# $FreeBSD: releng/12.1/bin/sh/tests/builtins/trap4.0 217035 2011-01-05 23:17:29Z jilles $ T=$(mktemp -d ${TMPDIR:-/tmp}/sh-test.XXXXXX) trap 'rm -rf $T' 0 cd $T || exit 3 mkfifo fifo1 v=$( exec 3>&1 : &3 2>/dev/null' PIPE echo x 2>/dev/null } >fifo1 ) test "$v" = trapped