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#define __USE_BSD_SIGNAL

#include <signal.h>

#undef signal

/* The `sig' bit is set if the interrupt on it

 * is enabled via siginterrupt (). */

extern sigset_t _sigintr;

__sighandler_t

__bsd_signal (int sig, __sighandler_t handler)

{

  int ret;

  struct sigaction action, oaction;

  action.sa_handler = handler;

  __sigemptyset (&action.sa_mask);

  if (!__sigismember (&_sigintr, sig)) {

#ifdef SA_RESTART

    action.sa_flags = SA_RESTART;

#else

    action.sa_flags = 0;

#endif

  }

  else {

#ifdef SA_INTERRUPT

    action.sa_flags = SA_INTERRUPT;

#else

    action.sa_flags = 0;

#endif

  }

  ret = __sigaction (sig, &action, &oaction);

  return (ret == -1) ? SIG_ERR : oaction.sa_handler;

}