chmod broken?

[Bill Rees]

Markku Kolkka wrote:
> Bill Rees kirjoitti viestissään (lähetysaika torstai, 30. 
> kesäkuuta 2005 08:26):
>   
>> Whoever
>> owns the file can chmod the file but if you're just a member
>> of the group you get the permission denied messages.
>>     
>
> This is exactly how chmod is supposed to work according to the 
> Single Unix Specification:
> "Only a process whose effective user ID matches the user ID of 
> the file, or a process with the appropriate privileges, shall be 
> permitted to change the file mode bits of a file."
> http://www.opengroup.org/onlinepubs/009695399/utilities/chmod.html
>
>   
Then what's the point of groups?

bill
p.s. sorry to waste your time on this.