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cpprunner.cpp
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cpprunner.cpp
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#include <cstdio>
#include <cstdlib>
#include <ctime>
#include <iostream>
#include <string>
#include "sys/stat.h"
#include <sys/wait.h>
#include <unistd.h>
#include <fstream>
using namespace std;
const bool DEBUG = false;
const string binLocation = "/home/navn/bin/cppbins/";
int main(int argc, char *argv[]) {
for(int i=0;i<argc;i++)
if(DEBUG)
std::cout <<"input: " << argv[i]<<"\n";
struct stat scriptStatus, binStatus;
string scriptLocation = argv[1];
int slashIndex = scriptLocation.rfind('/');
string scriptName = scriptLocation;
if(slashIndex != string::npos) {
scriptName = scriptLocation.substr(slashIndex+1);
}
string binName = binLocation + scriptName;
if(stat(scriptLocation.c_str(), &scriptStatus)==-1) {
perror("stat");
exit(1);
}
int statRet = (stat(binName.c_str(), &binStatus));
if(statRet || scriptStatus.st_mtim.tv_sec > binStatus.st_mtim.tv_sec) {
string line;
ifstream readStream(scriptLocation.c_str());
string tempScriptDir = std::getenv("XDG_RUNTIME_DIR");
if(tempScriptDir.empty()) tempScriptDir = "/tmp/";
else if(tempScriptDir[tempScriptDir.size() - 1] != '/') tempScriptDir += '/';
string tempScript = tempScriptDir+"tmpscript.cpp";
ofstream writeStream(tempScript);
getline (readStream, line); //throw away the first line.
// Use a while loop together with the getline() function to read the file line by line
while (getline (readStream, line)) {
writeStream << line << '\n';
}
// Close the file
readStream.close();
writeStream.close();
int pid = fork();
if(pid == -1) {
perror("fork");
exit(1);
}
else if(pid == 0) {
//child process
execlp("g++", "g++","-O3" , "-o", binName.c_str(), tempScript.c_str(), NULL);
exit(1);
}
else {
//parent process
//wait for child to finish.
wait(NULL);
}
}
if(DEBUG)
cout << "binname" << binName <<'\n';
execvp(binName.c_str(), argv+1);
/* stat(filename.c_str(),&status); */
/* cout << status.st_mtim.tv_nsec; */
}