library/termios_tcsendbreak.c
/*
* $Id: termios_tcsendbreak.c,v 1.3 2006-01-08 12:04:27 obarthel Exp $
*
* :ts=4
*
* Portable ISO 'C' (1994) runtime library for the Amiga computer
* Copyright (c) 2002-2015 by Olaf Barthel <obarthel (at) gmx.net>
* 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 */
/****************************************************************************/
/*
* tcsendbreak() has a rather odd time specification.
* If duration is 0, it will send a BREAK for 0.25-0.5 seconds
* and if duration is non-zero...
* Linux asserts BREAK for N*duration where N is somewhere between 0.25 and 0.5 seconds.
* Solaris calls tcdrain() instead. (According to the manual)
* Let us try the Solaris way and see how it goes.
*
* If the file descriptor does not referr to a serial port, no action is needed.
*/
int
tcsendbreak(int file_descriptor,int duration)
{
int result = ERROR;
struct fd *fd;
struct termios *tios;
ENTER();
SHOWVALUE(file_descriptor);
SHOWVALUE(duration);
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);
assert( fd->fd_Aux != NULL );
tios = fd->fd_Aux;
switch(tios->type)
{
case TIOST_CONSOLE:
result = OK;
break;
case TIOST_SERIAL:
if(duration == 0)
{
/* TODO */
result = OK;
}
else
{
result = tcdrain(file_descriptor);
}
break;
default:
SHOWMSG("Invalid tios type in tcsendbreak.");
goto out;
}
out:
__fd_unlock(fd);
__stdio_unlock();
RETURN(result);
return(result);
}