[Bug libc/17584] __getcwd rewinddir namespace

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https://sourceware.org/bugzilla/show_bug.cgi?id=17584

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=2f5c1b000aaeb2c25b1df52453bba8de7f9453e2

commit 2f5c1b000aaeb2c25b1df52453bba8de7f9453e2
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Wed Nov 12 16:24:16 2014 +0000

    Fix __getcwd rewinddir namespace (bug 17584).

    __getcwd is called from dcigettext.o (brought in by various ISO C
    functionality), but calls rewinddir, which is not an ISO C function.
    This patch makes __getcwd call __rewinddir instead and makes rewinddir
    a weak alias for __rewinddir.

    Since getcwd.c is shared with gnulib (albeit not merged in either
    direction for a long time, and omitted from gnulib's
    config/srclist.txt list of shared files) I put in a #ifndef _LIBC
    define of __rewinddir to rewinddir, although a future merged version
    of getcwd could end up looking significantly different.

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

        [BZ #17584]
        * dirent/rewinddir.c (rewinddir): Rename to __rewinddir and define
        as weak alias of __rewinddir.  Don't use libc_hidden_def.
        (__rewinddir): Use libc_hidden_def.
        * sysdeps/mach/hurd/rewinddir.c: Rename to __rewinddir and define
        as weak alias of __rewinddir.  Don't use libc_hidden_def.
        (__rewinddir): Use libc_hidden_def.
        * sysdeps/posix/rewinddir.c: Rename to __rewinddir and define as
        weak alias of __rewinddir.  Don't use libc_hidden_def.
        (__rewinddir): Use libc_hidden_def.
        * include/dirent.h (rewinddir): Don't use libc_hidden_proto.
        (__rewinddir): Use libc_hidden_proto.
        * sysdeps/posix/getcwd.c [!_LIBC] (__rewinddir): Define to
        rewinddir.
        (__getcwd): Use __rewinddir instead of rewinddir.

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

Summary of changes:
 ChangeLog                     |   16 ++++++++++++++++
 NEWS                          |    2 +-
 dirent/rewinddir.c            |    5 +++--
 include/dirent.h              |    3 ++-
 sysdeps/mach/hurd/rewinddir.c |    5 +++--
 sysdeps/posix/getcwd.c        |    6 +++++-
 sysdeps/posix/rewinddir.c     |    5 +++--
 7 files changed, 33 insertions(+), 9 deletions(-)

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