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Re: [PATCH v3 3/3] libio: fmemopen rewrite to POSIX compliance


ping.

On 07-07-2014 15:00, Adhemerval Zanella wrote:
> ping.
>
> On 02-07-2014 09:29, Adhemerval Zanella wrote:
>> Hi,
>>
>> This is a small update on the previous fmemopen patch I have sent [1].
>> the change is basically:
>>
>> * 'w' mode does not truncate the buffer, only 'w+'
>>
>> I also rebased against master to adjust NEWS file.
>>
>> [1] https://sourceware.org/ml/libc-alpha/2014-06/msg00878.html
>>
>> --
>>
>> 	[BZ #6544]
>> 	[BZ #11216]
>> 	[BZ #12836]
>> 	[BZ #13151]
>> 	[BZ #13152]
>> 	[BZ #14292]
>> 	* include/stdio.h (fmemopen): Remove hidden prototype.
>> 	(__fmemopen): Add new hidden prototype.
>> 	* libio/Makefile: Add oldfmemopen object.
>> 	* libio/Versions [GLIBC_2.20]: Add new fmemopen symbol.
>> 	* libio/fmemopen.c (__fmemopen): Function rewrite to be POSIX
>> 	compliance.
>> 	* libio/oldfmemopen.c: New file: old fmemopen implementation for
>> 	symbol compatibility.
>> 	* stdio-common/Makefile [tests]: Add new tst-fmemopen3.
>> 	* stdio-common/psiginfo.c [psiginfo]: Call __fmemopen instead of
>> 	fmemopen.
>> 	* stdio-common/tst-fmemopen3.c: New file: more fmemopen tests, focus
>> 	on append and read mode.
>> 	* sysdeps/unix/sysv/linux/aarch64/nptl/libc.abilist [GLIBC_2.20]: Add
>> 	fmemopen.
>> 	* sysdeps/unix/sysv/linux/alpha/libc.abilist [GLIBC_2.20]: Likewise.
>> 	* sysdeps/unix/sysv/linux/arm/libc.abilist [GLIBC_2.20]: Likewise.
>> 	* sysdeps/unix/sysv/linux/i386/libc.abilist [GLIBC_2.20]: Likewise.
>> 	* sysdeps/unix/sysv/linux/ia64/nptl/libc.abilist [GLIBC_2.20]:
>> 	Likewise.
>> 	* sysdeps/unix/sysv/linux/m68k/coldfire/nptl/libc.abilist
>> 	[GLIBC_2.20]: Likewise.
>> 	* sysdeps/unix/sysv/linux/m68k/m680x0/nptl/libc.abilist [GLIBC_2.20]:
>> 	Likewise.
>> 	* sysdeps/unix/sysv/linux/microblaze/nptl/libc.abilist [GLIBC_2.20]:
>> 	Likewise.
>> 	* sysdeps/unix/sysv/linux/mips/mips32/fpu/nptl/libc.abilist
>> 	[GLIBC_2.20]: Likewise.
>> 	* sysdeps/unix/sysv/linux/mips/mips32/nofpu/nptl/libc.abilist
>> 	[GLIBC_2.20]: Likewise.
>> 	* sysdeps/unix/sysv/linux/mips/mips64/n32/nptl/libc.abilist
>> 	[GLIBC_2.20]: Likewise.
>> 	* sysdeps/unix/sysv/linux/mips/mips64/n64/nptl/libc.abilist
>> 	[GLIBC_2.20]: Likewise.
>> 	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/nptl/libc.abilist
>> 	[GLIBC_2.20]: Likewise.
>> 	* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/nptl/libc.abilist
>> 	[GLIBC_2.20]: Likewise.
>> 	* sysdeps/unix/sysv/linux/powerpc/powerpc64/nptl/libc.abilist
>> 	[GLIBC_2.20]: Likewise.
>> 	* sysdeps/unix/sysv/linux/s390/s390-32/nptl/libc.abilist [GLIBC_2.20]:
>> 	Likewise.
>> 	* sysdeps/unix/sysv/linux/s390/s390-64/nptl/libc.abilist [GLIBC_2.20]:
>> 	Likewise.
>> 	* sysdeps/unix/sysv/linux/sh/nptl/libc.abilist [GLIBC_2.20]: Likewise.
>> 	* sysdeps/unix/sysv/linux/sparc/sparc32/nptl/libc.abilist
>> 	[GLIBC_2.20]: Likewise.
>> 	* sysdeps/unix/sysv/linux/sparc/sparc64/nptl/libc.abilist
>> 	[GLIBC_2.20]: Likewise.
>> 	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libc.abilist
>> 	[GLIBC_2.20]: Likewise.
>> 	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libc.abilist
>> 	[GLIBC_2.20]: Likewise.
>> 	* sysdeps/unix/sysv/linux/tile/tilepro/libc.abilist [GLIBC_2.20]:
>> 	Likewise.
>> 	* sysdeps/unix/sysv/linux/x86_64/64/libc.abilist [GLIBC_2.20]:
>> 	Likewise.
>> 	* sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist [GLIBC_2.20]:
>> 	Likewise.
>>
>> ---
>>
>> diff --git a/NEWS b/NEWS
>> index a07ea66..7a0851e 100644
>> --- a/NEWS
>> +++ b/NEWS
>> @@ -9,19 +9,20 @@ Version 2.20
>>
>>  * The following bugs are resolved with this release:
>>
>> -  6804, 9894, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347, 15514,
>> -  15698, 15804, 15894, 15946, 16002, 16064, 16095, 16198, 16284, 16287,
>> -  16315, 16348, 16349, 16354, 16357, 16362, 16447, 16516, 16532, 16539,
>> -  16545, 16561, 16562, 16564, 16574, 16599, 16600, 16609, 16610, 16611,
>> -  16613, 16619, 16623, 16629, 16632, 16634, 16639, 16642, 16648, 16649,
>> -  16670, 16674, 16677, 16680, 16681, 16683, 16689, 16695, 16701, 16706,
>> -  16707, 16712, 16713, 16714, 16724, 16731, 16739, 16740, 16743, 16754,
>> -  16758, 16759, 16760, 16770, 16786, 16789, 16791, 16796, 16799, 16800,
>> -  16815, 16823, 16824, 16831, 16838, 16849, 16854, 16876, 16877, 16878,
>> -  16882, 16885, 16888, 16890, 16912, 16915, 16916, 16917, 16918, 16922,
>> -  16927, 16928, 16932, 16943, 16958, 16965, 16966, 16967, 16977, 16978,
>> -  16984, 16990, 16996, 17009, 17022, 17031, 17042, 17048, 17050, 17058,
>> -  17061, 17062, 17069, 17075, 17079, 17084, 17086, 17092, 17097.
>> +  6544, 6804, 9894, 11216, 12836, 12994, 13151, 13152, 13347, 13651, 14292,
>> +  14308, 14770, 15119, 15132, 15347, 15514, 15698, 15804, 15894, 15946,
>> +  16002, 16064, 16095, 16198, 16284, 16287, 16315, 16348, 16349, 16354,
>> +  16357, 16362, 16447, 16516, 16532, 16539, 16545, 16561, 16562, 16564,
>> +  16574, 16599, 16600, 16609, 16610, 16611, 16613, 16619, 16623, 16629,
>> +  16632, 16634, 16639, 16642, 16648, 16649, 16670, 16674, 16677, 16680,
>> +  16681, 16683, 16689, 16695, 16701, 16706, 16707, 16712, 16713, 16714,
>> +  16724, 16731, 16739, 16740, 16743, 16754, 16758, 16759, 16760, 16770,
>> +  16786, 16789, 16791, 16796, 16799, 16800, 16815, 16823, 16824, 16831,
>> +  16838, 16849, 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890,
>> +  16912, 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943,
>> +  16958, 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009,
>> +  17022, 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075,
>> +  17079, 17084, 17086, 17092, 17097.
>>
>>  * Optimized strchr implementation for AArch64.  Contributed by ARM Ltd.
>>
>> diff --git a/include/stdio.h b/include/stdio.h
>> index 9f2ea31..94ba5a5 100644
>> --- a/include/stdio.h
>> +++ b/include/stdio.h
>> @@ -152,7 +152,6 @@ libc_hidden_proto (fread_unlocked)
>>  libc_hidden_proto (fwrite_unlocked)
>>  libc_hidden_proto (fgets_unlocked)
>>  libc_hidden_proto (fputs_unlocked)
>> -libc_hidden_proto (fmemopen)
>>  libc_hidden_proto (open_memstream)
>>  libc_hidden_proto (__libc_fatal)
>>  libc_hidden_proto (__vsprintf_chk)
>> @@ -180,6 +179,9 @@ gets (char *__str)
>>  }
>>  #  endif
>>
>> +extern FILE * __fmemopen (void *buf, size_t len, const char *mode);
>> +libc_hidden_proto (__fmemopen)
>> +
>>  __END_DECLS
>>  # endif
>>
>> diff --git a/libio/Makefile b/libio/Makefile
>> index 56952ce..c76b37e 100644
>> --- a/libio/Makefile
>> +++ b/libio/Makefile
>> @@ -46,7 +46,7 @@ routines	:=							      \
>>  	__fbufsize __freading __fwriting __freadable __fwritable __flbf	      \
>>  	__fpurge __fpending __fsetlocking				      \
>>  									      \
>> -	libc_fatal fmemopen
>> +	libc_fatal fmemopen oldfmemopen
>>
>>  tests = tst_swprintf tst_wprintf tst_swscanf tst_wscanf tst_getwc tst_putwc   \
>>  	tst_wprintf2 tst-widetext test-fmemopen tst-ext tst-ext2 \
>> diff --git a/libio/Versions b/libio/Versions
>> index 8df89d2..7ffa64d 100644
>> --- a/libio/Versions
>> +++ b/libio/Versions
>> @@ -148,6 +148,10 @@ libc {
>>    GLIBC_2.4 {
>>      open_wmemstream;
>>    }
>> +  GLIBC_2.20 {
>> +    # f*
>> +    fmemopen;
>> +  }
>>    GLIBC_PRIVATE {
>>      # Used by NPTL and librt
>>      __libc_fatal;
>> diff --git a/libio/fmemopen.c b/libio/fmemopen.c
>> index aee2696..53e9d57 100644
>> --- a/libio/fmemopen.c
>> +++ b/libio/fmemopen.c
>> @@ -1,7 +1,6 @@
>> -/* Fmemopen implementation.
>> -   Copyright (C) 2000-2014 Free Software Foundation, Inc.
>> +/* fmemopen implementation.
>> +   Copyright (C) 2014 Free Software Foundation, Inc.
>>     This file is part of the GNU C Library.
>> -   Contributed by Hanno Mueller, kontakt@hanno.de, 2000.
>>
>>     The GNU C Library is free software; you can redistribute it and/or
>>     modify it under the terms of the GNU Lesser General Public
>> @@ -17,54 +16,10 @@
>>     License along with the GNU C Library; if not, see
>>     <http://www.gnu.org/licenses/>.  */
>>
>> -/*
>> - * fmemopen() - "my" version of a string stream
>> - * Hanno Mueller, kontakt@hanno.de
>> - *
>> - *
>> - * I needed fmemopen() for an application that I currently work on,
>> - * but couldn't find it in libio. The following snippet of code is an
>> - * attempt to implement what glibc's documentation describes.
>> - *
>> - *
>> - *
>> - * I already see some potential problems:
>> - *
>> - * - I never used the "original" fmemopen(). I am sure that "my"
>> - *   fmemopen() behaves differently than the original version.
>> - *
>> - * - The documentation doesn't say wether a string stream allows
>> - *   seeks. I checked the old fmemopen implementation in glibc's stdio
>> - *   directory, wasn't quite able to see what is going on in that
>> - *   source, but as far as I understand there was no seek there. For
>> - *   my application, I needed fseek() and ftell(), so it's here.
>> - *
>> - * - "append" mode and fseek(p, SEEK_END) have two different ideas
>> - *   about the "end" of the stream.
>> - *
>> - *   As described in the documentation, when opening the file in
>> - *   "append" mode, the position pointer will be set to the first null
>> - *   character of the string buffer (yet the buffer may already
>> - *   contain more data). For fseek(), the last byte of the buffer is
>> - *   used as the end of the stream.
>> - *
>> - * - It is unclear to me what the documentation tries to say when it
>> - *   explains what happens when you use fmemopen with a NULL
>> - *   buffer.
>> - *
>> - *   Quote: "fmemopen [then] allocates an array SIZE bytes long. This
>> - *   is really only useful if you are going to write things to the
>> - *   buffer and then read them back in again."
>> - *
>> - *   What does that mean if the original fmemopen() did not allow
>> - *   seeking? How do you read what you just wrote without seeking back
>> - *   to the beginning of the stream?
>> - *
>> - * - I think there should be a second version of fmemopen() that does
>> - *   not add null characters for each write. (At least in my
>> - *   application, I am not actually using strings but binary data and
>> - *   so I don't need the stream to add null characters on its own.)
>> - */
>> +/* fmemopen() from 2.20 and forward works as defined by POSIX.  It also
>> +   provides an older symbol, version 2.2.5, that behaves different regarding
>> +   SEEK_END (libio/oldfmemopen.c).  */
>> +
>>
>>  #include <errno.h>
>>  #include <libio.h>
>> @@ -79,25 +34,23 @@
>>  typedef struct fmemopen_cookie_struct fmemopen_cookie_t;
>>  struct fmemopen_cookie_struct
>>  {
>> -  char *buffer;
>> -  int mybuffer;
>> -  int binmode;
>> -  size_t size;
>> -  _IO_off64_t pos;
>> -  size_t maxpos;
>> +  char        *buffer;   /* memory buffer.  */
>> +  int         mybuffer;  /* own allocated buffer?  */
>> +  int         append;    /* buffer openened for append?  */
>> +  size_t      size;      /* buffer length in bytes.  */
>> +  _IO_off64_t pos;       /* current position at the buffer.  */
>> +  size_t      maxpos;    /* max position in buffer.  */
>>  };
>>
>>
>>  static ssize_t
>>  fmemopen_read (void *cookie, char *b, size_t s)
>>  {
>> -  fmemopen_cookie_t *c;
>> -
>> -  c = (fmemopen_cookie_t *) cookie;
>> +  fmemopen_cookie_t *c = (fmemopen_cookie_t *) cookie;
>>
>> -  if (c->pos + s > c->size)
>> +  if (c->pos + s > c->maxpos)
>>      {
>> -      if ((size_t) c->pos == c->size)
>> +      if ((size_t) c->pos == c->maxpos)
>>  	return 0;
>>        s = c->size - c->pos;
>>      }
>> @@ -115,29 +68,28 @@ fmemopen_read (void *cookie, char *b, size_t s)
>>  static ssize_t
>>  fmemopen_write (void *cookie, const char *b, size_t s)
>>  {
>> -  fmemopen_cookie_t *c;
>> +  fmemopen_cookie_t *c = (fmemopen_cookie_t *) cookie;;
>> +  _IO_off64_t pos = c->append ? c->maxpos : c->pos;
>>    int addnullc;
>>
>> -  c = (fmemopen_cookie_t *) cookie;
>> -
>> -  addnullc = c->binmode == 0 && (s == 0 || b[s - 1] != '\0');
>> +  addnullc = (s == 0 || b[s - 1] != '\0');
>>
>> -  if (c->pos + s + addnullc > c->size)
>> +  if (pos + s + addnullc > c->size)
>>      {
>> -      if ((size_t) (c->pos + addnullc) == c->size)
>> +      if ((size_t) (pos + addnullc) >= c->size)
>>  	{
>>  	  __set_errno (ENOSPC);
>>  	  return 0;
>>  	}
>> -      s = c->size - c->pos - addnullc;
>> +      s = c->size - pos - addnullc;
>>      }
>>
>> -  memcpy (&(c->buffer[c->pos]), b, s);
>> +  memcpy (&(c->buffer[pos]), b, s);
>>
>> -  c->pos += s;
>> -  if ((size_t) c->pos > c->maxpos)
>> +  pos += s;
>> +  if ((size_t) pos > c->maxpos)
>>      {
>> -      c->maxpos = c->pos;
>> +      c->maxpos = pos;
>>        if (addnullc)
>>  	c->buffer[c->maxpos] = '\0';
>>      }
>> @@ -150,9 +102,7 @@ static int
>>  fmemopen_seek (void *cookie, _IO_off64_t *p, int w)
>>  {
>>    _IO_off64_t np;
>> -  fmemopen_cookie_t *c;
>> -
>> -  c = (fmemopen_cookie_t *) cookie;
>> +  fmemopen_cookie_t *c = (fmemopen_cookie_t *) cookie;
>>
>>    switch (w)
>>      {
>> @@ -165,7 +115,7 @@ fmemopen_seek (void *cookie, _IO_off64_t *p, int w)
>>        break;
>>
>>      case SEEK_END:
>> -      np = (c->binmode ? c->size : c->maxpos) - *p;
>> +      np = c->maxpos + *p;
>>        break;
>>
>>      default:
>> @@ -184,9 +134,7 @@ fmemopen_seek (void *cookie, _IO_off64_t *p, int w)
>>  static int
>>  fmemopen_close (void *cookie)
>>  {
>> -  fmemopen_cookie_t *c;
>> -
>> -  c = (fmemopen_cookie_t *) cookie;
>> +  fmemopen_cookie_t *c = (fmemopen_cookie_t *) cookie;
>>
>>    if (c->mybuffer)
>>      free (c->buffer);
>> @@ -197,18 +145,11 @@ fmemopen_close (void *cookie)
>>
>>
>>  FILE *
>> -fmemopen (void *buf, size_t len, const char *mode)
>> +__fmemopen (void *buf, size_t len, const char *mode)
>>  {
>>    cookie_io_functions_t iof;
>>    fmemopen_cookie_t *c;
>>
>> -  if (__glibc_unlikely (len == 0))
>> -    {
>> -    einval:
>> -      __set_errno (EINVAL);
>> -      return NULL;
>> -    }
>> -
>>    c = (fmemopen_cookie_t *) malloc (sizeof (fmemopen_cookie_t));
>>    if (c == NULL)
>>      return NULL;
>> @@ -231,26 +172,38 @@ fmemopen (void *buf, size_t len, const char *mode)
>>        if (__glibc_unlikely ((uintptr_t) len > -(uintptr_t) buf))
>>  	{
>>  	  free (c);
>> -	  goto einval;
>> +	  __set_errno (EINVAL);
>> +	  return NULL;
>>  	}
>>
>>        c->buffer = buf;
>>
>> -      if (mode[0] == 'w')
>> +      /* POSIX states that w+ mode should truncate the buffer.  */
>> +      if (mode[0] == 'w' && mode[1] == '+')
>>  	c->buffer[0] = '\0';
>>
>>        c->maxpos = strnlen (c->buffer, len);
>>      }
>>
>> +
>> +  /* Mode   |  starting position (cookie::pos) |          size (cookie::size)
>> +   * ------ |----------------------------------|-----------------------------
>> +   * read   |          beginning of the buffer |                size argument
>> +   * write  |          beginning of the buffer |                         zero
>> +   * append |    first null or size buffer + 1 |  first null or size argument
>> +   */
>> +
>>    c->size = len;
>>
>> -  if (mode[0] == 'a')
>> +  if (mode[0] == 'r')
>> +    c->maxpos = len;
>> +
>> +  c->append = mode[0] == 'a';
>> +  if (c->append)
>>      c->pos = c->maxpos;
>>    else
>>      c->pos = 0;
>>
>> -  c->binmode = mode[0] != '\0' && mode[1] == 'b';
>> -
>>    iof.read = fmemopen_read;
>>    iof.write = fmemopen_write;
>>    iof.seek = fmemopen_seek;
>> @@ -258,4 +211,5 @@ fmemopen (void *buf, size_t len, const char *mode)
>>
>>    return _IO_fopencookie (c, mode, iof);
>>  }
>> -libc_hidden_def (fmemopen)
>> +libc_hidden_def (__fmemopen)
>> +versioned_symbol (libc, __fmemopen, fmemopen, GLIBC_2_20);
>> diff --git a/libio/oldfmemopen.c b/libio/oldfmemopen.c
>> new file mode 100644
>> index 0000000..4e85ebe
>> --- /dev/null
>> +++ b/libio/oldfmemopen.c
>> @@ -0,0 +1,265 @@
>> +/* Fmemopen implementation.
>> +   Copyright (C) 2000-2014 Free Software Foundation, Inc.
>> +   This file is part of the GNU C Library.
>> +   Contributed by Hanno Mueller, kontakt@hanno.de, 2000.
>> +
>> +   The GNU C Library is free software; you can redistribute it and/or
>> +   modify it under the terms of the GNU Lesser General Public
>> +   License as published by the Free Software Foundation; either
>> +   version 2.1 of the License, or (at your option) any later version.
>> +
>> +   The GNU C Library is distributed in the hope that it will be useful,
>> +   but WITHOUT ANY WARRANTY; without even the implied warranty of
>> +   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
>> +   Lesser General Public License for more details.
>> +
>> +   You should have received a copy of the GNU Lesser General Public
>> +   License along with the GNU C Library; if not, see
>> +   <http://www.gnu.org/licenses/>.  */
>> +
>> +/*
>> + * fmemopen() - "my" version of a string stream
>> + * Hanno Mueller, kontakt@hanno.de
>> + *
>> + *
>> + * I needed fmemopen() for an application that I currently work on,
>> + * but couldn't find it in libio. The following snippet of code is an
>> + * attempt to implement what glibc's documentation describes.
>> + *
>> + *
>> + *
>> + * I already see some potential problems:
>> + *
>> + * - I never used the "original" fmemopen(). I am sure that "my"
>> + *   fmemopen() behaves differently than the original version.
>> + *
>> + * - The documentation doesn't say wether a string stream allows
>> + *   seeks. I checked the old fmemopen implementation in glibc's stdio
>> + *   directory, wasn't quite able to see what is going on in that
>> + *   source, but as far as I understand there was no seek there. For
>> + *   my application, I needed fseek() and ftell(), so it's here.
>> + *
>> + * - "append" mode and fseek(p, SEEK_END) have two different ideas
>> + *   about the "end" of the stream.
>> + *
>> + *   As described in the documentation, when opening the file in
>> + *   "append" mode, the position pointer will be set to the first null
>> + *   character of the string buffer (yet the buffer may already
>> + *   contain more data). For fseek(), the last byte of the buffer is
>> + *   used as the end of the stream.
>> + *
>> + * - It is unclear to me what the documentation tries to say when it
>> + *   explains what happens when you use fmemopen with a NULL
>> + *   buffer.
>> + *
>> + *   Quote: "fmemopen [then] allocates an array SIZE bytes long. This
>> + *   is really only useful if you are going to write things to the
>> + *   buffer and then read them back in again."
>> + *
>> + *   What does that mean if the original fmemopen() did not allow
>> + *   seeking? How do you read what you just wrote without seeking back
>> + *   to the beginning of the stream?
>> + *
>> + * - I think there should be a second version of fmemopen() that does
>> + *   not add null characters for each write. (At least in my
>> + *   application, I am not actually using strings but binary data and
>> + *   so I don't need the stream to add null characters on its own.)
>> + */
>> +
>> +#include "libioP.h"
>> +
>> +#if SHLIB_COMPAT (libc, GLIBC_2_2, GLIBC_2_20)
>> +
>> +#include <errno.h>
>> +#include <libio.h>
>> +#include <stdio.h>
>> +#include <stdlib.h>
>> +#include <stdint.h>
>> +#include <string.h>
>> +#include <sys/types.h>
>> +
>> +
>> +typedef struct fmemopen_cookie_struct fmemopen_cookie_t;
>> +struct fmemopen_cookie_struct
>> +{
>> +  char *buffer;
>> +  int mybuffer;
>> +  int binmode;
>> +  size_t size;
>> +  _IO_off64_t pos;
>> +  size_t maxpos;
>> +};
>> +
>> +
>> +static ssize_t
>> +fmemopen_read (void *cookie, char *b, size_t s)
>> +{
>> +  fmemopen_cookie_t *c;
>> +
>> +  c = (fmemopen_cookie_t *) cookie;
>> +
>> +  if (c->pos + s > c->size)
>> +    {
>> +      if ((size_t) c->pos == c->size)
>> +	return 0;
>> +      s = c->size - c->pos;
>> +    }
>> +
>> +  memcpy (b, &(c->buffer[c->pos]), s);
>> +
>> +  c->pos += s;
>> +  if ((size_t) c->pos > c->maxpos)
>> +    c->maxpos = c->pos;
>> +
>> +  return s;
>> +}
>> +
>> +
>> +static ssize_t
>> +fmemopen_write (void *cookie, const char *b, size_t s)
>> +{
>> +  fmemopen_cookie_t *c;
>> +  int addnullc;
>> +
>> +  c = (fmemopen_cookie_t *) cookie;
>> +
>> +  addnullc = c->binmode == 0 && (s == 0 || b[s - 1] != '\0');
>> +
>> +  if (c->pos + s + addnullc > c->size)
>> +    {
>> +      if ((size_t) (c->pos + addnullc) == c->size)
>> +	{
>> +	  __set_errno (ENOSPC);
>> +	  return 0;
>> +	}
>> +      s = c->size - c->pos - addnullc;
>> +    }
>> +
>> +  memcpy (&(c->buffer[c->pos]), b, s);
>> +
>> +  c->pos += s;
>> +  if ((size_t) c->pos > c->maxpos)
>> +    {
>> +      c->maxpos = c->pos;
>> +      if (addnullc)
>> +	c->buffer[c->maxpos] = '\0';
>> +    }
>> +
>> +  return s;
>> +}
>> +
>> +
>> +static int
>> +fmemopen_seek (void *cookie, _IO_off64_t *p, int w)
>> +{
>> +  _IO_off64_t np;
>> +  fmemopen_cookie_t *c;
>> +
>> +  c = (fmemopen_cookie_t *) cookie;
>> +
>> +  switch (w)
>> +    {
>> +    case SEEK_SET:
>> +      np = *p;
>> +      break;
>> +
>> +    case SEEK_CUR:
>> +      np = c->pos + *p;
>> +      break;
>> +
>> +    case SEEK_END:
>> +      np = (c->binmode ? c->size : c->maxpos) - *p;
>> +      break;
>> +
>> +    default:
>> +      return -1;
>> +    }
>> +
>> +  if (np < 0 || (size_t) np > c->size)
>> +    return -1;
>> +
>> +  *p = c->pos = np;
>> +
>> +  return 0;
>> +}
>> +
>> +
>> +static int
>> +fmemopen_close (void *cookie)
>> +{
>> +  fmemopen_cookie_t *c;
>> +
>> +  c = (fmemopen_cookie_t *) cookie;
>> +
>> +  if (c->mybuffer)
>> +    free (c->buffer);
>> +  free (c);
>> +
>> +  return 0;
>> +}
>> +
>> +
>> +FILE *
>> +__old_fmemopen (void *buf, size_t len, const char *mode)
>> +{
>> +  cookie_io_functions_t iof;
>> +  fmemopen_cookie_t *c;
>> +
>> +  if (__glibc_unlikely (len == 0))
>> +    {
>> +    einval:
>> +      __set_errno (EINVAL);
>> +      return NULL;
>> +    }
>> +
>> +  c = (fmemopen_cookie_t *) malloc (sizeof (fmemopen_cookie_t));
>> +  if (c == NULL)
>> +    return NULL;
>> +
>> +  c->mybuffer = (buf == NULL);
>> +
>> +  if (c->mybuffer)
>> +    {
>> +      c->buffer = (char *) malloc (len);
>> +      if (c->buffer == NULL)
>> +	{
>> +	  free (c);
>> +	  return NULL;
>> +	}
>> +      c->buffer[0] = '\0';
>> +      c->maxpos = 0;
>> +    }
>> +  else
>> +    {
>> +      if (__glibc_unlikely ((uintptr_t) len > -(uintptr_t) buf))
>> +	{
>> +	  free (c);
>> +	  goto einval;
>> +	}
>> +
>> +      c->buffer = buf;
>> +
>> +      if (mode[0] == 'w')
>> +	c->buffer[0] = '\0';
>> +
>> +      c->maxpos = strnlen (c->buffer, len);
>> +    }
>> +
>> +  c->size = len;
>> +
>> +  if (mode[0] == 'a')
>> +    c->pos = c->maxpos;
>> +  else
>> +    c->pos = 0;
>> +
>> +  c->binmode = mode[0] != '\0' && mode[1] == 'b';
>> +
>> +  iof.read = fmemopen_read;
>> +  iof.write = fmemopen_write;
>> +  iof.seek = fmemopen_seek;
>> +  iof.close = fmemopen_close;
>> +
>> +  return _IO_fopencookie (c, mode, iof);
>> +}
>> +compat_symbol (libc, __old_fmemopen, fmemopen, GLIBC_2_2);
>> +#endif
>> diff --git a/stdio-common/Makefile b/stdio-common/Makefile
>> index 5f8e534..5971e65 100644
>> --- a/stdio-common/Makefile
>> +++ b/stdio-common/Makefile
>> @@ -57,7 +57,7 @@ tests := tstscanf test_rdwr test-popen tstgetln test-fseek \
>>  	 bug19 bug19a tst-popen2 scanf13 scanf14 scanf15 bug20 bug21 bug22 \
>>  	 scanf16 scanf17 tst-setvbuf1 tst-grouping bug23 bug24 \
>>  	 bug-vfprintf-nargs tst-long-dbl-fphex tst-fphex-wide tst-sprintf3 \
>> -	 bug25 tst-printf-round bug26
>> +	 bug25 tst-printf-round bug26 tst-fmemopen3
>>
>>  test-srcs = tst-unbputc tst-printf
>>
>> diff --git a/stdio-common/psiginfo.c b/stdio-common/psiginfo.c
>> index 564d237..62a9671 100644
>> --- a/stdio-common/psiginfo.c
>> +++ b/stdio-common/psiginfo.c
>> @@ -60,7 +60,7 @@ void
>>  psiginfo (const siginfo_t *pinfo, const char *s)
>>  {
>>    char buf[512];
>> -  FILE *fp = fmemopen (buf, sizeof (buf), "w");
>> +  FILE *fp = __fmemopen (buf, sizeof (buf), "w");
>>    if (fp == NULL)
>>      {
>>        const char *colon;
>> diff --git a/stdio-common/tst-fmemopen3.c b/stdio-common/tst-fmemopen3.c
>> new file mode 100644
>> index 0000000..1ff0920
>> --- /dev/null
>> +++ b/stdio-common/tst-fmemopen3.c
>> @@ -0,0 +1,206 @@
>> +/* fmemopen tests for append and read mode.
>> +   Copyright (C) 2014 Free Software Foundation, Inc.
>> +   This file is part of the GNU C Library.
>> +
>> +   The GNU C Library is free software; you can redistribute it and/or
>> +   modify it under the terms of the GNU Lesser General Public
>> +   License as published by the Free Software Foundation; either
>> +   version 2.1 of the License, or (at your option) any later version.
>> +
>> +   The GNU C Library is distributed in the hope that it will be useful,
>> +   but WITHOUT ANY WARRANTY; without even the implied warranty of
>> +   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
>> +   Lesser General Public License for more details.
>> +
>> +   You should have received a copy of the GNU Lesser General Public
>> +   License along with the GNU C Library; if not, see
>> +   <http://www.gnu.org/licenses/>.  */
>> +
>> +#include <assert.h>
>> +#include <stdio.h>
>> +#include <string.h>
>> +#include <sys/types.h>
>> +
>> +static void
>> +print_buffer (const char *s, size_t n)
>> +{
>> +  size_t i;
>> +  for (i=0; i<n; ++i)
>> +    printf ("0x%02X (%c), ", s[i], s[i]);
>> +}
>> +
>> +/* This test check append mode initial position (a/a+) based on POSIX defition
>> +   (BZ#6544 and BZ#13151).  */
>> +static int
>> +do_test_write_append (const char *mode)
>> +{
>> +  char buf[32] = "testing buffer";
>> +  char exp[32] = "testing bufferXX";
>> +
>> +  FILE *fp = fmemopen (buf, sizeof (buf), mode);
>> +
>> +  fflush (fp);
>> +  fprintf (fp, "X");
>> +  fseek (fp, 0, SEEK_SET);
>> +  fprintf (fp, "X");
>> +  fclose (fp);
>> +
>> +  if (strcmp (buf, exp) != 0)
>> +    {
>> +      printf ("%s: check failed: %s != %s\n", __FUNCTION__, buf, exp);
>> +      return 1;
>> +    }
>> +
>> +  return 0;
>> +}
>> +
>> +/* This test check append mode initial position (a/a+) based on POSIX defition
>> +   (BZ#6544 and BZ#13151) for buffer without null byte end.  */
>> +static int
>> +do_test_write_append_without_null (const char *mode)
>> +{
>> +  char buf[] = { 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55 };
>> +  char exp[] = { 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55 };
>> +
>> +  /* If '\0' is not found in buffer, POSIX states that SEEK_SET should be
>> +     the size argument.  */
>> +  FILE *fp = fmemopen (buf, sizeof (buf) - 2, "a");
>> +
>> +  fflush (fp);
>> +  fputc (0x70, fp);
>> +  fseek (fp, 0, SEEK_SET);
>> +  fputc (0x70, fp);
>> +  fputc (0x70, fp);
>> +  fclose (fp);
>> +
>> +  /* POSIX also states that a write operation on the stream shall not advance
>> +     the current buffer size beyond the size given in fmemopen, so the string
>> +     should be same.  */
>> +  if (memcmp (buf, exp, sizeof (buf)) != 0)
>> +    {
>> +      printf ("%s: check failed: ", __FUNCTION__);
>> +      print_buffer (buf, sizeof (buf));
>> +      printf ("!= ");
>> +      print_buffer (exp, sizeof (exp));
>> +      printf ("\n");
>> +      return 1;
>> +    }
>> +
>> +  return 0;
>> +}
>> +
>> +/* This test check for initial position and feek value for fmemopen objects
>> +   opened with append mode.  */
>> +static int
>> +do_test_read_append (void)
>> +{
>> +  char buf[32] = "testing buffer";
>> +  size_t buflen = strlen (buf);
>> +  long fpos;
>> +
>> +  /* POSIX defines for 'a+' the initial position is the first null byte.  */
>> +  FILE *fp = fmemopen (buf, sizeof (buf), "a+");
>> +
>> +  fpos = ftell (fp);
>> +  if (fpos != buflen)
>> +    {
>> +      printf ("%s: ftell|SEEK_SET (fp) %li != strlen (%s) %li\n",
>> +	      __FUNCTION__, fpos, buf, buflen);
>> +      fclose (fp);
>> +      return 1;
>> +    }
>> +
>> +  fseek (fp, 0, SEEK_END);
>> +
>> +  if (fpos != buflen)
>> +    {
>> +      printf ("%s: ftell|SEEK_END (fp) %li != strlen (%s) %li\n",
>> +	      __FUNCTION__, fpos, buf, buflen);
>> +      fclose (fp);
>> +      return 1;
>> +    }
>> +  fclose (fp);
>> +
>> +  /* Check if attempting to read past the current size, defined as strlen (buf)
>> +     yield an EOF.  */
>> +  fp = fmemopen (buf, sizeof (buf), "a+");
>> +  if (getc(fp) != EOF)
>> +    {
>> +      printf ("%s: getc(fp) != EOF\n", __FUNCTION__);
>> +      fclose (fp);
>> +      return -1;
>> +    }
>> +
>> +  fclose (fp);
>> +
>> +  return 0;
>> +}
>> +
>> +/* This test check for fseek (SEEK_END) using negative offsets (BZ#14292).  The
>> +   starting position of descriptor is different base on the opening mode.  */
>> +static int
>> +do_test_read_seek_neg (const char *mode, const char *expected)
>> +{
>> +  char buf[] = "abcdefghijklmnopqrstuvxz0123456789";
>> +  char tmp[10];
>> +  size_t tmps = sizeof (tmps);
>> +  long offset = -11;
>> +
>> +  FILE *fp = fmemopen (buf, sizeof (buf), mode);
>> +  fseek (fp, offset, SEEK_END);
>> +  fread (tmp, tmps, 1, fp);
>> +  
>> +  if (memcmp (tmp, expected, tmps) != 0)
>> +    {
>> +      printf ("%s: fmemopen(%s) - fseek (fp, %li, SEEK_END):\n",
>> +	      __FUNCTION__, mode, offset);
>> +      printf ("  returned: ");
>> +      print_buffer (tmp, tmps);
>> +      printf ("\n");
>> +      printf ("  expected: ");
>> +      print_buffer (expected, tmps);
>> +      printf ("\n");
>> +      return 1;
>> +    }
>> +  
>> +  fclose (fp);
>> +
>> +  return 0;
>> +}
>> +
>> +static int
>> +do_test_read_seek_negative (void)
>> +{
>> +  int ret = 0;
>> +
>> +  /* 'r' and 'w' modes defines the initial position at the buffer start and
>> +     seek with SEEK_END shall seek relative to its size give in fmemopen
>> +     call.  The expected tmp result is 0 to 9 *without* the ending null  */
>> +  ret += do_test_read_seek_neg ("r", "0123456789");
>> +  /* 'a+' mode sets the initial position at the first null byte in buffer and
>> +    SEEK_END shall seek relative to its size as well.  The expected result is
>> +    z012345678, since SEEK_END plus a+ start at '\0', not size.  */
>> +  ret += do_test_read_seek_neg ("a+", "z012345678");
>> +
>> +  return ret;
>> +}
>> +
>> +static int
>> +do_test (void)
>> +{
>> +  int ret = 0;
>> +
>> +  ret += do_test_write_append ("a");
>> +  ret += do_test_write_append_without_null ("a");
>> +  ret += do_test_write_append ("a+");
>> +  ret += do_test_write_append_without_null ("a+");
>> +
>> +  ret += do_test_read_append ();
>> +
>> +  ret += do_test_read_seek_negative ();
>> +
>> +  return ret;
>> +}
>> +
>> +#define TEST_FUNCTION do_test ()
>> +#include "../test-skeleton.c"
>> diff --git a/sysdeps/unix/sysv/linux/aarch64/libc.abilist b/sysdeps/unix/sysv/linux/aarch64/libc.abilist
>> index aeee312..6cf2ddd 100644
>> --- a/sysdeps/unix/sysv/linux/aarch64/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/aarch64/libc.abilist
>> @@ -2081,3 +2081,6 @@ GLIBC_2.18
>>   GLIBC_2.18 A
>>   __cxa_thread_atexit_impl F
>>   _mcount F
>> +GLIBC_2.20
>> + GLIBC_2.20 A
>> + fmemopen F
>> diff --git a/sysdeps/unix/sysv/linux/alpha/libc.abilist b/sysdeps/unix/sysv/linux/alpha/libc.abilist
>> index 980e088..11f03a5 100644
>> --- a/sysdeps/unix/sysv/linux/alpha/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/alpha/libc.abilist
>> @@ -1822,6 +1822,9 @@ GLIBC_2.17
>>  GLIBC_2.18
>>   GLIBC_2.18 A
>>   __cxa_thread_atexit_impl F
>> +GLIBC_2.20
>> + GLIBC_2.20 A
>> + fmemopen F
>>  GLIBC_2.2
>>   GLIBC_2.2 A
>>   _IO_adjust_wcolumn F
>> diff --git a/sysdeps/unix/sysv/linux/arm/libc.abilist b/sysdeps/unix/sysv/linux/arm/libc.abilist
>> index ce45208..0a6ef89 100644
>> --- a/sysdeps/unix/sysv/linux/arm/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/arm/libc.abilist
>> @@ -89,6 +89,9 @@ GLIBC_2.17
>>  GLIBC_2.18
>>   GLIBC_2.18 A
>>   __cxa_thread_atexit_impl F
>> +GLIBC_2.20
>> + GLIBC_2.20 A
>> + fmemopen F
>>  GLIBC_2.4
>>   GLIBC_2.4 A
>>   _Exit F
>> diff --git a/sysdeps/unix/sysv/linux/i386/libc.abilist b/sysdeps/unix/sysv/linux/i386/libc.abilist
>> index 3cb314d..af60934 100644
>> --- a/sysdeps/unix/sysv/linux/i386/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/i386/libc.abilist
>> @@ -2023,6 +2023,9 @@ GLIBC_2.2.4
>>  GLIBC_2.2.6
>>   GLIBC_2.2.6 A
>>   __nanosleep F
>> +GLIBC_2.20
>> + GLIBC_2.20 A
>> + fmemopen F
>>  GLIBC_2.3
>>   GLIBC_2.3 A
>>   __ctype_b_loc F
>> diff --git a/sysdeps/unix/sysv/linux/ia64/nptl/libc.abilist b/sysdeps/unix/sysv/linux/ia64/nptl/libc.abilist
>> index 067552d..afe6f4b 100644
>> --- a/sysdeps/unix/sysv/linux/ia64/nptl/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/ia64/nptl/libc.abilist
>> @@ -1881,6 +1881,9 @@ GLIBC_2.2.6
>>   GLIBC_2.2.6 A
>>   __nanosleep F
>>   getunwind F
>> +GLIBC_2.20
>> + GLIBC_2.20 A
>> + fmemopen F
>>  GLIBC_2.3
>>   GLIBC_2.3 A
>>   __ctype_b_loc F
>> diff --git a/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist b/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist
>> index f06cc8e..2bc1ce4 100644
>> --- a/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist
>> @@ -90,6 +90,9 @@ GLIBC_2.17
>>  GLIBC_2.18
>>   GLIBC_2.18 A
>>   __cxa_thread_atexit_impl F
>> +GLIBC_2.20
>> + GLIBC_2.20 A
>> + fmemopen F
>>  GLIBC_2.4
>>   GLIBC_2.4 A
>>   _Exit F
>> diff --git a/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist b/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist
>> index 9010ea7..48c25b4 100644
>> --- a/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist
>> @@ -1979,6 +1979,9 @@ GLIBC_2.2.4
>>  GLIBC_2.2.6
>>   GLIBC_2.2.6 A
>>   __nanosleep F
>> +GLIBC_2.20
>> + GLIBC_2.20 A
>> + fmemopen F
>>  GLIBC_2.3
>>   GLIBC_2.3 A
>>   __ctype_b_loc F
>> diff --git a/sysdeps/unix/sysv/linux/microblaze/libc.abilist b/sysdeps/unix/sysv/linux/microblaze/libc.abilist
>> index 6e8d993..8b506ed 100644
>> --- a/sysdeps/unix/sysv/linux/microblaze/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/microblaze/libc.abilist
>> @@ -2080,3 +2080,6 @@ GLIBC_2.18
>>   xencrypt F
>>   xprt_register F
>>   xprt_unregister F
>> +GLIBC_2.20
>> + GLIBC_2.20 A
>> + fmemopen F
>> diff --git a/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist
>> index 1c3490c..eb7860e 100644
>> --- a/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist
>> @@ -1951,6 +1951,9 @@ GLIBC_2.2.4
>>  GLIBC_2.2.6
>>   GLIBC_2.2.6 A
>>   __nanosleep F
>> +GLIBC_2.20
>> + GLIBC_2.20 A
>> + fmemopen F
>>  GLIBC_2.3
>>   GLIBC_2.3 A
>>   __ctype_b_loc F
>> diff --git a/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist
>> index d8fd823..e4385d2 100644
>> --- a/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist
>> @@ -1949,6 +1949,9 @@ GLIBC_2.2.4
>>  GLIBC_2.2.6
>>   GLIBC_2.2.6 A
>>   __nanosleep F
>> +GLIBC_2.20
>> + GLIBC_2.20 A
>> + fmemopen F
>>  GLIBC_2.3
>>   GLIBC_2.3 A
>>   __ctype_b_loc F
>> diff --git a/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist
>> index 3e6ed35..44b4f20 100644
>> --- a/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist
>> @@ -1947,6 +1947,9 @@ GLIBC_2.2.4
>>  GLIBC_2.2.6
>>   GLIBC_2.2.6 A
>>   __nanosleep F
>> +GLIBC_2.20
>> + GLIBC_2.20 A
>> + fmemopen F
>>  GLIBC_2.3
>>   GLIBC_2.3 A
>>   __ctype_b_loc F
>> diff --git a/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist
>> index c7e46aa..2c00ad7 100644
>> --- a/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist
>> @@ -1941,6 +1941,9 @@ GLIBC_2.2.4
>>  GLIBC_2.2.6
>>   GLIBC_2.2.6 A
>>   __nanosleep F
>> +GLIBC_2.20
>> + GLIBC_2.20 A
>> + fmemopen F
>>  GLIBC_2.3
>>   GLIBC_2.3 A
>>   __ctype_b_loc F
>> diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist
>> index f27b48b..29b9695 100644
>> --- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist
>> @@ -1983,6 +1983,9 @@ GLIBC_2.2.4
>>  GLIBC_2.2.6
>>   GLIBC_2.2.6 A
>>   __nanosleep F
>> +GLIBC_2.20
>> + GLIBC_2.20 A
>> + fmemopen F
>>  GLIBC_2.3
>>   GLIBC_2.3 A
>>   __ctype_b_loc F
>> diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist
>> index a54382e..b57f378 100644
>> --- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist
>> @@ -1989,6 +1989,9 @@ GLIBC_2.2.4
>>  GLIBC_2.2.6
>>   GLIBC_2.2.6 A
>>   __nanosleep F
>> +GLIBC_2.20
>> + GLIBC_2.20 A
>> + fmemopen F
>>  GLIBC_2.3
>>   GLIBC_2.3 A
>>   __ctype_b_loc F
>> diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist
>> index 195b587..7a1deff 100644
>> --- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist
>> @@ -90,6 +90,9 @@ GLIBC_2.17
>>  GLIBC_2.18
>>   GLIBC_2.18 A
>>   __cxa_thread_atexit_impl F
>> +GLIBC_2.20
>> + GLIBC_2.20 A
>> + fmemopen F
>>  GLIBC_2.3
>>   GLIBC_2.3 A
>>   _Exit F
>> diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist b/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist
>> index 03f2e83..d23377d 100644
>> --- a/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist
>> @@ -1985,6 +1985,9 @@ GLIBC_2.2.4
>>  GLIBC_2.2.6
>>   GLIBC_2.2.6 A
>>   __nanosleep F
>> +GLIBC_2.20
>> + GLIBC_2.20 A
>> + fmemopen F
>>  GLIBC_2.3
>>   GLIBC_2.3 A
>>   __ctype_b_loc F
>> diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist b/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist
>> index 4576fc8..7a4081e 100644
>> --- a/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist
>> @@ -1881,6 +1881,9 @@ GLIBC_2.2.4
>>  GLIBC_2.2.6
>>   GLIBC_2.2.6 A
>>   __nanosleep F
>> +GLIBC_2.20
>> + GLIBC_2.20 A
>> + fmemopen F
>>  GLIBC_2.3
>>   GLIBC_2.3 A
>>   __ctype_b_loc F
>> diff --git a/sysdeps/unix/sysv/linux/sh/libc.abilist b/sysdeps/unix/sysv/linux/sh/libc.abilist
>> index a653292..51f8707 100644
>> --- a/sysdeps/unix/sysv/linux/sh/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/sh/libc.abilist
>> @@ -1864,6 +1864,9 @@ GLIBC_2.2.4
>>  GLIBC_2.2.6
>>   GLIBC_2.2.6 A
>>   __nanosleep F
>> +GLIBC_2.20
>> + GLIBC_2.20 A
>> + fmemopen F
>>  GLIBC_2.3
>>   GLIBC_2.3 A
>>   __ctype_b_loc F
>> diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist b/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist
>> index 9defbdf..46490a7 100644
>> --- a/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist
>> @@ -1975,6 +1975,9 @@ GLIBC_2.2.4
>>  GLIBC_2.2.6
>>   GLIBC_2.2.6 A
>>   __nanosleep F
>> +GLIBC_2.20
>> + GLIBC_2.20 A
>> + fmemopen F
>>  GLIBC_2.3
>>   GLIBC_2.3 A
>>   __ctype_b_loc F
>> diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist b/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist
>> index 35987fa..540bc1c 100644
>> --- a/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist
>> @@ -1908,6 +1908,9 @@ GLIBC_2.2.4
>>  GLIBC_2.2.6
>>   GLIBC_2.2.6 A
>>   __nanosleep F
>> +GLIBC_2.20
>> + GLIBC_2.20 A
>> + fmemopen F
>>  GLIBC_2.3
>>   GLIBC_2.3 A
>>   __ctype_b_loc F
>> diff --git a/sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libc.abilist b/sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libc.abilist
>> index caf74b8..a473437 100644
>> --- a/sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libc.abilist
>> @@ -2091,3 +2091,6 @@ GLIBC_2.17
>>  GLIBC_2.18
>>   GLIBC_2.18 A
>>   __cxa_thread_atexit_impl F
>> +GLIBC_2.20
>> + GLIBC_2.20 A
>> + fmemopen F
>> diff --git a/sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libc.abilist b/sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libc.abilist
>> index 68d975b..16bd028 100644
>> --- a/sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libc.abilist
>> @@ -2091,3 +2091,6 @@ GLIBC_2.17
>>  GLIBC_2.18
>>   GLIBC_2.18 A
>>   __cxa_thread_atexit_impl F
>> +GLIBC_2.20
>> + GLIBC_2.20 A
>> + fmemopen F
>> diff --git a/sysdeps/unix/sysv/linux/tile/tilepro/libc.abilist b/sysdeps/unix/sysv/linux/tile/tilepro/libc.abilist
>> index caf74b8..a473437 100644
>> --- a/sysdeps/unix/sysv/linux/tile/tilepro/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/tile/tilepro/libc.abilist
>> @@ -2091,3 +2091,6 @@ GLIBC_2.17
>>  GLIBC_2.18
>>   GLIBC_2.18 A
>>   __cxa_thread_atexit_impl F
>> +GLIBC_2.20
>> + GLIBC_2.20 A
>> + fmemopen F
>> diff --git a/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist b/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist
>> index 914b590..b77feba 100644
>> --- a/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist
>> @@ -1854,6 +1854,9 @@ GLIBC_2.2.5
>>  GLIBC_2.2.6
>>   GLIBC_2.2.6 A
>>   __nanosleep F
>> +GLIBC_2.20
>> + GLIBC_2.20 A
>> + fmemopen F
>>  GLIBC_2.3
>>   GLIBC_2.3 A
>>   __ctype_b_loc F
>> diff --git a/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist b/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist
>> index 0f64c8d..f638884 100644
>> --- a/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist
>> @@ -2089,3 +2089,6 @@ GLIBC_2.17
>>  GLIBC_2.18
>>   GLIBC_2.18 A
>>   __cxa_thread_atexit_impl F
>> +GLIBC_2.20
>> + GLIBC_2.20 A
>> + fmemopen F
>>
>>
>


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