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#include <signal.h> /* sigemptyset(), sigaction(), kill(), SIGUSR1 */
#include <stdlib.h> /* exit() */
#include <unistd.h> /* getpid() */
#include <errno.h> /* errno */
#include <stdio.h> /* fprintf() */
static void mysig_handler(int sig) {
exit(2);
}
int main() {
/* setup sig handler */
struct sigaction sa;
sa.sa_handler = mysig_handler;
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
if (sigaction(SIGCHLD, &sa, NULL)) {
fprintf(stderr, "could not set signal handler %d, aborted\n", errno);
exit(1);
}
kill(getpid(), SIGCHLD);
return 0;
}
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