nes-proj/tools/scat.c

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/*
* Copyright (c) 2006, Swedish Institute of Computer Science
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*
* $Id: scat.c,v 1.5 2007/02/02 13:26:49 bg- Exp $
*
*/
#include <stdio.h>
#include <ctype.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <sys/types.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <termios.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <err.h>
#define SLIP_END 0300
#define SLIP_ESC 0333
#define SLIP_ESC_END 0334
#define SLIP_ESC_ESC 0335
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#ifndef BAUDRATE
#define BAUDRATE B115200
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#endif
speed_t b_rate = BAUDRATE;
void
stty_telos(int fd)
{
struct termios tty;
int i;
if(tcflush(fd, TCIOFLUSH) == -1) err(1, "tcflush");
if(tcgetattr(fd, &tty) == -1) err(1, "tcgetattr");
cfmakeraw(&tty);
/* Blocking read. */
tty.c_cc[VTIME] = 0;
tty.c_cc[VMIN] = 1;
tty.c_cflag &= ~CRTSCTS;
tty.c_cflag &= ~HUPCL;
tty.c_cflag &= ~CLOCAL;
cfsetispeed(&tty, b_rate);
cfsetospeed(&tty, b_rate);
if(tcsetattr(fd, TCSAFLUSH, &tty) == -1) err(1, "tcsetattr");
tty.c_cflag |= CLOCAL;
if(tcsetattr(fd, TCSAFLUSH, &tty) == -1) err(1, "tcsetattr");
i = TIOCM_DTR;
if(ioctl(fd, TIOCMBIS, &i) == -1) err(1, "ioctl");
usleep(10*1000); /* Wait for hardware 10ms. */
/* Flush input and output buffers. */
if(tcflush(fd, TCIOFLUSH) == -1) err(1, "tcflush");
}
int
main(int argc, char **argv)
{
int c;
int slipfd;
FILE *inslip;
const char *siodev;
int baudrate = -2;
while ((c = getopt(argc, argv, "B:")) != -1) {
switch (c) {
case 'B':
baudrate = atoi(optarg);
break;
case '?':
case 'h':
default:
err(1, "usage: scat [-B baudrate] device-file");
break;
}
}
argc -= (optind - 1);
argv += (optind - 1);
switch (baudrate) {
case -2:
break; /* Use default. */
case 9600:
b_rate = B9600;
break;
case 19200:
b_rate = B19200;
break;
case 38400:
b_rate = B38400;
break;
case 57600:
b_rate = B57600;
break;
case 115200:
b_rate = B115200;
break;
default:
err(1, "unknown baudrate %d", baudrate);
break;
}
if (argc != 2)
err(1, "usage: scat device-file");
siodev = argv[1];
slipfd = open(siodev, O_RDWR);
if (slipfd == -1) err(1, "can't open '%s'", siodev);
stty_telos(slipfd);
inslip = fdopen(slipfd, "r");
if(inslip == NULL) err(1, "main: fdopen");
while (1) {
int c = getc(inslip);
while (c == SLIP_END)
c = getc(inslip);
do {
if (c == SLIP_ESC) {
c = getc(inslip);
if (c == SLIP_ESC_ESC)
c = SLIP_ESC;
else if (c == SLIP_ESC_END)
c = SLIP_END;
}
switch (c) {
case EOF:
err(1, "getc(inslip)");
break;
case '\007':
case '\b':
case '\f':
case '\n':
case '\r':
case '\t':
case '\v':
putchar(c);
break;
default:
if (isprint(c))
putchar(c);
else
printf("%02x ", c);
break;
}
c = getc(inslip);
} while (c != SLIP_END);
}
return 0;
}