    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    21
    22
    23
    24
    25
    26
    27
    28
    29
    30
    31
    32
    33
    34
    35
    36
    37
    38
    39
    40
    41
    42
    43
    44
    45
    46
    47
    48
    49
    50
    51
    52
    53
    54
    55
    56
    57
    58
    59
    60
    61
    62
    63
    64
    65
    66
    67
    68
    69
    70
    71
    72
    73
    74
    75
    76
    77
    78
    79
    80
    81
    82
    83
    84
    85
    86
    87
    88
    89
    90
    91
    92
    93
    94
    95
    96
    97
    98
    99
    100
    101
    102
    103
    104
    105
    106
    107
    108
    109
    110
    111
    112
    113
    114
    115
    116
    117
    118
    119
    120
    121
    122
    123
    124
    125
    126
    127
    128
    129
    130
    131
    132
    133
    134
    135
    136
    137
    138
    139
    140
    141
    142
    143
    144
    145
    146
    147
    148
    149
    150
    151
    152
    153
    154
    155
    156
    157
    158
    159
    160
    161
    162
    163
    164
    165
    166
    167
    168
    169
    170
    171
    172
    173
    174
    175
    176
    177
    178
    179
    180
    181
    182
    183
    184
    185
    186
    187
    188
    189
    190
    191
    192
    193
    194
    195
    196
    197
    198
    199
    200
    201
    202
    203
    204
    205
    206
    207
    208
    209
    210
    211
    212
    213
    214
    215
    216
    217
    218
    219
    220
    221
    222
    223
    224
    225
    226
    227
    228
    229
    230
    231
    232
    233
    234
    235
    236
    237
    238
    239
    240
    241
    242
    243
    244
    245
    246
    247
    248
    249
    250
    251
    252
    253
    254
    255
    256
    257
    258
    259
    260
    261
    262
    263
    264
    265
    266
    267
    268
    269
    270
    271
    272
    273
    274
    275
    276
    277
    278
    279
    280
    281
    282
    283
    284
    285
    286
    287
    288
    289
    290
    291
    292
    293
    294
    295
    296
    297
    298
    299
    300
    301
    302
    303
    304
    305
    306
    307
    308
    309
    310
    311
    312
    313
    314
    315
    316
    317
    318
    319
    320
    321
    322
    323
    324
    325
    326
    327
    328
    329
    330
    331
    332
    333
    334
    335
    336
    337
    338
    339
    340
    341
    342
    343
    344
    345
    346
    347
    348
    349
    350
    351
    352
    353
    354
    355
    356
    357
    358
    359
    360
    361
    362
    363
    364
    365
    366
    367
    368
    369
    370
    371
    372
    373
    374
    375
    376
    377
    378
    379
    380
    381
    382
    383
    384
    385
    386
    387
    388
    389
    390
    391
    392
    393
    394
    395
    396
    397
    398
    399
    400
    401
    402
    403
    404
    405
    406
    407
    408
    409
    410
    411
    412
    413
    414
    415
    416
    417
    418
    419
    420
    421
    422
    423
    424
    425
    426
    427
    428
    429
    430
    431
    432
    433
    434
    435
    436
    437
    438
    439
    440
    441
    442
    443
    444
    445
    446
    447
    448
    449
    450
    451
    452
    453
    454
    455
    456
    457
    458
    459
    460
    461
    462
    463
    464
    465
    466
    467
    468
    469
    470
    471
    472
    473
    474
    475
    476
    477
    478
    479
    480
    481
    482
    483
    484
    485
    486
    487
    488
    489
    490
    491
    492
    493
    494
    495
    496
    497
    498
    499
    500
    501
    502
    503
    504
    505
    506
    507
    508
    509
    510
    511
    512
    513
    514
    515
    516
    517

    //! The `rustix` `Errno` type.
    //!
    //! This type holds an OS error code, which conceptually corresponds to an
    //! `errno` value.
    //!
    //! # Safety
    //!
    //! Linux uses error codes in `-4095..0`; we use rustc attributes to describe
    //! this restricted range of values.
    #![allow(unsafe_code)]
    #![cfg_attr(not(rustc_attrs), allow(unused_unsafe))]

    use super::super::c;
    use crate::backend::fd::RawFd;
    use crate::backend::reg::{RetNumber, RetReg};
    use crate::io;
    use linux_raw_sys::errno;

    /// The error type for `rustix` APIs.
    ///
    /// This is similar to `std::io::Error`, but only holds an OS error code,
    /// and no extra error value.
    #[repr(transparent)]
    #[doc(alias = "errno")]
    #[derive(Eq, PartialEq, Hash, Copy, Clone)]
    // Linux returns negated error codes, and we leave them in negated form, so
    // error codes are in `-4095..0`.
    #[cfg_attr(rustc_attrs, rustc_layout_scalar_valid_range_start(0xf001))]
    #[cfg_attr(rustc_attrs, rustc_layout_scalar_valid_range_end(0xffff))]
    pub struct Errno(u16);

    impl Errno {
        /// Extract an `Errno` value from a `std::io::Error`.
        ///
        /// This isn't a `From` conversion because it's expected to be relatively
        /// uncommon.
        #[cfg(feature = "std")]
        #[inline]
        pub fn from_io_error(io_err: &std::io::Error) -> Option<Self> {
            io_err.raw_os_error().and_then(|raw| {
                // `std::io::Error` could theoretically have arbitrary "OS error"
                // values, so check that they're in Linux's range.
                if (1..4096).contains(&raw) {
                    Some(Self::from_errno(raw as u32))
                } else {
                    None
                }
            })
        }

        /// Extract the raw OS error number from this error.
        #[inline]
        pub const fn raw_os_error(self) -> i32 {
            (self.0 as i16 as i32).wrapping_neg()
        }

        /// Construct an `Errno` from a raw OS error number.
        #[inline]
        pub const fn from_raw_os_error(raw: i32) -> Self {
            Self::from_errno(raw as u32)
        }

        /// Convert from a C errno value (which is positive) to an `Errno`.
        const fn from_errno(raw: u32) -> Self {
            // We store error values in negated form, so that we don't have to negate
            // them after every syscall.
            let encoded = raw.wrapping_neg() as u16;

            // TODO: Use Range::contains, once that's `const`.
            const_assert!(encoded >= 0xf001);

            // Safety: Linux syscalls return negated error values in the range
            // `-4095..0`, which we just asserted.
            unsafe { Self(encoded) }
        }
    }

    /// Check for an error from the result of a syscall which encodes a
    /// `c::c_int` on success.
    #[inline]
    pub(in crate::backend) fn try_decode_c_int<Num: RetNumber>(
        raw: RetReg<Num>,
    ) -> io::Result<c::c_int> {
        if raw.is_in_range(-4095..0) {
            // Safety: `raw` must be in `-4095..0`, and we just checked that raw is
            // in that range.
            return Err(unsafe { Errno(raw.decode_error_code()) });
        }

        Ok(raw.decode_c_int())
    }

    /// Check for an error from the result of a syscall which encodes a
    /// `c::c_uint` on success.
    #[inline]
    pub(in crate::backend) fn try_decode_c_uint<Num: RetNumber>(
        raw: RetReg<Num>,
    ) -> io::Result<c::c_uint> {
        if raw.is_in_range(-4095..0) {
            // Safety: `raw` must be in `-4095..0`, and we just checked that raw is
            // in that range.
            return Err(unsafe { Errno(raw.decode_error_code()) });
        }

        Ok(raw.decode_c_uint())
    }

    /// Check for an error from the result of a syscall which encodes a `usize` on
    /// success.
    #[inline]
    pub(in crate::backend) fn try_decode_usize<Num: RetNumber>(raw: RetReg<Num>) -> io::Result<usize> {
        if raw.is_in_range(-4095..0) {
            // Safety: `raw` must be in `-4095..0`, and we just checked that raw is
            // in that range.
            return Err(unsafe { Errno(raw.decode_error_code()) });
        }

        Ok(raw.decode_usize())
    }

    /// Check for an error from the result of a syscall which encodes a
    /// `*mut c_void` on success.
    #[inline]
    pub(in crate::backend) fn try_decode_void_star<Num: RetNumber>(
        raw: RetReg<Num>,
    ) -> io::Result<*mut c::c_void> {
        if raw.is_in_range(-4095..0) {
            // Safety: `raw` must be in `-4095..0`, and we just checked that raw is
            // in that range.
            return Err(unsafe { Errno(raw.decode_error_code()) });
        }

        Ok(raw.decode_void_star())
    }

    /// Check for an error from the result of a syscall which encodes a
    /// `u64` on success.
    #[cfg(target_pointer_width = "64")]
    #[inline]
    pub(in crate::backend) fn try_decode_u64<Num: RetNumber>(raw: RetReg<Num>) -> io::Result<u64> {
        if raw.is_in_range(-4095..0) {
            // Safety: `raw` must be in `-4095..0`, and we just checked that raw is
            // in that range.
            return Err(unsafe { Errno(raw.decode_error_code()) });
        }

        Ok(raw.decode_u64())
    }

    /// Check for an error from the result of a syscall which encodes a file
    /// descriptor on success.
    ///
    /// # Safety
    ///
    /// This must only be used with syscalls which return file descriptors on
    /// success.
    #[inline]
    pub(in crate::backend) unsafe fn try_decode_raw_fd<Num: RetNumber>(
        raw: RetReg<Num>,
    ) -> io::Result<RawFd> {
        // Instead of using `check_result` here, we just check for negative, since
        // this function is only used for system calls which return file
        // descriptors, and this produces smaller code.
        if raw.is_negative() {
            debug_assert!(raw.is_in_range(-4095..0));

            // Tell the optimizer that we know the value is in the error range.
            // This helps it avoid unnecessary integer conversions.
            #[cfg(core_intrinsics)]
            {
                core::intrinsics::assume(raw.is_in_range(-4095..0));
            }

            return Err(Errno(raw.decode_error_code()));
        }

        Ok(raw.decode_raw_fd())
    }

    /// Check for an error from the result of a syscall which encodes no value on
    /// success. On success, return the unconsumed `raw` value.
    ///
    /// # Safety
    ///
    /// This must only be used with syscalls which return no value on success.
    #[inline]
    pub(in crate::backend) unsafe fn try_decode_void<Num: RetNumber>(
        raw: RetReg<Num>,
    ) -> io::Result<()> {
        // Instead of using `check_result` here, we just check for zero, since this
        // function is only used for system calls which have no other return value,
        // and this produces smaller code.
        if raw.is_nonzero() {
            debug_assert!(raw.is_in_range(-4095..0));

            // Tell the optimizer that we know the value is in the error range.
            // This helps it avoid unnecessary integer conversions.
            #[cfg(core_intrinsics)]
            {
                core::intrinsics::assume(raw.is_in_range(-4095..0));
            }

            return Err(Errno(raw.decode_error_code()));
        }

        raw.decode_void();

        Ok(())
    }

    /// Check for an error from the result of a syscall which does not return on
    /// success. On success, return the unconsumed `raw` value.
    ///
    /// # Safety
    ///
    /// This must only be used with syscalls which do not return on success.
    #[cfg(feature = "runtime")]
    #[inline]
    pub(in crate::backend) unsafe fn try_decode_error<Num: RetNumber>(raw: RetReg<Num>) -> io::Errno {
        debug_assert!(raw.is_in_range(-4095..0));

        // Tell the optimizer that we know the value is in the error range.
        // This helps it avoid unnecessary integer conversions.
        #[cfg(core_intrinsics)]
        {
            core::intrinsics::assume(raw.is_in_range(-4095..0));
        }

        Errno(raw.decode_error_code())
    }

    /// Return the contained `usize` value.
    #[cfg(not(debug_assertions))]
    #[inline]
    pub(in crate::backend) fn decode_usize_infallible<Num: RetNumber>(raw: RetReg<Num>) -> usize {
        raw.decode_usize()
    }

    impl Errno {
        /// `EACCES`
        #[doc(alias = "ACCES")]
        pub const ACCESS: Self = Self::from_errno(errno::EACCES);
        /// `EADDRINUSE`
        pub const ADDRINUSE: Self = Self::from_errno(errno::EADDRINUSE);
        /// `EADDRNOTAVAIL`
        pub const ADDRNOTAVAIL: Self = Self::from_errno(errno::EADDRNOTAVAIL);
        /// `EADV`
        pub const ADV: Self = Self::from_errno(errno::EADV);
        /// `EAFNOSUPPORT`
        pub const AFNOSUPPORT: Self = Self::from_errno(errno::EAFNOSUPPORT);
        /// `EAGAIN`
        pub const AGAIN: Self = Self::from_errno(errno::EAGAIN);
        /// `EALREADY`
        pub const ALREADY: Self = Self::from_errno(errno::EALREADY);
        /// `EBADE`
        pub const BADE: Self = Self::from_errno(errno::EBADE);
        /// `EBADF`
        pub const BADF: Self = Self::from_errno(errno::EBADF);
        /// `EBADFD`
        pub const BADFD: Self = Self::from_errno(errno::EBADFD);
        /// `EBADMSG`
        pub const BADMSG: Self = Self::from_errno(errno::EBADMSG);
        /// `EBADR`
        pub const BADR: Self = Self::from_errno(errno::EBADR);
        /// `EBADRQC`
        pub const BADRQC: Self = Self::from_errno(errno::EBADRQC);
        /// `EBADSLT`
        pub const BADSLT: Self = Self::from_errno(errno::EBADSLT);
        /// `EBFONT`
        pub const BFONT: Self = Self::from_errno(errno::EBFONT);
        /// `EBUSY`
        pub const BUSY: Self = Self::from_errno(errno::EBUSY);
        /// `ECANCELED`
        pub const CANCELED: Self = Self::from_errno(errno::ECANCELED);
        /// `ECHILD`
        pub const CHILD: Self = Self::from_errno(errno::ECHILD);
        /// `ECHRNG`
        pub const CHRNG: Self = Self::from_errno(errno::ECHRNG);
        /// `ECOMM`
        pub const COMM: Self = Self::from_errno(errno::ECOMM);
        /// `ECONNABORTED`
        pub const CONNABORTED: Self = Self::from_errno(errno::ECONNABORTED);
        /// `ECONNREFUSED`
        pub const CONNREFUSED: Self = Self::from_errno(errno::ECONNREFUSED);
        /// `ECONNRESET`
        pub const CONNRESET: Self = Self::from_errno(errno::ECONNRESET);
        /// `EDEADLK`
        pub const DEADLK: Self = Self::from_errno(errno::EDEADLK);
        /// `EDEADLOCK`
        pub const DEADLOCK: Self = Self::from_errno(errno::EDEADLOCK);
        /// `EDESTADDRREQ`
        pub const DESTADDRREQ: Self = Self::from_errno(errno::EDESTADDRREQ);
        /// `EDOM`
        pub const DOM: Self = Self::from_errno(errno::EDOM);
        /// `EDOTDOT`
        pub const DOTDOT: Self = Self::from_errno(errno::EDOTDOT);
        /// `EDQUOT`
        pub const DQUOT: Self = Self::from_errno(errno::EDQUOT);
        /// `EEXIST`
        pub const EXIST: Self = Self::from_errno(errno::EEXIST);
        /// `EFAULT`
        pub const FAULT: Self = Self::from_errno(errno::EFAULT);
        /// `EFBIG`
        pub const FBIG: Self = Self::from_errno(errno::EFBIG);
        /// `EHOSTDOWN`
        pub const HOSTDOWN: Self = Self::from_errno(errno::EHOSTDOWN);
        /// `EHOSTUNREACH`
        pub const HOSTUNREACH: Self = Self::from_errno(errno::EHOSTUNREACH);
        /// `EHWPOISON`
        pub const HWPOISON: Self = Self::from_errno(errno::EHWPOISON);
        /// `EIDRM`
        pub const IDRM: Self = Self::from_errno(errno::EIDRM);
        /// `EILSEQ`
        pub const ILSEQ: Self = Self::from_errno(errno::EILSEQ);
        /// `EINPROGRESS`
        pub const INPROGRESS: Self = Self::from_errno(errno::EINPROGRESS);
        /// `EINTR`.
        ///
        /// For a convenient way to retry system calls that exit with `INTR`, use
        /// [`retry_on_intr`].
        ///
        /// [`retry_on_intr`]: io::retry_on_intr
        pub const INTR: Self = Self::from_errno(errno::EINTR);
        /// `EINVAL`
        pub const INVAL: Self = Self::from_errno(errno::EINVAL);
        /// `EIO`
        pub const IO: Self = Self::from_errno(errno::EIO);
        /// `EISCONN`
        pub const ISCONN: Self = Self::from_errno(errno::EISCONN);
        /// `EISDIR`
        pub const ISDIR: Self = Self::from_errno(errno::EISDIR);
        /// `EISNAM`
        pub const ISNAM: Self = Self::from_errno(errno::EISNAM);
        /// `EKEYEXPIRED`
        pub const KEYEXPIRED: Self = Self::from_errno(errno::EKEYEXPIRED);
        /// `EKEYREJECTED`
        pub const KEYREJECTED: Self = Self::from_errno(errno::EKEYREJECTED);
        /// `EKEYREVOKED`
        pub const KEYREVOKED: Self = Self::from_errno(errno::EKEYREVOKED);
        /// `EL2HLT`
        pub const L2HLT: Self = Self::from_errno(errno::EL2HLT);
        /// `EL2NSYNC`
        pub const L2NSYNC: Self = Self::from_errno(errno::EL2NSYNC);
        /// `EL3HLT`
        pub const L3HLT: Self = Self::from_errno(errno::EL3HLT);
        /// `EL3RST`
        pub const L3RST: Self = Self::from_errno(errno::EL3RST);
        /// `ELIBACC`
        pub const LIBACC: Self = Self::from_errno(errno::ELIBACC);
        /// `ELIBBAD`
        pub const LIBBAD: Self = Self::from_errno(errno::ELIBBAD);
        /// `ELIBEXEC`
        pub const LIBEXEC: Self = Self::from_errno(errno::ELIBEXEC);
        /// `ELIBMAX`
        pub const LIBMAX: Self = Self::from_errno(errno::ELIBMAX);
        /// `ELIBSCN`
        pub const LIBSCN: Self = Self::from_errno(errno::ELIBSCN);
        /// `ELNRNG`
        pub const LNRNG: Self = Self::from_errno(errno::ELNRNG);
        /// `ELOOP`
        pub const LOOP: Self = Self::from_errno(errno::ELOOP);
        /// `EMEDIUMTYPE`
        pub const MEDIUMTYPE: Self = Self::from_errno(errno::EMEDIUMTYPE);
        /// `EMFILE`
        pub const MFILE: Self = Self::from_errno(errno::EMFILE);
        /// `EMLINK`
        pub const MLINK: Self = Self::from_errno(errno::EMLINK);
        /// `EMSGSIZE`
        pub const MSGSIZE: Self = Self::from_errno(errno::EMSGSIZE);
        /// `EMULTIHOP`
        pub const MULTIHOP: Self = Self::from_errno(errno::EMULTIHOP);
        /// `ENAMETOOLONG`
        pub const NAMETOOLONG: Self = Self::from_errno(errno::ENAMETOOLONG);
        /// `ENAVAIL`
        pub const NAVAIL: Self = Self::from_errno(errno::ENAVAIL);
        /// `ENETDOWN`
        pub const NETDOWN: Self = Self::from_errno(errno::ENETDOWN);
        /// `ENETRESET`
        pub const NETRESET: Self = Self::from_errno(errno::ENETRESET);
        /// `ENETUNREACH`
        pub const NETUNREACH: Self = Self::from_errno(errno::ENETUNREACH);
        /// `ENFILE`
        pub const NFILE: Self = Self::from_errno(errno::ENFILE);
        /// `ENOANO`
        pub const NOANO: Self = Self::from_errno(errno::ENOANO);
        /// `ENOBUFS`
        pub const NOBUFS: Self = Self::from_errno(errno::ENOBUFS);
        /// `ENOCSI`
        pub const NOCSI: Self = Self::from_errno(errno::ENOCSI);
        /// `ENODATA`
        #[doc(alias = "NOATTR")]
        pub const NODATA: Self = Self::from_errno(errno::ENODATA);
        /// `ENODEV`
        pub const NODEV: Self = Self::from_errno(errno::ENODEV);
        /// `ENOENT`
        pub const NOENT: Self = Self::from_errno(errno::ENOENT);
        /// `ENOEXEC`
        pub const NOEXEC: Self = Self::from_errno(errno::ENOEXEC);
        /// `ENOKEY`
        pub const NOKEY: Self = Self::from_errno(errno::ENOKEY);
        /// `ENOLCK`
        pub const NOLCK: Self = Self::from_errno(errno::ENOLCK);
        /// `ENOLINK`
        pub const NOLINK: Self = Self::from_errno(errno::ENOLINK);
        /// `ENOMEDIUM`
        pub const NOMEDIUM: Self = Self::from_errno(errno::ENOMEDIUM);
        /// `ENOMEM`
        pub const NOMEM: Self = Self::from_errno(errno::ENOMEM);
        /// `ENOMSG`
        pub const NOMSG: Self = Self::from_errno(errno::ENOMSG);
        /// `ENONET`
        pub const NONET: Self = Self::from_errno(errno::ENONET);
        /// `ENOPKG`
        pub const NOPKG: Self = Self::from_errno(errno::ENOPKG);
        /// `ENOPROTOOPT`
        pub const NOPROTOOPT: Self = Self::from_errno(errno::ENOPROTOOPT);
        /// `ENOSPC`
        pub const NOSPC: Self = Self::from_errno(errno::ENOSPC);
        /// `ENOSR`
        pub const NOSR: Self = Self::from_errno(errno::ENOSR);
        /// `ENOSTR`
        pub const NOSTR: Self = Self::from_errno(errno::ENOSTR);
        /// `ENOSYS`
        pub const NOSYS: Self = Self::from_errno(errno::ENOSYS);
        /// `ENOTBLK`
        pub const NOTBLK: Self = Self::from_errno(errno::ENOTBLK);
        /// `ENOTCONN`
        pub const NOTCONN: Self = Self::from_errno(errno::ENOTCONN);
        /// `ENOTDIR`
        pub const NOTDIR: Self = Self::from_errno(errno::ENOTDIR);
        /// `ENOTEMPTY`
        pub const NOTEMPTY: Self = Self::from_errno(errno::ENOTEMPTY);
        /// `ENOTNAM`
        pub const NOTNAM: Self = Self::from_errno(errno::ENOTNAM);
        /// `ENOTRECOVERABLE`
        pub const NOTRECOVERABLE: Self = Self::from_errno(errno::ENOTRECOVERABLE);
        /// `ENOTSOCK`
        pub const NOTSOCK: Self = Self::from_errno(errno::ENOTSOCK);
        /// `ENOTSUP`
        // On Linux, `ENOTSUP` has the same value as `EOPNOTSUPP`.
        pub const NOTSUP: Self = Self::from_errno(errno::EOPNOTSUPP);
        /// `ENOTTY`
        pub const NOTTY: Self = Self::from_errno(errno::ENOTTY);
        /// `ENOTUNIQ`
        pub const NOTUNIQ: Self = Self::from_errno(errno::ENOTUNIQ);
        /// `ENXIO`
        pub const NXIO: Self = Self::from_errno(errno::ENXIO);
        /// `EOPNOTSUPP`
        pub const OPNOTSUPP: Self = Self::from_errno(errno::EOPNOTSUPP);
        /// `EOVERFLOW`
        pub const OVERFLOW: Self = Self::from_errno(errno::EOVERFLOW);
        /// `EOWNERDEAD`
        pub const OWNERDEAD: Self = Self::from_errno(errno::EOWNERDEAD);
        /// `EPERM`
        pub const PERM: Self = Self::from_errno(errno::EPERM);
        /// `EPFNOSUPPORT`
        pub const PFNOSUPPORT: Self = Self::from_errno(errno::EPFNOSUPPORT);
        /// `EPIPE`
        pub const PIPE: Self = Self::from_errno(errno::EPIPE);
        /// `EPROTO`
        pub const PROTO: Self = Self::from_errno(errno::EPROTO);
        /// `EPROTONOSUPPORT`
        pub const PROTONOSUPPORT: Self = Self::from_errno(errno::EPROTONOSUPPORT);
        /// `EPROTOTYPE`
        pub const PROTOTYPE: Self = Self::from_errno(errno::EPROTOTYPE);
        /// `ERANGE`
        pub const RANGE: Self = Self::from_errno(errno::ERANGE);
        /// `EREMCHG`
        pub const REMCHG: Self = Self::from_errno(errno::EREMCHG);
        /// `EREMOTE`
        pub const REMOTE: Self = Self::from_errno(errno::EREMOTE);
        /// `EREMOTEIO`
        pub const REMOTEIO: Self = Self::from_errno(errno::EREMOTEIO);
        /// `ERESTART`
        pub const RESTART: Self = Self::from_errno(errno::ERESTART);
        /// `ERFKILL`
        pub const RFKILL: Self = Self::from_errno(errno::ERFKILL);
        /// `EROFS`
        pub const ROFS: Self = Self::from_errno(errno::EROFS);
        /// `ESHUTDOWN`
        pub const SHUTDOWN: Self = Self::from_errno(errno::ESHUTDOWN);
        /// `ESOCKTNOSUPPORT`
        pub const SOCKTNOSUPPORT: Self = Self::from_errno(errno::ESOCKTNOSUPPORT);
        /// `ESPIPE`
        pub const SPIPE: Self = Self::from_errno(errno::ESPIPE);
        /// `ESRCH`
        pub const SRCH: Self = Self::from_errno(errno::ESRCH);
        /// `ESRMNT`
        pub const SRMNT: Self = Self::from_errno(errno::ESRMNT);
        /// `ESTALE`
        pub const STALE: Self = Self::from_errno(errno::ESTALE);
        /// `ESTRPIPE`
        pub const STRPIPE: Self = Self::from_errno(errno::ESTRPIPE);
        /// `ETIME`
        pub const TIME: Self = Self::from_errno(errno::ETIME);
        /// `ETIMEDOUT`
        pub const TIMEDOUT: Self = Self::from_errno(errno::ETIMEDOUT);
        /// `E2BIG`
        #[doc(alias = "2BIG")]
        pub const TOOBIG: Self = Self::from_errno(errno::E2BIG);
        /// `ETOOMANYREFS`
        pub const TOOMANYREFS: Self = Self::from_errno(errno::ETOOMANYREFS);
        /// `ETXTBSY`
        pub const TXTBSY: Self = Self::from_errno(errno::ETXTBSY);
        /// `EUCLEAN`
        pub const UCLEAN: Self = Self::from_errno(errno::EUCLEAN);
        /// `EUNATCH`
        pub const UNATCH: Self = Self::from_errno(errno::EUNATCH);
        /// `EUSERS`
        pub const USERS: Self = Self::from_errno(errno::EUSERS);
        /// `EWOULDBLOCK`
        pub const WOULDBLOCK: Self = Self::from_errno(errno::EWOULDBLOCK);
        /// `EXDEV`
        pub const XDEV: Self = Self::from_errno(errno::EXDEV);
        /// `EXFULL`
        pub const XFULL: Self = Self::from_errno(errno::EXFULL);
    }