1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
|
/*
Internal stuff of the terminal controlling library.
Copyright (C) 2019-2023
Free Software Foundation, Inc.
Written by:
Andrew Borodin <aborodin@vmail.ru>, 2019.
This file is part of the Midnight Commander.
The Midnight Commander is free software: you can redistribute it
and/or modify it under the terms of the GNU General Public License as
published by the Free Software Foundation, either version 3 of the License,
or (at your option) any later version.
The Midnight Commander is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/** \file
* \brief Source: internal stuff of the terminal controlling library.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include "lib/global.h"
#include <glib-unix.h>
#include "tty-internal.h"
/*** global variables ****************************************************************************/
/* pipe to handle SIGWINCH */
int sigwinch_pipe[2];
/*** file scope macro definitions ****************************************************************/
/*** global variables ****************************************************************************/
/*** file scope type declarations ****************************************************************/
/*** file scope variables ************************************************************************/
/* --------------------------------------------------------------------------------------------- */
/*** file scope functions ************************************************************************/
/* --------------------------------------------------------------------------------------------- */
/* --------------------------------------------------------------------------------------------- */
/*** public functions ****************************************************************************/
/* --------------------------------------------------------------------------------------------- */
void
tty_create_winch_pipe (void)
{
GError *mcerror = NULL;
if (!g_unix_open_pipe (sigwinch_pipe, FD_CLOEXEC, &mcerror))
{
fprintf (stderr, _("\nCannot create pipe for SIGWINCH: %s (%d)\n"),
mcerror->message, mcerror->code);
g_error_free (mcerror);
exit (EXIT_FAILURE);
}
/* If we read from an empty pipe, then read(2) will block until data is available.
* If we write to a full pipe, then write(2) blocks until sufficient data has been read
* from the pipe to allow the write to complete..
* Therefore, use nonblocking I/O.
*/
if (!g_unix_set_fd_nonblocking (sigwinch_pipe[0], TRUE, &mcerror))
{
fprintf (stderr, _("\nCannot configure write end of SIGWINCH pipe: %s (%d)\n"),
mcerror->message, mcerror->code);
g_error_free (mcerror);
tty_destroy_winch_pipe ();
exit (EXIT_FAILURE);
}
if (!g_unix_set_fd_nonblocking (sigwinch_pipe[1], TRUE, &mcerror))
{
fprintf (stderr, _("\nCannot configure read end of SIGWINCH pipe: %s (%d)\n"),
mcerror->message, mcerror->code);
g_error_free (mcerror);
tty_destroy_winch_pipe ();
exit (EXIT_FAILURE);
}
}
/* --------------------------------------------------------------------------------------------- */
void
tty_destroy_winch_pipe (void)
{
(void) close (sigwinch_pipe[0]);
(void) close (sigwinch_pipe[1]);
}
/* --------------------------------------------------------------------------------------------- */
|
