#[repr(C)]
pub struct utsname {
    pub sysname: [c_char; 65],
    pub nodename: [c_char; 65],
    pub release: [c_char; 65],
    pub version: [c_char; 65],
    pub machine: [c_char; 65],
    pub domainname: [c_char; 65],
}
§domainname: [c_char; 65]
Performs copy-assignment from 
source. 
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Immutably borrows from an owned value. 
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Mutably borrows from an owned value. 
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Returns the argument unchanged.
Calls U::from(self).
That is, this conversion is whatever the implementation of
From<T> for U chooses to do.
The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.