use our getegid & geteuid wrappers function instead of libc calls

src/uu/install/src/install.rs

@@ -19,7 +19,6 @@ use uucore::mode::get_umask;
 use uucore::perms::{wrap_chown, Verbosity, VerbosityLevel};
 use uucore::{format_usage, help_about, help_usage, show, show_error, show_if_err, uio_error};
 
-use libc::{getegid, geteuid};
 use std::error::Error;
 use std::fmt::{Debug, Display};
 use std::fs;
@@ -29,6 +28,8 @@ use std::os::unix::fs::MetadataExt;
 use std::os::unix::prelude::OsStrExt;
 use std::path::{Path, PathBuf, MAIN_SEPARATOR};
 use std::process;
+#[cfg(not(target_os = "windows"))]
+use uucore::process::{getegid, geteuid};
 
 const DEFAULT_MODE: u32 = 0o755;
 const DEFAULT_STRIP_PROGRAM: &str = "strip";
@@ -959,10 +960,8 @@ fn need_copy(from: &Path, to: &Path, b: &Behavior) -> UResult<bool> {
         }
     } else {
         #[cfg(not(target_os = "windows"))]
-        unsafe {
-            if to_meta.uid() != geteuid() || to_meta.gid() != getegid() {
-                return Ok(true);
-            }
+        if to_meta.uid() != geteuid() || to_meta.gid() != getegid() {
+            return Ok(true);
         }
     }
 

src/uu/test/Cargo.toml

@@ -17,7 +17,7 @@ path = "src/test.rs"
 [dependencies]
 clap = { workspace = true }
 libc = { workspace = true }
-uucore = { workspace = true }
+uucore = { workspace = true, features = ["process"] }
 
 [target.'cfg(target_os = "redox")'.dependencies]
 redox_syscall = { workspace = true }

src/uu/test/src/test.rs

@@ -17,6 +17,8 @@ use std::fs;
 use std::os::unix::fs::MetadataExt;
 use uucore::display::Quotable;
 use uucore::error::{UResult, USimpleError};
+#[cfg(not(windows))]
+use uucore::process::{getegid, geteuid};
 use uucore::{format_usage, help_about, help_section};
 
 const ABOUT: &str = help_about!("test.md");
@@ -276,7 +278,7 @@ fn path(path: &OsStr, condition: &PathCondition) -> bool {
 
     let geteuid = || {
         #[cfg(not(target_os = "redox"))]
-        let euid = unsafe { libc::geteuid() };
+        let euid = geteuid();
         #[cfg(target_os = "redox")]
         let euid = syscall::geteuid().unwrap() as u32;
 
@@ -285,7 +287,7 @@ fn path(path: &OsStr, condition: &PathCondition) -> bool {
 
     let getegid = || {
         #[cfg(not(target_os = "redox"))]
-        let egid = unsafe { libc::getegid() };
+        let egid = getegid();
         #[cfg(target_os = "redox")]
         let egid = syscall::getegid().unwrap() as u32;
 

src/uu/whoami/src/platform/unix.rs

@@ -7,10 +7,9 @@ use std::ffi::OsString;
 use std::io;
 
 use uucore::entries::uid2usr;
+use uucore::process::geteuid;
 
 pub fn get_username() -> io::Result<OsString> {
-    // SAFETY: getuid() does nothing with memory and is always successful.
-    let uid = unsafe { libc::geteuid() };
     // uid2usr should arguably return an OsString but currently doesn't
-    uid2usr(uid).map(Into::into)
+    uid2usr(geteuid()).map(Into::into)
 }