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			ttyrecv.c
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/*====================================================================*
 *
 *   Copyright (c) 2013 Qualcomm Atheros, Inc.
 *
 *   All rights reserved.
 *
 *   Redistribution and use in source and binary forms, with or 
 *   without modification, are permitted (subject to the limitations 
 *   in the disclaimer below) 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.
 *
 *   * Redistributions in binary form must reproduce the above 
 *     copyright notice, this list of conditions and the following 
 *     disclaimer in the documentation and/or other materials 
 *     provided with the distribution.
 *
 *   * Neither the name of Qualcomm Atheros nor the names of 
 *     its contributors may be used to endorse or promote products 
 *     derived from this software without specific prior written 
 *     permission.
 *
 *   NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE 
 *   GRANTED BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE 
 *   COPYRIGHT HOLDERS AND CONTRIBUTORS &quot;AS IS&quot; 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.  
 *
 *--------------------------------------------------------------------*/

/*====================================================================*
 *
 *   ttyrecv.c
 *
 *   Contributor(s):
 *	Nathaniel Houghton &lt;nhoughto@qca.qualcomm.com&gt;
 *
 *--------------------------------------------------------------------*/

/*====================================================================*
 *   system header files;
 *--------------------------------------------------------------------*/

#include &lt;sys/time.h&gt;
#include &lt;sys/types.h&gt;

#include &lt;fcntl.h&gt;
#include &lt;limits.h&gt;
#include &lt;stdio.h&gt;
#include &lt;stdlib.h&gt;
#include &lt;string.h&gt;
#include &lt;unistd.h&gt;
#include &lt;termios.h&gt;

/*====================================================================*
 *   custom header files;
 *--------------------------------------------------------------------*/

#include &quot;../tools/error.h&quot;
#include &quot;../tools/putoptv.h&quot;
#include &quot;../tools/getoptv.h&quot;
#include &quot;../tools/number.h&quot;
#include &quot;../tools/types.h&quot;
#include &quot;../tools/flags.h&quot;
#include &quot;../serial/serial.h&quot;

/*====================================================================*
 *   custom source files;
 *--------------------------------------------------------------------*/

#ifndef MAKEFILE
#include &quot;../tools/getoptv.c&quot;
#include &quot;../tools/putoptv.c&quot;
#include &quot;../tools/version.c&quot;
#include &quot;../tools/error.c&quot;
#include &quot;../tools/uintspec.c&quot;
#include &quot;../tools/todigit.c&quot;
#endif

#ifndef MAKEFILE
#include &quot;../serial/baudrate.c&quot;
#endif

/*====================================================================*
 *   program constants;
 *--------------------------------------------------------------------*/

#define SERIAL_PORT &quot;/dev/ttyS0&quot;

#define TTYRECV_VERBOSE (1 &lt;&lt; 0)

/*====================================================================*
 *
 *   double ttyrecv (int ifd, int ofd, size_t time, size_t chunk_size, flag_t flags) ;
 *
 *--------------------------------------------------------------------*/

static double ttyrecv (int ifd, int ofd, size_t time, size_t chunk_size, flag_t flags)

{
	char *buf;
	char *p;
	ssize_t r;
	ssize_t w;
	size_t bytes_read;
	struct timeval tv_start,
	tv_now,
	tv_result;
	struct timeval tv_timeout;
	double bytes_sec;
	fd_set rfd;
	buf = malloc (chunk_size);
	if (buf == NULL)
	{
		error (1, errno, &quot;could not allocate memory&quot;);
	}
	tcflush (ifd, TCIFLUSH);
	FD_ZERO (&amp;rfd);
	FD_SET (ifd, &amp;rfd);
	tv_timeout.tv_sec = 5;
	tv_timeout.tv_usec = 0;
	if (select (ifd + 1, &amp;rfd, NULL, NULL, &amp;tv_timeout) != 1)
	{
		error (1, errno, &quot;timed out waiting for data&quot;);
	}
	if (gettimeofday (&amp;tv_start, NULL) == -1)
	{
		error (1, errno, &quot;could not get time&quot;);
	}
	if (_anyset (flags, TTYRECV_VERBOSE))
	{
		fprintf (stderr, &quot;Started receive timer.\n&quot;);
	}
	bytes_read = 0;
	do
	{
		FD_ZERO (&amp;rfd);
		FD_SET (ifd, &amp;rfd);
		tv_timeout.tv_sec = 1;
		tv_timeout.tv_usec = 0;
		if (select (ifd + 1, &amp;rfd, NULL, NULL, &amp;tv_timeout) == 1)
		{
			r = read (ifd, buf, chunk_size);
			if (r == -1)
			{
				error (1, 0, &quot;could not read&quot;);
			}
			bytes_read += r;
			if (ofd != -1)
			{
				p = buf;
				while (r)
				{
					w = write (ofd, p, r);
					if (w == -1)
					{
						error (1, errno, &quot;could not write&quot;);
					}
					p += w;
					r -= w;
				}
			}
		}
		if (gettimeofday (&amp;tv_now, NULL) == -1)
		{
			error (1, errno, &quot;could not get time&quot;);
		}
		timersub (&amp;tv_now, &amp;tv_start, &amp;tv_result);
	}
	while (tv_result.tv_sec &lt; (signed)(time));
	bytes_sec = bytes_read / (tv_result.tv_sec + tv_result.tv_usec / 1000000.0);
	free (buf);
	return (bytes_sec * 8 / 1000.0);
}

/*====================================================================*
 *
 *   int main (int argc, char const * argv []);
 *
 *
 *--------------------------------------------------------------------*/

int main (int argc, char const * argv [])

{
	static char const * optv [] =
	{
		&quot;cl:rs:t:qv&quot;,
		&quot;&quot;,
		&quot;Serial Line Rate Tester&quot;,
		&quot;c\tconsume received data (do not output to stdout)&quot;,
		&quot;l f\tserial port is (f) [&quot; SERIAL_PORT &quot;]&quot;,
		&quot;r\tprint the receive data rate to stdout&quot;,
		&quot;s n\tport speed [ 115200 ]&quot;,
		&quot;t n\treceive for (n) seconds [ 10 ]&quot;,
		&quot;q\tquiet mode&quot;,
		&quot;v\tverbose mode&quot;,
		(char const *) (0)
	};
	struct termios termios;
	char * line = SERIAL_PORT;
	double rate = 0;
	speed_t speed = B115200;
	size_t time = 10;
	size_t chunk_size = 256;
	flag_t flags = 0;
	signed consume = 0;
	signed rflag = 0;
	signed fd;
	signed c;
	optind = 1;
	while ((c = getoptv (argc, argv, optv)) != -1)
	{
		switch ((char) (c))
		{
		case 'c':
			consume = 1;
			break;
		case 'r':
			rflag = 1;
			break;
		case 'l':
			line = optarg;
			break;
		case 's':
			if (baudrate (uintspec (optarg, 0, UINT_MAX), &amp;speed))
			{
				error (1, 0, &quot;could not set baud rate&quot;);
			}
			break;
		case 't':
			time = uintspec (optarg, 0, SIZE_MAX);
			break;
		case 'v':
			_setbits (flags, TTYRECV_VERBOSE);
			break;
		default:
			break;
		}
	}
	argc -= optind;
	argv += optind;
	fd = open (line, O_RDWR | O_NONBLOCK | O_NOCTTY);
	if (fd == - 1)
	{
		error (1, errno, &quot;could not open %s&quot;, line);
	}
	if (fcntl(fd, F_SETFL, 0) == -1)
	{
		error (1, errno, &quot;failed to set tty flags&quot;);
	}
	if (tcgetattr (fd, &amp; termios) == - 1)
	{
		error (1, errno, &quot;could not get tty attributes&quot;);
	}
	cfmakeraw (&amp; termios);
	termios.c_cflag = CS8 | CREAD | CLOCAL;
	if (cfsetspeed (&amp; termios, speed) == - 1)
	{
		error (1, errno, &quot;could not set tty speed&quot;);
	}
	if (tcsetattr (fd, TCSANOW, &amp;termios) == -1)
	{
		error (1, errno, &quot;could not set tty attributes&quot;);
	}
	if (!consume)
	{
		rate = ttyrecv (fd, STDOUT_FILENO, time, chunk_size, flags);
	}
	else
	{
		rate = ttyrecv (fd, -1, time, chunk_size, flags);
	}
	if (rflag)
	{
		fprintf (stderr, &quot;%.02f Kbps\n&quot;, rate);
	}
	close (fd);
	return (0);
}


</pre>
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