A single batch script can be defined to work on all Windows and Linux machines. If Perl is available on all potential execute machines, then depend on it, and write a Perl batch script. Name the script with the extension =.pl=, and Windows machines will use this extension to identify and run it as a Perl script. The first line of the Perl script will have =#!=, letting Linux machines know what to do.
{subsection: TJ's shabang hack}
+
+Three parts to this set up make it work:
+
+*: Create a small Windows console application that returns 0. Name this application =#!.exe=
+{linebreak}{linebreak}
+Here is C++ source, assuming it is named =success.cpp=, that can be compiled to produce =#!.exe=:
+{code}
+// Force the linker to include KERNEL32.LIB
+#pragma comment(linker, "/defaultlib:kernel32.lib")
+extern "C" void __stdcall ExitProcess(unsigned int uExitCode);
+extern "C" void __cdecl begin( void ) { ExitProcess(0); }
+{endcode}
+{linebreak}
+This code could be compiled with the Microsoft C++ compiler like this
+{verbatim}
+ cl success.cpp /link /subsystem:console /entry:begin kernel32.lib
+{endverbatim}
+
+*: Send file =#!.exe= along with the job.
+Assuming that this file is in the current working directory at
+submission, the submit description file will contain
+{code}
+ should_transfer_files = IF_NEEDED
+ transfer_input_files = #!.exe
+{endcode}
+
+*: The following batch script, named with a =.bat= extension,
+becomes the executable:
+{code}
+#!/bin/bash
+#!&& @goto windows_part
+
+echo 'Linux'
+ls -l
+
+exit 0
+:windows_part
+@echo off
+
+@echo Windows
+dir
+
+{endcode}
+{linebreak}
+On Linux, this works as a normal bash script; the =exit 0= stops the script before it gets to the label =windows_part=.
+What Windows sees is a =.bat= file, so it runs in the command shell.
+The first line is =#!/bin/bash=,
+and Windows interprets that line as: _run the program_ =#!.exe= _and pass it_ =/bin/bash= _as arguments._
+The second line is =#!&& @goto windows_part=,
+which Windows interprets as: _run the program_ =#!=, _and if it succeeds,
+goto the_ =windows_part= _label in this script._
+
+So, you have one script, that contains both Linux and Windows commands.
+It works on Windows as long as you have the program named =#!.exe= in the current directory (or in the path) that returns success.
