/*****************************************************************
 *    signal handling
 */

#ifdef SIGVOID
# define SIGRETURN
# define sigret_t void
#else
# define SIGRETURN return 0;
# define sigret_t int
#endif

/* Geeeee, reverse it? */
#if defined(SVR4) || (defined(SYSV) && defined(ISC)) || defined(_AIX) || defined(linux) || defined(ultrix) || defined(__386BSD__) || defined(BSDI) || defined(POSIX) || defined(NeXT)
# define SIGHASARG
#endif

#ifdef SIGHASARG
# define SIGPROTOARG   (int)
# define SIGDEFARG     (sigsig) int sigsig;
# define SIGARG        0
#else
# define SIGPROTOARG   (void)
# define SIGDEFARG     ()
# define SIGARG
#endif

#ifndef SIGCHLD
#define SIGCHLD SIGCLD
#endif

#if defined(POSIX) || defined(hpux)
# define signal xsignal
#else
# ifdef USESIGSET
#  define signal sigset
# endif /* USESIGSET */
#endif

/* used in screen.c and attacher.c */
#ifndef NSIG		/* kbeal needs these w/o SYSV */
# define NSIG 32
#endif /* !NSIG */