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main.c revision 1.13 
      1 /*
      2  * Copyright (c) 1980, 1986, 1993
      3  *	The Regents of the University of California.  All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *	This product includes software developed by the University of
     16  *	California, Berkeley and its contributors.
     17  * 4. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  */
     33 
     34 #ifndef lint
     35 static char copyright[] =
     36 "@(#) Copyright (c) 1980, 1986, 1993\n\
     37 	The Regents of the University of California.  All rights reserved.\n";
     38 #endif /* not lint */
     39 
     40 #ifndef lint
     41 /*static char sccsid[] = "from: @(#)main.c	8.2 (Berkeley) 1/23/94";*/
     42 static char *rcsid = "$Id: main.c,v 1.13 1994/06/08 19:00:24 mycroft Exp $";
     43 #endif /* not lint */
     44 
     45 #include <sys/param.h>
     46 #include <sys/time.h>
     47 #include <sys/mount.h>
     48 #include <ufs/ufs/dinode.h>
     49 #include <ufs/ffs/fs.h>
     50 #include <fstab.h>
     51 #include <stdlib.h>
     52 #include <string.h>
     53 #include <ctype.h>
     54 #include <stdio.h>
     55 #include "fsck.h"
     56 
     57 void	catch(), catchquit(), voidquit();
     58 int	returntosingle;
     59 
     60 main(argc, argv)
     61 	int	argc;
     62 	char	*argv[];
     63 {
     64 	int ch;
     65 	int ret, maxrun = 0;
     66 	extern int docheck(), checkfilesys();
     67 	extern char *optarg, *blockcheck();
     68 	extern int optind;
     69 
     70 	sync();
     71 	while ((ch = getopt(argc, argv, "dpnNyYb:c:l:m:")) != EOF) {
     72 		switch (ch) {
     73 		case 'p':
     74 			preen++;
     75 			break;
     76 
     77 		case 'b':
     78 			bflag = argtoi('b', "number", optarg, 10);
     79 			printf("Alternate super block location: %d\n", bflag);
     80 			break;
     81 
     82 		case 'c':
     83 			cvtlevel = argtoi('c', "conversion level", optarg, 10);
     84 			break;
     85 
     86 		case 'd':
     87 			debug++;
     88 			break;
     89 
     90 		case 'l':
     91 			maxrun = argtoi('l', "number", optarg, 10);
     92 			break;
     93 
     94 		case 'm':
     95 			lfmode = argtoi('m', "mode", optarg, 8);
     96 			if (lfmode &~ 07777)
     97 				errexit("bad mode to -m: %o\n", lfmode);
     98 			printf("** lost+found creation mode %o\n", lfmode);
     99 			break;
    100 
    101 		case 'n':
    102 		case 'N':
    103 			nflag++;
    104 			yflag = 0;
    105 			break;
    106 
    107 		case 'y':
    108 		case 'Y':
    109 			yflag++;
    110 			nflag = 0;
    111 			break;
    112 
    113 		default:
    114 			errexit("%c option?\n", ch);
    115 		}
    116 	}
    117 	argc -= optind;
    118 	argv += optind;
    119 	if (signal(SIGINT, SIG_IGN) != SIG_IGN)
    120 		(void)signal(SIGINT, catch);
    121 	if (preen)
    122 		(void)signal(SIGQUIT, catchquit);
    123 	if (argc) {
    124 		while (argc-- > 0)
    125 			(void)checkfilesys(blockcheck(*argv++), 0, 0L, 0);
    126 		exit(0);
    127 	}
    128 	ret = checkfstab(preen, maxrun, docheck, checkfilesys);
    129 	if (returntosingle)
    130 		exit(2);
    131 	exit(ret);
    132 }
    133 
    134 argtoi(flag, req, str, base)
    135 	int flag;
    136 	char *req, *str;
    137 	int base;
    138 {
    139 	char *cp;
    140 	int ret;
    141 
    142 	ret = (int)strtol(str, &cp, base);
    143 	if (cp == str || *cp)
    144 		errexit("-%c flag requires a %s\n", flag, req);
    145 	return (ret);
    146 }
    147 
    148 /*
    149  * Determine whether a filesystem should be checked.
    150  */
    151 docheck(fsp)
    152 	register struct fstab *fsp;
    153 {
    154 
    155 	if (strcmp(fsp->fs_vfstype, "ufs") ||
    156 	    (strcmp(fsp->fs_type, FSTAB_RW) &&
    157 	     strcmp(fsp->fs_type, FSTAB_RO)) ||
    158 	    fsp->fs_passno == 0)
    159 		return (0);
    160 	return (1);
    161 }
    162 
    163 /*
    164  * Check the specified filesystem.
    165  */
    166 /* ARGSUSED */
    167 checkfilesys(filesys, mntpt, auxdata, child)
    168 	char *filesys, *mntpt;
    169 	long auxdata;
    170 {
    171 	daddr_t n_ffree, n_bfree;
    172 	struct dups *dp;
    173 	struct zlncnt *zlnp;
    174 	int cylno;
    175 
    176 	if (preen && child)
    177 		(void)signal(SIGQUIT, voidquit);
    178 	cdevname = filesys;
    179 	if (debug && preen)
    180 		pwarn("starting\n");
    181 	if (setup(filesys) == 0) {
    182 		if (preen)
    183 			pfatal("CAN'T CHECK FILE SYSTEM.");
    184 		return (0);
    185 	}
    186 	/*
    187 	 * 1: scan inodes tallying blocks used
    188 	 */
    189 	if (preen == 0) {
    190 		printf("** Last Mounted on %s\n", sblock.fs_fsmnt);
    191 		if (hotroot)
    192 			printf("** Root file system\n");
    193 		printf("** Phase 1 - Check Blocks and Sizes\n");
    194 	}
    195 	pass1();
    196 
    197 	/*
    198 	 * 1b: locate first references to duplicates, if any
    199 	 */
    200 	if (duplist) {
    201 		if (preen)
    202 			pfatal("INTERNAL ERROR: dups with -p");
    203 		printf("** Phase 1b - Rescan For More DUPS\n");
    204 		pass1b();
    205 	}
    206 
    207 	/*
    208 	 * 2: traverse directories from root to mark all connected directories
    209 	 */
    210 	if (preen == 0)
    211 		printf("** Phase 2 - Check Pathnames\n");
    212 	pass2();
    213 
    214 	/*
    215 	 * 3: scan inodes looking for disconnected directories
    216 	 */
    217 	if (preen == 0)
    218 		printf("** Phase 3 - Check Connectivity\n");
    219 	pass3();
    220 
    221 	/*
    222 	 * 4: scan inodes looking for disconnected files; check reference counts
    223 	 */
    224 	if (preen == 0)
    225 		printf("** Phase 4 - Check Reference Counts\n");
    226 	pass4();
    227 
    228 	/*
    229 	 * 5: check and repair resource counts in cylinder groups
    230 	 */
    231 	if (preen == 0)
    232 		printf("** Phase 5 - Check Cyl groups\n");
    233 	pass5();
    234 
    235 	/*
    236 	 * print out summary statistics
    237 	 */
    238 	n_ffree = sblock.fs_cstotal.cs_nffree;
    239 	n_bfree = sblock.fs_cstotal.cs_nbfree;
    240 	pwarn("%ld files, %ld used, %ld free ",
    241 	    n_files, n_blks, n_ffree + sblock.fs_frag * n_bfree);
    242 	printf("(%ld frags, %ld blocks, %d.%d%% fragmentation)\n",
    243 	    n_ffree, n_bfree, (n_ffree * 100) / sblock.fs_dsize,
    244 	    ((n_ffree * 1000 + sblock.fs_dsize / 2) / sblock.fs_dsize) % 10);
    245 	if (debug &&
    246 	    (n_files -= maxino - ROOTINO - sblock.fs_cstotal.cs_nifree))
    247 		printf("%ld files missing\n", n_files);
    248 	if (debug) {
    249 		n_blks += sblock.fs_ncg *
    250 			(cgdmin(&sblock, 0) - cgsblock(&sblock, 0));
    251 		n_blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0);
    252 		n_blks += howmany(sblock.fs_cssize, sblock.fs_fsize);
    253 		if (n_blks -= maxfsblock - (n_ffree + sblock.fs_frag * n_bfree))
    254 			printf("%ld blocks missing\n", n_blks);
    255 		if (duplist != NULL) {
    256 			printf("The following duplicate blocks remain:");
    257 			for (dp = duplist; dp; dp = dp->next)
    258 				printf(" %ld,", dp->dup);
    259 			printf("\n");
    260 		}
    261 		if (zlnhead != NULL) {
    262 			printf("The following zero link count inodes remain:");
    263 			for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
    264 				printf(" %lu,", zlnp->zlncnt);
    265 			printf("\n");
    266 		}
    267 	}
    268 	zlnhead = (struct zlncnt *)0;
    269 	duplist = (struct dups *)0;
    270 	muldup = (struct dups *)0;
    271 	inocleanup();
    272 	if (fsmodified) {
    273 		(void)time(&sblock.fs_time);
    274 		sbdirty();
    275 	}
    276 	if (cvtlevel && sblk.b_dirty) {
    277 		/*
    278 		 * Write out the duplicate super blocks
    279 		 */
    280 		for (cylno = 0; cylno < sblock.fs_ncg; cylno++)
    281 			bwrite(fswritefd, (char *)&sblock,
    282 			    fsbtodb(&sblock, cgsblock(&sblock, cylno)), SBSIZE);
    283 	}
    284 	ckfini();
    285 	free(blockmap);
    286 	free(statemap);
    287 	free((char *)lncntp);
    288 	if (!fsmodified)
    289 		return (0);
    290 	if (!preen)
    291 		printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
    292 	if (hotroot) {
    293 		struct statfs stfs_buf;
    294 		/*
    295 		 * We modified the root.  Do a mount update on
    296 		 * it, unless it is read-write, so we can continue.
    297 		 */
    298 		if (statfs("/", &stfs_buf) == 0) {
    299 			long flags = stfs_buf.f_flags;
    300 			struct ufs_args args;
    301 			int ret;
    302 
    303 			if (flags & MNT_RDONLY) {
    304 				args.fspec = 0;
    305 				args.export.ex_flags = 0;
    306 				args.export.ex_root = 0;
    307 				flags |= MNT_UPDATE | MNT_RELOAD;
    308 				ret = mount(MOUNT_UFS, "/", flags, &args);
    309 				if (ret == 0)
    310 					return(0);
    311 			}
    312 		}
    313 		if (!preen)
    314 			printf("\n***** REBOOT NOW *****\n");
    315 		sync();
    316 		return (4);
    317 	}
    318 	return (0);
    319 }
    320