1 files changed, 35 insertions, 0 deletions
diff --git a/src/time.c b/src/time.c
new file mode 100644
index 0000000..5338cb9
--- /dev/null
+++ b/src/time.c
@@ -0,0 +1,35 @@
+#include <stdio.h>
+#include <stddef.h>
+#include <sys/time.h>
+
+#include "error.h"
+
+double timestamp(void) {
+	struct timeval  tv;
+
+	if (gettimeofday(&tv, NULL) == -1) {
+		return -1;
+	}
+
+	return tv.tv_sec + (tv.tv_usec * 1e-6);
+}
+
+unsigned long get_boot_time(void) {
+	FILE *fp = fopen("/proc/stat", "r");
+	if (!fp) {
+		error("fopen /proc/stat: %s", strerror(errno));
+		return 0;
+	}
+
+	char           buf[256];
+	unsigned long  btime = 0;
+
+	while (fgets(buf, sizeof(buf), fp)) {
+		if (sscanf(buf, "btime %lu", &btime) == 1) {
+			break;
+		}
+	}
+
+	fclose(fp);
+	return btime;
+}