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main.c revision 1.29 
      1 /*	$NetBSD: main.c,v 1.29 1997/11/02 01:42:44 mjacob 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 1.29 1997/11/02 01:42:44 mjacob 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/ffs/fs.h>
     57 
     58 #include <ctype.h>
     59 #include <err.h>
     60 #include <fstab.h>
     61 #include <string.h>
     62 #include <ctype.h>
     63 #include <stdio.h>
     64 #include <stdlib.h>
     65 #include <unistd.h>
     66 
     67 #include "fsck.h"
     68 #include "extern.h"
     69 #include "fsutil.h"
     70 
     71 int	returntosingle;
     72 
     73 int	main __P((int, char *[]));
     74 
     75 static int	argtoi __P((int, char *, char *, int));
     76 static int	checkfilesys __P((char *, char *, long, int));
     77 static  void usage __P((void));
     78 
     79 
     80 int
     81 main(argc, argv)
     82 	int	argc;
     83 	char	*argv[];
     84 {
     85 	struct rlimit r;
     86 	int ch;
     87 	int ret = 0;
     88 
     89 	if (getrlimit(RLIMIT_DATA, &r) == 0) {
     90 		r.rlim_cur = r.rlim_max;
     91 		(void) setrlimit(RLIMIT_DATA, &r);
     92 	}
     93 	sync();
     94 	skipclean = 1;
     95 	while ((ch = getopt(argc, argv, "b:c:dfm:npy")) != -1) {
     96 		switch (ch) {
     97 		case 'b':
     98 			skipclean = 0;
     99 			bflag = argtoi('b', "number", optarg, 10);
    100 			printf("Alternate super block location: %d\n", bflag);
    101 			break;
    102 
    103 		case 'c':
    104 			skipclean = 0;
    105 			cvtlevel = argtoi('c', "conversion level", optarg, 10);
    106 			break;
    107 
    108 		case 'd':
    109 			debug++;
    110 			break;
    111 
    112 		case 'f':
    113 			skipclean = 0;
    114 			break;
    115 
    116 		case 'm':
    117 			lfmode = argtoi('m', "mode", optarg, 8);
    118 			if (lfmode &~ 07777)
    119 				errx(EEXIT, "bad mode to -m: %o", lfmode);
    120 			printf("** lost+found creation mode %o\n", lfmode);
    121 			break;
    122 
    123 		case 'n':
    124 			nflag++;
    125 			yflag = 0;
    126 			break;
    127 
    128 		case 'p':
    129 			preen++;
    130 			break;
    131 
    132 		case 'y':
    133 			yflag++;
    134 			nflag = 0;
    135 			break;
    136 
    137 		default:
    138 			usage();
    139 		}
    140 	}
    141 
    142 	argc -= optind;
    143 	argv += optind;
    144 
    145 	if (!argc)
    146 		usage();
    147 
    148 	if (signal(SIGINT, SIG_IGN) != SIG_IGN)
    149 		(void)signal(SIGINT, catch);
    150 	if (preen)
    151 		(void)signal(SIGQUIT, catchquit);
    152 
    153 	while (argc-- > 0)
    154 		(void)checkfilesys(blockcheck(*argv++), 0, 0L, 0);
    155 
    156 	if (returntosingle)
    157 		ret = 2;
    158 
    159 	exit(ret);
    160 }
    161 
    162 static int
    163 argtoi(flag, req, str, base)
    164 	int flag;
    165 	char *req, *str;
    166 	int base;
    167 {
    168 	char *cp;
    169 	int ret;
    170 
    171 	ret = (int)strtol(str, &cp, base);
    172 	if (cp == str || *cp)
    173 		errx(EEXIT, "-%c flag requires a %s", flag, req);
    174 	return (ret);
    175 }
    176 
    177 /*
    178  * Check the specified filesystem.
    179  */
    180 /* ARGSUSED */
    181 static int
    182 checkfilesys(filesys, mntpt, auxdata, child)
    183 	char *filesys, *mntpt;
    184 	long auxdata;
    185 	int child;
    186 {
    187 	ufs_daddr_t n_ffree, n_bfree;
    188 	struct dups *dp;
    189 	struct zlncnt *zlnp;
    190 #ifdef LITE2BORKEN
    191 	int cylno, flags;
    192 #else
    193 	int cylno;
    194 #endif
    195 
    196 	if (preen && child)
    197 		(void)signal(SIGQUIT, voidquit);
    198 	setcdevname(filesys, preen);
    199 	if (debug && preen)
    200 		pwarn("starting\n");
    201 	switch (setup(filesys)) {
    202 	case 0:
    203 		if (preen)
    204 			pfatal("CAN'T CHECK FILE SYSTEM.");
    205 		/* fall through */
    206 	case -1:
    207 		return (0);
    208 	}
    209 	/*
    210 	 * 1: scan inodes tallying blocks used
    211 	 */
    212 	if (preen == 0) {
    213 		printf("** Last Mounted on %s\n", sblock.fs_fsmnt);
    214 		if (hotroot())
    215 			printf("** Root file system\n");
    216 		printf("** Phase 1 - Check Blocks and Sizes\n");
    217 	}
    218 	pass1();
    219 
    220 	/*
    221 	 * 1b: locate first references to duplicates, if any
    222 	 */
    223 	if (duplist) {
    224 		if (preen)
    225 			pfatal("INTERNAL ERROR: dups with -p");
    226 		printf("** Phase 1b - Rescan For More DUPS\n");
    227 		pass1b();
    228 	}
    229 
    230 	/*
    231 	 * 2: traverse directories from root to mark all connected directories
    232 	 */
    233 	if (preen == 0)
    234 		printf("** Phase 2 - Check Pathnames\n");
    235 	pass2();
    236 
    237 	/*
    238 	 * 3: scan inodes looking for disconnected directories
    239 	 */
    240 	if (preen == 0)
    241 		printf("** Phase 3 - Check Connectivity\n");
    242 	pass3();
    243 
    244 	/*
    245 	 * 4: scan inodes looking for disconnected files; check reference counts
    246 	 */
    247 	if (preen == 0)
    248 		printf("** Phase 4 - Check Reference Counts\n");
    249 	pass4();
    250 
    251 	/*
    252 	 * 5: check and repair resource counts in cylinder groups
    253 	 */
    254 	if (preen == 0)
    255 		printf("** Phase 5 - Check Cyl groups\n");
    256 	pass5();
    257 
    258 	/*
    259 	 * print out summary statistics
    260 	 */
    261 	n_ffree = sblock.fs_cstotal.cs_nffree;
    262 	n_bfree = sblock.fs_cstotal.cs_nbfree;
    263 	pwarn("%d files, %d used, %d free ",
    264 	    n_files, n_blks, n_ffree + sblock.fs_frag * n_bfree);
    265 	printf("(%d frags, %d blocks, %d.%d%% fragmentation)\n",
    266 	    n_ffree, n_bfree, (n_ffree * 100) / sblock.fs_dsize,
    267 	    ((n_ffree * 1000 + sblock.fs_dsize / 2) / sblock.fs_dsize) % 10);
    268 	if (debug &&
    269 	    (n_files -= maxino - ROOTINO - sblock.fs_cstotal.cs_nifree))
    270 		printf("%d files missing\n", n_files);
    271 	if (debug) {
    272 		n_blks += sblock.fs_ncg *
    273 			(cgdmin(&sblock, 0) - cgsblock(&sblock, 0));
    274 		n_blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0);
    275 		n_blks += howmany(sblock.fs_cssize, sblock.fs_fsize);
    276 		if (n_blks -= maxfsblock - (n_ffree + sblock.fs_frag * n_bfree))
    277 			printf("%d blocks missing\n", n_blks);
    278 		if (duplist != NULL) {
    279 			printf("The following duplicate blocks remain:");
    280 			for (dp = duplist; dp; dp = dp->next)
    281 				printf(" %d,", dp->dup);
    282 			printf("\n");
    283 		}
    284 		if (zlnhead != NULL) {
    285 			printf("The following zero link count inodes remain:");
    286 			for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
    287 				printf(" %u,", zlnp->zlncnt);
    288 			printf("\n");
    289 		}
    290 	}
    291 	zlnhead = (struct zlncnt *)0;
    292 	duplist = (struct dups *)0;
    293 	muldup = (struct dups *)0;
    294 	inocleanup();
    295 	if (fsmodified) {
    296 		(void)time(&sblock.fs_time);
    297 		sbdirty();
    298 	}
    299 	if (cvtlevel && sblk.b_dirty) {
    300 		/*
    301 		 * Write out the duplicate super blocks
    302 		 */
    303 		for (cylno = 0; cylno < sblock.fs_ncg; cylno++)
    304 			bwrite(fswritefd, (char *)&sblock,
    305 			    fsbtodb(&sblock, cgsblock(&sblock, cylno)), SBSIZE);
    306 	}
    307 #if LITE2BORKEN
    308 	if (!hotroot()) {
    309 		ckfini(1);
    310 	} else {
    311 		struct statfs stfs_buf;
    312 		/*
    313 		 * Check to see if root is mounted read-write.
    314 		 */
    315 		if (statfs("/", &stfs_buf) == 0)
    316 			flags = stfs_buf.f_flags;
    317 		else
    318 			flags = 0;
    319 		ckfini(flags & MNT_RDONLY);
    320 	}
    321 #else
    322 	ckfini(1);
    323 #endif
    324 	free(blockmap);
    325 	free(statemap);
    326 	free((char *)lncntp);
    327 	if (!fsmodified)
    328 		return (0);
    329 	if (!preen)
    330 		printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
    331 	if (rerun)
    332 		printf("\n***** PLEASE RERUN FSCK *****\n");
    333 	if (hotroot()) {
    334 		struct statfs stfs_buf;
    335 		/*
    336 		 * We modified the root.  Do a mount update on
    337 		 * it, unless it is read-write, so we can continue.
    338 		 */
    339 		if (statfs("/", &stfs_buf) == 0) {
    340 			long flags = stfs_buf.f_flags;
    341 			struct ufs_args args;
    342 			int ret;
    343 
    344 			if (flags & MNT_RDONLY) {
    345 				args.fspec = 0;
    346 				args.export.ex_flags = 0;
    347 				args.export.ex_root = 0;
    348 				flags |= MNT_UPDATE | MNT_RELOAD;
    349 				ret = mount(MOUNT_FFS, "/", flags, &args);
    350 				if (ret == 0)
    351 					return(0);
    352 			}
    353 		}
    354 		if (!preen)
    355 			printf("\n***** REBOOT NOW *****\n");
    356 		sync();
    357 		return (4);
    358 	}
    359 	return (0);
    360 }
    361 
    362 static void
    363 usage()
    364 {
    365 	extern char *__progname;
    366 
    367 	(void) fprintf(stderr,
    368 	    "Usage: %s [-dfnpy] [-b block] [-c level] [-m mode] filesystem ...\n",
    369 	    __progname);
    370 	exit(1);
    371 }
    372 
    373