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/*
* Copyright (c) 1997-2006 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgment:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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/amfs_auto.c
*
*/
/*
* Automount file system
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif /* HAVE_CONFIG_H */
#include <am_defs.h>
#include <amd.h>
/****************************************************************************
*** MACROS ***
****************************************************************************/
/****************************************************************************
*** STRUCTURES ***
****************************************************************************/
/****************************************************************************
*** FORWARD DEFINITIONS ***
****************************************************************************/
static int amfs_auto_mount(am_node *mp, mntfs *mf);
/****************************************************************************
*** OPS STRUCTURES ***
****************************************************************************/
am_ops amfs_auto_ops =
{
"auto",
amfs_generic_match,
0, /* amfs_auto_init */
amfs_auto_mount,
amfs_generic_umount,
amfs_generic_lookup_child,
amfs_generic_mount_child,
amfs_generic_readdir,
0, /* amfs_auto_readlink */
amfs_generic_mounted,
0, /* amfs_auto_umounted */
amfs_generic_find_srvr,
0, /* amfs_auto_get_wchan */
FS_AMQINFO | FS_DIRECTORY,
#ifdef HAVE_FS_AUTOFS
AUTOFS_AUTO_FS_FLAGS,
#endif /* HAVE_FS_AUTOFS */
};
/****************************************************************************
*** FUNCTIONS ***
****************************************************************************/
/*
* Mount a sub-mount
*/
static int
amfs_auto_mount(am_node *mp, mntfs *mf)
{
/*
* Pseudo-directories are used to provide some structure
* to the automounted directories instead
* of putting them all in the top-level automount directory.
*
* Here, just increment the parent's link count.
*/
mp->am_parent->am_fattr.na_nlink++;
/*
* Info field of . means use parent's info field.
* Historical - not documented.
*/
if (mf->mf_info[0] == '.' && mf->mf_info[1] == '\0')
mf->mf_info = strealloc(mf->mf_info, mp->am_parent->am_mnt->mf_info);
/*
* Compute prefix:
*
* If there is an option prefix then use that else
* If the parent had a prefix then use that with name
* of this node appended else
* Use the name of this node.
*
* That means if you want no prefix you must say so
* in the map.
*/
if (mf->mf_fo->opt_pref) {
/* allow pref:=null to set a real null prefix */
if (STREQ(mf->mf_fo->opt_pref, "null")) {
mp->am_pref = strdup("");
} else {
/*
* the prefix specified as an option
*/
mp->am_pref = strdup(mf->mf_fo->opt_pref);
}
} else {
/*
* else the parent's prefix
* followed by the name
* followed by /
*/
char *ppref = mp->am_parent->am_pref;
if (ppref == 0)
ppref = "";
mp->am_pref = str3cat((char *) 0, ppref, mp->am_name, "/");
}
#ifdef HAVE_FS_AUTOFS
if (mf->mf_flags & MFF_IS_AUTOFS) {
char opts[SIZEOF_OPTS];
int error;
autofs_get_opts(opts, sizeof(opts), mp->am_autofs_fh);
/* now do the mount */
error = amfs_mount(mp, mf, opts);
if (error) {
errno = error;
plog(XLOG_FATAL, "amfs_auto_mount: amfs_mount failed: %m");
return error;
}
}
#endif /* HAVE_FS_AUTOFS */
/*
* Attach a map cache
*/
amfs_mkcacheref(mf);
return 0;
}
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