sudo chown $USER.tty $TTY
# FIXME: fix for screen race-conditions
-PID_FILE_="/var/run/grml-screen"
+PID_FILE_="/var/lock/grml-screen"
+PID_FILE_CREATED_="false"
MY_PID_="$$"
if [ ! -d "/var/run/screen/S-$USER" ]; then
# no /var/run/screen/S-$USER and possible no /var/run/screen either -> locking
for i in `seq 40`; do # 40*0.25 = 10 seconds
if lockfile-create --retry 0 $PID_FILE_; then
echo $MY_PID_ >$PID_FILE_
+ PID_FILE_CREATED_="true"
break
+ else
+ PID_FILE_CREATED_="error"
fi
sleep 0.25
done
fi
-if [ -f $PID_FILE_ ]; then
+if [ $PID_FILE_CREATED_ = "true" ]; then
# FORK BEGIN
(
- for i in `seq 40`; do # 40*0.25 = 10 seconds
- if [ ! -d "/var/run/screen/S-$USER" ]; then
- sleep 0.25 # educated guess
- else
- break
+ for i in `seq 40`; do # 40*0.25 = 10 seconds
+ if [ ! -d "/var/run/screen/S-$USER" ]; then
+ sleep 0.25 # educated guess
+ else
+ break
+ fi
+ done
+ if [ `cat $PID_FILE_` = $MY_PID_ ]; then
+ rm $PID_FILE_
+ lockfile-remove $PID_FILE_
fi
- done
- if [ `cat $PID_FILE_` = $MY_PID_ ]; then
- rm $PID_FILE_
- lockfile-remove $PID_FILE_
- fi
)&
# FORK END
-else
+elif [ $PID_FILE_CREATED_ = "error" ]; then
SLEEP_TIME_="$(( $$ % 5 * 5 + 5 ))"
- echo "grml-screen: Error could not create lockfile! (sleeping for $SLEEP_TIME_)"
+ echo "grml-screen: Error could not create lockfile! (sleeping for $SLEEP_TIME_)" >&2
sleep $SLEEP_TIME_
+elif [ $PID_FILE_CREATED_ = "false" ]; then
+ echo "nothing to do" &>/dev/null
+else
+ echo "grml-screen: internal error - PID_FILE_CREATED_ == \"$PID_FILE_CREATED_\"" >&2
fi
# now run screen with config