1 /* $NetBSD: clri.c,v 1.18 2004/03/27 12:53:53 dsl Exp $ */ 2 3 /* 4 * Copyright (c) 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rich $alz of BBN Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 #ifndef lint 37 __COPYRIGHT("@(#) Copyright (c) 1990, 1993\n\ 38 The Regents of the University of California. All rights reserved.\n"); 39 #endif /* not lint */ 40 41 #ifndef lint 42 #if 0 43 static char sccsid[] = "@(#)clri.c 8.3 (Berkeley) 4/28/95"; 44 #else 45 __RCSID("$NetBSD: clri.c,v 1.18 2004/03/27 12:53:53 dsl Exp $"); 46 #endif 47 #endif /* not lint */ 48 49 #include <sys/param.h> 50 #include <sys/time.h> 51 52 #include <ufs/ufs/dinode.h> 53 #include <ufs/ufs/ufs_bswap.h> 54 #include <ufs/ffs/fs.h> 55 #include <ufs/ffs/ffs_extern.h> 56 57 #include <err.h> 58 #include <errno.h> 59 #include <fcntl.h> 60 #include <stdlib.h> 61 #include <string.h> 62 #include <stdio.h> 63 #include <unistd.h> 64 65 /* 66 * Possible superblock locations ordered from most to least likely. 67 */ 68 static off_t sblock_try[] = SBLOCKSEARCH; 69 off_t sblockloc; 70 71 72 int main __P((int, char *[])); 73 74 int 75 main(argc, argv) 76 int argc; 77 char *argv[]; 78 { 79 struct fs *sbp; 80 struct ufs1_dinode *ip1; 81 struct ufs2_dinode *ip2; 82 int fd; 83 char *ibuf[MAXBSIZE]; 84 int32_t generation; 85 off_t offset; 86 size_t bsize; 87 int inonum; 88 char *fs, sblock[SBLOCKSIZE]; 89 int needswap = 0, is_ufs2 = 0; 90 int i, imax; 91 92 if (argc < 3) { 93 (void)fprintf(stderr, "usage: clri filesystem inode ...\n"); 94 exit(1); 95 } 96 97 fs = *++argv; 98 99 100 /* get the superblock. */ 101 if ((fd = open(fs, O_RDWR, 0)) < 0) 102 err(1, "%s", fs); 103 for (i = 0;; i++) { 104 sblockloc = sblock_try[i]; 105 if (sblockloc == -1) 106 errx(1, "%s: can't find superblock", fs); 107 if (pread(fd, sblock, sizeof(sblock), sblockloc) != sizeof(sblock)) 108 errx(1, "%s: can't read superblock", fs); 109 110 sbp = (struct fs *)sblock; 111 switch(sbp->fs_magic) { 112 case FS_UFS2_MAGIC: 113 is_ufs2 = 1; 114 /*FALLTHROUGH*/ 115 case FS_UFS1_MAGIC: 116 break; 117 case FS_UFS2_MAGIC_SWAPPED: 118 is_ufs2 = 1; 119 /*FALLTHROUGH*/ 120 case FS_UFS1_MAGIC_SWAPPED: 121 needswap = 1; 122 break; 123 default: 124 continue; 125 } 126 127 /* check we haven't found an alternate */ 128 if (is_ufs2 || sbp->fs_old_flags & FS_FLAGS_UPDATED) { 129 if (sblockloc != ufs_rw64(sbp->fs_sblockloc, needswap)) 130 continue; 131 } else { 132 if (sblockloc == SBLOCK_UFS2) 133 continue; 134 } 135 136 break; 137 } 138 139 /* check that inode numbers are valid */ 140 imax = ufs_rw32(sbp->fs_ncg, needswap) * 141 ufs_rw32(sbp->fs_ipg, needswap); 142 for (i = 1; i < (argc - 1); i++) 143 if (atoi(argv[i]) <= 0 || atoi(argv[i]) >= imax) 144 errx(1, "%s is not a valid inode number", argv[i]); 145 146 /* delete clean flag in the superblok */ 147 sbp->fs_clean = ufs_rw32(ufs_rw32(sbp->fs_clean, needswap) << 1, 148 needswap); 149 if (lseek(fd, sblockloc, SEEK_SET) < 0) 150 err(1, "%s", fs); 151 if (write(fd, sblock, sizeof(sblock)) != sizeof(sblock)) 152 errx(1, "%s: can't rewrite superblock", fs); 153 (void)fsync(fd); 154 155 if (needswap) 156 ffs_sb_swap(sbp, sbp); 157 bsize = sbp->fs_bsize; 158 159 /* remaining arguments are inode numbers. */ 160 while (*++argv) { 161 /* get the inode number. */ 162 inonum = atoi(*argv); 163 (void)printf("clearing %d\n", inonum); 164 165 /* read in the appropriate block. */ 166 offset = ino_to_fsba(sbp, inonum); /* inode to fs blk */ 167 offset = fsbtodb(sbp, offset); /* fs blk disk blk */ 168 offset *= DEV_BSIZE; /* disk blk to bytes */ 169 170 /* seek and read the block */ 171 if (lseek(fd, offset, SEEK_SET) < 0) 172 err(1, "%s", fs); 173 if (read(fd, ibuf, bsize) != bsize) 174 err(1, "%s", fs); 175 176 /* get the inode within the block. */ 177 if (is_ufs2) { 178 ip2 = &((struct ufs2_dinode *)ibuf) 179 [ino_to_fsbo(sbp, inonum)]; 180 /* clear the inode, and bump the generation count. */ 181 generation = ip2->di_gen + 1; 182 memset(ip2, 0, sizeof(*ip2)); 183 ip2->di_gen = generation; 184 } else { 185 ip1 = &((struct ufs1_dinode *)ibuf) 186 [ino_to_fsbo(sbp, inonum)]; 187 /* clear the inode, and bump the generation count. */ 188 generation = ip1->di_gen + 1; 189 memset(ip1, 0, sizeof(*ip1)); 190 ip1->di_gen = generation; 191 } 192 193 /* backup and write the block */ 194 if (lseek(fd, offset, SEEK_SET) < 0) 195 err(1, "%s", fs); 196 if (write(fd, ibuf, bsize) != bsize) 197 err(1, "%s", fs); 198 (void)fsync(fd); 199 } 200 (void)close(fd); 201 exit(0); 202 } 203