1  /* Copyright (C) 1993-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       9     The GNU C Library is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library; if not, see
      16     <https://www.gnu.org/licenses/>.
      17  
      18     As a special exception, if you link the code in this file with
      19     files compiled with a GNU compiler to produce an executable,
      20     that does not cause the resulting executable to be covered by
      21     the GNU Lesser General Public License.  This exception does not
      22     however invalidate any other reasons why the executable file
      23     might be covered by the GNU Lesser General Public License.
      24     This exception applies to code released by its copyright holders
      25     in files containing the exception.  */
      26  
      27  #include <shlib-compat.h>
      28  #if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
      29  
      30  #define _IO_USE_OLD_IO_FILE
      31  #include "libioP.h"
      32  #include <stdlib.h>
      33  
      34  
      35  FILE *
      36  attribute_compat_text_section
      37  _IO_old_fopen (const char *filename, const char *mode)
      38  {
      39    struct locked_FILE
      40    {
      41      struct _IO_FILE_complete_plus fp;
      42  #ifdef _IO_MTSAFE_IO
      43      _IO_lock_t lock;
      44  #endif
      45    } *new_f = (struct locked_FILE *) malloc (sizeof (struct locked_FILE));
      46  
      47    if (new_f == NULL)
      48      return NULL;
      49  #ifdef _IO_MTSAFE_IO
      50    new_f->fp.file._file._lock = &new_f->lock;
      51  #endif
      52    _IO_old_init (&new_f->fp.file._file, 0);
      53    _IO_JUMPS_FILE_plus (&new_f->fp) = &_IO_old_file_jumps;
      54    _IO_old_file_init_internal ((struct _IO_FILE_plus *) &new_f->fp);
      55    if (_IO_old_file_fopen ((FILE *) &new_f->fp, filename, mode) != NULL)
      56      return (FILE *) &new_f->fp;
      57    _IO_un_link ((struct _IO_FILE_plus *) &new_f->fp);
      58    free (new_f);
      59    return NULL;
      60  }
      61  
      62  strong_alias (_IO_old_fopen, __old_fopen)
      63  compat_symbol (libc, _IO_old_fopen, _IO_fopen, GLIBC_2_0);
      64  compat_symbol (libc, __old_fopen, fopen, GLIBC_2_0);
      65  #endif