Detecting rubyw

ruby-talk
1

Is there any way (on Windows) to detect if a script is running under rubyw.exe, i.e. headless?

Thanks,

Nathaniel
Terralien, Inc.

<:((><

2

Do you get an exception if you try puts? If so you could catch that.

···

On Wed, 17 Nov 2004 12:02:12 +0900, Nathaniel Talbott <nathaniel@talbott.ws> wrote:

Is there any way (on Windows) to detect if a script is running under
rubyw.exe, i.e. headless?

Thanks,

Nathaniel
Terralien, Inc.

<:((><

3

Hi,

At Wed, 17 Nov 2004 12:02:12 +0900,
Nathaniel Talbott wrote in [ruby-talk:120600]:

Is there any way (on Windows) to detect if a script is running under
rubyw.exe, i.e. headless?

Can you open "CONIN$" and "CONOUT$" device files?

···

--
Nobu Nakada

4

Nope, no exception, and STDOUT.closed? returns false. Any other ideas?

Nathaniel
Terralien, Inc.

<:((><

···

On Nov 16, 2004, at 22:22, Lyndon Samson wrote:

Do you get an exception if you try puts? If so you could catch that.

5

I don't know... how would I do that? I don't think I've ever opened a device file on Windows.

Nathaniel
Terralien, Inc.

<:((><

···

On Nov 17, 2004, at 09:48, nobu.nokada@softhome.net wrote:

At Wed, 17 Nov 2004 12:02:12 +0900,
Nathaniel Talbott wrote in [ruby-talk:120600]:

Is there any way (on Windows) to detect if a script is running under
rubyw.exe, i.e. headless?

Can you open "CONIN$" and "CONOUT$" device files?

6

Hi,

At Wed, 17 Nov 2004 23:57:52 +0900,
Nathaniel Talbott wrote in [ruby-talk:120639]:

>> Is there any way (on Windows) to detect if a script is running under
>> rubyw.exe, i.e. headless?
>
> Can you open "CONIN$" and "CONOUT$" device files?

I don't know... how would I do that? I don't think I've ever opened a
device file on Windows.

Just open as well as ordinary files.

  begin
    open("CONIN$") {}
    open("CONOUT$", "w") {}
    have_console = true
  rescue SystemCallError
    have_console = false
  end

···

--
Nobu Nakada

7

Excellent! Works great. Thanks a ton, Nobu.

Nathaniel
Terralien, Inc.

<:((><

···

On Nov 17, 2004, at 10:39, nobu.nokada@softhome.net wrote:

Nathaniel Talbott wrote in [ruby-talk:120639]:

Is there any way (on Windows) to detect if a script is running under
rubyw.exe, i.e. headless?

Can you open "CONIN$" and "CONOUT$" device files?

I don't know... how would I do that? I don't think I've ever opened a
device file on Windows.

Just open as well as ordinary files.

  begin
    open("CONIN$") {}
    open("CONOUT$", "w") {}
    have_console = true
  rescue SystemCallError
    have_console = false
  end