32 lines
1.1 KiB
Rust
32 lines
1.1 KiB
Rust
/*
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* Copyright (c) 2024 Emma Tebibyte <emma@tebibyte.media>
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* SPDX-License-Identifier: FSFAP
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*
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* Copying and distribution of this file, with or without modification, are
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* permitted in any medium without royalty provided the copyright notice and
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* this notice are preserved. This file is offered as-is, without any warranty.
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*/
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use std::ffi::{ c_int, c_char, CStr };
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pub trait StrError { fn strerror(&self) -> String; }
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impl StrError for std::io::Error {
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/* wrapper function for use in Rust */
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fn strerror(&self) -> String {
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/* Get the raw OS error. If it’s None, what the hell is going on‽ */
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let errno = self.raw_os_error().unwrap_or(0) as c_int;
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/* Get a CStr from the error message so that it’s referenced and then
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* convert it to an owned value. If the string is not valid UTF-8,
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* return that error instead. */
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match unsafe { CStr::from_ptr(strerror(errno)) }.to_str() {
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Ok(s) => s.to_owned(), // yay!! :D
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Err(e) => e.to_string(), // awww :(
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}
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}
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}
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/* binding to strerror(3p) */
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extern "C" { fn strerror(errnum: c_int) -> *mut c_char; }
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