initscr.c

<B>Digital的Unix操作系统VAX 4.2源码</B>

#ifndef lint
static	char	*sccsid = "@(#)initscr.c	4.1	(ULTRIX)	7/2/90";
#endif lint

/************************************************************************
 *									*
 *			Copyright (c) 1984 by				*
 *		Digital Equipment Corporation, Maynard, MA		*
 *			All rights reserved.				*
 *									*
 *   This software is furnished under a license and may be used and	*
 *   copied  only  in accordance with the terms of such license and	*
 *   with the  inclusion  of  the  above  copyright  notice.   This	*
 *   software  or  any  other copies thereof may not be provided or	*
 *   otherwise made available to any other person.  No title to and	*
 *   ownership of the software is hereby transferred.			*
 *									*
 *   This software is  derived  from  software  received  from  the	*
 *   University    of   California,   Berkeley,   and   from   Bell	*
 *   Laboratories.  Use, duplication, or disclosure is  subject  to	*
 *   restrictions  under  license  agreements  with  University  of	*
 *   California and with AT&T.						*
 *									*
 *   The information in this software is subject to change  without	*
 *   notice  and should not be construed as a commitment by Digital	*
 *   Equipment Corporation.						*
 *									*
 *   Digital assumes no responsibility for the use  or  reliability	*
 *   of its software on equipment which is not supplied by Digital.	*
 *									*
 ************************************************************************/
# include	"curses.ext"
# include	<signal.h>
# include	<sys/param.h>

extern char	*getenv();

/*
 *	This routine initializes the current and standard screen.
 *
 * 5/19/83 (Berkeley) @(#)initscr.c	1.3
 */
WINDOW *
initscr() {

	reg char	*sp;
	void		(*oldtstp)();
	void		tstp();

# ifdef DEBUG
	fprintf(outf, "INITSCR()\n");
# endif
	if (My_term)
		setterm(Def_term);
	else {
		if (isatty(2))
			_tty_ch = 2;
		else {
			for (_tty_ch = 0; _tty_ch < NOFILE; _tty_ch++)
				if (isatty(_tty_ch))
					break;
		}
		gettmode();
		if ((sp = getenv("TERM")) == NULL)
			sp = Def_term;
		setterm(sp);
# ifdef DEBUG
		fprintf(outf, "INITSCR: term = %s\n", sp);
# endif
	}
	_puts(TI);
	_puts(VS);
# ifdef SIGTSTP
	if ((oldtstp = signal(SIGTSTP, tstp)) != SIG_DFL)
		(void) signal(SIGTSTP, oldtstp);
# endif
	if (curscr != NULL) {
# ifdef DEBUG
		fprintf(outf, "INITSCR: curscr = 0%o\n", curscr);
# endif
		delwin(curscr);
	}
# ifdef DEBUG
	fprintf(outf, "LINES = %d, COLS = %d\n", LINES, COLS);
# endif
	if ((curscr = newwin(LINES, COLS, 0, 0)) == ERR)
		return ERR;
	curscr->_clear = TRUE;
	if (stdscr != NULL) {
# ifdef DEBUG
		fprintf(outf, "INITSCR: stdscr = 0%o\n", stdscr);
# endif
		delwin(stdscr);
	}
	stdscr = newwin(LINES, COLS, 0, 0);
	return stdscr;
}