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mount_sysvbfs.c revision 1.3 
      1 /*	$NetBSD: mount_sysvbfs.c,v 1.3 2006/10/16 03:37:43 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 __RCSID("$NetBSD: mount_sysvbfs.c,v 1.3 2006/10/16 03:37:43 christos Exp $");
     40 #endif /* not lint */
     41 
     42 #include <sys/param.h>
     43 #include <sys/mount.h>
     44 
     45 #include <err.h>
     46 #include <errno.h>
     47 #include <stdio.h>
     48 #include <stdlib.h>
     49 
     50 #include <string.h>
     51 #include <unistd.h>
     52 
     53 #include <mntopts.h>
     54 #include <fs/sysvbfs/sysvbfs.h>
     55 
     56 static void	sysvbfs_usage(void);
     57 int	mount_sysvbfs(int argc, char **argv);
     58 
     59 static const struct mntopt mopts[] = {
     60 	MOPT_STDOPTS,
     61 	MOPT_UPDATE,
     62 	MOPT_GETARGS,
     63 	MOPT_NULL,
     64 };
     65 
     66 #ifndef MOUNT_NOMAIN
     67 int
     68 main(int argc, char **argv)
     69 {
     70 
     71 	return mount_sysvbfs(argc, argv);
     72 }
     73 #endif
     74 
     75 int
     76 mount_sysvbfs(int argc, char *argv[])
     77 {
     78 	struct sysvbfs_args args;
     79 	int ch, mntflags;
     80 	char fs_name[MAXPATHLEN], canon_dev[MAXPATHLEN];
     81 	const char *errcause;
     82 	mntoptparse_t mp;
     83 
     84 	mntflags = 0;
     85 	optind = optreset = 1;		/* Reset for parse of new argv. */
     86 	while ((ch = getopt(argc, argv, "o:")) != -1)
     87 		switch (ch) {
     88 		case 'o':
     89 			mp = getmntopts(optarg, mopts, &mntflags, 0);
     90 			if (mp == NULL)
     91 				err(1, "getmntopts");
     92 			freemntopts(mp);
     93 			break;
     94 		case '?':
     95 		default:
     96 			sysvbfs_usage();
     97 		}
     98 	argc -= optind;
     99 	argv += optind;
    100 
    101 	if (argc != 2)
    102 		sysvbfs_usage();
    103 
    104 	if (realpath(argv[0], canon_dev) == NULL)     /* Check device path */
    105 		err(EXIT_FAILURE, "realpath %s", argv[0]);
    106 	if (strncmp(argv[0], canon_dev, MAXPATHLEN)) {
    107 		warnx("\"%s\" is a relative path.", argv[0]);
    108 		warnx("using \"%s\" instead.", canon_dev);
    109 	}
    110         args.fspec = canon_dev;
    111 
    112 	if (realpath(argv[1], fs_name) == NULL)      /* Check mounton path */
    113 		err(EXIT_FAILURE, "realpath %s", argv[1]);
    114 	if (strncmp(argv[1], fs_name, MAXPATHLEN)) {
    115 		warnx("\"%s\" is a relative path.", argv[1]);
    116 		warnx("using \"%s\" instead.", fs_name);
    117 	}
    118 
    119 	if (mount(MOUNT_SYSVBFS, fs_name, mntflags, &args) < 0) {
    120 		switch (errno) {
    121 		case EMFILE:
    122 			errcause = "mount table full";
    123 			break;
    124 		case EINVAL:
    125 			if (mntflags & MNT_UPDATE)
    126 				errcause =
    127 			    "specified device does not match mounted device";
    128 			else
    129 				errcause = "incorrect super block";
    130 			break;
    131 		default:
    132 			errcause = strerror(errno);
    133 			break;
    134 		}
    135 		errx(EXIT_FAILURE, "%s on %s: %s",
    136 		    args.fspec, fs_name, errcause);
    137 	}
    138 	exit(EXIT_SUCCESS);
    139 }
    140 
    141 static void
    142 sysvbfs_usage(void)
    143 {
    144 
    145 	(void)fprintf(stderr, "usage: %s [-o options] special node\n",
    146 	    getprogname());
    147 	exit(EXIT_FAILURE);
    148 }
    149