complete -c chgrp -s c -l changes -d 'report only when a change is made'
complete -c chgrp -s v -l verbose -d 'output a diagnostic for every file processed'
complete -c chgrp -s R -l recursive -d 'operate on files and directories recursively'
complete -c chgrp -s H -d 'if a command line argument is a symbolic link to a directory, traverse it'
complete -c chgrp -s L -d 'traverse every symbolic link encountered in a directory'
complete -c chgrp -s P -d 'do not traverse any symbolic links (default)'
complete -c chgrp -s s -l same-filesystem -d 'do not cross filesystem boundaries (requires recursive)'
complete -c chgrp -s h -l help -d 'Print help'
complete -c chgrp -s V -l version -d 'Print version'