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/* COVERAGE: signal kill tgkill sigprocmask sigaction getpid */
#include <sys/types.h>
#include <unistd.h>
#include <signal.h>
#include <sys/syscall.h>
#ifdef SYS_signal
static void
sig_act_handler(int signo)
{
}
int main()
{
sigset_t mask;
struct sigaction sa;
pid_t pid;
syscall(SYS_signal, SIGUSR1, SIG_IGN);
// signal (SIGUSR1, 0x0+1) = 0
syscall(SYS_signal, SIGUSR1, SIG_DFL);
// signal (SIGUSR1, 0x0+) = 1
syscall(SYS_signal, SIGUSR1, sig_act_handler);
// signal (SIGUSR1, XXXX) = 0
sigemptyset(&mask);
sigaddset(&mask, SIGUSR1);
syscall(SYS_sigprocmask,SIG_BLOCK, &mask, NULL);
// sigprocmask (SIG_BLOCK, XXXX, 0x0+) = 0
syscall(SYS_sigprocmask,SIG_UNBLOCK, &mask, NULL);
// sigprocmask (SIG_UNBLOCK, XXXX, 0x0+) = 0
sa.sa_handler = SIG_IGN;
sigemptyset(&sa.sa_mask);
sigaddset(&sa.sa_mask, SIGALRM);
sa.sa_flags = 0;
syscall(SYS_sigaction,SIGUSR1, &sa, NULL);
// sigaction (SIGUSR1, XXXX, 0x0+) = 0
/* syscall(SYS_kill,0,SIGUSR1);
kill (0, SIGUSR1) = 0
pid = getpid();
getpid () = NNNN
syscall(SYS_tgkill,pid,pid,SIGUSR1);
tgkill (NNNN, NNNN, SIGUSR1) = 0
*/
return 0;
}
#endif
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