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Kernel and Embedded Linux
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# $FreeBSD$ T=`mktemp -d ${TMPDIR:-/tmp}/sh-test.XXXXXX` trap 'rm -rf $T' 0 cd $T || exit 3 mkfifo fifo1 trapped= trap trapped=1 QUIT { kill -QUIT $$; sleep 1; exit 4; } >fifo1 & wait <fifo1 r=$? [ "$r" -gt 128 ] && [ -n "$trapped" ]