Add handle_user_signal_hook

* src/keyboard.h (handle_user_signal_hook): New declaration.
* src/keyboard.c (handle_user_signal_hook): New variable.
(handle_user_signal): Call it.

1 files changed, 5 insertions, 0 deletions

diff --git a/src/keyboard.c b/src/keyboard.c
index 9ebd86b5356..b0fe328dbd6 100644
--- a/src/keyboard.c
+++ b/src/keyboard.c
@@ -7124,6 +7124,9 @@ struct user_signal_info
 /* List of user signals.  */
 static struct user_signal_info *user_signals = NULL;
 
+/* Function called when handling user signals.  */
+void (*handle_user_signal_hook) (int);
+
 void
 add_user_signal (int sig, const char *name)
 {
@@ -7172,6 +7175,8 @@ handle_user_signal (int sig)
           }
 
         p->npending++;
+        if (handle_user_signal_hook)
+          (*handle_user_signal_hook) (sig);
 #ifdef USABLE_SIGIO
         if (interrupt_input)
           handle_input_available_signal (sig);