[Newbies] Using squeak with a script?

[Jacques Harmand]

I just installed the standard VM from squeak.org on another computer on
which I have admin privileges, and I get the exact same results (or rather
absence of results), so it's not related to the fact that I used a
non-completely-standard VM:
"OSProcess thisOSProcess stdOut nextPutAll: 'Hello world'. Smalltalk
snapshot: false andQuit: true." waits forever
"Transcript show: 'Hello world'; cr. Smalltalk snapshot: false andQuit:
true." terminates but does not print anything
"TranscriptStream redirectToStdOut: true. Transcript show: 'Hello world'.
Smalltalk snapshot: false andQuit: true." terminates but does not print
anything
"StandardFileStream stdout nextPutAll: 'Hello world'. Smalltalk snapshot:
false andQuit: true." waits forever
"ExternalCommandShell start. Transcript show: 'Hello world'.
ExternalCommandShell stop. Smalltalk snapshot: false andQuit: true." waits
forever
"StandardFileStream stdout nextPutAll: 'Hello world'; cr; flush. Smalltalk
snapshot: false andQuit: true." waits forever
"TranscriptStream redirectToStdOut: true. Transcript show: 'Hello world'.
Transcript endEntry. Smalltalk snapshot: false andQuit: true." terminates
but does not print anything


2017-02-23 8:57 GMT+01:00 Jacques Harmand <jacques.harmand at gmail.com>:

> Thank you also for your answer!
> Alas it doesn't work: the VM just waits forever (at least it does not
> execute the "Smalltalk snapshot: false andQuit: true." on the next line),
> and nothing is printed at all...
> And yes, I run Squeak in the foreground without a '&' at the end of the
> command line, with:
> /path/to/squeak <options> /path/to/Squeak.image $(readlink -f "$1")
> where <options> are "-headless" or "-vm-display-null -vm-sound-null".
>
> If that's important, the Squeak 5.0-201608171728 VM I use
> is cogspur64linux, compiled by myself, because the standard VM that can be
> downloaded on squeak.org aborts with:
> "pthread_setschedparam failed: Operation not permitted Read e.g.
> https://github.com/OpenSmalltalk/opensmalltalk-vm/releases/tag/r3732#linux
> "
> and I cannot do what is explained on that page because I'm not the admin
> of the computer.
>
> 2017-02-23 1:47 GMT+01:00 David T. Lewis <lewis at mail.msen.com>:
>
>> Hi Jacques,
>>
>> Output to the standard output stream may be buffered, and that may be part
>> of the problem. Try doing this and see if you get the expected output:
>>
>>   StandardFileStream stdout nextPutAll: 'Hello world'; cr; flush.
>>
>>
>> On Wed, Feb 22, 2017 at 05:09:21PM +0100, Jacques Harmand wrote:
>> > Thanks for your answers.
>> > Alas ExternalCommandShell does not seem to work, the VM seems to wait
>> > forever.
>>
>> Be sure that you are running Squeak in the foreground with no '&' at the
>> end of your command. If you start it in background with a '&' then the
>> stdin, stdout, and stderr streams will be disconnected from your console,
>> and both the image and the VM will appear to be stuck as the
>> ExternalCommandShell
>> tries to read from the disconnected input stream.
>>
>> I just tried ExternalCommandShell with the latest Squeak, and I see
>> that it probably needs a few more #flush to get the prompt to display
>> properly. I'll have to look into that :-)
>>
>> Dave
>>
>>
>> > I also tried various other ways:
>> > "OSProcess thisOSProcess stdOut nextPutAll: 'Hello world'."
>> > "FileStream stdout nextPutAll: 'Hello world'."
>> > "StandardFileStream stdout nextPutAll: 'Hello world'."
>> > "TranscriptStream redirectToStdOut: true. Transcript show: 'Hello
>> world'."
>> > ... but so far none of them seems to work.
>> > I also tried "-headless" and "-vm-display-null", but again this does not
>> > seem to help.
>> > Any pointer would be appreciated!
>> >
>> > 2017-02-22 15:49 GMT+01:00 H. Hirzel <hannes.hirzel at gmail.com>:
>> >
>> > > Maybe
>> > >
>> > >       ExternalCommandShell
>> > >
>> > >      http://wiki.squeak.org/squeak/6023
>> > >
>> > > this is of some help?
>> > >
>> > > --Hannes
>> > >
>> > > On 2/22/17, G??ran Krampe <goran at krampe.se> wrote:
>> > > > On 21/02/17 20:51, Jacques Harmand wrote:
>> > > >> Hi list,
>> > > >> I try to use squeak to execute the following basic Smalltalk
>> script (in
>> > > >> a file "hello.st <http://hello.st>")
>> > > >> "Transcript show: 'Hello world'; cr."
>> > > >> from the command line with Squeak.  This works as expected with
>> both GNU
>> > > >> Smalltalk and Pharo, but with Squeak nothing happens: Squeak seems
>> to
>> > > >> wait forever.  If I add
>> > > >> "Smalltalk snapshot: false andQuit: true."
>> > > >> after the above line, the execution of the script terminates, but
>> > > >> without printing anything.
>> > > >
>> > > > I haven't looked closely at latest Squeak (perhaps Pharo has coupled
>> > > > Transcript to stdout for headless mode?), but Transcript is not the
>> same
>> > > > thing as stdout - so you wouldn't see anything on stdout.
>> > > >
>> > > > regards, G??ran
>> > > > _______________________________________________
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