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