GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: sbin/clri/clri.c Lines: 0 58 0.0 %
Date: 2017-11-07 Branches: 0 38 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: clri.c,v 1.19 2016/03/07 21:47:04 natano Exp $	*/
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/*	$NetBSD: clri.c,v 1.19 2005/01/20 15:50:47 xtraeme Exp $	*/
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/*
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 * Copyright (c) 1990, 1993
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 *	The Regents of the University of California.  All rights reserved.
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 *
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 * This code is derived from software contributed to Berkeley by
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 * Rich $alz of BBN Inc.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. Neither the name of the University nor the names of its contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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#include <sys/param.h>	/* MAXBSIZE DEV_BSIZE */
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#include <ufs/ufs/dinode.h>
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#include <ufs/ffs/fs.h>
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#include <err.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <util.h>
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/*
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 * Possible superblock locations ordered from most to least likely.
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 */
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static int sblock_try[] = SBLOCKSEARCH;
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static void
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usage(void)
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{
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	(void)fprintf(stderr, "usage: clri special_device inode_number ...\n");
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	exit(1);
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}
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int
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main(int argc, char *argv[])
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{
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	struct ufs1_dinode *dp1;
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	struct ufs2_dinode *dp2;
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	struct fs *sbp;
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	char *ibuf[MAXBSIZE];
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	char *fs, sblock[SBLOCKSIZE];
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	size_t bsize;
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	off_t offset;
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	int i, fd, imax, inonum;
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	if (argc < 3)
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		usage();
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	fs = *++argv;
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	sbp = NULL;
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	/* get the superblock. */
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	if ((fd = opendev(fs, O_RDWR, 0, NULL)) < 0)
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		err(1, "%s", fs);
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	if (pledge("stdio flock rpath cpath wpath", NULL) == -1)
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		err(1, "pledge");
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	for (i = 0; sblock_try[i] != -1; i++) {
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		offset = (off_t)(sblock_try[i]);
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		if (pread(fd, sblock, sizeof(sblock), offset) != sizeof(sblock))
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			err(1, "%s: can't read superblock", fs);
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		sbp = (struct fs *)sblock;
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		if ((sbp->fs_magic == FS_UFS1_MAGIC ||
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		     (sbp->fs_magic == FS_UFS2_MAGIC &&
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		      sbp->fs_sblockloc == sblock_try[i])) &&
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		    sbp->fs_bsize <= MAXBSIZE &&
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		    sbp->fs_bsize >= (int)sizeof(struct fs))
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			break;
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	}
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	if (sblock_try[i] == -1)
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		errx(2, "cannot find file system superblock");
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	bsize = sbp->fs_bsize;
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	/* check that inode numbers are valid */
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	imax = sbp->fs_ncg * sbp->fs_ipg;
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	for (i = 1; i < (argc - 1); i++) {
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		const char *errstr;
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		strtonum(argv[i], 1, imax, &errstr);
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		if (errstr)
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			errx(1, "%s is not a valid inode number: %s", argv[i], errstr);
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	}
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	/* clear the clean flag in the superblock */
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	if (sbp->fs_inodefmt >= FS_44INODEFMT) {
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		sbp->fs_clean = 0;
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		if (pwrite(fd, sblock, sizeof(sblock), offset) != sizeof(sblock))
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			err(1, "%s: can't update superblock", fs);
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		(void)fsync(fd);
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	}
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	/* remaining arguments are inode numbers. */
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	while (*++argv) {
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		/* get the inode number. */
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		inonum = strtonum(*argv, 1, imax, NULL);
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		(void)printf("clearing %u\n", inonum);
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		/* read in the appropriate block. */
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		offset = ino_to_fsba(sbp, inonum);	/* inode to fs blk */
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		offset = fsbtodb(sbp, offset);		/* fs blk disk blk */
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		offset *= DEV_BSIZE;			/* disk blk to bytes */
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		/* seek and read the block */
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		if (pread(fd, ibuf, bsize, offset) != bsize)
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			err(1, "%s", fs);
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		if (sbp->fs_magic == FS_UFS2_MAGIC) {
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			/* get the inode within the block. */
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			dp2 = &(((struct ufs2_dinode *)ibuf)
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			    [ino_to_fsbo(sbp, inonum)]);
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			/* clear the inode, and bump the generation count. */
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			memset(dp2, 0, sizeof(*dp2));
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			dp2->di_gen = arc4random();
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		} else {
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			/* get the inode within the block. */
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			dp1 = &(((struct ufs1_dinode *)ibuf)
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			    [ino_to_fsbo(sbp, inonum)]);
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			/* clear the inode, and bump the generation count. */
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			memset(dp1, 0, sizeof(*dp1));
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			dp1->di_gen = arc4random();
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		}
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		/* backup and write the block */
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		if (pwrite(fd, ibuf, bsize, offset) != bsize)
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			err(1, "%s", fs);
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		(void)fsync(fd);
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	}
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	(void)close(fd);
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	exit(0);
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}