144 lines
3.9 KiB
C
144 lines
3.9 KiB
C
/* $NetBSD: amfs_link.c,v 1.1.1.4 2001/05/13 17:50:12 veego Exp $ */
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/*
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* Copyright (c) 1997-2001 Erez Zadok
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* Copyright (c) 1990 Jan-Simon Pendry
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* Copyright (c) 1990 Imperial College of Science, Technology & Medicine
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Jan-Simon Pendry at Imperial College, London.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgment:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* %W% (Berkeley) %G%
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*
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* Id: amfs_link.c,v 1.3.2.1 2001/01/10 03:23:02 ezk Exp
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*
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*/
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/*
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* Symbol-link file system
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif /* HAVE_CONFIG_H */
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#include <am_defs.h>
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#include <amd.h>
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/*
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* Ops structures
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*/
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am_ops amfs_link_ops =
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{
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"link",
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amfs_link_match,
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0, /* amfs_link_init */
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amfs_auto_fmount,
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amfs_link_fmount,
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amfs_auto_fumount,
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amfs_link_fumount,
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amfs_error_lookuppn,
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amfs_error_readdir,
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0, /* amfs_link_readlink */
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0, /* amfs_link_mounted */
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0, /* amfs_link_umounted */
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find_amfs_auto_srvr,
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0
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};
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/*
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* SFS needs a link.
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*/
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char *
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amfs_link_match(am_opts *fo)
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{
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if (!fo->opt_fs) {
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plog(XLOG_USER, "link: no fs specified");
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return 0;
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}
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/*
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* Bug report (14/12/89) from Jay Plett <jay@princeton.edu>
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* If an automount point has the same name as an existing
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* link type mount Amd hits a race condition and either hangs
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* or causes a symlink loop.
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*
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* If fs begins with a '/' change the opt_fs & opt_sublink
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* fields so that the fs option doesn't end up pointing at
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* an existing symlink.
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*
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* If sublink is nil then set sublink to fs
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* else set sublink to fs / sublink
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*
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* Finally set fs to ".".
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*/
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if (*fo->opt_fs == '/') {
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char *fullpath;
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char *link = fo->opt_sublink;
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if (link) {
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if (*link == '/')
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fullpath = strdup(link);
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else
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fullpath = str3cat((char *) 0, fo->opt_fs, "/", link);
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} else {
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fullpath = strdup(fo->opt_fs);
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}
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if (fo->opt_sublink)
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XFREE(fo->opt_sublink);
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fo->opt_sublink = fullpath;
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fo->opt_fs = str3cat(fo->opt_fs, ".", fullpath, "");
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}
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return strdup(fo->opt_fs);
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}
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int
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amfs_link_fmount(mntfs *mf)
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{
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/*
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* Wow - this is hard to implement! :-)
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*/
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return 0;
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}
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int
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amfs_link_fumount(mntfs *mf)
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{
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return 0;
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}
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