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main.c revision 1.24 
      1 /*	$NetBSD: main.c,v 1.24 1997/09/14 14:36:32 lukem 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 #include <sys/cdefs.h>
     37 #ifndef lint
     38 __COPYRIGHT("@(#) 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 __RCSID("$NetBSD: main.c,v 1.24 1997/09/14 14:36:32 lukem 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 #include "fsutil.h"
     65 
     66 int	returntosingle;
     67 
     68 int	main __P((int, char *[]));
     69 
     70 static int	argtoi __P((int, char *, char *, int));
     71 static int	checkfilesys __P((char *, char *, long, int));
     72 static  void usage __P((void));
     73 
     74 
     75 int
     76 main(argc, argv)
     77 	int	argc;
     78 	char	*argv[];
     79 {
     80 	int ch;
     81 	int ret = 0;
     82 	extern char *optarg;
     83 	extern int optind;
     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 '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 'm':
    109 			lfmode = argtoi('m', "mode", optarg, 8);
    110 			if (lfmode &~ 07777)
    111 				errexit("bad mode to -m: %o\n", lfmode);
    112 			printf("** lost+found creation mode %o\n", lfmode);
    113 			break;
    114 
    115 		case 'n':
    116 			nflag++;
    117 			yflag = 0;
    118 			break;
    119 
    120 		case 'p':
    121 			preen++;
    122 			break;
    123 
    124 		case 'y':
    125 			yflag++;
    126 			nflag = 0;
    127 			break;
    128 
    129 		default:
    130 			usage();
    131 		}
    132 	}
    133 
    134 	argc -= optind;
    135 	argv += optind;
    136 
    137 	if (!argc)
    138 		usage();
    139 
    140 	if (signal(SIGINT, SIG_IGN) != SIG_IGN)
    141 		(void)signal(SIGINT, catch);
    142 	if (preen)
    143 		(void)signal(SIGQUIT, catchquit);
    144 
    145 	while (argc-- > 0)
    146 		(void)checkfilesys(blockcheck(*argv++), 0, 0L, 0);
    147 
    148 	if (returntosingle)
    149 		ret = 2;
    150 
    151 	exit(ret);
    152 }
    153 
    154 static int
    155 argtoi(flag, req, str, base)
    156 	int flag;
    157 	char *req, *str;
    158 	int base;
    159 {
    160 	char *cp;
    161 	int ret;
    162 
    163 	ret = (int)strtol(str, &cp, base);
    164 	if (cp == str || *cp)
    165 		errexit("-%c flag requires a %s\n", flag, req);
    166 	return (ret);
    167 }
    168 
    169 /*
    170  * Check the specified filesystem.
    171  */
    172 /* ARGSUSED */
    173 static int
    174 checkfilesys(filesys, mntpt, auxdata, child)
    175 	char *filesys, *mntpt;
    176 	long auxdata;
    177 	int child;
    178 {
    179 	daddr_t n_ffree, n_bfree;
    180 	struct dups *dp;
    181 	struct zlncnt *zlnp;
    182 	int cylno;
    183 
    184 	if (preen && child)
    185 		(void)signal(SIGQUIT, voidquit);
    186 	setcdevname(filesys, preen);
    187 	if (debug && preen)
    188 		pwarn("starting\n");
    189 	switch (setup(filesys)) {
    190 	case 0:
    191 		if (preen)
    192 			pfatal("CAN'T CHECK FILE SYSTEM.");
    193 	case -1:
    194 		return (0);
    195 	}
    196 	/*
    197 	 * 1: scan inodes tallying blocks used
    198 	 */
    199 	if (preen == 0) {
    200 		printf("** Last Mounted on %s\n", sblock.fs_fsmnt);
    201 		if (hotroot())
    202 			printf("** Root file system\n");
    203 		printf("** Phase 1 - Check Blocks and Sizes\n");
    204 	}
    205 	pass1();
    206 
    207 	/*
    208 	 * 1b: locate first references to duplicates, if any
    209 	 */
    210 	if (duplist) {
    211 		if (preen)
    212 			pfatal("INTERNAL ERROR: dups with -p");
    213 		printf("** Phase 1b - Rescan For More DUPS\n");
    214 		pass1b();
    215 	}
    216 
    217 	/*
    218 	 * 2: traverse directories from root to mark all connected directories
    219 	 */
    220 	if (preen == 0)
    221 		printf("** Phase 2 - Check Pathnames\n");
    222 	pass2();
    223 
    224 	/*
    225 	 * 3: scan inodes looking for disconnected directories
    226 	 */
    227 	if (preen == 0)
    228 		printf("** Phase 3 - Check Connectivity\n");
    229 	pass3();
    230 
    231 	/*
    232 	 * 4: scan inodes looking for disconnected files; check reference counts
    233 	 */
    234 	if (preen == 0)
    235 		printf("** Phase 4 - Check Reference Counts\n");
    236 	pass4();
    237 
    238 	/*
    239 	 * 5: check and repair resource counts in cylinder groups
    240 	 */
    241 	if (preen == 0)
    242 		printf("** Phase 5 - Check Cyl groups\n");
    243 	pass5();
    244 
    245 	/*
    246 	 * print out summary statistics
    247 	 */
    248 	n_ffree = sblock.fs_cstotal.cs_nffree;
    249 	n_bfree = sblock.fs_cstotal.cs_nbfree;
    250 	pwarn("%d files, %d used, %d free ",
    251 	    n_files, n_blks, n_ffree + sblock.fs_frag * n_bfree);
    252 	printf("(%d frags, %d blocks, %d.%d%% fragmentation)\n",
    253 	    n_ffree, n_bfree, (n_ffree * 100) / sblock.fs_dsize,
    254 	    ((n_ffree * 1000 + sblock.fs_dsize / 2) / sblock.fs_dsize) % 10);
    255 	if (debug &&
    256 	    (n_files -= maxino - ROOTINO - sblock.fs_cstotal.cs_nifree))
    257 		printf("%d files missing\n", n_files);
    258 	if (debug) {
    259 		n_blks += sblock.fs_ncg *
    260 			(cgdmin(&sblock, 0) - cgsblock(&sblock, 0));
    261 		n_blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0);
    262 		n_blks += howmany(sblock.fs_cssize, sblock.fs_fsize);
    263 		if (n_blks -= maxfsblock - (n_ffree + sblock.fs_frag * n_bfree))
    264 			printf("%d blocks missing\n", n_blks);
    265 		if (duplist != NULL) {
    266 			printf("The following duplicate blocks remain:");
    267 			for (dp = duplist; dp; dp = dp->next)
    268 				printf(" %d,", dp->dup);
    269 			printf("\n");
    270 		}
    271 		if (zlnhead != NULL) {
    272 			printf("The following zero link count inodes remain:");
    273 			for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
    274 				printf(" %u,", zlnp->zlncnt);
    275 			printf("\n");
    276 		}
    277 	}
    278 	zlnhead = (struct zlncnt *)0;
    279 	duplist = (struct dups *)0;
    280 	muldup = (struct dups *)0;
    281 	inocleanup();
    282 	if (fsmodified) {
    283 		(void)time(&sblock.fs_time);
    284 		sbdirty();
    285 	}
    286 	if (cvtlevel && sblk.b_dirty) {
    287 		/*
    288 		 * Write out the duplicate super blocks
    289 		 */
    290 		for (cylno = 0; cylno < sblock.fs_ncg; cylno++)
    291 			bwrite(fswritefd, (char *)&sblock,
    292 			    fsbtodb(&sblock, cgsblock(&sblock, cylno)), SBSIZE);
    293 	}
    294 	ckfini(1);
    295 	free(blockmap);
    296 	free(statemap);
    297 	free((char *)lncntp);
    298 	if (!fsmodified)
    299 		return (0);
    300 	if (!preen)
    301 		printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
    302 	if (rerun)
    303 		printf("\n***** PLEASE RERUN FSCK *****\n");
    304 	if (hotroot()) {
    305 		struct statfs stfs_buf;
    306 		/*
    307 		 * We modified the root.  Do a mount update on
    308 		 * it, unless it is read-write, so we can continue.
    309 		 */
    310 		if (statfs("/", &stfs_buf) == 0) {
    311 			long flags = stfs_buf.f_flags;
    312 			struct ufs_args args;
    313 			int ret;
    314 
    315 			if (flags & MNT_RDONLY) {
    316 				args.fspec = 0;
    317 				args.export.ex_flags = 0;
    318 				args.export.ex_root = 0;
    319 				flags |= MNT_UPDATE | MNT_RELOAD;
    320 				ret = mount(MOUNT_FFS, "/", flags, &args);
    321 				if (ret == 0)
    322 					return(0);
    323 			}
    324 		}
    325 		if (!preen)
    326 			printf("\n***** REBOOT NOW *****\n");
    327 		sync();
    328 		return (4);
    329 	}
    330 	return (0);
    331 }
    332 
    333 static void
    334 usage()
    335 {
    336 	extern char *__progname;
    337 
    338 	(void) fprintf(stderr,
    339 	    "Usage: %s [-dfnpy] [-b block] [-c level] [-m mode] filesystem ...\n",
    340 	    __progname);
    341 	exit(1);
    342 }
    343 
    344