1 2 #include <errno.h> 3 #include <stdio.h> 4 #include <signal.h> 5 #include <stdlib.h> 6 7 static void 8 abend (int sig) 9 { 10 printf ("Abended on signal %d\n", sig); 11 exit (2); 12 } 13 14 int 15 main (void) 16 { 17 struct sigaction sa; 18 19 int i; 20 int rc; 21 for (i = 1; i <= 65; i++) { 22 // Skip signals 32 and 33, since these are used by LinuxThreads. Some 23 // glibc versions do not invoke the sigaction system call for these 24 // signals. 25 // skip signals 63 and 64: some systems say "warning, ignored attempt 26 // to catch 32 because it's used internally by Valgrind", others say 27 // "invalid argument". 28 if (i == 32 || i == 33 || i == 63 || i == 64) { 29 continue; 30 } // different systems 31 sa.sa_flags = 0; 32 sigemptyset( &sa.sa_mask ); 33 sa.sa_handler = abend; 34 fprintf(stderr,"setting signal %d: ", i); 35 rc = sigaction (i /*SIGKILL*/, &sa, NULL); 36 if (rc) perror (""); 37 else fprintf(stderr,"Success\n"); 38 fprintf(stderr,"getting signal %d: ", i); 39 rc = sigaction (i /*SIGKILL*/, NULL, &sa); 40 if (rc) perror (""); 41 else fprintf(stderr,"Success\n"); 42 fprintf(stderr,"\n"); 43 } 44 return 0; 45 } 46
