diff options
Diffstat (limited to 'src/modem.c')
-rw-r--r-- | src/modem.c | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/src/modem.c b/src/modem.c new file mode 100644 index 0000000..677d4cf --- /dev/null +++ b/src/modem.c @@ -0,0 +1,76 @@ +/* $Id$ + * + * This file is part of pgets. + * + * pgets is free software; 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. + * + * pgets 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 General Public License + * for more details. + * + * You should have received a copy of the GNU General Public License + * along with pgets; if not, write to the Free Software Foundation, + * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. + */ + +#include <termios.h> +#include <unistd.h> +#include <fcntl.h> +#include <stdio.h> +#include <string.h> + +#include "modem.h" + +static struct termios _saved_termios; + +/* Opens the modem and sets the baud rate */ +int modem_open(const char *dev) { + struct termios pts; + int fd, n; + + if ((fd = open(dev, O_RDWR|O_NDELAY)) < 0) { + perror("Serial port open failure"); + return -1; + } + + n = fcntl(fd, F_GETFL, 0); + fcntl(fd, F_SETFL, n & ~O_NDELAY); + + if (tcgetattr(fd, &_saved_termios) != 0) { + perror("Serial port TERMIOS get failure"); + close(fd); + return -1; + } + + memset(&pts, 0, sizeof pts); + pts.c_cflag = CS8 | CLOCAL | CREAD; + pts.c_iflag = IGNPAR | IGNBRK | IGNCR | IXON | IXOFF; + pts.c_oflag = 0; + pts.c_lflag = 0; + + pts.c_cc[VMIN] = 1; + pts.c_cc[VTIME] = 0; + + cfsetospeed(&pts, B9600); + cfsetispeed(&pts, B9600); + + tcflush(fd, TCIFLUSH); + if (tcsetattr(fd, TCSANOW, &pts) != 0) { + perror("Serial port TERMIOS set failure"); + close(fd); + return -1; + } + + return fd; +} + +/* Closes the modem device and resets the baudrate */ +void modem_close(int fd) { + tcflush(fd, TCIFLUSH); + tcsetattr(fd, TCSANOW, &_saved_termios); + close(fd); +} |