1/* Copyright (C) 1993,95,96,97,98,2000,2001,2002 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#include "stdio.h"
30
31#include <shlib-compat.h>
32
33FILE*
34freopen (filename, mode, fp)
35     const char* filename;
36     const char* mode;
37     FILE* fp;
38{
39  FILE *result;
40  CHECK_FILE (fp, NULL);
41  if (!(fp->_flags & _IO_IS_FILEBUF))
42    return NULL;
43  _IO_cleanup_region_start ((void (*) __P ((void *))) _IO_funlockfile, fp);
44  _IO_flockfile (fp);
45#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
46  if (&_IO_stdin_used == NULL)
47    /* If the shared C library is used by the application binary which
48       was linked against the older version of libio, we just use the
49       older one even for internal use to avoid trouble since a pointer
50       to the old libio may be passed into shared C library and wind
51       up here. */
52    result = _IO_old_freopen (filename, mode, fp);
53  else
54#endif
55    result = _IO_freopen (filename, mode, fp);
56  if (result != NULL)
57    /* unbound stream orientation */
58    result->_mode = 0;
59  _IO_funlockfile (fp);
60  _IO_cleanup_region_end (0);
61  return result;
62}
63
64#if 0
65#include <fd_to_filename.h>
66
67FILE*
68freopen (filename, mode, fp)
69     const char* filename;
70     const char* mode;
71     FILE* fp;
72{
73  FILE *result;
74  int fd = -1;
75  CHECK_FILE (fp, NULL);
76  if (!(fp->_flags & _IO_IS_FILEBUF))
77    return NULL;
78  _IO_cleanup_region_start ((void (*) __P ((void *))) _IO_funlockfile, fp);
79  _IO_flockfile (fp);
80  if (filename == NULL && _IO_fileno (fp) >= 0)
81    {
82      fd = __dup (_IO_fileno (fp));
83      if (fd != -1)
84	filename = fd_to_filename (fd);
85    }
86#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
87  if (&_IO_stdin_used == NULL)
88    {
89      /* If the shared C library is used by the application binary which
90	 was linked against the older version of libio, we just use the
91	 older one even for internal use to avoid trouble since a pointer
92	 to the old libio may be passed into shared C library and wind
93	 up here. */
94      _IO_old_file_close_it (fp);
95      _IO_JUMPS ((struct _IO_FILE_plus *) fp) = &_IO_old_file_jumps;
96      result = _IO_old_file_fopen (fp, filename, mode);
97    }
98  else
99#endif
100    {
101      INTUSE(_IO_file_close_it) (fp);
102      _IO_JUMPS ((struct _IO_FILE_plus *) fp) = &INTUSE(_IO_file_jumps);
103//      if (fp->_vtable_offset == 0 && fp->_wide_data != NULL)
104//	fp->_wide_data->_wide_vtable = &INTUSE(_IO_wfile_jumps);
105      result = INTUSE(_IO_file_fopen) (fp, filename, mode, 1);
106      if (result != NULL)
107	result = __fopen_maybe_mmap (result);
108    }
109  if (result != NULL)
110    /* unbound stream orientation */
111    result->_mode = 0;
112  if (fd != -1)
113    {
114      __close (fd);
115      if (filename != NULL)
116	free ((char *) filename);
117    }
118  _IO_funlockfile (fp);
119  _IO_cleanup_region_end (0);
120  return result;
121}
122#endif
123