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main.c revision 1.9 
      1 /*	$NetBSD: main.c,v 1.9 2001/02/04 21:19:34 christos 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 1.9 2001/02/04 21:19:34 christos 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 extern char *__progname;
     78 
     79 int
     80 main(argc, argv)
     81 	int	argc;
     82 	char	*argv[];
     83 {
     84 	int ch;
     85 	int ret = 0;
     86 
     87 	sync();
     88 	skipclean = 1;
     89 	while ((ch = getopt(argc, argv, "b:c:dfm:npy")) != -1) {
     90 		switch (ch) {
     91 		case 'b':
     92 			skipclean = 0;
     93 			bflag = argtoi('b', "number", optarg, 10);
     94 			printf("Alternate super block location: %d\n", bflag);
     95 			break;
     96 
     97 		case 'd':
     98 			debug++;
     99 			break;
    100 
    101 		case 'f':
    102 			skipclean = 0;
    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 			nflag++;
    114 			yflag = 0;
    115 			break;
    116 
    117 		case 'p':
    118 			preen++;
    119 			break;
    120 
    121 		case 'y':
    122 			yflag++;
    123 			nflag = 0;
    124 			break;
    125 
    126 		default:
    127 			usage();
    128 		}
    129 	}
    130 
    131 	argc -= optind;
    132 	argv += optind;
    133 
    134 	if (!argc)
    135 		usage();
    136 
    137 	if (signal(SIGINT, SIG_IGN) != SIG_IGN)
    138 		(void)signal(SIGINT, catch);
    139 	if (preen)
    140 		(void)signal(SIGQUIT, catchquit);
    141 
    142 	while (argc-- > 0)
    143 		(void)checkfilesys(blockcheck(*argv++), 0, 0L, 0);
    144 
    145 	if (returntosingle)
    146 		ret = 2;
    147 
    148 	exit(ret);
    149 }
    150 
    151 static int
    152 argtoi(flag, req, str, base)
    153 	int flag;
    154 	char *req, *str;
    155 	int base;
    156 {
    157 	char *cp;
    158 	int ret;
    159 
    160 	ret = (int)strtol(str, &cp, base);
    161 	if (cp == str || *cp)
    162 		errexit("-%c flag requires a %s\n", flag, req);
    163 	return (ret);
    164 }
    165 
    166 /*
    167  * Check the specified filesystem.
    168  */
    169 /* ARGSUSED */
    170 static int
    171 checkfilesys(filesys, mntpt, auxdata, child)
    172 	const char *filesys;
    173 	char *mntpt;
    174 	long auxdata;
    175 	int child;
    176 {
    177 	daddr_t n_bfree;
    178 	struct dups *dp;
    179 	struct zlncnt *zlnp;
    180 	int i;
    181 
    182 	if (preen && child)
    183 		(void)signal(SIGQUIT, voidquit);
    184 	setcdevname(filesys, preen);
    185 	if (debug && preen)
    186 		pwarn("starting\n");
    187 	switch (setup(filesys)) {
    188 	case 0:
    189 		if (preen)
    190 			pfatal("CAN'T CHECK FILE SYSTEM.");
    191 	case -1:
    192 		return (0);
    193 	}
    194 	/*
    195 	 * 1: scan inodes tallying blocks used
    196 	 */
    197 	if (preen == 0) {
    198 		if (sblock.e2fs.e2fs_rev > E2FS_REV0) {
    199 			printf("** Last Mounted on %s\n",
    200 			    sblock.e2fs.e2fs_fsmnt);
    201 		}
    202 		if (hotroot())
    203 			printf("** Root file system\n");
    204 		printf("** Phase 1 - Check Blocks and Sizes\n");
    205 	}
    206 	pass1();
    207 
    208 	/*
    209 	 * 1b: locate first references to duplicates, if any
    210 	 */
    211 	if (duplist) {
    212 		if (preen)
    213 			pfatal("INTERNAL ERROR: dups with -p");
    214 		printf("** Phase 1b - Rescan For More DUPS\n");
    215 		pass1b();
    216 	}
    217 
    218 	/*
    219 	 * 2: traverse directories from root to mark all connected directories
    220 	 */
    221 	if (preen == 0)
    222 		printf("** Phase 2 - Check Pathnames\n");
    223 	pass2();
    224 
    225 	/*
    226 	 * 3: scan inodes looking for disconnected directories
    227 	 */
    228 	if (preen == 0)
    229 		printf("** Phase 3 - Check Connectivity\n");
    230 	pass3();
    231 
    232 	/*
    233 	 * 4: scan inodes looking for disconnected files; check reference counts
    234 	 */
    235 	if (preen == 0)
    236 		printf("** Phase 4 - Check Reference Counts\n");
    237 	pass4();
    238 
    239 	/*
    240 	 * 5: check and repair resource counts in cylinder groups
    241 	 */
    242 	if (preen == 0)
    243 		printf("** Phase 5 - Check Cyl groups\n");
    244 	pass5();
    245 
    246 	/*
    247 	 * print out summary statistics
    248 	 */
    249 	n_bfree = sblock.e2fs.e2fs_fbcount;
    250 
    251 	pwarn("%d files, %d used, %d free\n",
    252 	    n_files, n_blks, n_bfree);
    253 	if (debug &&
    254 		/* 9 reserved and unused inodes in FS */
    255 	    (n_files -= maxino - 9 - sblock.e2fs.e2fs_ficount))
    256 		printf("%d files missing\n", n_files);
    257 	if (debug) {
    258 		for (i = 0; i < sblock.e2fs_ncg; i++)
    259 			n_blks +=  cgoverhead(i);
    260 		n_blks += sblock.e2fs.e2fs_first_dblock;
    261 		if (n_blks -= maxfsblock - n_bfree)
    262 			printf("%d blocks missing\n", n_blks);
    263 		if (duplist != NULL) {
    264 			printf("The following duplicate blocks remain:");
    265 			for (dp = duplist; dp; dp = dp->next)
    266 				printf(" %d,", dp->dup);
    267 			printf("\n");
    268 		}
    269 		if (zlnhead != NULL) {
    270 			printf("The following zero link count inodes remain:");
    271 			for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
    272 				printf(" %u,", zlnp->zlncnt);
    273 			printf("\n");
    274 		}
    275 	}
    276 	zlnhead = (struct zlncnt *)0;
    277 	duplist = (struct dups *)0;
    278 	muldup = (struct dups *)0;
    279 	inocleanup();
    280 	if (fsmodified) {
    281 		time_t t;
    282 		(void)time(&t);
    283 		sblock.e2fs.e2fs_wtime = t;
    284 		sblock.e2fs.e2fs_lastfsck = t;
    285 		sbdirty();
    286 	}
    287 	ckfini(1);
    288 	free(blockmap);
    289 	free(statemap);
    290 	free((char *)lncntp);
    291 	if (!fsmodified)
    292 		return (0);
    293 	if (!preen)
    294 		printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
    295 	if (rerun)
    296 		printf("\n***** PLEASE RERUN FSCK *****\n");
    297 	if (hotroot()) {
    298 		struct statfs stfs_buf;
    299 		/*
    300 		 * We modified the root.  Do a mount update on
    301 		 * it, unless it is read-write, so we can continue.
    302 		 */
    303 		if (statfs("/", &stfs_buf) == 0) {
    304 			long flags = stfs_buf.f_flags;
    305 			struct ufs_args args;
    306 			int ret;
    307 
    308 			if (flags & MNT_RDONLY) {
    309 				args.fspec = 0;
    310 				args.export.ex_flags = 0;
    311 				args.export.ex_root = 0;
    312 				flags |= MNT_UPDATE | MNT_RELOAD;
    313 				ret = mount(MOUNT_EXT2FS, "/", flags, &args);
    314 				if (ret == 0)
    315 					return(0);
    316 			}
    317 		}
    318 		if (!preen)
    319 			printf("\n***** REBOOT NOW *****\n");
    320 		sync();
    321 		return (4);
    322 	}
    323 	return (0);
    324 }
    325 
    326 static void
    327 usage()
    328 {
    329 	(void) fprintf(stderr,
    330 	    "Usage: %s [-dfnpy] [-b block] [-c level] [-m mode] filesystem ...\n",
    331 	    __progname);
    332 	exit(1);
    333 }
    334 
    335