FFI is Rust's method of interacting with non-Rust libraries. This trait provides a number of utilities for this purpose.

Structs, Traits, and Enums: Structs CStr, CString (representation of a borrowed C string and an owned C-compatible string respectively), FromBytesWithNullError (error returned from CStr::from_bytes_with_nul), IntoStringError (error returned from CString::into_string to indicate a UTF8 error during a conversion), NulError (returns an error from CString::new indicating a null byte was found in the provided vector), OsStr, and OsString (slices into OS strings).