#[repr(C)]
pub struct ipc_perm {
    pub __key: key_t,
    pub uid: uid_t,
    pub gid: gid_t,
    pub cuid: uid_t,
    pub cgid: gid_t,
    pub mode: c_ushort,
    pub __seq: c_ushort,
    /* private fields */
}
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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.