signal/bsd_signal

[Ulrich Drepper]

What's the correct BSD behavior of signal?  The current standard draft
says that bsd_signal (what we also call signal) can be implemented
with:

  void (*bsd_signal(int sig, void (*funct)(int)))(int)
  {
    struct sigaction act, oact;
    act.sa_handler = func;
    act.sa_flags = SA_RESTART;
    sigemptyset(&act.sa_mask);
    sigaddset(&act.sa_mask, sig);
    if (sigaction(sig, &act, &oact) == -1)
      return(SIG_ERR);
    return(oact.sa_handler);
  }

This is basically what we habe except that we don't habe the
sigaddset() call.  Do we have to add it or not?  Define signal and
bsd_signal separately?

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