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mount_ext2fs.c revision 1.17 
      1 /*	$NetBSD: mount_ext2fs.c,v 1.17 2006/10/16 03:37:42 christos Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1993, 1994
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 #ifndef lint
     34 __COPYRIGHT("@(#) Copyright (c) 1993, 1994\n\
     35 	The Regents of the University of California.  All rights reserved.\n");
     36 #endif /* not lint */
     37 
     38 #ifndef lint
     39 #if 0
     40 static char sccsid[] = "@(#)mount_ufs.c	8.4 (Berkeley) 4/26/95";
     41 #else
     42 __RCSID("$NetBSD: mount_ext2fs.c,v 1.17 2006/10/16 03:37:42 christos Exp $");
     43 #endif
     44 #endif /* not lint */
     45 
     46 #include <sys/param.h>
     47 #include <sys/mount.h>
     48 #include <ufs/ufs/ufsmount.h>
     49 
     50 #include <err.h>
     51 #include <errno.h>
     52 #include <stdio.h>
     53 #include <stdlib.h>
     54 
     55 #include <string.h>
     56 #include <unistd.h>
     57 
     58 #include <mntopts.h>
     59 
     60 static void	ext2fs_usage(void);
     61 int	mount_ext2fs(int argc, char **argv);
     62 
     63 static const struct mntopt mopts[] = {
     64 	MOPT_STDOPTS,
     65 	MOPT_ASYNC,
     66 	MOPT_SYNC,
     67 	MOPT_UPDATE,
     68 	MOPT_RELOAD,
     69 	MOPT_FORCE,
     70 	MOPT_GETARGS,
     71 	MOPT_NODEVMTIME,
     72 	MOPT_NULL,
     73 };
     74 
     75 #ifndef MOUNT_NOMAIN
     76 int
     77 main(int argc, char *argv[])
     78 {
     79 	return mount_ext2fs(argc, argv);
     80 }
     81 #endif
     82 
     83 int
     84 mount_ext2fs(int argc, char *argv[])
     85 {
     86 	struct ufs_args args;		/* XXX ffs_args */
     87 	int ch, mntflags;
     88 	char fs_name[MAXPATHLEN], canon_dev[MAXPATHLEN];
     89 	const char *errcause;
     90 	mntoptparse_t mp;
     91 
     92 	mntflags = 0;
     93 	optind = optreset = 1;		/* Reset for parse of new argv. */
     94 	while ((ch = getopt(argc, argv, "o:")) != -1)
     95 		switch (ch) {
     96 		case 'o':
     97 			mp = getmntopts(optarg, mopts, &mntflags, 0);
     98 			if (mp == NULL)
     99 				err(1, "getmntopts");
    100 			freemntopts(mp);
    101 			break;
    102 		case '?':
    103 		default:
    104 			ext2fs_usage();
    105 		}
    106 	argc -= optind;
    107 	argv += optind;
    108 
    109 	if (argc != 2)
    110 		ext2fs_usage();
    111 
    112 	if (realpath(argv[0], canon_dev) == NULL)     /* Check device path */
    113 		err(1, "realpath %s", argv[0]);
    114 	if (strncmp(argv[0], canon_dev, MAXPATHLEN)) {
    115 		warnx("\"%s\" is a relative path.", argv[0]);
    116 		warnx("using \"%s\" instead.", canon_dev);
    117 	}
    118 	args.fspec = canon_dev;
    119 
    120 	if (realpath(argv[1], fs_name) == NULL)       /* Check mounton path */
    121 		err(1, "realpath %s", argv[1]);
    122 	if (strncmp(argv[1], fs_name, MAXPATHLEN)) {
    123 		warnx("\"%s\" is a relative path.", argv[1]);
    124 		warnx("using \"%s\" instead.", fs_name);
    125 	}
    126 
    127 	if (mount(MOUNT_EXT2FS, fs_name, mntflags, &args) < 0) {
    128 		switch (errno) {
    129 		case EMFILE:
    130 			errcause = "mount table full";
    131 			break;
    132 		case EINVAL:
    133 			if (mntflags & MNT_UPDATE)
    134 				errcause =
    135 			    "specified device does not match mounted device";
    136 			else
    137 				errcause = "incorrect super block";
    138 			break;
    139 		default:
    140 			errcause = strerror(errno);
    141 			break;
    142 		}
    143 		errx(1, "%s on %s: %s", args.fspec, fs_name, errcause);
    144 	}
    145 	exit(0);
    146 }
    147 
    148 static void
    149 ext2fs_usage(void)
    150 {
    151 	(void)fprintf(stderr,
    152 		"usage: mount_ext2fs [-o options] special node\n");
    153 	exit(1);
    154 }
    155