| #include <stdio.h> |
| #include <unistd.h> |
| #include <signal.h> |
| #include <errno.h> |
| #include <sys/wait.h> |
| #include <string.h> |
| |
| /* Make sure that a blocking syscall returns EINTR if hit by a signal, |
| and there's no SA_RESTART */ |
| |
| static void handler(int s) |
| { |
| } |
| |
| int main() |
| { |
| int pid; |
| int fds[2]; |
| |
| if (pipe(fds) == -1) { |
| perror("FAIL: pipe\n"); |
| return 1; |
| } |
| |
| pid = fork(); |
| |
| if (pid == -1) { |
| perror("fork failed"); |
| return 1; |
| } |
| |
| if (pid == 0) { |
| char ch = '?'; |
| int ret; |
| struct sigaction sa; |
| |
| sa.sa_handler = handler; |
| sigfillset(&sa.sa_mask); |
| sa.sa_flags = 0; /* no SA_RESTART */ |
| |
| sigaction(SIGUSR1, &sa, NULL); |
| |
| close(fds[1]); |
| ret = read(fds[0], &ch, 1); |
| |
| if (ret != -1 || errno != EINTR) |
| fprintf(stderr, "FAIL: expected EINTR, not %d/%s/%c\n", |
| ret, strerror(errno), ch); |
| } else { |
| signal(SIGPIPE, SIG_IGN); |
| |
| close(fds[0]); |
| sleep(1); |
| kill(pid, SIGUSR1); |
| sleep(1); |
| if (write(fds[1], "x", 1) != -1 || errno != EPIPE) |
| fprintf(stderr, "FAIL: expected write to fail with EPIPE, not %d\n", errno); |
| |
| waitpid(pid, NULL, 0); |
| } |
| |
| return 0; |
| } |