[Libreoffice-bugs] [Bug 43095] New: File access rights are not determined correctly (OpenAFS, ACLs)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=43095

             Bug #: 43095
           Summary: File access rights are not determined correctly
                    (OpenAFS, ACLs)
    Classification: Unclassified
           Product: LibreOffice
           Version: LibO Master
          Platform: All
        OS/Version: Linux (All)
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Libreoffice
        AssignedTo: libreoffice-bugs at lists.freedesktop.org
        ReportedBy: mbechler at eenterphace.org


Created attachment 53691
  --> https://bugs.freedesktop.org/attachment.cgi?id=53691
Patch to allow the use of real access() calls

Hi,

this is a bug inherited from OOo (#101891, unfixed for more than 2 years): File
permissions are determined by a stat() call and manually checking the
permission map. This is plain wrong when filesystems not using UNIX semantics
(e.g. OpenAFS or Linux ACLs) are in place, and causes perfectly writeable files
(haven't checked that behaviour with libreoffice, but its wrong anyways) to
open write-protected. Instead access() calls must be used to determine
readability and writeablitity. On the other side it seems there have been
problems using access() in the past:

> We don't use access(...) because access follows links which
> may cause performance problems see #97133.

(comment in sal/osl/unx/file_stat.cxx)

If that's still the case it would be nice to have a compile time option to
switch between the two behaviours. 


Patch against master is attached.

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