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Re: tar --atime-preserve with an empty file triggers a warning
On Mar 7 08:07, Eric Blake wrote:
> [adding bug-tar]
> On 03/07/2011 07:43 AM, Corinna Vinschen wrote:
> > THis looks like a tar bug, per the strace. For some reason, if the
> > file is empty, tar calls futimens on file descriptor 0 (which is
> > connected to /dev/tty1 in my case), while it call futimens on
> > file descriptor 4 (connected to the file empty) if the file empty
> > is... well, not empty.
> This is indeed multiple bug reports for the price of 1 :)
> Finally, cygwin is failing with EINVAL for futimens on a pty fd.
> However, I don't know if that's something that we can change, since
> cygwin doesn't really maintain a notion of changeable times on ptys at
> the moment.
Please take this as granted for now. Ptys/ttys are implemented using
other Windows objects (events, pipes, etc) and none of them supports
setting a file time. I don't know if faking the ability to set the
filetime is really feasible.
Maybe we should just return EPERM?
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Project Co-Leader cygwin AT cygwin DOT com
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