/* $NetBSD: amfs_auto.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_auto.c * */ /* * Automount file system */ #ifdef HAVE_CONFIG_H # include #endif /* HAVE_CONFIG_H */ #include #include /**************************************************************************** *** 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) { if (mp->am_parent == NULL) return EINVAL; /* * 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_al->al_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 = xstrdup(""); } else { /* * the prefix specified as an option */ mp->am_pref = xstrdup(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 *) NULL, 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; }