The was a disturbance in the force today:
$ mkdir dir $ touch file $ chmod +s dir file $ ls -l drwsr-sr-x 2 root root 4096 Apr 30 11:54 dir -rwSr-Sr-- 1 root root 0 Apr 30 11:54 file $ chmod 0750 dir $ chmod 0640 file $ ls -l drwsr-s--- 2 root root 4096 Apr 30 11:54 dir -rw-r----- 1 root root 0 Apr 30 11:54 fileYes, this is even documented behaviour and conforms to POSIX as well - still, I find it far from being intuitive. There's a quite an interesting posting at the
> This topic came up when I first added that feature, and originally I > agreed with you, but others did not and their arguments were > persuasive. The counterargument is that it's strange if a leading > zero changes the semantics of a number, as this is not what many > people expect....mentioning an earlier discussion on the same list. Oh well...