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24 lines
531 B
24 lines
531 B
#!/bin/bash
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# function launch {
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# exec 3>&1 1>&2 2>&3 ./useless.sh
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# exec 3>&1 1>&2 2>&3
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# }
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function on_exit {
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FAILURE=${1:-0}
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[[ $FAILURE -gt 0 ]] && >&2 echo EXIT "$FAILURE"
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trap - ERR TERM INT EXIT
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}
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export -f on_exit
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{
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myvar=$(bash -c "
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set -TEue -o pipefail;
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trap 'on_exit \$?' ERR TERM INT EXIT
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. ./useless.sh
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" 3>&1 1>&2 2>&3 | tee /dev/fd/4 | 3>&5 1>&2 2>&3 tee /dev/fd/5)
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} 5>&1 4>&2 # magic trick: fd4 grabs stderr, then show up again on stderr
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echo ----------
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echo -e "stderr is:\n$myvar"
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