1 /**************************************************************************** 2 * Copyright 2019,2020 Thomas E. Dickey * 3 * Copyright 1998-2016,2017 Free Software Foundation, Inc. * 4 * * 5 * Permission is hereby granted, free of charge, to any person obtaining a * 6 * copy of this software and associated documentation files (the * 7 * "Software"), to deal in the Software without restriction, including * 8 * without limitation the rights to use, copy, modify, merge, publish, * 9 * distribute, distribute with modifications, sublicense, and/or sell * 10 * copies of the Software, and to permit persons to whom the Software is * 11 * furnished to do so, subject to the following conditions: * 12 * * 13 * The above copyright notice and this permission notice shall be included * 14 * in all copies or substantial portions of the Software. * 15 * * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 19 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 22 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 23 * * 24 * Except as contained in this notice, the name(s) of the above copyright * 25 * holders shall not be used in advertising or otherwise to promote the * 26 * sale, use or other dealings in this Software without prior written * 27 * authorization. * 28 ****************************************************************************/ 29 30 /**************************************************************************** 31 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 * 32 * and: Eric S. Raymond <esr@snark.thyrsus.com> * 33 * and: Thomas E. Dickey 1996-on * 34 ****************************************************************************/ 35 36 /* 37 ** lib_initscr.c 38 ** 39 ** The routines initscr(), and termname(). 40 ** 41 */ 42 43 #include <curses.priv.h> 44 45 #if HAVE_SYS_TERMIO_H 46 #include <sys/termio.h> /* needed for ISC */ 47 #endif 48 49 MODULE_ID("$Id: lib_initscr.c,v 1.45 2020/02/02 23:34:34 tom Exp $") 50 51 NCURSES_EXPORT(WINDOW *) 52 initscr(void) 53 { 54 WINDOW *result; 55 56 START_TRACE(); 57 T((T_CALLED("initscr()"))); 58 59 _nc_init_pthreads(); 60 _nc_lock_global(curses); 61 62 /* Portable applications must not call initscr() more than once */ 63 if (!_nc_globals.init_screen) { 64 const char *env; 65 char *name; 66 67 _nc_globals.init_screen = TRUE; 68 69 if ((env = getenv("TERM")) == 0 70 || *env == '\0') { 71 env = "unknown"; 72 } 73 if ((name = strdup(env)) == NULL) { 74 fprintf(stderr, "Error opening allocating $TERM.\n"); 75 ExitProgram(EXIT_FAILURE); 76 } 77 #ifdef __CYGWIN__ 78 /* 79 * 2002/9/21 80 * Work around a bug in Cygwin. Full-screen subprocesses run from 81 * bash, in turn spawned from another full-screen process, will dump 82 * core when attempting to write to stdout. Opening /dev/tty 83 * explicitly seems to fix the problem. 84 */ 85 if (NC_ISATTY(fileno(stdout))) { 86 FILE *fp = fopen("/dev/tty", "w"); 87 if (fp != 0 && NC_ISATTY(fileno(fp))) { 88 fclose(stdout); 89 dup2(fileno(fp), STDOUT_FILENO); 90 stdout = fdopen(STDOUT_FILENO, "w"); 91 } 92 } 93 #endif 94 if (newterm(name, stdout, stdin) == 0) { 95 fprintf(stderr, "Error opening terminal: %s.\n", name); 96 ExitProgram(EXIT_FAILURE); 97 } 98 99 /* def_shell_mode - done in newterm/_nc_setupscreen */ 100 #if NCURSES_SP_FUNCS 101 NCURSES_SP_NAME(def_prog_mode) (CURRENT_SCREEN); 102 #else 103 def_prog_mode(); 104 #endif 105 free(name); 106 } 107 result = stdscr; 108 _nc_unlock_global(curses); 109 110 returnWin(result); 111 } 112