Plan 9 from Bell Labs’s /usr/web/sources/contrib/quanstro/root/amd64/bin/upas/msgcat
#!/bin/rc f=$* if(~ $#f 0) f=/mail/fs/mbox/[0-9]* f=`{echo $f|sed s:/mail/fs/mbox/::g} { for(i in $f) echo $i p } | upas/nedmail >[2=]