1 files changed, 63 insertions, 0 deletions
diff --git a/components/uptime.c b/components/uptime.c
new file mode 100644
index 0000000..debe4cb
--- /dev/null
+++ b/components/uptime.c
@@ -0,0 +1,63 @@
+/* See LICENSE file for copyright and license details. */
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+#if defined(__linux__)
+#include <sys/sysinfo.h>
+#elif defined(__OpenBSD__)
+#include <sys/sysctl.h>
+#include <sys/time.h>
+#endif
+
+#include "../util.h"
+
+#if defined(__linux__)
+const char *
+uptime(void)
+{
+	int h;
+	int m;
+	int uptime = 0;
+	struct sysinfo info;
+
+	sysinfo(&info);
+	uptime = info.uptime;
+
+	h = uptime / 3600;
+	m = (uptime - h * 3600) / 60;
+
+	return bprintf("%dh %dm", h, m);
+}
+#elif defined(__OpenBSD__)
+const char *
+uptime(void)
+{
+	int h;
+	int m;
+	int uptime = 0;
+
+	int mib[2];
+	size_t size;
+	time_t now;
+	struct timeval boottime;
+
+	time(&now);
+
+	mib[0] = CTL_KERN;
+	mib[1] = KERN_BOOTTIME;
+
+	size = sizeof(boottime);
+
+	if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1)
+		uptime = now - boottime.tv_sec;
+	else {
+		fprintf(stderr, "sysctl 'KERN_BOOTTIME': %s\n", strerror(errno));
+		return NULL;
+	}
+
+	h = uptime / 3600;
+	m = (uptime - h * 3600) / 60;
+
+	return bprintf("%dh %dm", h, m);
+}
+#endif