X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Fbootchart%2Fstore.c;h=cedcba88ed1b8059c03281c75cd2a8fc1c52f992;hb=c358d728e7d6bf38a0176a9d5d013c6e972cddbf;hp=e0719838d5089a6e369ae546715335fc4b4c91c2;hpb=799a8f39d8eb9ea725e85a598c0f5dbd658c8ba7;p=elogind.git

diff --git a/src/bootchart/store.c b/src/bootchart/store.c
index e0719838d..cedcba88e 100644
--- a/src/bootchart/store.c
+++ b/src/bootchart/store.c
@@ -57,27 +57,22 @@ double gettime_ns(void) {
         return (n.tv_sec + (n.tv_nsec / 1000000000.0));
 }
 
-void log_uptime(void) {
-        _cleanup_fclose_ FILE *f = NULL;
-        char str[32];
-        double uptime;
-
-        f = fopen("/proc/uptime", "re");
-
-        if (!f)
-                return;
-        if (!fscanf(f, "%s %*s", str))
-                return;
-
-        uptime = strtod(str, NULL);
+static double gettime_up(void) {
+        struct timespec n;
 
-        log_start = gettime_ns();
+        clock_gettime(CLOCK_BOOTTIME, &n);
+        return (n.tv_sec + (n.tv_nsec / 1000000000.0));
+}
 
-        /* start graph at kernel boot time */
+void log_uptime(void) {
         if (arg_relative)
-                graph_start = log_start;
-        else
+                graph_start = log_start = gettime_ns();
+        else {
+                double uptime = gettime_up();
+
+                log_start = gettime_ns();
                 graph_start = log_start - uptime;
+        }
 }
 
 static char *bufgetline(char *buf) {