On Fri, May 23, 2025, 17:17 Stephen Leaf <smil...@gmail.com> wrote: > > #!/bin/bash > TMPFILE=$(mktemp /tmp/tmp.XXXX) > for a in this is a test; do > if [ $a == 'a' ]; then > >&2 echo b > fi > done 2> >(echo "test!"> "$TMPFILE") >
The process substitution is asynchronous, so the write may not complete by the time the next command executes. Try adding "wait $!" here to wait for it to complete. > > #touch "$TMPFILE" > if [ -s "$TMPFILE" ]; then > echo temp file is not empty > else > echo temp file is empty > fi > echo "Contents of $TMPFILE" > cat $TMPFILE > rm $TMPFILE > > I get the output of: > temp file is empty > Contents of /tmp/tmp.LGvR > test! > > if I touch or cat the TMPFILE before the test, it behaves as expected. >
