"permission denied" issues when removing files/folders created by cygwin
As a note, after using cygwin to build some libraries (worked well, thanks team!) when trying to delete a folder via windows explorer, I got the message "Destination folder access denied, you need to confirm this action" (followed by a UAC prompt) and also "Delete folder, Invalid MS-DOS function" It appears the problem lies with creating a file named "NUL" windows utilities just don't know how to deal with it (you can recreate it by creating a folder, then from cygwin bash $ touch NUL) then try and remove the folder with windows explorer. I would not have expected cygwin to allow itself the privilege of creating files that are unremovable by windows explorer, but I just thought I'd throw it out there. Cheers! -roger- -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
Re: "permission denied" issues when removing files/folders created by cygwin
On Tue, Sep 1, 2015 at 12:48 PM, Roger Pack wrote: > It appears the problem lies with creating a file named "NUL" windows > utilities just don't know how to deal with it (you can recreate it by > creating a folder, then from cygwin bash $ touch NUL) then try and > remove the folder with windows explorer. The utilities "know" how to deal with it, given their design: http://blogs.msdn.com/b/oldnewthing/archive/2003/10/22/55388.aspx -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
Re: "permission denied" issues when removing files/folders created by cygwin
On Sep 1 13:05, Michael Enright wrote: > On Tue, Sep 1, 2015 at 12:48 PM, Roger Pack wrote: > > It appears the problem lies with creating a file named "NUL" windows > > utilities just don't know how to deal with it (you can recreate it by > > creating a folder, then from cygwin bash $ touch NUL) then try and > > remove the folder with windows explorer. > > The utilities "know" how to deal with it, given their design: > http://blogs.msdn.com/b/oldnewthing/archive/2003/10/22/55388.aspx And then there's https://cygwin.com/cygwin-ug-net/using-specialnames.html#pathnames-dosdevices You can create and delete those files even in CMD, btw. You just have to use the long pathname prefix "\\?\", e.g.: bash$ cmd /c 'echo foo > \\?\c:\cygwin64\home\corinna\nul' bash$ ls -l nul -rwxr-xr-x 1 corinna vinschen 6 Sep 1 22:30 nul delete with bash$ rm nul or bash$ cmd /c 'del \\?\c:\cygwin64\home\corinna\nul' Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Maintainer cygwin AT cygwin DOT com Red Hat pgphMGYMkB3ef.pgp Description: PGP signature
Re: "permission denied" issues when removing files/folders created by cygwin
On 9/1/15, Corinna Vinschen wrote: > On Sep 1 13:05, Michael Enright wrote: >> On Tue, Sep 1, 2015 at 12:48 PM, Roger Pack wrote: >> > It appears the problem lies with creating a file named "NUL" windows >> > utilities just don't know how to deal with it (you can recreate it by >> > creating a folder, then from cygwin bash $ touch NUL) then try and >> > remove the folder with windows explorer. >> >> The utilities "know" how to deal with it, given their design: >> http://blogs.msdn.com/b/oldnewthing/archive/2003/10/22/55388.aspx > > And then there's > > https://cygwin.com/cygwin-ug-net/using-specialnames.html#pathnames-dosdevices > > You can create and delete those files even in CMD, btw. You just have > to use the long pathname prefix "\\?\", e.g.: > > bash$ cmd /c 'echo foo > \\?\c:\cygwin64\home\corinna\nul' > bash$ ls -l nul > -rwxr-xr-x 1 corinna vinschen 6 Sep 1 22:30 nul > > delete with > > bash$ rm nul > > or > > bash$ cmd /c 'del \\?\c:\cygwin64\home\corinna\nul' Yeah this works. Windows explorer is not as clever unfortunately, so lay users would find trouble here (my particular case is they install a local copy of cygwin which cross compile's something for them--no knowledge of cygwin required--but then suddenly they find they cannot remove folders through any easy means...) Cheers! -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
Re: "permission denied" issues when removing files/folders created by cygwin
Roger Pack gmail.com> writes: > It appears the problem lies with creating a file named "NUL" windows > utilities just don't know how to deal with it (you can recreate it by > creating a folder, then from cygwin bash $ touch NUL) then try and > remove the folder with windows explorer. That is likely a bug in the build system of whatever you were trying to build, I can't think of any reason why under Cygwin it wouldn't use /dev/null instead of NUL (that's a device name under Windows for compatibility with DOS). Regards, Achim. -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
