On 1/26/06, Eric Blake <[EMAIL PROTECTED]> wrote: > > mkdir (also syscall) return "Permission denied" when its argument refers to > > a mountpoint at the top of windows drive (probably also a windows mount, > > I haven't tried). > > For example: > > $ mount d: /d > > $ mkdir / > > mkdir: cannot create directory `/': File exists > > $ mkdir /d > > mkdir: cannot create directory `/d': Permission denied > > $ mkdir /d/tmp > > mkdir: cannot create directory `/d/tmp': File exists > > I raised this issue before, and the conclusion was that > POSIX permits this behavior (the mkdir must fail, but > is permitted to fail for ANY of the permissible errno > values that apply to the situation when more than > one failure mode is present). Therefore, it is highly > likely that no change will be made to cygwin.
Pity. > > This is highly unexpected, does not match linux behaviour (it returns > > EEXIST), > > and actually breaks git (git clone, creation of pathnames, to be precise). > > Then git has a bug. Report it there. To be portable > when making pathnames, you must first check > for directory existance rather than relying on an > errno of EEXIST to tell you the directory exists. How do you do it race-free? No, I don't think it is a bug in git, or in any code which expects EEXIST from mkdir in case an entry actually just plain does exist. > This is not even cygwin-specific. It is possible on > Linux to have /usr mounted on a read-only filesystem, > then /usr/local mounted in a writable location, > such that the call "mkdir -p /usr/local/dir" will get > EROFS on the /usr component rather than EEXIST > (trust me - the coreutils code for mkdir faced this > very same issue in 5.90, and was fixed in time for > the current 5.93). Are you sure? Linux 2.6.15. It correctly reports EEXIST on /usr and /usr/local and creates /usr/local/dir. I'd consider that a bug, if it were otherwise. The reason of racing alone if enough. -- 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/
