added release_results (formerly in par_list.ML);
more informative trace_active;
join_results: avoid deadlock via nested SYNCHRONOIZED, more robust active join, less rechecking of tasks;
#!/usr/bin/env bash
#
# $Id$
#
# fileident --- produce file identification based
FILE="$1"
if [ -n "$ISABELLE_FILE_IDENT" -a -f "$FILE" -a -r "$FILE" ]
then
ID=$(cat "$FILE" | $ISABELLE_FILE_IDENT | cut -d " " -f 1) && echo -n "$ID"
fi