sbin/mount_sysvbfs/mount_sysvbfs.c

   1 /*      $NetBSD: mount_sysvbfs.c,v 1.6 2008/07/20 01:20:22 lukem 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 1.6 2008/07/20 01:20:22 lukem 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 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 }