1 /* Copyright (C) 1993-2016 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
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.
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.
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 <http://www.gnu.org/licenses/>.
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. */
32 # include <shlib-compat.h>
34 # define _IO_new_fopen fopen
38 __fopen_maybe_mmap (_IO_FILE
*fp
)
41 if ((fp
->_flags2
& _IO_FLAGS2_MMAP
) && (fp
->_flags
& _IO_NO_WRITES
))
43 /* Since this is read-only, we might be able to mmap the contents
44 directly. We delay the decision until the first read attempt by
45 giving it a jump table containing functions that choose mmap or
46 vanilla file operations and reset the jump table accordingly. */
49 _IO_JUMPS_FILE_plus (fp
) = &_IO_file_jumps_maybe_mmap
;
51 _IO_JUMPS_FILE_plus (fp
) = &_IO_wfile_jumps_maybe_mmap
;
52 fp
->_wide_data
->_wide_vtable
= &_IO_wfile_jumps_maybe_mmap
;
60 __fopen_internal (const char *filename
, const char *mode
, int is32
)
64 struct _IO_FILE_plus fp
;
68 struct _IO_wide_data wd
;
69 } *new_f
= (struct locked_FILE
*) malloc (sizeof (struct locked_FILE
));
74 new_f
->fp
.file
._lock
= &new_f
->lock
;
76 #if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
77 _IO_no_init (&new_f
->fp
.file
, 0, 0, &new_f
->wd
, &_IO_wfile_jumps
);
79 _IO_no_init (&new_f
->fp
.file
, 1, 0, NULL
, NULL
);
81 _IO_JUMPS (&new_f
->fp
) = &_IO_file_jumps
;
82 _IO_file_init (&new_f
->fp
);
83 #if !_IO_UNIFIED_JUMPTABLES
84 new_f
->fp
.vtable
= NULL
;
86 if (_IO_file_fopen ((_IO_FILE
*) new_f
, filename
, mode
, is32
) != NULL
)
87 return __fopen_maybe_mmap (&new_f
->fp
.file
);
89 _IO_un_link (&new_f
->fp
);
95 _IO_new_fopen (const char *filename
, const char *mode
)
97 return __fopen_internal (filename
, mode
, 1);
101 strong_alias (_IO_new_fopen
, __new_fopen
)
102 versioned_symbol (libc
, _IO_new_fopen
, _IO_fopen
, GLIBC_2_1
);
103 versioned_symbol (libc
, __new_fopen
, fopen
, GLIBC_2_1
);
105 # if !defined O_LARGEFILE || O_LARGEFILE == 0
106 weak_alias (_IO_new_fopen
, _IO_fopen64
)
107 weak_alias (_IO_new_fopen
, fopen64
)