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f3dcdfe1ce
stdin/stdout/stderr streams if it's part of the thread-safe library. - fpathconf() now checks if the file descriptor is really referring to a file. - The termios hook entry code could file descriptor's embedded file handle rather than what the thread safe library had dynamically bound to the stdin/stdout/stderr streams. git-svn-id: file:///Users/olsen/Code/migration-svn-zu-git/logical-line-staging/clib2/trunk@15130 87f5fb63-7c3d-0410-a384-fd976d0f7a62
133 lines
3.4 KiB
C
133 lines
3.4 KiB
C
/*
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* $Id: fcntl_get_default_file.c,v 1.6 2006-09-12 14:16:44 obarthel Exp $
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*
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* :ts=4
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*
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* Portable ISO 'C' (1994) runtime library for the Amiga computer
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* Copyright (c) 2002-2006 by Olaf Barthel <olsen (at) sourcery.han.de>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Neither the name of Olaf Barthel nor the names of contributors
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* may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _FCNTL_HEADERS_H
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#include "fcntl_headers.h"
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#endif /* _FCNTL_HEADERS_H */
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/****************************************************************************/
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/* The following is not part of the ISO 'C' (1994) standard. */
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/****************************************************************************/
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int
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__get_default_file(int file_descriptor,long * file_ptr)
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{
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int result = ERROR;
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struct fd * fd;
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BPTR file;
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assert( file_descriptor >= 0 && file_descriptor < __num_fd );
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assert( __fd[file_descriptor] != NULL );
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assert( FLAG_IS_SET(__fd[file_descriptor]->fd_Flags,FDF_IN_USE) );
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assert( file_ptr != NULL );
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fd = __get_file_descriptor(file_descriptor);
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if(fd == NULL)
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{
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__set_errno(EBADF);
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goto out;
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}
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__fd_unlock(fd);
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#if defined(__THREAD_SAFE)
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{
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/* Check if this file should be dynamically bound to one of the
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three standard I/O streams. */
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if(FLAG_IS_SET(fd->fd_Flags,FDF_STDIO))
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{
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switch(fd->fd_DefaultFile)
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{
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case STDIN_FILENO:
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file = Input();
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break;
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case STDOUT_FILENO:
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file = Output();
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break;
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case STDERR_FILENO:
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#if defined(__amigaos4__)
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{
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file = ErrorOutput();
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}
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#else
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{
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struct Process * this_process = (struct Process *)FindTask(NULL);
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file = this_process->pr_CES;
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}
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#endif /* __amigaos4__ */
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/* The following is rather controversial; if the standard error stream
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is unavailable, we default to reuse the standard output stream. This
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is problematic if the standard output stream was redirected and should
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not be the same as the standard error output stream. */
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if(file == ZERO)
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file = Output();
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break;
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default:
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file = ZERO;
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break;
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}
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}
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else
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{
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file = fd->fd_DefaultFile;
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}
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}
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#else
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{
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file = fd->fd_DefaultFile;
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}
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#endif /* __THREAD_SAFE */
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(*file_ptr) = (long)file;
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result = 0;
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out:
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__fd_unlock(fd);
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return(result);
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}
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