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#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <unistd.h>
#include <string.h>
#include <netdb.h>
#include <sys/sysinfo.h>
#include <sys/ioctl.h>
#include <netinet/in.h>
#include <net/if.h>
#include <string>
#include <vector>
#include "statsd_client.h"
using namespace std;
static int running = 1;
void sigterm(int sig)
{
running = 0;
}
string localhost() {
struct addrinfo hints, *info, *p;
string hostname(1024, '\0');
gethostname((char*)hostname.data(), hostname.capacity());
memset(&hints, 0, sizeof hints);
hints.ai_family = AF_UNSPEC; /*either IPV4 or IPV6*/
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags = AI_CANONNAME;
if ( getaddrinfo(hostname.c_str(), "http", &hints, &info) == 0) {
for(p = info; p != NULL; p = p->ai_next) {
hostname = p->ai_canonname;
}
freeaddrinfo(info);
}
string::size_type pos = hostname.find(".");
while ( pos != string::npos )
{
hostname[pos] = '_';
pos = hostname.find(".", pos);
}
return hostname;
}
vector<string>& StringSplitTrim(const string& sData,
const string& sDelim, vector<string>& vItems)
{
vItems.clear();
string::size_type bpos = 0;
string::size_type epos = 0;
string::size_type nlen = sDelim.size();
while(sData.substr(epos,nlen) == sDelim)
{
epos += nlen;
}
bpos = epos;
while ((epos=sData.find(sDelim, epos)) != string::npos)
{
vItems.push_back(sData.substr(bpos, epos-bpos));
epos += nlen;
while(sData.substr(epos,nlen) == sDelim)
{
epos += nlen;
}
bpos = epos;
}
if(bpos != sData.size())
{
vItems.push_back(sData.substr(bpos, sData.size()-bpos));
}
return vItems;
}
int main(int argc, char *argv[])
{
FILE *net, *stat;
struct sysinfo si;
char line[256];
unsigned int user, nice, sys, idle, total, busy, old_total=0, old_busy=0;
if (argc != 3) {
printf( "Usage: %s host port\n"
"Eg: %s 127.0.0.1 8125\n",
argv[0], argv[0]);
exit(1);
}
signal(SIGHUP, SIG_IGN);
signal(SIGPIPE, SIG_IGN);
signal(SIGCHLD, SIG_IGN); /* will save one syscall per sleep */
signal(SIGTERM, sigterm);
if ( (net = fopen("/proc/net/dev", "r")) == NULL) {
perror("fopen");
exit(-1);
}
if ( (stat = fopen("/proc/stat", "r")) == NULL) {
perror("fopen");
exit(-1);
}
string ns = string("host.") + localhost().c_str() + ".";
statsd::StatsdClient client(argv[1], atoi(argv[2]), ns);
daemon(0,0);
printf("running in background.\n");
while(running) {
rewind(net);
vector<string> items;
while(!feof(net)) {
fgets(line, sizeof(line), net);
StringSplitTrim(line, " ", items);
if ( items.size() < 17 ) continue;
if ( items[0].find(":") == string::npos ) continue;
if ( items[1] == "0" and items[9] == "0" ) continue;
string netface = "network."+items[0].erase( items[0].find(":") );
client.count( netface+".receive.bytes", atoll(items[1].c_str()) );
client.count( netface+".receive.packets", atoll(items[2].c_str()) );
client.count( netface+".transmit.bytes", atoll(items[9].c_str()) );
client.count( netface+".transmit.packets", atoll(items[10].c_str()) );
}
sysinfo(&si);
client.gauge("system.load", 100*si.loads[0]/0x10000);
client.gauge("system.freemem", si.freeram/1024);
client.gauge("system.procs", si.procs);
client.count("system.uptime", si.uptime);
/* rewind doesn't do the trick for /proc/stat */
freopen("/proc/stat", "r", stat);
fgets(line, sizeof(line), stat);
sscanf(line, "cpu %u %u %u %u", &user, &nice, &sys, &idle);
total = user + sys + idle;
busy = user + sys;
client.send("system.cpu", 100 * (busy - old_busy)/(total - old_total), "g", 1.0);
old_total = total;
old_busy = busy;
sleep(6);
}
fclose(net);
fclose(stat);
exit(0);
}