change argv[0] after fork

can someone tell me how can I change the name of a process after a for();
normally it's done by changing argv[0], but how should it be done in a new process ?

I'd suppose that it should work the same way in the new process as it does in the old process. The forked process gets its own copy of argv[].

Maybe you could do something like this

Code:

#include <stdio.h>

int main(int argc, char *argv[])
{
    argv[0] = "vvvv";
    
    printf("%s\n", argv[0]);    
 
    return 0;
}