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

void spawn_shell() {
    pid_t pid = fork();

    if (pid == 0) {
        char *argv[] = { "gmsh", NULL };
        char *envp[] = { "PATH=/bin", "HOME=/", "TERM=linux", NULL };
        execve("/bin/gmsh", argv, envp);
        
        perror("[init] Failed to exec gmsh");
        exit(1);
    } else if (pid > 0) {
        int status;
        waitpid(pid, &status, 0);
        fprintf(stdout, "[init] gmsh exited (status %d).\n", status);
    } else {
        perror("[init] fork failed");
    }
}

int main() {
    printf("[init] System Initializing...\n");

    if (mount("proc", "/proc", "proc", 0, NULL) != 0)
        perror("mount /proc");

    if (mount("sysfs", "/sys", "sysfs", 0, NULL) != 0)
        perror("mount /sys");

    // if (mount("devtmpfs", "/dev", "devtmpfs", 0, NULL) != 0)
    //     perror("mount /dev");

    mkdir("/tmp", 0777);
    if (mount("tmpfs", "/tmp", "tmpfs", 0, "mode=1777") != 0) {
        perror("[init] Failed to mount /tmp");
    }

    mkdir("/home", 0755);
    if (mount("/dev/sda2", "/home", "ext4", 0, NULL) != 0) {
        perror("[init] Failed to mount /home");
    }

    while (1) spawn_shell();
    
    return 0;
}