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main.c revision 1.28 
      1 /*	$NetBSD: main.c,v 1.28 1997/10/01 02:17:06 enami 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 1.28 1997/10/01 02:17:06 enami 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 
     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 'c':
     98 			skipclean = 0;
     99 			cvtlevel = argtoi('c', "conversion level", optarg, 10);
    100 			break;
    101 
    102 		case 'd':
    103 			debug++;
    104 			break;
    105 
    106 		case 'f':
    107 			skipclean = 0;
    108 			break;
    109 
    110 		case 'm':
    111 			lfmode = argtoi('m', "mode", optarg, 8);
    112 			if (lfmode &~ 07777)
    113 				errx(EEXIT, "bad mode to -m: %o", lfmode);
    114 			printf("** lost+found creation mode %o\n", lfmode);
    115 			break;
    116 
    117 		case 'n':
    118 			nflag++;
    119 			yflag = 0;
    120 			break;
    121 
    122 		case 'p':
    123 			preen++;
    124 			break;
    125 
    126 		case 'y':
    127 			yflag++;
    128 			nflag = 0;
    129 			break;
    130 
    131 		default:
    132 			usage();
    133 		}
    134 	}
    135 
    136 	argc -= optind;
    137 	argv += optind;
    138 
    139 	if (!argc)
    140 		usage();
    141 
    142 	if (signal(SIGINT, SIG_IGN) != SIG_IGN)
    143 		(void)signal(SIGINT, catch);
    144 	if (preen)
    145 		(void)signal(SIGQUIT, catchquit);
    146 
    147 	while (argc-- > 0)
    148 		(void)checkfilesys(blockcheck(*argv++), 0, 0L, 0);
    149 
    150 	if (returntosingle)
    151 		ret = 2;
    152 
    153 	exit(ret);
    154 }
    155 
    156 static int
    157 argtoi(flag, req, str, base)
    158 	int flag;
    159 	char *req, *str;
    160 	int base;
    161 {
    162 	char *cp;
    163 	int ret;
    164 
    165 	ret = (int)strtol(str, &cp, base);
    166 	if (cp == str || *cp)
    167 		errx(EEXIT, "-%c flag requires a %s", flag, req);
    168 	return (ret);
    169 }
    170 
    171 /*
    172  * Check the specified filesystem.
    173  */
    174 /* ARGSUSED */
    175 static int
    176 checkfilesys(filesys, mntpt, auxdata, child)
    177 	char *filesys, *mntpt;
    178 	long auxdata;
    179 	int child;
    180 {
    181 	ufs_daddr_t n_ffree, n_bfree;
    182 	struct dups *dp;
    183 	struct zlncnt *zlnp;
    184 #ifdef LITE2BORKEN
    185 	int cylno, flags;
    186 #else
    187 	int cylno;
    188 #endif
    189 
    190 	if (preen && child)
    191 		(void)signal(SIGQUIT, voidquit);
    192 	setcdevname(filesys, preen);
    193 	if (debug && preen)
    194 		pwarn("starting\n");
    195 	switch (setup(filesys)) {
    196 	case 0:
    197 		if (preen)
    198 			pfatal("CAN'T CHECK FILE SYSTEM.");
    199 		/* fall through */
    200 	case -1:
    201 		return (0);
    202 	}
    203 	/*
    204 	 * 1: scan inodes tallying blocks used
    205 	 */
    206 	if (preen == 0) {
    207 		printf("** Last Mounted on %s\n", sblock.fs_fsmnt);
    208 		if (hotroot())
    209 			printf("** Root file system\n");
    210 		printf("** Phase 1 - Check Blocks and Sizes\n");
    211 	}
    212 	pass1();
    213 
    214 	/*
    215 	 * 1b: locate first references to duplicates, if any
    216 	 */
    217 	if (duplist) {
    218 		if (preen)
    219 			pfatal("INTERNAL ERROR: dups with -p");
    220 		printf("** Phase 1b - Rescan For More DUPS\n");
    221 		pass1b();
    222 	}
    223 
    224 	/*
    225 	 * 2: traverse directories from root to mark all connected directories
    226 	 */
    227 	if (preen == 0)
    228 		printf("** Phase 2 - Check Pathnames\n");
    229 	pass2();
    230 
    231 	/*
    232 	 * 3: scan inodes looking for disconnected directories
    233 	 */
    234 	if (preen == 0)
    235 		printf("** Phase 3 - Check Connectivity\n");
    236 	pass3();
    237 
    238 	/*
    239 	 * 4: scan inodes looking for disconnected files; check reference counts
    240 	 */
    241 	if (preen == 0)
    242 		printf("** Phase 4 - Check Reference Counts\n");
    243 	pass4();
    244 
    245 	/*
    246 	 * 5: check and repair resource counts in cylinder groups
    247 	 */
    248 	if (preen == 0)
    249 		printf("** Phase 5 - Check Cyl groups\n");
    250 	pass5();
    251 
    252 	/*
    253 	 * print out summary statistics
    254 	 */
    255 	n_ffree = sblock.fs_cstotal.cs_nffree;
    256 	n_bfree = sblock.fs_cstotal.cs_nbfree;
    257 	pwarn("%d files, %d used, %d free ",
    258 	    n_files, n_blks, n_ffree + sblock.fs_frag * n_bfree);
    259 	printf("(%d frags, %d blocks, %d.%d%% fragmentation)\n",
    260 	    n_ffree, n_bfree, (n_ffree * 100) / sblock.fs_dsize,
    261 	    ((n_ffree * 1000 + sblock.fs_dsize / 2) / sblock.fs_dsize) % 10);
    262 	if (debug &&
    263 	    (n_files -= maxino - ROOTINO - sblock.fs_cstotal.cs_nifree))
    264 		printf("%d files missing\n", n_files);
    265 	if (debug) {
    266 		n_blks += sblock.fs_ncg *
    267 			(cgdmin(&sblock, 0) - cgsblock(&sblock, 0));
    268 		n_blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0);
    269 		n_blks += howmany(sblock.fs_cssize, sblock.fs_fsize);
    270 		if (n_blks -= maxfsblock - (n_ffree + sblock.fs_frag * n_bfree))
    271 			printf("%d blocks missing\n", n_blks);
    272 		if (duplist != NULL) {
    273 			printf("The following duplicate blocks remain:");
    274 			for (dp = duplist; dp; dp = dp->next)
    275 				printf(" %d,", dp->dup);
    276 			printf("\n");
    277 		}
    278 		if (zlnhead != NULL) {
    279 			printf("The following zero link count inodes remain:");
    280 			for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
    281 				printf(" %u,", zlnp->zlncnt);
    282 			printf("\n");
    283 		}
    284 	}
    285 	zlnhead = (struct zlncnt *)0;
    286 	duplist = (struct dups *)0;
    287 	muldup = (struct dups *)0;
    288 	inocleanup();
    289 	if (fsmodified) {
    290 		(void)time(&sblock.fs_time);
    291 		sbdirty();
    292 	}
    293 	if (cvtlevel && sblk.b_dirty) {
    294 		/*
    295 		 * Write out the duplicate super blocks
    296 		 */
    297 		for (cylno = 0; cylno < sblock.fs_ncg; cylno++)
    298 			bwrite(fswritefd, (char *)&sblock,
    299 			    fsbtodb(&sblock, cgsblock(&sblock, cylno)), SBSIZE);
    300 	}
    301 #if LITE2BORKEN
    302 	if (!hotroot()) {
    303 		ckfini(1);
    304 	} else {
    305 		struct statfs stfs_buf;
    306 		/*
    307 		 * Check to see if root is mounted read-write.
    308 		 */
    309 		if (statfs("/", &stfs_buf) == 0)
    310 			flags = stfs_buf.f_flags;
    311 		else
    312 			flags = 0;
    313 		ckfini(flags & MNT_RDONLY);
    314 	}
    315 #else
    316 	ckfini(1);
    317 #endif
    318 	free(blockmap);
    319 	free(statemap);
    320 	free((char *)lncntp);
    321 	if (!fsmodified)
    322 		return (0);
    323 	if (!preen)
    324 		printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
    325 	if (rerun)
    326 		printf("\n***** PLEASE RERUN FSCK *****\n");
    327 	if (hotroot()) {
    328 		struct statfs stfs_buf;
    329 		/*
    330 		 * We modified the root.  Do a mount update on
    331 		 * it, unless it is read-write, so we can continue.
    332 		 */
    333 		if (statfs("/", &stfs_buf) == 0) {
    334 			long flags = stfs_buf.f_flags;
    335 			struct ufs_args args;
    336 			int ret;
    337 
    338 			if (flags & MNT_RDONLY) {
    339 				args.fspec = 0;
    340 				args.export.ex_flags = 0;
    341 				args.export.ex_root = 0;
    342 				flags |= MNT_UPDATE | MNT_RELOAD;
    343 				ret = mount(MOUNT_FFS, "/", flags, &args);
    344 				if (ret == 0)
    345 					return(0);
    346 			}
    347 		}
    348 		if (!preen)
    349 			printf("\n***** REBOOT NOW *****\n");
    350 		sync();
    351 		return (4);
    352 	}
    353 	return (0);
    354 }
    355 
    356 static void
    357 usage()
    358 {
    359 	extern char *__progname;
    360 
    361 	(void) fprintf(stderr,
    362 	    "Usage: %s [-dfnpy] [-b block] [-c level] [-m mode] filesystem ...\n",
    363 	    __progname);
    364 	exit(1);
    365 }
    366 
    367