source: azure_iot_hub/trunk/musl-1.1.18/src/signal/sighold.c@ 389

#include <signal.h>

int sighold(int sig)
{
        sigset_t mask;

        sigemptyset(&mask);
        if (sigaddset(&mask, sig) < 0) return -1;
        return sigprocmask(SIG_BLOCK, &mask, 0);
}