Cast libc::spwd long int fields to i64

Author: ArniDagur

src/shadow.rs

@@ -83,19 +83,22 @@ pub struct Shadow {
 
 impl From<&libc::spwd> for Shadow {
     fn from(spwd: &libc::spwd) -> Shadow {
-        unsafe {
-            Shadow {
-                name: CStr::from_ptr((*spwd).sp_namp)
+        Shadow {
+            name: unsafe {
+                CStr::from_ptr(spwd.sp_namp)
                     .to_string_lossy()
-                    .into_owned(),
-                password: CString::new(CStr::from_ptr((*spwd).sp_pwdp).to_bytes()).unwrap(),
-                last_change: (*spwd).sp_lstchg,
-                min: (*spwd).sp_min,
-                max: (*spwd).sp_max,
-                warn: (*spwd).sp_warn,
-                inactive: (*spwd).sp_inact,
-                expire: (*spwd).sp_expire,
-            }
+                    .into_owned()
+            },
+            password: unsafe { CString::new(CStr::from_ptr(spwd.sp_pwdp).to_bytes()).unwrap() },
+            // These casts are necessary to convert the C `long int`
+            // integers (which can be either 32 or 64 bits, depending on
+            // the CPU architecture) into 64 bit integers.
+            last_change: spwd.sp_lstchg as i64,
+            min: spwd.sp_min as i64,
+            max: spwd.sp_max as i64,
+            warn: spwd.sp_warn as i64,
+            inactive: spwd.sp_inact as i64,
+            expire: spwd.sp_expire as i64,
         }
     }
 }