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use fortanix_sgx_abi::{Error, RESULT_SUCCESS};
use crate::collections::HashMap;
use crate::error::Error as StdError;
use crate::ffi::{OsStr, OsString};
use crate::fmt;
use crate::io;
use crate::marker::PhantomData;
use crate::path::{self, PathBuf};
use crate::str;
use crate::sync::atomic::{AtomicUsize, Ordering};
use crate::sync::Mutex;
use crate::sync::Once;
use crate::sys::{decode_error_kind, sgx_ineffective, unsupported};
use crate::vec;
pub fn errno() -> i32 {
RESULT_SUCCESS
}
pub fn error_string(errno: i32) -> String {
if errno == RESULT_SUCCESS {
"operation successful".into()
} else if ((Error::UserRangeStart as _)..=(Error::UserRangeEnd as _)).contains(&errno) {
format!("user-specified error {errno:08x}")
} else {
decode_error_kind(errno).as_str().into()
}
}
pub fn getcwd() -> io::Result<PathBuf> {
unsupported()
}
pub fn chdir(_: &path::Path) -> io::Result<()> {
sgx_ineffective(())
}
pub struct SplitPaths<'a>(!, PhantomData<&'a ()>);
pub fn split_paths(_unparsed: &OsStr) -> SplitPaths<'_> {
panic!("unsupported")
}
impl<'a> Iterator for SplitPaths<'a> {
type Item = PathBuf;
fn next(&mut self) -> Option<PathBuf> {
self.0
}
}
#[derive(Debug)]
pub struct JoinPathsError;
pub fn join_paths<I, T>(_paths: I) -> Result<OsString, JoinPathsError>
where
I: Iterator<Item = T>,
T: AsRef<OsStr>,
{
Err(JoinPathsError)
}
impl fmt::Display for JoinPathsError {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
"not supported in SGX yet".fmt(f)
}
}
impl StdError for JoinPathsError {
#[allow(deprecated)]
fn description(&self) -> &str {
"not supported in SGX yet"
}
}
pub fn current_exe() -> io::Result<PathBuf> {
unsupported()
}
#[cfg_attr(test, linkage = "available_externally")]
#[export_name = "_ZN16__rust_internals3std3sys3sgx2os3ENVE"]
static ENV: AtomicUsize = AtomicUsize::new(0);
#[cfg_attr(test, linkage = "available_externally")]
#[export_name = "_ZN16__rust_internals3std3sys3sgx2os8ENV_INITE"]
static ENV_INIT: Once = Once::new();
type EnvStore = Mutex<HashMap<OsString, OsString>>;
fn get_env_store() -> Option<&'static EnvStore> {
unsafe { (ENV.load(Ordering::Relaxed) as *const EnvStore).as_ref() }
}
fn create_env_store() -> &'static EnvStore {
ENV_INIT.call_once(|| {
ENV.store(Box::into_raw(Box::new(EnvStore::default())) as _, Ordering::Relaxed)
});
unsafe { &*(ENV.load(Ordering::Relaxed) as *const EnvStore) }
}
pub struct Env {
iter: vec::IntoIter<(OsString, OsString)>,
}
// FIXME(https://github.com/rust-lang/rust/issues/114583): Remove this when <OsStr as Debug>::fmt matches <str as Debug>::fmt.
pub struct EnvStrDebug<'a> {
slice: &'a [(OsString, OsString)],
}
impl fmt::Debug for EnvStrDebug<'_> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let Self { slice } = self;
f.debug_list()
.entries(slice.iter().map(|(a, b)| (a.to_str().unwrap(), b.to_str().unwrap())))
.finish()
}
}
impl Env {
pub fn str_debug(&self) -> impl fmt::Debug + '_ {
let Self { iter } = self;
EnvStrDebug { slice: iter.as_slice() }
}
}
impl fmt::Debug for Env {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let Self { iter } = self;
f.debug_list().entries(iter.as_slice()).finish()
}
}
impl !Send for Env {}
impl !Sync for Env {}
impl Iterator for Env {
type Item = (OsString, OsString);
fn next(&mut self) -> Option<(OsString, OsString)> {
self.iter.next()
}
fn size_hint(&self) -> (usize, Option<usize>) {
self.iter.size_hint()
}
}
pub fn env() -> Env {
let clone_to_vec = |map: &HashMap<OsString, OsString>| -> Vec<_> {
map.iter().map(|(k, v)| (k.clone(), v.clone())).collect()
};
let iter = get_env_store()
.map(|env| clone_to_vec(&env.lock().unwrap()))
.unwrap_or_default()
.into_iter();
Env { iter }
}
pub fn getenv(k: &OsStr) -> Option<OsString> {
get_env_store().and_then(|s| s.lock().unwrap().get(k).cloned())
}
pub fn setenv(k: &OsStr, v: &OsStr) -> io::Result<()> {
let (k, v) = (k.to_owned(), v.to_owned());
create_env_store().lock().unwrap().insert(k, v);
Ok(())
}
pub fn unsetenv(k: &OsStr) -> io::Result<()> {
if let Some(env) = get_env_store() {
env.lock().unwrap().remove(k);
}
Ok(())
}
pub fn temp_dir() -> PathBuf {
panic!("no filesystem in SGX")
}
pub fn home_dir() -> Option<PathBuf> {
None
}
pub fn exit(code: i32) -> ! {
super::abi::exit_with_code(code as _)
}
pub fn getpid() -> u32 {
panic!("no pids in SGX")
}
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