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/* $OpenBSD: nmeaattach.c,v 1.6 2006/11/29 12:09:02 mbalmer Exp $ */
/*
* Copyright (c) 1988, 1993
* The Regents of the University of California. All rights reserved.
* Copyright (c) 2006 Marc Balmer <mbalmer@openbsd.org>
*
* 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/ioctl.h>
#include <sys/ttycom.h>
#include <err.h>
#include <fcntl.h>
#include <paths.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
int speed = B4800;
char devicename[32];
__dead void usage(void);
void coroner(int);
volatile sig_atomic_t dying = 0;
__dead void
usage(void)
{
extern char *__progname;
fprintf(stderr, "usage: %s [-dhm] [-s baudrate] [-t cond] device\n",
__progname);
exit(1);
}
int
main(int argc, char *argv[])
{
int fd;
char *dev;
struct termios tty;
struct tstamps tstamps;
const char *errstr;
tcflag_t cflag = HUPCL;
int ch;
sigset_t sigset;
int nmeadisc = NMEADISC;
int nodaemon = 0;
tstamps.ts_set = tstamps.ts_clr = 0;
while ((ch = getopt(argc, argv, "dhms:t:")) != -1) {
switch (ch) {
case 'd':
nodaemon = 1;
break;
case 'h':
cflag |= CRTSCTS;
break;
case 'm':
cflag &= ~HUPCL;
break;
case 's':
speed = (int)strtonum(optarg, 50, 115200, &errstr);
if (errstr)
errx(1, "speed is %s: %s", errstr, optarg);
break;
case 't':
if (!strcasecmp(optarg, "dcd"))
tstamps.ts_set |= TIOCM_CAR;
else if (!strcasecmp(optarg, "!dcd"))
tstamps.ts_clr |= TIOCM_CAR;
else if (!strcasecmp(optarg, "cts"))
tstamps.ts_set |= TIOCM_CTS;
else if (!strcasecmp(optarg, "!cts"))
tstamps.ts_clr |= TIOCM_CTS;
else
errx(1, "'%s' not supported for timestamping",
optarg);
break;
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)) < 0)
err(1, "open: %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, &nmeadisc) < 0)
err(1, "TIOCSETD");
if ((tstamps.ts_set || tstamps.ts_clr) &&
ioctl(fd, TIOCSTSTAMP, &tstamps) < 0)
err(1, "TIOCSTSTAMP");
if (!nodaemon && daemon(0, 0))
errx(1, "can't daemonize");
signal(SIGHUP, coroner);
signal(SIGTERM, coroner);
sigemptyset(&sigset);
for (;;) {
sigsuspend(&sigset);
if (dying)
return (0);
}
}
/* ARGSUSED */
void
coroner(int useless)
{
dying = 1;
}
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