[Bug libc/5778] New: pathconf(path,_PC_CHOWN_RESTRICTED) does not work correctly under Linux

["axel dot philipp at mtu dot de" <sourceware-bugzilla at sourceware dot org>]

pathconf(path,_PC_CHOWN_RESTRICTED)always returns POSIX_CHOWN_RESTRICTED even 
if the filesystem where path is located is configured to allow unrestricted 
chown. 

This seems to be an inconsistency between kernel, glibc and LSB. although the 
Linux syscall chown allows unpriviliged users to chown files if the filesystem 
does, LSB 3.2 core generic para. 13.4.79 mandates that POSIX_CHOWN_RESTRICTED 
be defined as 1. This variable should be undefined because that feature 
definitely depends on filesystem and need not be the same for all fs on a host.

But even if POSIX_CHOWN_RESTRICTED were undefined, pathconf would return the 
wrong value since it always returns -1 in that case.

I checked today http://sources.redhat.com/cgi-
bin/cvsweb.cgi/libc/sysdeps/posix/?cvsroot=glibc, pathconf.c is the same since 
2003, I tested with 2.3.5.

Filesystems with unrestricted chown can be local (XFS 
with /proc/sys/fs/xfs/restrict_chown=0) or NFS mounted.

-- 
           Summary: pathconf(path,_PC_CHOWN_RESTRICTED) does not work
                    correctly under Linux
           Product: glibc
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
        AssignedTo: drepper at redhat dot com
        ReportedBy: axel dot philipp at mtu dot de
                CC: glibc-bugs at sources dot redhat dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=5778

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