1 files changed, 13 insertions, 0 deletions
diff --git a/libc-top-half/musl/src/unistd/ualarm.c b/libc-top-half/musl/src/unistd/ualarm.c
new file mode 100644
index 0000000..2985855
--- /dev/null
+++ b/libc-top-half/musl/src/unistd/ualarm.c
@@ -0,0 +1,13 @@
+#define _GNU_SOURCE
+#include <unistd.h>
+#include <sys/time.h>
+
+unsigned ualarm(unsigned value, unsigned interval)
+{
+	struct itimerval it = {
+		.it_interval.tv_usec = interval,
+		.it_value.tv_usec = value
+	}, it_old;
+	setitimer(ITIMER_REAL, &it, &it_old);
+	return it_old.it_value.tv_sec*1000000 + it_old.it_value.tv_usec;
+}