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 1.48 2020/09/07 14:26:48 tom Exp $")
50
NCURSES_EXPORT(WINDOW *)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 env = getenv("TERM");
70 (void) VALID_TERM_ENV(env, "unknown");
71
72 if ((name = strdup(env)) == NULL) {
73 fprintf(stderr, "Error opening allocating $TERM.\n");
74 ExitProgram(EXIT_FAILURE);
75 }
76 #ifdef __CYGWIN__
77 /*
78 * 2002/9/21
79 * Work around a bug in Cygwin. Full-screen subprocesses run from
80 * bash, in turn spawned from another full-screen process, will dump
81 * core when attempting to write to stdout. Opening /dev/tty
82 * explicitly seems to fix the problem.
83 */
84 if (NC_ISATTY(fileno(stdout))) {
85 FILE *fp = fopen("/dev/tty", "w");
86 if (fp != 0 && NC_ISATTY(fileno(fp))) {
87 fclose(stdout);
88 dup2(fileno(fp), STDOUT_FILENO);
89 stdout = fdopen(STDOUT_FILENO, "w");
90 }
91 }
92 #endif
93 if (newterm(name, stdout, stdin) == 0) {
94 fprintf(stderr, "Error opening terminal: %s.\n", name);
95 ExitProgram(EXIT_FAILURE);
96 }
97
98 /* def_shell_mode - done in newterm/_nc_setupscreen */
99 #if NCURSES_SP_FUNCS
100 NCURSES_SP_NAME(def_prog_mode) (CURRENT_SCREEN);
101 #else
102 def_prog_mode();
103 #endif
104 free(name);
105 }
106 result = stdscr;
107 _nc_unlock_global(curses);
108
109 returnWin(result);
110 }
111