Format:

& setprotect (files) -switch -switch... file1 file2 ...

Switches are either "pub" or "prv" optionally  followed  by  "=",
"+", or "-" and some combination of the characters "rwx"; The "="
argument sets the protection to the specified options, "+" adds a
field, and "-" removes a field.

The letters "rwx" stand for read, write, and execute  respective-
ly.  "pub"  stands  for the protection which users other than the
owner will have, while "prv" stands for the protection imposed on
the owner.

No switch argument will set the file(s) to prv=rwx;  pub=.   -pub
alone  will  set  the  file(s) to prv=rwx; pub=rx.  -prv alone is
equivalent to the no argument default.
