78 lines
1.7 KiB
C++
78 lines
1.7 KiB
C++
/*
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Copyright 2025 Yağız Zengin
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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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http://www.apache.org/licenses/LICENSE-2.0
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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 <unistd.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <iostream>
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#include <list>
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#define LOG_TAG "disable_watchdog"
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#include <android/log.h>
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#include <android/log_macros.h>
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bool suspendWatchdog(std::list<const char*> files)
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{
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bool suspendOk = false;
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for (const auto& file : files) {
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int fd = open(file, O_WRONLY);
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if (fd == -1) {
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if (errno == ENOENT) {
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int last = errno;
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fd = open(file, O_WRONLY | O_CREAT, 644);
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if (fd == -1) {
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ALOGW("Cannot create %s: %s\n", file, strerror(errno));
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continue;
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}
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} else {
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ALOGW("Cannot open %s: %s\n", file, strerror(errno));
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continue;
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}
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}
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char ch = 'V';
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if (write(fd, &ch, 1) != 1) {
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ALOGW("Cannot write %s: %s\n", file, strerror(errno));
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close(fd);
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continue;
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}
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suspendOk = true;
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ALOGI("%s: successfully suspended.\n", file);
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close(fd);
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}
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return suspendOk;
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}
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int main(void)
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{
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ALOGI("Service started.\n");
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while (1) {
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if (!suspendWatchdog({"/dev/watchdog1", "/dev/watchdog0", "/dev/watchdog"})) {
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ALOGE("watchdog suspend fail!\n");
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break;
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}
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sleep(8);
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}
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ALOGI("Service stopped!\n");
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return 1;
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}
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