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#include <signal.h>

__sighandler_t

__signal (int sig, __sighandler_t handler, int flags)

{

  int ret;

  struct sigaction action, oaction;

  memset(&action, 0, sizeof(struct sigaction));

  action.sa_handler = handler;

  action.sa_flags = flags;

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

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

}

__sighandler_t

signal (int sig, __sighandler_t handler)

{

  return __signal(sig, handler, (SA_ONESHOT | SA_NOMASK | SA_INTERRUPT) & ~SA_RESTART);

}