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Diffstat (limited to 'contrib/libg++/libio/iofdopen.c')
-rw-r--r-- | contrib/libg++/libio/iofdopen.c | 121 |
1 files changed, 0 insertions, 121 deletions
diff --git a/contrib/libg++/libio/iofdopen.c b/contrib/libg++/libio/iofdopen.c deleted file mode 100644 index f8bc76869ad9f..0000000000000 --- a/contrib/libg++/libio/iofdopen.c +++ /dev/null @@ -1,121 +0,0 @@ -/* -Copyright (C) 1993, 1994 Free Software Foundation - -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. */ - -#ifdef __STDC__ -#include <stdlib.h> -#endif -#include "libioP.h" -#include <fcntl.h> - -#ifndef _IO_fcntl -#define _IO_fcntl fcntl -#endif - -_IO_FILE * -DEFUN(_IO_fdopen, (fd, mode), - int fd AND const char *mode) -{ - int read_write; - int posix_mode = 0; - struct _IO_FILE_plus *fp; - 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: -#ifdef EINVAL - errno = EINVAL; -#endif - 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 - - fp = (struct _IO_FILE_plus*)malloc(sizeof(struct _IO_FILE_plus)); - if (fp == NULL) - return NULL; - _IO_init(&fp->file, 0); - _IO_JUMPS(&fp->file) = &_IO_file_jumps; - _IO_file_init(&fp->file); -#if !_IO_UNIFIED_JUMPTABLES - fp->vtable = NULL; -#endif - if (_IO_file_attach(&fp->file, fd) == NULL) - { - _IO_un_link(&fp->file); - free (fp); - return NULL; - } - fp->file._flags &= ~_IO_DELETE_DONT_CLOSE; - - fp->file._IO_file_flags = - _IO_mask_flags(&fp->file, read_write, - _IO_NO_READS+_IO_NO_WRITES+_IO_IS_APPENDING); - - return (_IO_FILE*)fp; -} |