Cygwin AF_UNIX emulation

Corinna Vinschen corinna-cygwin@cygwin.com
Mon Oct 20 10:44:00 GMT 2014


On Oct 18 17:05, Christian Franke wrote:
> Corinna Vinschen wrote:
> >   SE_CHANGE_NOTIFY_NAME
> >
> >     Required to receive notifications of changes to files or
> >     directories. This privilege also causes the system to skip all
> >     traversal access checks. It is enabled by default for all users.
> >
> >     User Right: Bypass traverse checking.
> 
> An unexpected "feature", IMO.
> 
> Hmm.... after removing this privilege, Cygwin returns garbage stat() info,
> for any path below the 'forbidden directory':
> 
> $ uname -srvm
> CYGWIN_NT-6.1-WOW64 1.7.33s(0.278/5/3) 20141017 14:39:49 i686
> 
> $ cd /var/spool/postfix/
> 
> $ ls -ld private
> drwx------+ 1 postfix none 0 Oct 18 16:39 private
> 
> $ ls -l private
> ls: cannot open directory private: Permission denied
> 
> $ ls -l private/smtp
> srw-rw-rw- 1 postfix none 0 Oct 18 16:39 private/smtp
> 
> $ cygdrop -p ChangeNotify ls -l private/smtp
> -rw-r----- 1 Unknown+User Unknown+Group 6991943424855812584 Jun 23 1909
> private/smtp
> 
> $ ls -l private/no/such/path
> ls: cannot access private/no/such/path: No such file or directory
> 
> $ cygdrop -p ChangeNotify ls -l private/no/such/path
> -rw-r----- 1 Unknown+User Unknown+Group 6991943424855812584 Jun 23 1909
> private/no/such/path

That should work better now.  I just applied a patch to CVS.


Thanks,
Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat
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