1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 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 $alz of BBN Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #if 0 36 #ifndef lint 37 static const char copyright[] = 38 "@(#) Copyright (c) 1990, 1993\n\ 39 The Regents of the University of California. All rights reserved.\n"; 40 #endif /* not lint */ 41 42 #ifndef lint 43 static char sccsid[] = "@(#)clri.c 8.2 (Berkeley) 9/23/93"; 44 #endif /* not lint */ 45 #endif 46 47 #include <sys/cdefs.h> 48 __FBSDID("$FreeBSD$"); 49 50 #include <sys/param.h> 51 #include <sys/disklabel.h> 52 53 #include <ufs/ufs/dinode.h> 54 #include <ufs/ffs/fs.h> 55 56 #include <err.h> 57 #include <fcntl.h> 58 #include <stdlib.h> 59 #include <string.h> 60 #include <stdio.h> 61 #include <unistd.h> 62 63 /* 64 * Possible superblock locations ordered from most to least likely. 65 */ 66 static int sblock_try[] = SBLOCKSEARCH; 67 68 static void 69 usage(void) 70 { 71 (void)fprintf(stderr, "usage: clri special_device inode_number ...\n"); 72 exit(1); 73 } 74 75 int 76 main(int argc, char *argv[]) 77 { 78 struct fs *sbp; 79 struct ufs1_dinode *dp1; 80 struct ufs2_dinode *dp2; 81 char *ibuf[MAXBSIZE]; 82 long generation, bsize; 83 off_t offset; 84 int i, fd, inonum; 85 char *fs, sblock[SBLOCKSIZE]; 86 void *v = ibuf; 87 88 if (argc < 3) 89 usage(); 90 91 fs = *++argv; 92 sbp = NULL; 93 94 /* get the superblock. */ 95 if ((fd = open(fs, O_RDWR, 0)) < 0) 96 err(1, "%s", fs); 97 for (i = 0; sblock_try[i] != -1; i++) { 98 if (lseek(fd, (off_t)(sblock_try[i]), SEEK_SET) < 0) 99 err(1, "%s", fs); 100 if (read(fd, sblock, sizeof(sblock)) != sizeof(sblock)) 101 errx(1, "%s: can't read superblock", fs); 102 sbp = (struct fs *)sblock; 103 if ((sbp->fs_magic == FS_UFS1_MAGIC || 104 (sbp->fs_magic == FS_UFS2_MAGIC && 105 sbp->fs_sblockloc == sblock_try[i])) && 106 sbp->fs_bsize <= MAXBSIZE && 107 sbp->fs_bsize >= (int)sizeof(struct fs)) 108 break; 109 } 110 if (sblock_try[i] == -1) 111 errx(2, "cannot find file system superblock"); 112 bsize = sbp->fs_bsize; 113 114 /* remaining arguments are inode numbers. */ 115 while (*++argv) { 116 /* get the inode number. */ 117 if ((inonum = atoi(*argv)) <= 0) 118 errx(1, "%s is not a valid inode number", *argv); 119 (void)printf("clearing %d\n", inonum); 120 121 /* read in the appropriate block. */ 122 offset = ino_to_fsba(sbp, inonum); /* inode to fs blk */ 123 offset = fsbtodb(sbp, offset); /* fs blk disk blk */ 124 offset *= DEV_BSIZE; /* disk blk to bytes */ 125 126 /* seek and read the block */ 127 if (lseek(fd, offset, SEEK_SET) < 0) 128 err(1, "%s", fs); 129 if (read(fd, ibuf, bsize) != bsize) 130 err(1, "%s", fs); 131 132 if (sbp->fs_magic == FS_UFS2_MAGIC) { 133 /* get the inode within the block. */ 134 dp2 = &(((struct ufs2_dinode *)v) 135 [ino_to_fsbo(sbp, inonum)]); 136 137 /* clear the inode, and bump the generation count. */ 138 generation = dp2->di_gen + 1; 139 memset(dp2, 0, sizeof(*dp2)); 140 dp2->di_gen = generation; 141 } else { 142 /* get the inode within the block. */ 143 dp1 = &(((struct ufs1_dinode *)v) 144 [ino_to_fsbo(sbp, inonum)]); 145 146 /* clear the inode, and bump the generation count. */ 147 generation = dp1->di_gen + 1; 148 memset(dp1, 0, sizeof(*dp1)); 149 dp1->di_gen = generation; 150 } 151 152 /* backup and write the block */ 153 if (lseek(fd, (off_t)-bsize, SEEK_CUR) < 0) 154 err(1, "%s", fs); 155 if (write(fd, ibuf, bsize) != bsize) 156 err(1, "%s", fs); 157 (void)fsync(fd); 158 } 159 (void)close(fd); 160 exit(0); 161 } 162