109 lines
2.0 KiB
C
109 lines
2.0 KiB
C
#ifndef lint
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static char *sccsid = "@(#)clri.c 1.1 94/10/31 SMI"; /* from UCB 2.2 4/11/82 */
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#endif
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/*
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* clri filsys inumber ...
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*/
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/vnode.h>
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#include <sys/types.h>
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#include <sys/label.h>
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#include <sys/audit.h>
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#include <ufs/inode.h>
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#include <ufs/fs.h>
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#define ISIZE (sizeof(struct dinode))
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#define NI (MAXBSIZE/ISIZE)
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struct dinode buf[NI];
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union {
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char dummy[SBSIZE];
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struct fs sblk;
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} sb_un;
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#define sblock sb_un.sblk
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int status;
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main(argc, argv)
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int argc;
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char *argv[];
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{
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register i, f;
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unsigned n;
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int j, k;
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long off;
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long gen;
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audit_args(AU_MAJPRIV, argc, argv);
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if (argc < 3) {
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printf("usage: clri filsys inumber ...\n");
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exit(4);
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}
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f = open(argv[1], 2);
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if (f < 0) {
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printf("cannot open %s\n", argv[1]);
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exit(4);
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}
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lseek(f, SBLOCK * DEV_BSIZE, 0);
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if (read(f, &sblock, SBSIZE) != SBSIZE) {
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printf("cannot read %s\n", argv[1]);
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exit(4);
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}
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if (sblock.fs_magic != FS_MAGIC) {
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printf("bad super block magic number\n");
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exit(4);
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}
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for (i = 2; i < argc; i++) {
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if (!isnumber(argv[i])) {
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printf("%s: is not a number\n", argv[i]);
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status = 1;
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continue;
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}
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n = atoi(argv[i]);
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if (n == 0) {
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printf("%s: is zero\n", argv[i]);
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status = 1;
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continue;
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}
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off = fsbtodb(&sblock, itod(&sblock, n)) * DEV_BSIZE;
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lseek(f, off, 0);
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if (read(f, (char *)buf, sblock.fs_bsize) != sblock.fs_bsize) {
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printf("%s: read error\n", argv[i]);
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status = 1;
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}
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}
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if (status)
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exit(status);
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for (i = 2; i < argc; i++) {
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n = atoi(argv[i]);
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printf("clearing %u\n", n);
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off = fsbtodb(&sblock, itod(&sblock, n)) * DEV_BSIZE;
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lseek(f, off, 0);
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read(f, (char *)buf, sblock.fs_bsize);
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j = itoo(&sblock, n);
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gen = buf[j].di_gen;
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bzero((caddr_t)&buf[j], ISIZE);
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buf[j].di_gen = gen + 1;
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lseek(f, off, 0);
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write(f, (char *)buf, sblock.fs_bsize);
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}
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exit(status);
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/* NOTREACHED */
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}
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isnumber(s)
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char *s;
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{
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register c;
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while(c = *s++)
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if (c < '0' || c > '9')
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return(0);
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return(1);
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}
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