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main.c revision 1.17 
      1 /*	$NetBSD: main.c,v 1.17 1995/07/12 01:49:21 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 1.17 1995/07/12 01:49:21 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 	skipclean = 1;
     83 	while ((ch = getopt(argc, argv, "dfpnNyYb:c:l:m:")) != EOF) {
     84 		switch (ch) {
     85 		case 'p':
     86 			preen++;
     87 			break;
     88 
     89 		case 'b':
     90 			skipclean = 0;
     91 			bflag = argtoi('b', "number", optarg, 10);
     92 			printf("Alternate super block location: %d\n", bflag);
     93 			break;
     94 
     95 		case 'c':
     96 			skipclean = 0;
     97 			cvtlevel = argtoi('c', "conversion level", optarg, 10);
     98 			break;
     99 
    100 		case 'd':
    101 			debug++;
    102 			break;
    103 
    104 		case 'f':
    105 			skipclean = 0;
    106 			break;
    107 
    108 		case 'l':
    109 			maxrun = argtoi('l', "number", optarg, 10);
    110 			break;
    111 
    112 		case 'm':
    113 			lfmode = argtoi('m', "mode", optarg, 8);
    114 			if (lfmode &~ 07777)
    115 				errexit("bad mode to -m: %o\n", lfmode);
    116 			printf("** lost+found creation mode %o\n", lfmode);
    117 			break;
    118 
    119 		case 'n':
    120 		case 'N':
    121 			nflag++;
    122 			yflag = 0;
    123 			break;
    124 
    125 		case 'y':
    126 		case 'Y':
    127 			yflag++;
    128 			nflag = 0;
    129 			break;
    130 
    131 		default:
    132 			errexit("%c option?\n", ch);
    133 		}
    134 	}
    135 	argc -= optind;
    136 	argv += optind;
    137 	if (signal(SIGINT, SIG_IGN) != SIG_IGN)
    138 		(void)signal(SIGINT, catch);
    139 	if (preen)
    140 		(void)signal(SIGQUIT, catchquit);
    141 	if (argc) {
    142 		while (argc-- > 0)
    143 			(void)checkfilesys(blockcheck(*argv++), 0, 0L, 0);
    144 		exit(0);
    145 	}
    146 	ret = checkfstab(preen, maxrun, docheck, checkfilesys);
    147 	if (returntosingle)
    148 		exit(2);
    149 	exit(ret);
    150 }
    151 
    152 int
    153 argtoi(flag, req, str, base)
    154 	int flag;
    155 	char *req, *str;
    156 	int base;
    157 {
    158 	char *cp;
    159 	int ret;
    160 
    161 	ret = (int)strtol(str, &cp, base);
    162 	if (cp == str || *cp)
    163 		errexit("-%c flag requires a %s\n", flag, req);
    164 	return (ret);
    165 }
    166 
    167 /*
    168  * Determine whether a filesystem should be checked.
    169  */
    170 int
    171 docheck(fsp)
    172 	register struct fstab *fsp;
    173 {
    174 
    175 	if (strcmp(fsp->fs_vfstype, "ufs") ||
    176 	    (strcmp(fsp->fs_type, FSTAB_RW) &&
    177 	     strcmp(fsp->fs_type, FSTAB_RO)) ||
    178 	    fsp->fs_passno == 0)
    179 		return (0);
    180 	return (1);
    181 }
    182 
    183 /*
    184  * Check the specified filesystem.
    185  */
    186 /* ARGSUSED */
    187 int
    188 checkfilesys(filesys, mntpt, auxdata, child)
    189 	char *filesys, *mntpt;
    190 	long auxdata;
    191 	int child;
    192 {
    193 	daddr_t n_ffree, n_bfree;
    194 	struct dups *dp;
    195 	struct zlncnt *zlnp;
    196 	int cylno;
    197 
    198 	if (preen && child)
    199 		(void)signal(SIGQUIT, voidquit);
    200 	cdevname = filesys;
    201 	if (debug && preen)
    202 		pwarn("starting\n");
    203 	switch (setup(filesys)) {
    204 	case 0:
    205 		if (preen)
    206 			pfatal("CAN'T CHECK FILE SYSTEM.");
    207 	case -1:
    208 		return (0);
    209 	}
    210 	/*
    211 	 * 1: scan inodes tallying blocks used
    212 	 */
    213 	if (preen == 0) {
    214 		printf("** Last Mounted on %s\n", sblock.fs_fsmnt);
    215 		if (hotroot)
    216 			printf("** Root file system\n");
    217 		printf("** Phase 1 - Check Blocks and Sizes\n");
    218 	}
    219 	pass1();
    220 
    221 	/*
    222 	 * 1b: locate first references to duplicates, if any
    223 	 */
    224 	if (duplist) {
    225 		if (preen)
    226 			pfatal("INTERNAL ERROR: dups with -p");
    227 		printf("** Phase 1b - Rescan For More DUPS\n");
    228 		pass1b();
    229 	}
    230 
    231 	/*
    232 	 * 2: traverse directories from root to mark all connected directories
    233 	 */
    234 	if (preen == 0)
    235 		printf("** Phase 2 - Check Pathnames\n");
    236 	pass2();
    237 
    238 	/*
    239 	 * 3: scan inodes looking for disconnected directories
    240 	 */
    241 	if (preen == 0)
    242 		printf("** Phase 3 - Check Connectivity\n");
    243 	pass3();
    244 
    245 	/*
    246 	 * 4: scan inodes looking for disconnected files; check reference counts
    247 	 */
    248 	if (preen == 0)
    249 		printf("** Phase 4 - Check Reference Counts\n");
    250 	pass4();
    251 
    252 	/*
    253 	 * 5: check and repair resource counts in cylinder groups
    254 	 */
    255 	if (preen == 0)
    256 		printf("** Phase 5 - Check Cyl groups\n");
    257 	pass5();
    258 
    259 	/*
    260 	 * print out summary statistics
    261 	 */
    262 	n_ffree = sblock.fs_cstotal.cs_nffree;
    263 	n_bfree = sblock.fs_cstotal.cs_nbfree;
    264 	pwarn("%ld files, %ld used, %ld free ",
    265 	    n_files, n_blks, n_ffree + sblock.fs_frag * n_bfree);
    266 	printf("(%ld frags, %ld blocks, %d.%d%% fragmentation)\n",
    267 	    n_ffree, n_bfree, (n_ffree * 100) / sblock.fs_dsize,
    268 	    ((n_ffree * 1000 + sblock.fs_dsize / 2) / sblock.fs_dsize) % 10);
    269 	if (debug &&
    270 	    (n_files -= maxino - ROOTINO - sblock.fs_cstotal.cs_nifree))
    271 		printf("%ld files missing\n", n_files);
    272 	if (debug) {
    273 		n_blks += sblock.fs_ncg *
    274 			(cgdmin(&sblock, 0) - cgsblock(&sblock, 0));
    275 		n_blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0);
    276 		n_blks += howmany(sblock.fs_cssize, sblock.fs_fsize);
    277 		if (n_blks -= maxfsblock - (n_ffree + sblock.fs_frag * n_bfree))
    278 			printf("%ld blocks missing\n", n_blks);
    279 		if (duplist != NULL) {
    280 			printf("The following duplicate blocks remain:");
    281 			for (dp = duplist; dp; dp = dp->next)
    282 				printf(" %ld,", dp->dup);
    283 			printf("\n");
    284 		}
    285 		if (zlnhead != NULL) {
    286 			printf("The following zero link count inodes remain:");
    287 			for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
    288 				printf(" %lu,", zlnp->zlncnt);
    289 			printf("\n");
    290 		}
    291 	}
    292 	zlnhead = (struct zlncnt *)0;
    293 	duplist = (struct dups *)0;
    294 	muldup = (struct dups *)0;
    295 	inocleanup();
    296 	if (fsmodified) {
    297 		(void)time(&sblock.fs_time);
    298 		sbdirty();
    299 	}
    300 	if (cvtlevel && sblk.b_dirty) {
    301 		/*
    302 		 * Write out the duplicate super blocks
    303 		 */
    304 		for (cylno = 0; cylno < sblock.fs_ncg; cylno++)
    305 			bwrite(fswritefd, (char *)&sblock,
    306 			    fsbtodb(&sblock, cgsblock(&sblock, cylno)), SBSIZE);
    307 	}
    308 	ckfini(1);
    309 	free(blockmap);
    310 	free(statemap);
    311 	free((char *)lncntp);
    312 	if (!fsmodified)
    313 		return (0);
    314 	if (!preen)
    315 		printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
    316 	if (hotroot) {
    317 		struct statfs stfs_buf;
    318 		/*
    319 		 * We modified the root.  Do a mount update on
    320 		 * it, unless it is read-write, so we can continue.
    321 		 */
    322 		if (statfs("/", &stfs_buf) == 0) {
    323 			long flags = stfs_buf.f_flags;
    324 			struct ufs_args args;
    325 			int ret;
    326 
    327 			if (flags & MNT_RDONLY) {
    328 				args.fspec = 0;
    329 				args.export.ex_flags = 0;
    330 				args.export.ex_root = 0;
    331 				flags |= MNT_UPDATE | MNT_RELOAD;
    332 				ret = mount(MOUNT_UFS, "/", flags, &args);
    333 				if (ret == 0)
    334 					return(0);
    335 			}
    336 		}
    337 		if (!preen)
    338 			printf("\n***** REBOOT NOW *****\n");
    339 		sync();
    340 		return (4);
    341 	}
    342 	return (0);
    343 }
    344