1 /* 2 * Copyright (c) 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Rich $alz of BBN Inc. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #ifndef lint 38 static const char copyright[] = 39 "@(#) Copyright (c) 1990, 1993\n\ 40 The Regents of the University of California. All rights reserved.\n"; 41 #endif /* not lint */ 42 43 #ifndef lint 44 #if 0 45 static char sccsid[] = "@(#)clri.c 8.2 (Berkeley) 9/23/93"; 46 #endif 47 static const char rcsid[] = 48 "$FreeBSD: src/sbin/clri/clri.c,v 1.4 1999/08/28 00:12:32 peter Exp $"; 49 #endif /* not lint */ 50 51 #include <sys/param.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 static void 64 usage(void) 65 { 66 (void)fprintf(stderr, "usage: clri filesystem inode ...\n"); 67 exit(1); 68 } 69 70 int 71 main(argc, argv) 72 int argc; 73 char *argv[]; 74 { 75 register struct fs *sbp; 76 register struct dinode *ip; 77 register int fd; 78 struct dinode ibuf[MAXBSIZE / sizeof (struct dinode)]; 79 long generation, bsize; 80 off_t offset; 81 int inonum; 82 char *fs, sblock[SBSIZE]; 83 84 if (argc < 3) 85 usage(); 86 87 fs = *++argv; 88 89 /* get the superblock. */ 90 if ((fd = open(fs, O_RDWR, 0)) < 0) 91 err(1, "%s", fs); 92 if (lseek(fd, (off_t)(SBLOCK * DEV_BSIZE), SEEK_SET) < 0) 93 err(1, "%s", fs); 94 if (read(fd, sblock, sizeof(sblock)) != sizeof(sblock)) 95 errx(1, "%s: can't read superblock", fs); 96 97 sbp = (struct fs *)sblock; 98 if (sbp->fs_magic != FS_MAGIC) 99 errx(1, "%s: superblock magic number 0x%x, not 0x%x", 100 fs, sbp->fs_magic, FS_MAGIC); 101 bsize = sbp->fs_bsize; 102 103 /* remaining arguments are inode numbers. */ 104 while (*++argv) { 105 /* get the inode number. */ 106 if ((inonum = atoi(*argv)) <= 0) 107 errx(1, "%s is not a valid inode number", *argv); 108 (void)printf("clearing %d\n", inonum); 109 110 /* read in the appropriate block. */ 111 offset = ino_to_fsba(sbp, inonum); /* inode to fs blk */ 112 offset = fsbtodb(sbp, offset); /* fs blk disk blk */ 113 offset *= DEV_BSIZE; /* disk blk to bytes */ 114 115 /* seek and read the block */ 116 if (lseek(fd, offset, SEEK_SET) < 0) 117 err(1, "%s", fs); 118 if (read(fd, ibuf, bsize) != bsize) 119 err(1, "%s", fs); 120 121 /* get the inode within the block. */ 122 ip = &ibuf[ino_to_fsbo(sbp, inonum)]; 123 124 /* clear the inode, and bump the generation count. */ 125 generation = ip->di_gen + 1; 126 memset(ip, 0, sizeof(*ip)); 127 ip->di_gen = generation; 128 129 /* backup and write the block */ 130 if (lseek(fd, (off_t)-bsize, SEEK_CUR) < 0) 131 err(1, "%s", fs); 132 if (write(fd, ibuf, bsize) != bsize) 133 err(1, "%s", fs); 134 (void)fsync(fd); 135 } 136 (void)close(fd); 137 exit(0); 138 } 139