#include <zinnia/spin.h>
#include <zinnia/syscall.h>
#include <zinnia/usercopy.h>
#include <config.h>
#include <uapi/utsname.h>

static struct spinlock uname_lock = {};

static struct utsname uname_buf = {
    .sysname = "Zinnia",
    .release = ZINNIA_VERSION,
    .version = CONFIG_KERNEL_FLAVOR,
    .nodename = "localhost",
    .machine = ZINNIA_ARCH,
};

struct syscall_ret sys_getuname(__user struct utsname* ptr) {
    struct syscall_ret ret = {};

    if (!ptr) {
        ret.errno = EINVAL;
        return ret;
    }

    spin_lock(&uname_lock);

    if (!usercopy_write(ptr, &uname_buf, sizeof(uname_buf)))
        ret.errno = EFAULT;

    spin_unlock(&uname_lock);

    return ret;
}