implement lockfile handling

[etc/offlineimap.git] / .bin / offlineimap

diff --git a/.bin/offlineimap b/.bin/offlineimap
index c9f8b2a0ae9b6dd39317bb883dc37c058364edc4..5bf7e521b0308c3f4475cb391292c50b1e6f9b27 100755 (executable)
--- a/.bin/offlineimap
+++ b/.bin/offlineimap
@@ -1,10 +1,18 @@
 #!/bin/sh
 set -eu
 
+VAR=$HOME/.var/offlineimap
+LOCKFILE="$VAR/.cron.lock"
+trap "rm -f $LOCKFILE" 0 1 2 3 4 5 6 7 8 10 11 12 13 14 15
+if ! lockfile -0 -r0 -l 3600 "$LOCKFILE" 2>/dev/null; then
+  echo "E: offlineimap is already running." >&2
+  exit 1
+fi
+
 if ! test -t 0; then
   echo Renicing because we are not run interactively… >&2
   renice 20 -p $$ >/dev/null
-  ionice -c2 -n7 -p $$
+  ionice -c3 -p $$
 fi
 
 ret=0