#include <stdio.h>
#include <stdint.h>

typedef struct {
    uint32_t uid;
    const char *username;
} Identity;

void attach_identity(Identity *id, uint32_t uid, const char *name) {
    id->uid = uid;
    id->username = name;
}

int main(void) {
    Identity login_id;
    printf("=== OS Authentication Simulation ===\n");
    printf("User attempts login...\n");
    /* Simulated successful authentication */
    attach_identity(&login_id, 1000, "alice");
    printf("Authenticated: UID=%u, User=%s\n", login_id.uid, login_id.username);
    printf("Creating initial process (shell) with attached identity.\n");
    printf("Forking child process for command execution.\n");
    printf("Child inherits UID=%u from parent.\n", login_id.uid);
    printf("Security policy can now be applied based on this identity.\n");
    return 0;
}