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File: [local] / src / sbin / mount_ffs / mount_ffs.c (download)

Revision 1.10, Sat Jun 17 20:23:24 2000 UTC (24 years ago) by niklas
Branch: MAIN
CVS Tags: OPENBSD_2_8_BASE, OPENBSD_2_8
Changes since 1.9: +3 -2 lines

Support the -f flag in order to mount dirty filesystems.  This makes sense
with soft-updates, but will leak free blocks.  On non-softupdates filesystems
this option is strongly unrecommended.  It also allows downgrades to readonly
by revoking files opened for writing.  If the filesystem have mmap'ed files
writeable this is dangerous.  Thus, we do *not* recommend its use!

/*	$OpenBSD: mount_ffs.c,v 1.10 2000/06/17 20:23:24 niklas Exp $	*/
/*	$NetBSD: mount_ffs.c,v 1.3 1996/04/13 01:31:19 jtc Exp $	*/

/*-
 * Copyright (c) 1993, 1994
 *	The Regents of the University of California.  All rights reserved.
 *
 * 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) 1993, 1994\n\
	The Regents of the University of California.  All rights reserved.\n";
#endif /* not lint */

#ifndef lint
#if 0
static char sccsid[] = "@(#)mount_ufs.c	8.2 (Berkeley) 3/27/94";
#else
static char rcsid[] = "$OpenBSD: mount_ffs.c,v 1.10 2000/06/17 20:23:24 niklas Exp $";
#endif
#endif /* not lint */

#include <sys/param.h>
#include <sys/mount.h>

#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "mntopts.h"

void	ffs_usage __P((void));

static const struct mntopt mopts[] = {
	MOPT_STDOPTS,
	MOPT_ASYNC,
	MOPT_SYNC,
	MOPT_UPDATE,
	MOPT_RELOAD,
	MOPT_FORCE,
	{ NULL }
};

int
main(argc, argv)
	int argc;
	char * const argv[];
{
	struct ufs_args args;		/* XXX ffs_args */
	int ch, mntflags;
	char *fs_name, *errcause;

	mntflags = 0;
	optind = optreset = 1;		/* Reset for parse of new argv. */
	while ((ch = getopt(argc, argv, "o:")) != -1)
		switch (ch) {
		case 'o':
			getmntopts(optarg, mopts, &mntflags);
			break;
		case '?':
		default:
			ffs_usage();
		}
	argc -= optind;
	argv += optind;

	if (argc != 2)
		ffs_usage();

        args.fspec = argv[0];		/* The name of the device file. */
	fs_name = argv[1];		/* The mount point. */

#define DEFAULT_ROOTUID	-2
	args.export.ex_root = DEFAULT_ROOTUID;
	if (mntflags & MNT_RDONLY)
		args.export.ex_flags = MNT_EXRDONLY;
	else
		args.export.ex_flags = 0;

	if (mount(MOUNT_FFS, fs_name, mntflags, &args) < 0) {
		switch (errno) {
		case EMFILE:
			errcause = "mount table full";
			break;
		case EINVAL:
			errcause =
			    "specified device does not match mounted device";
			break;
		case EOPNOTSUPP:
			errcause = "filesystem not supported by kernel";
			break;
		default:
			errcause = strerror(errno);
			break;
		}
		errx(1, "%s on %s: %s", args.fspec, fs_name, errcause);
	}
	exit(0);
}

void
ffs_usage()
{
	(void)fprintf(stderr, "usage: mount_ffs [-o options] special node\n");
	exit(1);
}