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Squeak headless on a Raspberry Pi

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Louis LaBrunda

Squeak headless on a Raspberry Pi

Hi All,

I'm running squeak headless on a Raspberry Pi with -vm-display-null. Normally there is no
monitor connected. Sometimes for testing I can connect a monitor. How can/should I write some
text to the monitor so I can see what is going on? Thanks in advance for any and all help.

Lou
--
Louis LaBrunda
Keystone Software Corp.
SkypeMe callto://PhotonDemon

timrowledge

Re: Squeak headless on a Raspberry Pi

> On 10-08-2017, at 9:05 AM, Louis LaBrunda <[hidden email]> wrote:
>
> Hi All,
>
> I'm running squeak headless on a Raspberry Pi with -vm-display-null. Normally there is no
> monitor connected. Sometimes for testing I can connect a monitor. How can/should I write some
> text to the monitor so I can see what is going on? Thanks in advance for any and all help.

Other than doing magic to open a display window etc - which ought to be possible but I’ve never looked at it - the simplest thing is to use the stdio stream. As in

FileStream stdio nextPutAll: ‘Hello, World’; flush.

Your words of deathless prose should appear in whatever place stdout would appear, typically the terminal window from which you fired up Squeak. I have to admit I have no idea where that might be if you started Squeak from some login or startup script. Maybe it would require some added > mylogfile magic?

tim
--
tim Rowledge; [hidden email]; http://www.rowledge.org/tim
It is easier to change the specification to fit the program than vice versa.

David T. Lewis

Re: Squeak headless on a Raspberry Pi

And don't forget to put a #cr or #lf (I forget which) before the #flush.

I usually have OSProcess loaded, in which case a handy logging trick is
OSProcess class>>trace:

Dave

>
>> On 10-08-2017, at 9:05 AM, Louis LaBrunda <[hidden email]>
>> wrote:
>>
>> Hi All,
>>
>> I'm running squeak headless on a Raspberry Pi with -vm-display-null.
>> Normally there is no
>> monitor connected. Sometimes for testing I can connect a monitor. How
>> can/should I write some
>> text to the monitor so I can see what is going on? Thanks in advance
>> for any and all help.
>
> Other than doing magic to open a display window etc - which ought to be
> possible but Iâve never looked at it - the simplest thing is to use the
> stdio stream. As in
>
> FileStream stdio nextPutAll: âHello, Worldâ; flush.
>
> Your words of deathless prose should appear in whatever place stdout would
> appear, typically the terminal window from which you fired up Squeak. I
> have to admit I have no idea where that might be if you started Squeak
> from some login or startup script. Maybe it would require some added >
> mylogfile magic?
>
> tim
> --
> tim Rowledge; [hidden email]; http://www.rowledge.org/tim
> It is easier to change the specification to fit the program than vice
> versa.
>
>
>
>

Eliot Miranda-2

Re: Squeak headless on a Raspberry Pi

In reply to this post by timrowledge

On Thu, Aug 10, 2017 at 9:41 AM, tim Rowledge <[hidden email]> wrote:

> On 10-08-2017, at 9:05 AM, Louis LaBrunda <[hidden email]> wrote:
>
> Hi All,
>
> I'm running squeak headless on a Raspberry Pi with -vm-display-null. Normally there is no
> monitor connected. Sometimes for testing I can connect a monitor. How can/should I write some
> text to the monitor so I can see what is going on? Thanks in advance for any and all help.

Other than doing magic to open a display window etc - which ought to be possible but I’ve never looked at it - the simplest thing is to use the stdio stream. As in

FileStream stdio nextPutAll: ‘Hello, World’; flush.

That should be

FileStream stdout nextPutAll: ‘Hello, World’; cr; flush.

FileStream stderr nextPutAll: ‘Hello, World’; cr; flush.

Your words of deathless prose should appear in whatever place stdout would appear, typically the terminal window from which you fired up Squeak. I have to admit I have no idea where that might be if you started Squeak from some login or startup script. Maybe it would require some added > mylogfile magic?

tim
--
tim Rowledge; [hidden email]; http://www.rowledge.org/tim
It is easier to change the specification to fit the program than vice versa.

_,,,^..^,,,_

best, Eliot

Bert Freudenberg

Re: Squeak headless on a Raspberry Pi

In reply to this post by Louis LaBrunda

A common technique for servers is to have an RFB server running in the image, and to connect to it using a VNC client when needed. That way you don't even need a monitor, just a network connection.

- Bert -

On Thu, Aug 10, 2017 at 6:05 PM, Louis LaBrunda <[hidden email]> wrote:

Hi All,

I'm running squeak headless on a Raspberry Pi with -vm-display-null. Normally there is no
monitor connected. Sometimes for testing I can connect a monitor. How can/should I write some
text to the monitor so I can see what is going on? Thanks in advance for any and all help.

Lou
--
Louis LaBrunda
Keystone Software Corp.
SkypeMe callto://PhotonDemon

Louis LaBrunda

Squeak headless on a Raspberry Pi

Hi Guys,

Thanks for all the suggestions. I ended up with creating a simple/small log file. It was the
easiest thing to do and it helped solve my most recent problem.

Lou
--
Louis LaBrunda
Keystone Software Corp.
SkypeMe callto://PhotonDemon