1 /* $OpenBSD: lib_initscr.c,v 1.4 2023/10/17 09:52:08 nicm Exp $ */
2
3 /****************************************************************************
4 * Copyright 2019,2020 Thomas E. Dickey *
5 * Copyright 1998-2016,2017 Free Software Foundation, Inc. *
6 * *
7 * Permission is hereby granted, free of charge, to any person obtaining a *
8 * copy of this software and associated documentation files (the *
9 * "Software"), to deal in the Software without restriction, including *
10 * without limitation the rights to use, copy, modify, merge, publish, *
11 * distribute, distribute with modifications, sublicense, and/or sell *
12 * copies of the Software, and to permit persons to whom the Software is *
13 * furnished to do so, subject to the following conditions: *
14 * *
15 * The above copyright notice and this permission notice shall be included *
16 * in all copies or substantial portions of the Software. *
17 * *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
21 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
24 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
25 * *
26 * Except as contained in this notice, the name(s) of the above copyright *
27 * holders shall not be used in advertising or otherwise to promote the *
28 * sale, use or other dealings in this Software without prior written *
29 * authorization. *
30 ****************************************************************************/
31
32 /****************************************************************************
33 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
34 * and: Eric S. Raymond <esr@snark.thyrsus.com> *
35 * and: Thomas E. Dickey 1996-on *
36 ****************************************************************************/
37
38 /*
39 ** lib_initscr.c
40 **
41 ** The routines initscr(), and termname().
42 **
43 */
44
45 #include <curses.priv.h>
46
47 #if HAVE_SYS_TERMIO_H
48 #include <sys/termio.h> /* needed for ISC */
49 #endif
50
51 MODULE_ID("$Id: lib_initscr.c,v 1.4 2023/10/17 09:52:08 nicm Exp $")
52
NCURSES_EXPORT(WINDOW *)53 NCURSES_EXPORT(WINDOW *)
54 initscr(void)
55 {
56 WINDOW *result;
57
58 START_TRACE();
59 T((T_CALLED("initscr()")));
60
61 _nc_init_pthreads();
62 _nc_lock_global(curses);
63
64 /* Portable applications must not call initscr() more than once */
65 if (!_nc_globals.init_screen) {
66 const char *env;
67 char *name;
68
69 _nc_globals.init_screen = TRUE;
70
71 env = getenv("TERM");
72 (void) VALID_TERM_ENV(env, "unknown");
73
74 if ((name = strdup(env)) == NULL) {
75 fprintf(stderr, "Error opening allocating $TERM.\n");
76 ExitProgram(EXIT_FAILURE);
77 }
78 #ifdef __CYGWIN__
79 /*
80 * 2002/9/21
81 * Work around a bug in Cygwin. Full-screen subprocesses run from
82 * bash, in turn spawned from another full-screen process, will dump
83 * core when attempting to write to stdout. Opening /dev/tty
84 * explicitly seems to fix the problem.
85 */
86 if (NC_ISATTY(fileno(stdout))) {
87 FILE *fp = fopen("/dev/tty", "w");
88 if (fp != 0 && NC_ISATTY(fileno(fp))) {
89 fclose(stdout);
90 dup2(fileno(fp), STDOUT_FILENO);
91 stdout = fdopen(STDOUT_FILENO, "w");
92 }
93 }
94 #endif
95 if (newterm(name, stdout, stdin) == 0) {
96 fprintf(stderr, "Error opening terminal: %s.\n", name);
97 ExitProgram(EXIT_FAILURE);
98 }
99
100 /* def_shell_mode - done in newterm/_nc_setupscreen */
101 #if NCURSES_SP_FUNCS
102 NCURSES_SP_NAME(def_prog_mode) (CURRENT_SCREEN);
103 #else
104 def_prog_mode();
105 #endif
106 free(name);
107 }
108 result = stdscr;
109 _nc_unlock_global(curses);
110
111 returnWin(result);
112 }
113