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diff --git a/src/handler.c b/src/handler.c
index fe0435b..719fc4c 100644
--- a/src/handler.c
+++ b/src/handler.c
@@ -1,68 +1,70 @@
/*
* Copyright (C) 2014 Philipp Marek <philipp.marek@linbit.com>
*
* 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 2.1 of the License, or (at your option) any later version.
*
* This software 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 library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <arpa/inet.h>
#include <inttypes.h>
#include <stdio.h>
#include <assert.h>
#include <time.h>
#include "ticket.h"
#include "config.h"
#include "inline-fn.h"
#include "log.h"
#include "pacemaker.h"
#include "booth.h"
#include "handler.h"
/** Runs an external handler.
* See eg. 'before-acquire-handler'.
* TODO: timeout, async operation?. */
int run_handler(struct ticket_config *tk,
const char *cmd, int synchronous)
{
int rv;
char expires[16];
+ if (!cmd)
+ return 0;
assert(synchronous);
sprintf(expires, "%" PRId64, tk->term_expires);
rv = setenv("BOOTH_TICKET", tk->name, 1) ||
setenv("BOOTH_LOCAL", local->addr_string, 1) ||
setenv("BOOTH_CONF_NAME", booth_conf->name, 1) ||
setenv("BOOTH_CONF_PATH", cl.configfile, 1) ||
setenv("BOOTH_TICKET_EXPIRES", expires, 1);
if (rv) {
log_error("Cannot set environment: %d", errno);
} else {
rv = system(cmd);
if (rv)
log_error("Error calling \"%s\": %s",
cmd, interpret_rv(rv));
else
log_info("Ran \"%s\" successfully.", cmd);
}
return rv;
}

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