Home | History | Annotate | Line # | Download | only in fsck_ffs
main.c revision 1.23 
      1 /*	$NetBSD: main.c,v 1.23 1996/10/22 16:35:04 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 #ifndef lint
     37 static char copyright[] =
     38 "@(#) 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	8.2 (Berkeley) 1/23/94";
     45 #else
     46 static char rcsid[] = "$NetBSD: main.c,v 1.23 1996/10/22 16:35:04 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 <ufs/ufs/dinode.h>
     54 #include <ufs/ffs/fs.h>
     55 #include <fstab.h>
     56 #include <stdlib.h>
     57 #include <string.h>
     58 #include <ctype.h>
     59 #include <stdio.h>
     60 #include <unistd.h>
     61 
     62 #include "fsck.h"
     63 #include "extern.h"
     64 #include "fsutil.h"
     65 
     66 int	returntosingle;
     67 
     68 int	main __P((int, char *[]));
     69 
     70 static int	argtoi __P((int, char *, char *, int));
     71 static int	checkfilesys __P((char *, char *, long, int));
     72 static int	docheck __P((struct fstab *));
     73 static  void usage __P((void));
     74 
     75 
     76 int
     77 main(argc, argv)
     78 	int	argc;
     79 	char	*argv[];
     80 {
     81 	int ch;
     82 	int ret = 0;
     83 	extern char *optarg;
     84 	extern int optind;
     85 
     86 	sync();
     87 	skipclean = 1;
     88 	while ((ch = getopt(argc, argv, "b:c:dfm:npy")) != EOF) {
     89 		switch (ch) {
     90 		case 'b':
     91 			skipclean = 0;
     92 			bflag = argtoi('b', "number", optarg, 10);
     93 			printf("Alternate super block location: %d\n", bflag);
     94 			break;
     95 
     96 		case 'c':
     97 			skipclean = 0;
     98 			cvtlevel = argtoi('c', "conversion level", optarg, 10);
     99 			break;
    100 
    101 		case 'd':
    102 			debug++;
    103 			break;
    104 
    105 		case 'f':
    106 			skipclean = 0;
    107 			break;
    108 
    109 		case 'm':
    110 			lfmode = argtoi('m', "mode", optarg, 8);
    111 			if (lfmode &~ 07777)
    112 				errexit("bad mode to -m: %o\n", lfmode);
    113 			printf("** lost+found creation mode %o\n", lfmode);
    114 			break;
    115 
    116 		case 'n':
    117 			nflag++;
    118 			yflag = 0;
    119 			break;
    120 
    121 		case 'p':
    122 			preen++;
    123 			break;
    124 
    125 		case 'y':
    126 			yflag++;
    127 			nflag = 0;
    128 			break;
    129 
    130 		default:
    131 			usage();
    132 		}
    133 	}
    134 
    135 	argc -= optind;
    136 	argv += optind;
    137 
    138 	if (!argc)
    139 		usage();
    140 
    141 	if (signal(SIGINT, SIG_IGN) != SIG_IGN)
    142 		(void)signal(SIGINT, catch);
    143 	if (preen)
    144 		(void)signal(SIGQUIT, catchquit);
    145 
    146 	while (argc-- > 0)
    147 		(void)checkfilesys(blockcheck(*argv++), 0, 0L, 0);
    148 
    149 	if (returntosingle)
    150 		ret = 2;
    151 
    152 	exit(ret);
    153 }
    154 
    155 static int
    156 argtoi(flag, req, str, base)
    157 	int flag;
    158 	char *req, *str;
    159 	int base;
    160 {
    161 	char *cp;
    162 	int ret;
    163 
    164 	ret = (int)strtol(str, &cp, base);
    165 	if (cp == str || *cp)
    166 		errexit("-%c flag requires a %s\n", flag, req);
    167 	return (ret);
    168 }
    169 
    170 /*
    171  * Determine whether a filesystem should be checked.
    172  */
    173 static int
    174 docheck(fsp)
    175 	register struct fstab *fsp;
    176 {
    177 
    178 	if ((strcmp(fsp->fs_vfstype, "ufs") &&
    179 	     strcmp(fsp->fs_vfstype, "ffs")) ||
    180 	    (strcmp(fsp->fs_type, FSTAB_RW) &&
    181 	     strcmp(fsp->fs_type, FSTAB_RO)) ||
    182 	    fsp->fs_passno == 0)
    183 		return (0);
    184 	return (1);
    185 }
    186 
    187 /*
    188  * Check the specified filesystem.
    189  */
    190 /* ARGSUSED */
    191 static int
    192 checkfilesys(filesys, mntpt, auxdata, child)
    193 	char *filesys, *mntpt;
    194 	long auxdata;
    195 	int child;
    196 {
    197 	daddr_t n_ffree, n_bfree;
    198 	struct dups *dp;
    199 	struct zlncnt *zlnp;
    200 	int cylno;
    201 
    202 	if (preen && child)
    203 		(void)signal(SIGQUIT, voidquit);
    204 	setcdevname(filesys, preen);
    205 	if (debug && preen)
    206 		pwarn("starting\n");
    207 	switch (setup(filesys)) {
    208 	case 0:
    209 		if (preen)
    210 			pfatal("CAN'T CHECK FILE SYSTEM.");
    211 	case -1:
    212 		return (0);
    213 	}
    214 	/*
    215 	 * 1: scan inodes tallying blocks used
    216 	 */
    217 	if (preen == 0) {
    218 		printf("** Last Mounted on %s\n", sblock.fs_fsmnt);
    219 		if (hotroot())
    220 			printf("** Root file system\n");
    221 		printf("** Phase 1 - Check Blocks and Sizes\n");
    222 	}
    223 	pass1();
    224 
    225 	/*
    226 	 * 1b: locate first references to duplicates, if any
    227 	 */
    228 	if (duplist) {
    229 		if (preen)
    230 			pfatal("INTERNAL ERROR: dups with -p");
    231 		printf("** Phase 1b - Rescan For More DUPS\n");
    232 		pass1b();
    233 	}
    234 
    235 	/*
    236 	 * 2: traverse directories from root to mark all connected directories
    237 	 */
    238 	if (preen == 0)
    239 		printf("** Phase 2 - Check Pathnames\n");
    240 	pass2();
    241 
    242 	/*
    243 	 * 3: scan inodes looking for disconnected directories
    244 	 */
    245 	if (preen == 0)
    246 		printf("** Phase 3 - Check Connectivity\n");
    247 	pass3();
    248 
    249 	/*
    250 	 * 4: scan inodes looking for disconnected files; check reference counts
    251 	 */
    252 	if (preen == 0)
    253 		printf("** Phase 4 - Check Reference Counts\n");
    254 	pass4();
    255 
    256 	/*
    257 	 * 5: check and repair resource counts in cylinder groups
    258 	 */
    259 	if (preen == 0)
    260 		printf("** Phase 5 - Check Cyl groups\n");
    261 	pass5();
    262 
    263 	/*
    264 	 * print out summary statistics
    265 	 */
    266 	n_ffree = sblock.fs_cstotal.cs_nffree;
    267 	n_bfree = sblock.fs_cstotal.cs_nbfree;
    268 	pwarn("%d files, %d used, %d free ",
    269 	    n_files, n_blks, n_ffree + sblock.fs_frag * n_bfree);
    270 	printf("(%d frags, %d blocks, %d.%d%% fragmentation)\n",
    271 	    n_ffree, n_bfree, (n_ffree * 100) / sblock.fs_dsize,
    272 	    ((n_ffree * 1000 + sblock.fs_dsize / 2) / sblock.fs_dsize) % 10);
    273 	if (debug &&
    274 	    (n_files -= maxino - ROOTINO - sblock.fs_cstotal.cs_nifree))
    275 		printf("%d files missing\n", n_files);
    276 	if (debug) {
    277 		n_blks += sblock.fs_ncg *
    278 			(cgdmin(&sblock, 0) - cgsblock(&sblock, 0));
    279 		n_blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0);
    280 		n_blks += howmany(sblock.fs_cssize, sblock.fs_fsize);
    281 		if (n_blks -= maxfsblock - (n_ffree + sblock.fs_frag * n_bfree))
    282 			printf("%d blocks missing\n", n_blks);
    283 		if (duplist != NULL) {
    284 			printf("The following duplicate blocks remain:");
    285 			for (dp = duplist; dp; dp = dp->next)
    286 				printf(" %d,", dp->dup);
    287 			printf("\n");
    288 		}
    289 		if (zlnhead != NULL) {
    290 			printf("The following zero link count inodes remain:");
    291 			for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
    292 				printf(" %u,", zlnp->zlncnt);
    293 			printf("\n");
    294 		}
    295 	}
    296 	zlnhead = (struct zlncnt *)0;
    297 	duplist = (struct dups *)0;
    298 	muldup = (struct dups *)0;
    299 	inocleanup();
    300 	if (fsmodified) {
    301 		(void)time(&sblock.fs_time);
    302 		sbdirty();
    303 	}
    304 	if (cvtlevel && sblk.b_dirty) {
    305 		/*
    306 		 * Write out the duplicate super blocks
    307 		 */
    308 		for (cylno = 0; cylno < sblock.fs_ncg; cylno++)
    309 			bwrite(fswritefd, (char *)&sblock,
    310 			    fsbtodb(&sblock, cgsblock(&sblock, cylno)), SBSIZE);
    311 	}
    312 	ckfini(1);
    313 	free(blockmap);
    314 	free(statemap);
    315 	free((char *)lncntp);
    316 	if (!fsmodified)
    317 		return (0);
    318 	if (!preen)
    319 		printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
    320 	if (rerun)
    321 		printf("\n***** PLEASE RERUN FSCK *****\n");
    322 	if (hotroot()) {
    323 		struct statfs stfs_buf;
    324 		/*
    325 		 * We modified the root.  Do a mount update on
    326 		 * it, unless it is read-write, so we can continue.
    327 		 */
    328 		if (statfs("/", &stfs_buf) == 0) {
    329 			long flags = stfs_buf.f_flags;
    330 			struct ufs_args args;
    331 			int ret;
    332 
    333 			if (flags & MNT_RDONLY) {
    334 				args.fspec = 0;
    335 				args.export.ex_flags = 0;
    336 				args.export.ex_root = 0;
    337 				flags |= MNT_UPDATE | MNT_RELOAD;
    338 				ret = mount(MOUNT_FFS, "/", flags, &args);
    339 				if (ret == 0)
    340 					return(0);
    341 			}
    342 		}
    343 		if (!preen)
    344 			printf("\n***** REBOOT NOW *****\n");
    345 		sync();
    346 		return (4);
    347 	}
    348 	return (0);
    349 }
    350 
    351 static void
    352 usage()
    353 {
    354 	extern char *__progname;
    355 
    356 	(void) fprintf(stderr,
    357 	    "Usage: %s [-dfnpy] [-b block] [-c level] [-m mode] filesystem ...\n",
    358 	    __progname);
    359 	exit(1);
    360 }
    361 
    362