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 } 45
