static int ext4dev_image(const void *buf, unsigned long long *bytes)
{
int ret, test_fs, ext4dev_present, ext4_present;
ret = base_ext4_image(buf, bytes, &test_fs);
if (ret == 0)
return 0;
ext4dev_present = (fs_proc_check("ext4dev") ||
check_for_modules("ext4dev"));
ext4_present = (fs_proc_check("ext4") || check_for_modules("ext4"));
if ((!test_fs || !ext4dev_present) && ext4_present)
return 0;
return 1;
}
static int system_supports_ext4dev(void)
{
static time_t last_check = 0;
static int ret = -1;
time_t now = time(0);
if (ret != -1 || (now - last_check) < 5)
return ret;
last_check = now;
ret = (fs_proc_check("ext4dev") || check_for_modules("ext4dev"));
return ret;
}