/* $NetBSD: amfs_linkx.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/amfs_linkx.c * */ /* * Symbol-link file system, with test that the target of the link exists. */ #ifdef HAVE_CONFIG_H # include #endif /* HAVE_CONFIG_H */ #include #include /* forward declarations */ static int amfs_linkx_mount(am_node *mp, mntfs *mf); static int amfs_linkx_umount(am_node *mp, mntfs *mf); /* * linkx operations */ struct am_ops amfs_linkx_ops = { "linkx", amfs_link_match, 0, /* amfs_linkx_init */ amfs_linkx_mount, amfs_linkx_umount, amfs_error_lookup_child, amfs_error_mount_child, amfs_error_readdir, 0, /* amfs_linkx_readlink */ 0, /* amfs_linkx_mounted */ 0, /* amfs_linkx_umounted */ amfs_generic_find_srvr, 0, /* amfs_linkx_get_wchan */ FS_MBACKGROUND, #ifdef HAVE_FS_AUTOFS AUTOFS_LINKX_FS_FLAGS, #endif /* HAVE_FS_AUTOFS */ }; static int amfs_linkx_mount(am_node *mp, mntfs *mf) { /* * Check for existence of target. */ struct stat stb; char *ln; if (mp->am_link) ln = mp->am_link; else /* should never occur */ ln = mf->mf_mount; /* * Use lstat, not stat, since we don't * want to know if the ultimate target of * a symlink chain exists, just the first. */ if (lstat(ln, &stb) < 0) return errno; return 0; } static int amfs_linkx_umount(am_node *mp, mntfs *mf) { return 0; }