Enum nix::sys::socket::ControlMessage
source · #[non_exhaustive]pub enum ControlMessage<'a> {
ScmRights(&'a [RawFd]),
}
Available on crate features
socket
and uio
only.Expand description
A type-safe zero-copy wrapper around a single control message, as used with
sendmsg
. More types may be added to this enum; do not exhaustively
pattern-match it.
Variants (Non-exhaustive)§
This enum is marked as non-exhaustive
Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.
ScmRights(&'a [RawFd])
A message of type SCM_RIGHTS
, containing an array of file
descriptors passed between processes.
See the description in the “Ancillary messages” section of the unix(7) man page.
Using multiple ScmRights
messages for a single sendmsg
call isn’t
recommended since it causes platform-dependent behaviour: It might
swallow all but the first ScmRights
message or fail with EINVAL
.
Instead, you can put all fds to be passed into a single ScmRights
message.
Trait Implementations§
source§impl<'a> Clone for ControlMessage<'a>
impl<'a> Clone for ControlMessage<'a>
source§fn clone(&self) -> ControlMessage<'a>
fn clone(&self) -> ControlMessage<'a>
Returns a copy of the value. Read more
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from
source
. Read moresource§impl<'a> Debug for ControlMessage<'a>
impl<'a> Debug for ControlMessage<'a>
source§impl<'a> PartialEq for ControlMessage<'a>
impl<'a> PartialEq for ControlMessage<'a>
source§fn eq(&self, other: &ControlMessage<'a>) -> bool
fn eq(&self, other: &ControlMessage<'a>) -> bool
This method tests for
self
and other
values to be equal, and is used
by ==
.impl<'a> Copy for ControlMessage<'a>
impl<'a> Eq for ControlMessage<'a>
impl<'a> StructuralPartialEq for ControlMessage<'a>
Auto Trait Implementations§
impl<'a> Freeze for ControlMessage<'a>
impl<'a> RefUnwindSafe for ControlMessage<'a>
impl<'a> Send for ControlMessage<'a>
impl<'a> Sync for ControlMessage<'a>
impl<'a> Unpin for ControlMessage<'a>
impl<'a> UnwindSafe for ControlMessage<'a>
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more