mirror of
https://github.com/adtools/clib2.git
synced 2025-12-08 14:59:05 +00:00
3a0324e4ff
resolution. - In tcflush() a break signal can no longer cause the read flush loop to be quit with two semaphores still locked. git-svn-id: file:///Users/olsen/Code/migration-svn-zu-git/logical-line-staging/clib2/trunk@15170 87f5fb63-7c3d-0410-a384-fd976d0f7a62
147 lines
3.7 KiB
C
Executable File
147 lines
3.7 KiB
C
Executable File
/*
|
|
* $Id: termios_tcflush.c,v 1.5 2006-11-16 14:39:23 obarthel Exp $
|
|
*
|
|
* :ts=4
|
|
*
|
|
* Portable ISO 'C' (1994) runtime library for the Amiga computer
|
|
* Copyright (c) 2002-2006 by Olaf Barthel <olsen (at) sourcery.han.de>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* - Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
*
|
|
* - Neither the name of Olaf Barthel nor the names of contributors
|
|
* may be used to endorse or promote products derived from this
|
|
* software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
|
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef _TERMIOS_HEADERS_H
|
|
#include "termios_headers.h"
|
|
#endif /* _TERMIOS_HEADERS_H */
|
|
|
|
/****************************************************************************/
|
|
|
|
/*
|
|
* This is a bit messy and might possibly be done in a better way, but console
|
|
* termios support is a bit of a hack at best.
|
|
* tcflush() could possibly be implemented with using CMD_CLEAR with the
|
|
* console.device, but this would be just as messy and possibly break
|
|
* even more if e.g. stdin is a pipe.
|
|
*/
|
|
|
|
int
|
|
tcflush(int file_descriptor,int queue)
|
|
{
|
|
int result = ERROR;
|
|
struct fd *fd;
|
|
|
|
ENTER();
|
|
|
|
SHOWVALUE(file_descriptor);
|
|
|
|
if(__check_abort_enabled)
|
|
__check_abort();
|
|
|
|
__stdio_lock();
|
|
|
|
fd = __get_file_descriptor(file_descriptor);
|
|
if(fd == NULL || FLAG_IS_CLEAR(fd->fd_Flags,FDF_TERMIOS))
|
|
{
|
|
__set_errno(EBADF);
|
|
goto out;
|
|
}
|
|
|
|
__fd_lock(fd);
|
|
|
|
if(queue < TCIFLUSH || queue > TCIOFLUSH)
|
|
{
|
|
SHOWMSG("Invalid queue specified to tcflush().");
|
|
|
|
__set_errno(EINVAL);
|
|
goto out;
|
|
}
|
|
|
|
if(queue == TCIFLUSH || queue == TCIOFLUSH)
|
|
{
|
|
LONG num_bytes_read;
|
|
char buf[64];
|
|
struct termios *tios;
|
|
BPTR file;
|
|
|
|
tios = fd->fd_Aux;
|
|
|
|
file = __resolve_fd_file(fd);
|
|
if(file == ZERO)
|
|
{
|
|
__set_errno(EBADF);
|
|
goto out;
|
|
}
|
|
|
|
/* Set raw mode so we can read without blocking. */
|
|
if(FLAG_IS_SET(tios->c_lflag,ICANON))
|
|
{
|
|
SetMode(file,DOSTRUE);
|
|
|
|
SET_FLAG(fd->fd_Flags,FDF_NON_BLOCKING);
|
|
}
|
|
|
|
while(WaitForChar(file,1) != DOSFALSE)
|
|
{
|
|
if(__check_abort_enabled && FLAG_IS_SET(SetSignal(0,0),__break_signal_mask))
|
|
break;
|
|
|
|
/* Read away available data. (upto 8k) */
|
|
num_bytes_read = Read(file,buf,64);
|
|
if(num_bytes_read == ERROR || num_bytes_read == 0)
|
|
break;
|
|
}
|
|
|
|
/* Restore the Raw/Cooked mode. */
|
|
if(FLAG_IS_SET(tios->c_lflag,ICANON))
|
|
{
|
|
SetMode(file,DOSFALSE); /* Set Cooked = Canonical mode. */
|
|
|
|
CLEAR_FLAG(fd->fd_Flags,FDF_NON_BLOCKING);
|
|
}
|
|
|
|
result = OK;
|
|
}
|
|
else if (queue == TCOFLUSH || queue == TCIOFLUSH)
|
|
{
|
|
/* TODO: Can we actually discard data buffered on the file?
|
|
* For now we do the same as tcdrain().
|
|
*/
|
|
result = tcdrain(file_descriptor);
|
|
}
|
|
else
|
|
{
|
|
/* ZZZ is this the correct result? */
|
|
result = OK;
|
|
}
|
|
|
|
out:
|
|
|
|
__fd_unlock(fd);
|
|
|
|
__stdio_unlock();
|
|
|
|
RETURN(result);
|
|
return(result);
|
|
}
|