Fold in Beat Bolli's ntpoffset script.

2 files changed, 14 insertions, 0 deletions

diff --git a/contrib/README b/contrib/README
index 4ade2f1f..71dc8412 100644
--- a/contrib/README
+++ b/contrib/README
@@ -41,3 +41,7 @@ display the satellite view properly. webgps.py can be called with the argument
 "c" to run continously, with an integer duration and a unit suffix to run this
 long (units allowed are "s", "m", "h" and "d", e.g. "4h"), or without argument
 to create a snapshot of the current sat view.
+
+ntpoffset generate an estimate of your GPS's offset from a peerstats
+file.  For instructions on how to use this script, see the GPSD Time
+Service HOWTO in this distrubution.
diff --git a/contrib/ntpoffset b/contrib/ntpoffset
new file mode 100755
index 00000000..ef97c7ce
--- /dev/null
+++ b/contrib/ntpoffset
@@ -0,0 +1,10 @@
+#!/bin/sh
+#
+# Generate an estimate of your GPS's offset from a peerstats file
+# For instructions on how to use this script, see the GPSD Time 
+# Service HOWTO in this distrubution. 
+#
+awk '
+     /127\.127\.28\.0/ { sum += $5 * 1000; cnt++; }
+     END { print sum / cnt; }
+' </var/log/ntpstats/peerstats