* Copyright (c) 1990 The Regents of the University of California.
* This code is derived from software contributed to Berkeley by
* %sccs.include.redist.c%
"@(#) Copyright (c) 1990 The Regents of the University of California.\n\
static char sccsid
[] = "@(#)clri.c 5.3 (Berkeley) %G%";
register struct dinode
*ip
;
struct dinode ibuf
[MAXBSIZE
/ sizeof (struct dinode
)];
long generation
, offset
, bsize
;
(void)fprintf(stderr
, "usage: clri filesystem inode ...\n");
/* get the superblock. */
if ((fd
= open(fs
, O_RDWR
, 0)) < 0)
if (lseek(fd
, SBLOCK
* DEV_BSIZE
, SEEK_SET
) < 0)
if (read(fd
, sblock
, sizeof(sblock
)) != sizeof(sblock
)) {
"clri: %s: can't read the superblock.\n", fs
);
sbp
= (struct fs
*)sblock
;
if (sbp
->fs_magic
!= FS_MAGIC
) {
"clri: %s: superblock magic number 0x%x, not 0x%x.\n",
fs
, sbp
->fs_magic
, FS_MAGIC
);
/* remaining arguments are inode numbers. */
/* get the inode number. */
if ((inonum
= atoi(*argv
)) <= 0) {
"clri: %s is not a valid inode number.\n", *argv
);
(void)printf("clearing %d\n", inonum
);
/* read in the appropriate block. */
offset
= itod(sbp
, inonum
); /* inode to fs block */
offset
= fsbtodb(sbp
, offset
); /* fs block to disk block */
offset
*= DEV_BSIZE
; /* disk block to disk bytes */
/* seek and read the block */
if (lseek(fd
, offset
, SEEK_SET
) < 0)
if (read(fd
, (char *)ibuf
, bsize
) != bsize
)
/* get the inode within the block. */
ip
= &ibuf
[itoo(sbp
, inonum
)];
/* clear the inode, and bump the generation count. */
generation
= ip
->di_gen
+ 1;
bzero((char *)ip
, sizeof *ip
);
/* backup and write the block */
if (lseek(fd
, -bsize
, SEEK_CUR
) < 0)
if (write(fd
, (char *)ibuf
, bsize
) != bsize
)
(void)fprintf(stderr
, "clri: %s: %s\n", fs
, strerror(errno
));