libio/iofclose.c

   1 /* Copyright (C) 1993,1995,1997-2004,2005 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, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.
  18
  19    As a special exception, if you link the code in this file with
  20    files compiled with a GNU compiler to produce an executable,
  21    that does not cause the resulting executable to be covered by
  22    the GNU Lesser General Public License.  This exception does not
  23    however invalidate any other reasons why the executable file
  24    might be covered by the GNU Lesser General Public License.
  25    This exception applies to code released by its copyright holders
  26    in files containing the exception.  */
  27
  28 #include "libioP.h"
  29 #ifdef __STDC__
  30 #include <stdlib.h>
  31 #endif
  32 #if _LIBC
  33 # include "../iconv/gconv_int.h"
  34 # include <shlib-compat.h>
  35 #else
  36 # define SHLIB_COMPAT(a, b, c) 0
  37 # define _IO_new_fclose fclose
  38 #endif
  39
  40 int
  41 _IO_new_fclose (fp)
  42      _IO_FILE *fp;
  43 {
  44   int status;
  45
  46   CHECK_FILE(fp, EOF);
  47
  48 #if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
  49   /* We desperately try to help programs which are using streams in a
  50      strange way and mix old and new functions.  Detect old streams
  51      here.  */
  52   if (_IO_vtable_offset (fp) != 0)
  53     return _IO_old_fclose (fp);
  54 #endif
  55
  56   /* First unlink the stream.  */
  57   if (fp->_IO_file_flags & _IO_IS_FILEBUF)
  58     INTUSE(_IO_un_link) ((struct _IO_FILE_plus *) fp);
  59
  60   _IO_acquire_lock (fp);
  61   if (fp->_IO_file_flags & _IO_IS_FILEBUF)
  62     status = INTUSE(_IO_file_close_it) (fp);
  63   else
  64     status = fp->_flags & _IO_ERR_SEEN ? -1 : 0;
  65   _IO_release_lock (fp);
  66   _IO_FINISH (fp);
  67   if (fp->_mode > 0)
  68     {
  69 #if _LIBC
  70       /* This stream has a wide orientation.  This means we have to free
  71          the conversion functions.  */
  72       struct _IO_codecvt *cc = fp->_codecvt;
  73
  74       __libc_lock_lock (__gconv_lock);
  75       __gconv_release_step (cc->__cd_in.__cd.__steps);
  76       __gconv_release_step (cc->__cd_out.__cd.__steps);
  77       __libc_lock_unlock (__gconv_lock);
  78 #endif
  79     }
  80   else
  81     {
  82       if (_IO_have_backup (fp))
  83         INTUSE(_IO_free_backup_area) (fp);
  84     }
  85   if (fp != _IO_stdin && fp != _IO_stdout && fp != _IO_stderr)
  86     {
  87       fp->_IO_file_flags = 0;
  88       free(fp);
  89     }
  90
  91   return status;
  92 }
  93
  94 #ifdef _LIBC
  95 versioned_symbol (libc, _IO_new_fclose, _IO_fclose, GLIBC_2_1);
  96 strong_alias (_IO_new_fclose, __new_fclose)
  97 versioned_symbol (libc, __new_fclose, fclose, GLIBC_2_1);
  98 #endif