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+/*
+ * Copyright (c) 1981, 1993
+ * The 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 8.1 (Berkeley) 6/4/93";
+#endif /* not lint */
+
+#include <curses.h>
+#include <signal.h>
+#include <stdlib.h>
+
+/*
+ * initscr --
+ * Initialize the current and standard screen.
+ */
+WINDOW *
+initscr()
+{
+ register char *sp;
+
+#ifdef DEBUG
+ __CTRACE("initscr\n");
+#endif
+ __echoit = 1;
+ __pfast = __rawmode = __noqch = 0;
+
+ if (gettmode() == ERR)
+ return (NULL);
+
+ /*
+ * If My_term is set, or can't find a terminal in the environment,
+ * use Def_term.
+ */
+ if (My_term || (sp = getenv("TERM")) == NULL)
+ sp = Def_term;
+ if (setterm(sp) == ERR)
+ return (NULL);
+
+ /* Need either homing or cursor motion for refreshes */
+ if (!HO && !CM)
+ return (NULL);
+
+ if (curscr != NULL)
+ delwin(curscr);
+ if ((curscr = newwin(LINES, COLS, 0, 0)) == ERR)
+ return (NULL);
+ clearok(curscr, 1);
+
+ if (stdscr != NULL)
+ delwin(stdscr);
+ if ((stdscr = newwin(LINES, COLS, 0, 0)) == ERR) {
+ delwin(curscr);
+ return (NULL);
+ }
+
+ __set_stophandler();
+
+#ifdef DEBUG
+ __CTRACE("initscr: LINES = %d, COLS = %d\n", LINES, COLS);
+#endif
+ __startwin();
+
+ return (stdscr);
+}
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