diff --git a/lib/xy.h b/lib/xy.h
index 6ee0238..4d3eaad 100644
--- a/lib/xy.h
+++ b/lib/xy.h
@@ -491,19 +491,6 @@ xy_streql_ic(const char *str1, const char *str2)
 }
 
 
-static char *
-xy_str_to_quietcmd (const char *cmd)
-{
-  char *ret = NULL;
-#ifdef _WIN32
-  ret = xy_2strcat (cmd, " >nul 2>nul ");
-#else
-  ret = xy_2strcat (cmd, " 1>/dev/null 2>&1 ");
-#endif
-  return ret;
-}
-
-
 /**
  * @flavor Ruby: String#end_with?
  */
@@ -776,9 +763,23 @@ _xy_log_brkt (int level, const char *prompt1, const char *prompt2, const char *c
 
 
 /******************************************************
- *                      System
+ *                      cross OS
  ******************************************************/
 
+static char *
+xy_quiet_cmd (const char *cmd)
+{
+  char *ret = NULL;
+
+  if (xy.on_windows)
+    ret = xy_2strcat (cmd, " >nul 2>nul ");
+  else
+    ret = xy_2strcat (cmd, " 1>/dev/null 2>&1 ");
+
+  return ret;
+}
+
+
 /**
  * @brief 执行 `cmd`，返回某行输出结果，并对已经遍历过的行执行 `func`
  *
@@ -845,7 +846,7 @@ xy_run (const char *cmd, unsigned long n)
 int
 xy_run_get_status (char *cmd)
 {
-  char * command = xy_str_to_quietcmd (cmd);
+  char * command = xy_quiet_cmd (cmd);
 
   int status = system (command);
   return status;
@@ -896,10 +897,6 @@ xy_run_get_stdout (const char *cmd, char **output)
 }
 
 
-/******************************************************
- *                      cross OS
- ******************************************************/
-
  /**
  * @flavor 该函数同 just 中的 os_family()，只区分 windows, unix
  *
diff --git a/src/chsrc-main.c b/src/chsrc-main.c
index 65dba5c..a8cad71 100644
--- a/src/chsrc-main.c
+++ b/src/chsrc-main.c
@@ -443,7 +443,7 @@ cli_print_issues ()
   /*
   if (chsrc_check_program ("gh"))
     {
-      char *cmd = xy_str_to_quietcmd ("gh browse --repo RubyMetric/chsrc");
+      char *cmd = xy_quiet_cmd ("gh browse --repo RubyMetric/chsrc");
       system (cmd);
     }
   */
diff --git a/src/framework/core.c b/src/framework/core.c
index 2d4ec22..364b1e6 100644
--- a/src/framework/core.c
+++ b/src/framework/core.c
@@ -383,7 +383,7 @@ cmd_to_check_program (char *prog_name)
 {
   char *check_tool = xy.on_windows ?  "where " : "command -v ";
 
-  char *quiet_cmd = xy_str_to_quietcmd (xy_2strcat (check_tool, prog_name));
+  char *quiet_cmd = xy_quiet_cmd (xy_2strcat (check_tool, prog_name));
 
   return quiet_cmd;
 }
@@ -402,7 +402,7 @@ XY_Deprecate_This("Use cmd_to_check_program() instead")
 static char *
 cmd_to_check_program2 (char *prog_name)
 {
-  char *quiet_cmd = xy_str_to_quietcmd (xy_2strcat (prog_name, " --version"));
+  char *quiet_cmd = xy_quiet_cmd (xy_2strcat (prog_name, " --version"));
   return quiet_cmd;
 }
 
@@ -1595,7 +1595,7 @@ chsrc_ensure_dir (const char *dir)
       mkdir_cmd = "mkdir -p ";
     }
   char *cmd = xy_2strcat (mkdir_cmd, dir);
-  cmd = xy_str_to_quietcmd (cmd);
+  cmd = xy_quiet_cmd (cmd);
 
   chsrc_run_as_a_service (cmd);
 
diff --git a/src/recipe/lang/Go.c b/src/recipe/lang/Go.c
index d3a2559..92990ec 100644
--- a/src/recipe/lang/Go.c
+++ b/src/recipe/lang/Go.c
@@ -53,7 +53,7 @@ pl_go_prelude ()
 void
 pl_go_check_cmd ()
 {
-  char *check_cmd = xy_str_to_quietcmd ("go version");
+  char *check_cmd = xy_quiet_cmd ("go version");
   bool exist = query_program_exist (check_cmd, "go", Noisy_When_Exist|Noisy_When_NonExist);
 
   if (!exist)
diff --git a/src/recipe/lang/JavaScript/Yarn.c b/src/recipe/lang/JavaScript/Yarn.c
index a80515f..dd29bb9 100644
--- a/src/recipe/lang/JavaScript/Yarn.c
+++ b/src/recipe/lang/JavaScript/Yarn.c
@@ -78,7 +78,7 @@ pl_js_yarn_setsrc (char *option)
           // 不能直接退出，因为 Leader target 不能就此结束
           return;
         }
-      // 不再阻止换源命令输出到终端，即不再调用 xy_str_to_quietcmd()
+      // 不再阻止换源命令输出到终端，即不再调用 xy_quiet_cmd()
       cmd = xy_2strcat ("yarn config set registry ", source.url);
       chsrc_run (cmd, RunOpt_No_Last_New_Line);
     }
diff --git a/src/recipe/os/BSD/FreeBSD.c b/src/recipe/os/BSD/FreeBSD.c
index 35a7c8c..05a30e7 100644
--- a/src/recipe/os/BSD/FreeBSD.c
+++ b/src/recipe/os/BSD/FreeBSD.c
@@ -75,7 +75,7 @@ os_freebsd_setsrc (char *option)
   // @ccmywish: 2023-09-27 据 @ykla , NJU的freebsd-ports源没有设置 Git，
   //                       但是我认为由于使用Git还是要比非Git方便许多，我们尽可能坚持使用Git
   //                       而 gitup 又要额外修改它自己的配置，比较麻烦
-  bool git_exist = query_program_exist (xy_str_to_quietcmd ("git version"), "git", Noisy_When_Exist|Noisy_When_NonExist);
+  bool git_exist = query_program_exist (xy_quiet_cmd ("git version"), "git", Noisy_When_Exist|Noisy_When_NonExist);
   if (git_exist)
     {
       if (xy_streql("nju",source.mirror->code))