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
main(int argc,char * argv[])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 }
45