| Elliott Hughes | 5dec78d | 2014-02-26 15:56:23 -0800 | [diff] [blame] | 1 | #include <stdio.h> |
| 2 | #include <stdlib.h> |
| 3 | #include <signal.h> |
| 4 | #include <sys/procfs.h> |
| 5 | #include <sys/stropts.h> |
| 6 | #include <poll.h> |
| 7 | |
| 8 | int main(int argc, char *argv[]) |
| 9 | { |
| 10 | int pid; |
| 11 | char proc[32]; |
| 12 | FILE *pfp; |
| 13 | struct pollfd pfd; |
| 14 | |
| 15 | pid = fork(); |
| 16 | if (pid == 0) { |
| 17 | pause(); |
| 18 | exit(0); |
| 19 | } |
| 20 | |
| 21 | sprintf(proc, "/proc/%d", pid); |
| 22 | |
| 23 | pfp = fopen(proc, "r+"); |
| 24 | if (pfp == NULL) |
| 25 | goto fail; |
| 26 | |
| 27 | if (ioctl(fileno(pfp), PIOCSTOP, NULL) < 0) |
| 28 | goto fail; |
| 29 | |
| 30 | pfd.fd = fileno(pfp); |
| 31 | pfd.events = POLLPRI; |
| 32 | |
| 33 | if (poll(&pfd, 1, 0) < 0) |
| 34 | goto fail; |
| 35 | |
| 36 | if (!(pfd.revents & POLLPRI)) |
| 37 | goto fail; |
| 38 | |
| 39 | kill(pid, SIGKILL); |
| 40 | exit(0); |
| 41 | fail: |
| 42 | kill(pid, SIGKILL); |
| 43 | exit(1); |
| 44 | } |