1 /* Ltrace Test : signals.c. 2 Objectives : Verify that ltrace can trace user defined signal. 3 This file was written by Yao Qi <qiyao (at) cn.ibm.com>. */ 4 5 #include<stdio.h> 6 #include<signal.h> 7 #include <sys/types.h> 8 9 #define LOOP 20 10 11 void 12 handler(int signum,siginfo_t *info,void *act) 13 { 14 } 15 16 int 17 main () 18 { 19 struct sigaction act; 20 union sigval mysigval; 21 int i; 22 int sig; 23 pid_t pid; 24 25 mysigval.sival_int=0; 26 sig = SIGUSR1; 27 pid=getpid(); 28 29 sigemptyset(&act.sa_mask); 30 act.sa_sigaction=handler; 31 act.sa_flags=SA_SIGINFO; 32 33 if(sigaction(sig,&act,NULL) < 0) 34 { 35 printf("install sigal error\n"); 36 } 37 38 for(i=0; i< LOOP; i++) 39 { 40 usleep(100); 41 sigqueue(pid,sig,mysigval); 42 } 43 return 0; 44 } 45
