Someone

$ sh -fxv `which wmii9rc` > wmii9rc.log
#!/bin/sh -f
RC=""
+ RC=
for i in "$PLAN9" /usr/local/plan9 /usr/local/9 /opt/plan9 /opt/9 /usr/plan9 /usr/9; do
        if [ -d "$i" -a -x "$i/bin/rc" ]; then
                RC="$i/bin/rc"
                break;
        fi
done
+ [ -d /usr/lib/9base -a -x /usr/lib/9base/bin/rc ]
+ RC=/usr/lib/9base/bin/rc
+ break

if [ ! -n "$RC" ]; then
        exit 1
elif [ "X$@" != "X" ]; then
        $RC $@
fi
+ [ ! -n /usr/lib/9base/bin/rc ]
+ [ X != X ]