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tetex-bin  3.0
lib_initscr.c
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00001 /****************************************************************************
00002  * Copyright (c) 1998-2002,2003 Free Software Foundation, Inc.              *
00003  *                                                                          *
00004  * Permission is hereby granted, free of charge, to any person obtaining a  *
00005  * copy of this software and associated documentation files (the            *
00006  * "Software"), to deal in the Software without restriction, including      *
00007  * without limitation the rights to use, copy, modify, merge, publish,      *
00008  * distribute, distribute with modifications, sublicense, and/or sell       *
00009  * copies of the Software, and to permit persons to whom the Software is    *
00010  * furnished to do so, subject to the following conditions:                 *
00011  *                                                                          *
00012  * The above copyright notice and this permission notice shall be included  *
00013  * in all copies or substantial portions of the Software.                   *
00014  *                                                                          *
00015  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
00016  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
00017  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
00018  * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
00019  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
00020  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
00021  * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
00022  *                                                                          *
00023  * Except as contained in this notice, the name(s) of the above copyright   *
00024  * holders shall not be used in advertising or otherwise to promote the     *
00025  * sale, use or other dealings in this Software without prior written       *
00026  * authorization.                                                           *
00027  ****************************************************************************/
00028 
00029 /****************************************************************************
00030  *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
00031  *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
00032  *     and: Thomas E. Dickey                        1996-2003               *
00033  ****************************************************************************/
00034 
00035 /*
00036 **     lib_initscr.c
00037 **
00038 **     The routines initscr(), and termname().
00039 **
00040 */
00041 
00042 #include <curses.priv.h>
00043 
00044 #if HAVE_SYS_TERMIO_H
00045 #include <sys/termio.h>            /* needed for ISC */
00046 #endif
00047 
00048 MODULE_ID("$Id: lib_initscr.c,v 1.33 2003/12/27 19:13:51 tom Exp $")
00049 
00050 NCURSES_EXPORT(WINDOW *)
00051 initscr(void)
00052 {
00053     static bool initialized = FALSE;
00054     NCURSES_CONST char *name;
00055     int value;
00056 
00057     START_TRACE();
00058     T((T_CALLED("initscr()")));
00059     /* Portable applications must not call initscr() more than once */
00060     if (!initialized) {
00061        initialized = TRUE;
00062 
00063        if ((name = getenv("TERM")) == 0
00064            || *name == '\0')
00065            name = "unknown";
00066 #ifdef __CYGWIN__
00067        /*
00068         * 2002/9/21
00069         * Work around a bug in Cygwin.  Full-screen subprocesses run from
00070         * bash, in turn spawned from another full-screen process, will dump
00071         * core when attempting to write to stdout.  Opening /dev/tty
00072         * explicitly seems to fix the problem.
00073         */
00074        if (isatty(fileno(stdout))) {
00075            FILE *fp = fopen("/dev/tty", "w");
00076            if (fp != 0 && isatty(fileno(fp))) {
00077               fclose(stdout);
00078               dup2(fileno(fp), STDOUT_FILENO);
00079               stdout = fdopen(STDOUT_FILENO, "w");
00080            }
00081        }
00082 #endif
00083        if (newterm(name, stdout, stdin) == 0) {
00084            fprintf(stderr, "Error opening terminal: %s.\n", name);
00085            exit(EXIT_FAILURE);
00086        }
00087 
00088        /* allow user to set maximum escape delay from the environment */
00089        if ((value = _nc_getenv_num("ESCDELAY")) >= 0) {
00090            ESCDELAY = value;
00091        }
00092 
00093        /* def_shell_mode - done in newterm/_nc_setupscreen */
00094        def_prog_mode();
00095     }
00096     returnWin(stdscr);
00097 }