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Initial import of vim 4.2.

This is meant to replace nvi in the tree.  Vim, in general, works better,
provides more features, and does not suffer from the license problems
being imposed upon nvi.

On the other hand, vim lacks a non-visual ex mode, in addition to open mode.

This includes the GUI (X11) code, but doesn't try to compile it.

/*	$OpenBSD: unixunix.h,v 1.1.1.1 1996/09/07 21:40:27 downsj Exp $	*/
/* vi:set ts=4 sw=4:
 *
 * VIM - Vi IMproved		by Bram Moolenaar
 *
 * Do ":help uganda"  in Vim to read copying and usage conditions.
 * Do ":help credits" in Vim to see a list of people who contributed.
 */

/*
 * unixunix.h -- include files that are only used in unix.c
 */

/*
 * Stuff for signals
 */
#ifdef HAVE_SIGSET
# define signal sigset
#endif

   /* sun's sys/ioctl.h redefines symbols from termio world */
#if defined(HAVE_SYS_IOCTL_H) && !defined(sun)
# include <sys/ioctl.h>
#endif

#ifndef USE_SYSTEM		/* use fork/exec to start the shell */

# if defined(HAVE_SYS_WAIT_H) || defined(HAVE_UNION_WAIT)
#  include <sys/wait.h>
# endif

#if defined(HAVE_SYS_SELECT_H) && \
		(!defined(HAVE_SYS_TIME_H) || defined(SYS_SELECT_WITH_SYS_TIME))
#  include <sys/select.h>
# endif

# ifndef WEXITSTATUS
#  ifdef HAVE_UNION_WAIT
#   define WEXITSTATUS(stat_val) ((stat_val).w_T.w_Retcode)
#  else
#   define WEXITSTATUS(stat_val) (((stat_val) >> 8) & 0377)
#  endif
# endif

# ifndef WIFEXITED
#  ifdef HAVE_UNION_WAIT
#   define WIFEXITED(stat_val) ((stat_val).w_T.w_Termsig == 0)
#  else
#   define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
#  endif
# endif

#endif /* !USE_SYSTEM */

#ifdef HAVE_STROPTS_H
# include <stropts.h>
#endif

#ifdef HAVE_STRING_H
# include <string.h>
#endif

#ifndef HAVE_SELECT
# ifdef HAVE_SYS_POLL_H
#  include <sys/poll.h>
# else
#  include <poll.h>
# endif
#endif

#ifdef HAVE_SYS_STREAM_H
# include <sys/stream.h>
#endif

#ifdef HAVE_SYS_PTEM_H
# include <sys/ptem.h>
# ifndef _IO_PTEM_H			/* For UnixWare that should check for _IO_PT_PTEM_H */
#  define _IO_PTEM_H
# endif
#endif

#ifdef HAVE_SYS_UTSNAME_H
# include <sys/utsname.h>
#endif

#ifdef HAVE_SYS_SYSTEMINFO_H
/*
 * foolish Sinix <sys/systeminfo.h> uses SYS_NMLN but doesn't include
 * limits.h>, where it is defined. Perhaps other systems have the same
 * problem? Include it here. -- Slootman
 */
# if defined(HAVE_LIMITS_H) && !defined(_LIMITS_H)
#  include <limits.h>           /* for SYS_NMLN (Sinix 5.41 / Unix SysV.4) */
# endif
# include <sys/systeminfo.h>	/* for sysinfo */
#endif

/*
 * We use termios.h if both termios.h and termio.h are available.
 * Termios is supposed to be a superset of termio.h.  Don't include them both,
 * it may give problems on some systems (e.g. hpux).
 * I don't understand why we don't want termios.h for apollo.
 */
#if defined(HAVE_TERMIOS_H) && !defined(apollo)
#  include <termios.h>
#else
# ifdef HAVE_TERMIO_H
#  include <termio.h>
# else
#  ifdef HAVE_SGTTY_H
#   include <sgtty.h>
#  endif
# endif
#endif