library/std/src/sys/hermit/fs.rs

   1 use crate::ffi::{CStr, CString, OsString};
   2 use crate::fmt;
   3 use crate::hash::{Hash, Hasher};
   4 use crate::io::{self, Error, ErrorKind};
   5 use crate::io::{IoSlice, IoSliceMut, ReadBuf, SeekFrom};
   6 use crate::os::unix::ffi::OsStrExt;
   7 use crate::path::{Path, PathBuf};
   8 use crate::sys::cvt;
   9 use crate::sys::hermit::abi;
  10 use crate::sys::hermit::abi::{O_APPEND, O_CREAT, O_EXCL, O_RDONLY, O_RDWR, O_TRUNC, O_WRONLY};
  11 use crate::sys::hermit::fd::FileDesc;
  12 use crate::sys::time::SystemTime;
  13 use crate::sys::unsupported;
  14
  15 pub use crate::sys_common::fs::{copy, try_exists};
  16 //pub use crate::sys_common::fs::remove_dir_all;
  17
  18 fn cstr(path: &Path) -> io::Result<CString> {
  19     Ok(CString::new(path.as_os_str().as_bytes())?)
  20 }
  21
  22 #[derive(Debug)]
  23 pub struct File(FileDesc);
  24
  25 pub struct FileAttr(!);
  26
  27 pub struct ReadDir(!);
  28
  29 pub struct DirEntry(!);
  30
  31 #[derive(Clone, Debug)]
  32 pub struct OpenOptions {
  33     // generic
  34     read: bool,
  35     write: bool,
  36     append: bool,
  37     truncate: bool,
  38     create: bool,
  39     create_new: bool,
  40     // system-specific
  41     mode: i32,
  42 }
  43
  44 pub struct FilePermissions(!);
  45
  46 pub struct FileType(!);
  47
  48 #[derive(Debug)]
  49 pub struct DirBuilder {}
  50
  51 impl FileAttr {
  52     pub fn size(&self) -> u64 {
  53         self.0
  54     }
  55
  56     pub fn perm(&self) -> FilePermissions {
  57         self.0
  58     }
  59
  60     pub fn file_type(&self) -> FileType {
  61         self.0
  62     }
  63
  64     pub fn modified(&self) -> io::Result<SystemTime> {
  65         self.0
  66     }
  67
  68     pub fn accessed(&self) -> io::Result<SystemTime> {
  69         self.0
  70     }
  71
  72     pub fn created(&self) -> io::Result<SystemTime> {
  73         self.0
  74     }
  75 }
  76
  77 impl Clone for FileAttr {
  78     fn clone(&self) -> FileAttr {
  79         self.0
  80     }
  81 }
  82
  83 impl FilePermissions {
  84     pub fn readonly(&self) -> bool {
  85         self.0
  86     }
  87
  88     pub fn set_readonly(&mut self, _readonly: bool) {
  89         self.0
  90     }
  91 }
  92
  93 impl Clone for FilePermissions {
  94     fn clone(&self) -> FilePermissions {
  95         self.0
  96     }
  97 }
  98
  99 impl PartialEq for FilePermissions {
 100     fn eq(&self, _other: &FilePermissions) -> bool {
 101         self.0
 102     }
 103 }
 104
 105 impl Eq for FilePermissions {}
 106
 107 impl fmt::Debug for FilePermissions {
 108     fn fmt(&self, _f: &mut fmt::Formatter<'_>) -> fmt::Result {
 109         self.0
 110     }
 111 }
 112
 113 impl FileType {
 114     pub fn is_dir(&self) -> bool {
 115         self.0
 116     }
 117
 118     pub fn is_file(&self) -> bool {
 119         self.0
 120     }
 121
 122     pub fn is_symlink(&self) -> bool {
 123         self.0
 124     }
 125 }
 126
 127 impl Clone for FileType {
 128     fn clone(&self) -> FileType {
 129         self.0
 130     }
 131 }
 132
 133 impl Copy for FileType {}
 134
 135 impl PartialEq for FileType {
 136     fn eq(&self, _other: &FileType) -> bool {
 137         self.0
 138     }
 139 }
 140
 141 impl Eq for FileType {}
 142
 143 impl Hash for FileType {
 144     fn hash<H: Hasher>(&self, _h: &mut H) {
 145         self.0
 146     }
 147 }
 148
 149 impl fmt::Debug for FileType {
 150     fn fmt(&self, _f: &mut fmt::Formatter<'_>) -> fmt::Result {
 151         self.0
 152     }
 153 }
 154
 155 impl fmt::Debug for ReadDir {
 156     fn fmt(&self, _f: &mut fmt::Formatter<'_>) -> fmt::Result {
 157         self.0
 158     }
 159 }
 160
 161 impl Iterator for ReadDir {
 162     type Item = io::Result<DirEntry>;
 163
 164     fn next(&mut self) -> Option<io::Result<DirEntry>> {
 165         self.0
 166     }
 167 }
 168
 169 impl DirEntry {
 170     pub fn path(&self) -> PathBuf {
 171         self.0
 172     }
 173
 174     pub fn file_name(&self) -> OsString {
 175         self.0
 176     }
 177
 178     pub fn metadata(&self) -> io::Result<FileAttr> {
 179         self.0
 180     }
 181
 182     pub fn file_type(&self) -> io::Result<FileType> {
 183         self.0
 184     }
 185 }
 186
 187 impl OpenOptions {
 188     pub fn new() -> OpenOptions {
 189         OpenOptions {
 190             // generic
 191             read: false,
 192             write: false,
 193             append: false,
 194             truncate: false,
 195             create: false,
 196             create_new: false,
 197             // system-specific
 198             mode: 0x777,
 199         }
 200     }
 201
 202     pub fn read(&mut self, read: bool) {
 203         self.read = read;
 204     }
 205     pub fn write(&mut self, write: bool) {
 206         self.write = write;
 207     }
 208     pub fn append(&mut self, append: bool) {
 209         self.append = append;
 210     }
 211     pub fn truncate(&mut self, truncate: bool) {
 212         self.truncate = truncate;
 213     }
 214     pub fn create(&mut self, create: bool) {
 215         self.create = create;
 216     }
 217     pub fn create_new(&mut self, create_new: bool) {
 218         self.create_new = create_new;
 219     }
 220
 221     fn get_access_mode(&self) -> io::Result<i32> {
 222         match (self.read, self.write, self.append) {
 223             (true, false, false) => Ok(O_RDONLY),
 224             (false, true, false) => Ok(O_WRONLY),
 225             (true, true, false) => Ok(O_RDWR),
 226             (false, _, true) => Ok(O_WRONLY | O_APPEND),
 227             (true, _, true) => Ok(O_RDWR | O_APPEND),
 228             (false, false, false) => {
 229                 Err(io::const_io_error!(ErrorKind::InvalidInput, "invalid access mode"))
 230             }
 231         }
 232     }
 233
 234     fn get_creation_mode(&self) -> io::Result<i32> {
 235         match (self.write, self.append) {
 236             (true, false) => {}
 237             (false, false) => {
 238                 if self.truncate || self.create || self.create_new {
 239                     return Err(io::const_io_error!(
 240                         ErrorKind::InvalidInput,
 241                         "invalid creation mode",
 242                     ));
 243                 }
 244             }
 245             (_, true) => {
 246                 if self.truncate && !self.create_new {
 247                     return Err(io::const_io_error!(
 248                         ErrorKind::InvalidInput,
 249                         "invalid creation mode",
 250                     ));
 251                 }
 252             }
 253         }
 254
 255         Ok(match (self.create, self.truncate, self.create_new) {
 256             (false, false, false) => 0,
 257             (true, false, false) => O_CREAT,
 258             (false, true, false) => O_TRUNC,
 259             (true, true, false) => O_CREAT | O_TRUNC,
 260             (_, _, true) => O_CREAT | O_EXCL,
 261         })
 262     }
 263 }
 264
 265 impl File {
 266     pub fn open(path: &Path, opts: &OpenOptions) -> io::Result<File> {
 267         let path = cstr(path)?;
 268         File::open_c(&path, opts)
 269     }
 270
 271     pub fn open_c(path: &CStr, opts: &OpenOptions) -> io::Result<File> {
 272         let mut flags = opts.get_access_mode()?;
 273         flags = flags | opts.get_creation_mode()?;
 274
 275         let mode;
 276         if flags & O_CREAT == O_CREAT {
 277             mode = opts.mode;
 278         } else {
 279             mode = 0;
 280         }
 281
 282         let fd = unsafe { cvt(abi::open(path.as_ptr(), flags, mode))? };
 283         Ok(File(FileDesc::new(fd as i32)))
 284     }
 285
 286     pub fn file_attr(&self) -> io::Result<FileAttr> {
 287         Err(Error::from_raw_os_error(22))
 288     }
 289
 290     pub fn fsync(&self) -> io::Result<()> {
 291         Err(Error::from_raw_os_error(22))
 292     }
 293
 294     pub fn datasync(&self) -> io::Result<()> {
 295         self.fsync()
 296     }
 297
 298     pub fn truncate(&self, _size: u64) -> io::Result<()> {
 299         Err(Error::from_raw_os_error(22))
 300     }
 301
 302     pub fn read(&self, buf: &mut [u8]) -> io::Result<usize> {
 303         self.0.read(buf)
 304     }
 305
 306     pub fn read_vectored(&self, bufs: &mut [IoSliceMut<'_>]) -> io::Result<usize> {
 307         crate::io::default_read_vectored(|buf| self.read(buf), bufs)
 308     }
 309
 310     #[inline]
 311     pub fn is_read_vectored(&self) -> bool {
 312         false
 313     }
 314
 315     pub fn read_buf(&self, buf: &mut ReadBuf<'_>) -> io::Result<()> {
 316         crate::io::default_read_buf(|buf| self.read(buf), buf)
 317     }
 318
 319     pub fn write(&self, buf: &[u8]) -> io::Result<usize> {
 320         self.0.write(buf)
 321     }
 322
 323     pub fn write_vectored(&self, bufs: &[IoSlice<'_>]) -> io::Result<usize> {
 324         crate::io::default_write_vectored(|buf| self.write(buf), bufs)
 325     }
 326
 327     #[inline]
 328     pub fn is_write_vectored(&self) -> bool {
 329         false
 330     }
 331
 332     pub fn flush(&self) -> io::Result<()> {
 333         Ok(())
 334     }
 335
 336     pub fn seek(&self, _pos: SeekFrom) -> io::Result<u64> {
 337         Err(Error::from_raw_os_error(22))
 338     }
 339
 340     pub fn duplicate(&self) -> io::Result<File> {
 341         Err(Error::from_raw_os_error(22))
 342     }
 343
 344     pub fn set_permissions(&self, _perm: FilePermissions) -> io::Result<()> {
 345         Err(Error::from_raw_os_error(22))
 346     }
 347 }
 348
 349 impl DirBuilder {
 350     pub fn new() -> DirBuilder {
 351         DirBuilder {}
 352     }
 353
 354     pub fn mkdir(&self, _p: &Path) -> io::Result<()> {
 355         unsupported()
 356     }
 357 }
 358
 359 pub fn readdir(_p: &Path) -> io::Result<ReadDir> {
 360     unsupported()
 361 }
 362
 363 pub fn unlink(path: &Path) -> io::Result<()> {
 364     let name = cstr(path)?;
 365     let _ = unsafe { cvt(abi::unlink(name.as_ptr()))? };
 366     Ok(())
 367 }
 368
 369 pub fn rename(_old: &Path, _new: &Path) -> io::Result<()> {
 370     unsupported()
 371 }
 372
 373 pub fn set_perm(_p: &Path, perm: FilePermissions) -> io::Result<()> {
 374     match perm.0 {}
 375 }
 376
 377 pub fn rmdir(_p: &Path) -> io::Result<()> {
 378     unsupported()
 379 }
 380
 381 pub fn remove_dir_all(_path: &Path) -> io::Result<()> {
 382     //unsupported()
 383     Ok(())
 384 }
 385
 386 pub fn readlink(_p: &Path) -> io::Result<PathBuf> {
 387     unsupported()
 388 }
 389
 390 pub fn symlink(_original: &Path, _link: &Path) -> io::Result<()> {
 391     unsupported()
 392 }
 393
 394 pub fn link(_original: &Path, _link: &Path) -> io::Result<()> {
 395     unsupported()
 396 }
 397
 398 pub fn stat(_p: &Path) -> io::Result<FileAttr> {
 399     unsupported()
 400 }
 401
 402 pub fn lstat(_p: &Path) -> io::Result<FileAttr> {
 403     unsupported()
 404 }
 405
 406 pub fn canonicalize(_p: &Path) -> io::Result<PathBuf> {
 407     unsupported()
 408 }