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main.c revision 1.14 
      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 1.14 1994/12/05 20:15:52 cgd 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 <unistd.h>
     56 
     57 #include "fsck.h"
     58 #include "extern.h"
     59 
     60 void	catch(), catchquit(), voidquit();
     61 int	returntosingle;
     62 int argtoi __P((int, char *, char *, int));
     63 int checkfilesys __P((char *, char *, long, int));
     64 int docheck __P((struct fstab *));
     65 
     66 int
     67 main(argc, argv)
     68 	int	argc;
     69 	char	*argv[];
     70 {
     71 	int ch;
     72 	int ret, maxrun = 0;
     73 	extern char *optarg, *blockcheck();
     74 	extern int optind;
     75 
     76 	sync();
     77 	while ((ch = getopt(argc, argv, "dpnNyYb:c:l:m:")) != EOF) {
     78 		switch (ch) {
     79 		case 'p':
     80 			preen++;
     81 			break;
     82 
     83 		case 'b':
     84 			bflag = argtoi('b', "number", optarg, 10);
     85 			printf("Alternate super block location: %d\n", bflag);
     86 			break;
     87 
     88 		case 'c':
     89 			cvtlevel = argtoi('c', "conversion level", optarg, 10);
     90 			break;
     91 
     92 		case 'd':
     93 			debug++;
     94 			break;
     95 
     96 		case 'l':
     97 			maxrun = argtoi('l', "number", optarg, 10);
     98 			break;
     99 
    100 		case 'm':
    101 			lfmode = argtoi('m', "mode", optarg, 8);
    102 			if (lfmode &~ 07777)
    103 				errexit("bad mode to -m: %o\n", lfmode);
    104 			printf("** lost+found creation mode %o\n", lfmode);
    105 			break;
    106 
    107 		case 'n':
    108 		case 'N':
    109 			nflag++;
    110 			yflag = 0;
    111 			break;
    112 
    113 		case 'y':
    114 		case 'Y':
    115 			yflag++;
    116 			nflag = 0;
    117 			break;
    118 
    119 		default:
    120 			errexit("%c option?\n", ch);
    121 		}
    122 	}
    123 	argc -= optind;
    124 	argv += optind;
    125 	if (signal(SIGINT, SIG_IGN) != SIG_IGN)
    126 		(void)signal(SIGINT, catch);
    127 	if (preen)
    128 		(void)signal(SIGQUIT, catchquit);
    129 	if (argc) {
    130 		while (argc-- > 0)
    131 			(void)checkfilesys(blockcheck(*argv++), 0, 0L, 0);
    132 		exit(0);
    133 	}
    134 	ret = checkfstab(preen, maxrun, docheck, checkfilesys);
    135 	if (returntosingle)
    136 		exit(2);
    137 	exit(ret);
    138 }
    139 
    140 int
    141 argtoi(flag, req, str, base)
    142 	int flag;
    143 	char *req, *str;
    144 	int base;
    145 {
    146 	char *cp;
    147 	int ret;
    148 
    149 	ret = (int)strtol(str, &cp, base);
    150 	if (cp == str || *cp)
    151 		errexit("-%c flag requires a %s\n", flag, req);
    152 	return (ret);
    153 }
    154 
    155 /*
    156  * Determine whether a filesystem should be checked.
    157  */
    158 int
    159 docheck(fsp)
    160 	register struct fstab *fsp;
    161 {
    162 
    163 	if (strcmp(fsp->fs_vfstype, "ufs") ||
    164 	    (strcmp(fsp->fs_type, FSTAB_RW) &&
    165 	     strcmp(fsp->fs_type, FSTAB_RO)) ||
    166 	    fsp->fs_passno == 0)
    167 		return (0);
    168 	return (1);
    169 }
    170 
    171 /*
    172  * Check the specified filesystem.
    173  */
    174 /* ARGSUSED */
    175 int
    176 checkfilesys(filesys, mntpt, auxdata, child)
    177 	char *filesys, *mntpt;
    178 	long auxdata;
    179 	int child;
    180 {
    181 	daddr_t n_ffree, n_bfree;
    182 	struct dups *dp;
    183 	struct zlncnt *zlnp;
    184 	int cylno;
    185 
    186 	if (preen && child)
    187 		(void)signal(SIGQUIT, voidquit);
    188 	cdevname = filesys;
    189 	if (debug && preen)
    190 		pwarn("starting\n");
    191 	if (setup(filesys) == 0) {
    192 		if (preen)
    193 			pfatal("CAN'T CHECK FILE SYSTEM.");
    194 		return (0);
    195 	}
    196 	/*
    197 	 * 1: scan inodes tallying blocks used
    198 	 */
    199 	if (preen == 0) {
    200 		printf("** Last Mounted on %s\n", sblock.fs_fsmnt);
    201 		if (hotroot)
    202 			printf("** Root file system\n");
    203 		printf("** Phase 1 - Check Blocks and Sizes\n");
    204 	}
    205 	pass1();
    206 
    207 	/*
    208 	 * 1b: locate first references to duplicates, if any
    209 	 */
    210 	if (duplist) {
    211 		if (preen)
    212 			pfatal("INTERNAL ERROR: dups with -p");
    213 		printf("** Phase 1b - Rescan For More DUPS\n");
    214 		pass1b();
    215 	}
    216 
    217 	/*
    218 	 * 2: traverse directories from root to mark all connected directories
    219 	 */
    220 	if (preen == 0)
    221 		printf("** Phase 2 - Check Pathnames\n");
    222 	pass2();
    223 
    224 	/*
    225 	 * 3: scan inodes looking for disconnected directories
    226 	 */
    227 	if (preen == 0)
    228 		printf("** Phase 3 - Check Connectivity\n");
    229 	pass3();
    230 
    231 	/*
    232 	 * 4: scan inodes looking for disconnected files; check reference counts
    233 	 */
    234 	if (preen == 0)
    235 		printf("** Phase 4 - Check Reference Counts\n");
    236 	pass4();
    237 
    238 	/*
    239 	 * 5: check and repair resource counts in cylinder groups
    240 	 */
    241 	if (preen == 0)
    242 		printf("** Phase 5 - Check Cyl groups\n");
    243 	pass5();
    244 
    245 	/*
    246 	 * print out summary statistics
    247 	 */
    248 	n_ffree = sblock.fs_cstotal.cs_nffree;
    249 	n_bfree = sblock.fs_cstotal.cs_nbfree;
    250 	pwarn("%ld files, %ld used, %ld free ",
    251 	    n_files, n_blks, n_ffree + sblock.fs_frag * n_bfree);
    252 	printf("(%ld frags, %ld blocks, %d.%d%% fragmentation)\n",
    253 	    n_ffree, n_bfree, (n_ffree * 100) / sblock.fs_dsize,
    254 	    ((n_ffree * 1000 + sblock.fs_dsize / 2) / sblock.fs_dsize) % 10);
    255 	if (debug &&
    256 	    (n_files -= maxino - ROOTINO - sblock.fs_cstotal.cs_nifree))
    257 		printf("%ld files missing\n", n_files);
    258 	if (debug) {
    259 		n_blks += sblock.fs_ncg *
    260 			(cgdmin(&sblock, 0) - cgsblock(&sblock, 0));
    261 		n_blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0);
    262 		n_blks += howmany(sblock.fs_cssize, sblock.fs_fsize);
    263 		if (n_blks -= maxfsblock - (n_ffree + sblock.fs_frag * n_bfree))
    264 			printf("%ld blocks missing\n", n_blks);
    265 		if (duplist != NULL) {
    266 			printf("The following duplicate blocks remain:");
    267 			for (dp = duplist; dp; dp = dp->next)
    268 				printf(" %ld,", dp->dup);
    269 			printf("\n");
    270 		}
    271 		if (zlnhead != NULL) {
    272 			printf("The following zero link count inodes remain:");
    273 			for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
    274 				printf(" %lu,", zlnp->zlncnt);
    275 			printf("\n");
    276 		}
    277 	}
    278 	zlnhead = (struct zlncnt *)0;
    279 	duplist = (struct dups *)0;
    280 	muldup = (struct dups *)0;
    281 	inocleanup();
    282 	if (fsmodified) {
    283 		(void)time(&sblock.fs_time);
    284 		sbdirty();
    285 	}
    286 	if (cvtlevel && sblk.b_dirty) {
    287 		/*
    288 		 * Write out the duplicate super blocks
    289 		 */
    290 		for (cylno = 0; cylno < sblock.fs_ncg; cylno++)
    291 			bwrite(fswritefd, (char *)&sblock,
    292 			    fsbtodb(&sblock, cgsblock(&sblock, cylno)), SBSIZE);
    293 	}
    294 	ckfini();
    295 	free(blockmap);
    296 	free(statemap);
    297 	free((char *)lncntp);
    298 	if (!fsmodified)
    299 		return (0);
    300 	if (!preen)
    301 		printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
    302 	if (hotroot) {
    303 		struct statfs stfs_buf;
    304 		/*
    305 		 * We modified the root.  Do a mount update on
    306 		 * it, unless it is read-write, so we can continue.
    307 		 */
    308 		if (statfs("/", &stfs_buf) == 0) {
    309 			long flags = stfs_buf.f_flags;
    310 			struct ufs_args args;
    311 			int ret;
    312 
    313 			if (flags & MNT_RDONLY) {
    314 				args.fspec = 0;
    315 				args.export.ex_flags = 0;
    316 				args.export.ex_root = 0;
    317 				flags |= MNT_UPDATE | MNT_RELOAD;
    318 				ret = mount(MOUNT_UFS, "/", flags, &args);
    319 				if (ret == 0)
    320 					return(0);
    321 			}
    322 		}
    323 		if (!preen)
    324 			printf("\n***** REBOOT NOW *****\n");
    325 		sync();
    326 		return (4);
    327 	}
    328 	return (0);
    329 }
    330