(This is an updated version of
<https://sourceware.org/ml/libc-alpha/2014-09/msg00546.html>, for the
architectures for which that has not been reviewed, combined with the
parts of <https://sourceware.org/ml/libc-alpha/2014-09/msg00559.html>
related to chown for those architectures. I've committed the reviewed
parts of the first patch and the parts of the second patch not
depending on unreviewed parts of the first. i386, s390, sh and sparc
changes have not been reviewed so far.)
Continuing the move of syscall definitions to syscalls.list, where the
removal of support for old kernel versions has made this possible,
this patch moves various definitions of chown, lchown and fchown.
In most cases the need for special syscalls.list entries (rather than
existing generic ones) is because these architectures use chown32,
lchown32 and fchown32 as syscall names. Some architectures also have
symbol versioning compatibility for older versions of chown having
been equivalent to lchown.
The aliases specified for s390-32 had the effect of exporting
__chown@@GLIBC_2.1 (but not __chown@GLIBC_2.0) despite it not being
listed in Versions files. (I'm not sure why versioned_symbol but not
compat_symbol were effective like that to create such __chown exports
in the absence of Versions entries.) The natural way to preserve that
versioned export of __chown seems to be to add it in a Versions file,
so I did so. (Maybe actually it should be a compat symbol,
__chown@GLIBC_2.1, unless there's a good reason for that export, but
this patch doesn't change anything there.)
Tested for x86.