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LowFdGuard

zsh::lowfd

Struct LowFdGuard 

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pub struct LowFdGuard { /* private fields */ }
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Occupies every currently-free descriptor below [FIRST_INTERNAL_FD] so that opens performed while it is alive are pushed above the user’s fd range. Releases them on drop.

Descriptors that are ALREADY open are left alone — they may be the user’s (zshrs 3>&1 -c '…' is legal), and stealing them would be the very bug this exists to prevent.

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impl LowFdGuard

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pub fn new() -> Self

Reserve the free low descriptors. Cheap: at most seven dup2 calls onto /dev/null, and only for slots that are actually free.

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impl Default for LowFdGuard

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fn default() -> Self

Returns the “default value” for a type. Read more
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impl Drop for LowFdGuard

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fn drop(&mut self)

Executes the destructor for this type. Read more
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fn pin_drop(self: Pin<&mut Self>)

🔬This is a nightly-only experimental API. (pin_ergonomics)
Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned. Read more

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type ArchivedMetadata = ()

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fn pointer_metadata( _: &<T as ArchivePointee>::ArchivedMetadata, ) -> <T as Pointee>::Metadata

Converts some archived metadata to the pointer metadata for itself.
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Immutably borrows from an owned value. Read more
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impl<ST, DT> CastableFrom<ST, Initialized, Initialized> for DT
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fn from(t: T) -> T

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Calls U::from(self).

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const ALIGN: usize

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type Init = T

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unsafe fn init(init: <T as Pointable>::Init) -> usize

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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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