sbin/mount_ext2fs/mount_ext2fs.c

   1 /*-
   2  * Copyright (c) 1993, 1994
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * @(#) Copyright (c) 1993, 1994 The Regents of the University of California.  All rights reserved.
  30  * @(#)mount_lfs.c      8.3 (Berkeley) 3/27/94
  31  * $FreeBSD: src/sbin/mount_ext2fs/mount_ext2fs.c,v 1.11 1999/10/09 11:54:09 phk Exp $
  32  */
  33
  34 #include <sys/param.h>
  35 #include <sys/mount.h>
  36
  37 #include <err.h>
  38 #include <mntopts.h>
  39 #include <stdio.h>
  40 #include <stdlib.h>
  41 #include <string.h>
  42 #include <sysexits.h>
  43 #include <unistd.h>
  44
  45 #include <vfs/ufs/ufsmount.h>
  46
  47 struct mntopt mopts[] = {
  48         MOPT_STDOPTS,
  49         MOPT_FORCE,
  50         MOPT_SYNC,
  51         MOPT_UPDATE,
  52         MOPT_NULL
  53 };
  54
  55 static void     usage(void) __dead2;
  56
  57 int
  58 main(int argc, char **argv)
  59 {
  60         struct ufs_args args;
  61         int ch, mntflags;
  62         char *fs_name, mntpath[MAXPATHLEN];
  63         struct vfsconf vfc;
  64         int error;
  65
  66         mntflags = 0;
  67         while ((ch = getopt(argc, argv, "o:")) != -1)
  68                 switch (ch) {
  69                 case 'o':
  70                         getmntopts(optarg, mopts, &mntflags, 0);
  71                         break;
  72                 case '?':
  73                 default:
  74                         usage();
  75                 }
  76         argc -= optind;
  77         argv += optind;
  78
  79         if (argc != 2)
  80                 usage();
  81
  82         args.fspec = argv[0];   /* the name of the device file */
  83         fs_name = argv[1];      /* the mount point */
  84
  85         /*
  86          * Resolve the mountpoint with realpath(3) and remove unnecessary
  87          * slashes from the devicename if there are any.
  88          */
  89         checkpath(fs_name, mntpath);
  90         rmslashes(args.fspec, args.fspec);
  91
  92 #define DEFAULT_ROOTUID -2
  93         args.export.ex_root = DEFAULT_ROOTUID;
  94         if (mntflags & MNT_RDONLY)
  95                 args.export.ex_flags = MNT_EXRDONLY;
  96         else
  97                 args.export.ex_flags = 0;
  98
  99         error = getvfsbyname("ext2fs", &vfc);
 100         if (error && vfsisloadable("ext2fs")) {
 101                 if (vfsload("ext2fs")) {
 102                         err(EX_OSERR, "vfsload(ext2fs)");
 103                 }
 104                 endvfsent();    /* flush cache */
 105                 error = getvfsbyname("ext2fs", &vfc);
 106         }
 107         if (error)
 108                 errx(EX_OSERR, "ext2fs filesystem is not available");
 109
 110         if (mount(vfc.vfc_name, mntpath, mntflags, &args) < 0)
 111                 err(EX_OSERR, "%s", args.fspec);
 112         exit(0);
 113 }
 114
 115 void
 116 usage(void)
 117 {
 118         fprintf(stderr,
 119             "usage: mount_ext2fs [-o options] special node\n");
 120         exit(EX_USAGE);
 121 }