ref: a141f4c53a32d8227f9a490a8e4f7d87445c47d1
dir: /sys/src/libsec/port/reduce/
O=$1 shift objtype=$1 shift ls -p ../$objtype/*.[cs] >[2]/dev/null | sed 's/..$//' > /tmp/reduce.$pid # # if empty directory, just return the input files # if (! ~ $status '|') { echo $* rm /tmp/reduce.$pid exit 0 } echo $* | tr ' ' \012 | grep -v -f /tmp/reduce.$pid | tr \012 ' ' rm /tmp/reduce.$pid