#include <sys/types.h>

#include <unistd.h>

#include <signal.h>

#include <errno.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

// 由于glibc的bug,此处需要将gettid如下

#include <sys/syscall.h>

#define gettid() syscall(SYS_gettid)

void handler(int signo) {

if (signo == SIGINT) {

printf("%ld ", gettid());

printf("recv SIGINT signo=%d\n", signo);

} else if (signo == SIGRTMIN) {

printf("%ld ", gettid());

printf("recv SIGRTMIN signo=%d\n", signo);

} else if (signo == SIGUSR1) {

sigset_t s;

sigemptyset(&s);

sigaddset(&s, SIGINT);

sigaddset(&s, SIGRTMIN);

sigprocmask(SIG_UNBLOCK, &s, NULL);

printf("%ld ", gettid());

printf(" SIGUSR1 unblock signal.\n");

} else {

printf("%ld ", gettid());

printf("recv other signo=%d\n", signo);

}

return;

}

int main(int argc, char* argv[]) {

extern int errno;

pid_t pid = getpid();

printf("%d\n", pid);

struct sigaction act;

act.sa_handler = handler;

sigemptyset(&act.sa_mask);

act.sa_flags = 0;

sigset_t s;

sigemptyset(&s);

sigaddset(&s, SIGINT);

sigaddset(&s, SIGRTMIN);

sigprocmask(SIG_BLOCK, &s, NULL);

sigaction(SIGINT, &act, NULL);

sigaction(SIGRTMIN, &act, NULL);

sigaction(SIGUSR1, &act, NULL);

for( ; ; ) {

pause();

}

return 0;

}