Return to clri.c CVS log

Up to [CSRG BSD Unix] / 43BSDReno / sbin / clri

Annotation of 43BSDReno/sbin/clri/clri.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1990 The Regents of the University of California.
        !             3:  * 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 are permitted provided
        !             9:  * that: (1) source distributions retain this entire copyright notice and
        !            10:  * comment, and (2) distributions including binaries display the following
        !            11:  * acknowledgement:  ``This product includes software developed by the
        !            12:  * University of California, Berkeley and its contributors'' in the
        !            13:  * documentation or other materials provided with the distribution and in
        !            14:  * all advertising materials mentioning features or use of this software.
        !            15:  * Neither the name of the University nor the names of its contributors may
        !            16:  * be used to endorse or promote products derived from this software without
        !            17:  * specific prior written permission.
        !            18:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            19:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            20:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            21:  */
        !            22: 
        !            23: #ifndef lint
        !            24: char copyright[] =
        !            25: "@(#) Copyright (c) 1990 The Regents of the University of California.\n\
        !            26:  All rights reserved.\n";
        !            27: #endif /* not lint */
        !            28: 
        !            29: #ifndef lint
        !            30: static char sccsid[] = "@(#)clri.c     5.2 (Berkeley) 6/11/90";
        !            31: #endif /* not lint */
        !            32: 
        !            33: /*
        !            34:  * clri(8)
        !            35:  */
        !            36: 
        !            37: #include <sys/param.h>
        !            38: #include <sys/time.h>
        !            39: #include <sys/vnode.h>
        !            40: #include <ufs/quota.h>
        !            41: #include <ufs/inode.h>
        !            42: #include <ufs/fs.h>
        !            43: #include <unistd.h>
        !            44: #include <stdio.h>
        !            45: #include <fcntl.h>
        !            46: #include <errno.h>
        !            47: 
        !            48: char *fs;
        !            49: 
        !            50: main(argc, argv)
        !            51:        int argc;
        !            52:        char **argv;
        !            53: {
        !            54:        register struct fs *sbp;
        !            55:        register struct dinode *ip;
        !            56:        register int fd;
        !            57:        struct dinode ibuf[MAXBSIZE / sizeof (struct dinode)];
        !            58:        long generation, offset, bsize;
        !            59:        int inonum;
        !            60:        char sblock[SBSIZE];
        !            61: 
        !            62:        if (argc < 3) {
        !            63:                (void)fprintf(stderr, "usage: clri filesystem inode ...\n");
        !            64:                exit(1);
        !            65:        }
        !            66: 
        !            67:        fs = *++argv;
        !            68: 
        !            69:        /* get the superblock. */
        !            70:        if ((fd = open(fs, O_RDWR, 0)) < 0)
        !            71:                error();
        !            72:        if (lseek(fd, SBLOCK * DEV_BSIZE, SEEK_SET) < 0)
        !            73:                error();
        !            74:        if (read(fd, sblock, sizeof(sblock)) != sizeof(sblock)) {
        !            75:                (void)fprintf(stderr,
        !            76:                    "clri: %s: can't read the superblock.\n", fs);
        !            77:                exit(1);
        !            78:        }
        !            79: 
        !            80:        sbp = (struct fs *)sblock;
        !            81:        if (sbp->fs_magic != FS_MAGIC) {
        !            82:                (void)fprintf(stderr,
        !            83:                    "clri: %s: superblock magic number 0x%x, not 0x%x.\n",
        !            84:                    fs, sbp->fs_magic, FS_MAGIC);
        !            85:                exit(1);
        !            86:        }
        !            87:        bsize = sbp->fs_bsize;
        !            88: 
        !            89:        /* remaining arguments are inode numbers. */
        !            90:        while (*++argv) {
        !            91:                /* get the inode number. */
        !            92:                if ((inonum = atoi(*argv)) <= 0) {
        !            93:                        (void)fprintf(stderr,
        !            94:                            "clri: %s is not a valid inode number.\n", *argv);
        !            95:                        exit(1);
        !            96:                }
        !            97:                (void)printf("clearing %d\n", inonum);
        !            98: 
        !            99:                /* read in the appropriate block. */
        !           100:                offset = itod(sbp, inonum);     /* inode to fs block */
        !           101:                offset = fsbtodb(sbp, offset);  /* fs block to disk block */
        !           102:                offset *= DEV_BSIZE;            /* disk block to disk bytes */
        !           103: 
        !           104:                /* seek and read the block */
        !           105:                if (lseek(fd, offset, SEEK_SET) < 0)
        !           106:                        error();
        !           107:                if (read(fd, (char *)ibuf, bsize) != bsize)
        !           108:                        error();
        !           109: 
        !           110:                /* get the inode within the block. */
        !           111:                ip = &ibuf[itoo(sbp, inonum)];
        !           112: 
        !           113:                /* clear the inode, and bump the generation count. */
        !           114:                generation = ip->di_gen + 1;
        !           115:                bzero((char *)ip, sizeof *ip);
        !           116:                ip->di_gen = generation;
        !           117: 
        !           118:                /* backup and write the block */
        !           119:                if (lseek(fd, -bsize, SEEK_CUR) < 0)
        !           120:                        error();
        !           121:                if (write(fd, (char *)ibuf, bsize) != bsize)
        !           122:                        error();
        !           123:                (void)fsync(fd);
        !           124:        }
        !           125:        (void)close(fd);
        !           126:        exit(0);
        !           127: }
        !           128: 
        !           129: error()
        !           130: {
        !           131:        (void)fprintf(stderr, "clri: %s: %s\n", fs, strerror(errno));
        !           132:        exit(1);
        !           133: }

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.