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//! Implementation of `std::os` functionality for teeos
use core::marker::PhantomData;
use crate::error::Error as StdError;
use crate::ffi::{OsStr, OsString};
use crate::fmt;
use crate::io;
use crate::path;
use crate::path::PathBuf;
use super::unsupported;
pub fn errno() -> i32 {
unsafe { (*libc::__errno_location()) as i32 }
}
// Hardcoded to return 4096, since `sysconf` is only implemented as a stub.
pub fn page_size() -> usize {
// unsafe { libc::sysconf(libc::_SC_PAGESIZE) as usize };
4096
}
// Everything below are stubs and copied from unsupported.rs
pub fn error_string(_errno: i32) -> String {
"error string unimplemented".to_string()
}
pub fn getcwd() -> io::Result<PathBuf> {
unsupported()
}
pub fn chdir(_: &path::Path) -> io::Result<()> {
unsupported()
}
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 on this platform yet".fmt(f)
}
}
impl StdError for JoinPathsError {
#[allow(deprecated)]
fn description(&self) -> &str {
"not supported on this platform yet"
}
}
pub fn current_exe() -> io::Result<PathBuf> {
unsupported()
}
pub struct Env(!);
impl Env {
// FIXME(https://github.com/rust-lang/rust/issues/114583): Remove this when <OsStr as Debug>::fmt matches <str as Debug>::fmt.
pub fn str_debug(&self) -> impl fmt::Debug + '_ {
let Self(inner) = self;
match *inner {}
}
}
impl fmt::Debug for Env {
fn fmt(&self, _: &mut fmt::Formatter<'_>) -> fmt::Result {
let Self(inner) = self;
match *inner {}
}
}
impl Iterator for Env {
type Item = (OsString, OsString);
fn next(&mut self) -> Option<(OsString, OsString)> {
let Self(inner) = self;
match *inner {}
}
}
pub fn env() -> Env {
panic!("not supported on this platform")
}
pub fn getenv(_: &OsStr) -> Option<OsString> {
None
}
pub fn setenv(_: &OsStr, _: &OsStr) -> io::Result<()> {
Err(io::Error::new(io::ErrorKind::Unsupported, "cannot set env vars on this platform"))
}
pub fn unsetenv(_: &OsStr) -> io::Result<()> {
Err(io::Error::new(io::ErrorKind::Unsupported, "cannot unset env vars on this platform"))
}
pub fn temp_dir() -> PathBuf {
panic!("no filesystem on this platform")
}
pub fn home_dir() -> Option<PathBuf> {
None
}
pub fn exit(_code: i32) -> ! {
panic!("TA should not call `exit`")
}
pub fn getpid() -> u32 {
panic!("no pids on this platform")
}
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