NetBSD/sbin/mount_ados/mount_ados.c

173 lines
4.5 KiB
C

/* $NetBSD: mount_ados.c,v 1.20 2005/09/23 12:10:34 jmmv Exp $ */
/*
* Copyright (c) 1994 Christopher G. Demetriou
* 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 for the
* NetBSD Project. See http://www.NetBSD.org/ for
* information about NetBSD.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*
* <<Id: LICENSE,v 1.2 2000/06/14 15:57:33 cgd Exp>>
*/
#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: mount_ados.c,v 1.20 2005/09/23 12:10:34 jmmv Exp $");
#endif /* not lint */
#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <ctype.h>
#include <err.h>
#include <grp.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <adosfs/adosfs.h>
#include <mntopts.h>
#include <errno.h>
#include <fattr.h>
static const struct mntopt mopts[] = {
MOPT_STDOPTS,
MOPT_GETARGS,
{ NULL }
};
int mount_ados(int argc, char **argv);
static void usage(void);
#ifndef MOUNT_NOMAIN
int
main(int argc, char **argv)
{
return mount_ados(argc, argv);
}
#endif
int
mount_ados(int argc, char **argv)
{
struct adosfs_args args;
struct stat sb;
int c, mntflags, set_gid, set_uid, set_mask;
char *dev, *dir, canon_dir[MAXPATHLEN], canon_dev[MAXPATHLEN];
mntflags = set_gid = set_uid = set_mask = 0;
(void)memset(&args, '\0', sizeof(args));
while ((c = getopt(argc, argv, "u:g:m:o:")) != -1) {
switch (c) {
case 'u':
args.uid = a_uid(optarg);
set_uid = 1;
break;
case 'g':
args.gid = a_gid(optarg);
set_gid = 1;
break;
case 'm':
args.mask = a_mask(optarg);
set_mask = 1;
break;
case 'o':
getmntopts(optarg, mopts, &mntflags, 0);
break;
case '?':
default:
usage();
break;
}
}
if (optind + 2 != argc)
usage();
dev = argv[optind];
dir = argv[optind + 1];
if (realpath(dev, canon_dev) == NULL) /* Check device path */
err(1, "realpath %s", dev);
if (strncmp(dev, canon_dev, MAXPATHLEN)) {
warnx("\"%s\" is a relative path.", dev);
dev = canon_dev;
warnx("using \"%s\" instead.", dev);
}
if (realpath(dir, canon_dir) == NULL) /* Check mounton path */
err(1, "realpath %s", dir);
if (strncmp(dir, canon_dir, MAXPATHLEN)) {
warnx("\"%s\" is a relative path.", dir);
dir = canon_dir;
warnx("using \"%s\" instead.", dir);
}
args.fspec = dev;
if (!set_gid || !set_uid || !set_mask) {
if (stat(dir, &sb) == -1)
err(1, "stat %s", dir);
if (!set_uid)
args.uid = sb.st_uid;
if (!set_gid)
args.gid = sb.st_gid;
if (!set_mask)
args.mask = sb.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO);
}
if (mount(MOUNT_ADOSFS, dir, mntflags, &args) >= 0)
exit (0);
if (errno != EROFS)
err(1, "%s on %s", dev, dir);
mntflags |= MNT_RDONLY;
if (mount(MOUNT_ADOSFS, dir, mntflags, &args) == -1)
err(1, "%s on %s", dev, dir);
if (mntflags & MNT_GETARGS)
printf("uid=%d, gid=%d, mask=0%o\n", args.uid, args.gid,
args.mask);
exit (0);
}
static void
usage(void)
{
fprintf(stderr, "usage: mount_ados [-o options] [-u user] [-g group] [-m mask] bdev dir\n");
exit(1);
}