138494Sobrien/* 2174294Sobrien * Copyright (c) 1997-2006 Erez Zadok 338494Sobrien * Copyright (c) 1990 Jan-Simon Pendry 438494Sobrien * Copyright (c) 1990 Imperial College of Science, Technology & Medicine 538494Sobrien * Copyright (c) 1990 The Regents of the University of California. 638494Sobrien * All rights reserved. 738494Sobrien * 838494Sobrien * This code is derived from software contributed to Berkeley by 938494Sobrien * Jan-Simon Pendry at Imperial College, London. 1038494Sobrien * 1138494Sobrien * Redistribution and use in source and binary forms, with or without 1238494Sobrien * modification, are permitted provided that the following conditions 1338494Sobrien * are met: 1438494Sobrien * 1. Redistributions of source code must retain the above copyright 1538494Sobrien * notice, this list of conditions and the following disclaimer. 1638494Sobrien * 2. Redistributions in binary form must reproduce the above copyright 1738494Sobrien * notice, this list of conditions and the following disclaimer in the 1838494Sobrien * documentation and/or other materials provided with the distribution. 1938494Sobrien * 3. All advertising materials mentioning features or use of this software 2042629Sobrien * must display the following acknowledgment: 2138494Sobrien * This product includes software developed by the University of 2238494Sobrien * California, Berkeley and its contributors. 2338494Sobrien * 4. Neither the name of the University nor the names of its contributors 2438494Sobrien * may be used to endorse or promote products derived from this software 2538494Sobrien * without specific prior written permission. 2638494Sobrien * 2738494Sobrien * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2838494Sobrien * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2938494Sobrien * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 3038494Sobrien * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 3138494Sobrien * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 3238494Sobrien * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 3338494Sobrien * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 3438494Sobrien * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 3538494Sobrien * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3638494Sobrien * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3738494Sobrien * SUCH DAMAGE. 3838494Sobrien * 3938494Sobrien * 40174294Sobrien * File: am-utils/amd/amfs_linkx.c 4138494Sobrien * 4238494Sobrien */ 4338494Sobrien 4438494Sobrien/* 4538494Sobrien * Symbol-link file system, with test that the target of the link exists. 4638494Sobrien */ 4738494Sobrien 4838494Sobrien#ifdef HAVE_CONFIG_H 4938494Sobrien# include <config.h> 5038494Sobrien#endif /* HAVE_CONFIG_H */ 5138494Sobrien#include <am_defs.h> 5238494Sobrien#include <amd.h> 5338494Sobrien 5438494Sobrien/* forward declarations */ 55174294Sobrienstatic int amfs_linkx_mount(am_node *mp, mntfs *mf); 56174294Sobrienstatic int amfs_linkx_umount(am_node *mp, mntfs *mf); 5738494Sobrien 5838494Sobrien/* 5938494Sobrien * linkx operations 6038494Sobrien */ 6138494Sobrienstruct am_ops amfs_linkx_ops = 6238494Sobrien{ 6338494Sobrien "linkx", 6438494Sobrien amfs_link_match, 6538494Sobrien 0, /* amfs_linkx_init */ 6638494Sobrien amfs_linkx_mount, 67174294Sobrien amfs_linkx_umount, 68174294Sobrien amfs_error_lookup_child, 69174294Sobrien amfs_error_mount_child, 7038494Sobrien amfs_error_readdir, 7138494Sobrien 0, /* amfs_linkx_readlink */ 7238494Sobrien 0, /* amfs_linkx_mounted */ 7338494Sobrien 0, /* amfs_linkx_umounted */ 74174294Sobrien amfs_generic_find_srvr, 75174294Sobrien 0, /* amfs_linkx_get_wchan */ 76174294Sobrien FS_MBACKGROUND, 77174294Sobrien#ifdef HAVE_FS_AUTOFS 78174294Sobrien AUTOFS_LINKX_FS_FLAGS, 79174294Sobrien#endif /* HAVE_FS_AUTOFS */ 8038494Sobrien}; 8138494Sobrien 8238494Sobrien 8338494Sobrienstatic int 84174294Sobrienamfs_linkx_mount(am_node *mp, mntfs *mf) 8538494Sobrien{ 8638494Sobrien /* 8738494Sobrien * Check for existence of target. 8838494Sobrien */ 8938494Sobrien struct stat stb; 9038494Sobrien char *ln; 9138494Sobrien 9238494Sobrien if (mp->am_link) 9338494Sobrien ln = mp->am_link; 9438494Sobrien else /* should never occur */ 95174294Sobrien ln = mf->mf_mount; 9638494Sobrien 9738494Sobrien /* 9838494Sobrien * Use lstat, not stat, since we don't 9938494Sobrien * want to know if the ultimate target of 10038494Sobrien * a symlink chain exists, just the first. 10138494Sobrien */ 10238494Sobrien if (lstat(ln, &stb) < 0) 10338494Sobrien return errno; 10438494Sobrien 10538494Sobrien return 0; 10638494Sobrien} 107174294Sobrien 108174294Sobrien 109174294Sobrienstatic int 110174294Sobrienamfs_linkx_umount(am_node *mp, mntfs *mf) 111174294Sobrien{ 112174294Sobrien return 0; 113174294Sobrien} 114