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/* ----------------------------------------------------------------------- *
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*
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* lookup_userhome.c - module for Linux automount to generate symlinks
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* to user home directories
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*
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* Copyright 1999 Transmeta Corporation - All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, Inc., 675 Mass Ave, Cambridge MA 02139,
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* USA; either version 2 of the License, or (at your option) any later
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* version; incorporated herein by reference.
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*
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* ----------------------------------------------------------------------- */
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#include <stdio.h>
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#include <malloc.h>
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#include <pwd.h>
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#include <string.h>
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#define MODULE_LOOKUP
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#include "automount.h"
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#include "nsswitch.h"
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#define MODPREFIX "lookup(userhome): "
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int lookup_version = AUTOFS_LOOKUP_VERSION; /* Required by protocol */
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int lookup_init(const char *mapfmt,
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int argc, const char *const *argv, void **context)
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{
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return 0; /* Nothing to do */
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}
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int lookup_reinit(const char *mapfmt,
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int argc, const char *const *argv, void **context)
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{
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return 0; /* Nothing to do */
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}
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int lookup_read_master(struct master *master, time_t age, void *context)
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{
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return NSS_STATUS_UNKNOWN;
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}
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int lookup_read_map(struct autofs_point *ap, time_t age, void *context)
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{
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ap->entry->current = NULL;
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master_source_current_signal(ap->entry);
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return NSS_STATUS_UNKNOWN;
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}
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int lookup_mount(struct autofs_point *ap, const char *name, int name_len, void *context)
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{
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struct map_source *source;
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struct mapent_cache *mc;
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struct passwd *pw;
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char buf[MAX_ERR_BUF];
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int ret;
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source = ap->entry->current;
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ap->entry->current = NULL;
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master_source_current_signal(ap->entry);
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mc = source->mc;
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debug(ap->logopt, MODPREFIX "looking up %s", name);
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/* Get the equivalent username */
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pw = getpwnam(name);
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if (!pw) {
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warn(ap->logopt, MODPREFIX "not found: %s", name);
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return NSS_STATUS_NOTFOUND; /* Unknown user or error */
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}
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/* Create the appropriate symlink */
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if (chdir(ap->path)) {
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char *estr = strerror_r(errno, buf, MAX_ERR_BUF);
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logerr(MODPREFIX "chdir failed: %s", estr);
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return NSS_STATUS_UNAVAIL;
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}
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cache_writelock(mc);
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ret = cache_update(mc, source, name, NULL, monotonic_time(NULL));
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cache_unlock(mc);
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if (ret == CHE_FAIL) {
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ret = chdir("/");
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return NSS_STATUS_UNAVAIL;
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}
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if (symlink(pw->pw_dir, name) && errno != EEXIST) {
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char *estr = strerror_r(errno, buf, MAX_ERR_BUF);
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logerr(MODPREFIX "symlink failed: %s", estr);
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return NSS_STATUS_UNAVAIL;
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}
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ret = chdir("/");
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return NSS_STATUS_SUCCESS;
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}
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int lookup_done(void *context)
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{
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return 0;
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}
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