1 /* Copyright (C) 1993,1994,1997,1998,1999,2000,2002,2003,2010,2012
2 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>.
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. */
33 # include <shlib-compat.h>
38 #define _IO_fcntl __fcntl
40 #define _IO_fcntl fcntl
45 _IO_new_fdopen (fd, mode)
53 struct _IO_FILE_plus fp;
57 struct _IO_wide_data wd;
66 read_write = _IO_NO_WRITES;
69 read_write = _IO_NO_READS;
72 posix_mode = O_APPEND;
73 read_write = _IO_NO_READS|_IO_IS_APPENDING;
79 for (i = 1; i < 5; ++i)
86 read_write &= _IO_IS_APPENDING;
100 fd_flags = _IO_fcntl (fd, F_GETFL);
102 #define O_ACCMODE (O_RDONLY|O_WRONLY|O_RDWR)
107 if (((fd_flags & O_ACCMODE) == O_RDONLY && !(read_write & _IO_NO_WRITES))
108 || ((fd_flags & O_ACCMODE) == O_WRONLY && !(read_write & _IO_NO_READS)))
114 /* The May 93 draft of P1003.4/D14.1 (redesignated as 1003.1b)
115 [System Application Program Interface (API) Amendment 1:
116 Realtime Extensions], Rationale B.8.3.3
117 Open a Stream on a File Descriptor says:
119 Although not explicitly required by POSIX.1, a good
120 implementation of append ("a") mode would cause the
121 O_APPEND flag to be set.
123 (Historical implementations [such as Solaris2] do a one-time
126 However, we do not turn O_APPEND off if the mode is "w" (even
127 though that would seem consistent) because that would be more
128 likely to break historical programs.
130 if ((posix_mode & O_APPEND) && !(fd_flags & O_APPEND))
133 if (_IO_fcntl (fd, F_SETFL, fd_flags | O_APPEND) == -1)
139 new_f = (struct locked_FILE *) malloc (sizeof (struct locked_FILE));
143 new_f->fp.file._lock = &new_f->lock;
145 /* Set up initially to use the `maybe_mmap' jump tables rather than using
146 __fopen_maybe_mmap to do it, because we need them in place before we
147 call _IO_file_attach or else it will allocate a buffer immediately. */
148 _IO_no_init (&new_f->fp.file, 0, 0, &new_f->wd,
150 (use_mmap && (read_write & _IO_NO_WRITES))
151 ? &_IO_wfile_jumps_maybe_mmap :
154 _IO_JUMPS (&new_f->fp) =
156 (use_mmap && (read_write & _IO_NO_WRITES)) ? &_IO_file_jumps_maybe_mmap :
159 INTUSE(_IO_file_init) (&new_f->fp);
160 #if !_IO_UNIFIED_JUMPTABLES
161 new_f->fp.vtable = NULL;
163 if (INTUSE(_IO_file_attach) ((_IO_FILE *) &new_f->fp, fd) == NULL)
165 INTUSE(_IO_setb) (&new_f->fp.file, NULL, NULL, 0);
166 INTUSE(_IO_un_link) (&new_f->fp);
170 new_f->fp.file._flags &= ~_IO_DELETE_DONT_CLOSE;
172 _IO_mask_flags (&new_f->fp.file, read_write,
173 _IO_NO_READS+_IO_NO_WRITES+_IO_IS_APPENDING);
175 return &new_f->fp.file;
177 INTDEF2(_IO_new_fdopen, _IO_fdopen)
179 strong_alias (_IO_new_fdopen, __new_fdopen)
180 versioned_symbol (libc, _IO_new_fdopen, _IO_fdopen, GLIBC_2_1);
181 versioned_symbol (libc, __new_fdopen, fdopen, GLIBC_2_1);