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main.c revision 1.30 
      1 /*	$NetBSD: main.c,v 1.30 1998/03/01 02:20:37 fvdl 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 1.30 1998/03/01 02:20:37 fvdl 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 <sys/resource.h>
     54 
     55 #include <ufs/ufs/dinode.h>
     56 #include <ufs/ufs/ufsmount.h>
     57 #include <ufs/ffs/fs.h>
     58 
     59 #include <ctype.h>
     60 #include <err.h>
     61 #include <fstab.h>
     62 #include <string.h>
     63 #include <ctype.h>
     64 #include <stdio.h>
     65 #include <stdlib.h>
     66 #include <unistd.h>
     67 
     68 #include "fsck.h"
     69 #include "extern.h"
     70 #include "fsutil.h"
     71 
     72 int	returntosingle;
     73 
     74 int	main __P((int, char *[]));
     75 
     76 static int	argtoi __P((int, char *, char *, int));
     77 static int	checkfilesys __P((char *, char *, long, int));
     78 static  void usage __P((void));
     79 
     80 
     81 int
     82 main(argc, argv)
     83 	int	argc;
     84 	char	*argv[];
     85 {
     86 	struct rlimit r;
     87 	int ch;
     88 	int ret = 0;
     89 
     90 	if (getrlimit(RLIMIT_DATA, &r) == 0) {
     91 		r.rlim_cur = r.rlim_max;
     92 		(void) setrlimit(RLIMIT_DATA, &r);
     93 	}
     94 	sync();
     95 	skipclean = 1;
     96 	while ((ch = getopt(argc, argv, "b:c:dfm:npy")) != -1) {
     97 		switch (ch) {
     98 		case 'b':
     99 			skipclean = 0;
    100 			bflag = argtoi('b', "number", optarg, 10);
    101 			printf("Alternate super block location: %d\n", bflag);
    102 			break;
    103 
    104 		case 'c':
    105 			skipclean = 0;
    106 			cvtlevel = argtoi('c', "conversion level", optarg, 10);
    107 			break;
    108 
    109 		case 'd':
    110 			debug++;
    111 			break;
    112 
    113 		case 'f':
    114 			skipclean = 0;
    115 			break;
    116 
    117 		case 'm':
    118 			lfmode = argtoi('m', "mode", optarg, 8);
    119 			if (lfmode &~ 07777)
    120 				errx(EEXIT, "bad mode to -m: %o", lfmode);
    121 			printf("** lost+found creation mode %o\n", lfmode);
    122 			break;
    123 
    124 		case 'n':
    125 			nflag++;
    126 			yflag = 0;
    127 			break;
    128 
    129 		case 'p':
    130 			preen++;
    131 			break;
    132 
    133 		case 'y':
    134 			yflag++;
    135 			nflag = 0;
    136 			break;
    137 
    138 		default:
    139 			usage();
    140 		}
    141 	}
    142 
    143 	argc -= optind;
    144 	argv += optind;
    145 
    146 	if (!argc)
    147 		usage();
    148 
    149 	if (signal(SIGINT, SIG_IGN) != SIG_IGN)
    150 		(void)signal(SIGINT, catch);
    151 	if (preen)
    152 		(void)signal(SIGQUIT, catchquit);
    153 
    154 	while (argc-- > 0)
    155 		(void)checkfilesys(blockcheck(*argv++), 0, 0L, 0);
    156 
    157 	if (returntosingle)
    158 		ret = 2;
    159 
    160 	exit(ret);
    161 }
    162 
    163 static int
    164 argtoi(flag, req, str, base)
    165 	int flag;
    166 	char *req, *str;
    167 	int base;
    168 {
    169 	char *cp;
    170 	int ret;
    171 
    172 	ret = (int)strtol(str, &cp, base);
    173 	if (cp == str || *cp)
    174 		errx(EEXIT, "-%c flag requires a %s", flag, req);
    175 	return (ret);
    176 }
    177 
    178 /*
    179  * Check the specified filesystem.
    180  */
    181 /* ARGSUSED */
    182 static int
    183 checkfilesys(filesys, mntpt, auxdata, child)
    184 	char *filesys, *mntpt;
    185 	long auxdata;
    186 	int child;
    187 {
    188 	ufs_daddr_t n_ffree, n_bfree;
    189 	struct dups *dp;
    190 	struct zlncnt *zlnp;
    191 #ifdef LITE2BORKEN
    192 	int cylno, flags;
    193 #else
    194 	int cylno;
    195 #endif
    196 
    197 	if (preen && child)
    198 		(void)signal(SIGQUIT, voidquit);
    199 	setcdevname(filesys, preen);
    200 	if (debug && preen)
    201 		pwarn("starting\n");
    202 	switch (setup(filesys)) {
    203 	case 0:
    204 		if (preen)
    205 			pfatal("CAN'T CHECK FILE SYSTEM.");
    206 		/* fall through */
    207 	case -1:
    208 		return (0);
    209 	}
    210 	/*
    211 	 * 1: scan inodes tallying blocks used
    212 	 */
    213 	if (preen == 0) {
    214 		printf("** Last Mounted on %s\n", sblock.fs_fsmnt);
    215 		if (hotroot())
    216 			printf("** Root file system\n");
    217 		printf("** Phase 1 - Check Blocks and Sizes\n");
    218 	}
    219 	pass1();
    220 
    221 	/*
    222 	 * 1b: locate first references to duplicates, if any
    223 	 */
    224 	if (duplist) {
    225 		if (preen)
    226 			pfatal("INTERNAL ERROR: dups with -p");
    227 		printf("** Phase 1b - Rescan For More DUPS\n");
    228 		pass1b();
    229 	}
    230 
    231 	/*
    232 	 * 2: traverse directories from root to mark all connected directories
    233 	 */
    234 	if (preen == 0)
    235 		printf("** Phase 2 - Check Pathnames\n");
    236 	pass2();
    237 
    238 	/*
    239 	 * 3: scan inodes looking for disconnected directories
    240 	 */
    241 	if (preen == 0)
    242 		printf("** Phase 3 - Check Connectivity\n");
    243 	pass3();
    244 
    245 	/*
    246 	 * 4: scan inodes looking for disconnected files; check reference counts
    247 	 */
    248 	if (preen == 0)
    249 		printf("** Phase 4 - Check Reference Counts\n");
    250 	pass4();
    251 
    252 	/*
    253 	 * 5: check and repair resource counts in cylinder groups
    254 	 */
    255 	if (preen == 0)
    256 		printf("** Phase 5 - Check Cyl groups\n");
    257 	pass5();
    258 
    259 	/*
    260 	 * print out summary statistics
    261 	 */
    262 	n_ffree = sblock.fs_cstotal.cs_nffree;
    263 	n_bfree = sblock.fs_cstotal.cs_nbfree;
    264 	pwarn("%d files, %d used, %d free ",
    265 	    n_files, n_blks, n_ffree + sblock.fs_frag * n_bfree);
    266 	printf("(%d frags, %d blocks, %d.%d%% fragmentation)\n",
    267 	    n_ffree, n_bfree, (n_ffree * 100) / sblock.fs_dsize,
    268 	    ((n_ffree * 1000 + sblock.fs_dsize / 2) / sblock.fs_dsize) % 10);
    269 	if (debug &&
    270 	    (n_files -= maxino - ROOTINO - sblock.fs_cstotal.cs_nifree))
    271 		printf("%d files missing\n", n_files);
    272 	if (debug) {
    273 		n_blks += sblock.fs_ncg *
    274 			(cgdmin(&sblock, 0) - cgsblock(&sblock, 0));
    275 		n_blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0);
    276 		n_blks += howmany(sblock.fs_cssize, sblock.fs_fsize);
    277 		if (n_blks -= maxfsblock - (n_ffree + sblock.fs_frag * n_bfree))
    278 			printf("%d blocks missing\n", n_blks);
    279 		if (duplist != NULL) {
    280 			printf("The following duplicate blocks remain:");
    281 			for (dp = duplist; dp; dp = dp->next)
    282 				printf(" %d,", dp->dup);
    283 			printf("\n");
    284 		}
    285 		if (zlnhead != NULL) {
    286 			printf("The following zero link count inodes remain:");
    287 			for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
    288 				printf(" %u,", zlnp->zlncnt);
    289 			printf("\n");
    290 		}
    291 	}
    292 	zlnhead = (struct zlncnt *)0;
    293 	duplist = (struct dups *)0;
    294 	muldup = (struct dups *)0;
    295 	inocleanup();
    296 	if (fsmodified) {
    297 		(void)time(&sblock.fs_time);
    298 		sbdirty();
    299 	}
    300 	if (cvtlevel && sblk.b_dirty) {
    301 		/*
    302 		 * Write out the duplicate super blocks
    303 		 */
    304 		for (cylno = 0; cylno < sblock.fs_ncg; cylno++)
    305 			bwrite(fswritefd, (char *)&sblock,
    306 			    fsbtodb(&sblock, cgsblock(&sblock, cylno)), SBSIZE);
    307 	}
    308 #if LITE2BORKEN
    309 	if (!hotroot()) {
    310 		ckfini(1);
    311 	} else {
    312 		struct statfs stfs_buf;
    313 		/*
    314 		 * Check to see if root is mounted read-write.
    315 		 */
    316 		if (statfs("/", &stfs_buf) == 0)
    317 			flags = stfs_buf.f_flags;
    318 		else
    319 			flags = 0;
    320 		ckfini(flags & MNT_RDONLY);
    321 	}
    322 #else
    323 	ckfini(1);
    324 #endif
    325 	free(blockmap);
    326 	free(statemap);
    327 	free((char *)lncntp);
    328 	if (!fsmodified)
    329 		return (0);
    330 	if (!preen)
    331 		printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
    332 	if (rerun)
    333 		printf("\n***** PLEASE RERUN FSCK *****\n");
    334 	if (hotroot()) {
    335 		struct statfs stfs_buf;
    336 		/*
    337 		 * We modified the root.  Do a mount update on
    338 		 * it, unless it is read-write, so we can continue.
    339 		 */
    340 		if (statfs("/", &stfs_buf) == 0) {
    341 			long flags = stfs_buf.f_flags;
    342 			struct ufs_args args;
    343 			int ret;
    344 
    345 			if (flags & MNT_RDONLY) {
    346 				args.fspec = 0;
    347 				args.export.ex_flags = 0;
    348 				args.export.ex_root = 0;
    349 				flags |= MNT_UPDATE | MNT_RELOAD;
    350 				ret = mount(MOUNT_FFS, "/", flags, &args);
    351 				if (ret == 0)
    352 					return(0);
    353 			}
    354 		}
    355 		if (!preen)
    356 			printf("\n***** REBOOT NOW *****\n");
    357 		sync();
    358 		return (4);
    359 	}
    360 	return (0);
    361 }
    362 
    363 static void
    364 usage()
    365 {
    366 	extern char *__progname;
    367 
    368 	(void) fprintf(stderr,
    369 	    "Usage: %s [-dfnpy] [-b block] [-c level] [-m mode] filesystem ...\n",
    370 	    __progname);
    371 	exit(1);
    372 }
    373 
    374