[PATCH]: Fix tui for background pb

[Stephane Carrez <Stephane dot Carrez at worldnet dot fr>]

Hi!

When the gdb-tui is put in background and it is restored, the
screen is not updated and the terminal is not restored.
I've committed this patch that catches SIGCONT to restore the
terminal and refresh the screen.  The terminal settings is saved
restored using the curses savetty/resetty functions.

	Stephane

2001-07-22  Stephane Carrez  <Stephane.Carrez@worldnet.fr>

	* tuiIO.c (tui_initialize_io): Install tui_cont_sig signal handler
	if SIGCONT is defined.
	(tui_cont_sig): New function when SIGCONT is defined.
	(tui_setup_io): Save tty setting to restore by SIGCONT.
Index: tuiIO.c
===================================================================
RCS file: /cvs/src/src/gdb/tui/tuiIO.c,v
retrieving revision 1.8
diff -u -p -r1.8 tuiIO.c
--- tuiIO.c	2001/07/21 19:56:54	1.8
+++ tuiIO.c	2001/07/21 22:34:08
@@ -37,6 +37,7 @@
 #include "ui-out.h"
 #include "cli-out.h"
 #include <fcntl.h>
+#include <signal.h>
 
 /* This file controls the IO interactions between gdb and curses.
    When the TUI is enabled, gdb has two modes a curses and a standard
@@ -267,6 +268,9 @@ tui_setup_io (int mode)
       gdb_stdlog = gdb_stdout;	/* for moment */
       gdb_stdtarg = gdb_stderr;	/* for moment */
       uiout = tui_out;
+
+      /* Save tty for SIGCONT.  */
+      savetty ();
     }
   else
     {
@@ -284,13 +288,38 @@ tui_setup_io (int mode)
       rl_getc_function = tui_old_rl_getc_function;
       rl_outstream = tui_old_rl_outstream;
       readline_echoing_p = tui_old_readline_echoing_p;
+
+      /* Save tty for SIGCONT.  */
+      savetty ();
+    }
+}
+
+#ifdef SIGCONT
+/* Catch SIGCONT to restore the terminal and refresh the screen.  */
+static void
+tui_cont_sig (int sig)
+{
+  if (tui_active)
+    {
+      /* Restore the terminal setting because another process (shell)
+         might have changed it.  */
+      resetty ();
+
+      /* Force a refresh of the screen.  */
+      tuiRefreshAll ();
     }
+  signal (sig, tui_cont_sig);
 }
+#endif
 
 /* Initialize the IO for gdb in curses mode.  */
 void
 tui_initialize_io ()
 {
+#ifdef SIGCONT
+  signal (SIGCONT, tui_cont_sig);
+#endif
+
   /* Create tui output streams.  */
   tui_stdout = tui_fileopen (stdout);
   tui_stderr = tui_fileopen (stderr);