sbin/mount_std/mount_std.c

   1 /*
   2  * Copyright (c) 1990, 1992 Jan-Simon Pendry
   3  * Copyright (c) 1992, 1993, 1994
   4  *      The Regents of the University of California.  All rights reserved.
   5  *
   6  * This code is derived from software contributed to Berkeley by
   7  * Jan-Simon Pendry.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * @(#) Copyright (c) 1992, 1993, 1994 The Regents of the University of California.  All rights reserved.
  34  * $FreeBSD: src/sbin/mount_std/mount_std.c,v 1.10.2.1 2001/07/30 10:30:07 dd Exp $
  35  */
  36
  37 #include <sys/param.h>
  38 #include <sys/mount.h>
  39
  40 #include <err.h>
  41 #include <mntopts.h>
  42 #include <stdio.h>
  43 #include <stdlib.h>
  44 #include <string.h>
  45 #include <sysexits.h>
  46 #include <unistd.h>
  47
  48 static struct mntopt mopts[] = {
  49         MOPT_STDOPTS,
  50         { .m_option = NULL }
  51 };
  52
  53 static void     usage(void) __dead2;
  54 static const char *fsname;
  55
  56 int
  57 main(int argc, char **argv)
  58 {
  59         int ch, mntflags;
  60         char mntpath[MAXPATHLEN];
  61         struct vfsconf vfc;
  62         int error;
  63
  64         /*
  65          * XXX
  66          * mount(8) calls the mount programs with an argv[0] which is
  67          * /just/ the filesystem name.  So, if there is no underscore
  68          * in argv[0], we assume that we are being called from mount(8)
  69          * and that argv[0] is thus the name of the filesystem type.
  70          */
  71         fsname = strrchr(argv[0], '_');
  72         if (fsname) {
  73                 if (strcmp(fsname, "_std") == 0)
  74                         errx(EX_USAGE, "argv[0] must end in _fsname");
  75                 fsname++;
  76         } else {
  77                 fsname = argv[0];
  78         }
  79
  80         mntflags = 0;
  81         while ((ch = getopt(argc, argv, "o:")) != -1)
  82                 switch (ch) {
  83                 case 'o':
  84                         getmntopts(optarg, mopts, &mntflags, 0);
  85                         break;
  86                 case '?':
  87                 default:
  88                         usage();
  89                 }
  90         argc -= optind;
  91         argv += optind;
  92
  93         if (argc != 2)
  94                 usage();
  95
  96         error = getvfsbyname(fsname, &vfc);
  97         if (error && vfsisloadable(fsname)) {
  98                 if(vfsload(fsname))
  99                         err(EX_OSERR, "vfsload(%s)", fsname);
 100                 endvfsent();
 101                 error = getvfsbyname(fsname, &vfc);
 102         }
 103         if (error)
 104                 errx(EX_OSERR, "%s filesystem not available", fsname);
 105
 106         /* resolve the mountpoint with realpath(3) */
 107         checkpath(argv[1], mntpath);
 108
 109         if (mount(vfc.vfc_name, mntpath, mntflags, NULL))
 110                 err(EX_OSERR, NULL);
 111         exit(0);
 112 }
 113
 114 void
 115 usage(void)
 116 {
 117         fprintf(stderr,
 118             "usage: mount_%s [-o options] what_to_mount mount_point\n", fsname);
 119         exit(EX_USAGE);
 120 }