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main.c revision 1.15 
      1 /*	$NetBSD: main.c,v 1.15 1995/03/18 14:55:48 cgd 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 1.15 1995/03/18 14:55:48 cgd 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 
     65 void	catch(), catchquit(), voidquit();
     66 int	returntosingle;
     67 int argtoi __P((int, char *, char *, int));
     68 int checkfilesys __P((char *, char *, long, int));
     69 int docheck __P((struct fstab *));
     70 
     71 int
     72 main(argc, argv)
     73 	int	argc;
     74 	char	*argv[];
     75 {
     76 	int ch;
     77 	int ret, maxrun = 0;
     78 	extern char *optarg, *blockcheck();
     79 	extern int optind;
     80 
     81 	sync();
     82 	while ((ch = getopt(argc, argv, "dpnNyYb:c:l:m:")) != EOF) {
     83 		switch (ch) {
     84 		case 'p':
     85 			preen++;
     86 			break;
     87 
     88 		case 'b':
     89 			bflag = argtoi('b', "number", optarg, 10);
     90 			printf("Alternate super block location: %d\n", bflag);
     91 			break;
     92 
     93 		case 'c':
     94 			cvtlevel = argtoi('c', "conversion level", optarg, 10);
     95 			break;
     96 
     97 		case 'd':
     98 			debug++;
     99 			break;
    100 
    101 		case 'l':
    102 			maxrun = argtoi('l', "number", optarg, 10);
    103 			break;
    104 
    105 		case 'm':
    106 			lfmode = argtoi('m', "mode", optarg, 8);
    107 			if (lfmode &~ 07777)
    108 				errexit("bad mode to -m: %o\n", lfmode);
    109 			printf("** lost+found creation mode %o\n", lfmode);
    110 			break;
    111 
    112 		case 'n':
    113 		case 'N':
    114 			nflag++;
    115 			yflag = 0;
    116 			break;
    117 
    118 		case 'y':
    119 		case 'Y':
    120 			yflag++;
    121 			nflag = 0;
    122 			break;
    123 
    124 		default:
    125 			errexit("%c option?\n", ch);
    126 		}
    127 	}
    128 	argc -= optind;
    129 	argv += optind;
    130 	if (signal(SIGINT, SIG_IGN) != SIG_IGN)
    131 		(void)signal(SIGINT, catch);
    132 	if (preen)
    133 		(void)signal(SIGQUIT, catchquit);
    134 	if (argc) {
    135 		while (argc-- > 0)
    136 			(void)checkfilesys(blockcheck(*argv++), 0, 0L, 0);
    137 		exit(0);
    138 	}
    139 	ret = checkfstab(preen, maxrun, docheck, checkfilesys);
    140 	if (returntosingle)
    141 		exit(2);
    142 	exit(ret);
    143 }
    144 
    145 int
    146 argtoi(flag, req, str, base)
    147 	int flag;
    148 	char *req, *str;
    149 	int base;
    150 {
    151 	char *cp;
    152 	int ret;
    153 
    154 	ret = (int)strtol(str, &cp, base);
    155 	if (cp == str || *cp)
    156 		errexit("-%c flag requires a %s\n", flag, req);
    157 	return (ret);
    158 }
    159 
    160 /*
    161  * Determine whether a filesystem should be checked.
    162  */
    163 int
    164 docheck(fsp)
    165 	register struct fstab *fsp;
    166 {
    167 
    168 	if (strcmp(fsp->fs_vfstype, "ufs") ||
    169 	    (strcmp(fsp->fs_type, FSTAB_RW) &&
    170 	     strcmp(fsp->fs_type, FSTAB_RO)) ||
    171 	    fsp->fs_passno == 0)
    172 		return (0);
    173 	return (1);
    174 }
    175 
    176 /*
    177  * Check the specified filesystem.
    178  */
    179 /* ARGSUSED */
    180 int
    181 checkfilesys(filesys, mntpt, auxdata, child)
    182 	char *filesys, *mntpt;
    183 	long auxdata;
    184 	int child;
    185 {
    186 	daddr_t n_ffree, n_bfree;
    187 	struct dups *dp;
    188 	struct zlncnt *zlnp;
    189 	int cylno;
    190 
    191 	if (preen && child)
    192 		(void)signal(SIGQUIT, voidquit);
    193 	cdevname = filesys;
    194 	if (debug && preen)
    195 		pwarn("starting\n");
    196 	if (setup(filesys) == 0) {
    197 		if (preen)
    198 			pfatal("CAN'T CHECK FILE SYSTEM.");
    199 		return (0);
    200 	}
    201 	/*
    202 	 * 1: scan inodes tallying blocks used
    203 	 */
    204 	if (preen == 0) {
    205 		printf("** Last Mounted on %s\n", sblock.fs_fsmnt);
    206 		if (hotroot)
    207 			printf("** Root file system\n");
    208 		printf("** Phase 1 - Check Blocks and Sizes\n");
    209 	}
    210 	pass1();
    211 
    212 	/*
    213 	 * 1b: locate first references to duplicates, if any
    214 	 */
    215 	if (duplist) {
    216 		if (preen)
    217 			pfatal("INTERNAL ERROR: dups with -p");
    218 		printf("** Phase 1b - Rescan For More DUPS\n");
    219 		pass1b();
    220 	}
    221 
    222 	/*
    223 	 * 2: traverse directories from root to mark all connected directories
    224 	 */
    225 	if (preen == 0)
    226 		printf("** Phase 2 - Check Pathnames\n");
    227 	pass2();
    228 
    229 	/*
    230 	 * 3: scan inodes looking for disconnected directories
    231 	 */
    232 	if (preen == 0)
    233 		printf("** Phase 3 - Check Connectivity\n");
    234 	pass3();
    235 
    236 	/*
    237 	 * 4: scan inodes looking for disconnected files; check reference counts
    238 	 */
    239 	if (preen == 0)
    240 		printf("** Phase 4 - Check Reference Counts\n");
    241 	pass4();
    242 
    243 	/*
    244 	 * 5: check and repair resource counts in cylinder groups
    245 	 */
    246 	if (preen == 0)
    247 		printf("** Phase 5 - Check Cyl groups\n");
    248 	pass5();
    249 
    250 	/*
    251 	 * print out summary statistics
    252 	 */
    253 	n_ffree = sblock.fs_cstotal.cs_nffree;
    254 	n_bfree = sblock.fs_cstotal.cs_nbfree;
    255 	pwarn("%ld files, %ld used, %ld free ",
    256 	    n_files, n_blks, n_ffree + sblock.fs_frag * n_bfree);
    257 	printf("(%ld frags, %ld blocks, %d.%d%% fragmentation)\n",
    258 	    n_ffree, n_bfree, (n_ffree * 100) / sblock.fs_dsize,
    259 	    ((n_ffree * 1000 + sblock.fs_dsize / 2) / sblock.fs_dsize) % 10);
    260 	if (debug &&
    261 	    (n_files -= maxino - ROOTINO - sblock.fs_cstotal.cs_nifree))
    262 		printf("%ld files missing\n", n_files);
    263 	if (debug) {
    264 		n_blks += sblock.fs_ncg *
    265 			(cgdmin(&sblock, 0) - cgsblock(&sblock, 0));
    266 		n_blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0);
    267 		n_blks += howmany(sblock.fs_cssize, sblock.fs_fsize);
    268 		if (n_blks -= maxfsblock - (n_ffree + sblock.fs_frag * n_bfree))
    269 			printf("%ld blocks missing\n", n_blks);
    270 		if (duplist != NULL) {
    271 			printf("The following duplicate blocks remain:");
    272 			for (dp = duplist; dp; dp = dp->next)
    273 				printf(" %ld,", dp->dup);
    274 			printf("\n");
    275 		}
    276 		if (zlnhead != NULL) {
    277 			printf("The following zero link count inodes remain:");
    278 			for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
    279 				printf(" %lu,", zlnp->zlncnt);
    280 			printf("\n");
    281 		}
    282 	}
    283 	zlnhead = (struct zlncnt *)0;
    284 	duplist = (struct dups *)0;
    285 	muldup = (struct dups *)0;
    286 	inocleanup();
    287 	if (fsmodified) {
    288 		(void)time(&sblock.fs_time);
    289 		sbdirty();
    290 	}
    291 	if (cvtlevel && sblk.b_dirty) {
    292 		/*
    293 		 * Write out the duplicate super blocks
    294 		 */
    295 		for (cylno = 0; cylno < sblock.fs_ncg; cylno++)
    296 			bwrite(fswritefd, (char *)&sblock,
    297 			    fsbtodb(&sblock, cgsblock(&sblock, cylno)), SBSIZE);
    298 	}
    299 	ckfini();
    300 	free(blockmap);
    301 	free(statemap);
    302 	free((char *)lncntp);
    303 	if (!fsmodified)
    304 		return (0);
    305 	if (!preen)
    306 		printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
    307 	if (hotroot) {
    308 		struct statfs stfs_buf;
    309 		/*
    310 		 * We modified the root.  Do a mount update on
    311 		 * it, unless it is read-write, so we can continue.
    312 		 */
    313 		if (statfs("/", &stfs_buf) == 0) {
    314 			long flags = stfs_buf.f_flags;
    315 			struct ufs_args args;
    316 			int ret;
    317 
    318 			if (flags & MNT_RDONLY) {
    319 				args.fspec = 0;
    320 				args.export.ex_flags = 0;
    321 				args.export.ex_root = 0;
    322 				flags |= MNT_UPDATE | MNT_RELOAD;
    323 				ret = mount(MOUNT_UFS, "/", flags, &args);
    324 				if (ret == 0)
    325 					return(0);
    326 			}
    327 		}
    328 		if (!preen)
    329 			printf("\n***** REBOOT NOW *****\n");
    330 		sync();
    331 		return (4);
    332 	}
    333 	return (0);
    334 }
    335