NetBSD/sbin/slattach/slattach.c

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/* $NetBSD: slattach.c,v 1.22 1999/09/03 13:31:29 proff Exp $ */
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/*
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* Copyright (c) 1988, 1993
* The Regents of the University of California. All rights reserved.
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*
* 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.
*/
#include <sys/cdefs.h>
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#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1988, 1993\n\
The Regents of the University of California. All rights reserved.\n");
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#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)slattach.c 8.2 (Berkeley) 1/7/94";
#else
__RCSID("$NetBSD: slattach.c,v 1.22 1999/09/03 13:31:29 proff Exp $");
#endif
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#endif /* not lint */
#include <sys/param.h>
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#include <sys/socket.h>
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#include <sys/types.h>
#include <sys/ioctl.h>
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#include <net/if.h>
#include <netinet/in.h>
#include <err.h>
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#include <fcntl.h>
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#include <netdb.h>
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#include <paths.h>
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#include <signal.h>
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#include <stdio.h>
#include <stdlib.h>
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#include <string.h>
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#include <termios.h>
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#include <unistd.h>
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int speed = 9600;
int slipdisc = SLIPDISC;
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char devicename[32];
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int main __P((int, char *[]));
int ttydisc __P((char *));
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void usage __P((void));
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int
main(argc, argv)
int argc;
char *argv[];
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{
int fd;
char *dev = argv[1];
struct termios tty;
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tcflag_t cflag = HUPCL;
int ch;
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sigset_t sigset;
int opt_detach = 1;
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while ((ch = getopt(argc, argv, "hHlmns:t:")) != -1) {
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switch (ch) {
case 'h':
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cflag |= CRTSCTS;
break;
case 'H':
cflag |= CDTRCTS;
break;
case 'l':
cflag |= CLOCAL;
break;
case 'm':
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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:
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usage();
}
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}
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argc -= optind;
argv += optind;
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if (argc != 1)
usage();
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dev = *argv;
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if (strncmp(_PATH_DEV, dev, sizeof(_PATH_DEV) - 1)) {
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(void)snprintf(devicename, sizeof(devicename),
"%s%s", _PATH_DEV, dev);
dev = devicename;
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}
if ((fd = open(dev, O_RDWR | O_NDELAY)) < 0)
err(1, "%s", dev);
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tty.c_cflag = CREAD | CS8 | cflag;
tty.c_iflag = 0;
tty.c_lflag = 0;
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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");
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sigemptyset(&sigset);
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for (;;)
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sigsuspend(&sigset);
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}
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int
ttydisc(name)
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;
}
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void
usage()
{
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extern char *__progname;
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(void)fprintf(stderr,
"usage: %s [-t ldisc] [-hHlm] [-s baudrate] ttyname\n",
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__progname);
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exit(1);
}