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main.c revision 1.10 
      1 /*	$NetBSD: main.c,v 1.10 2001/02/19 22:56:19 cgd Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1997 Manuel Bouyer.
      5  * Copyright (c) 1980, 1986, 1993
      6  *	The Regents of the University of California.  All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *	This product includes software developed by the University of
     19  *	California, Berkeley and its contributors.
     20  * 4. Neither the name of the University nor the names of its contributors
     21  *    may be used to endorse or promote products derived from this software
     22  *    without specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  */
     36 
     37 #include <sys/cdefs.h>
     38 #ifndef lint
     39 __COPYRIGHT("@(#) Copyright (c) 1980, 1986, 1993\n\
     40 	The Regents of the University of California.  All rights reserved.\n");
     41 #endif /* not lint */
     42 
     43 #ifndef lint
     44 #if 0
     45 static char sccsid[] = "@(#)main.c	8.2 (Berkeley) 1/23/94";
     46 #else
     47 __RCSID("$NetBSD: main.c,v 1.10 2001/02/19 22:56:19 cgd Exp $");
     48 #endif
     49 #endif /* not lint */
     50 
     51 #include <sys/param.h>
     52 #include <sys/time.h>
     53 #include <sys/mount.h>
     54 #include <ufs/ufs/ufsmount.h>
     55 #include <ufs/ext2fs/ext2fs_dinode.h>
     56 #include <ufs/ext2fs/ext2fs.h>
     57 #include <fstab.h>
     58 #include <stdlib.h>
     59 #include <string.h>
     60 #include <ctype.h>
     61 #include <stdio.h>
     62 #include <time.h>
     63 #include <unistd.h>
     64 
     65 #include "fsck.h"
     66 #include "extern.h"
     67 #include "fsutil.h"
     68 
     69 int	returntosingle;
     70 
     71 int	main __P((int, char *[]));
     72 
     73 static int	argtoi __P((int, char *, char *, int));
     74 static int	checkfilesys __P((const char *, char *, long, int));
     75 static  void usage __P((void));
     76 
     77 int
     78 main(argc, argv)
     79 	int	argc;
     80 	char	*argv[];
     81 {
     82 	int ch;
     83 	int ret = 0;
     84 
     85 	sync();
     86 	skipclean = 1;
     87 	while ((ch = getopt(argc, argv, "b:c:dfm:npy")) != -1) {
     88 		switch (ch) {
     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 'd':
     96 			debug++;
     97 			break;
     98 
     99 		case 'f':
    100 			skipclean = 0;
    101 			break;
    102 
    103 		case 'm':
    104 			lfmode = argtoi('m', "mode", optarg, 8);
    105 			if (lfmode &~ 07777)
    106 				errexit("bad mode to -m: %o\n", lfmode);
    107 			printf("** lost+found creation mode %o\n", lfmode);
    108 			break;
    109 
    110 		case 'n':
    111 			nflag++;
    112 			yflag = 0;
    113 			break;
    114 
    115 		case 'p':
    116 			preen++;
    117 			break;
    118 
    119 		case 'y':
    120 			yflag++;
    121 			nflag = 0;
    122 			break;
    123 
    124 		default:
    125 			usage();
    126 		}
    127 	}
    128 
    129 	argc -= optind;
    130 	argv += optind;
    131 
    132 	if (!argc)
    133 		usage();
    134 
    135 	if (signal(SIGINT, SIG_IGN) != SIG_IGN)
    136 		(void)signal(SIGINT, catch);
    137 	if (preen)
    138 		(void)signal(SIGQUIT, catchquit);
    139 
    140 	while (argc-- > 0)
    141 		(void)checkfilesys(blockcheck(*argv++), 0, 0L, 0);
    142 
    143 	if (returntosingle)
    144 		ret = 2;
    145 
    146 	exit(ret);
    147 }
    148 
    149 static int
    150 argtoi(flag, req, str, base)
    151 	int flag;
    152 	char *req, *str;
    153 	int base;
    154 {
    155 	char *cp;
    156 	int ret;
    157 
    158 	ret = (int)strtol(str, &cp, base);
    159 	if (cp == str || *cp)
    160 		errexit("-%c flag requires a %s\n", flag, req);
    161 	return (ret);
    162 }
    163 
    164 /*
    165  * Check the specified filesystem.
    166  */
    167 /* ARGSUSED */
    168 static int
    169 checkfilesys(filesys, mntpt, auxdata, child)
    170 	const char *filesys;
    171 	char *mntpt;
    172 	long auxdata;
    173 	int child;
    174 {
    175 	daddr_t n_bfree;
    176 	struct dups *dp;
    177 	struct zlncnt *zlnp;
    178 	int i;
    179 
    180 	if (preen && child)
    181 		(void)signal(SIGQUIT, voidquit);
    182 	setcdevname(filesys, preen);
    183 	if (debug && preen)
    184 		pwarn("starting\n");
    185 	switch (setup(filesys)) {
    186 	case 0:
    187 		if (preen)
    188 			pfatal("CAN'T CHECK FILE SYSTEM.");
    189 	case -1:
    190 		return (0);
    191 	}
    192 	/*
    193 	 * 1: scan inodes tallying blocks used
    194 	 */
    195 	if (preen == 0) {
    196 		if (sblock.e2fs.e2fs_rev > E2FS_REV0) {
    197 			printf("** Last Mounted on %s\n",
    198 			    sblock.e2fs.e2fs_fsmnt);
    199 		}
    200 		if (hotroot())
    201 			printf("** Root file system\n");
    202 		printf("** Phase 1 - Check Blocks and Sizes\n");
    203 	}
    204 	pass1();
    205 
    206 	/*
    207 	 * 1b: locate first references to duplicates, if any
    208 	 */
    209 	if (duplist) {
    210 		if (preen)
    211 			pfatal("INTERNAL ERROR: dups with -p");
    212 		printf("** Phase 1b - Rescan For More DUPS\n");
    213 		pass1b();
    214 	}
    215 
    216 	/*
    217 	 * 2: traverse directories from root to mark all connected directories
    218 	 */
    219 	if (preen == 0)
    220 		printf("** Phase 2 - Check Pathnames\n");
    221 	pass2();
    222 
    223 	/*
    224 	 * 3: scan inodes looking for disconnected directories
    225 	 */
    226 	if (preen == 0)
    227 		printf("** Phase 3 - Check Connectivity\n");
    228 	pass3();
    229 
    230 	/*
    231 	 * 4: scan inodes looking for disconnected files; check reference counts
    232 	 */
    233 	if (preen == 0)
    234 		printf("** Phase 4 - Check Reference Counts\n");
    235 	pass4();
    236 
    237 	/*
    238 	 * 5: check and repair resource counts in cylinder groups
    239 	 */
    240 	if (preen == 0)
    241 		printf("** Phase 5 - Check Cyl groups\n");
    242 	pass5();
    243 
    244 	/*
    245 	 * print out summary statistics
    246 	 */
    247 	n_bfree = sblock.e2fs.e2fs_fbcount;
    248 
    249 	pwarn("%d files, %d used, %d free\n",
    250 	    n_files, n_blks, n_bfree);
    251 	if (debug &&
    252 		/* 9 reserved and unused inodes in FS */
    253 	    (n_files -= maxino - 9 - sblock.e2fs.e2fs_ficount))
    254 		printf("%d files missing\n", n_files);
    255 	if (debug) {
    256 		for (i = 0; i < sblock.e2fs_ncg; i++)
    257 			n_blks +=  cgoverhead(i);
    258 		n_blks += sblock.e2fs.e2fs_first_dblock;
    259 		if (n_blks -= maxfsblock - n_bfree)
    260 			printf("%d blocks missing\n", n_blks);
    261 		if (duplist != NULL) {
    262 			printf("The following duplicate blocks remain:");
    263 			for (dp = duplist; dp; dp = dp->next)
    264 				printf(" %d,", dp->dup);
    265 			printf("\n");
    266 		}
    267 		if (zlnhead != NULL) {
    268 			printf("The following zero link count inodes remain:");
    269 			for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
    270 				printf(" %u,", zlnp->zlncnt);
    271 			printf("\n");
    272 		}
    273 	}
    274 	zlnhead = (struct zlncnt *)0;
    275 	duplist = (struct dups *)0;
    276 	muldup = (struct dups *)0;
    277 	inocleanup();
    278 	if (fsmodified) {
    279 		time_t t;
    280 		(void)time(&t);
    281 		sblock.e2fs.e2fs_wtime = t;
    282 		sblock.e2fs.e2fs_lastfsck = t;
    283 		sbdirty();
    284 	}
    285 	ckfini(1);
    286 	free(blockmap);
    287 	free(statemap);
    288 	free((char *)lncntp);
    289 	if (!fsmodified)
    290 		return (0);
    291 	if (!preen)
    292 		printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
    293 	if (rerun)
    294 		printf("\n***** PLEASE RERUN FSCK *****\n");
    295 	if (hotroot()) {
    296 		struct statfs stfs_buf;
    297 		/*
    298 		 * We modified the root.  Do a mount update on
    299 		 * it, unless it is read-write, so we can continue.
    300 		 */
    301 		if (statfs("/", &stfs_buf) == 0) {
    302 			long flags = stfs_buf.f_flags;
    303 			struct ufs_args args;
    304 			int ret;
    305 
    306 			if (flags & MNT_RDONLY) {
    307 				args.fspec = 0;
    308 				args.export.ex_flags = 0;
    309 				args.export.ex_root = 0;
    310 				flags |= MNT_UPDATE | MNT_RELOAD;
    311 				ret = mount(MOUNT_EXT2FS, "/", flags, &args);
    312 				if (ret == 0)
    313 					return(0);
    314 			}
    315 		}
    316 		if (!preen)
    317 			printf("\n***** REBOOT NOW *****\n");
    318 		sync();
    319 		return (4);
    320 	}
    321 	return (0);
    322 }
    323 
    324 static void
    325 usage()
    326 {
    327 
    328 	(void) fprintf(stderr,
    329 	    "Usage: %s [-dfnpy] [-b block] [-c level] [-m mode] filesystem ...\n",
    330 	    getprogname());
    331 	exit(1);
    332 }
    333 
    334