Luna/apps/src/init.c

#include <fcntl.h>
#include <luna.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/syscall.h>
#include <unistd.h>

typedef long ssize_t;

int main()
{
    if (gettid() == 0) // why are we the idle task?
    {
        __luna_abort("SHENANIGANS! init is tid 0 (which is reserved for the idle task)\n");
    }

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

    printf("Running as tid %ld\n\n", gettid());

    sleep(1);

    char version[40];
    syscall(SYS_getversion, version, sizeof(version));

    printf("Your kernel version is %s\n\n", version);

    sleep(2);

    const char* filename = "/sys/config";

    printf("Opening %s for reading...\n", filename);

    int fd = open(filename, O_RDONLY);
    if (fd < 0)
    {
        perror("open");
        // return 1;
    }

    char buf[4096];

    ssize_t nread = read(fd, buf, sizeof(buf));
    if (nread < 0)
    {
        perror("read");
        // return 1;
    }
    else
    {
        buf[nread] = 0;

        printf("Read %zd bytes\n\n", nread);

        printf("%s", buf);
    }

    if (close(fd) < 0)
    {
        perror("close");
        // return 1;
    }

    printf("\n\nPress any key to restart.\n");

    return 0;
}