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// copies from linuxx
use crate::ffi::{CString, CStr, OsString, OsStr};
use crate::sys::vxworks::ext::ffi::OsStrExt;
use crate::fmt;
use crate::io::{self, Error, ErrorKind, SeekFrom, IoSlice, IoSliceMut};
use crate::mem;
use crate::path::{Path, PathBuf};
use crate::ptr;
use crate::sync::Arc;
use crate::sys::fd::FileDesc;
use crate::sys::time::SystemTime;
use crate::sys::{cvt, cvt_r};
use crate::sys_common::{AsInner, FromInner};
use libc::{self, c_int, mode_t, stat64, off_t};
use libc::{ftruncate, lseek, dirent, readdir_r as readdir64_r, open};
use crate::sys::vxworks::ext::ffi::OsStringExt;
pub struct File(FileDesc);
#[derive(Clone)]
pub struct FileAttr {
stat: stat64,
}
// all DirEntry's will have a reference to this struct
struct InnerReadDir {
dirp: Dir,
root: PathBuf,
}
#[derive(Clone)]
pub struct ReadDir {
inner: Arc<InnerReadDir>,
end_of_stream: bool,
}
struct Dir(*mut libc::DIR);
unsafe impl Send for Dir {}
unsafe impl Sync for Dir {}
pub struct DirEntry {
entry: dirent,
dir: ReadDir,
}
#[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: mode_t,
}
#[derive(Clone, PartialEq, Eq, Debug)]
pub struct FilePermissions { mode: mode_t }
#[derive(Copy, Clone, PartialEq, Eq, Hash, Debug)]
pub struct FileType { mode: mode_t }
#[derive(Debug)]
pub struct DirBuilder { mode: mode_t }
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 mode_t) }
}
pub fn file_type(&self) -> FileType {
FileType { mode: self.stat.st_mode as mode_t }
}
pub fn modified(&self) -> io::Result<SystemTime> {
Ok(SystemTime::from(libc::timespec {
tv_sec: self.stat.st_mtime as libc::time_t,
tv_nsec: 0, // hack 2.0;
}))
}
pub fn accessed(&self) -> io::Result<SystemTime> {
Ok(SystemTime::from(libc::timespec {
tv_sec: self.stat.st_atime as libc::time_t,
tv_nsec: 0, // hack - a proper fix would be better
}))
}
pub fn created(&self) -> io::Result<SystemTime> {
Err(io::Error::new(io::ErrorKind::Other,
"creation time is not available on this platform currently"))
}
}
impl AsInner<stat64> for FileAttr {
fn as_inner(&self) -> &stat64 { &self.stat }
}
impl FilePermissions {
pub fn readonly(&self) -> bool {
// check if any class (owner, group, others) has write permission
self.mode & 0o222 == 0
}
pub fn set_readonly(&mut self, readonly: bool) {
if readonly {
// remove write permission for all classes; equivalent to `chmod a-w <file>`
self.mode &= !0o222;
} else {
// add write permission for all classes; equivalent to `chmod a+w <file>`
self.mode |= 0o222;
}
}
pub fn mode(&self) -> u32 { self.mode as u32 }
}
impl FileType {
pub fn is_dir(&self) -> bool { self.is(libc::S_IFDIR) }
pub fn is_file(&self) -> bool { self.is(libc::S_IFREG) }
pub fn is_symlink(&self) -> bool { self.is(libc::S_IFLNK) }
pub fn is(&self, mode: mode_t) -> bool { self.mode & libc::S_IFMT == mode }
}
impl FromInner<u32> for FilePermissions {
fn from_inner(mode: u32) -> FilePermissions {
FilePermissions { mode: mode as mode_t }
}
}
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.inner.root, f)
}
}
impl Iterator for ReadDir {
type Item = io::Result<DirEntry>;
fn next(&mut self) -> Option<io::Result<DirEntry>> {
if self.end_of_stream {
return None;
}
unsafe {
let mut ret = DirEntry {
entry: mem::zeroed(),
dir: self.clone(),
};
let mut entry_ptr = ptr::null_mut();
loop {
if readdir64_r(self.inner.dirp.0, &mut ret.entry, &mut entry_ptr) != 0 {
if entry_ptr.is_null() {
// We encountered an error (which will be returned in this iteration), but
// we also reached the end of the directory stream. The `end_of_stream`
// flag is enabled to make sure that we return `None` in the next iteration
// (instead of looping forever)
self.end_of_stream = true;
}
return Some(Err(Error::last_os_error()))
}
if entry_ptr.is_null() {
return None
}
if ret.name_bytes() != b"." && ret.name_bytes() != b".." {
return Some(Ok(ret))
}
}
}
}
}
impl Drop for Dir {
fn drop(&mut self) {
let r = unsafe { libc::closedir(self.0) };
debug_assert_eq!(r, 0);
}
}
impl DirEntry {
pub fn path(&self) -> PathBuf {
use crate::sys::vxworks::ext::ffi::OsStrExt;
self.dir.inner.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())
}
pub fn ino(&self) -> u64 {
self.entry.d_ino as u64
}
fn name_bytes(&self) -> &[u8] {
unsafe {
//&*self.name
CStr::from_ptr(self.entry.d_name.as_ptr()).to_bytes()
}
}
}
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 mode(&mut self, mode: u32) { self.mode = mode as mode_t; }
fn get_access_mode(&self) -> io::Result<c_int> {
match (self.read, self.write, self.append) {
(true, false, false) => Ok(libc::O_RDONLY),
(false, true, false) => Ok(libc::O_WRONLY),
(true, true, false) => Ok(libc::O_RDWR),
(false, _, true) => Ok(libc::O_WRONLY | libc::O_APPEND),
(true, _, true) => Ok(libc::O_RDWR | libc::O_APPEND),
(false, false, false) => Err(Error::from_raw_os_error(libc::EINVAL)),
}
}
fn get_creation_mode(&self) -> io::Result<c_int> {
match (self.write, self.append) {
(true, false) => {}
(false, false) =>
if self.truncate || self.create || self.create_new {
return Err(Error::from_raw_os_error(libc::EINVAL));
},
(_, true) =>
if self.truncate && !self.create_new {
return Err(Error::from_raw_os_error(libc::EINVAL));
},
}
Ok(match (self.create, self.truncate, self.create_new) {
(false, false, false) => 0,
(true, false, false) => libc::O_CREAT,
(false, true, false) => libc::O_TRUNC,
(true, true, false) => libc::O_CREAT | libc::O_TRUNC,
(_, _, true) => libc::O_CREAT | libc::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 flags = libc::O_CLOEXEC |
opts.get_access_mode()? |
opts.get_creation_mode()? |
(opts.custom_flags as c_int & !libc::O_ACCMODE);
let fd = cvt_r(|| unsafe {
open(path.as_ptr(), flags, opts.mode as c_int)
})?;
Ok(File(FileDesc::new(fd)))
}
pub fn file_attr(&self) -> io::Result<FileAttr> {
let mut stat: stat64 = unsafe { mem::zeroed() };
cvt(unsafe {
::libc::fstat(self.0.raw(), &mut stat)
})?;
Ok(FileAttr { stat: stat })
}
pub fn fsync(&self) -> io::Result<()> {
cvt_r(|| unsafe { libc::fsync(self.0.raw()) })?;
Ok(())
}
pub fn datasync(&self) -> io::Result<()> {
cvt_r(|| unsafe { os_datasync(self.0.raw()) })?;
return Ok(());
unsafe fn os_datasync(fd: c_int) -> c_int { libc::fsync(fd) } //not supported
}
pub fn truncate(&self, size: u64) -> io::Result<()> {
return cvt_r(|| unsafe {
ftruncate(self.0.raw(), size as off_t)
}).map(|_| ());
}
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> {
self.0.read_vectored(bufs)
}
pub fn read_at(&self, buf: &mut [u8], offset: u64) -> io::Result<usize> {
self.0.read_at(buf, offset)
}
pub fn write(&self, buf: &[u8]) -> io::Result<usize> {
self.0.write(buf)
}
pub fn write_vectored(&self, bufs: &[IoSlice<'_>]) -> io::Result<usize> {
self.0.write_vectored(bufs)
}
pub fn write_at(&self, buf: &[u8], offset: u64) -> io::Result<usize> {
self.0.write_at(buf, offset)
}
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) => (libc::SEEK_SET, off as i64),
SeekFrom::End(off) => (libc::SEEK_END, off),
SeekFrom::Current(off) => (libc::SEEK_CUR, off),
};
let n = cvt(unsafe { lseek(self.0.raw(), pos, whence) })?;
Ok(n as u64)
}
pub fn duplicate(&self) -> io::Result<File> {
self.0.duplicate().map(File)
}
pub fn fd(&self) -> &FileDesc { &self.0 }
pub fn into_fd(self) -> FileDesc { self.0 }
pub fn set_permissions(&self, perm: FilePermissions) -> io::Result<()> {
cvt_r(|| unsafe { libc::fchmod(self.0.raw(), perm.mode) })?;
Ok(())
}
pub fn diverge(&self) -> ! {
panic!()
}
}
impl DirBuilder {
pub fn new() -> DirBuilder {
DirBuilder { mode: 0o777 }
}
pub fn mkdir(&self, p: &Path) -> io::Result<()> {
let p = cstr(p)?;
cvt(unsafe { libc::mkdir(p.as_ptr(), self.mode) })?;
Ok(())
}
pub fn set_mode(&mut self, mode: u32) {
self.mode = mode as mode_t;
}
}
fn cstr(path: &Path) -> io::Result<CString> {
use crate::sys::vxworks::ext::ffi::OsStrExt;
Ok(CString::new(path.as_os_str().as_bytes())?)
}
impl FromInner<c_int> for File {
fn from_inner(fd: c_int) -> File {
File(FileDesc::new(fd))
}
}
impl fmt::Debug for File {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
fn get_path(_fd: c_int) -> Option<PathBuf> {
// FIXME(#:(): implement this for VxWorks
None
}
fn get_mode(_fd: c_int) -> Option<(bool, bool)> {
// FIXME(#:(): implement this for VxWorks
None
}
let fd = self.0.raw();
let mut b = f.debug_struct("File");
b.field("fd", &fd);
if let Some(path) = get_path(fd) {
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 = p.to_path_buf();
let p = cstr(p)?;
unsafe {
let ptr = libc::opendir(p.as_ptr());
if ptr.is_null() {
Err(Error::last_os_error())
} else {
let inner = InnerReadDir { dirp: Dir(ptr), root };
Ok(ReadDir{
inner: Arc::new(inner),
end_of_stream: false,
})
}
}
}
pub fn unlink(p: &Path) -> io::Result<()> {
let p = cstr(p)?;
cvt(unsafe { libc::unlink(p.as_ptr()) })?;
Ok(())
}
pub fn rename(old: &Path, new: &Path) -> io::Result<()> {
let old = cstr(old)?;
let new = cstr(new)?;
cvt(unsafe { libc::rename(old.as_ptr(), new.as_ptr()) })?;
Ok(())
}
pub fn set_perm(p: &Path, perm: FilePermissions) -> io::Result<()> {
let p = cstr(p)?;
cvt_r(|| unsafe { libc::chmod(p.as_ptr(), perm.mode) })?;
Ok(())
}
pub fn rmdir(p: &Path) -> io::Result<()> {
let p = cstr(p)?;
cvt(unsafe { libc::rmdir(p.as_ptr()) })?;
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 c_path = cstr(p)?;
let p = c_path.as_ptr();
let mut buf = Vec::with_capacity(256);
loop {
let buf_read = cvt(unsafe {
libc::readlink(p, buf.as_mut_ptr() as *mut _, buf.capacity())
})? as usize;
unsafe { buf.set_len(buf_read); }
if buf_read != buf.capacity() {
buf.shrink_to_fit();
return Ok(PathBuf::from(OsString::from_vec(buf)));
}
// Trigger the internal buffer resizing logic of `Vec` by requiring
// more space than the current capacity. The length is guaranteed to be
// the same as the capacity due to the if statement above.
buf.reserve(1);
}
}
pub fn symlink(src: &Path, dst: &Path) -> io::Result<()> {
let src = cstr(src)?;
let dst = cstr(dst)?;
cvt(unsafe { libc::symlink(src.as_ptr(), dst.as_ptr()) })?;
Ok(())
}
pub fn link(src: &Path, dst: &Path) -> io::Result<()> {
let src = cstr(src)?;
let dst = cstr(dst)?;
cvt(unsafe { libc::link(src.as_ptr(), dst.as_ptr()) })?;
Ok(())
}
pub fn stat(p: &Path) -> io::Result<FileAttr> {
let p = cstr(p)?;
let mut stat: stat64 = unsafe { mem::zeroed() };
cvt(unsafe {
libc::stat(p.as_ptr(), &mut stat as *mut _ as *mut _)
})?;
Ok(FileAttr { stat })
}
pub fn lstat(p: &Path) -> io::Result<FileAttr> {
let p = cstr(p)?;
let mut stat: stat64 = unsafe { mem::zeroed() };
cvt(unsafe {
::libc::lstat(p.as_ptr(), &mut stat as *mut _ as *mut _)
})?;
Ok(FileAttr { stat })
}
pub fn canonicalize(p: &Path) -> io::Result<PathBuf> {
use crate::sys::vxworks::ext::ffi::OsStrExt;
let path = CString::new(p.as_os_str().as_bytes())?;
let buf;
unsafe {
let r = libc::realpath(path.as_ptr(), ptr::null_mut());
if r.is_null() {
return Err(io::Error::last_os_error())
}
buf = CStr::from_ptr(r).to_bytes().to_vec();
libc::free(r as *mut _);
}
Ok(PathBuf::from(OsString::from_vec(buf)))
}
pub fn copy(from: &Path, to: &Path) -> io::Result<u64> {
use crate::fs::File;
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)?;
writer.set_permissions(perm)?;
Ok(ret)
}
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