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main.c revision 1.3 
      1 /*	$NetBSD: main.c,v 1.3 1997/10/01 02:15:48 enami 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 1.3 1997/10/01 02:15:48 enami 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/ext2fs/ext2fs_dinode.h>
     55 #include <ufs/ext2fs/ext2fs.h>
     56 #include <fstab.h>
     57 #include <stdlib.h>
     58 #include <string.h>
     59 #include <ctype.h>
     60 #include <stdio.h>
     61 #include <unistd.h>
     62 
     63 #include "fsck.h"
     64 #include "extern.h"
     65 #include "fsutil.h"
     66 
     67 int	returntosingle;
     68 
     69 int	main __P((int, char *[]));
     70 
     71 static int	argtoi __P((int, char *, char *, int));
     72 static int	checkfilesys __P((char *, char *, long, int));
     73 static  void usage __P((void));
     74 
     75 
     76 int
     77 main(argc, argv)
     78 	int	argc;
     79 	char	*argv[];
     80 {
     81 	int ch;
     82 	int ret = 0;
     83 
     84 	sync();
     85 	skipclean = 1;
     86 	while ((ch = getopt(argc, argv, "b:c:dfm:npy")) != -1) {
     87 		switch (ch) {
     88 		case 'b':
     89 			skipclean = 0;
     90 			bflag = argtoi('b', "number", optarg, 10);
     91 			printf("Alternate super block location: %d\n", bflag);
     92 			break;
     93 
     94 		case 'd':
     95 			debug++;
     96 			break;
     97 
     98 		case 'f':
     99 			skipclean = 0;
    100 			break;
    101 
    102 		case 'm':
    103 			lfmode = argtoi('m', "mode", optarg, 8);
    104 			if (lfmode &~ 07777)
    105 				errexit("bad mode to -m: %o\n", lfmode);
    106 			printf("** lost+found creation mode %o\n", lfmode);
    107 			break;
    108 
    109 		case 'n':
    110 			nflag++;
    111 			yflag = 0;
    112 			break;
    113 
    114 		case 'p':
    115 			preen++;
    116 			break;
    117 
    118 		case 'y':
    119 			yflag++;
    120 			nflag = 0;
    121 			break;
    122 
    123 		default:
    124 			usage();
    125 		}
    126 	}
    127 
    128 	argc -= optind;
    129 	argv += optind;
    130 
    131 	if (!argc)
    132 		usage();
    133 
    134 	if (signal(SIGINT, SIG_IGN) != SIG_IGN)
    135 		(void)signal(SIGINT, catch);
    136 	if (preen)
    137 		(void)signal(SIGQUIT, catchquit);
    138 
    139 	while (argc-- > 0)
    140 		(void)checkfilesys(blockcheck(*argv++), 0, 0L, 0);
    141 
    142 	if (returntosingle)
    143 		ret = 2;
    144 
    145 	exit(ret);
    146 }
    147 
    148 static int
    149 argtoi(flag, req, str, base)
    150 	int flag;
    151 	char *req, *str;
    152 	int base;
    153 {
    154 	char *cp;
    155 	int ret;
    156 
    157 	ret = (int)strtol(str, &cp, base);
    158 	if (cp == str || *cp)
    159 		errexit("-%c flag requires a %s\n", flag, req);
    160 	return (ret);
    161 }
    162 
    163 /*
    164  * Check the specified filesystem.
    165  */
    166 /* ARGSUSED */
    167 static int
    168 checkfilesys(filesys, mntpt, auxdata, child)
    169 	char *filesys, *mntpt;
    170 	long auxdata;
    171 	int child;
    172 {
    173 	daddr_t n_bfree;
    174 	struct dups *dp;
    175 	struct zlncnt *zlnp;
    176 
    177 	if (preen && child)
    178 		(void)signal(SIGQUIT, voidquit);
    179 	setcdevname(filesys, preen);
    180 	if (debug && preen)
    181 		pwarn("starting\n");
    182 	switch (setup(filesys)) {
    183 	case 0:
    184 		if (preen)
    185 			pfatal("CAN'T CHECK FILE SYSTEM.");
    186 	case -1:
    187 		return (0);
    188 	}
    189 	/*
    190 	 * 1: scan inodes tallying blocks used
    191 	 */
    192 	if (preen == 0) {
    193 		if (hotroot())
    194 			printf("** Root file system\n");
    195 		printf("** Phase 1 - Check Blocks and Sizes\n");
    196 	}
    197 	pass1();
    198 
    199 	/*
    200 	 * 1b: locate first references to duplicates, if any
    201 	 */
    202 	if (duplist) {
    203 		if (preen)
    204 			pfatal("INTERNAL ERROR: dups with -p");
    205 		printf("** Phase 1b - Rescan For More DUPS\n");
    206 		pass1b();
    207 	}
    208 
    209 	/*
    210 	 * 2: traverse directories from root to mark all connected directories
    211 	 */
    212 	if (preen == 0)
    213 		printf("** Phase 2 - Check Pathnames\n");
    214 	pass2();
    215 
    216 	/*
    217 	 * 3: scan inodes looking for disconnected directories
    218 	 */
    219 	if (preen == 0)
    220 		printf("** Phase 3 - Check Connectivity\n");
    221 	pass3();
    222 
    223 	/*
    224 	 * 4: scan inodes looking for disconnected files; check reference counts
    225 	 */
    226 	if (preen == 0)
    227 		printf("** Phase 4 - Check Reference Counts\n");
    228 	pass4();
    229 
    230 	/*
    231 	 * 5: check and repair resource counts in cylinder groups
    232 	 */
    233 	if (preen == 0)
    234 		printf("** Phase 5 - Check Cyl groups\n");
    235 	pass5();
    236 
    237 	/*
    238 	 * print out summary statistics
    239 	 */
    240 	n_bfree = sblock.e2fs.e2fs_fbcount;
    241 
    242 	pwarn("%d files, %d used, %d free\n",
    243 	    n_files, n_blks, n_bfree);
    244 	if (debug &&
    245 		/* 9 reserved and unused inodes in FS */
    246 	    (n_files -= maxino - 9 - sblock.e2fs.e2fs_ficount))
    247 		printf("%d files missing\n", n_files);
    248 	if (debug) {
    249 		n_blks += sblock.e2fs_ncg * cgoverhead;
    250 		n_blks += sblock.e2fs.e2fs_first_dblock;
    251 		if (n_blks -= maxfsblock - n_bfree)
    252 			printf("%d blocks missing\n", n_blks);
    253 		if (duplist != NULL) {
    254 			printf("The following duplicate blocks remain:");
    255 			for (dp = duplist; dp; dp = dp->next)
    256 				printf(" %d,", dp->dup);
    257 			printf("\n");
    258 		}
    259 		if (zlnhead != NULL) {
    260 			printf("The following zero link count inodes remain:");
    261 			for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
    262 				printf(" %u,", zlnp->zlncnt);
    263 			printf("\n");
    264 		}
    265 	}
    266 	zlnhead = (struct zlncnt *)0;
    267 	duplist = (struct dups *)0;
    268 	muldup = (struct dups *)0;
    269 	inocleanup();
    270 	if (fsmodified) {
    271 		time_t t;
    272 		(void)time(&t);
    273 		sblock.e2fs.e2fs_wtime = t;
    274 		sblock.e2fs.e2fs_lastfsck = t;
    275 		sbdirty();
    276 	}
    277 	ckfini(1);
    278 	free(blockmap);
    279 	free(statemap);
    280 	free((char *)lncntp);
    281 	if (!fsmodified)
    282 		return (0);
    283 	if (!preen)
    284 		printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
    285 	if (rerun)
    286 		printf("\n***** PLEASE RERUN FSCK *****\n");
    287 	if (hotroot()) {
    288 		struct statfs stfs_buf;
    289 		/*
    290 		 * We modified the root.  Do a mount update on
    291 		 * it, unless it is read-write, so we can continue.
    292 		 */
    293 		if (statfs("/", &stfs_buf) == 0) {
    294 			long flags = stfs_buf.f_flags;
    295 			struct ufs_args args;
    296 			int ret;
    297 
    298 			if (flags & MNT_RDONLY) {
    299 				args.fspec = 0;
    300 				args.export.ex_flags = 0;
    301 				args.export.ex_root = 0;
    302 				flags |= MNT_UPDATE | MNT_RELOAD;
    303 				ret = mount(MOUNT_EXT2FS, "/", flags, &args);
    304 				if (ret == 0)
    305 					return(0);
    306 			}
    307 		}
    308 		if (!preen)
    309 			printf("\n***** REBOOT NOW *****\n");
    310 		sync();
    311 		return (4);
    312 	}
    313 	return (0);
    314 }
    315 
    316 static void
    317 usage()
    318 {
    319 	extern char *__progname;
    320 
    321 	(void) fprintf(stderr,
    322 	    "Usage: %s [-dfnpy] [-b block] [-c level] [-m mode] filesystem ...\n",
    323 	    __progname);
    324 	exit(1);
    325 }
    326 
    327