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. All advertising materials mentioning features or use of this software
  18  *    must display the following acknowledgement:
  19  *      This product includes software developed by the University of
  20  *      California, Berkeley and its contributors.
  21  * 4. Neither the name of the University nor the names of its contributors
  22  *    may be used to endorse or promote products derived from this software
  23  *    without specific prior written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  28  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  35  * SUCH DAMAGE.
  36  *
  37  * @(#) Copyright (c) 1992, 1993, 1994 The Regents of the University of California.  All rights reserved.
  38  * $FreeBSD: src/sbin/mount_std/mount_std.c,v 1.10.2.1 2001/07/30 10:30:07 dd Exp $
  39  * $DragonFly: src/sbin/mount_std/mount_std.c,v 1.5 2004/12/18 21:43:39 swildner Exp $
  40  */
  41
  42 #include <sys/param.h>
  43 #include <sys/mount.h>
  44
  45 #include <err.h>
  46 #include <stdio.h>
  47 #include <stdlib.h>
  48 #include <string.h>
  49 #include <sysexits.h>
  50 #include <unistd.h>
  51
  52 #include "mntopts.h"
  53
  54 static struct mntopt mopts[] = {
  55         MOPT_STDOPTS,
  56         { .m_option = NULL }
  57 };
  58
  59 static void     usage(void) __dead2;
  60 static const char *fsname;
  61
  62 int
  63 main(int argc, char **argv)
  64 {
  65         int ch, mntflags;
  66         char mntpath[MAXPATHLEN];
  67         struct vfsconf vfc;
  68         int error;
  69
  70         /*
  71          * XXX
  72          * mount(8) calls the mount programs with an argv[0] which is
  73          * /just/ the filesystem name.  So, if there is no underscore
  74          * in argv[0], we assume that we are being called from mount(8)
  75          * and that argv[0] is thus the name of the filesystem type.
  76          */
  77         fsname = strrchr(argv[0], '_');
  78         if (fsname) {
  79                 if (strcmp(fsname, "_std") == 0)
  80                         errx(EX_USAGE, "argv[0] must end in _fsname");
  81                 fsname++;
  82         } else {
  83                 fsname = argv[0];
  84         }
  85
  86         mntflags = 0;
  87         while ((ch = getopt(argc, argv, "o:")) != -1)
  88                 switch (ch) {
  89                 case 'o':
  90                         getmntopts(optarg, mopts, &mntflags, 0);
  91                         break;
  92                 case '?':
  93                 default:
  94                         usage();
  95                 }
  96         argc -= optind;
  97         argv += optind;
  98
  99         if (argc != 2)
 100                 usage();
 101
 102         error = getvfsbyname(fsname, &vfc);
 103         if (error && vfsisloadable(fsname)) {
 104                 if(vfsload(fsname))
 105                         err(EX_OSERR, "vfsload(%s)", fsname);
 106                 endvfsent();
 107                 error = getvfsbyname(fsname, &vfc);
 108         }
 109         if (error)
 110                 errx(EX_OSERR, "%s filesystem not available", fsname);
 111
 112         /* resolve the mountpoint with realpath(3) */
 113         checkpath(argv[1], mntpath);
 114
 115         if (mount(vfc.vfc_name, mntpath, mntflags, NULL))
 116                 err(EX_OSERR, NULL);
 117         exit(0);
 118 }
 119
 120 void
 121 usage(void)
 122 {
 123         fprintf(stderr,
 124             "usage: mount_%s [-o options] what_to_mount mount_point\n", fsname);
 125         exit(EX_USAGE);
 126 }