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. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. 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) 1993, 1994 The Regents of the University of California.  All rights reserved.
  34  * @(#)mount_lfs.c      8.3 (Berkeley) 3/27/94
  35  * $FreeBSD: src/sbin/mount_ext2fs/mount_ext2fs.c,v 1.11 1999/10/09 11:54:09 phk Exp $
  36  * $DragonFly: src/sbin/mount_ext2fs/mount_ext2fs.c,v 1.7 2005/04/03 17:46:43 joerg Exp $
  37  */
  38
  39 #include <sys/param.h>
  40 #include <sys/mount.h>
  41
  42 #include <err.h>
  43 #include <stdio.h>
  44 #include <stdlib.h>
  45 #include <string.h>
  46 #include <sysexits.h>
  47 #include <unistd.h>
  48
  49 #include <vfs/ufs/ufsmount.h>
  50
  51 #include "mntopts.h"
  52
  53 struct mntopt mopts[] = {
  54         MOPT_STDOPTS,
  55         MOPT_FORCE,
  56         MOPT_SYNC,
  57         MOPT_UPDATE,
  58         MOPT_NULL
  59 };
  60
  61 static void     usage(void) __dead2;
  62
  63 int
  64 main(int argc, char **argv)
  65 {
  66         struct ufs_args args;
  67         int ch, mntflags;
  68         char *fs_name, *options, mntpath[MAXPATHLEN];
  69         struct vfsconf vfc;
  70         int error;
  71
  72         options = NULL;
  73         mntflags = 0;
  74         while ((ch = getopt(argc, argv, "o:")) != -1)
  75                 switch (ch) {
  76                 case 'o':
  77                         getmntopts(optarg, mopts, &mntflags, 0);
  78                         break;
  79                 case '?':
  80                 default:
  81                         usage();
  82                 }
  83         argc -= optind;
  84         argv += optind;
  85
  86         if (argc != 2)
  87                 usage();
  88
  89         args.fspec = argv[0];   /* the name of the device file */
  90         fs_name = argv[1];      /* the mount point */
  91
  92         /*
  93          * Resolve the mountpoint with realpath(3) and remove unnecessary
  94          * slashes from the devicename if there are any.
  95          */
  96         checkpath(fs_name, mntpath);
  97         rmslashes(args.fspec, args.fspec);
  98
  99 #define DEFAULT_ROOTUID -2
 100         args.export.ex_root = DEFAULT_ROOTUID;
 101         if (mntflags & MNT_RDONLY)
 102                 args.export.ex_flags = MNT_EXRDONLY;
 103         else
 104                 args.export.ex_flags = 0;
 105
 106         error = getvfsbyname("ext2fs", &vfc);
 107         if (error && vfsisloadable("ext2fs")) {
 108                 if (vfsload("ext2fs")) {
 109                         err(EX_OSERR, "vfsload(ext2fs)");
 110                 }
 111                 endvfsent();    /* flush cache */
 112                 error = getvfsbyname("ext2fs", &vfc);
 113         }
 114         if (error)
 115                 errx(EX_OSERR, "ext2fs filesystem is not available");
 116
 117         if (mount(vfc.vfc_name, mntpath, mntflags, &args) < 0)
 118                 err(EX_OSERR, "%s", args.fspec);
 119         exit(0);
 120 }
 121
 122 void
 123 usage(void)
 124 {
 125         fprintf(stderr,
 126             "usage: mount_ext2fs [-o options] special node\n");
 127         exit(EX_USAGE);
 128 }