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      1 /*	$NetBSD: mount_sysvbfs.c,v 1.8 2011/08/29 14:35:02 joerg 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\
     35  The Regents of the University of California.  All rights reserved.");
     36 #endif /* not lint */
     37 
     38 #ifndef lint
     39 __RCSID("$NetBSD: mount_sysvbfs.c,v 1.8 2011/08/29 14:35:02 joerg 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 
     55 #include "mountprog.h"
     56 #include "mount_sysvbfs.h"
     57 
     58 static const struct mntopt mopts[] = {
     59 	MOPT_STDOPTS,
     60 	MOPT_UPDATE,
     61 	MOPT_GETARGS,
     62 	MOPT_NULL,
     63 };
     64 
     65 __dead static void
     66 sysvbfs_usage(void)
     67 {
     68 
     69 	(void)fprintf(stderr, "usage: %s [-o options] special node\n",
     70 	    getprogname());
     71 	exit(EXIT_FAILURE);
     72 }
     73 
     74 #ifndef MOUNT_NOMAIN
     75 int
     76 main(int argc, char **argv)
     77 {
     78 
     79 	return mount_sysvbfs(argc, argv);
     80 }
     81 #endif
     82 
     83 void
     84 mount_sysvbfs_parseargs(int argc, char **argv,
     85 	struct sysvbfs_args *args, int *mntflags,
     86 	char *canon_dev, char *canon_dir)
     87 {
     88 	int ch;
     89 	mntoptparse_t mp;
     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 			mp = getmntopts(optarg, mopts, mntflags, 0);
     97 			if (mp == NULL)
     98 				err(1, "getmntopts");
     99 			freemntopts(mp);
    100 			break;
    101 		case '?':
    102 		default:
    103 			sysvbfs_usage();
    104 		}
    105 	argc -= optind;
    106 	argv += optind;
    107 
    108 	if (argc != 2)
    109 		sysvbfs_usage();
    110 
    111 	pathadj(argv[0], canon_dev);
    112 	args->fspec = canon_dev;
    113 	pathadj(argv[1], canon_dir);
    114 }
    115 
    116 int
    117 mount_sysvbfs(int argc, char *argv[])
    118 {
    119 	struct sysvbfs_args args;
    120 	char canon_dev[MAXPATHLEN], canon_dir[MAXPATHLEN];
    121 	const char *errcause;
    122 	int mntflags;
    123 
    124 	mount_sysvbfs_parseargs(argc, argv, &args, &mntflags,
    125 	    canon_dev, canon_dir);
    126 
    127 	if (mount(MOUNT_SYSVBFS, canon_dir, mntflags, &args, sizeof args)==-1) {
    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(EXIT_FAILURE, "%s on %s: %s",
    144 		    canon_dev, canon_dir, errcause);
    145 	}
    146 	exit(EXIT_SUCCESS);
    147 }
    148