From 698f8c2f01ea549d77d7dc3338a12e04c11057b9 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 14:02:58 +0200
Subject: Adding upstream version 1.64.0+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 vendor/errno/src/unix.rs | 79 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 79 insertions(+)
 create mode 100644 vendor/errno/src/unix.rs

(limited to 'vendor/errno/src/unix.rs')

diff --git a/vendor/errno/src/unix.rs b/vendor/errno/src/unix.rs
new file mode 100644
index 000000000..820d89748
--- /dev/null
+++ b/vendor/errno/src/unix.rs
@@ -0,0 +1,79 @@
+//! Implementation of `errno` functionality for Unix systems.
+//!
+//! Adapted from `src/libstd/sys/unix/os.rs` in the Rust distribution.
+
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#[cfg(feature = "std")]
+use std::ffi::CStr;
+use libc::c_int;
+#[cfg(feature = "std")]
+use libc::{self, c_char};
+#[cfg(target_os = "dragonfly")]
+use errno_dragonfly::errno_location;
+
+use Errno;
+
+#[cfg(feature = "std")]
+pub fn with_description<F, T>(err: Errno, callback: F) -> T where
+    F: FnOnce(Result<&str, Errno>) -> T
+{
+    let mut buf = [0 as c_char; 1024];
+    unsafe {
+        if strerror_r(err.0, buf.as_mut_ptr(), buf.len() as libc::size_t) < 0 {
+            let fm_err = errno();
+            if fm_err != Errno(libc::ERANGE) {
+                return callback(Err(fm_err));
+            }
+        }
+    }
+    let c_str = unsafe { CStr::from_ptr(buf.as_ptr()) };
+    callback(Ok(&String::from_utf8_lossy(c_str.to_bytes())))
+}
+
+#[cfg(feature = "std")]
+pub const STRERROR_NAME: &'static str = "strerror_r";
+
+pub fn errno() -> Errno {
+    unsafe {
+        Errno(*errno_location())
+    }
+}
+
+pub fn set_errno(Errno(errno): Errno) {
+    unsafe {
+        *errno_location() = errno;
+    }
+}
+
+extern {
+    #[cfg(not(target_os = "dragonfly"))]
+    #[cfg_attr(any(target_os = "macos",
+                   target_os = "ios",
+                   target_os = "freebsd"),
+               link_name = "__error")]
+    #[cfg_attr(any(target_os = "openbsd",
+                   target_os = "netbsd",
+                   target_os = "bitrig",
+                   target_os = "android"),
+               link_name = "__errno")]
+    #[cfg_attr(any(target_os = "solaris",
+                   target_os = "illumos"),
+               link_name = "___errno")]
+    #[cfg_attr(target_os = "linux",
+               link_name = "__errno_location")]
+    fn errno_location() -> *mut c_int;
+
+    #[cfg(feature = "std")]
+    #[cfg_attr(target_os = "linux", link_name = "__xpg_strerror_r")]
+    fn strerror_r(errnum: c_int, buf: *mut c_char,
+                  buflen: libc::size_t) -> c_int;
+}
-- 
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