1 files changed, 17 insertions, 0 deletions
diff --git a/macosx/uptime.c b/macosx/uptime.c
new file mode 100644
index 00000000..7146fb52
--- /dev/null
+++ b/macosx/uptime.c
@@ -0,0 +1,17 @@
+#include <time.h>
+#include <errno.h>
+#include <sys/sysctl.h>
+
+long uptime(void)
+{
+    struct timeval boottime;
+    size_t len = sizeof(boottime);
+    int mib[2] = { CTL_KERN, KERN_BOOTTIME };
+    if (sysctl(mib, 2, &boottime, &len, NULL, 0) < 0)
+    {
+        return -1L;
+    }
+    time_t bsec = boottime.tv_sec, csec = time(NULL);
+
+    return (long) difftime(csec, bsec);
+}