cli: introduce signal handler

Provide a mechanism to add a signal handler for Unix or Win32.

1 files changed, 37 insertions, 0 deletions

diff --git a/src/cli/win32/sighandler.c b/src/cli/win32/sighandler.c
new file mode 100644
index 000000000..cc0b64640
--- /dev/null
+++ b/src/cli/win32/sighandler.c
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "git2_util.h"
+#include <windows.h>
+
+#include "cli.h"
+
+static void (*interrupt_handler)(void) = NULL;
+
+static BOOL WINAPI interrupt_proxy(DWORD signal)
+{
+	GIT_UNUSED(signal);
+	interrupt_handler();
+	return TRUE;
+}
+
+int cli_sighandler_set_interrupt(void (*handler)(void))
+{
+	BOOL result;
+
+	if ((interrupt_handler = handler) != NULL)
+		result = SetConsoleCtrlHandler(interrupt_proxy, FALSE);
+	else
+		result = SetConsoleCtrlHandler(NULL, FALSE);
+
+	if (!result) {
+		git_error_set(GIT_ERROR_OS, "could not set control control handler");
+		return -1;
+	}
+
+	return 0;
+}