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2310605f10
git-svn-id: file:///Users/olsen/Code/migration-svn-zu-git/logical-line-staging/clib2/trunk@15306 87f5fb63-7c3d-0410-a384-fd976d0f7a62
147 lines
3.7 KiB
C
147 lines
3.7 KiB
C
/*
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* $Id: termios_tcflush.c,v 1.5 2006-11-16 14:39:23 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) 2002-2015 by Olaf Barthel <obarthel (at) gmx.net>
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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 _TERMIOS_HEADERS_H
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#include "termios_headers.h"
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#endif /* _TERMIOS_HEADERS_H */
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/****************************************************************************/
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/*
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* This is a bit messy and might possibly be done in a better way, but console
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* termios support is a bit of a hack at best.
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* tcflush() could possibly be implemented with using CMD_CLEAR with the
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* console.device, but this would be just as messy and possibly break
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* even more if e.g. stdin is a pipe.
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*/
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int
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tcflush(int file_descriptor,int queue)
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{
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int result = ERROR;
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struct fd *fd;
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ENTER();
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SHOWVALUE(file_descriptor);
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if(__check_abort_enabled)
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__check_abort();
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__stdio_lock();
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fd = __get_file_descriptor(file_descriptor);
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if(fd == NULL || FLAG_IS_CLEAR(fd->fd_Flags,FDF_TERMIOS))
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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_lock(fd);
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if(queue < TCIFLUSH || queue > TCIOFLUSH)
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{
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SHOWMSG("Invalid queue specified to tcflush().");
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__set_errno(EINVAL);
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goto out;
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}
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if(queue == TCIFLUSH || queue == TCIOFLUSH)
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{
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LONG num_bytes_read;
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char buf[64];
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struct termios *tios;
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BPTR file;
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tios = fd->fd_Aux;
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file = __resolve_fd_file(fd);
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if(file == ZERO)
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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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/* Set raw mode so we can read without blocking. */
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if(FLAG_IS_SET(tios->c_lflag,ICANON))
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{
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SetMode(file,DOSTRUE);
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SET_FLAG(fd->fd_Flags,FDF_NON_BLOCKING);
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}
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while(WaitForChar(file,1) != DOSFALSE)
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{
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if(__check_abort_enabled && FLAG_IS_SET(SetSignal(0,0),__break_signal_mask))
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break;
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/* Read away available data. (upto 8k) */
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num_bytes_read = Read(file,buf,64);
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if(num_bytes_read == ERROR || num_bytes_read == 0)
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break;
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}
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/* Restore the Raw/Cooked mode. */
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if(FLAG_IS_SET(tios->c_lflag,ICANON))
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{
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SetMode(file,DOSFALSE); /* Set Cooked = Canonical mode. */
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CLEAR_FLAG(fd->fd_Flags,FDF_NON_BLOCKING);
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}
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result = OK;
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}
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else if (queue == TCOFLUSH || queue == TCIOFLUSH)
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{
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/* TODO: Can we actually discard data buffered on the file?
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* For now we do the same as tcdrain().
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*/
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result = tcdrain(file_descriptor);
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}
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else
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{
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/* ZZZ is this the correct result? */
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result = OK;
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}
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out:
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__fd_unlock(fd);
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__stdio_unlock();
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RETURN(result);
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return(result);
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}
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