154 lines
4.2 KiB
C
154 lines
4.2 KiB
C
/* $NetBSD: amfs_link.c,v 1.1.1.5 2002/11/29 22:58:11 christos Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1997-2002 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.
|
|
*
|
|
*
|
|
* Id: amfs_link.c,v 1.14 2002/03/29 20:01:26 ib42 Exp
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* Symbol-link file system
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include <config.h>
|
|
#endif /* HAVE_CONFIG_H */
|
|
#include <am_defs.h>
|
|
#include <amd.h>
|
|
|
|
|
|
/*
|
|
* Ops structures
|
|
*/
|
|
am_ops amfs_link_ops =
|
|
{
|
|
"link",
|
|
amfs_link_match,
|
|
0, /* amfs_link_init */
|
|
amfs_link_mount,
|
|
amfs_link_umount,
|
|
amfs_error_lookup_child,
|
|
amfs_error_mount_child,
|
|
amfs_error_readdir,
|
|
0, /* amfs_link_readlink */
|
|
0, /* amfs_link_mounted */
|
|
0, /* amfs_link_umounted */
|
|
find_amfs_auto_srvr,
|
|
0, /* nfs_fs_flags */
|
|
#ifdef HAVE_FS_AUTOFS
|
|
AUTOFS_LINK_FS_FLAGS,
|
|
#endif /* HAVE_FS_AUTOFS */
|
|
};
|
|
|
|
|
|
/*
|
|
* SFS needs a link.
|
|
*/
|
|
char *
|
|
amfs_link_match(am_opts *fo)
|
|
{
|
|
|
|
if (!fo->opt_fs) {
|
|
plog(XLOG_USER, "link: no fs specified");
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Bug report (14/12/89) from Jay Plett <jay@princeton.edu>
|
|
* If an automount point has the same name as an existing
|
|
* link type mount Amd hits a race condition and either hangs
|
|
* or causes a symlink loop.
|
|
*
|
|
* If fs begins with a '/' change the opt_fs & opt_sublink
|
|
* fields so that the fs option doesn't end up pointing at
|
|
* an existing symlink.
|
|
*
|
|
* If sublink is nil then set sublink to fs
|
|
* else set sublink to fs / sublink
|
|
*
|
|
* Finally set fs to ".".
|
|
*/
|
|
if (*fo->opt_fs == '/') {
|
|
char *fullpath;
|
|
char *link = fo->opt_sublink;
|
|
if (link) {
|
|
if (*link == '/')
|
|
fullpath = strdup(link);
|
|
else
|
|
fullpath = str3cat((char *) 0, fo->opt_fs, "/", link);
|
|
} else {
|
|
fullpath = strdup(fo->opt_fs);
|
|
}
|
|
|
|
if (fo->opt_sublink)
|
|
XFREE(fo->opt_sublink);
|
|
fo->opt_sublink = fullpath;
|
|
fo->opt_fs = str3cat(fo->opt_fs, ".", fullpath, "");
|
|
}
|
|
|
|
return strdup(fo->opt_fs);
|
|
}
|
|
|
|
|
|
int
|
|
amfs_link_mount(am_node *mp, mntfs *mf)
|
|
{
|
|
#ifdef HAVE_FS_AUTOFS
|
|
if (mp->am_flags & AMF_AUTOFS) {
|
|
return autofs_link_mount(mp);
|
|
}
|
|
#endif /* HAVE_FS_AUTOFS */
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
int
|
|
amfs_link_umount(am_node *mp, mntfs *mf)
|
|
{
|
|
#ifdef HAVE_FS_AUTOFS
|
|
if (mp->am_flags & AMF_AUTOFS) {
|
|
return autofs_link_umount(mp);
|
|
}
|
|
#endif /* HAVE_FS_AUTOFS */
|
|
|
|
return 0;
|
|
}
|