diff options
Diffstat (limited to 'trunk/qpid/cpp/src/qpid/cluster/qpidd_watchdog.cpp')
-rw-r--r-- | trunk/qpid/cpp/src/qpid/cluster/qpidd_watchdog.cpp | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/trunk/qpid/cpp/src/qpid/cluster/qpidd_watchdog.cpp b/trunk/qpid/cpp/src/qpid/cluster/qpidd_watchdog.cpp new file mode 100644 index 0000000000..51c5ed4b3f --- /dev/null +++ b/trunk/qpid/cpp/src/qpid/cluster/qpidd_watchdog.cpp @@ -0,0 +1,63 @@ +/* + * + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + * + */ + +/** @file helper executable for WatchDogPlugin.cpp */ + +#include <sys/types.h> +#include <sys/time.h> +#include <signal.h> +#include <unistd.h> +#include <stdlib.h> +#include <stdio.h> +#include <limits.h> + +long timeout; + +void killParent(int) { + ::kill(getppid(), SIGKILL); + ::fprintf(stderr, "Watchdog killed unresponsive broker, pid=%d\n", ::getppid()); + ::exit(1); +} + +void resetTimer(int) { + struct ::itimerval itval = { { 0, 0 }, { timeout, 0 } }; + if (::setitimer(ITIMER_REAL, &itval, 0) !=0) { + ::perror("Watchdog failed to set timer"); + killParent(0); + ::exit(1); + } +} + +/** Simple watchdog program: kill parent process if timeout + * expires without a SIGUSR1. + * Will be killed with SIGHUP when parent shuts down. + * Args: timeout in seconds. + */ +int main(int argc, char** argv) { + if(argc != 2 || (timeout = atoi(argv[1])) == 0) { + ::fprintf(stderr, "Usage: %s <timeout_seconds>\n", argv[0]); + ::exit(1); + } + ::signal(SIGUSR1, resetTimer); + ::signal(SIGALRM, killParent); + resetTimer(0); + while (true) { sleep(INT_MAX); } +} |