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Date: | Wed, 08 Jan 2003 23:15:16 -0500 |
To: | cygwin-developers AT cygwin DOT com |
From: | "Pierre A. Humblet" <Pierre DOT Humblet AT ieee DOT org> |
Subject: | stat with no READ_CONTROL |
Mime-Version: | 1.0 |
Corinna, when stat is called on a file with a non-readable security descriptor (e.g. because of no READ_CONTROL permission), read_sd fails but stat still succeeds. However the uid and gid are set to garbage (uninitialized automatic variables) and the modes are from nontsec, rw-r--r--. Other info, such as the times and size, can be correct. The question is what to do about it. According to posix <http://www.opengroup.org/onlinepubs/007908799/xsh/fstat.html> stat can (additional or alternative file access control mechanisms) and must (cannot provide correct info) fail. A consequence of this hard nosed approach is that ls -l may not show all files. To avoid that, stat could return uid = gid = -1 and modes = 0. Which is best in this case: conformance to posix or user friendliness? Pierre
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