Assorted OpenVMS utility procedures.

Routines for moving around easily.  These ALL keep track of the last
directory visited, storing it in the logical LASTDIR.

CD.COM                    "cd subdir"  (=set def [.subdir])
DOWN.COM                  "down"       (pick from list of subdirectories)
HOME.COM                  "home"       (return to sys$login)
LAST_DIR.COM              "last"       (return to last directory)
SET_DEF_DIR.COM           "setdef disk:[dir]"
                                       (like set def)
TO_DIR.COM                "to dir"     (like set def, but no [] needed)
UP.COM                    "up 3"       (like set def [-.-.-])
of last

Miscellaneous routines

CHANGEALL.COM             Makes global substitutions across text files 
                          (has serious limitations - it cannot deal with "/"
                          in substitutions!)
DEFINE_UNIX.COM           Put posix commands into DCL symbols
FAKE_UNIX.COM             Define a large subset of Unix commands, requires POSIX
FIELDEXTRACTOR.COM        Extract line/position/width fields and write to a file
FIX_UNIXNAME.COM          Fixes horrific Unix names, can also do very 
                          complex name substitutions and rearrangements.
FULL_FAKE_UNIX.COM        Like FAKE_UNIX, but defines more commands
PAGEIT.COM                Breaks a text file into fixed length pages and 
                          puts a header line on top.