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[Bug libc/18527] getlogin_r namespace


https://sourceware.org/bugzilla/show_bug.cgi?id=18527

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=5371d99e8766f25864ddf20fb0866e57fc0b7991

commit 5371d99e8766f25864ddf20fb0866e57fc0b7991
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Fri Jun 12 20:02:30 2015 +0000

    Fix getlogin_r namespace (bug 18527).

    Various functions in XPG4 bring in references to getlogin_r, which is
    not in XPG4; this is also a bug for some older POSIX versions which
    aren't yet covered by the linknamespace tests.  This patch fixes this
    by making getlogin_r into a weak alias for __getlogin_r and using
    __getlogin_r as needed.

    Tested for x86_64 and x86 (testsuite, and that disassembly of
    installed stripped shared libraries is unchanged by the patch).

        [BZ #18527]
        * login/getlogin_r.c (getlogin_r): Rename to __getlogin_r and
        define as weak alias of __getlogin_r.  Use libc_hidden_weak.
        * sysdeps/mach/hurd/getlogin_r.c (getlogin_r): Likewise.
        * sysdeps/unix/getlogin_r.c (getlogin_r): Likewise.
        * sysdeps/unix/sysv/linux/getlogin_r.c (getlogin_r): Likewise.
        * include/unistd.h (__getlogin_r): Declare.  Use
        libc_hidden_proto.
        * posix/glob.c (glob): Call __getlogin_r instead of getlogin_r.
        * conform/Makefile (test-xfail-XPG3/glob.h/linknamespace): Remove
        variable.
        (test-xfail-XPG3/wordexp.h/linknamespace): Likewise.
        (test-xfail-XPG4/glob.h/linknamespace): Likewise.
        (test-xfail-XPG4/wordexp.h/linknamespace): Likewise.

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

Summary of changes:
 ChangeLog                            |   17 +++++++++++++++++
 NEWS                                 |    2 +-
 conform/Makefile                     |    4 ----
 include/unistd.h                     |    2 ++
 login/getlogin_r.c                   |    6 ++++--
 posix/glob.c                         |    2 +-
 sysdeps/mach/hurd/getlogin_r.c       |    6 ++++--
 sysdeps/unix/getlogin_r.c            |    6 ++++--
 sysdeps/unix/sysv/linux/getlogin_r.c |   10 ++++++----
 9 files changed, 39 insertions(+), 16 deletions(-)

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