ref: 6f15a730f351b75f24286cb937a96db1ee9e5b82
dir: /sys/src/libc/port/reduce/
O=$1 shift objtype=$1 shift ls -p ../$objtype/*.[cs] >[2]/dev/null | sed 's/..$//;s/^/^/' > /tmp/reduce.$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