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rm -f test.fifo
mkfifo test.fifo
(sleep 1; kill -chld $$) &
(sleep 2; echo Hello >test.fifo) &
# We get open("test.fifo") interrupted by SIGCHLD from the first subshell.
# The shell MUST retry the open (no printing of error messages).
# Then, the second subshell opens fifo for writing and open unblocks and succeeds.
cat <test.fifo
echo "Done:$?"
rm -f test.fifo
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