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Diffstat (limited to 'sbin/clri/clri.c')
| -rw-r--r-- | sbin/clri/clri.c | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/sbin/clri/clri.c b/sbin/clri/clri.c new file mode 100644 index 000000000000..c2bdcccc1d9d --- /dev/null +++ b/sbin/clri/clri.c @@ -0,0 +1,140 @@ +/* + * Copyright (c) 1990, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Rich $alz of BBN Inc. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char copyright[] = +"@(#) Copyright (c) 1990, 1993\n\ + The Regents of the University of California. All rights reserved.\n"; +#endif /* not lint */ + +#ifndef lint +static char sccsid[] = "@(#)clri.c 8.2 (Berkeley) 9/23/93"; +#endif /* not lint */ + +#include <sys/param.h> +#include <sys/time.h> + +#include <ufs/ufs/dinode.h> +#include <ufs/ffs/fs.h> + +#include <err.h> +#include <errno.h> +#include <fcntl.h> +#include <stdlib.h> +#include <string.h> +#include <stdio.h> +#include <unistd.h> + +int +main(argc, argv) + int argc; + char *argv[]; +{ + register struct fs *sbp; + register struct dinode *ip; + register int fd; + struct dinode ibuf[MAXBSIZE / sizeof (struct dinode)]; + long generation, bsize; + off_t offset; + int inonum; + char *fs, sblock[SBSIZE]; + + if (argc < 3) { + (void)fprintf(stderr, "usage: clri filesystem inode ...\n"); + exit(1); + } + + fs = *++argv; + + /* get the superblock. */ + if ((fd = open(fs, O_RDWR, 0)) < 0) + err(1, "%s", fs); + if (lseek(fd, (off_t)(SBLOCK * DEV_BSIZE), SEEK_SET) < 0) + err(1, "%s", fs); + if (read(fd, sblock, sizeof(sblock)) != sizeof(sblock)) { + (void)fprintf(stderr, + "clri: %s: can't read the superblock.\n", fs); + exit(1); + } + + sbp = (struct fs *)sblock; + if (sbp->fs_magic != FS_MAGIC) { + (void)fprintf(stderr, + "clri: %s: superblock magic number 0x%x, not 0x%x.\n", + fs, sbp->fs_magic, FS_MAGIC); + exit(1); + } + bsize = sbp->fs_bsize; + + /* remaining arguments are inode numbers. */ + while (*++argv) { + /* get the inode number. */ + if ((inonum = atoi(*argv)) <= 0) { + (void)fprintf(stderr, + "clri: %s is not a valid inode number.\n", *argv); + exit(1); + } + (void)printf("clearing %d\n", inonum); + + /* read in the appropriate block. */ + offset = ino_to_fsba(sbp, inonum); /* inode to fs blk */ + offset = fsbtodb(sbp, offset); /* fs blk disk blk */ + offset *= DEV_BSIZE; /* disk blk to bytes */ + + /* seek and read the block */ + if (lseek(fd, offset, SEEK_SET) < 0) + err(1, "%s", fs); + if (read(fd, ibuf, bsize) != bsize) + err(1, "%s", fs); + + /* get the inode within the block. */ + ip = &ibuf[ino_to_fsbo(sbp, inonum)]; + + /* clear the inode, and bump the generation count. */ + generation = ip->di_gen + 1; + memset(ip, 0, sizeof(*ip)); + ip->di_gen = generation; + + /* backup and write the block */ + if (lseek(fd, (off_t)-bsize, SEEK_CUR) < 0) + err(1, "%s", fs); + if (write(fd, ibuf, bsize) != bsize) + err(1, "%s", fs); + (void)fsync(fd); + } + (void)close(fd); + exit(0); +} |