88 lines
2.9 KiB
C
88 lines
2.9 KiB
C
/* Copyright (C) 1993,95,96,97,98,2000,2001,2002,2003,2008
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Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA.
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As a special exception, if you link the code in this file with
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files compiled with a GNU compiler to produce an executable,
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that does not cause the resulting executable to be covered by
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the GNU Lesser General Public License. This exception does not
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however invalidate any other reasons why the executable file
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might be covered by the GNU Lesser General Public License.
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This exception applies to code released by its copyright holders
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in files containing the exception. */
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#include "libioP.h"
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#include "stdio.h"
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#include <stdlib.h>
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#include <shlib-compat.h>
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#include <fd_to_filename.h>
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FILE*
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freopen (filename, mode, fp)
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const char* filename;
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const char* mode;
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FILE* fp;
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{
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FILE *result;
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int fd = -1;
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CHECK_FILE (fp, NULL);
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if (!(fp->_flags & _IO_IS_FILEBUF))
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return NULL;
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_IO_acquire_lock (fp);
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if (filename == NULL && _IO_fileno (fp) >= 0)
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{
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fd = __dup (_IO_fileno (fp));
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if (fd != -1)
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filename = fd_to_filename (fd);
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}
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#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
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if (&_IO_stdin_used == NULL)
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{
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/* If the shared C library is used by the application binary which
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was linked against the older version of libio, we just use the
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older one even for internal use to avoid trouble since a pointer
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to the old libio may be passed into shared C library and wind
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up here. */
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_IO_old_file_close_it (fp);
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_IO_JUMPS ((struct _IO_FILE_plus *) fp) = &_IO_old_file_jumps;
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result = _IO_old_file_fopen (fp, filename, mode);
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}
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else
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#endif
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{
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INTUSE(_IO_file_close_it) (fp);
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_IO_JUMPS ((struct _IO_FILE_plus *) fp) = &_IO_file_jumps;
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if (_IO_vtable_offset (fp) == 0 && fp->_wide_data != NULL)
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fp->_wide_data->_wide_vtable = &_IO_wfile_jumps;
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result = INTUSE(_IO_file_fopen) (fp, filename, mode, 1);
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if (result != NULL)
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result = __fopen_maybe_mmap (result);
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}
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if (result != NULL)
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/* unbound stream orientation */
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result->_mode = 0;
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if (fd != -1)
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{
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__close (fd);
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free ((char *) filename);
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}
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_IO_release_lock (fp);
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return result;
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}
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