/*      $NetBSD: ops_pcfs.c,v 1.1.1.3 2015/01/17 16:34:15 christos Exp $        */

/*
* Copyright (c) 1997-2014 Erez Zadok
* Copyright (c) 1990 Jan-Simon Pendry
* Copyright (c) 1990 Imperial College of Science, Technology & Medicine
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Jan-Simon Pendry at Imperial College, London.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*
* File: am-utils/amd/ops_pcfs.c
*
*/

/*
* PC (MS-DOS) file system
*/

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif /* HAVE_CONFIG_H */
#include <am_defs.h>
#include <amd.h>

/* forward definitions */
static char *pcfs_match(am_opts *fo);
static int pcfs_mount(am_node *am, mntfs *mf);
static int pcfs_umount(am_node *am, mntfs *mf);

/*
* Ops structure
*/
am_ops pcfs_ops =
{
 "pcfs",
 pcfs_match,
 0,                            /* pcfs_init */
 pcfs_mount,
 pcfs_umount,
 amfs_error_lookup_child,
 amfs_error_mount_child,
 amfs_error_readdir,
 0,                            /* pcfs_readlink */
 0,                            /* pcfs_mounted */
 0,                            /* pcfs_umounted */
 amfs_generic_find_srvr,
 0,                            /* pcfs_get_wchan */
 FS_MKMNT | FS_UBACKGROUND | FS_AMQINFO,       /* nfs_fs_flags */
#ifdef HAVE_FS_AUTOFS
 AUTOFS_PCFS_FS_FLAGS,
#endif /* HAVE_FS_AUTOFS */
};



/*
* PCFS needs remote filesystem.
*/
static char *
pcfs_match(am_opts *fo)
{
 if (!fo->opt_dev) {
   plog(XLOG_USER, "pcfs: no source device specified");
   return 0;
 }
 dlog("PCFS: mounting device \"%s\" on \"%s\"", fo->opt_dev, fo->opt_fs);

 /*
  * Determine magic cookie to put in mtab
  */
 return xstrdup(fo->opt_dev);
}


static int
mount_pcfs(char *mntdir, char *fs_name, char *opts, int on_autofs)
{
 pcfs_args_t pcfs_args;
 mntent_t mnt;
 int flags;
#if defined(HAVE_PCFS_ARGS_T_MASK) || defined(HAVE_PCFS_ARGS_T_DIRMASK)
 int mask;
#endif /* defined(HAVE_PCFS_ARGS_T_MASK) || defined(HAVE_PCFS_ARGS_T_DIRMASK) */
#if defined(HAVE_PCFS_ARGS_T_UID) || defined(HAVE_PCFS_ARGS_T_UID)
 char *str;
#endif /* defined(HAVE_PCFS_ARGS_T_UID) || defined(HAVE_PCFS_ARGS_T_UID) */

 /*
  * Figure out the name of the file system type.
  */
 MTYPE_TYPE type = MOUNT_TYPE_PCFS;

 memset((voidp) &pcfs_args, 0, sizeof(pcfs_args)); /* Paranoid */

 /*
  * Fill in the mount structure
  */
 memset((voidp) &mnt, 0, sizeof(mnt));
 mnt.mnt_dir = mntdir;
 mnt.mnt_fsname = fs_name;
 mnt.mnt_type = MNTTAB_TYPE_PCFS;
 mnt.mnt_opts = opts;

 flags = compute_mount_flags(&mnt);
#ifdef HAVE_FS_AUTOFS
 if (on_autofs)
   flags |= autofs_compute_mount_flags(&mnt);
#endif /* HAVE_FS_AUTOFS */
 if (amuDebug(D_TRACE))
   plog(XLOG_DEBUG, "mount_pcfs: flags=0x%x", (u_int) flags);

#ifdef HAVE_PCFS_ARGS_T_FSPEC
 pcfs_args.fspec = fs_name;
#endif /* HAVE_PCFS_ARGS_T_FSPEC */

#ifdef HAVE_PCFS_ARGS_T_MASK
 pcfs_args.mask = 0777;        /* this may be the msdos file modes */
 if ((mask = hasmntval(&mnt, MNTTAB_OPT_MASK)) > 0)
   pcfs_args.mask = mask;
 if (amuDebug(D_TRACE))
   plog(XLOG_DEBUG, "mount_pcfs: mask=%o (octal)", (u_int) pcfs_args.mask);
#endif /* HAVE_PCFS_ARGS_T_MASK */

#ifdef HAVE_PCFS_ARGS_T_DIRMASK
 pcfs_args.dirmask = 0777;    /* this may be the msdos dir modes */
 if ((mask = hasmntval(&mnt, MNTTAB_OPT_DIRMASK)) > 0)
   pcfs_args.dirmask = mask;
 if (amuDebug(D_TRACE))
   plog(XLOG_DEBUG, "mount_pcfs: dirmask=%o (octal)", (u_int) pcfs_args.dirmask);
#endif /* HAVE_PCFS_ARGS_T_DIRMASK */

#ifdef HAVE_PCFS_ARGS_T_UID
 pcfs_args.uid = 0;            /* default to root */
 if ((str = hasmntstr(&mnt, MNTTAB_OPT_USER)) != NULL) {
   struct passwd *pw;
   if ((pw = getpwnam(str)) != NULL)
     pcfs_args.uid = pw->pw_uid;
   else                 /* maybe used passed a UID number, not user name */
     pcfs_args.uid = atoi(str); /* atoi returns '0' if it failed */
   XFREE(str);
 }
 if (amuDebug(D_TRACE))
   plog(XLOG_DEBUG, "mount_pcfs: uid=%d", (int) pcfs_args.uid);
#endif /* HAVE_PCFS_ARGS_T_UID */

#ifdef HAVE_PCFS_ARGS_T_GID
 pcfs_args.gid = 0;            /* default to wheel/root group */
 if ((str = hasmntstr(&mnt, MNTTAB_OPT_GROUP)) != NULL) {
   struct group *gr;
   if ((gr = getgrnam(str)) != NULL)
     pcfs_args.gid = gr->gr_gid;
   else                /* maybe used passed a GID number, not group name */
     pcfs_args.gid = atoi(str); /* atoi returns '0' if it failed */
   XFREE(str);
 }
 if (amuDebug(D_TRACE))
   plog(XLOG_DEBUG, "mount_pcfs: gid=%d", (int) pcfs_args.gid);
#endif /* HAVE_PCFS_ARGS_T_GID */

#ifdef HAVE_PCFS_ARGS_T_SECONDSWEST
 pcfs_args.secondswest = 0;    /* XXX: fill in correct values */
#endif /* HAVE_PCFS_ARGS_T_SECONDSWEST */
#ifdef HAVE_PCFS_ARGS_T_DSTTIME
 pcfs_args.dsttime = 0;        /* XXX: fill in correct values */
#endif /* HAVE_PCFS_ARGS_T_DSTTIME */

 /*
  * Call generic mount routine
  */
 return mount_fs(&mnt, flags, (caddr_t) & pcfs_args, 0, type, 0, NULL, mnttab_file_name, on_autofs);
}


static int
pcfs_mount(am_node *am, mntfs *mf)
{
 int on_autofs = mf->mf_flags & MFF_ON_AUTOFS;
 int error;

 error = mount_pcfs(mf->mf_mount, mf->mf_info, mf->mf_mopts, on_autofs);
 if (error) {
   errno = error;
   plog(XLOG_ERROR, "mount_pcfs: %m");
   return error;
 }

 return 0;
}


static int
pcfs_umount(am_node *am, mntfs *mf)
{
 int unmount_flags = (mf->mf_flags & MFF_ON_AUTOFS) ? AMU_UMOUNT_AUTOFS : 0;

 return UMOUNT_FS(mf->mf_mount, mnttab_file_name, unmount_flags);
}

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