[Bug libc/18546] mq_notify socket, recv namespace

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https://sourceware.org/bugzilla/show_bug.cgi?id=18546

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=0595c98494c25f8eaa1a3298e8fa032ad5e4405e

commit 0595c98494c25f8eaa1a3298e8fa032ad5e4405e
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Wed Jun 17 20:20:08 2015 +0000

    Fix mq_notify socket, recv namespace (bug 18546).

    mq_notify (in the 1996 edition of POSIX) brings in references to recv
    and socket (not in POSIX until the 2001 edition).  This patch fixes
    this by using __recv and __socket, exporting them from libc at version
    GLIBC_PRIVATE.

    Tested for x86_64 and x86 (testsuite and comparison of installed
    stripped shared libraries; PLT / dynamic symbol table changes render
    the comparison not particularly useful for libc).

        [BZ #18546]
        * socket/recv.c (__recv): Use libc_hidden_def.
        * socket/socket.c (__socket): Likewise.
        * sysdeps/mach/hurd/recv.c (__recv): Likewise.
        * sysdeps/mach/hurd/socket.c (__socket): Likewise.
        * sysdeps/unix/sysv/linux/generic/recv.c (__recv): Likewise.
        * sysdeps/unix/sysv/linux/recv.c (__recv): Use libc_hidden_weak.
        * sysdeps/unix/sysv/linux/socket.c (__socket): Use
        libc_hidden_def.
        * sysdeps/unix/sysv/linux/x86_64/recv.c (__recv): Use
        libc_hidden_weak.
        * include/sys/socket.h (__socket): Do not use attribute_hidden.
        Use libc_hidden_proto.
        (__recv): Likewise.
        * socket/Versions (libc): Export __recv and __socket at version
        GLIBC_PRIVATE.
        * sysdeps/unix/sysv/linux/mq_notify.c (helper_thread): Call __recv
        instead of recv.
        (init_mq_netlink): Call __socket instead of socket.
        * conform/Makefile (test-xfail-POSIX/mqueue.h/linknamespace):
        Remove variable.

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog                              |   22 ++++++++++++++++++++++
 NEWS                                   |    2 +-
 conform/Makefile                       |    1 -
 include/sys/socket.h                   |    7 ++++---
 socket/Versions                        |    1 +
 socket/recv.c                          |    1 +
 socket/socket.c                        |    1 +
 sysdeps/mach/hurd/recv.c               |    1 +
 sysdeps/mach/hurd/socket.c             |    1 +
 sysdeps/unix/sysv/linux/generic/recv.c |    1 +
 sysdeps/unix/sysv/linux/mq_notify.c    |    6 +++---
 sysdeps/unix/sysv/linux/recv.c         |    1 +
 sysdeps/unix/sysv/linux/socket.c       |    1 +
 sysdeps/unix/sysv/linux/x86_64/recv.c  |    1 +
 14 files changed, 39 insertions(+), 8 deletions(-)

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