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main.c revision 1.26 
      1 /*	$NetBSD: main.c,v 1.26 1997/09/20 06:16:27 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	8.6 (Berkeley) 5/14/95";
     45 #else
     46 __RCSID("$NetBSD: main.c,v 1.26 1997/09/20 06:16:27 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 
     54 #include <ufs/ufs/dinode.h>
     55 #include <ufs/ffs/fs.h>
     56 
     57 #include <ctype.h>
     58 #include <err.h>
     59 #include <fstab.h>
     60 #include <string.h>
     61 #include <ctype.h>
     62 #include <stdio.h>
     63 #include <stdlib.h>
     64 #include <unistd.h>
     65 
     66 #include "fsck.h"
     67 #include "extern.h"
     68 #include "fsutil.h"
     69 
     70 int	returntosingle;
     71 
     72 int	main __P((int, char *[]));
     73 
     74 static int	argtoi __P((int, char *, char *, int));
     75 static int	checkfilesys __P((char *, char *, long, int));
     76 static  void usage __P((void));
     77 
     78 
     79 int
     80 main(argc, argv)
     81 	int	argc;
     82 	char	*argv[];
     83 {
     84 	int ch;
     85 	int ret = 0;
     86 	extern char *optarg;
     87 	extern int optind;
     88 
     89 	sync();
     90 	skipclean = 1;
     91 	while ((ch = getopt(argc, argv, "b:c:dfm:npy")) != -1) {
     92 		switch (ch) {
     93 		case 'b':
     94 			skipclean = 0;
     95 			bflag = argtoi('b', "number", optarg, 10);
     96 			printf("Alternate super block location: %d\n", bflag);
     97 			break;
     98 
     99 		case 'c':
    100 			skipclean = 0;
    101 			cvtlevel = argtoi('c', "conversion level", optarg, 10);
    102 			break;
    103 
    104 		case 'd':
    105 			debug++;
    106 			break;
    107 
    108 		case 'f':
    109 			skipclean = 0;
    110 			break;
    111 
    112 		case 'm':
    113 			lfmode = argtoi('m', "mode", optarg, 8);
    114 			if (lfmode &~ 07777)
    115 				errx(EEXIT, "bad mode to -m: %o", lfmode);
    116 			printf("** lost+found creation mode %o\n", lfmode);
    117 			break;
    118 
    119 		case 'n':
    120 			nflag++;
    121 			yflag = 0;
    122 			break;
    123 
    124 		case 'p':
    125 			preen++;
    126 			break;
    127 
    128 		case 'y':
    129 			yflag++;
    130 			nflag = 0;
    131 			break;
    132 
    133 		default:
    134 			usage();
    135 		}
    136 	}
    137 
    138 	argc -= optind;
    139 	argv += optind;
    140 
    141 	if (!argc)
    142 		usage();
    143 
    144 	if (signal(SIGINT, SIG_IGN) != SIG_IGN)
    145 		(void)signal(SIGINT, catch);
    146 	if (preen)
    147 		(void)signal(SIGQUIT, catchquit);
    148 
    149 	while (argc-- > 0)
    150 		(void)checkfilesys(blockcheck(*argv++), 0, 0L, 0);
    151 
    152 	if (returntosingle)
    153 		ret = 2;
    154 
    155 	exit(ret);
    156 }
    157 
    158 static int
    159 argtoi(flag, req, str, base)
    160 	int flag;
    161 	char *req, *str;
    162 	int base;
    163 {
    164 	char *cp;
    165 	int ret;
    166 
    167 	ret = (int)strtol(str, &cp, base);
    168 	if (cp == str || *cp)
    169 		errx(EEXIT, "-%c flag requires a %s", flag, req);
    170 	return (ret);
    171 }
    172 
    173 /*
    174  * Check the specified filesystem.
    175  */
    176 /* ARGSUSED */
    177 static int
    178 checkfilesys(filesys, mntpt, auxdata, child)
    179 	char *filesys, *mntpt;
    180 	long auxdata;
    181 	int child;
    182 {
    183 	ufs_daddr_t n_ffree, n_bfree;
    184 	struct dups *dp;
    185 	struct zlncnt *zlnp;
    186 	int cylno, flags;
    187 
    188 	if (preen && child)
    189 		(void)signal(SIGQUIT, voidquit);
    190 	setcdevname(filesys, preen);
    191 	if (debug && preen)
    192 		pwarn("starting\n");
    193 	switch (setup(filesys)) {
    194 	case 0:
    195 		if (preen)
    196 			pfatal("CAN'T CHECK FILE SYSTEM.");
    197 		/* fall through */
    198 	case -1:
    199 		return (0);
    200 	}
    201 	/*
    202 	 * 1: scan inodes tallying blocks used
    203 	 */
    204 	if (preen == 0) {
    205 		printf("** Last Mounted on %s\n", sblock.fs_fsmnt);
    206 		if (hotroot())
    207 			printf("** Root file system\n");
    208 		printf("** Phase 1 - Check Blocks and Sizes\n");
    209 	}
    210 	pass1();
    211 
    212 	/*
    213 	 * 1b: locate first references to duplicates, if any
    214 	 */
    215 	if (duplist) {
    216 		if (preen)
    217 			pfatal("INTERNAL ERROR: dups with -p");
    218 		printf("** Phase 1b - Rescan For More DUPS\n");
    219 		pass1b();
    220 	}
    221 
    222 	/*
    223 	 * 2: traverse directories from root to mark all connected directories
    224 	 */
    225 	if (preen == 0)
    226 		printf("** Phase 2 - Check Pathnames\n");
    227 	pass2();
    228 
    229 	/*
    230 	 * 3: scan inodes looking for disconnected directories
    231 	 */
    232 	if (preen == 0)
    233 		printf("** Phase 3 - Check Connectivity\n");
    234 	pass3();
    235 
    236 	/*
    237 	 * 4: scan inodes looking for disconnected files; check reference counts
    238 	 */
    239 	if (preen == 0)
    240 		printf("** Phase 4 - Check Reference Counts\n");
    241 	pass4();
    242 
    243 	/*
    244 	 * 5: check and repair resource counts in cylinder groups
    245 	 */
    246 	if (preen == 0)
    247 		printf("** Phase 5 - Check Cyl groups\n");
    248 	pass5();
    249 
    250 	/*
    251 	 * print out summary statistics
    252 	 */
    253 	n_ffree = sblock.fs_cstotal.cs_nffree;
    254 	n_bfree = sblock.fs_cstotal.cs_nbfree;
    255 	pwarn("%d files, %d used, %d free ",
    256 	    n_files, n_blks, n_ffree + sblock.fs_frag * n_bfree);
    257 	printf("(%d frags, %d blocks, %d.%d%% fragmentation)\n",
    258 	    n_ffree, n_bfree, (n_ffree * 100) / sblock.fs_dsize,
    259 	    ((n_ffree * 1000 + sblock.fs_dsize / 2) / sblock.fs_dsize) % 10);
    260 	if (debug &&
    261 	    (n_files -= maxino - ROOTINO - sblock.fs_cstotal.cs_nifree))
    262 		printf("%d files missing\n", n_files);
    263 	if (debug) {
    264 		n_blks += sblock.fs_ncg *
    265 			(cgdmin(&sblock, 0) - cgsblock(&sblock, 0));
    266 		n_blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0);
    267 		n_blks += howmany(sblock.fs_cssize, sblock.fs_fsize);
    268 		if (n_blks -= maxfsblock - (n_ffree + sblock.fs_frag * n_bfree))
    269 			printf("%d blocks missing\n", n_blks);
    270 		if (duplist != NULL) {
    271 			printf("The following duplicate blocks remain:");
    272 			for (dp = duplist; dp; dp = dp->next)
    273 				printf(" %d,", dp->dup);
    274 			printf("\n");
    275 		}
    276 		if (zlnhead != NULL) {
    277 			printf("The following zero link count inodes remain:");
    278 			for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
    279 				printf(" %u,", zlnp->zlncnt);
    280 			printf("\n");
    281 		}
    282 	}
    283 	zlnhead = (struct zlncnt *)0;
    284 	duplist = (struct dups *)0;
    285 	muldup = (struct dups *)0;
    286 	inocleanup();
    287 	if (fsmodified) {
    288 		(void)time(&sblock.fs_time);
    289 		sbdirty();
    290 	}
    291 	if (cvtlevel && sblk.b_dirty) {
    292 		/*
    293 		 * Write out the duplicate super blocks
    294 		 */
    295 		for (cylno = 0; cylno < sblock.fs_ncg; cylno++)
    296 			bwrite(fswritefd, (char *)&sblock,
    297 			    fsbtodb(&sblock, cgsblock(&sblock, cylno)), SBSIZE);
    298 	}
    299 	if (!hotroot()) {
    300 		ckfini(1);
    301 	} else {
    302 		struct statfs stfs_buf;
    303 		/*
    304 		 * Check to see if root is mounted read-write.
    305 		 */
    306 		if (statfs("/", &stfs_buf) == 0)
    307 			flags = stfs_buf.f_flags;
    308 		else
    309 			flags = 0;
    310 		ckfini(flags & MNT_RDONLY);
    311 	}
    312 	free(blockmap);
    313 	free(statemap);
    314 	free((char *)lncntp);
    315 	if (!fsmodified)
    316 		return (0);
    317 	if (!preen)
    318 		printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
    319 	if (rerun)
    320 		printf("\n***** PLEASE RERUN FSCK *****\n");
    321 	if (hotroot()) {
    322 		struct statfs stfs_buf;
    323 		/*
    324 		 * We modified the root.  Do a mount update on
    325 		 * it, unless it is read-write, so we can continue.
    326 		 */
    327 		if (statfs("/", &stfs_buf) == 0) {
    328 			long flags = stfs_buf.f_flags;
    329 			struct ufs_args args;
    330 			int ret;
    331 
    332 			if (flags & MNT_RDONLY) {
    333 				args.fspec = 0;
    334 				args.export.ex_flags = 0;
    335 				args.export.ex_root = 0;
    336 				flags |= MNT_UPDATE | MNT_RELOAD;
    337 				ret = mount(MOUNT_FFS, "/", flags, &args);
    338 				if (ret == 0)
    339 					return(0);
    340 			}
    341 		}
    342 		if (!preen)
    343 			printf("\n***** REBOOT NOW *****\n");
    344 		sync();
    345 		return (4);
    346 	}
    347 	return (0);
    348 }
    349 
    350 static void
    351 usage()
    352 {
    353 	extern char *__progname;
    354 
    355 	(void) fprintf(stderr,
    356 	    "Usage: %s [-dfnpy] [-b block] [-c level] [-m mode] filesystem ...\n",
    357 	    __progname);
    358 	exit(1);
    359 }
    360 
    361