Use "create_temp_file" to create a temporary file name for the perl script

client/mysqltest.c

@@ -2970,8 +2970,10 @@ void do_send_quit(struct st_command *command)
 void do_perl(struct st_command *command)
 {
   int error;
-  char buf[FN_REFLEN];
+  File fd;
   FILE *res_file;
+  char buf[FN_REFLEN];
+  char temp_file_path[FN_REFLEN];
   static DYNAMIC_STRING ds_script;
   static DYNAMIC_STRING ds_delimiter;
   const struct command_arg perl_args[] = {
@@ -2994,14 +2996,17 @@ void do_perl(struct st_command *command)
 
   DBUG_PRINT("info", ("Executing perl: %s", ds_script.str));
 
-  /* Format a name for a tmp .pl file that is unique for this process */
-  my_snprintf(buf, sizeof(buf), "%s/tmp/tmp_%d.pl",
-              getenv("MYSQLTEST_VARDIR"), getpid());
-  str_to_file(buf, ds_script.str, ds_script.length);
+  /* Create temporary file name */
+  if ((fd= create_temp_file(temp_file_path, getenv("MYSQLTEST_VARDIR"),
+                            "tmp", O_CREAT | O_SHARE | O_RDWR,
+                            MYF(MY_WME))) < 0)
+    die("Failed to create temporary file for perl command");
+  my_close(fd, MYF(0));
+
+  str_to_file(temp_file_path, ds_script.str, ds_script.length);
 
-  /* Format the perl <filename> command */
-  my_snprintf(buf, sizeof(buf), "perl %s/tmp/tmp_%d.pl",
-              getenv("MYSQLTEST_VARDIR"), getpid());
+  /* Format the "perl <filename>" command */
+  my_snprintf(buf, sizeof(buf), "perl %s", temp_file_path);
 
   if (!(res_file= popen(buf, "r")) && command->abort_on_error)
     die("popen(\"%s\", \"r\") failed", buf);
@@ -3019,6 +3024,10 @@ void do_perl(struct st_command *command)
     }
   }
   error= pclose(res_file);
+
+  /* Remove the temporary file */
+  my_delete(temp_file_path, MYF(0));
+
   handle_command_error(command, WEXITSTATUS(error));
   dynstr_free(&ds_script);
   dynstr_free(&ds_delimiter);