Struct wasi_common::file::FileCaps

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pub struct FileCaps { /* private fields */ }

Implementations§

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pub const fn empty() -> Self

Returns an empty set of flags.

Examples found in repository ?

src/snapshots/preview_1.rs (line 1223)

    fn from(rights: &types::Rights) -> FileCaps {
        let mut caps = FileCaps::empty();
        if rights.contains(types::Rights::FD_DATASYNC) {
            caps = caps | FileCaps::DATASYNC;
        }
        if rights.contains(types::Rights::FD_READ) {
            caps = caps | FileCaps::READ;
        }
        if rights.contains(types::Rights::FD_SEEK) {
            caps = caps | FileCaps::SEEK;
        }
        if rights.contains(types::Rights::FD_FDSTAT_SET_FLAGS) {
            caps = caps | FileCaps::FDSTAT_SET_FLAGS;
        }
        if rights.contains(types::Rights::FD_SYNC) {
            caps = caps | FileCaps::SYNC;
        }
        if rights.contains(types::Rights::FD_TELL) {
            caps = caps | FileCaps::TELL;
        }
        if rights.contains(types::Rights::FD_WRITE) {
            caps = caps | FileCaps::WRITE;
        }
        if rights.contains(types::Rights::FD_ADVISE) {
            caps = caps | FileCaps::ADVISE;
        }
        if rights.contains(types::Rights::FD_ALLOCATE) {
            caps = caps | FileCaps::ALLOCATE;
        }
        if rights.contains(types::Rights::FD_FILESTAT_GET) {
            caps = caps | FileCaps::FILESTAT_GET;
        }
        if rights.contains(types::Rights::FD_FILESTAT_SET_SIZE) {
            caps = caps | FileCaps::FILESTAT_SET_SIZE;
        }
        if rights.contains(types::Rights::FD_FILESTAT_SET_TIMES) {
            caps = caps | FileCaps::FILESTAT_SET_TIMES;
        }
        if rights.contains(types::Rights::POLL_FD_READWRITE) {
            caps = caps | FileCaps::POLL_READWRITE;
        }
        caps
    }

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pub const fn all() -> Self

Returns the set containing all flags.

Examples found in repository ?

src/ctx.rs (line 104)

    fn stdio_rights(f: &mut dyn WasiFile) -> FileCaps {
        let mut rights = FileCaps::all();

        // If `f` is a tty, restrict the `tell` and `seek` capabilities, so
        // that wasi-libc's `isatty` correctly detects the file descriptor
        // as a tty.
        if f.isatty() {
            rights &= !(FileCaps::TELL | FileCaps::SEEK);
        }

        rights
    }

    pub fn push_preopened_dir(
        &mut self,
        dir: Box<dyn WasiDir>,
        path: impl AsRef<Path>,
    ) -> Result<(), Error> {
        let caps = DirCaps::all();
        let file_caps = FileCaps::all();
        self.table().push(Box::new(DirEntry::new(
            caps,
            file_caps,
            Some(path.as_ref().to_owned()),
            dir,
        )))?;
        Ok(())
    }

source

pub const fn bits(&self) -> u32

Returns the raw value of the flags currently stored.

source

pub const fn from_bits(bits: u32) -> Option<Self>

Convert from underlying bit representation, unless that representation contains bits that do not correspond to a flag.

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pub const fn from_bits_truncate(bits: u32) -> Self

Convert from underlying bit representation, dropping any bits that do not correspond to flags.

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pub const unsafe fn from_bits_unchecked(bits: u32) -> Self

Convert from underlying bit representation, preserving all bits (even those not corresponding to a defined flag).

Safety

The caller of the bitflags! macro can chose to allow or disallow extra bits for their bitflags type.

The caller of from_bits_unchecked() has to ensure that all bits correspond to a defined flag or that extra bits are valid for this bitflags type.

source

pub const fn is_empty(&self) -> bool

Returns true if no flags are currently stored.

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pub const fn is_all(&self) -> bool

Returns true if all flags are currently set.

source

pub const fn intersects(&self, other: Self) -> bool

Returns true if there are flags common to both self and other.

Examples found in repository ?

src/file.rs (line 242)

    pub fn capable_of(&self, caps: FileCaps) -> Result<(), Error> {
        if self.caps.contains(caps) {
            Ok(())
        } else {
            let missing = caps & !self.caps;
            let err = if missing.intersects(FileCaps::READ | FileCaps::WRITE) {
                // `EBADF` is a little surprising here because it's also used
                // for unknown-file-descriptor errors, but it's what POSIX uses
                // in this situation.
                Error::badf()
            } else {
                Error::perm()
            };
            Err(err.context(format!("desired rights {:?}, has {:?}", caps, self.caps)))
        }
    }

source

pub const fn contains(&self, other: Self) -> bool

Returns true if all of the flags in other are contained within self.

Examples found in repository ?

src/dir.rs (line 135)

    pub fn capable_of_file(&self, caps: FileCaps) -> Result<(), Error> {
        if self.file_caps.contains(caps) {
            Ok(())
        } else {
            Err(Error::perm().context(format!(
                "desired rights {:?}, has {:?}",
                caps, self.file_caps
            )))
        }
    }

More examples

Hide additional examples

src/file.rs (line 238)

    pub fn capable_of(&self, caps: FileCaps) -> Result<(), Error> {
        if self.caps.contains(caps) {
            Ok(())
        } else {
            let missing = caps & !self.caps;
            let err = if missing.intersects(FileCaps::READ | FileCaps::WRITE) {
                // `EBADF` is a little surprising here because it's also used
                // for unknown-file-descriptor errors, but it's what POSIX uses
                // in this situation.
                Error::badf()
            } else {
                Error::perm()
            };
            Err(err.context(format!("desired rights {:?}, has {:?}", caps, self.caps)))
        }
    }

src/snapshots/preview_1.rs (line 706)

    async fn path_open<'a>(
        &mut self,
        dirfd: types::Fd,
        dirflags: types::Lookupflags,
        path: &GuestPtr<'a, str>,
        oflags: types::Oflags,
        fs_rights_base: types::Rights,
        fs_rights_inheriting: types::Rights,
        fdflags: types::Fdflags,
    ) -> Result<types::Fd, Error> {
        let table = self.table();
        let dirfd = u32::from(dirfd);
        if table.is::<FileEntry>(dirfd) {
            return Err(Error::not_dir());
        }
        let dir_entry = table.get_dir(dirfd)?;

        let symlink_follow = dirflags.contains(types::Lookupflags::SYMLINK_FOLLOW);

        let oflags = OFlags::from(&oflags);
        let fdflags = FdFlags::from(fdflags);
        let path = path.as_str()?.expect("cannot use with shared memories; see https://github.com/bytecodealliance/wasmtime/issues/5235 (TODO)");
        if oflags.contains(OFlags::DIRECTORY) {
            if oflags.contains(OFlags::CREATE)
                || oflags.contains(OFlags::EXCLUSIVE)
                || oflags.contains(OFlags::TRUNCATE)
            {
                return Err(Error::invalid_argument().context("directory oflags"));
            }
            let dir_caps = dir_entry.child_dir_caps(DirCaps::from(&fs_rights_base));
            let file_caps = dir_entry.child_file_caps(FileCaps::from(&fs_rights_inheriting));
            let dir = dir_entry.get_cap(DirCaps::OPEN)?;
            let child_dir = dir.open_dir(symlink_follow, path.deref()).await?;
            drop(dir);
            let fd = table.push(Box::new(DirEntry::new(
                dir_caps, file_caps, None, child_dir,
            )))?;
            Ok(types::Fd::from(fd))
        } else {
            let mut required_caps = DirCaps::OPEN;
            if oflags.contains(OFlags::CREATE) {
                required_caps = required_caps | DirCaps::CREATE_FILE;
            }

            let file_caps = dir_entry.child_file_caps(FileCaps::from(&fs_rights_base));
            let dir = dir_entry.get_cap(required_caps)?;
            let read = file_caps.contains(FileCaps::READ);
            let write = file_caps.contains(FileCaps::WRITE)
                || file_caps.contains(FileCaps::ALLOCATE)
                || file_caps.contains(FileCaps::FILESTAT_SET_SIZE);
            let file = dir
                .open_file(symlink_follow, path.deref(), oflags, read, write, fdflags)
                .await?;
            drop(dir);
            let fd = table.push(Box::new(FileEntry::new(file_caps, file)))?;
            Ok(types::Fd::from(fd))
        }
    }

    async fn path_readlink<'a>(
        &mut self,
        dirfd: types::Fd,
        path: &GuestPtr<'a, str>,
        buf: &GuestPtr<'a, u8>,
        buf_len: types::Size,
    ) -> Result<types::Size, Error> {
        let link = self
            .table()
            .get_dir(u32::from(dirfd))?
            .get_cap(DirCaps::READLINK)?
            .read_link(path.as_str()?.expect("cannot use with shared memories; see https://github.com/bytecodealliance/wasmtime/issues/5235 (TODO)").deref())
            .await?
            .into_os_string()
            .into_string()
            .map_err(|_| Error::illegal_byte_sequence().context("link contents"))?;
        let link_bytes = link.as_bytes();
        let link_len = link_bytes.len();
        if link_len > buf_len as usize {
            return Err(Error::range());
        }
        let mut buf = buf
            .as_array(link_len as u32)
            .as_slice_mut()?
            .expect("cannot use with shared memories; see https://github.com/bytecodealliance/wasmtime/issues/5235 (TODO)");
        buf.copy_from_slice(link_bytes);
        Ok(link_len as types::Size)
    }

    async fn path_remove_directory<'a>(
        &mut self,
        dirfd: types::Fd,
        path: &GuestPtr<'a, str>,
    ) -> Result<(), Error> {
        self.table()
            .get_dir(u32::from(dirfd))?
            .get_cap(DirCaps::REMOVE_DIRECTORY)?
            .remove_dir(path.as_str()?.expect("cannot use with shared memories; see https://github.com/bytecodealliance/wasmtime/issues/5235 (TODO)").deref())
            .await
    }

    async fn path_rename<'a>(
        &mut self,
        src_fd: types::Fd,
        src_path: &GuestPtr<'a, str>,
        dest_fd: types::Fd,
        dest_path: &GuestPtr<'a, str>,
    ) -> Result<(), Error> {
        let table = self.table();
        let src_dir = table
            .get_dir(u32::from(src_fd))?
            .get_cap(DirCaps::RENAME_SOURCE)?;
        let dest_dir = table
            .get_dir(u32::from(dest_fd))?
            .get_cap(DirCaps::RENAME_TARGET)?;
        src_dir
            .rename(
                src_path.as_str()?.expect("cannot use with shared memories; see https://github.com/bytecodealliance/wasmtime/issues/5235 (TODO)").deref(),
                dest_dir.deref(),
                dest_path.as_str()?.expect("cannot use with shared memories; see https://github.com/bytecodealliance/wasmtime/issues/5235 (TODO)").deref(),
            )
            .await
    }

    async fn path_symlink<'a>(
        &mut self,
        src_path: &GuestPtr<'a, str>,
        dirfd: types::Fd,
        dest_path: &GuestPtr<'a, str>,
    ) -> Result<(), Error> {
        self.table()
            .get_dir(u32::from(dirfd))?
            .get_cap(DirCaps::SYMLINK)?
            .symlink(src_path.as_str()?.expect("cannot use with shared memories; see https://github.com/bytecodealliance/wasmtime/issues/5235 (TODO)").deref(), dest_path.as_str()?.expect("cannot use with shared memories; see https://github.com/bytecodealliance/wasmtime/issues/5235 (TODO)").deref())
            .await
    }

    async fn path_unlink_file<'a>(
        &mut self,
        dirfd: types::Fd,
        path: &GuestPtr<'a, str>,
    ) -> Result<(), Error> {
        self.table()
            .get_dir(u32::from(dirfd))?
            .get_cap(DirCaps::UNLINK_FILE)?
            .unlink_file(path.as_str()?
            .expect("cannot use with shared memories; see https://github.com/bytecodealliance/wasmtime/issues/5235 (TODO)").deref())
            .await
    }

    async fn poll_oneoff<'a>(
        &mut self,
        subs: &GuestPtr<'a, types::Subscription>,
        events: &GuestPtr<'a, types::Event>,
        nsubscriptions: types::Size,
    ) -> Result<types::Size, Error> {
        if nsubscriptions == 0 {
            return Err(Error::invalid_argument().context("nsubscriptions must be nonzero"));
        }

        // Special-case a `poll_oneoff` which is just sleeping on a single
        // relative timer event, such as what WASI libc uses to implement sleep
        // functions. This supports all clock IDs, because POSIX says that
        // `clock_settime` doesn't effect relative sleeps.
        if nsubscriptions == 1 {
            let sub = subs.read()?;
            if let types::SubscriptionU::Clock(clocksub) = sub.u {
                if !clocksub
                    .flags
                    .contains(types::Subclockflags::SUBSCRIPTION_CLOCK_ABSTIME)
                {
                    self.sched
                        .sleep(Duration::from_nanos(clocksub.timeout))
                        .await?;
                    events.write(types::Event {
                        userdata: sub.userdata,
                        error: types::Errno::Success,
                        type_: types::Eventtype::Clock,
                        fd_readwrite: fd_readwrite_empty(),
                    })?;
                    return Ok(1);
                }
            }
        }

        let table = &mut self.table;
        // We need these refmuts to outlive Poll, which will hold the &mut dyn WasiFile inside
        let mut read_refs: Vec<(&dyn WasiFile, Userdata)> = Vec::new();
        let mut write_refs: Vec<(&dyn WasiFile, Userdata)> = Vec::new();
        let mut poll = Poll::new();

        let subs = subs.as_array(nsubscriptions);
        for sub_elem in subs.iter() {
            let sub_ptr = sub_elem?;
            let sub = sub_ptr.read()?;
            match sub.u {
                types::SubscriptionU::Clock(clocksub) => match clocksub.id {
                    types::Clockid::Monotonic => {
                        let clock = self.clocks.monotonic.deref();
                        let precision = Duration::from_nanos(clocksub.precision);
                        let duration = Duration::from_nanos(clocksub.timeout);
                        let deadline = if clocksub
                            .flags
                            .contains(types::Subclockflags::SUBSCRIPTION_CLOCK_ABSTIME)
                        {
                            self.clocks
                                .creation_time
                                .checked_add(duration)
                                .ok_or_else(|| Error::overflow().context("deadline"))?
                        } else {
                            clock
                                .now(precision)
                                .checked_add(duration)
                                .ok_or_else(|| Error::overflow().context("deadline"))?
                        };
                        poll.subscribe_monotonic_clock(
                            clock,
                            deadline,
                            precision,
                            sub.userdata.into(),
                        )
                    }
                    types::Clockid::Realtime => {
                        // POSIX specifies that functions like `nanosleep` and others use the
                        // `REALTIME` clock. But it also says that `clock_settime` has no effect
                        // on threads waiting in these functions. MONOTONIC should always have
                        // resolution at least as good as REALTIME, so we can translate a
                        // non-absolute `REALTIME` request into a `MONOTONIC` request.
                        let clock = self.clocks.monotonic.deref();
                        let precision = Duration::from_nanos(clocksub.precision);
                        let duration = Duration::from_nanos(clocksub.timeout);
                        let deadline = if clocksub
                            .flags
                            .contains(types::Subclockflags::SUBSCRIPTION_CLOCK_ABSTIME)
                        {
                            return Err(Error::not_supported());
                        } else {
                            clock
                                .now(precision)
                                .checked_add(duration)
                                .ok_or_else(|| Error::overflow().context("deadline"))?
                        };
                        poll.subscribe_monotonic_clock(
                            clock,
                            deadline,
                            precision,
                            sub.userdata.into(),
                        )
                    }
                    _ => Err(Error::invalid_argument()
                        .context("timer subscriptions only support monotonic timer"))?,
                },
                types::SubscriptionU::FdRead(readsub) => {
                    let fd = readsub.file_descriptor;
                    let file_ref = table
                        .get_file(u32::from(fd))?
                        .get_cap(FileCaps::POLL_READWRITE)?;
                    read_refs.push((file_ref, sub.userdata.into()));
                }
                types::SubscriptionU::FdWrite(writesub) => {
                    let fd = writesub.file_descriptor;
                    let file_ref = table
                        .get_file(u32::from(fd))?
                        .get_cap(FileCaps::POLL_READWRITE)?;
                    write_refs.push((file_ref, sub.userdata.into()));
                }
            }
        }

        for (f, ud) in read_refs.iter_mut() {
            poll.subscribe_read(*f, *ud);
        }
        for (f, ud) in write_refs.iter_mut() {
            poll.subscribe_write(*f, *ud);
        }

        self.sched.poll_oneoff(&mut poll).await?;

        let results = poll.results();
        let num_results = results.len();
        assert!(
            num_results <= nsubscriptions as usize,
            "results exceeds subscriptions"
        );
        let events = events.as_array(
            num_results
                .try_into()
                .expect("not greater than nsubscriptions"),
        );
        for ((result, userdata), event_elem) in results.into_iter().zip(events.iter()) {
            let event_ptr = event_elem?;
            let userdata: types::Userdata = userdata.into();
            event_ptr.write(match result {
                SubscriptionResult::Read(r) => {
                    let type_ = types::Eventtype::FdRead;
                    match r {
                        Ok((nbytes, flags)) => types::Event {
                            userdata,
                            error: types::Errno::Success,
                            type_,
                            fd_readwrite: types::EventFdReadwrite {
                                nbytes,
                                flags: types::Eventrwflags::from(&flags),
                            },
                        },
                        Err(e) => types::Event {
                            userdata,
                            error: e.downcast().map_err(Error::trap)?,
                            type_,
                            fd_readwrite: fd_readwrite_empty(),
                        },
                    }
                }
                SubscriptionResult::Write(r) => {
                    let type_ = types::Eventtype::FdWrite;
                    match r {
                        Ok((nbytes, flags)) => types::Event {
                            userdata,
                            error: types::Errno::Success,
                            type_,
                            fd_readwrite: types::EventFdReadwrite {
                                nbytes,
                                flags: types::Eventrwflags::from(&flags),
                            },
                        },
                        Err(e) => types::Event {
                            userdata,
                            error: e.downcast().map_err(Error::trap)?,
                            type_,
                            fd_readwrite: fd_readwrite_empty(),
                        },
                    }
                }
                SubscriptionResult::MonotonicClock(r) => {
                    let type_ = types::Eventtype::Clock;
                    types::Event {
                        userdata,
                        error: match r {
                            Ok(()) => types::Errno::Success,
                            Err(e) => e.downcast().map_err(Error::trap)?,
                        },
                        type_,
                        fd_readwrite: fd_readwrite_empty(),
                    }
                }
            })?;
        }

        Ok(num_results.try_into().expect("results fit into memory"))
    }

    async fn proc_exit(&mut self, status: types::Exitcode) -> anyhow::Error {
        // Check that the status is within WASI's range.
        if status < 126 {
            I32Exit(status as i32).into()
        } else {
            anyhow::Error::msg("exit with invalid exit status outside of [0..126)")
        }
    }

    async fn proc_raise(&mut self, _sig: types::Signal) -> Result<(), Error> {
        Err(Error::trap(anyhow::Error::msg("proc_raise unsupported")))
    }

    async fn sched_yield(&mut self) -> Result<(), Error> {
        self.sched.sched_yield().await
    }

    async fn random_get<'a>(
        &mut self,
        buf: &GuestPtr<'a, u8>,
        buf_len: types::Size,
    ) -> Result<(), Error> {
        let mut buf = buf
            .as_array(buf_len)
            .as_slice_mut()?
            .expect("cannot use with shared memories; see https://github.com/bytecodealliance/wasmtime/issues/5235 (TODO)");
        self.random.try_fill_bytes(buf.deref_mut())?;
        Ok(())
    }

    async fn sock_accept(
        &mut self,
        fd: types::Fd,
        flags: types::Fdflags,
    ) -> Result<types::Fd, Error> {
        let table = self.table();
        let f = table
            .get_file_mut(u32::from(fd))?
            .get_cap_mut(FileCaps::READ)?;

        let file = f.sock_accept(FdFlags::from(flags)).await?;
        let file_caps = FileCaps::READ
            | FileCaps::WRITE
            | FileCaps::FDSTAT_SET_FLAGS
            | FileCaps::POLL_READWRITE
            | FileCaps::FILESTAT_GET;

        let fd = table.push(Box::new(FileEntry::new(file_caps, file)))?;
        Ok(types::Fd::from(fd))
    }

    async fn sock_recv<'a>(
        &mut self,
        fd: types::Fd,
        ri_data: &types::IovecArray<'a>,
        ri_flags: types::Riflags,
    ) -> Result<(types::Size, types::Roflags), Error> {
        let f = self
            .table()
            .get_file_mut(u32::from(fd))?
            .get_cap_mut(FileCaps::READ)?;

        let mut guest_slices: Vec<wiggle::GuestSliceMut<u8>> =
            ri_data
                .iter()
                .map(|iov_ptr| {
                    let iov_ptr = iov_ptr?;
                    let iov: types::Iovec = iov_ptr.read()?;
                    Ok(iov.buf.as_array(iov.buf_len).as_slice_mut()?.expect(
                        "cannot use with shared memories; see https://github.com/bytecodealliance/wasmtime/issues/5235 (TODO)",
                    ))
                })
                .collect::<Result<_, Error>>()?;

        let mut ioslices: Vec<IoSliceMut> = guest_slices
            .iter_mut()
            .map(|s| IoSliceMut::new(&mut *s))
            .collect();

        let (bytes_read, roflags) = f.sock_recv(&mut ioslices, RiFlags::from(ri_flags)).await?;
        Ok((types::Size::try_from(bytes_read)?, roflags.into()))
    }

    async fn sock_send<'a>(
        &mut self,
        fd: types::Fd,
        si_data: &types::CiovecArray<'a>,
        _si_flags: types::Siflags,
    ) -> Result<types::Size, Error> {
        let f = self
            .table()
            .get_file_mut(u32::from(fd))?
            .get_cap_mut(FileCaps::WRITE)?;

        let guest_slices: Vec<wiggle::GuestSlice<u8>> = si_data
            .iter()
            .map(|iov_ptr| {
                let iov_ptr = iov_ptr?;
                let iov: types::Ciovec = iov_ptr.read()?;
                Ok(iov
                    .buf
                    .as_array(iov.buf_len)
                    .as_slice()?
                    .expect("cannot use with shared memories; see https://github.com/bytecodealliance/wasmtime/issues/5235 (TODO)"))
            })
            .collect::<Result<_, Error>>()?;

        let ioslices: Vec<IoSlice> = guest_slices
            .iter()
            .map(|s| IoSlice::new(s.deref()))
            .collect();
        let bytes_written = f.sock_send(&ioslices, SiFlags::empty()).await?;

        Ok(types::Size::try_from(bytes_written)?)
    }

    async fn sock_shutdown(&mut self, fd: types::Fd, how: types::Sdflags) -> Result<(), Error> {
        let f = self
            .table()
            .get_file_mut(u32::from(fd))?
            .get_cap_mut(FileCaps::FDSTAT_SET_FLAGS)?;

        f.sock_shutdown(SdFlags::from(how)).await
    }
}

impl From<types::Advice> for Advice {
    fn from(advice: types::Advice) -> Advice {
        match advice {
            types::Advice::Normal => Advice::Normal,
            types::Advice::Sequential => Advice::Sequential,
            types::Advice::Random => Advice::Random,
            types::Advice::Willneed => Advice::WillNeed,
            types::Advice::Dontneed => Advice::DontNeed,
            types::Advice::Noreuse => Advice::NoReuse,
        }
    }
}

impl From<&FdStat> for types::Fdstat {
    fn from(fdstat: &FdStat) -> types::Fdstat {
        types::Fdstat {
            fs_filetype: types::Filetype::from(&fdstat.filetype),
            fs_rights_base: types::Rights::from(&fdstat.caps),
            fs_rights_inheriting: types::Rights::empty(),
            fs_flags: types::Fdflags::from(fdstat.flags),
        }
    }
}

impl From<&DirFdStat> for types::Fdstat {
    fn from(dirstat: &DirFdStat) -> types::Fdstat {
        let fs_rights_base = types::Rights::from(&dirstat.dir_caps);
        let fs_rights_inheriting = types::Rights::from(&dirstat.file_caps) | fs_rights_base;
        types::Fdstat {
            fs_filetype: types::Filetype::Directory,
            fs_rights_base,
            fs_rights_inheriting,
            fs_flags: types::Fdflags::empty(),
        }
    }
}

// FileCaps can always be represented as wasi Rights
impl From<&FileCaps> for types::Rights {
    fn from(caps: &FileCaps) -> types::Rights {
        let mut rights = types::Rights::empty();
        if caps.contains(FileCaps::DATASYNC) {
            rights = rights | types::Rights::FD_DATASYNC;
        }
        if caps.contains(FileCaps::READ) {
            rights = rights | types::Rights::FD_READ;
        }
        if caps.contains(FileCaps::SEEK) {
            rights = rights | types::Rights::FD_SEEK;
        }
        if caps.contains(FileCaps::FDSTAT_SET_FLAGS) {
            rights = rights | types::Rights::FD_FDSTAT_SET_FLAGS;
        }
        if caps.contains(FileCaps::SYNC) {
            rights = rights | types::Rights::FD_SYNC;
        }
        if caps.contains(FileCaps::TELL) {
            rights = rights | types::Rights::FD_TELL;
        }
        if caps.contains(FileCaps::WRITE) {
            rights = rights | types::Rights::FD_WRITE;
        }
        if caps.contains(FileCaps::ADVISE) {
            rights = rights | types::Rights::FD_ADVISE;
        }
        if caps.contains(FileCaps::ALLOCATE) {
            rights = rights | types::Rights::FD_ALLOCATE;
        }
        if caps.contains(FileCaps::FILESTAT_GET) {
            rights = rights | types::Rights::FD_FILESTAT_GET;
        }
        if caps.contains(FileCaps::FILESTAT_SET_SIZE) {
            rights = rights | types::Rights::FD_FILESTAT_SET_SIZE;
        }
        if caps.contains(FileCaps::FILESTAT_SET_TIMES) {
            rights = rights | types::Rights::FD_FILESTAT_SET_TIMES;
        }
        if caps.contains(FileCaps::POLL_READWRITE) {
            rights = rights | types::Rights::POLL_FD_READWRITE;
        }
        rights
    }

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pub fn insert(&mut self, other: Self)

Inserts the specified flags in-place.

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pub fn remove(&mut self, other: Self)

Removes the specified flags in-place.

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pub fn toggle(&mut self, other: Self)

Toggles the specified flags in-place.

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pub fn set(&mut self, other: Self, value: bool)

Inserts or removes the specified flags depending on the passed value.

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pub const fn intersection(self, other: Self) -> Self

Returns the intersection between the flags in self and other.

Specifically, the returned set contains only the flags which are present in both self and other.

This is equivalent to using the & operator (e.g. ops::BitAnd), as in flags & other.

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pub const fn union(self, other: Self) -> Self

Returns the union of between the flags in self and other.

Specifically, the returned set contains all flags which are present in either self or other, including any which are present in both (see Self::symmetric_difference if that is undesirable).

This is equivalent to using the | operator (e.g. ops::BitOr), as in flags | other.

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pub const fn difference(self, other: Self) -> Self

Returns the difference between the flags in self and other.

Specifically, the returned set contains all flags present in self, except for the ones present in other.

It is also conceptually equivalent to the “bit-clear” operation: flags & !other (and this syntax is also supported).

This is equivalent to using the - operator (e.g. ops::Sub), as in flags - other.

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pub const fn symmetric_difference(self, other: Self) -> Self

Returns the symmetric difference between the flags in self and other.

Specifically, the returned set contains the flags present which are present in self or other, but that are not present in both. Equivalently, it contains the flags present in exactly one of the sets self and other.

This is equivalent to using the ^ operator (e.g. ops::BitXor), as in flags ^ other.

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