File: [local] / src / sbin / mount_msdos / mount_msdos.c (download)
Revision 1.18, Thu Jul 3 22:41:40 2003 UTC (20 years, 11 months ago) by tedu
Branch: MAIN
CVS Tags: OPENBSD_3_7_BASE, OPENBSD_3_7, OPENBSD_3_6_BASE, OPENBSD_3_6, OPENBSD_3_5_BASE, OPENBSD_3_5, OPENBSD_3_4_BASE, OPENBSD_3_4 Changes since 1.17: +5 -13 lines
use realpath() in helpers instead of doing it ourselves every time.
also fixes pr1662. from otto moerbeek
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/* $OpenBSD: mount_msdos.c,v 1.18 2003/07/03 22:41:40 tedu 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.
*/
#ifndef lint
static char rcsid[] = "$OpenBSD: mount_msdos.c,v 1.18 2003/07/03 22:41:40 tedu 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 <errno.h>
#include "mntopts.h"
const struct mntopt mopts[] = {
MOPT_STDOPTS,
MOPT_UPDATE,
{ 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[MAXPATHLEN];
char *errcause;
mntflags = set_gid = set_uid = set_mask = 0;
(void)memset(&args, '\0', sizeof(args));
while ((c = getopt(argc, argv, "Gsl9xu:g:m:o:")) != -1) {
switch (c) {
case 'G':
args.flags |= MSDOSFSMNT_GEMDOSFS;
break;
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", dir);
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;
char *gname;
gid_t gid;
if ((gr = getgrnam(s)) != NULL)
gid = gr->gr_gid;
else {
for (gname = s; *s && isdigit(*s); ++s);
if (!*s)
gid = atoi(gname);
else
errx(1, "unknown group id: %s", gname);
}
return (gid);
}
uid_t
a_uid(char *s)
{
struct passwd *pw;
char *uname;
uid_t uid;
if ((pw = getpwnam(s)) != NULL)
uid = pw->pw_uid;
else {
for (uname = s; *s && isdigit(*s); ++s);
if (!*s)
uid = atoi(uname);
else
errx(1, "unknown user id: %s", uname);
}
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 [-o options] [-u user] [-g group] [-m mask] bdev dir\n");
exit(1);
}