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Revert "Speed up 'read', fixing macOS hang"

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This reverts commit ff385e5a89.
It broke Solaris and illumos. More testing is needed.
This commit is contained in:
Martijn Dekker 2020-08-19 04:10:55 +01:00
parent ff385e5a89
commit 569c1bb9c1
4 changed files with 232 additions and 40 deletions
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14
src/cmd/ksh93/tests/io.sh
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@ -583,19 +583,5 @@ then exec 3>&-
err_exit "Open file descriptor leaks out of subshell"
fi
# ======
# On unpatched ksh on macOS, 'read' used to block when reading from a FIFO and there was no final newline.
if mkfifo "$tmp/fifo_no_lf"
then trap 'sleep_pid=0; kill "$ksh_pid"; err_exit "'\''read'\'' hangs on EOF without final linefeed when reading from FIFO"' TERM
(sleep 1; kill "$$") &
sleep_pid=$!
"$SHELL" -c 'print -n foo >$0 & while read f; do :; done <$0' "$tmp/fifo_no_lf" &
ksh_pid=$!
wait "$ksh_pid"
trap - TERM
((sleep_pid)) && kill "$sleep_pid"
else err_exit "mkfifo failed; cannot test reading from FIFO"
fi
# ======
exit $((Errors<125?Errors:125))