1 files changed, 402 insertions, 0 deletions
diff --git a/library/std/src/sys/hermit/fs.rs b/library/std/src/sys/hermit/fs.rs
new file mode 100644
index 00000000000..82ccab1462b
--- /dev/null
+++ b/library/std/src/sys/hermit/fs.rs
@@ -0,0 +1,402 @@
+use crate::ffi::{CStr, CString, OsString};
+use crate::fmt;
+use crate::hash::{Hash, Hasher};
+use crate::io::{self, Error, ErrorKind};
+use crate::io::{IoSlice, IoSliceMut, SeekFrom};
+use crate::path::{Path, PathBuf};
+use crate::sys::cvt;
+use crate::sys::hermit::abi;
+use crate::sys::hermit::abi::{O_APPEND, O_CREAT, O_EXCL, O_RDONLY, O_RDWR, O_TRUNC, O_WRONLY};
+use crate::sys::hermit::fd::FileDesc;
+use crate::sys::time::SystemTime;
+use crate::sys::{unsupported, Void};
+use crate::sys_common::os_str_bytes::OsStrExt;
+
+pub use crate::sys_common::fs::copy;
+//pub use crate::sys_common::fs::remove_dir_all;
+
+fn cstr(path: &Path) -> io::Result<CString> {
+    Ok(CString::new(path.as_os_str().as_bytes())?)
+}
+
+#[derive(Debug)]
+pub struct File(FileDesc);
+
+pub struct FileAttr(Void);
+
+pub struct ReadDir(Void);
+
+pub struct DirEntry(Void);
+
+#[derive(Clone, Debug)]
+pub struct OpenOptions {
+    // generic
+    read: bool,
+    write: bool,
+    append: bool,
+    truncate: bool,
+    create: bool,
+    create_new: bool,
+    // system-specific
+    mode: i32,
+}
+
+pub struct FilePermissions(Void);
+
+pub struct FileType(Void);
+
+#[derive(Debug)]
+pub struct DirBuilder {}
+
+impl FileAttr {
+    pub fn size(&self) -> u64 {
+        match self.0 {}
+    }
+
+    pub fn perm(&self) -> FilePermissions {
+        match self.0 {}
+    }
+
+    pub fn file_type(&self) -> FileType {
+        match self.0 {}
+    }
+
+    pub fn modified(&self) -> io::Result<SystemTime> {
+        match self.0 {}
+    }
+
+    pub fn accessed(&self) -> io::Result<SystemTime> {
+        match self.0 {}
+    }
+
+    pub fn created(&self) -> io::Result<SystemTime> {
+        match self.0 {}
+    }
+}
+
+impl Clone for FileAttr {
+    fn clone(&self) -> FileAttr {
+        match self.0 {}
+    }
+}
+
+impl FilePermissions {
+    pub fn readonly(&self) -> bool {
+        match self.0 {}
+    }
+
+    pub fn set_readonly(&mut self, _readonly: bool) {
+        match self.0 {}
+    }
+}
+
+impl Clone for FilePermissions {
+    fn clone(&self) -> FilePermissions {
+        match self.0 {}
+    }
+}
+
+impl PartialEq for FilePermissions {
+    fn eq(&self, _other: &FilePermissions) -> bool {
+        match self.0 {}
+    }
+}
+
+impl Eq for FilePermissions {}
+
+impl fmt::Debug for FilePermissions {
+    fn fmt(&self, _f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self.0 {}
+    }
+}
+
+impl FileType {
+    pub fn is_dir(&self) -> bool {
+        match self.0 {}
+    }
+
+    pub fn is_file(&self) -> bool {
+        match self.0 {}
+    }
+
+    pub fn is_symlink(&self) -> bool {
+        match self.0 {}
+    }
+}
+
+impl Clone for FileType {
+    fn clone(&self) -> FileType {
+        match self.0 {}
+    }
+}
+
+impl Copy for FileType {}
+
+impl PartialEq for FileType {
+    fn eq(&self, _other: &FileType) -> bool {
+        match self.0 {}
+    }
+}
+
+impl Eq for FileType {}
+
+impl Hash for FileType {
+    fn hash<H: Hasher>(&self, _h: &mut H) {
+        match self.0 {}
+    }
+}
+
+impl fmt::Debug for FileType {
+    fn fmt(&self, _f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self.0 {}
+    }
+}
+
+impl fmt::Debug for ReadDir {
+    fn fmt(&self, _f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self.0 {}
+    }
+}
+
+impl Iterator for ReadDir {
+    type Item = io::Result<DirEntry>;
+
+    fn next(&mut self) -> Option<io::Result<DirEntry>> {
+        match self.0 {}
+    }
+}
+
+impl DirEntry {
+    pub fn path(&self) -> PathBuf {
+        match self.0 {}
+    }
+
+    pub fn file_name(&self) -> OsString {
+        match self.0 {}
+    }
+
+    pub fn metadata(&self) -> io::Result<FileAttr> {
+        match self.0 {}
+    }
+
+    pub fn file_type(&self) -> io::Result<FileType> {
+        match self.0 {}
+    }
+}
+
+impl OpenOptions {
+    pub fn new() -> OpenOptions {
+        OpenOptions {
+            // generic
+            read: false,
+            write: false,
+            append: false,
+            truncate: false,
+            create: false,
+            create_new: false,
+            // system-specific
+            mode: 0x777,
+        }
+    }
+
+    pub fn read(&mut self, read: bool) {
+        self.read = read;
+    }
+    pub fn write(&mut self, write: bool) {
+        self.write = write;
+    }
+    pub fn append(&mut self, append: bool) {
+        self.append = append;
+    }
+    pub fn truncate(&mut self, truncate: bool) {
+        self.truncate = truncate;
+    }
+    pub fn create(&mut self, create: bool) {
+        self.create = create;
+    }
+    pub fn create_new(&mut self, create_new: bool) {
+        self.create_new = create_new;
+    }
+
+    fn get_access_mode(&self) -> io::Result<i32> {
+        match (self.read, self.write, self.append) {
+            (true, false, false) => Ok(O_RDONLY),
+            (false, true, false) => Ok(O_WRONLY),
+            (true, true, false) => Ok(O_RDWR),
+            (false, _, true) => Ok(O_WRONLY | O_APPEND),
+            (true, _, true) => Ok(O_RDWR | O_APPEND),
+            (false, false, false) => {
+                Err(io::Error::new(ErrorKind::InvalidInput, "invalid access mode"))
+            }
+        }
+    }
+
+    fn get_creation_mode(&self) -> io::Result<i32> {
+        match (self.write, self.append) {
+            (true, false) => {}
+            (false, false) => {
+                if self.truncate || self.create || self.create_new {
+                    return Err(io::Error::new(ErrorKind::InvalidInput, "invalid creation mode"));
+                }
+            }
+            (_, true) => {
+                if self.truncate && !self.create_new {
+                    return Err(io::Error::new(ErrorKind::InvalidInput, "invalid creation mode"));
+                }
+            }
+        }
+
+        Ok(match (self.create, self.truncate, self.create_new) {
+            (false, false, false) => 0,
+            (true, false, false) => O_CREAT,
+            (false, true, false) => O_TRUNC,
+            (true, true, false) => O_CREAT | O_TRUNC,
+            (_, _, true) => O_CREAT | O_EXCL,
+        })
+    }
+}
+
+impl File {
+    pub fn open(path: &Path, opts: &OpenOptions) -> io::Result<File> {
+        let path = cstr(path)?;
+        File::open_c(&path, opts)
+    }
+
+    pub fn open_c(path: &CStr, opts: &OpenOptions) -> io::Result<File> {
+        let mut flags = opts.get_access_mode()?;
+        flags = flags | opts.get_creation_mode()?;
+
+        let mode;
+        if flags & O_CREAT == O_CREAT {
+            mode = opts.mode;
+        } else {
+            mode = 0;
+        }
+
+        let fd = unsafe { cvt(abi::open(path.as_ptr(), flags, mode))? };
+        Ok(File(FileDesc::new(fd as i32)))
+    }
+
+    pub fn file_attr(&self) -> io::Result<FileAttr> {
+        Err(Error::from_raw_os_error(22))
+    }
+
+    pub fn fsync(&self) -> io::Result<()> {
+        Err(Error::from_raw_os_error(22))
+    }
+
+    pub fn datasync(&self) -> io::Result<()> {
+        self.fsync()
+    }
+
+    pub fn truncate(&self, _size: u64) -> io::Result<()> {
+        Err(Error::from_raw_os_error(22))
+    }
+
+    pub fn read(&self, buf: &mut [u8]) -> io::Result<usize> {
+        self.0.read(buf)
+    }
+
+    pub fn read_vectored(&self, bufs: &mut [IoSliceMut<'_>]) -> io::Result<usize> {
+        crate::io::default_read_vectored(|buf| self.read(buf), bufs)
+    }
+
+    #[inline]
+    pub fn is_read_vectored(&self) -> bool {
+        false
+    }
+
+    pub fn write(&self, buf: &[u8]) -> io::Result<usize> {
+        self.0.write(buf)
+    }
+
+    pub fn write_vectored(&self, bufs: &[IoSlice<'_>]) -> io::Result<usize> {
+        crate::io::default_write_vectored(|buf| self.write(buf), bufs)
+    }
+
+    #[inline]
+    pub fn is_write_vectored(&self) -> bool {
+        false
+    }
+
+    pub fn flush(&self) -> io::Result<()> {
+        Ok(())
+    }
+
+    pub fn seek(&self, _pos: SeekFrom) -> io::Result<u64> {
+        Err(Error::from_raw_os_error(22))
+    }
+
+    pub fn duplicate(&self) -> io::Result<File> {
+        Err(Error::from_raw_os_error(22))
+    }
+
+    pub fn set_permissions(&self, _perm: FilePermissions) -> io::Result<()> {
+        Err(Error::from_raw_os_error(22))
+    }
+
+    pub fn diverge(&self) -> ! {
+        loop {}
+    }
+}
+
+impl DirBuilder {
+    pub fn new() -> DirBuilder {
+        DirBuilder {}
+    }
+
+    pub fn mkdir(&self, _p: &Path) -> io::Result<()> {
+        unsupported()
+    }
+}
+
+pub fn readdir(_p: &Path) -> io::Result<ReadDir> {
+    unsupported()
+}
+
+pub fn unlink(path: &Path) -> io::Result<()> {
+    let name = cstr(path)?;
+    let _ = unsafe { cvt(abi::unlink(name.as_ptr()))? };
+    Ok(())
+}
+
+pub fn rename(_old: &Path, _new: &Path) -> io::Result<()> {
+    unsupported()
+}
+
+pub fn set_perm(_p: &Path, perm: FilePermissions) -> io::Result<()> {
+    match perm.0 {}
+}
+
+pub fn rmdir(_p: &Path) -> io::Result<()> {
+    unsupported()
+}
+
+pub fn remove_dir_all(_path: &Path) -> io::Result<()> {
+    //unsupported()
+    Ok(())
+}
+
+pub fn readlink(_p: &Path) -> io::Result<PathBuf> {
+    unsupported()
+}
+
+pub fn symlink(_src: &Path, _dst: &Path) -> io::Result<()> {
+    unsupported()
+}
+
+pub fn link(_src: &Path, _dst: &Path) -> io::Result<()> {
+    unsupported()
+}
+
+pub fn stat(_p: &Path) -> io::Result<FileAttr> {
+    unsupported()
+}
+
+pub fn lstat(_p: &Path) -> io::Result<FileAttr> {
+    unsupported()
+}
+
+pub fn canonicalize(_p: &Path) -> io::Result<PathBuf> {
+    unsupported()
+}