1 #include <stdio.h> 2 #include <signal.h> 3 #include <unistd.h> 4 #include <stdlib.h> 5 6 static int sigalrm_received = 0; 7 static void sigalrm_handler(int signr) 8 { 9 sigalrm_received++; 10 } 11 static int sigrtmin_received = 0; 12 static void sigrtmin_handler(int signr) 13 { 14 sigrtmin_received++; 15 } 16 17 static int breakme = 0; 18 #ifndef SIGRTMIN 19 // at least on MacOS, there is no SIGRTMIN. 20 // So, use any other signal instead. 21 #define SIGRTMIN SIGUSR1 22 #endif 23 24 int main (int argc, char *argv[]) 25 { 26 struct sigaction sa; 27 fprintf(stderr, "starting ...\n"); 28 sa.sa_handler = sigalrm_handler; 29 sigemptyset(&sa.sa_mask); 30 sa.sa_flags = 0; 31 32 if (sigaction (SIGALRM, &sa, NULL) != 0) 33 perror("sigaction"); 34 if (kill(getpid(), SIGALRM) != 0) 35 perror("kill 1"); 36 37 if (sigalrm_received == 1) 38 fprintf (stderr, "ok: 1st SIGALRM received\n"); 39 else 40 fprintf (stderr, "wrong 1st: unexpected value %d sigalrm_received\n", 41 sigalrm_received); 42 43 if (kill(getpid(), SIGALRM) != 0) 44 perror("kill 2"); 45 46 if (sigalrm_received == 2) 47 fprintf (stderr, "ok: 2nd SIGALRM received\n"); 48 else 49 fprintf (stderr, "wrong 2nd: unexpected value %d sigalrm_received\n", 50 sigalrm_received); 51 52 system("../tests/true"); 53 breakme++; 54 55 sa.sa_handler = sigrtmin_handler; 56 sigemptyset(&sa.sa_mask); 57 sa.sa_flags = 0; 58 59 if (sigaction (SIGRTMIN, &sa, NULL) != 0) 60 perror("sigaction"); 61 if (kill(getpid(), SIGRTMIN) != 0) 62 perror("kill sigrtmin"); 63 if (sigrtmin_received == 1) 64 fprintf (stderr, "ok: SIGRTMIN received\n"); 65 else 66 fprintf (stderr, "wrong sigrtmin: unexpected value %d sigrtmin_received\n", 67 sigrtmin_received); 68 return 0; 69 } 70
