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main.c revision 1.21 
      1 /*	$NetBSD: main.c,v 1.21 1996/09/27 22:45:14 christos 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 #ifndef lint
     37 static char copyright[] =
     38 "@(#) 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 static char rcsid[] = "$NetBSD: main.c,v 1.21 1996/09/27 22:45:14 christos 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 int	argtoi __P((int, char *, char *, int));
     68 int	checkfilesys __P((char *, char *, long, int));
     69 int	docheck __P((struct fstab *));
     70 int	main __P((int, char *[]));
     71 
     72 int
     73 main(argc, argv)
     74 	int	argc;
     75 	char	*argv[];
     76 {
     77 	int ch;
     78 	int ret = 0;
     79 	extern char *optarg;
     80 	extern int optind;
     81 
     82 	sync();
     83 	skipclean = 1;
     84 	while ((ch = getopt(argc, argv, "dfpnNyYb:c:l:m:")) != EOF) {
     85 		switch (ch) {
     86 		case 'p':
     87 			preen++;
     88 			break;
     89 
     90 		case 'b':
     91 			skipclean = 0;
     92 			bflag = argtoi('b', "number", optarg, 10);
     93 			printf("Alternate super block location: %d\n", bflag);
     94 			break;
     95 
     96 		case 'c':
     97 			skipclean = 0;
     98 			cvtlevel = argtoi('c', "conversion level", optarg, 10);
     99 			break;
    100 
    101 		case 'd':
    102 			debug++;
    103 			break;
    104 
    105 		case 'f':
    106 			skipclean = 0;
    107 			break;
    108 
    109 		case 'm':
    110 			lfmode = argtoi('m', "mode", optarg, 8);
    111 			if (lfmode &~ 07777)
    112 				errexit("bad mode to -m: %o\n", lfmode);
    113 			printf("** lost+found creation mode %o\n", lfmode);
    114 			break;
    115 
    116 		case 'n':
    117 		case 'N':
    118 			nflag++;
    119 			yflag = 0;
    120 			break;
    121 
    122 		case 'y':
    123 		case 'Y':
    124 			yflag++;
    125 			nflag = 0;
    126 			break;
    127 
    128 		default:
    129 			errexit("%c option?\n", ch);
    130 		}
    131 	}
    132 	argc -= optind;
    133 	argv += optind;
    134 	if (signal(SIGINT, SIG_IGN) != SIG_IGN)
    135 		(void)signal(SIGINT, catch);
    136 	if (preen)
    137 		(void)signal(SIGQUIT, catchquit);
    138 
    139 	if (argc)
    140 		while (argc-- > 0)
    141 			(void)checkfilesys(blockcheck(*argv++), 0, 0L, 0);
    142 
    143 	if (returntosingle)
    144 		ret = 2;
    145 
    146 	exit(ret);
    147 }
    148 
    149 int
    150 argtoi(flag, req, str, base)
    151 	int flag;
    152 	char *req, *str;
    153 	int base;
    154 {
    155 	char *cp;
    156 	int ret;
    157 
    158 	ret = (int)strtol(str, &cp, base);
    159 	if (cp == str || *cp)
    160 		errexit("-%c flag requires a %s\n", flag, req);
    161 	return (ret);
    162 }
    163 
    164 /*
    165  * Determine whether a filesystem should be checked.
    166  */
    167 int
    168 docheck(fsp)
    169 	register struct fstab *fsp;
    170 {
    171 
    172 	if ((strcmp(fsp->fs_vfstype, "ufs") &&
    173 	     strcmp(fsp->fs_vfstype, "ffs")) ||
    174 	    (strcmp(fsp->fs_type, FSTAB_RW) &&
    175 	     strcmp(fsp->fs_type, FSTAB_RO)) ||
    176 	    fsp->fs_passno == 0)
    177 		return (0);
    178 	return (1);
    179 }
    180 
    181 /*
    182  * Check the specified filesystem.
    183  */
    184 /* ARGSUSED */
    185 int
    186 checkfilesys(filesys, mntpt, auxdata, child)
    187 	char *filesys, *mntpt;
    188 	long auxdata;
    189 	int child;
    190 {
    191 	daddr_t n_ffree, n_bfree;
    192 	struct dups *dp;
    193 	struct zlncnt *zlnp;
    194 	int cylno;
    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 	case -1:
    206 		return (0);
    207 	}
    208 	/*
    209 	 * 1: scan inodes tallying blocks used
    210 	 */
    211 	if (preen == 0) {
    212 		printf("** Last Mounted on %s\n", sblock.fs_fsmnt);
    213 		if (hotroot())
    214 			printf("** Root file system\n");
    215 		printf("** Phase 1 - Check Blocks and Sizes\n");
    216 	}
    217 	pass1();
    218 
    219 	/*
    220 	 * 1b: locate first references to duplicates, if any
    221 	 */
    222 	if (duplist) {
    223 		if (preen)
    224 			pfatal("INTERNAL ERROR: dups with -p");
    225 		printf("** Phase 1b - Rescan For More DUPS\n");
    226 		pass1b();
    227 	}
    228 
    229 	/*
    230 	 * 2: traverse directories from root to mark all connected directories
    231 	 */
    232 	if (preen == 0)
    233 		printf("** Phase 2 - Check Pathnames\n");
    234 	pass2();
    235 
    236 	/*
    237 	 * 3: scan inodes looking for disconnected directories
    238 	 */
    239 	if (preen == 0)
    240 		printf("** Phase 3 - Check Connectivity\n");
    241 	pass3();
    242 
    243 	/*
    244 	 * 4: scan inodes looking for disconnected files; check reference counts
    245 	 */
    246 	if (preen == 0)
    247 		printf("** Phase 4 - Check Reference Counts\n");
    248 	pass4();
    249 
    250 	/*
    251 	 * 5: check and repair resource counts in cylinder groups
    252 	 */
    253 	if (preen == 0)
    254 		printf("** Phase 5 - Check Cyl groups\n");
    255 	pass5();
    256 
    257 	/*
    258 	 * print out summary statistics
    259 	 */
    260 	n_ffree = sblock.fs_cstotal.cs_nffree;
    261 	n_bfree = sblock.fs_cstotal.cs_nbfree;
    262 	pwarn("%d files, %d used, %d free ",
    263 	    n_files, n_blks, n_ffree + sblock.fs_frag * n_bfree);
    264 	printf("(%d frags, %d blocks, %d.%d%% fragmentation)\n",
    265 	    n_ffree, n_bfree, (n_ffree * 100) / sblock.fs_dsize,
    266 	    ((n_ffree * 1000 + sblock.fs_dsize / 2) / sblock.fs_dsize) % 10);
    267 	if (debug &&
    268 	    (n_files -= maxino - ROOTINO - sblock.fs_cstotal.cs_nifree))
    269 		printf("%d files missing\n", n_files);
    270 	if (debug) {
    271 		n_blks += sblock.fs_ncg *
    272 			(cgdmin(&sblock, 0) - cgsblock(&sblock, 0));
    273 		n_blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0);
    274 		n_blks += howmany(sblock.fs_cssize, sblock.fs_fsize);
    275 		if (n_blks -= maxfsblock - (n_ffree + sblock.fs_frag * n_bfree))
    276 			printf("%d blocks missing\n", n_blks);
    277 		if (duplist != NULL) {
    278 			printf("The following duplicate blocks remain:");
    279 			for (dp = duplist; dp; dp = dp->next)
    280 				printf(" %d,", dp->dup);
    281 			printf("\n");
    282 		}
    283 		if (zlnhead != NULL) {
    284 			printf("The following zero link count inodes remain:");
    285 			for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
    286 				printf(" %u,", zlnp->zlncnt);
    287 			printf("\n");
    288 		}
    289 	}
    290 	zlnhead = (struct zlncnt *)0;
    291 	duplist = (struct dups *)0;
    292 	muldup = (struct dups *)0;
    293 	inocleanup();
    294 	if (fsmodified) {
    295 		(void)time(&sblock.fs_time);
    296 		sbdirty();
    297 	}
    298 	if (cvtlevel && sblk.b_dirty) {
    299 		/*
    300 		 * Write out the duplicate super blocks
    301 		 */
    302 		for (cylno = 0; cylno < sblock.fs_ncg; cylno++)
    303 			bwrite(fswritefd, (char *)&sblock,
    304 			    fsbtodb(&sblock, cgsblock(&sblock, cylno)), SBSIZE);
    305 	}
    306 	ckfini(1);
    307 	free(blockmap);
    308 	free(statemap);
    309 	free((char *)lncntp);
    310 	if (!fsmodified)
    311 		return (0);
    312 	if (!preen)
    313 		printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
    314 	if (hotroot()) {
    315 		struct statfs stfs_buf;
    316 		/*
    317 		 * We modified the root.  Do a mount update on
    318 		 * it, unless it is read-write, so we can continue.
    319 		 */
    320 		if (statfs("/", &stfs_buf) == 0) {
    321 			long flags = stfs_buf.f_flags;
    322 			struct ufs_args args;
    323 			int ret;
    324 
    325 			if (flags & MNT_RDONLY) {
    326 				args.fspec = 0;
    327 				args.export.ex_flags = 0;
    328 				args.export.ex_root = 0;
    329 				flags |= MNT_UPDATE | MNT_RELOAD;
    330 				ret = mount(MOUNT_FFS, "/", flags, &args);
    331 				if (ret == 0)
    332 					return(0);
    333 			}
    334 		}
    335 		if (!preen)
    336 			printf("\n***** REBOOT NOW *****\n");
    337 		sync();
    338 		return (4);
    339 	}
    340 	return (0);
    341 }
    342