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//
// Copyright (c) 1994, 1995, 2006 by Mike Romberg ( mike.romberg@noaa.gov )
//
// This file may be distributed under terms of the GPL
//
//
// In order to use this new serial meter, xosview needs to be suid root.
//
#include "serialmeter.h"
#include <linux/serial.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include <iostream>
#include <string>
#include <sstream>
#include <iomanip>
/*
* To fetch status information requires ioperm() and inb()
* otherwise these meter is largely a no-op.
*/
#if defined(__i386__) || defined(__amd64__)
#include <sys/io.h>
#define HAVE_IOPERM
#endif
SerialMeter::SerialMeter( XOSView *parent, Device device )
: BitMeter( parent, getTitle(device), "LSR bits(0-7), MSR bits(0-7)", 16){
_device = device;
_port = 0;
}
SerialMeter::~SerialMeter( void ){
}
void SerialMeter::checkevent( void ){
getserial();
BitMeter::checkevent();
}
void SerialMeter::checkResources( void ){
BitMeter::checkResources();
onColor_ = parent_->allocColor( parent_->getResource( "serialOnColor" ) );
offColor_ = parent_->allocColor( parent_->getResource( "serialOffColor" ) );
priority_ = atoi (parent_->getResource( "serialPriority" ) );
_port = getPortBase(_device);
if (!getport(_port + UART_LSR) || !getport(_port + UART_MSR)){
std::cerr << "SerialMeter::SerialMeter() : "
<< "xosview must be suid root to use the serial meter." << std::endl;
parent_->done(1);
}
}
bool SerialMeter::getport(unsigned short int port){
#ifdef HAVE_IOPERM
return ioperm(port, 1, 1) != -1;
#else
return false;
#endif
}
void SerialMeter::getserial( void ){
#ifdef HAVE_IOPERM
// get the LSR and MSR
unsigned char lsr = inb(_port + UART_LSR);
unsigned char msr = inb(_port + UART_MSR);
setBits(0, lsr);
setBits(8, msr);
#endif
}
const char *SerialMeter::getTitle(Device dev) const {
static const char *names[] = { "ttyS0", "ttyS1", "ttyS2", "ttyS3",
"ttyS4", "ttyS5", "ttyS6", "ttyS7",
"ttyS8", "ttyS9" };
return names[dev];
}
const char *SerialMeter::getResourceName(Device dev){
static const char *names[] = { "serial0", "serial1",
"serial2", "serial3",
"serial4", "serial5",
"serial6", "serial7",
"serial8", "serial9" };
return names[dev];
}
unsigned short int SerialMeter::getPortBase(Device dev) const {
static const char *deviceFile[] = { "/dev/ttyS0",
"/dev/ttyS1",
"/dev/ttyS2",
"/dev/ttyS3",
"/dev/ttyS4",
"/dev/ttyS5",
"/dev/ttyS6",
"/dev/ttyS7",
"/dev/ttyS8",
"/dev/ttyS9"};
const char* res = parent_->getResource(getResourceName(dev));
if (!strncasecmp(res, "True", 5)){ // Autodetect portbase.
int fd;
struct serial_struct serinfo;
// get the real serial port (code stolen from setserial 2.11)
if ((fd = open(deviceFile[dev], O_RDONLY|O_NONBLOCK)) < 0) {
std::cerr << "SerialMeter::SerialMeter() : "
<< "failed to open " << deviceFile[dev] <<"." <<std::endl;
exit(1);
}
if (ioctl(fd, TIOCGSERIAL, &serinfo) < 0) {
std::cerr << "Failed to detect port base for " << deviceFile[dev]
<< std::endl;
close(fd);
exit(1);
}
close(fd);
return serinfo.port;
}
else { // Use user specified port base.
std::string s(res);
std::istringstream istrm(s);
unsigned short int tmp = 0;
istrm >> std::hex >> tmp;
return tmp;
}
return 0;
}
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