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Message-ID: | <46978595.5070605@byu.net> |
Date: | Fri, 13 Jul 2007 08:00:53 -0600 |
From: | Eric Blake <ebb9 AT byu DOT net> |
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To: | cygwin AT cygwin DOT com |
Subject: | Re: if [ -w branching: how to spot a locked USB stick |
References: | <469715CF DOT 7090105 AT bonhard DOT uklinux DOT net> <46977404 DOT 6070105 AT byu DOT net> <20070713130620 DOT GT6851 AT calimero DOT vinschen DOT de> |
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 According to Corinna Vinschen on 7/13/2007 7:06 AM: >> Actually, this is a cygwin question. Bash's [ command only reports what >> access("/h",W_OK) tells it to report, > > It's the latter. The fact that the USB stick is locked doesn't > mean that the permission bits returned by the OS calls are augmented > to reflect the fact that the stick is not writable. All permission > bits are still intact. Only when actually trying to write to the device, > you'll get the Win32 error message equivalent of EROFS. But POSIX requires access(...,W_OK) to fail with EROFS on a read-only file system. Is there any way for cygwin to easily determine this without actually attempting a write? http://www.opengroup.org/onlinepubs/009695399/functions/access.html - -- Don't work too hard, make some time for fun as well! Eric Blake ebb9 AT byu DOT net -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (Cygwin) Comment: Public key at home.comcast.net/~ericblake/eblake.gpg Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFGl4WU84KuGfSFAYARAv2+AJ9vIZCjEAKWpuY7W1KweyhpIw7RmQCgy1kH cgUK5FvUNu2mNGTiz5BW6eY= =tq7N -----END PGP SIGNATURE----- -- 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/
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