1 files changed, 483 insertions, 0 deletions
diff --git a/ctr-std/src/sys/redox/fs.rs b/ctr-std/src/sys/redox/fs.rs
new file mode 100644
index 0000000..2e22161
--- /dev/null
+++ b/ctr-std/src/sys/redox/fs.rs
@@ -0,0 +1,483 @@
+// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use os::unix::prelude::*;
+
+use ffi::{OsString, OsStr};
+use fmt;
+use io::{self, Error, ErrorKind, SeekFrom};
+use path::{Path, PathBuf};
+use sync::Arc;
+use sys::fd::FileDesc;
+use sys::time::SystemTime;
+use sys::{cvt, syscall};
+use sys_common::{AsInner, FromInner};
+
+pub struct File(FileDesc);
+
+#[derive(Clone)]
+pub struct FileAttr {
+    stat: syscall::Stat,
+}
+
+pub struct ReadDir {
+    data: Vec<u8>,
+    i: usize,
+    root: Arc<PathBuf>,
+}
+
+struct Dir(FileDesc);
+
+unsafe impl Send for Dir {}
+unsafe impl Sync for Dir {}
+
+pub struct DirEntry {
+    root: Arc<PathBuf>,
+    name: Box<[u8]>
+}
+
+#[derive(Clone, Debug)]
+pub struct OpenOptions {
+    // generic
+    read: bool,
+    write: bool,
+    append: bool,
+    truncate: bool,
+    create: bool,
+    create_new: bool,
+    // system-specific
+    custom_flags: i32,
+    mode: u16,
+}
+
+#[derive(Clone, PartialEq, Eq, Debug)]
+pub struct FilePermissions { mode: u16 }
+
+#[derive(Copy, Clone, PartialEq, Eq, Hash, Debug)]
+pub struct FileType { mode: u16 }
+
+#[derive(Debug)]
+pub struct DirBuilder { mode: u16 }
+
+impl FileAttr {
+    pub fn size(&self) -> u64 { self.stat.st_size as u64 }
+    pub fn perm(&self) -> FilePermissions {
+        FilePermissions { mode: (self.stat.st_mode as u16) & 0o777 }
+    }
+
+    pub fn file_type(&self) -> FileType {
+        FileType { mode: self.stat.st_mode as u16 }
+    }
+}
+
+impl FileAttr {
+    pub fn modified(&self) -> io::Result<SystemTime> {
+        Ok(SystemTime::from(syscall::TimeSpec {
+            tv_sec: self.stat.st_mtime as i64,
+            tv_nsec: self.stat.st_mtime_nsec as i32,
+        }))
+    }
+
+    pub fn accessed(&self) -> io::Result<SystemTime> {
+        Ok(SystemTime::from(syscall::TimeSpec {
+            tv_sec: self.stat.st_atime as i64,
+            tv_nsec: self.stat.st_atime_nsec as i32,
+        }))
+    }
+
+    pub fn created(&self) -> io::Result<SystemTime> {
+        Ok(SystemTime::from(syscall::TimeSpec {
+            tv_sec: self.stat.st_ctime as i64,
+            tv_nsec: self.stat.st_ctime_nsec as i32,
+        }))
+    }
+}
+
+impl AsInner<syscall::Stat> for FileAttr {
+    fn as_inner(&self) -> &syscall::Stat { &self.stat }
+}
+
+impl FilePermissions {
+    pub fn readonly(&self) -> bool { self.mode & 0o222 == 0 }
+    pub fn set_readonly(&mut self, readonly: bool) {
+        if readonly {
+            self.mode &= !0o222;
+        } else {
+            self.mode |= 0o222;
+        }
+    }
+    pub fn mode(&self) -> u32 { self.mode as u32 }
+}
+
+impl FileType {
+    pub fn is_dir(&self) -> bool { self.is(syscall::MODE_DIR) }
+    pub fn is_file(&self) -> bool { self.is(syscall::MODE_FILE) }
+    pub fn is_symlink(&self) -> bool { self.is(syscall::MODE_SYMLINK) }
+
+    pub fn is(&self, mode: u16) -> bool {
+        self.mode & syscall::MODE_TYPE == mode
+    }
+}
+
+impl FromInner<u32> for FilePermissions {
+    fn from_inner(mode: u32) -> FilePermissions {
+        FilePermissions { mode: mode as u16 }
+    }
+}
+
+impl fmt::Debug for ReadDir {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        // This will only be called from std::fs::ReadDir, which will add a "ReadDir()" frame.
+        // Thus the result will be e g 'ReadDir("/home")'
+        fmt::Debug::fmt(&*self.root, f)
+    }
+}
+
+impl Iterator for ReadDir {
+    type Item = io::Result<DirEntry>;
+
+    fn next(&mut self) -> Option<io::Result<DirEntry>> {
+        loop {
+            let start = self.i;
+            let mut i = self.i;
+            while i < self.data.len() {
+                self.i += 1;
+                if self.data[i] == b'\n' {
+                    break;
+                }
+                i += 1;
+            }
+            if start < self.i {
+                let ret = DirEntry {
+                    name: self.data[start .. i].to_owned().into_boxed_slice(),
+                    root: self.root.clone()
+                };
+                if ret.name_bytes() != b"." && ret.name_bytes() != b".." {
+                    return Some(Ok(ret))
+                }
+            } else {
+                return None;
+            }
+        }
+    }
+}
+
+impl DirEntry {
+    pub fn path(&self) -> PathBuf {
+        self.root.join(OsStr::from_bytes(self.name_bytes()))
+    }
+
+    pub fn file_name(&self) -> OsString {
+        OsStr::from_bytes(self.name_bytes()).to_os_string()
+    }
+
+    pub fn metadata(&self) -> io::Result<FileAttr> {
+        lstat(&self.path())
+    }
+
+    pub fn file_type(&self) -> io::Result<FileType> {
+        lstat(&self.path()).map(|m| m.file_type())
+    }
+
+    fn name_bytes(&self) -> &[u8] {
+        &*self.name
+    }
+}
+
+impl OpenOptions {
+    pub fn new() -> OpenOptions {
+        OpenOptions {
+            // generic
+            read: false,
+            write: false,
+            append: false,
+            truncate: false,
+            create: false,
+            create_new: false,
+            // system-specific
+            custom_flags: 0,
+            mode: 0o666,
+        }
+    }
+
+    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; }
+
+    pub fn custom_flags(&mut self, flags: i32) { self.custom_flags = flags; }
+    pub fn mode(&mut self, mode: u32) { self.mode = mode as u16; }
+
+    fn get_access_mode(&self) -> io::Result<usize> {
+        match (self.read, self.write, self.append) {
+            (true,  false, false) => Ok(syscall::O_RDONLY),
+            (false, true,  false) => Ok(syscall::O_WRONLY),
+            (true,  true,  false) => Ok(syscall::O_RDWR),
+            (false, _,     true)  => Ok(syscall::O_WRONLY | syscall::O_APPEND),
+            (true,  _,     true)  => Ok(syscall::O_RDWR | syscall::O_APPEND),
+            (false, false, false) => Err(Error::from_raw_os_error(syscall::EINVAL)),
+        }
+    }
+
+    fn get_creation_mode(&self) -> io::Result<usize> {
+        match (self.write, self.append) {
+            (true, false) => {}
+            (false, false) =>
+                if self.truncate || self.create || self.create_new {
+                    return Err(Error::from_raw_os_error(syscall::EINVAL));
+                },
+            (_, true) =>
+                if self.truncate && !self.create_new {
+                    return Err(Error::from_raw_os_error(syscall::EINVAL));
+                },
+        }
+
+        Ok(match (self.create, self.truncate, self.create_new) {
+                (false, false, false) => 0,
+                (true,  false, false) => syscall::O_CREAT,
+                (false, true,  false) => syscall::O_TRUNC,
+                (true,  true,  false) => syscall::O_CREAT | syscall::O_TRUNC,
+                (_,      _,    true)  => syscall::O_CREAT | syscall::O_EXCL,
+           })
+    }
+}
+
+impl File {
+    pub fn open(path: &Path, opts: &OpenOptions) -> io::Result<File> {
+        let flags = syscall::O_CLOEXEC |
+                    opts.get_access_mode()? as usize |
+                    opts.get_creation_mode()? as usize |
+                    (opts.custom_flags as usize & !syscall::O_ACCMODE);
+        let fd = cvt(syscall::open(path.to_str().unwrap(), flags | opts.mode as usize))?;
+        Ok(File(FileDesc::new(fd)))
+    }
+
+    pub fn file_attr(&self) -> io::Result<FileAttr> {
+        let mut stat = syscall::Stat::default();
+        cvt(syscall::fstat(self.0.raw(), &mut stat))?;
+        Ok(FileAttr { stat: stat })
+    }
+
+    pub fn fsync(&self) -> io::Result<()> {
+        cvt(syscall::fsync(self.0.raw()))?;
+        Ok(())
+    }
+
+    pub fn datasync(&self) -> io::Result<()> {
+        self.fsync()
+    }
+
+    pub fn truncate(&self, size: u64) -> io::Result<()> {
+        cvt(syscall::ftruncate(self.0.raw(), size as usize))?;
+        Ok(())
+    }
+
+    pub fn read(&self, buf: &mut [u8]) -> io::Result<usize> {
+        self.0.read(buf)
+    }
+
+    pub fn write(&self, buf: &[u8]) -> io::Result<usize> {
+        self.0.write(buf)
+    }
+
+    pub fn flush(&self) -> io::Result<()> { Ok(()) }
+
+    pub fn seek(&self, pos: SeekFrom) -> io::Result<u64> {
+        let (whence, pos) = match pos {
+            // Casting to `i64` is fine, too large values will end up as
+            // negative which will cause an error in `lseek64`.
+            SeekFrom::Start(off) => (syscall::SEEK_SET, off as i64),
+            SeekFrom::End(off) => (syscall::SEEK_END, off),
+            SeekFrom::Current(off) => (syscall::SEEK_CUR, off),
+        };
+        let n = cvt(syscall::lseek(self.0.raw(), pos as isize, whence))?;
+        Ok(n as u64)
+    }
+
+    pub fn duplicate(&self) -> io::Result<File> {
+        self.0.duplicate().map(File)
+    }
+
+    pub fn dup(&self, buf: &[u8]) -> io::Result<File> {
+        let fd = cvt(syscall::dup(*self.fd().as_inner() as usize, buf))?;
+        Ok(File(FileDesc::new(fd)))
+    }
+
+    pub fn set_permissions(&self, perm: FilePermissions) -> io::Result<()> {
+        set_perm(&self.path()?, perm)
+    }
+
+    pub fn path(&self) -> io::Result<PathBuf> {
+        let mut buf: [u8; 4096] = [0; 4096];
+        let count = cvt(syscall::fpath(*self.fd().as_inner() as usize, &mut buf))?;
+        Ok(PathBuf::from(unsafe { String::from_utf8_unchecked(Vec::from(&buf[..count])) }))
+    }
+
+    pub fn fd(&self) -> &FileDesc { &self.0 }
+
+    pub fn into_fd(self) -> FileDesc { self.0 }
+}
+
+impl DirBuilder {
+    pub fn new() -> DirBuilder {
+        DirBuilder { mode: 0o777 }
+    }
+
+    pub fn mkdir(&self, p: &Path) -> io::Result<()> {
+        let flags = syscall::O_CREAT | syscall::O_CLOEXEC | syscall::O_DIRECTORY | syscall::O_EXCL;
+        let fd = cvt(syscall::open(p.to_str().unwrap(), flags | (self.mode as usize & 0o777)))?;
+        let _ = syscall::close(fd);
+        Ok(())
+    }
+
+    pub fn set_mode(&mut self, mode: u32) {
+        self.mode = mode as u16;
+    }
+}
+
+impl FromInner<usize> for File {
+    fn from_inner(fd: usize) -> File {
+        File(FileDesc::new(fd))
+    }
+}
+
+impl fmt::Debug for File {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        let mut b = f.debug_struct("File");
+        b.field("fd", &self.0.raw());
+        if let Ok(path) = self.path() {
+            b.field("path", &path);
+        }
+        /*
+        if let Some((read, write)) = get_mode(fd) {
+            b.field("read", &read).field("write", &write);
+        }
+        */
+        b.finish()
+    }
+}
+
+pub fn readdir(p: &Path) -> io::Result<ReadDir> {
+    let root = Arc::new(p.to_path_buf());
+
+    let flags = syscall::O_CLOEXEC | syscall::O_RDONLY | syscall::O_DIRECTORY;
+    let fd = cvt(syscall::open(p.to_str().unwrap(), flags))?;
+    let file = FileDesc::new(fd);
+    let mut data = Vec::new();
+    file.read_to_end(&mut data)?;
+
+    Ok(ReadDir { data: data, i: 0, root: root })
+}
+
+pub fn unlink(p: &Path) -> io::Result<()> {
+    cvt(syscall::unlink(p.to_str().unwrap()))?;
+    Ok(())
+}
+
+pub fn rename(old: &Path, new: &Path) -> io::Result<()> {
+    let fd = cvt(syscall::open(old.to_str().unwrap(),
+                               syscall::O_CLOEXEC | syscall::O_STAT | syscall::O_NOFOLLOW))?;
+    let res = cvt(syscall::frename(fd, new.to_str().unwrap()));
+    cvt(syscall::close(fd))?;
+    res?;
+    Ok(())
+}
+
+pub fn set_perm(p: &Path, perm: FilePermissions) -> io::Result<()> {
+    cvt(syscall::chmod(p.to_str().unwrap(), perm.mode as usize))?;
+    Ok(())
+}
+
+pub fn rmdir(p: &Path) -> io::Result<()> {
+    cvt(syscall::rmdir(p.to_str().unwrap()))?;
+    Ok(())
+}
+
+pub fn remove_dir_all(path: &Path) -> io::Result<()> {
+    let filetype = lstat(path)?.file_type();
+    if filetype.is_symlink() {
+        unlink(path)
+    } else {
+        remove_dir_all_recursive(path)
+    }
+}
+
+fn remove_dir_all_recursive(path: &Path) -> io::Result<()> {
+    for child in readdir(path)? {
+        let child = child?;
+        if child.file_type()?.is_dir() {
+            remove_dir_all_recursive(&child.path())?;
+        } else {
+            unlink(&child.path())?;
+        }
+    }
+    rmdir(path)
+}
+
+pub fn readlink(p: &Path) -> io::Result<PathBuf> {
+    let fd = cvt(syscall::open(p.to_str().unwrap(),
+                               syscall::O_CLOEXEC | syscall::O_SYMLINK | syscall::O_RDONLY))?;
+    let mut buf: [u8; 4096] = [0; 4096];
+    let res = cvt(syscall::read(fd, &mut buf));
+    cvt(syscall::close(fd))?;
+    let count = res?;
+    Ok(PathBuf::from(unsafe { String::from_utf8_unchecked(Vec::from(&buf[..count])) }))
+}
+
+pub fn symlink(src: &Path, dst: &Path) -> io::Result<()> {
+    let fd = cvt(syscall::open(dst.to_str().unwrap(),
+                               syscall::O_CLOEXEC | syscall::O_SYMLINK |
+                               syscall::O_CREAT | syscall::O_WRONLY | 0o777))?;
+    let res = cvt(syscall::write(fd, src.to_str().unwrap().as_bytes()));
+    cvt(syscall::close(fd))?;
+    res?;
+    Ok(())
+}
+
+pub fn link(_src: &Path, _dst: &Path) -> io::Result<()> {
+    Err(Error::from_raw_os_error(syscall::ENOSYS))
+}
+
+pub fn stat(p: &Path) -> io::Result<FileAttr> {
+    let fd = cvt(syscall::open(p.to_str().unwrap(), syscall::O_CLOEXEC | syscall::O_STAT))?;
+    let file = File(FileDesc::new(fd));
+    file.file_attr()
+}
+
+pub fn lstat(p: &Path) -> io::Result<FileAttr> {
+    let fd = cvt(syscall::open(p.to_str().unwrap(),
+                               syscall::O_CLOEXEC | syscall::O_STAT | syscall::O_NOFOLLOW))?;
+    let file = File(FileDesc::new(fd));
+    file.file_attr()
+}
+
+pub fn canonicalize(p: &Path) -> io::Result<PathBuf> {
+    let fd = cvt(syscall::open(p.to_str().unwrap(), syscall::O_CLOEXEC | syscall::O_STAT))?;
+    let file = File(FileDesc::new(fd));
+    file.path()
+}
+
+pub fn copy(from: &Path, to: &Path) -> io::Result<u64> {
+    use fs::{File, set_permissions};
+    if !from.is_file() {
+        return Err(Error::new(ErrorKind::InvalidInput,
+                              "the source path is not an existing regular file"))
+    }
+
+    let mut reader = File::open(from)?;
+    let mut writer = File::create(to)?;
+    let perm = reader.metadata()?.permissions();
+
+    let ret = io::copy(&mut reader, &mut writer)?;
+    set_permissions(to, perm)?;
+    Ok(ret)
+}