File: set-x1.sub

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: ${TMPDIR:=/var/tmp}
TRACEFILE=$TMPDIR/bash-trace-$$
trap 'rm -f $TRACEFILE' 0 1 2 3 6 15

exec 4>$TRACEFILE
BASH_XTRACEFD=4

set -x

echo 1
echo 2
echo 3
echo 4

unset BASH_XTRACEFD

for f in a b c d e; do echo $f ; done

set +x

echo TRACEFILE:
cat $TRACEFILE
echo =====

exit 0