((n_ffree * 1000 + sblock->fs_dsize / 2) / sblock->fs_dsize) % 10);
    286 	if (debug &&
    287 	    (n_files -= maxino - ROOTINO - sblock->fs_cstotal.cs_nifree))
    288 		printf("%d files missing\n", n_files);
    289 	if (debug) {
    290 		n_blks += sblock->fs_ncg *
    291 			(cgdmin(sblock, 0) - cgsblock(sblock, 0));
    292 		n_blks += cgsblock(sblock, 0) - cgbase(sblock, 0);
    293 		n_blks += howmany(sblock->fs_cssize, sblock->fs_fsize);
    294 		if (n_blks -= maxfsblock - (n_ffree + sblock->fs_frag * n_bfree))
    295 			printf("%d blocks missing\n", n_blks);
    296 		if (duplist != NULL) {
    297 			printf("The following duplicate blocks remain:");
    298 			for (dp = duplist; dp; dp = dp->next)
    299 				printf(" %d,", dp->dup);
    300 			printf("\n");
    301 		}
    302 		if (zlnhead != NULL) {
    303 			printf("The following zero link count inodes remain:");
    304 			for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
    305 				printf(" %u,", zlnp->zlncnt);
    306 			printf("\n");
    307 		}
    308 	}
    309 	zlnhead = (struct zlncnt *)0;
    310 	duplist = (struct dups *)0;
    311 	muldup = (struct dups *)0;
    312 	inocleanup();
    313 	if (fsmodified) {
    314 		time_t t;
    315 		(void)time(&t);
    316 		sblock->fs_time = t;
    317 		sbdirty();
    318 	}
    319 	if (rerun)
    320 		markclean = 0;
    321 #if LITE2BORKEN
    322 	if (!hotroot()) {
    323 		ckfini();
    324 	} else {
    325 		struct statfs stfs_buf;
    326 		/*
    327 		 * Check to see if root is mounted read-write.
    328 		 */
    329 		if (statfs("/", &stfs_buf) == 0)
    330 			flags = stfs_buf.f_flags;
    331 		else
    332 			flags = 0;
    333 		if (markclean)
    334 			markclean = flags & MNT_RDONLY;
    335 		ckfini();
    336 	}
    337 #else
    338 	ckfini();
    339 #endif
    340 	free(blockmap);
    341 	free(statemap);
    342 	free((char *)lncntp);
    343 	if (!fsmodified)
    344 		return (0);
    345 	if (!preen)
    346 		printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
    347 	if (rerun)
    348 		printf("\n***** PLEASE RERUN FSCK *****\n");
    349 	if (hotroot()) {
    350 		struct statfs stfs_buf;
    351 		/*
    352 		 * We modified the root.  Do a mount update on
    353 		 * it, unless it is read-write, so we can continue.
    354 		 */
    355 		if (statfs("/", &stfs_buf) == 0) {
    356 			long flags = stfs_buf.f_flags;
    357 			struct ufs_args args;
    358 			int ret;
    359 
    360 			if (flags & MNT_RDONLY) {
    361 				args.fspec = 0;
    362 				args.export.ex_flags = 0;
    363 				args.export.ex_root = 0;
    364 				flags |= MNT_UPDATE | MNT_RELOAD;
    365 				ret = mount(MOUNT_FFS, "/", flags, &args);
    366 				if (ret == 0)
    367 					return(0);
    368 			}
    369 		}
    370 		if (!preen)
    371 			printf("\n***** REBOOT NOW *****\n");
    372 		sync();
    373 		return (4);
    374 	}
    375 	return (0);
    376 }
    377 
    378 static void
    379 usage()
    380 {
    381 
    382 	(void) fprintf(stderr,
    383 	    "Usage: %s [-dfnpy] [-B be|le] [-b block] [-c level] [-m mode]"
    384 			"filesystem ...\n",
    385 	    getprogname());
    386 	exit(1);
    387 }
    388 
    389