Notes

#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sched.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <stdlib.h>
#include <string>
#include <string.h>
#include <fstream>
#include <iostream>
#include <sstream>

using namespace std;
int main ( int argc, char *argv[] )
{
int fd[2],fd1[2], nbytes , status=0;
pid_t childpid;
// char string[] = "Hello, world!n";
char readbuffer[80];
string fsource = argv[1];
string fdest = argv[2];
string filecontent="";
pipe(fd);
pid_t result=0;


if((childpid = fork()) == -1)
{
perror("fork");
exit(1);
}

if(childpid == 0)
{
/* Child process closes up input side of pipe */
close(fd[0]); ;


ifstream the_file( fsource.c_str() );
cout << "Reading Source file: " << fsource << "n";


// Always check to see if file opening succeeded
if ( !the_file.is_open() )
cout<<"Could not open filen";
else {
string x;
while (getline(the_file,x))
filecontent +=x;
cout << "File contents : " << filecontent << "n";
write(fd[1], filecontent.c_str(), (strlen(filecontent.c_str())+1));
the_file.close();
}

exit(0);
}
else
{
while (result==0)
result=waitpid(childpid, &status, WNOHANG);

cout << "Writing to dest: " << fdest << "n";
/* Parent process closes up output side of pipe */
close(fd[1]);
cout<<"Size of buffer read: " << sizeof(readbuffer) <<"n";
nbytes = read(fd[0], readbuffer, sizeof(readbuffer));
/* Read in a string from the pipe */
ofstream myfile (fdest.c_str());
myfile<<readbuffer;

myfile.close();
}

return(0);
}