Luna/apps/src/init.c

#include <luna.h>
#include <stdio.h>
#include <sys/wait.h>
#include <unistd.h>

int main()
{
    if (getpid() != 1)
    {
        fprintf(stderr, "init should be started as PID 1\n");
        return 1;
    }

    printf("Welcome to Luna!\n\n");

    msleep(200);

    pid_t child = fork();
    if (child < 0)
    {
        perror("fork");
        return 1;
    }
    if (child == 0)
    {
        execv("/bin/sh", NULL);
        perror("execv");
        return 1;
    }

    pid_t result;

    for (;;)
    {
        while ((result = wait(NULL)) == 0) // No child has exited yet
        {
            msleep(100);
        }
        if (result == child) { return 0; }
    }
}