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use crate::collections::HashMap;
use crate::error::Error as StdError;
use crate::ffi::{CStr, OsStr, OsString};
use crate::fmt;
use crate::io;
use crate::marker::PhantomData;
use crate::os::hermit::ffi::OsStringExt;
use crate::path::{self, PathBuf};
use crate::str;
use crate::sync::Mutex;
use crate::sys::hermit::abi;
use crate::sys::memchr;
use crate::sys::unsupported;
use crate::vec;
pub fn errno() -> i32 {
0
}
pub fn error_string(_errno: i32) -> String {
"operation successful".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 hermit yet".fmt(f)
}
}
impl StdError for JoinPathsError {
#[allow(deprecated)]
fn description(&self) -> &str {
"not supported on hermit yet"
}
}
pub fn current_exe() -> io::Result<PathBuf> {
unsupported()
}
static mut ENV: Option<Mutex<HashMap<OsString, OsString>>> = None;
pub fn init_environment(env: *const *const i8) {
unsafe {
ENV = Some(Mutex::new(HashMap::new()));
if env.is_null() {
return;
}
let mut guard = ENV.as_ref().unwrap().lock().unwrap();
let mut environ = env;
while !(*environ).is_null() {
if let Some((key, value)) = parse(CStr::from_ptr(*environ).to_bytes()) {
guard.insert(key, value);
}
environ = environ.add(1);
}
}
fn parse(input: &[u8]) -> Option<(OsString, OsString)> {
// Strategy (copied from glibc): Variable name and value are separated
// by an ASCII equals sign '='. Since a variable name must not be
// empty, allow variable names starting with an equals sign. Skip all
// malformed lines.
if input.is_empty() {
return None;
}
let pos = memchr::memchr(b'=', &input[1..]).map(|p| p + 1);
pos.map(|p| {
(
OsStringExt::from_vec(input[..p].to_vec()),
OsStringExt::from_vec(input[p + 1..].to_vec()),
)
})
}
}
pub struct Env {
iter: vec::IntoIter<(OsString, OsString)>,
}
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()
}
}
/// Returns a vector of (variable, value) byte-vector pairs for all the
/// environment variables of the current process.
pub fn env() -> Env {
unsafe {
let guard = ENV.as_ref().unwrap().lock().unwrap();
let mut result = Vec::new();
for (key, value) in guard.iter() {
result.push((key.clone(), value.clone()));
}
return Env { iter: result.into_iter() };
}
}
pub fn getenv(k: &OsStr) -> Option<OsString> {
unsafe { ENV.as_ref().unwrap().lock().unwrap().get_mut(k).cloned() }
}
pub fn setenv(k: &OsStr, v: &OsStr) -> io::Result<()> {
unsafe {
let (k, v) = (k.to_owned(), v.to_owned());
ENV.as_ref().unwrap().lock().unwrap().insert(k, v);
}
Ok(())
}
pub fn unsetenv(k: &OsStr) -> io::Result<()> {
unsafe {
ENV.as_ref().unwrap().lock().unwrap().remove(k);
}
Ok(())
}
pub fn temp_dir() -> PathBuf {
panic!("no filesystem on hermit")
}
pub fn home_dir() -> Option<PathBuf> {
None
}
pub fn exit(code: i32) -> ! {
unsafe {
abi::exit(code);
}
}
pub fn getpid() -> u32 {
unsafe { abi::getpid() }
}
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