whoami: use uucore::entries

src/whoami/Cargo.toml

@@ -9,10 +9,13 @@ path = "whoami.rs"
 
 [dependencies]
 getopts = "*"
-libc = "*"
 winapi = "*"
 advapi32-sys = "*"
-uucore = { path="../uucore" }
+
+[dependencies.uucore]
+path = "../uucore"
+default-features = false
+features = ["entries"]
 
 [[bin]]
 name = "whoami"

src/whoami/platform/unix.rs

@@ -2,31 +2,18 @@
  * This file is part of the uutils coreutils package.
  *
  * (c) Jordi Boggiano <j.boggiano@seld.be>
+ * (c) Jian Zeng <anonymousknight96 AT gmail.com>
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
  */
 
-use std::io::{Result, Error};
-use ::libc;
-use uucore::c_types::{c_passwd, getpwuid};
-
-extern {
-    pub fn geteuid() -> libc::uid_t;
-}
+use std::io::Result;
+use uucore::libc::geteuid;
+use uucore::entries::uid2usr;
 
 pub unsafe fn getusername() -> Result<String> {
     // Get effective user id
     let uid = geteuid();
-
-    // Try to find username for uid
-    let passwd: *const c_passwd = getpwuid(uid);
-    if passwd.is_null() {
-        return Err(Error::last_os_error())
-    }
-
-    // Extract username from passwd struct
-    let pw_name: *const libc::c_char = (*passwd).pw_name;
-    let username = String::from_utf8_lossy(::std::ffi::CStr::from_ptr(pw_name).to_bytes()).to_string();
-    Ok(username)
+    uid2usr(uid)
 }

src/whoami/whoami.rs

@@ -12,7 +12,6 @@
 /* last synced with: whoami (GNU coreutils) 8.21 */
 
 extern crate getopts;
-extern crate libc;
 
 #[macro_use]
 extern crate uucore;