allow <CTRL/C> to be typed; aborts last typed char

 * CTRL/C will be a command so it is important to be able to type it directly
 * aborting character processing is important because it allows aborting infinite loops
 * since the loop interruption currently relies on SIGINT handling, there is only limited
   support for XCurses and GTK - CTRL/C has to be typed in the terminal window.
   later support for input queue polling might be added

1 files changed, 19 insertions, 0 deletions

diff --git a/src/main.cpp b/src/main.cpp
index 2adb505..f5cd780 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -23,6 +23,7 @@
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
+#include <signal.h>
 
 #include <glib.h>
 #include <glib/gprintf.h>
@@ -51,6 +52,12 @@ namespace Flags {
 
 static gchar *mung_file = NULL;
 
+sig_atomic_t sigint_occurred = FALSE;
+
+extern "C" {
+static void sigint_handler(int signal);
+}
+
 void
 Interface::stdio_vmsg(MessageType type, const gchar *fmt, va_list ap)
 {
@@ -160,6 +167,8 @@ main(int argc, char **argv)
 	static GotoTable	cmdline_goto_table;
 	static QRegisterTable	local_qregs;
 
+	signal(SIGINT, sigint_handler);
+
 	process_options(argc, argv);
 
 	interface.ssm(SCI_SETCARETSTYLE, CARETSTYLE_BLOCK);
@@ -213,3 +222,13 @@ main(int argc, char **argv)
 
 	return 0;
 }
+
+/*
+ * Callbacks
+ */
+
+static void
+sigint_handler(int signal __attribute__((unused)))
+{
+	sigint_occurred = TRUE;
+}