From 4abab5ad6c8465a7528ccdd5f49367da05f78bbd Mon Sep 17 00:00:00 2001
From: Vladimir Azarov <avm@intermediate-node.net>
Date: Tue, 1 Oct 2024 15:47:05 +0200
Subject: Initial version

---
 src/unistd/alarm.c | 10 ++++++++++
 1 file changed, 10 insertions(+)
 create mode 100644 src/unistd/alarm.c

(limited to 'src/unistd/alarm.c')

diff --git a/src/unistd/alarm.c b/src/unistd/alarm.c
new file mode 100644
index 0000000..a5e0c82
--- /dev/null
+++ b/src/unistd/alarm.c
@@ -0,0 +1,10 @@
+#include <unistd.h>
+#include <sys/time.h>
+#include "syscall.h"
+
+unsigned alarm(unsigned seconds)
+{
+	struct itimerval it = { .it_value.tv_sec = seconds }, old = { 0 };
+	setitimer(ITIMER_REAL, &it, &old);
+	return old.it_value.tv_sec + !!old.it_value.tv_usec;
+}
-- 
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