1 files changed, 25 insertions, 0 deletions
diff --git a/usr/klibc/alarm.c b/usr/klibc/alarm.c
new file mode 100644
index 0000000..8bd74c5
--- /dev/null
+++ b/usr/klibc/alarm.c
@@ -0,0 +1,25 @@
+/*
+ * alarm.c
+ */
+
+#include <sys/time.h>
+#include <sys/syscall.h>
+
+#ifndef __NR_alarm
+
+/* Emulate alarm() via setitimer() */
+
+unsigned int alarm(unsigned int seconds)
+{
+	struct itimerval iv;
+
+	iv.it_interval.tv_sec = iv.it_interval.tv_usec = 0;
+	iv.it_value.tv_sec = seconds;
+	iv.it_value.tv_usec = 0;
+
+	setitimer(ITIMER_REAL, &iv, &iv);
+
+	return iv.it_value.tv_sec + (iv.it_value.tv_usec ? 1 : 0);
+}
+
+#endif