[Bug libc/17582] __get_nprocs fgets_unlocked namespace

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https://sourceware.org/bugzilla/show_bug.cgi?id=17582

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=c4eae75271734f820a7477dbce33f8752af6f003

commit c4eae75271734f820a7477dbce33f8752af6f003
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Wed Nov 12 22:39:36 2014 +0000

    Fix __get_nprocs fgets_unlocked namespace (bug 17582).

    __get_nprocs is called from malloc code, but calls fgets_unlocked,
    which is not an ISO C or POSIX function.  This patch fixes it to call
    a new __fgets_unlocked name instead.

    Note: there are various other uses of fgets_unlocked in glibc's
    libraries, and I haven't yet investigated which others might also be
    problematic (called directly or indirectly from standard functions)
    and so need to change to use __fgets_unlocked.

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

        [BZ #17582]
        * libio/iofgets.c [weak_alias && !_IO_MTSAFE_IO]
        (__fgets_unlocked): Add alias of _IO_fgets.  Use libc_hidden_def.
        * libio/iofgets_u.c (fgets_unlocked): Rename to __fgets_unlocked
        and define as weak alias of __fgets_unlocked.  Use
        libc_hidden_weak.
        (__fgets_unlocked): Use libc_hidden_def.
        * include/stdio.h (__fgets_unlocked): Declare.  Use
        libc_hidden_proto.
        * sysdeps/unix/sysv/linux/getsysstats.c (phys_pages_info): Use
        __fgets_unlocked instead of fgets_unlocked.
        * sysdeps/unix/sysv/linux/alpha/getsysstats.c
        (GET_NPROCS_CONF_PARSER): Likewise.
        * sysdeps/unix/sysv/linux/sparc/getsysstats.c
        (GET_NPROCS_CONF_PARSER): Likewise.

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

Summary of changes:
 ChangeLog                                   |   16 ++++++++++++++++
 NEWS                                        |    2 +-
 include/stdio.h                             |    2 ++
 libio/iofgets.c                             |    2 ++
 libio/iofgets_u.c                           |    6 ++++--
 sysdeps/unix/sysv/linux/alpha/getsysstats.c |    2 +-
 sysdeps/unix/sysv/linux/getsysstats.c       |    2 +-
 sysdeps/unix/sysv/linux/sparc/getsysstats.c |    2 +-
 8 files changed, 28 insertions(+), 6 deletions(-)

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