external/bsd/am-utils/dist/amd/ops_udf.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (c) 1997-2009 Erez Zadok
   5  * Copyright (c) 1990 Jan-Simon Pendry
   6  * Copyright (c) 1990 Imperial College of Science, Technology & Medicine
   7  * Copyright (c) 1990 The Regents of the University of California.
   8  * All rights reserved.
   9  *
  10  * This code is derived from software contributed to Berkeley by
  11  * Jan-Simon Pendry at Imperial College, London.
  12  *
  13  * Redistribution and use in source and binary forms, with or without
  14  * modification, are permitted provided that the following conditions
  15  * are met:
  16  * 1. Redistributions of source code must retain the above copyright
  17  *    notice, this list of conditions and the following disclaimer.
  18  * 2. Redistributions in binary form must reproduce the above copyright
  19  *    notice, this list of conditions and the following disclaimer in the
  20  *    documentation and/or other materials provided with the distribution.
  21  * 3. All advertising materials mentioning features or use of this software
  22  *    must display the following acknowledgment:
  23  *      This product includes software developed by the University of
  24  *      California, Berkeley and its contributors.
  25  * 4. Neither the name of the University nor the names of its contributors
  26  *    may be used to endorse or promote products derived from this software
  27  *    without specific prior written permission.
  28  *
  29  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  30  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  31  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  32  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  33  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  34  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  35  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  36  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  37  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  38  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  39  * SUCH DAMAGE.
  40  *
  41  *
  42  * File: am-utils/amd/ops_udf.c
  43  *
  44  */
  45
  46 /*
  47  * UDF file system
  48  */
  49
  50 #ifdef HAVE_CONFIG_H
  51 # include <config.h>
  52 #endif /* HAVE_CONFIG_H */
  53 #include <am_defs.h>
  54 #include <amd.h>
  55
  56 /* forward definitions */
  57 static char *udf_match(am_opts *fo);
  58 static int udf_mount(am_node *am, mntfs *mf);
  59 static int udf_umount(am_node *am, mntfs *mf);
  60
  61 /*
  62  * Ops structure
  63  */
  64 am_ops udf_ops =
  65 {
  66         "udf",
  67         udf_match,
  68         0,                              /* udf_init */
  69         udf_mount,
  70         udf_umount,
  71         amfs_error_lookup_child,
  72         amfs_error_mount_child,
  73         amfs_error_readdir,
  74         0,                              /* udf_readlink */
  75         0,                              /* udf_mounted */
  76         0,                              /* udf_umounted */
  77         amfs_generic_find_srvr,
  78         0,                              /* udf_get_wchan */
  79         FS_MKMNT | FS_UBACKGROUND | FS_AMQINFO, /* nfs_fs_flags */
  80 #ifdef HAVE_FS_AUTOFS
  81         AUTOFS_UDF_FS_FLAGS,
  82 #endif /* HAVE_FS_AUTOFS */
  83 };
  84
  85 #if defined(HAVE_UDF_ARGS_T_NOBODY_GID) || defined(HAVE_UDF_ARGS_T_NOBODY_UID)
  86 static int
  87 a_num(const char *s, const char *id_type)
  88 {
  89         int id;
  90         char *ep;
  91
  92         id = strtol(s, &ep, 0);
  93         if (*ep || s == ep || id < 0) {
  94                 plog(XLOG_ERROR, "mount_udf: unknown %s: %s", id_type, s);
  95                 return 0;
  96         }
  97         return id;
  98 }
  99 #endif /* defined(HAVE_UDF_ARGS_T_NOBODY_GID) || defined(HAVE_UDF_ARGS_T_NOBODY_UID) */
 100
 101 #if defined(HAVE_UDF_ARGS_T_NOBODY_GID)
 102 static gid_t
 103 a_gid(const char *s, const char *id_type)
 104 {
 105         struct group *gr;
 106
 107         if ((gr = getgrnam(s)) != NULL)
 108                 return gr->gr_gid;
 109         return a_num(s, id_type);
 110 }
 111 #endif /* defined(HAVE_UDF_ARGS_T_NOBODY_GID) */
 112
 113 #if defined(HAVE_UDF_ARGS_T_NOBODY_UID)
 114 static uid_t
 115 a_uid(const char *s, const char *id_type)
 116 {
 117         struct passwd *pw;
 118
 119         if ((pw = getpwnam(s)) != NULL)
 120                 return pw->pw_uid;
 121         return a_num(s, id_type);
 122 }
 123 #endif /* defined(HAVE_UDF_ARGS_T_NOBODY_UID) */
 124
 125 /*
 126  * UDF needs remote filesystem.
 127  */
 128 static char *
 129 udf_match(am_opts *fo)
 130 {
 131
 132         if (!fo->opt_dev) {
 133                 plog(XLOG_USER, "udf: no source device specified");
 134                 return 0;
 135         }
 136         dlog("UDF: mounting device \"%s\" on \"%s\"", fo->opt_dev, fo->opt_fs);
 137
 138         /*
 139          * Determine magic cookie to put in mtab
 140          */
 141         return strdup(fo->opt_dev);
 142 }
 143
 144 static int
 145 mount_udf(char *mntdir, char *fs_name, char *opts, int on_autofs)
 146 {
 147         udf_args_t udf_args;
 148         mntent_t mnt;
 149         int flags;
 150         char *str;
 151 #if defined(HAVE_UDF_ARGS_T_NOBODY_UID) || defined(HAVE_UDF_ARGS_T_ANON_UID)
 152         uid_t uid_nobody;
 153         gid_t gid_nobody;
 154 #endif /* defined(HAVE_UDF_ARGS_T_NOBODY_UID) || defined(HAVE_UDF_ARGS_T_ANON_UID) */
 155         /*
 156          * Figure out the name of the file system type.
 157          */
 158         MTYPE_TYPE type = MOUNT_TYPE_UDF;
 159
 160 #if defined(HAVE_UDF_ARGS_T_NOBODY_UID) || defined(HAVE_UDF_ARGS_T_ANON_UID)
 161         uid_nobody = a_uid("nobody", "user");
 162         if (uid_nobody == 0) {
 163                 plog(XLOG_ERROR, "mount_udf: invalid uid for nobody");
 164                 return EPERM;
 165         }
 166 #endif /* defined(HAVE_UDF_ARGS_T_NOBODY_UID) || defined(HAVE_UDF_ARGS_T_ANON_UID) */
 167
 168 #if defined(HAVE_UDF_ARGS_T_NOBODY_GID) || defined(HAVE_UDF_ARGS_T_ANON_GID)
 169         gid_nobody = a_gid("nobody", "group");
 170         if (gid_nobody == 0) {
 171                 plog(XLOG_ERROR, "mount_udf: invalid gid for nobody");
 172                 return EPERM;
 173         }
 174 #endif /* defined(HAVE_UDF_ARGS_T_NOBODY_GID) || defined(HAVE_UDF_ARGS_T_ANON_GID) */
 175
 176         str = NULL;
 177         memset((voidp) &udf_args, 0, sizeof(udf_args)); /* Paranoid */
 178
 179         /*
 180          * Fill in the mount structure
 181          */
 182         memset((voidp)&mnt, 0, sizeof(mnt));
 183         mnt.mnt_dir = mntdir;
 184         mnt.mnt_fsname = fs_name;
 185         mnt.mnt_type = MNTTAB_TYPE_UDF;
 186         mnt.mnt_opts = opts;
 187
 188         flags = compute_mount_flags(&mnt);
 189
 190 #ifdef HAVE_UDF_ARGS_T_UDFMFLAGS
 191 # if defined(MNT2_UDF_OPT_CLOSESESSION) && defined(MNTTAB_OPT_CLOSESESSION)
 192         if (amu_hasmntopt(&mnt, MNTTAB_OPT_CLOSESESSION))
 193                 udf_args.udfmflags |= MNT2_UDF_OPT_CLOSESESSION;
 194 # endif /* defined(MNT2_UDF_OPT_CLOSESESSION) && defined(MNTTAB_OPT_CLOSESESSION) */
 195 #endif /* HAVE_UDF_ARGS_T_UDFMFLAGS */
 196
 197 #ifdef HAVE_UDF_ARGS_T_NOBODY_UID
 198         udf_args.nobody_uid = uid_nobody;
 199 #endif /* HAVE_UDF_ARGS_T_NOBODY_UID */
 200
 201 #ifdef HAVE_UDF_ARGS_T_NOBODY_GID
 202         udf_args.nobody_gid = gid_nobody;
 203 #endif /* HAVE_UDF_ARGS_T_NOBODY_GID */
 204
 205 #ifdef HAVE_UDF_ARGS_T_ANON_UID
 206         udf_args.anon_uid = uid_nobody; /* default to nobody */
 207         if ((str = hasmntstr(&mnt, MNTTAB_OPT_USER)) != NULL) {
 208                 udf_args.anon_uid = a_uid(str, MNTTAB_OPT_USER);
 209                 XFREE(str);
 210         }
 211 #endif /* HAVE_UDF_ARGS_T_ANON_UID */
 212
 213 #ifdef HAVE_UDF_ARGS_T_ANON_GID
 214         udf_args.anon_gid = gid_nobody; /* default to nobody */
 215         if ((str = hasmntstr(&mnt, MNTTAB_OPT_GROUP)) != NULL) {
 216                 udf_args.anon_gid = a_gid(str, MNTTAB_OPT_GROUP);
 217                 XFREE(str);
 218         }
 219 #endif /* HAVE_UDF_ARGS_T_ANON_GID */
 220
 221 #ifdef HAVE_UDF_ARGS_T_GMTOFF
 222         udf_args.gmtoff = 0;
 223         if ((str = hasmntstr(&mnt, MNTTAB_OPT_GMTOFF)) != NULL) {
 224                 udf_args.gmtoff = a_num(str, MNTTAB_OPT_GMTOFF);
 225                 XFREE(str);
 226         }
 227 #endif /* HAVE_UDF_ARGS_T_GMTOFF */
 228
 229 #ifdef HAVE_UDF_ARGS_T_SESSIONNR
 230         udf_args.sessionnr = 0;
 231         if ((str = hasmntstr(&mnt, MNTTAB_OPT_SESSIONNR)) != NULL) {
 232                 udf_args.sessionnr = a_num(str, MNTTAB_OPT_SESSIONNR);
 233                 XFREE(str);
 234         }
 235 #endif /* HAVE_UDF_ARGS_T_SESSIONNR */
 236
 237 #ifdef HAVE_UDF_ARGS_T_VERSION
 238 # ifdef UDFMNT_VERSION
 239         udf_args.version = UDFMNT_VERSION;
 240 # endif /* UDFMNT_VERSION */
 241 #endif /* HAVE_UDF_ARGS_T_VERSION */
 242
 243 #ifdef HAVE_UFS_ARGS_T_FSPEC
 244         udf_args.fspec = fs_name;
 245 #endif /* HAVE_UFS_ARGS_T_FSPEC */
 246
 247         /*
 248          * Call generic mount routine
 249          */
 250         return mount_fs(&mnt, flags, (caddr_t)&udf_args, 0, type, 0, NULL,
 251             mnttab_file_name, on_autofs);
 252 }
 253
 254 static int
 255 udf_mount(am_node *am, mntfs *mf)
 256 {
 257         int on_autofs;
 258         int error;
 259
 260         on_autofs = mf->mf_flags & MFF_ON_AUTOFS;
 261         error = mount_udf(mf->mf_mount, mf->mf_info, mf->mf_mopts, on_autofs);
 262         if (error) {
 263                 errno = error;
 264                 plog(XLOG_ERROR, "mount_udf: %m");
 265                 return error;
 266         }
 267         return 0;
 268 }
 269
 270
 271 static int
 272 udf_umount(am_node *am, mntfs *mf)
 273 {
 274         int unmount_flags;
 275
 276         unmount_flags = (mf->mf_flags & MFF_ON_AUTOFS) ? AMU_UMOUNT_AUTOFS : 0;
 277         return UMOUNT_FS(mf->mf_mount, mnttab_file_name, unmount_flags);
 278 }