pinky: obtain correct timestamp

src/pinky/pinky.rs

@@ -373,8 +373,6 @@ impl Pinky {
             }
         }
 
-        // WARNING: Because of the definition of `struct utmp`,
-        // pinky cannot get the correct value of utmp.ut_tv
         print!(" {}", time_string(&ut));
 
         if self.include_where && ut.ut_host[0] != 0 {

src/pinky/utmp.rs

@@ -6,37 +6,30 @@
 // file that was distributed with this source code.
 //
 extern crate uucore;
-use uucore::utmpx::c_utmp;
+use uucore::utmpx;
 
 use std::ptr;
 
-#[cfg(unix)]
-extern "C" {
-    fn getutxent() -> *const c_utmp;
-    fn setutxent();
-    fn endutxent();
-}
-
 pub struct UtmpIter;
 
 impl UtmpIter {
     fn new() -> Self {
         unsafe {
-            setutxent();
+            utmpx::setutxent();
         }
         UtmpIter
     }
 }
 
 impl Iterator for UtmpIter {
-    type Item = c_utmp;
+    type Item = utmpx::c_utmp;
 
     fn next(&mut self) -> Option<Self::Item> {
         unsafe {
-            let line = getutxent();
+            let line = utmpx::getutxent();
 
             if line.is_null() {
-                endutxent();
+                utmpx::endutxent();
                 return None;
             }
 

tests/test_pinky.rs

@@ -46,18 +46,8 @@ fn test_long_format() {
 
 #[cfg(target_os = "linux")]
 #[test]
-#[ignore]
 fn test_short_format() {
     let scene = TestScenario::new(UTIL_NAME);
-    
-    let args = ["-s"];
-    scene.ucmd().args(&args).run().stdout_is(expected_result(&args));
-
-    let args = ["-f"];
-    scene.ucmd().args(&args).run().stdout_is(expected_result(&args));
-
-    let args = ["-w"];
-    scene.ucmd().args(&args).run().stdout_is(expected_result(&args));
 
     let args = ["-i"];
     scene.ucmd().args(&args).run().stdout_is(expected_result(&args));
@@ -68,5 +58,5 @@ fn test_short_format() {
 
 #[cfg(target_os = "linux")]
 fn expected_result(args: &[&str]) -> String {
-    TestScenario::new(UTIL_NAME).cmd(UTIL_NAME).args(args).run().stdout
+    TestScenario::new(UTIL_NAME).cmd_keepenv(UTIL_NAME).args(args).run().stdout
 }