/*====================================================================*
*
*   Copyright (c) 2013 Qualcomm Atheros, Inc.
*
*   All rights reserved.
*
*====================================================================*/

/*====================================================================*
 *
 *   ttycat.c - serial port test program;
 *
 *   write one or more files to a serial device;
 *
 *--------------------------------------------------------------------*/

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

#include <stdlib.h>
#include <limits.h>
#include <memory.h>
#include <signal.h>
#include <termios.h>
#include <unistd.h>

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

#include "../tools/getoptv.h"
#include "../tools/putoptv.h"
#include "../tools/number.h"
#include "../tools/error.h"
#include "../tools/files.h"
#include "../serial/serial.h"

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

#ifndef MAKEFILE
#include "../tools/getoptv.c"
#include "../tools/putoptv.c"
#include "../tools/version.c"
#include "../tools/efreopen.c"
#include "../tools/uintspec.c"
#include "../tools/todigit.c"
#include "../tools/error.c"
#endif

/*====================================================================*
 *   program warnings;
 *--------------------------------------------------------------------*/

#if defined (WIN32)
#error "This program does not support Windows platforms"
#endif

/*====================================================================*
 *
 *   signed copy (signed ifd, signed ofd, void * memory, signed extent) 
 *
 *   copy ifd to ofd using a buffer of specified size;
 *
 *--------------------------------------------------------------------*/

static signed copy (signed ifd, signed ofd, void * memory, signed extent) 

{ 
	while ((extent = read (ifd, memory, extent)) > 0) 
	{ 
		if (write (ofd, memory, extent) < extent) 
		{ 
			return (- 1); 
		} 
	} 
	return (0); 
} 

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

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

{ 
	static char const * optv [] = 
	{ 
		"s:", 
		PUTOPTV_S_FUNNEL, 
		"copy one or more files to a  serial device", 
		"s n\tline speed is (n) [115200]", 
		(char const *) (0)
	}; 
	struct termios restore; 
	struct termios current; 
	speed_t speed = B115200; 
	byte buffer [512]; 
	signed c; 
	while (~ (c = getoptv (argc, argv, optv))) 
	{ 
		switch (c) 
		{ 
		case 's': 
			if (baudrate (uintspec (optarg, 0, UINT_MAX), & speed)) 
			{ 
				error (1, 0, "could not set baud rate"); 
			} 
			break; 
		default: 
			break; 
		} 
	} 
	argc -= optind; 
	argv += optind; 
	if (! isatty (STDOUT_FILENO)) 
	{ 
		error (1, ENOTSUP, "stdout must be a serial line device"); 
	} 
	tcflush (STDOUT_FILENO, TCIFLUSH); 
	tcgetattr (STDOUT_FILENO, & restore); 
	memset (& current, 0, sizeof (current)); 
	current.c_cflag = speed | CS8 | CLOCAL | CREAD; 
	current.c_iflag = IGNPAR; 
	current.c_oflag = 0; 
	current.c_lflag = 0; 
	current.c_cc [VTIME] = 0; 
	current.c_cc [VMIN] = 5; 
	tcsetattr (STDOUT_FILENO, TCSANOW, & current); 
	if (! argc) 
	{ 
		copy (STDIN_FILENO, STDOUT_FILENO, buffer, sizeof (buffer)); 
	} 
	while ((argc) && (* argv)) 
	{ 
		if (efreopen (* argv, "rb", stdin)) 
		{ 
			copy (STDIN_FILENO, STDOUT_FILENO, buffer, sizeof (buffer)); 
		} 
		argc--; 
		argv++; 
	} 
	tcsetattr (STDOUT_FILENO, TCSANOW, & restore); 
	exit (0); 
}