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/* $OpenBSD: mount_msdos.c,v 1.30 2015/04/18 18:28:37 deraadt Exp $ */
/* $NetBSD: mount_msdos.c,v 1.16 1996/10/24 00:12:50 cgd 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 by Christopher G. Demetriou.
* 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.
*/
#include <sys/types.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 <limits.h>
#include <errno.h>
#include "mntopts.h"
const struct mntopt mopts[] = {
MOPT_STDOPTS,
MOPT_UPDATE,
MOPT_ASYNC,
{ NULL }
};
gid_t a_gid(char *);
uid_t a_uid(char *);
mode_t a_mask(char *);
void usage(void);
int
main(int argc, char **argv)
{
struct msdosfs_args args;
struct stat sb;
int c, mntflags, set_gid, set_uid, set_mask;
char *dev, dir[PATH_MAX];
char *errcause;
mntflags = set_gid = set_uid = set_mask = 0;
(void)memset(&args, '\0', sizeof(args));
while ((c = getopt(argc, argv, "sl9xu:g:m:o:")) != -1) {
switch (c) {
case 's':
args.flags |= MSDOSFSMNT_SHORTNAME;
break;
case 'l':
args.flags |= MSDOSFSMNT_LONGNAME;
break;
case '9':
args.flags |= MSDOSFSMNT_NOWIN95;
break;
case 'x':
args.flags |= MSDOSFSMNT_ALLOWDIRX;
break;
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);
break;
case '?':
default:
usage();
break;
}
}
if (optind + 2 != argc)
usage();
dev = argv[optind];
if (realpath(argv[optind + 1], dir) == NULL)
err(1, "realpath %s", argv[optind + 1]);
args.fspec = dev;
args.export_info.ex_root = -2; /* unchecked anyway on DOS fs */
if (mntflags & MNT_RDONLY)
args.export_info.ex_flags = MNT_EXRDONLY;
else
args.export_info.ex_flags = 0;
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_MSDOS, dir, mntflags, &args) < 0) {
switch (errno) {
case EOPNOTSUPP:
errcause = "filesystem not supported by kernel";
break;
case EMFILE:
errcause = "mount table full";
break;
case EINVAL:
errcause =
"not an MSDOS filesystem";
break;
default:
errcause = strerror(errno);
break;
}
errx(1, "%s on %s: %s", args.fspec, dir, errcause);
}
exit (0);
}
gid_t
a_gid(char *s)
{
struct group *gr;
const char *errstr;
char *gname;
gid_t gid;
if ((gr = getgrnam(s)) != NULL)
return gr->gr_gid;
gid = strtonum(s, 0, GID_MAX, &errstr);
if (errstr)
errx(1, "group is %s: %s", errstr, s);
return (gid);
}
uid_t
a_uid(char *s)
{
struct passwd *pw;
const char *errstr;
char *uname;
uid_t uid;
if ((pw = getpwnam(s)) != NULL)
return pw->pw_uid;
uid = strtonum(s, 0, UID_MAX, &errstr);
if (errstr)
errx(1, "user is %s: %s", errstr, s);
return (uid);
}
mode_t
a_mask(char *s)
{
int done, rv;
char *ep;
done = 0;
if (*s >= '0' && *s <= '7') {
done = 1;
rv = strtol(optarg, &ep, 8);
}
if (!done || rv < 0 || *ep)
errx(1, "invalid file mode: %s", s);
return (rv);
}
void
usage(void)
{
fprintf(stderr,
"usage: mount_msdos [-9lsx] [-g gid] [-m mask] [-o options] [-u uid] special node\n");
exit(1);
}
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