release/src/router/libncurses/ncurses/base/lib_initscr.c

   1 /****************************************************************************
   2  * Copyright (c) 1998-2008,2009 Free Software Foundation, Inc.              *
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  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
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  28
  29 /****************************************************************************
  30  *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
  31  *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
  32  *     and: Thomas E. Dickey                        1996-2003               *
  33  ****************************************************************************/
  34
  35 /*
  36 **      lib_initscr.c
  37 **
  38 **      The routines initscr(), and termname().
  39 **
  40 */
  41
  42 #include <curses.priv.h>
  43
  44 #if HAVE_SYS_TERMIO_H
  45 #include <sys/termio.h>         /* needed for ISC */
  46 #endif
  47
  48 MODULE_ID("$Id: lib_initscr.c,v 1.39 2009/02/14 20:55:49 tom Exp $")
  49
  50 NCURSES_EXPORT(WINDOW *)
  51 initscr(void)
  52 {
  53     WINDOW *result;
  54
  55     NCURSES_CONST char *name;
  56
  57     START_TRACE();
  58     T((T_CALLED("initscr()")));
  59
  60     _nc_init_pthreads();
  61     _nc_lock_global(curses);
  62
  63     /* Portable applications must not call initscr() more than once */
  64     if (!_nc_globals.init_screen) {
  65         _nc_globals.init_screen = TRUE;
  66
  67         if ((name = getenv("TERM")) == 0
  68             || *name == '\0')
  69             name = "unknown";
  70 #ifdef __CYGWIN__
  71         /*
  72          * 2002/9/21
  73          * Work around a bug in Cygwin.  Full-screen subprocesses run from
  74          * bash, in turn spawned from another full-screen process, will dump
  75          * core when attempting to write to stdout.  Opening /dev/tty
  76          * explicitly seems to fix the problem.
  77          */
  78         if (isatty(fileno(stdout))) {
  79             FILE *fp = fopen("/dev/tty", "w");
  80             if (fp != 0 && isatty(fileno(fp))) {
  81                 fclose(stdout);
  82                 dup2(fileno(fp), STDOUT_FILENO);
  83                 stdout = fdopen(STDOUT_FILENO, "w");
  84             }
  85         }
  86 #endif
  87         if (newterm(name, stdout, stdin) == 0) {
  88             fprintf(stderr, "Error opening terminal: %s.\n", name);
  89             exit(EXIT_FAILURE);
  90         }
  91
  92         /* def_shell_mode - done in newterm/_nc_setupscreen */
  93 #if NCURSES_SP_FUNCS
  94         NCURSES_SP_NAME(def_prog_mode) (CURRENT_SCREEN);
  95 #else
  96         def_prog_mode();
  97 #endif
  98     }
  99     result = stdscr;
 100     _nc_unlock_global(curses);
 101
 102     returnWin(result);
 103 }