Specify SA_RESTART when registering the SIGWINCH signal handler

SA_RESTART allows system calls to be restarted across a signal handler.
By specifying this flag we fix the issue where if the user is being
prompted to answer yes or no, and the terminal gets resized in the
meantime, the prompt will think that the user sent an EOF and so it will
take the default action for that prompt (in the case of the quit prompt,
it will quit GDB).

gdb/ChangeLog:

	* tui/tui-win.c (tui_initialize_win): Specify SA_RESTART when
	registering the signal handler.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 326a0d6..45435fc 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,10 @@
 2014-11-23  Patrick Palka  <patrick@parcs.ath.cx>
 
+       * tui/tui-win.c (tui_initialize_win): Specify SA_RESTART when
+       registering the signal handler.
+
+2014-11-23  Patrick Palka  <patrick@parcs.ath.cx>
+
        * event-top.h (call_stdin_event_handler_again_p): Declare.
        * event-top.c (call_stdin_event_handler_again_p): Define.
        (stdin_event_handler): Use it.

diff --git a/gdb/tui/tui-win.c b/gdb/tui/tui-win.c
index d17a1e4..4488da8 100644 (file)
--- a/gdb/tui/tui-win.c
+++ b/gdb/tui/tui-win.c
@@ -834,6 +834,9 @@ tui_initialize_win (void)
 
   memset (&old_winch, 0, sizeof (old_winch));
   old_winch.sa_handler = &tui_sigwinch_handler;
+#ifdef SA_RESTART
+  old_winch.sa_flags = SA_RESTART;
+#endif
   sigaction (SIGWINCH, &old_winch, NULL);
 #else
   signal (SIGWINCH, &tui_sigwinch_handler);