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/*
* cwdaemon - morse sounding daemon for the parallel or serial port
* Copyright (C) 2002 -2005 Joop Stakenborg <pg4i@amsat.org>
* and many authors, see the AUTHORS file.
*
* This program is free oftware; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Library General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
# if HAVE_STDIO_H
# include <stdio.h>
#endif
#if STDC_HEADERS
# include <stdlib.h>
# include <stddef.h>
#else
# if HAVE_STDLIB_H
# include <stdlib.h>
# endif
#endif
#if HAVE_UNISTD_H
# include <unistd.h>
#endif
#if HAVE_SYS_IOCTL_H
# include <sys/ioctl.h>
#endif
#if HAVE_FCNTL_H
# include <fcntl.h>
#endif
#if HAVE_TERMIOS_H
# include <termios.h>
#endif
#if HAVE_SYS_STAT_H
# include <sys/stat.h>
#endif
#if (defined(__unix__) || defined(unix)) && !defined(USG)
# include <sys/param.h>
#endif
#include "cwdaemon.h"
/* serial port functions*/
/*
* dev_is_tty(name): check to see whether 'name' is a tty type character
* device capable of TIOCM*. Returns -1 if the device isn't a
* suitable tty device, and a file descriptor if it is. This should
* be platform independent.
*/
int
dev_is_tty(const char *fname)
{
char nm[MAXPATHLEN];
struct stat st;
int fd, m;
m = snprintf(nm, sizeof(nm), "/dev/%s", fname);
if (m >= sizeof(nm))
return (-1);
if ((fd = open(nm, O_RDWR | O_NOCTTY | O_NONBLOCK)) == -1)
return (-1);
if (fstat(fd, &st) == -1)
goto out;
if ((st.st_mode & S_IFMT) != S_IFCHR)
goto out;
if (ioctl(fd, TIOCMGET, &m) == -1)
goto out;
return (fd);
out:
close(fd);
return (-1);
}
int
ttys_init (cwdevice * dev, int fd)
{
dev->fd = fd;
dev->reset (dev);
return 0;
}
int
ttys_free (cwdevice * dev)
{
dev->reset (dev);
close (dev->fd);
return 0;
}
int
ttys_reset (cwdevice * dev)
{
ttys_cw (dev, OFF);
ttys_ptt (dev, OFF);
return 0;
}
/* CW keying - bit1 (pin 4 for DB-9) */
int
ttys_cw (cwdevice * dev, int onoff)
{
int result, y = TIOCM_DTR;
result = ioctl (dev->fd, onoff ? TIOCMBIS : TIOCMBIC, &y);
if (result < 0)
{
errmsg ("Ioctl serial port %s", dev->desc);
exit (1);
}
return 0;
}
/* SSB PTT keying - 0 bit (pin 7 for DB-9) */
int
ttys_ptt (cwdevice * dev, int onoff)
{
int result, y = TIOCM_RTS;
result = ioctl (dev->fd, onoff ? TIOCMBIS : TIOCMBIC, &y);
if (result < 0)
{
errmsg ("Ioctl serial port %s", dev->desc);
exit (1);
}
return 0;
}
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