1 /* $NetBSD: clri.c,v 1.10 1997/09/14 08:44:09 lukem 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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 #ifndef lint 41 __COPYRIGHT("@(#) Copyright (c) 1990, 1993\n\ 42 The Regents of the University of California. All rights reserved.\n"); 43 #endif /* not lint */ 44 45 #ifndef lint 46 #if 0 47 static char sccsid[] = "@(#)clri.c 8.2 (Berkeley) 9/23/93"; 48 #else 49 __RCSID("$NetBSD: clri.c,v 1.10 1997/09/14 08:44:09 lukem Exp $"); 50 #endif 51 #endif /* not lint */ 52 53 #include <sys/param.h> 54 #include <sys/time.h> 55 56 #include <ufs/ufs/dinode.h> 57 #include <ufs/ffs/fs.h> 58 59 #include <err.h> 60 #include <errno.h> 61 #include <fcntl.h> 62 #include <stdlib.h> 63 #include <string.h> 64 #include <stdio.h> 65 #include <unistd.h> 66 67 int main __P((int, char *[])); 68 69 int 70 main(argc, argv) 71 int argc; 72 char *argv[]; 73 { 74 struct fs *sbp; 75 struct dinode *ip; 76 int fd; 77 struct dinode ibuf[MAXBSIZE / sizeof (struct dinode)]; 78 int32_t generation; 79 off_t offset; 80 size_t bsize; 81 int inonum; 82 char *fs, sblock[SBSIZE]; 83 84 if (argc < 3) { 85 (void)fprintf(stderr, "usage: clri filesystem inode ...\n"); 86 exit(1); 87 } 88 89 fs = *++argv; 90 91 /* get the superblock. */ 92 if ((fd = open(fs, O_RDWR, 0)) < 0) 93 err(1, "%s", fs); 94 if (lseek(fd, (off_t)(SBLOCK * DEV_BSIZE), SEEK_SET) < 0) 95 err(1, "%s", fs); 96 if (read(fd, sblock, sizeof(sblock)) != sizeof(sblock)) 97 errx(1, "%s: can't read superblock", fs); 98 99 sbp = (struct fs *)sblock; 100 if (sbp->fs_magic != FS_MAGIC) 101 errx(1, "%s: superblock magic number 0x%x, not 0x%x", 102 fs, sbp->fs_magic, FS_MAGIC); 103 bsize = sbp->fs_bsize; 104 105 /* remaining arguments are inode numbers. */ 106 while (*++argv) { 107 /* get the inode number. */ 108 if ((inonum = atoi(*argv)) <= 0) 109 errx(1, "%s is not a valid inode number", *argv); 110 (void)printf("clearing %d\n", inonum); 111 112 /* read in the appropriate block. */ 113 offset = ino_to_fsba(sbp, inonum); /* inode to fs blk */ 114 offset = fsbtodb(sbp, offset); /* fs blk disk blk */ 115 offset *= DEV_BSIZE; /* disk blk to bytes */ 116 117 /* seek and read the block */ 118 if (lseek(fd, offset, SEEK_SET) < 0) 119 err(1, "%s", fs); 120 if (read(fd, ibuf, bsize) != bsize) 121 err(1, "%s", fs); 122 123 /* get the inode within the block. */ 124 ip = &ibuf[ino_to_fsbo(sbp, inonum)]; 125 126 /* clear the inode, and bump the generation count. */ 127 generation = ip->di_gen + 1; 128 memset(ip, 0, sizeof(*ip)); 129 ip->di_gen = generation; 130 131 /* backup and write the block */ 132 if (lseek(fd, offset, SEEK_SET) < 0) 133 err(1, "%s", fs); 134 if (write(fd, ibuf, bsize) != bsize) 135 err(1, "%s", fs); 136 (void)fsync(fd); 137 } 138 (void)close(fd); 139 exit(0); 140 } 141