NetBSD/sbin/slattach/slattach.c

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/*
* Copyright (c) 1988 Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Rick Adams.
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*/
/*
* Hacked to change from sgtty to POSIX termio style serial line control
* and added flag to enable cts/rts style flow control.
*
* blymn@awadi.com.au (Brett Lymn) 93.04.04
*/
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#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1988 Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */
#ifndef lint
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/*static char sccsid[] = "from: @(#)slattach.c 4.6 (Berkeley) 6/1/90";*/
static char rcsid[] = "$Id: slattach.c,v 1.11 1994/02/10 18:03:23 cgd Exp $";
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#endif /* not lint */
#include <sys/param.h>
#include <sys/ioctl.h>
#include <termios.h>
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#include <netdb.h>
#include <fcntl.h>
#include <stdio.h>
#include <paths.h>
#define DEFAULT_BAUD 9600
static char usage_str[] = "\
usage: %s [-h] [-m] [-s <speed>] <device>\n\
-h -- turn on CTS/RTS style flow control\n\
-m -- maintain DTR after last close (no HUPCL)\n\
-s -- baud rate (default 9600)\n";
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int main(int argc, char **argv)
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{
struct termios tty;
int option;
int fd;
char devname[32];
char *dev = (char *)0;
int slipdisc = SLIPDISC;
int speed = DEFAULT_BAUD;
int cflags = HUPCL;
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extern char *optarg;
extern int optind;
while ((option = getopt(argc, argv, "achmns:")) != EOF) {
switch (option) {
case 'h':
cflags |= CRTSCTS;
break;
case 'm':
cflags &= ~HUPCL;
break;
case 's':
speed = atoi(optarg);
break;
case '?':
default:
fprintf(stderr, usage_str, argv[0]);
exit(1);
}
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}
if (optind == argc - 1)
dev = argv[optind];
if (dev == (char *)0) {
fprintf(stderr, usage_str, argv[0]);
exit(2);
}
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if (strncmp(_PATH_DEV, dev, sizeof(_PATH_DEV) - 1)) {
strcpy(devname, _PATH_DEV);
strcat(devname, "/");
strncat(devname, dev, 10);
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dev = devname;
}
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if ((fd = open(dev, O_RDWR | O_NDELAY)) < 0) {
perror(dev);
exit(1);
}
if (tcgetattr(fd, &tty) < 0) {
perror("tcgetattr");
close(fd);
exit(1);
}
tty.c_iflag = 0;
tty.c_oflag = 0;
tty.c_cflag = CREAD | CS8 | cflags;
tty.c_lflag = 0;
tty.c_cc[VMIN] = 1; /* wait for one char */
tty.c_cc[VTIME] = 0; /* wait forever for a char */
cfsetispeed(&tty, speed);
cfsetospeed(&tty, speed);
if (tcsetattr(fd, TCSADRAIN, &tty) < 0) {
perror("tcsetattr");
close(fd);
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exit(1);
}
if (ioctl(fd, TIOCSDTR) < 0) {
perror("ioctl(TIOCSDTR)");
close(fd);
exit(1);
}
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if (ioctl(fd, TIOCSETD, &slipdisc) < 0) {
perror("ioctl(TIOCSETD)");
close(fd);
exit(1);
}
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if (fork() > 0)
exit(0);
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for (;;)
sigpause(0L);
}