fitzhardinge | 31ba905 | 2004-01-16 02:15:23 +0000 | [diff] [blame] | 1 | #include <stdio.h> |
| 2 | #include <unistd.h> |
| 3 | #include <signal.h> |
| 4 | #include <errno.h> |
| 5 | #include <sys/wait.h> |
| 6 | #include <string.h> |
| 7 | |
| 8 | /* Make sure that a blocking syscall returns EINTR if hit by a signal, |
| 9 | and there's no SA_RESTART */ |
| 10 | |
| 11 | static void handler(int s) |
| 12 | { |
| 13 | } |
| 14 | |
| 15 | int main() |
| 16 | { |
| 17 | int pid; |
| 18 | int fds[2]; |
| 19 | |
| 20 | if (pipe(fds) == -1) { |
| 21 | perror("FAIL: pipe\n"); |
| 22 | return 1; |
| 23 | } |
| 24 | |
| 25 | pid = fork(); |
| 26 | |
| 27 | if (pid == -1) { |
| 28 | perror("fork failed"); |
| 29 | return 1; |
| 30 | } |
| 31 | |
| 32 | if (pid == 0) { |
| 33 | char ch = '?'; |
| 34 | int ret; |
| 35 | struct sigaction sa; |
| 36 | |
| 37 | sa.sa_handler = handler; |
| 38 | sigfillset(&sa.sa_mask); |
| 39 | sa.sa_flags = 0; /* no SA_RESTART */ |
| 40 | |
| 41 | sigaction(SIGUSR1, &sa, NULL); |
| 42 | |
| 43 | close(fds[1]); |
| 44 | ret = read(fds[0], &ch, 1); |
| 45 | |
| 46 | if (ret != -1 || errno != EINTR) |
| 47 | fprintf(stderr, "FAIL: expected EINTR, not %d/%s/%c\n", |
| 48 | ret, strerror(errno), ch); |
| 49 | } else { |
| 50 | signal(SIGPIPE, SIG_IGN); |
| 51 | |
| 52 | close(fds[0]); |
| 53 | sleep(1); |
| 54 | kill(pid, SIGUSR1); |
| 55 | sleep(1); |
| 56 | if (write(fds[1], "x", 1) != -1 || errno != EPIPE) |
| 57 | fprintf(stderr, "FAIL: expected write to fail with EPIPE\n"); |
| 58 | |
| 59 | waitpid(pid, NULL, 0); |
| 60 | } |
| 61 | |
| 62 | return 0; |
| 63 | } |