NetBSD/sbin/slattach/slattach.c

173 lines
4.2 KiB
C

/* $NetBSD: slattach.c,v 1.30 2008/07/20 01:20:23 lukem Exp $ */
/*
* Copyright (c) 1988, 1993
* The 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. 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.
*/
#include <sys/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1988, 1993\
The Regents of the University of California. All rights reserved.");
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)slattach.c 8.2 (Berkeley) 1/7/94";
#else
__RCSID("$NetBSD: slattach.c,v 1.30 2008/07/20 01:20:23 lukem Exp $");
#endif
#endif /* not lint */
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <netinet/in.h>
#include <err.h>
#include <fcntl.h>
#include <netdb.h>
#include <paths.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
int speed = 9600;
int slipdisc = SLIPDISC;
char devicename[32];
int ttydisc(char *);
void usage(void);
int
main(int argc, char *argv[])
{
int fd;
char *dev = argv[1];
struct termios tty;
tcflag_t cflag = HUPCL;
int ch;
sigset_t nsigset;
int opt_detach = 1;
while ((ch = getopt(argc, argv, "hHlmns:t:")) != -1) {
switch (ch) {
case 'h':
cflag |= CRTSCTS;
break;
case 'H':
cflag |= CDTRCTS;
break;
case 'l':
cflag |= CLOCAL;
break;
case 'm':
cflag &= ~HUPCL;
break;
case 'n':
opt_detach = 0;
break;
case 's':
speed = atoi(optarg);
break;
case 'r': case 't':
slipdisc = ttydisc(optarg);
break;
case '?':
default:
usage();
}
}
argc -= optind;
argv += optind;
if (argc != 1)
usage();
dev = *argv;
if (strncmp(_PATH_DEV, dev, sizeof(_PATH_DEV) - 1)) {
(void)snprintf(devicename, sizeof(devicename),
"%s%s", _PATH_DEV, dev);
dev = devicename;
}
if ((fd = open(dev, O_RDWR | O_NDELAY)) < 0)
err(1, "%s", dev);
tty.c_cflag = CREAD | CS8 | cflag;
tty.c_iflag = 0;
tty.c_lflag = 0;
tty.c_oflag = 0;
tty.c_cc[VMIN] = 1;
tty.c_cc[VTIME] = 0;
cfsetspeed(&tty, speed);
if (tcsetattr(fd, TCSADRAIN, &tty) < 0)
err(1, "tcsetattr");
if (ioctl(fd, TIOCSDTR, 0) < 0)
err(1, "TIOCSDTR");
if (ioctl(fd, TIOCSETD, &slipdisc) < 0)
err(1, "TIOCSETD");
if (opt_detach && daemon(0, 0) != 0)
err(1, "couldn't detach");
sigemptyset(&nsigset);
for (;;)
sigsuspend(&nsigset);
}
int
ttydisc(char *name)
{
if (strcmp(name, "slip") == 0)
return(SLIPDISC);
#ifdef STRIPDISC
else if (strcmp(name, "strip") == 0)
return(STRIPDISC);
#endif
else
usage();
/* NOTREACHED */
return -1;
}
void
usage(void)
{
(void)fprintf(stderr,
"usage: %s [-t ldisc] [-hHlmn] [-s baudrate] ttyname\n",
getprogname());
exit(1);
}