I give you a simplified example to explain what I would like to do. I have the following code, which I cannot modify (hello.cpp): |#include <iostream> #include <fstream> using namespace std; int main( int argc, char *argv[] ) { string line; ifstream f( argv[1] ); while(!f.eof()) { getline(f, line); cout << line << endl; } return 0; } Launch example: ||caneta@host ~ $ ./hello myfile.txt 1 - This is 2 - a test 3 - file. I have a wrapper program which I need to modify: ||#include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <iostream> #include <fstream> #include <sstream> using namespace std; int main () { int ret; ret = execl ("./hello", "./hello", "myfile.txt", (char *)0); return 0; }| In this way it works perfectly...but how can I modify it in order to use a stream or a string inside the wrapper program, instead of using a file name? I would like to have something like: |#include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <iostream> #include <fstream> #include <sstream> using namespace std; int main () { int ret; ifstream inputFile; inputFile << "1 - This is" << endl; inputFile << "2 - a test" << endl; inputFile << "3 - file." << endl; ret = execl ("./hello", "./hello", inputFile, (char *)0); return 0; }| This last example, of course, doesn't work...how can I modify it in order to make it work? Remember that I cannot modify hello.cpp... Can the Boost.iostreams help me? Thanks in advance. -- Alessandro Candini MEEO S.r.l. Via Saragat 9 I-44122 Ferrara, Italy Tel: +39 0532 1861501 Fax: +39 0532 1861637 http://www.meeo.it ======================================== "ATTENZIONE:le informazioni contenute in questo messaggio sono da considerarsi confidenziali ed il loro utilizzo è riservato unicamente al destinatario sopra indicato. Chi dovesse ricevere questo messaggio per errore è tenuto ad informare il mittente ed a rimuoverlo definitivamente da ogni supporto elettronico o cartaceo." "WARNING:This message contains confidential and/or proprietary information which may be subject to privilege or immunity and which is intended for use of its addressee only. Should you receive this message in error, you are kindly requested to inform the sender and to definitively remove it from any paper or electronic format."