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/*
* gethost.cc: The program that send a loadavg message to the DMUCS
* server periodically.
*
* Copyright (C) 2005, 2006 Victor T. Norman
*
* This program 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.
*
* 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 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
*/
#include "dmucs.h"
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <fstream>
#include <sys/types.h>
#include <unistd.h>
#include <stdio.h>
#include <string>
#include <sstream>
#include "COSMIC/HDR/sockets.h"
#include <time.h>
#include <sys/time.h>
#include <errno.h>
extern char **environ;
void usage(const char *prog);
void sleep();
bool debugMode = false;
int
main(int argc, char *argv[])
{
/*
* o Open a client socket to the server ip/port.
* o Send my IP address in a host request.
* o Read an IP address in a response.
* o Assign the value DISTCC_HOSTS to the IP address in the env.
* o Use execve to run the command passed in, with its args, on the
* command line.
* o Wait for the command to finish.
* o Close the client socket.
*/
/*
* Process command-line arguments.
*
* -s <server>, --server <server>: the name of the server machine.
* -p <port>, --port <port>: the port number to listen on (default: 6714).
* -t <distinguishing-type-str>: a string that indicates which type
* of host the compilation machine is.
* -D, --debug: debug mode (default: off)
*/
std::ostringstream serverName;
serverName << "@" << SERVER_MACH_NAME;
int serverPortNum = SERVER_PORT_NUM;
std::string distingProp = "";
for (int i = 1; i < argc; i++) {
if (strequ("-s", argv[i]) || strequ("--server", argv[i])) {
if (++i >= argc) {
usage(argv[0]);
return -1;
}
serverName.seekp(1); // remove everything after the first "@".
serverName << argv[i] << '\0';
} else if (strequ("-p", argv[i]) || strequ("--port", argv[i])) {
if (++i >= argc) {
usage(argv[0]);
return -1;
}
serverPortNum = atoi(argv[i]);
} else if (strequ("-t", argv[i]) || strequ("--type", argv[i])) {
if (++i >= argc) {
usage(argv[0]);
return -1;
}
distingProp = argv[i];
} else if (strequ("-D", argv[i]) || strequ("--debug", argv[i])) {
debugMode = true;
} else {
usage(argv[0]);
return -1;
}
}
std::ostringstream clientPortStr;
clientPortStr << "c" << serverPortNum;
char hostname[256];
if (gethostname(hostname, 256) < 0) {
fprintf(stderr, "Could not get my hostname\n");
return -1;
}
struct hostent *he = gethostbyname(hostname);
if (he == NULL) {
fprintf(stderr, "Could not get my hostname\n");
return -1;
}
struct in_addr in;
memcpy(&in.s_addr, he->h_addr_list[0], sizeof(in.s_addr));
while (1) {
DMUCS_DEBUG((stderr, "doing Sopen with %s, %s\n",
serverName.str().c_str(), clientPortStr.str().c_str()));
Socket *client_sock = Sopen((char *) serverName.str().c_str(),
(char *) clientPortStr.str().c_str());
if (!client_sock) {
fprintf(stderr, "Could not open client: %s\n", strerror(errno));
Sclose(client_sock);
sleep();
continue;
}
DMUCS_DEBUG((stderr, "got socket: %s\n", Sprtskt(client_sock)));
FILE *output = popen("uptime", "r");
if (output == NULL) {
fprintf(stderr, "Failed to get load avg\n");
Sclose(client_sock);
sleep();
continue;
}
char buf[1024];
char ldStr[32];
if (fgets(buf, 1024, output) == NULL) {
strcpy(ldStr," 0.0 0.0 0.0");
} else {
//char junk1[8];
float ldAvg1 = 0.0, ldAvg5 = 0.0, ldAvg10 = 0.0;
std::istringstream ist(buf);
std::string word;
bool found = false;
while (ist >> word) {
if (word == "average:" || word == "averages:") {
found = true;
break;
}
}
if (found) {
ist >> ldAvg1;
ist.get(); // eat the ','
ist >> ldAvg5;
ist.get(); // eat the ','
ist >> ldAvg10;
} else {
fprintf(stderr, "Couldn't read loadavg results -->%s<--\n",
buf);
}
sprintf(ldStr, " %2.2f %2.2f %2.2f", ldAvg1, ldAvg5, ldAvg10);
}
pclose(output);
std::string clientReqStr = "load " + std::string(inet_ntoa(in)) +
std::string(ldStr) + std::string(" ") + distingProp;
DMUCS_DEBUG((stderr, "Writing -->%s<-- to the server\n",
clientReqStr.c_str()));
Sputs((char *) clientReqStr.c_str(), client_sock);
Sclose(client_sock);
sleep();
}
}
void sleep()
{
struct timeval t = { 10L, 0L }; // 10 seconds.
select(0, NULL, NULL, NULL, &t);
}
void
usage(const char *prog)
{
fprintf(stderr, "Usage: %s [-s|--server <server>] [-p|--port <port>] "
"[-t|--type <str>] [-D|--debug]\n\n", prog);
}
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