util: add SIGINT handler

Add a helper for catching Ctrl-C from the user.

Signed-off-by: Daniel Wagner <[email protected]>

Author: igaw

util/meson.build

@@ -6,6 +6,7 @@ sources += [
   'util/crc32.c',
   'util/logging.c',
   'util/mem.c',
+  'util/sighdl.c',
   'util/suffix.c',
   'util/types.c',
   'util/utils.c'

util/sighdl.c

@@ -0,0 +1,27 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include <signal.h>
+#include <errno.h>
+
+#include "sighdl.h"
+
+bool nvme_sigint_received;
+
+static void nvme_sigint_handler(int signum)
+{
+	nvme_sigint_received = true;
+}
+
+int nvme_install_sigint_handler(void)
+{
+	struct sigaction act;
+
+	sigemptyset(&act.sa_mask);
+	act.sa_handler = nvme_sigint_handler;
+	act.sa_flags = 0;
+
+	nvme_sigint_received = false;
+	if (sigaction(SIGINT, &act, NULL) == -1)
+		return -errno;
+
+	return 0;
+}

util/sighdl.h

@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+#ifndef __NVME_SIGHDL
+#define __NVME_SIGHDL
+
+#include <stdbool.h>
+
+extern bool nvme_sigint_received;
+
+int nvme_install_sigint_handler(void);
+
+#endif // __NVME_SIGHDL