use api rather than cmd to retrieve active user name to solve

non-English problem

build.rs

@@ -1,7 +1,7 @@
 #[cfg(windows)]
 fn build_windows() {
     cc::Build::new().file("src/windows.cc").compile("windows");
-    // println!("cargo:rustc-link-lib=WtsApi32");
+    println!("cargo:rustc-link-lib=WtsApi32");
     println!("cargo:rerun-if-changed=build.rs");
     println!("cargo:rerun-if-changed=windows.cc");
 }

src/platform/windows.rs

@@ -633,6 +633,26 @@ fn get_error() -> String {
     }
 }
 
+pub fn get_active_username() -> String {
+    let name = crate::username();
+    if name != "SYSTEM" {
+        return name;
+    }
+    extern "C" {
+        fn get_active_user(path: *mut u16, n: u32) -> u32;
+    }
+    let buff_size = 256;
+    let mut buff: Vec<u16> = Vec::with_capacity(buff_size);
+    buff.resize(buff_size, 0);
+    let n = unsafe { get_active_user(buff.as_mut_ptr(), buff_size as _) };
+    if n == 0 {
+        return "".to_owned();
+    }
+    let sl = unsafe { std::slice::from_raw_parts(buff.as_ptr(), n as _) };
+    String::from_utf16(sl).unwrap_or("??".to_owned()).trim_end_matches('\0').to_owned()
+}
+
+/*
 pub fn get_active_username() -> String {
     use std::os::windows::process::CommandExt;
     let name = crate::username();
@@ -654,6 +674,7 @@ pub fn get_active_username() -> String {
     }
     return "".to_owned();
 }
+*/
 
 pub fn is_prelogin() -> bool {
     let username = get_active_username();

src/windows.cc

@@ -363,4 +363,21 @@ extern "C"
     {
         SHAddToRecentDocs(SHARD_PATHW, path);
     }
-} // end of extern "C"
+
+    uint32_t get_active_user(PWSTR bufin, uint32_t nin)    
+    {    
+        uint32_t nout = 0;    
+        auto id = WTSGetActiveConsoleSessionId();    
+        PWSTR buf = NULL;    
+        DWORD n = 0;    
+        if (WTSQuerySessionInformationW(NULL, id, WTSUserName, &buf, &n))    
+        {    
+            if (buf) {    
+                nout = min(nin, n);    
+                memcpy(bufin, buf, nout);    
+                WTSFreeMemory(buf);    
+            }    
+        }    
+        return nout;    
+    }  
+} // end of extern "C"