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mount_ext2fs.c revision 1.13 
      1 /*	$NetBSD: mount_ext2fs.c,v 1.13 2005/02/05 14:51:16 xtraeme 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 1.13 2005/02/05 14:51:16 xtraeme 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 	{ 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 
     91 	mntflags = 0;
     92 	optind = optreset = 1;		/* Reset for parse of new argv. */
     93 	while ((ch = getopt(argc, argv, "o:")) != -1)
     94 		switch (ch) {
     95 		case 'o':
     96 			getmntopts(optarg, mopts, &mntflags, 0);
     97 			break;
     98 		case '?':
     99 		default:
    100 			ext2fs_usage();
    101 		}
    102 	argc -= optind;
    103 	argv += optind;
    104 
    105 	if (argc != 2)
    106 		ext2fs_usage();
    107 
    108 	if (realpath(argv[0], canon_dev) == NULL)     /* Check device path */
    109 		err(1, "realpath %s", argv[0]);
    110 	if (strncmp(argv[0], canon_dev, MAXPATHLEN)) {
    111 		warnx("\"%s\" is a relative path.", argv[0]);
    112 		warnx("using \"%s\" instead.", canon_dev);
    113 	}
    114 	args.fspec = canon_dev;
    115 
    116 	if (realpath(argv[1], fs_name) == NULL)       /* Check mounton path */
    117 		err(1, "realpath %s", argv[1]);
    118 	if (strncmp(argv[1], fs_name, MAXPATHLEN)) {
    119 		warnx("\"%s\" is a relative path.", argv[1]);
    120 		warnx("using \"%s\" instead.", fs_name);
    121 	}
    122 
    123 #define DEFAULT_ROOTUID	-2
    124 	args.export.ex_root = DEFAULT_ROOTUID;
    125 	if (mntflags & MNT_RDONLY)
    126 		args.export.ex_flags = MNT_EXRDONLY;
    127 	else
    128 		args.export.ex_flags = 0;
    129 
    130 	if (mount(MOUNT_EXT2FS, fs_name, mntflags, &args) < 0) {
    131 		switch (errno) {
    132 		case EMFILE:
    133 			errcause = "mount table full";
    134 			break;
    135 		case EINVAL:
    136 			if (mntflags & MNT_UPDATE)
    137 				errcause =
    138 			    "specified device does not match mounted device";
    139 			else
    140 				errcause = "incorrect super block";
    141 			break;
    142 		default:
    143 			errcause = strerror(errno);
    144 			break;
    145 		}
    146 		errx(1, "%s on %s: %s", args.fspec, fs_name, errcause);
    147 	}
    148 	exit(0);
    149 }
    150 
    151 static void
    152 ext2fs_usage(void)
    153 {
    154 	(void)fprintf(stderr,
    155 		"usage: mount_ext2fs [-o options] special node\n");
    156 	exit(1);
    157 }
    158