mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-14 01:00:07 +00:00
3a90addad1
in iofdopen.c. * libio/oldiofopen.c (_IO_old_fopen): Bring over recent changes in iofopen.c. * libio/oldiofclose.c (_IO_old_fclose): Bring over recent changes in iofclose.c. * libio/oldfileops.c (_IO_old_file_underflow, _IO_old_file_sync, _IO_old_file_seekoff): Bring over recent changes in fileops.c.
136 lines
3.9 KiB
C
136 lines
3.9 KiB
C
/* Copyright (C) 1993, 1994, 1997, 1999 Free Software Foundation, Inc.
|
|
This file is part of the GNU IO Library.
|
|
|
|
This library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU General Public License as
|
|
published by the Free Software Foundation; either version 2, or (at
|
|
your option) any later version.
|
|
|
|
This library is distributed in the hope that it will be useful, but
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this library; see the file COPYING. If not, write to
|
|
the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
|
|
MA 02111-1307, USA.
|
|
|
|
As a special exception, if you link this library with files
|
|
compiled with a GNU compiler to produce an executable, this does
|
|
not cause the resulting executable to be covered by the GNU General
|
|
Public License. This exception does not however invalidate any
|
|
other reasons why the executable file might be covered by the GNU
|
|
General Public License. */
|
|
|
|
#define _IO_USE_OLD_IO_FILE
|
|
#ifdef __STDC__
|
|
# include <stdlib.h>
|
|
#endif
|
|
#include "libioP.h"
|
|
#include <fcntl.h>
|
|
|
|
#ifndef _IO_fcntl
|
|
# define _IO_fcntl __fcntl
|
|
#endif
|
|
|
|
_IO_FILE *
|
|
_IO_old_fdopen (fd, mode)
|
|
int fd;
|
|
const char *mode;
|
|
{
|
|
int read_write;
|
|
int posix_mode = 0;
|
|
struct locked_FILE
|
|
{
|
|
struct _IO_FILE_plus fp;
|
|
#ifdef _IO_MTSAFE_IO
|
|
_IO_lock_t lock;
|
|
#endif
|
|
} *new_f;
|
|
int fd_flags;
|
|
|
|
switch (*mode++)
|
|
{
|
|
case 'r':
|
|
read_write = _IO_NO_WRITES;
|
|
break;
|
|
case 'w':
|
|
read_write = _IO_NO_READS;
|
|
break;
|
|
case 'a':
|
|
posix_mode = O_APPEND;
|
|
read_write = _IO_NO_READS|_IO_IS_APPENDING;
|
|
break;
|
|
default:
|
|
MAYBE_SET_EINVAL;
|
|
return NULL;
|
|
}
|
|
if (mode[0] == '+' || (mode[0] == 'b' && mode[1] == '+'))
|
|
read_write &= _IO_IS_APPENDING;
|
|
#ifdef F_GETFL
|
|
fd_flags = _IO_fcntl (fd, F_GETFL);
|
|
#ifndef O_ACCMODE
|
|
#define O_ACCMODE (O_RDONLY|O_WRONLY|O_RDWR)
|
|
#endif
|
|
if (fd_flags == -1
|
|
|| ((fd_flags & O_ACCMODE) == O_RDONLY && !(read_write & _IO_NO_WRITES))
|
|
|| ((fd_flags & O_ACCMODE) == O_WRONLY && !(read_write & _IO_NO_READS)))
|
|
return NULL;
|
|
|
|
/* The May 93 draft of P1003.4/D14.1 (redesignated as 1003.1b)
|
|
[System Application Program Interface (API) Amendment 1:
|
|
Realtime Extensions], Rationale B.8.3.3
|
|
Open a Stream on a File Descriptor says:
|
|
|
|
Although not explicitly required by POSIX.1, a good
|
|
implementation of append ("a") mode would cause the
|
|
O_APPEND flag to be set.
|
|
|
|
(Historical implementations [such as Solaris2] do a one-time
|
|
seek in fdopen.)
|
|
|
|
However, we do not turn O_APPEND off if the mode is "w" (even
|
|
though that would seem consistent) because that would be more
|
|
likely to break historical programs.
|
|
*/
|
|
if ((posix_mode & O_APPEND) && !(fd_flags & O_APPEND))
|
|
{
|
|
#ifdef F_SETFL
|
|
if (_IO_fcntl (fd, F_SETFL, fd_flags | O_APPEND) == -1)
|
|
#endif
|
|
return NULL;
|
|
}
|
|
#endif
|
|
|
|
new_f = (struct locked_FILE *) malloc (sizeof (struct locked_FILE));
|
|
if (new_f == NULL)
|
|
return NULL;
|
|
#ifdef _IO_MTSAFE_IO
|
|
new_f->fp.file._lock = &new_f->lock;
|
|
#endif
|
|
_IO_init (&new_f->fp.file, 0);
|
|
_IO_JUMPS (&new_f->fp) = &_IO_old_file_jumps;
|
|
_IO_old_file_init (&new_f->fp.file);
|
|
#if !_IO_UNIFIED_JUMPTABLES
|
|
new_f->fp.vtable = NULL;
|
|
#endif
|
|
if (_IO_old_file_attach (&new_f->fp.file, fd) == NULL)
|
|
{
|
|
_IO_un_link (&new_f->fp.file);
|
|
free (new_f);
|
|
return NULL;
|
|
}
|
|
new_f->fp.file._flags &= ~_IO_DELETE_DONT_CLOSE;
|
|
|
|
new_f->fp.file._IO_file_flags =
|
|
_IO_mask_flags (&new_f->fp.file, read_write,
|
|
_IO_NO_READS+_IO_NO_WRITES+_IO_IS_APPENDING);
|
|
|
|
return &new_f->fp.file;
|
|
}
|
|
|
|
strong_alias (_IO_old_fdopen, __old_fdopen)
|
|
symbol_version (_IO_old_fdopen, _IO_fdopen, GLIBC_2.0);
|
|
symbol_version (__old_fdopen, fdopen, GLIBC_2.0);
|