add some comments, adjust timestamp extension

1 files changed, 12 insertions, 1 deletions

diff --git a/logd/src/apps/retention/retention-enforcer.sh b/logd/src/apps/retention/retention-enforcer.sh
index ff743834b28..7ab1b27d71a 100755
--- a/logd/src/apps/retention/retention-enforcer.sh
+++ b/logd/src/apps/retention/retention-enforcer.sh
@@ -1,10 +1,19 @@
 #!/bin/sh
 
+# daemon that collects old log files.
+# global settings:
+
 DBGF=logs/vespa/debug.retention-enforcer
 DBDIR=var/db/vespa/logfiledb
 PIDF=$DBDIR/retention-enforcer.pid
 RETAIN_DAYS=31
 
+# this depends on components adding their log files
+# to a "database" in DBDIR named "logfiles.TTTTT" where
+# TTTTT is a timestamp in format (seconds/100000).
+# The "database" holds lines with format "timestamp /path/to/logfile"
+# where "timestamp" is just seconds since epoch.
+
 prereq_dir() {
 	if [ -d $1 ] && [ -w $1 ]; then
 		:
@@ -100,7 +109,7 @@ process_file() {
 		done
 	done < $dbfile
 	if [ $found = 0 ]; then
-		ts=${dbfile##*.}00000
+		ts=${dbfile##*.}99999
 		maybe_collect "$ts" "$dbfile"
 	fi
 }
@@ -121,6 +130,8 @@ mainloop() {
 	done
 }
 
+# MAIN:
+
 prepare_stuff
 mainloop
 exit 0