fusl/src/signal/siginterrupt.c

#include <signal.h>

int siginterrupt(int sig, int flag) {
  struct sigaction sa;

  sigaction(sig, 0, &sa);
  if (flag)
    sa.sa_flags &= ~SA_RESTART;
  else
    sa.sa_flags |= SA_RESTART;

  return sigaction(sig, &sa, 0);
}