cin

#define MSGC "Mesaj copil"
#define MSGP "Mesaj parinte"

void login() {
    pid_t childPID = fork();
    int sockp[2];
    static const int ps = 0; // parent socker
    static const int cs = 1; // child socket

    char usr[64], psd[64];

    if (socketpair(AF_UNIX, SOCK_STREAM, 0, sockp) < 0)  {
        perror("Err... socketpair");
        exit(1);
    }

    if(childPID < 0){
        perror("Nu pot fork()\n");
        exit(1);

    }
    else if(childPID == 0) { // Copil

        if (read(sockp[cs], usr, sizeof(usr)) < 0) perror("[C] Error read(): ");
        printf("Procesul cu PID %d (c) a primit '%s'\n", getpid(), usr);
        if (write(sockp[cs], MSGC, sizeof(MSGC)) < 0) perror("[C] Error write(): ");

        close(sockp[cs]);

    }
    else { // Parinte

        if(write(sockp[ps], MSGP, sizeof(MSGP)) < 0) perror("[P]Error: write()");
        if(read(sockp[ps], usr, 64) < 0) perror("[P] Error read(): ");

        printf("Procesul cu PID %d(p) a primit %s\n", getpid(), usr);

        close(sockp[ps]);
    }
}