sbin/mount_filecore/mount_filecore.c

   1 /* $NetBSD: mount_filecore.c,v 1.18 2008/07/20 01:20:22 lukem Exp $ */
   2
   3 /*
   4  * Copyright (c) 1992, 1993, 1994 The Regents of the University of California.
   5  * All rights reserved.
   6  *
   7  * This code is contains code contributed to the NetBSD project by
   8  * Christopher G. Demetriou
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  *      mount_filecore.c        1.1     1998/6/26
  35  */
  36
  37 /*
  38  * Copyright (c) 1998 Andrew McMurry
  39  *
  40  * This code is contains code contributed to the NetBSD project by
  41  * Christopher G. Demetriou
  42  *
  43  * Redistribution and use in source and binary forms, with or without
  44  * modification, are permitted provided that the following conditions
  45  * are met:
  46  * 1. Redistributions of source code must retain the above copyright
  47  *    notice, this list of conditions and the following disclaimer.
  48  * 2. Redistributions in binary form must reproduce the above copyright
  49  *    notice, this list of conditions and the following disclaimer in the
  50  *    documentation and/or other materials provided with the distribution.
  51  * 3. All advertising materials mentioning features or use of this software
  52  *    must display the following acknowledgement:
  53  *      This product includes software developed by the University of
  54  *      California, Berkeley and its contributors.
  55  * 4. Neither the name of the University nor the names of its contributors
  56  *    may be used to endorse or promote products derived from this software
  57  *    without specific prior written permission.
  58  *
  59  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  60  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  61  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  62  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  63  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  64  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  65  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  66  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  67  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  68  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  69  * SUCH DAMAGE.
  70  *
  71  *      mount_filecore.c        1.1     1998/6/26
  72  */
  73
  74 #include <sys/cdefs.h>
  75 #ifndef lint
  76 __COPYRIGHT("@(#) Copyright (c) 1992, 1993, 1994\
  77  The Regents of the University of California.\
  78   Copyright (c) 1998 Andrew McMurry.  All rights reserved.");
  79 #endif /* not lint */
  80
  81 #include <sys/param.h>
  82 #include <sys/mount.h>
  83
  84 #include <err.h>
  85 #include <grp.h>
  86 #include <pwd.h>
  87 #include <stdlib.h>
  88 #include <stdio.h>
  89 #include <string.h>
  90 #include <unistd.h>
  91 #include <util.h>
  92
  93 #include <filecorefs/filecore_mount.h>
  94
  95 #include <mntopts.h>
  96
  97 #include "mountprog.h"
  98
  99 static const struct mntopt mopts[] = {
 100         MOPT_STDOPTS,
 101         MOPT_UPDATE,
 102         MOPT_GETARGS,
 103         MOPT_NULL,
 104 };
 105
 106 int     mount_filecore(int argc, char **argv);
 107 static void     usage(void);
 108
 109 #ifndef MOUNT_NOMAIN
 110 int
 111 main(int argc, char **argv)
 112 {
 113         return mount_filecore(argc, argv);
 114 }
 115 #endif
 116
 117 int
 118 mount_filecore(int argc, char **argv)
 119 {
 120         struct filecore_args args;
 121         int ch, mntflags, opts, useuid;
 122         char *dev, *dir, canon_dev[MAXPATHLEN], canon_dir[MAXPATHLEN];
 123         mntoptparse_t mp;
 124
 125         mntflags = opts = 0;
 126         useuid = 1;
 127         args.uid = 0;
 128         args.gid = 0;
 129
 130         while ((ch = getopt(argc, argv, "anRfu:g:o:")) != -1)
 131                 switch (ch) {
 132                 case 'a':
 133                         args.flags |= FILECOREMNT_ALLACCESS;
 134                         break;
 135                 case 'n':
 136                         args.flags |= FILECOREMNT_OWNACCESS;
 137                         break;
 138                 case 'R':
 139                         args.flags |= FILECOREMNT_OWNREAD;
 140                         break;
 141                 case 'f':
 142                         args.flags |= FILECOREMNT_FILETYPE;
 143                         break;
 144                 case 'u':
 145                         args.uid = a_uid(optarg);
 146                         useuid = 0;
 147                         break;
 148                 case 'g':
 149                         args.gid = a_gid(optarg);
 150                         useuid = 0;
 151                         break;
 152                 case 'o':
 153                         mp = getmntopts(optarg, mopts, &mntflags, 0);
 154                         if (mp == NULL)
 155                                 err(1, "getmntopts");
 156                         freemntopts(mp);
 157                         break;
 158                 case '?':
 159                 default:
 160                         usage();
 161                 }
 162         argc -= optind;
 163         argv += optind;
 164
 165         if (argc != 2)
 166                 usage();
 167
 168         dev = argv[0];
 169         dir = argv[1];
 170
 171         if (realpath(dev, canon_dev) == NULL)        /* Check device path */
 172                 err(1, "realpath %s", dev);
 173         if (strncmp(dev, canon_dev, MAXPATHLEN)) {
 174                 warnx("\"%s\" is a relative path.", dev);
 175                 dev = canon_dev;
 176                 warnx("using \"%s\" instead.", dev);
 177         }
 178
 179         if (realpath(dir, canon_dir) == NULL)        /* Check mounton path */
 180                 err(1, "realpath %s", dir);
 181         if (strncmp(dir, canon_dir, MAXPATHLEN)) {
 182                 warnx("\"%s\" is a relative path.", dir);
 183                 dir = canon_dir;
 184                 warnx("using \"%s\" instead.", dir);
 185         }
 186
 187 #define DEFAULT_ROOTUID -2
 188         /*
 189          * FILECORE filesystems are not writable.
 190          */
 191         mntflags |= MNT_RDONLY;
 192         if (useuid) args.flags |= FILECOREMNT_USEUID;
 193         args.fspec = dev;
 194         args.flags = opts;
 195
 196         if (mount(MOUNT_FILECORE, dir, mntflags, &args, sizeof args) == -1)
 197                 err(1, "%s on %s", dev, dir);
 198         if (mntflags & MNT_GETARGS) {
 199                 char buf[1024];
 200                 (void)snprintb(buf, sizeof(buf), FILECOREMNT_BITS, args.flags);
 201                 printf("uid=%d, gid=%d, flags=%s\n", args.uid, args.gid, buf);
 202         }
 203         exit(0);
 204 }
 205
 206 static void
 207 usage(void)
 208 {
 209         (void)fprintf(stderr,
 210                 "usage: mount_filecore [-afnR] [-g gid] [-o options] [-u uid] special node\n");
 211         exit(1);
 212 }