On Mar 7 08:36, Eric Blake wrote: > According to Paul McFerrin on 3/7/2009 12:49 AM: > > I've been reading: > > http://cygwin.com/1.7/cygwin-ug-net/ntsec.html#ntsec-files > > on the execute permissions. Did I read that it was impossible to deny > > execute permissions?? In my tests, the follow is always "true" if a > > file has no execute permissions: (mode 666 or 000) > > [ -x apachectl ] > > test -x apachectl > > for all of the shells > > Are you operating as an administrator? Just as in Linux, the superuser > has the privilege of executing any file regardless of its permissions. > test -x uses access() and not stat() to determine the answer of whether > the file is executable for the currently logged on user, so this is > accurately reporting what you are able to do with the file, regardless of > what the permission bits are on the file.
That's not quite right. The execute bit is not affected from being an admin or not. Here's an access check on Cygwin using one of my test hacks. Hein is just some user, corinna is an admin: $ ls -l [~]$ ll x.* -rw------- 1 hein vinschen 360 Feb 13 15:24 x.c -rwx------ 1 hein vinschen 34352 Feb 13 18:40 x.exe $ tests/access x.c access (x.c, F_OK) = 0 access (x.c, R_OK) = 0 access (x.c, W_OK) = 0 access (x.c, X_OK) = -1 <Permission denied> $ tests/access x.exe access (x.c, F_OK) = 0 access (x.c, R_OK) = 0 access (x.c, W_OK) = 0 access (x.c, X_OK) = -1 <Permission denied> That's different from Linux BTW, because the x.exe check would have allowed root to execute x.exe. Linux does so if any single execute bit is set in the permission bits. But that's not the case on Windows and the above access result actually reflects the truth. As for the -x apachectl check in Paul's case, it doesn't work that way for me: $ test -x x.c && echo exe || echo no-exe no-exe I'm wondering if the file apachectl has a somewhat more complicated ACL. The ouptut of `cacls apachectl' might give a hint. Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Project Co-Leader cygwin AT cygwin DOT com Red Hat -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
