The unix_vms_fixedup.src is a little program that "emulates"
unix. It does this by generating approximately this output for
every command. (It does NOT generate huge "core" files to fill
your disk, though...)

$pwd:==$dkb0:[everhart.xfr]exec pwd
$pwd
Core dumped
%SYSTEM-F-OPCDEC, opcode reserved to DIGITAL fault at PC=0000027C, PSL=03C00000
%TRACE-F-TRACEBACK, symbolic stack dump follows
module name     routine name                     line       rel PC    abs PC

.MAIN.          EXEC                                       0000003C  0000027C