Adding upstream version 3:4.8.30.upstream/3%4.8.30

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 110 insertions, 0 deletions

diff --git a/lib/tty/tty-internal.c b/lib/tty/tty-internal.c
new file mode 100644
index 0000000..c79301d
--- /dev/null
+++ b/lib/tty/tty-internal.c
@@ -0,0 +1,110 @@
+/*
+   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]);
+}
+
+/* --------------------------------------------------------------------------------------------- */