| // Copyright 2023 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include <fcntl.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| |
| // This simple program is used for the |
| // RobustFutexTest.FutexStateAfterExecCheck test. That test ensures that robust |
| // futexes are notified when an exec happens. Because robust futexes are also |
| // notified when the process exits, we wait until the test is finished before |
| // exiting the process. We notify the test that we have started by printing |
| // "ready" to stdout. The test indicates that it has finished checking the futex value |
| // by unlocking the file provided in argv[1], at which point this process can exit. |
| int main(int argc, char** argv) { |
| if (argc < 2) { |
| return 1; |
| } |
| fprintf(stdout, "ready"); |
| int fd = open(argv[1], O_RDWR | O_CREAT | O_TRUNC, 0777); |
| struct flock fl = {.l_type = F_WRLCK, .l_whence = SEEK_SET, .l_start = 0, .l_len = 0}; |
| fcntl(fd, F_SETLK, &fl); |
| } |
