From 955fcc7a522b8ee0b961c07c8cf31d3681035b2f Mon Sep 17 00:00:00 2001
From: xtqqczze <45661989+xtqqczze@users.noreply.github.com>
Date: Thu, 18 Dec 2025 10:56:09 +0000
Subject: [PATCH] sort: remove unsafe

---
 src/uu/sort/Cargo.toml  |  4 +++-
 src/uu/sort/src/sort.rs | 15 +++++----------
 2 files changed, 8 insertions(+), 11 deletions(-)

diff --git a/src/uu/sort/Cargo.toml b/src/uu/sort/Cargo.toml
index e65f70d5a..184f6776b 100644
--- a/src/uu/sort/Cargo.toml
+++ b/src/uu/sort/Cargo.toml
@@ -36,7 +36,9 @@ thiserror = { workspace = true }
 unicode-width = { workspace = true }
 uucore = { workspace = true, features = ["fs", "parser-size", "version-cmp"] }
 fluent = { workspace = true }
-nix = { workspace = true }
+
+[target.'cfg(unix)'.dependencies]
+nix = { workspace = true, features = ["resource"] }
 
 [dev-dependencies]
 divan = { workspace = true }
diff --git a/src/uu/sort/src/sort.rs b/src/uu/sort/src/sort.rs
index c25ef4814..3b967d042 100644
--- a/src/uu/sort/src/sort.rs
+++ b/src/uu/sort/src/sort.rs
@@ -25,8 +25,6 @@ use clap::{Arg, ArgAction, Command};
 use custom_str_cmp::custom_str_cmp;
 use ext_sort::ext_sort;
 use fnv::FnvHasher;
-#[cfg(target_os = "linux")]
-use nix::libc::{RLIMIT_NOFILE, getrlimit, rlimit};
 use numeric_str_cmp::{NumInfo, NumInfoParseSettings, human_numeric_str_cmp, numeric_str_cmp};
 use rand::{Rng, rng};
 use rayon::prelude::*;
@@ -1075,14 +1073,11 @@ fn make_sort_mode_arg(mode: &'static str, short: char, help: String) -> Arg {
 
 #[cfg(target_os = "linux")]
 fn get_rlimit() -> UResult<usize> {
-    let mut limit = rlimit {
-        rlim_cur: 0,
-        rlim_max: 0,
-    };
-    match unsafe { getrlimit(RLIMIT_NOFILE, &raw mut limit) } {
-        0 => Ok(limit.rlim_cur as usize),
-        _ => Err(UUsageError::new(2, translate!("sort-failed-fetch-rlimit"))),
-    }
+    use nix::sys::resource::{Resource, getrlimit};
+
+    getrlimit(Resource::RLIMIT_NOFILE)
+        .map(|(rlim_cur, _)| rlim_cur as usize)
+        .map_err(|_| UUsageError::new(2, translate!("sort-failed-fetch-rlimit")))
 }
 
 const STDIN_FILE: &str = "-";