Processus: fork()

Version C

#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
#include <sys/wait.h>
#include <stdlib.h>

int main(int argc, char *argv[])
{
    pid_t pid;

    pid = fork();
    if (pid == -1) {
        perror("erreur fork");
        exit(EXIT_FAILURE);
    }
	if (pid == 0) { 
        /* Processus fils */
        printf("Hello from child process with pid: %d and parent pid: %d\n",
            getpid(),
            getppid()
        );
	} else {
    	while (pid != wait(0));
        /* Processus pere */
        printf("Hello from parent process with pid: %d and child pid: %d\n",
            getpid(),
            pid
        );
    }
    exit(EXIT_SUCCESS);
}

Version Rust

use nix::sys::wait::wait;
use nix::unistd::ForkResult::{Child, Parent};
use nix::unistd::{fork, getpid, getppid};


fn main() {
    let pid = fork();

    match pid.expect("Fork Failed: Unable to create child process!") {
        Child => println!(
            "Hello from child process with pid: {} and parent pid:{}",
            getpid(),
            getppid()
        ),
        Parent { child } => {
            wait();
            println!(
                "Hello from parent process with pid: {} and child pid:{}",
                getpid(),
                child
            );
        }
    }
}