usr/src/lib/libcurses/initscr.c

/*
 * Copyright (c) 1981 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
static char sccsid[] = "@(#)initscr.c   5.6 (Berkeley) 3/3/91";
#endif /* not lint */

# include       "curses.ext"
# include       <signal.h>

extern char     *getenv();

/*
 *      This routine initializes the current and standard screen.
 *
 */
WINDOW *
initscr() {

        reg char        *sp;
        void            tstp();

# ifdef DEBUG
        fprintf(outf, "INITSCR()\n");
# endif
        if (My_term)
                setterm(Def_term);
        else {
                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
        signal(SIGTSTP, tstp);
# 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;
        clearok(curscr, TRUE);
        curscr->_flags &= ~_FULLLINE;
        if (stdscr != NULL) {
# ifdef DEBUG
                fprintf(outf, "INITSCR: stdscr = 0%o\n", stdscr);
# endif
                delwin(stdscr);
        }
        stdscr = newwin(LINES, COLS, 0, 0);
        return stdscr;
}