github.com/afumu/libc@v0.0.6/musl/src/signal/sigrelse.c (about)

     1  #include <signal.h>
     2  
     3  int sigrelse(int sig)
     4  {
     5  	sigset_t mask;
     6  
     7  	sigemptyset(&mask);
     8  	if (sigaddset(&mask, sig) < 0) return -1;
     9  	return sigprocmask(SIG_UNBLOCK, &mask, 0);
    10  }