sbin/mount_msdos/mount_msdos.c

   1 /* $NetBSD: mount_msdos.c,v 1.46 2008/08/05 20:57:45 pooka Exp $ */
   2
   3 /*
   4  * Copyright (c) 1994 Christopher G. Demetriou
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *          This product includes software developed for the
  18  *          NetBSD Project.  See http://www.NetBSD.org/ for
  19  *          information about NetBSD.
  20  * 4. The name of the author may not be used to endorse or promote products
  21  *    derived from this software without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  24  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  25  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  26  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  27  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  28  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  29  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  30  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  31  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  32  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  33  *
  34  * <<Id: LICENSE,v 1.2 2000/06/14 15:57:33 cgd Exp>>
  35  */
  36
  37 #include <sys/cdefs.h>
  38 #ifndef lint
  39 __RCSID("$NetBSD: mount_msdos.c,v 1.46 2008/08/05 20:57:45 pooka Exp $");
  40 #endif /* not lint */
  41
  42 #include <sys/param.h>
  43 #include <sys/mount.h>
  44 #include <sys/stat.h>
  45 #include <msdosfs/msdosfsmount.h>
  46 #include <err.h>
  47 #include <grp.h>
  48 #include <pwd.h>
  49 #include <stdio.h>
  50 #include <stdlib.h>
  51 #include <string.h>
  52 #include <time.h>
  53 #include <unistd.h>
  54 #include <util.h>
  55
  56 #include <mntopts.h>
  57
  58 #include "mountprog.h"
  59 #include "mount_msdos.h"
  60
  61 static const struct mntopt mopts[] = {
  62         MOPT_STDOPTS,
  63         MOPT_ASYNC,
  64         MOPT_SYNC,
  65         MOPT_UPDATE,
  66         MOPT_GETARGS,
  67         MOPT_NULL,
  68 };
  69
  70 static void     usage(void) __dead;
  71
  72 #ifndef MOUNT_NOMAIN
  73 int
  74 main(int argc, char **argv)
  75 {
  76
  77         setprogname(argv[0]);
  78         return mount_msdos(argc, argv);
  79 }
  80 #endif
  81
  82 void
  83 mount_msdos_parseargs(int argc, char **argv,
  84         struct msdosfs_args *args, int *mntflags,
  85         char *canon_dev, char *canon_dir)
  86 {
  87         struct stat sb;
  88         int c, set_gid, set_uid, set_mask, set_dirmask, set_gmtoff;
  89         char *dev, *dir;
  90         time_t now;
  91         struct tm *tm;
  92         mntoptparse_t mp;
  93
  94         *mntflags = set_gid = set_uid = set_mask = set_dirmask = set_gmtoff = 0;
  95         (void)memset(args, '\0', sizeof(*args));
  96
  97         while ((c = getopt(argc, argv, "Gsl9u:g:m:M:o:t:")) != -1) {
  98                 switch (c) {
  99                 case 'G':
 100                         args->flags |= MSDOSFSMNT_GEMDOSFS;
 101                         break;
 102                 case 's':
 103                         args->flags |= MSDOSFSMNT_SHORTNAME;
 104                         break;
 105                 case 'l':
 106                         args->flags |= MSDOSFSMNT_LONGNAME;
 107                         break;
 108                 case '9':
 109                         args->flags |= MSDOSFSMNT_NOWIN95;
 110                         break;
 111                 case 'u':
 112                         args->uid = a_uid(optarg);
 113                         set_uid = 1;
 114                         break;
 115                 case 'g':
 116                         args->gid = a_gid(optarg);
 117                         set_gid = 1;
 118                         break;
 119                 case 'm':
 120                         args->mask = a_mask(optarg);
 121                         set_mask = 1;
 122                         break;
 123                 case 'M':
 124                         args->dirmask = a_mask(optarg);
 125                         set_dirmask = 1;
 126                         break;
 127                 case 'o':
 128                         mp = getmntopts(optarg, mopts, mntflags, 0);
 129                         if (mp == NULL)
 130                                 err(1, "getmntopts");
 131                         freemntopts(mp);
 132                         break;
 133                 case 't':
 134                         args->gmtoff = atoi(optarg);
 135                         set_gmtoff = 1;
 136                         break;
 137                 case '?':
 138                 default:
 139                         usage();
 140                         break;
 141                 }
 142         }
 143
 144         if (optind + 2 != argc)
 145                 usage();
 146
 147         if (set_mask && !set_dirmask) {
 148                 args->dirmask = args->mask;
 149                 set_dirmask = 1;
 150         } else if (set_dirmask && !set_mask) {
 151                 args->mask = args->dirmask;
 152                 set_mask = 1;
 153         }
 154
 155         dev = argv[optind];
 156         dir = argv[optind + 1];
 157
 158         pathadj(dev, canon_dev);
 159         pathadj(dir, canon_dir);
 160
 161         args->fspec = canon_dev;
 162         if (!set_gid || !set_uid || !set_mask) {
 163                 if (stat(dir, &sb) == -1)
 164                         err(1, "stat %s", dir);
 165
 166                 if (!set_uid)
 167                         args->uid = sb.st_uid;
 168                 if (!set_gid)
 169                         args->gid = sb.st_gid;
 170                 if (!set_mask) {
 171                         args->mask = args->dirmask =
 172                                 sb.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO);
 173                 }
 174         }
 175
 176         if (!set_gmtoff) {
 177                 /* use user's time zone as default */
 178                 time(&now);
 179                 tm = localtime(&now);
 180                 args->gmtoff = tm->tm_gmtoff;
 181
 182         }
 183         args->flags |= MSDOSFSMNT_VERSIONED;
 184         args->version = MSDOSFSMNT_VERSION;
 185 }
 186
 187 int
 188 mount_msdos(int argc, char **argv)
 189 {
 190         struct msdosfs_args args;
 191         char canon_dev[MAXPATHLEN], canon_dir[MAXPATHLEN];
 192         int mntflags;
 193
 194         mount_msdos_parseargs(argc, argv, &args, &mntflags,
 195             canon_dev, canon_dir);
 196
 197         if (mount(MOUNT_MSDOS, canon_dir, mntflags, &args, sizeof args) == -1)
 198                 err(1, "%s on %s", canon_dev, canon_dir);
 199
 200         if (mntflags & MNT_GETARGS) {
 201                 char buf[1024];
 202                 (void)snprintb(buf, sizeof(buf), MSDOSFSMNT_BITS, args.flags);
 203                 printf("uid=%d, gid=%d, mask=0%o, dirmask=0%o, flags=%s\n",
 204                     args.uid, args.gid, args.mask, args.dirmask, buf);
 205         }
 206
 207         exit (0);
 208 }
 209
 210 static void
 211 usage(void)
 212 {
 213
 214         fprintf(stderr, "usage: %s [-9Gls] [-g gid] [-M mask] [-m mask] "
 215             "[-o options]\n\t[-t gmtoff] [-u uid] special mountpath\n",
 216             getprogname());
 217         exit(1);
 218 }