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/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <errno.h>
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#include <fcntl.h>
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#include <linux/watchdog.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/ioctl.h>
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//#include <android-base/logging.h>
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#define DEV_NAME "/dev/watchdog0"
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int main(int argc, char** argv) {
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// android::base::InitLogging(argv, &android::base::KernelLogger);
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int interval = 10;
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if (argc >= 2) interval = atoi(argv[1]);
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int margin = 10;
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if (argc >= 3) margin = atoi(argv[2]);
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printf("watchdogd started (interval %d , margin %d\n",interval, margin);
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int fd = open(DEV_NAME, O_RDWR | O_CLOEXEC);
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if (fd == -1) {
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// PLOG(ERROR) << "Failed to open " << DEV_NAME;
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printf("Failed to open %s\n",DEV_NAME);
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return 1;
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}
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int timeout = interval + margin;
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int ret = ioctl(fd, WDIOC_SETTIMEOUT, &timeout);
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if (ret) {
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// PLOG(ERROR) << "Failed to set timeout to " << timeout;
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printf("Failed to set timeout to %d\n",timeout);
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ret = ioctl(fd, WDIOC_GETTIMEOUT, &timeout);
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if (ret) {
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// PLOG(ERROR) << "Failed to get timeout";
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printf("Failed to get timeout\n");
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} else {
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if (timeout > margin) {
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interval = timeout - margin;
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} else {
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interval = 1;
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}
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// LOG(WARNING) << "Adjusted interval to timeout returned by driver: "
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// << "timeout " << timeout << ", interval " << interval << ", margin "
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// << margin;
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printf("Adjusted interval to timeout returned by driver: timeout %d, interval %d, margin %d\n",timeout, interval, margin);
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}
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}
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while (true) {
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write(fd, "", 1);
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sleep(interval);
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}
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}
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