/*
* ProFTPD - FTP server daemon
* Copyright (c) 1997, 1998 Public Flood Software
* Copyright (c) 1999, 2000 MacGyver aka Habeeb J. Dihu <macgyver@tos.net>
* Copyright (c) 2001, 2002, 2003 The ProFTPD Project team
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*
* As a special exemption, Public Flood Software/MacGyver aka Habeeb J. Dihu
* and other respective copyright holders give permission to link this program
* with OpenSSL, and distribute the resulting executable, without including
* the source code for OpenSSL in the source distribution.
*/
/*
* Regex management code
* $Id: regexp.c,v 1.13 2004/09/05 00:38:14 castaglia Exp $
*/
#include "conf.h"
#ifdef HAVE_REGEX_H
static pool *regexp_pool = NULL;
static array_header *regexp_list = NULL;
static void regexp_cleanup(void) {
/* Only perform this cleanup if necessary */
if (regexp_pool) {
register unsigned int i = 0;
regex_t **regexp = (regex_t **) regexp_list->elts;
for (i = 0; i < regexp_list->nelts; i++) {
if (regexp[i]) {
/* This frees memory associated with this pointer by regcomp(3). */
regfree(regexp[i]);
/* This frees the memory allocated for the pointer itself. */
free(regexp[i]);
}
}
destroy_pool(regexp_pool);
regexp_pool = NULL;
regexp_list = NULL;
}
}
static void regexp_exit_ev(const void *event_data, void *user_data) {
regexp_cleanup();
return;
}
static void regexp_restart_ev(const void *event_data, void *user_data) {
regexp_cleanup();
return;
}
regex_t *pr_regexp_alloc(void) {
regex_t *preg = NULL;
/* If no regex-tracking list has been allocated, create one. Register a
* cleanup handler for this pool, to call regfree(3) on all regex_t pointers
* in the list.
*/
if (!regexp_pool) {
regexp_pool = make_sub_pool(permanent_pool);
pr_pool_tag(regexp_pool, "Regexp Pool");
regexp_list = make_array(regexp_pool, 0, sizeof(regex_t *));
}
preg = calloc(1, sizeof(regex_t));
if (preg == NULL) {
pr_log_pri(PR_LOG_ERR, "fatal: memory exhausted");
exit(1);
}
/* Add this pointer to the array. */
*((regex_t **) push_array(regexp_list)) = preg;
return preg;
}
void pr_regexp_free(regex_t *regex) {
register unsigned int i = 0;
regex_t **regexp = NULL;
if (!regex || !regexp_list)
return;
regexp = (regex_t **) regexp_list->elts;
for (i = 0; i < regexp_list->nelts; i++) {
if (regexp[i] == regex) {
/* This frees memory associated with this pointer by regcomp(3). */
regfree(regexp[i]);
/* This frees the memory allocated for the pointer itself. */
free(regexp[i]);
regexp[i] = NULL;
}
}
}
void init_regexp(void) {
/* Register a restart handler for the regexp pool, so that when restarting,
* regfree(3) is called on each of the regex_t pointers in a
* regex_t-tracking array, thus preventing memory leaks on a long-running
* daemon.
*
* This registration is done here so that it only happens once.
*/
pr_event_register(NULL, "core.restart", regexp_restart_ev, NULL);
pr_event_register(NULL, "core.exit", regexp_exit_ev, NULL);
}
#endif
Last Updated: Thu Feb 23 11:07:21 2006
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