chgrp and chown should support -L, -H, -P per POSIX/SUSv3

[Tobias Burnus]

Hi,

chown (coreutils) 5.0.90
chgrp (coreutils) 5.0.90

don't support the -L, -H and -P options which are required by SUSv3.
(By the way, those options  _are_ supported by "cp".)

Please implement them.

Best regards,

Tobias


-H
    If the -R option is specified and a symbolic link referencing a file
of type directory is specified on the command line, chgrp shall change
the group of the directory referenced by the symbolic link and all files
in the file hierarchy below it.

-L
    If the -R option is specified and a symbolic link referencing a file
of type directory is specified on the command line or encountered during
the traversal of a file hierarchy, chgrp shall change the group of the
directory referenced by the symbolic link and all files in the file
hierarchy below it.

-P
    If the -R option is specified and a symbolic link is specified on
the command line or encountered during the traversal of a file
hierarchy, chgrp shall change the group ID of the symbolic link if the
system supports this operation. The chgrp utility shall not follow the
symbolic link to any other part of the file hierarchy.