1 files changed, 54 insertions, 0 deletions
diff --git a/src/proc_uptime.c b/src/proc_uptime.c
new file mode 100644
index 00000000..9f341a33
--- /dev/null
+++ b/src/proc_uptime.c
@@ -0,0 +1,54 @@
+#include "common.h"
+
+int do_proc_uptime(int update_every, usec_t dt) {
+    (void)dt;
+
+    static RRDSET *st = NULL;
+    collected_number uptime = 0;
+
+#ifdef CLOCK_BOOTTIME_IS_AVAILABLE
+    uptime = now_boottime_usec() / 1000;
+#else
+    static procfile *ff = NULL;
+
+    if(unlikely(!ff)) {
+        char filename[FILENAME_MAX + 1];
+        snprintfz(filename, FILENAME_MAX, "%s%s", global_host_prefix, "/proc/uptime");
+
+        ff = procfile_open(config_get("plugin:proc:/proc/uptime", "filename to monitor", filename), " \t", PROCFILE_FLAG_DEFAULT);
+        if(unlikely(!ff))
+            return 1;
+    }
+
+    ff = procfile_readall(ff);
+    if(unlikely(!ff))
+        return 0; // we return 0, so that we will retry to open it next time
+
+    if(unlikely(procfile_lines(ff) < 1)) {
+        error("/proc/uptime has no lines.");
+        return 1;
+    }
+    if(unlikely(procfile_linewords(ff, 0) < 1)) {
+        error("/proc/uptime has less than 1 word in it.");
+        return 1;
+    }
+
+    uptime = (collected_number)(strtold(procfile_lineword(ff, 0, 0), NULL) * 1000.0);
+#endif
+
+    // --------------------------------------------------------------------
+
+    if(unlikely(!st))
+        st = rrdset_find("system.uptime");
+
+    if(unlikely(!st)) {
+        st = rrdset_create("system", "uptime", NULL, "uptime", NULL, "System Uptime", "seconds", 1000, update_every, RRDSET_TYPE_LINE);
+        rrddim_add(st, "uptime", NULL, 1, 1000, RRDDIM_ABSOLUTE);
+    }
+    else rrdset_next(st);
+
+    rrddim_set(st, "uptime", uptime);
+    rrdset_done(st);
+
+    return 0;
+}