external/bsd/am-utils/dist/amd/ops_pcfs.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_pcfs.c
  43  *
  44  */
  45
  46 /*
  47  * PC (MS-DOS) 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 *pcfs_match(am_opts *fo);
  58 static int pcfs_mount(am_node *am, mntfs *mf);
  59 static int pcfs_umount(am_node *am, mntfs *mf);
  60
  61 /*
  62  * Ops structure
  63  */
  64 am_ops pcfs_ops =
  65 {
  66   "pcfs",
  67   pcfs_match,
  68   0,                            /* pcfs_init */
  69   pcfs_mount,
  70   pcfs_umount,
  71   amfs_error_lookup_child,
  72   amfs_error_mount_child,
  73   amfs_error_readdir,
  74   0,                            /* pcfs_readlink */
  75   0,                            /* pcfs_mounted */
  76   0,                            /* pcfs_umounted */
  77   amfs_generic_find_srvr,
  78   0,                            /* pcfs_get_wchan */
  79   FS_MKMNT | FS_UBACKGROUND | FS_AMQINFO,       /* nfs_fs_flags */
  80 #ifdef HAVE_FS_AUTOFS
  81   AUTOFS_PCFS_FS_FLAGS,
  82 #endif /* HAVE_FS_AUTOFS */
  83 };
  84
  85
  86
  87 /*
  88  * PCFS needs remote filesystem.
  89  */
  90 static char *
  91 pcfs_match(am_opts *fo)
  92 {
  93   if (!fo->opt_dev) {
  94     plog(XLOG_USER, "pcfs: no source device specified");
  95     return 0;
  96   }
  97   dlog("PCFS: mounting device \"%s\" on \"%s\"", fo->opt_dev, fo->opt_fs);
  98
  99   /*
 100    * Determine magic cookie to put in mtab
 101    */
 102   return strdup(fo->opt_dev);
 103 }
 104
 105
 106 static int
 107 mount_pcfs(char *mntdir, char *fs_name, char *opts, int on_autofs)
 108 {
 109   pcfs_args_t pcfs_args;
 110   mntent_t mnt;
 111   int flags;
 112 #if defined(HAVE_PCFS_ARGS_T_MASK) || defined(HAVE_PCFS_ARGS_T_DIRMASK)
 113   int mask;
 114 #endif /* defined(HAVE_PCFS_ARGS_T_MASK) || defined(HAVE_PCFS_ARGS_T_DIRMASK) */
 115 #if defined(HAVE_PCFS_ARGS_T_UID) || defined(HAVE_PCFS_ARGS_T_UID)
 116   char *str;
 117 #endif /* defined(HAVE_PCFS_ARGS_T_UID) || defined(HAVE_PCFS_ARGS_T_UID) */
 118
 119   /*
 120    * Figure out the name of the file system type.
 121    */
 122   MTYPE_TYPE type = MOUNT_TYPE_PCFS;
 123
 124   memset((voidp) &pcfs_args, 0, sizeof(pcfs_args)); /* Paranoid */
 125
 126   /*
 127    * Fill in the mount structure
 128    */
 129   memset((voidp) &mnt, 0, sizeof(mnt));
 130   mnt.mnt_dir = mntdir;
 131   mnt.mnt_fsname = fs_name;
 132   mnt.mnt_type = MNTTAB_TYPE_PCFS;
 133   mnt.mnt_opts = opts;
 134
 135   flags = compute_mount_flags(&mnt);
 136 #ifdef HAVE_FS_AUTOFS
 137   if (on_autofs)
 138     flags |= autofs_compute_mount_flags(&mnt);
 139 #endif /* HAVE_FS_AUTOFS */
 140   if (amuDebug(D_TRACE))
 141     plog(XLOG_DEBUG, "mount_pcfs: flags=0x%x", (u_int) flags);
 142
 143 #ifdef HAVE_PCFS_ARGS_T_FSPEC
 144   pcfs_args.fspec = fs_name;
 145 #endif /* HAVE_PCFS_ARGS_T_FSPEC */
 146
 147 #ifdef HAVE_PCFS_ARGS_T_MASK
 148   pcfs_args.mask = 0777;        /* this may be the msdos file modes */
 149   if ((mask = hasmntval(&mnt, MNTTAB_OPT_MASK)) > 0)
 150     pcfs_args.mask = mask;
 151   if (amuDebug(D_TRACE))
 152     plog(XLOG_DEBUG, "mount_pcfs: mask=%o (octal)", (u_int) pcfs_args.mask);
 153 #endif /* HAVE_PCFS_ARGS_T_MASK */
 154
 155 #ifdef HAVE_PCFS_ARGS_T_DIRMASK
 156   pcfs_args.dirmask = 0777;    /* this may be the msdos dir modes */
 157   if ((mask = hasmntval(&mnt, MNTTAB_OPT_DIRMASK)) > 0)
 158     pcfs_args.dirmask = mask;
 159   if (amuDebug(D_TRACE))
 160     plog(XLOG_DEBUG, "mount_pcfs: dirmask=%o (octal)", (u_int) pcfs_args.dirmask);
 161 #endif /* HAVE_PCFS_ARGS_T_DIRMASK */
 162
 163 #ifdef HAVE_PCFS_ARGS_T_UID
 164   pcfs_args.uid = 0;            /* default to root */
 165   if ((str = hasmntstr(&mnt, MNTTAB_OPT_USER)) != NULL) {
 166     struct passwd *pw;
 167     if ((pw = getpwnam(str)) != NULL)
 168       pcfs_args.uid = pw->pw_uid;
 169     else                 /* maybe used passed a UID number, not user name */
 170       pcfs_args.uid = atoi(str); /* atoi returns '0' if it failed */
 171     XFREE(str);
 172   }
 173   if (amuDebug(D_TRACE))
 174     plog(XLOG_DEBUG, "mount_pcfs: uid=%d", (int) pcfs_args.uid);
 175 #endif /* HAVE_PCFS_ARGS_T_UID */
 176
 177 #ifdef HAVE_PCFS_ARGS_T_GID
 178   pcfs_args.gid = 0;            /* default to wheel/root group */
 179   if ((str = hasmntstr(&mnt, MNTTAB_OPT_GROUP)) != NULL) {
 180     struct group *gr;
 181     if ((gr = getgrnam(str)) != NULL)
 182       pcfs_args.gid = gr->gr_gid;
 183     else                /* maybe used passed a GID number, not group name */
 184       pcfs_args.gid = atoi(str); /* atoi returns '0' if it failed */
 185     XFREE(str);
 186   }
 187   if (amuDebug(D_TRACE))
 188     plog(XLOG_DEBUG, "mount_pcfs: gid=%d", (int) pcfs_args.gid);
 189 #endif /* HAVE_PCFS_ARGS_T_GID */
 190
 191 #ifdef HAVE_PCFS_ARGS_T_SECONDSWEST
 192   pcfs_args.secondswest = 0;    /* XXX: fill in correct values */
 193 #endif /* HAVE_PCFS_ARGS_T_SECONDSWEST */
 194 #ifdef HAVE_PCFS_ARGS_T_DSTTIME
 195   pcfs_args.dsttime = 0;        /* XXX: fill in correct values */
 196 #endif /* HAVE_PCFS_ARGS_T_DSTTIME */
 197
 198   /*
 199    * Call generic mount routine
 200    */
 201   return mount_fs(&mnt, flags, (caddr_t) & pcfs_args, 0, type, 0, NULL, mnttab_file_name, on_autofs);
 202 }
 203
 204
 205 static int
 206 pcfs_mount(am_node *am, mntfs *mf)
 207 {
 208   int on_autofs = mf->mf_flags & MFF_ON_AUTOFS;
 209   int error;
 210
 211   error = mount_pcfs(mf->mf_mount, mf->mf_info, mf->mf_mopts, on_autofs);
 212   if (error) {
 213     errno = error;
 214     plog(XLOG_ERROR, "mount_pcfs: %m");
 215     return error;
 216   }
 217
 218   return 0;
 219 }
 220
 221
 222 static int
 223 pcfs_umount(am_node *am, mntfs *mf)
 224 {
 225   int unmount_flags = (mf->mf_flags & MFF_ON_AUTOFS) ? AMU_UMOUNT_AUTOFS : 0;
 226
 227   return UMOUNT_FS(mf->mf_mount, mnttab_file_name, unmount_flags);
 228 }