On Tue, Oct 16, 2012 at 05:32:57PM +0200, Sven Van Caekenberghe wrote:
>
> On 16 Oct 2012, at 16:13, David T. Lewis <[email protected]> wrote:
>
> > If you don't want to do it in the VM, you can do it with a shell script.
> > Just make a 512 byte file that starts with the shebang line that you
> > want to use, prepend it to the saved image file (with /bin/cat) and set
> > file mode executable (chmod).
>
> Well, I tried on my Ubuntu server, and I could't get it to work.
>
> I have a Pharo 2.0 image and a little test script called run.st
>
> $ cat run.st
> NonInteractiveTranscript stdout install.
> !
> | webSocket |
> webSocket := ZnWebSocket to: 'ws://localhost:8080/ws-echo'.
> [
> webSocket sendMessage: 'Pharo Smalltalk using Zinc WebSockets'.
> Transcript show: webSocket readMessage; cr ] ensure: [ webSocket close ].
> !
> Smalltalk quitPrimitive.
>
> I wrote another small Smalltalk script to generate the header (just to be
> sure)
>
> $ cat write-header.st
> 'header.bin' asFileReference writeStreamDo: [ :stream | | line |
> line := '#!!/home/ubuntu/smalltalk/bin/CogVM -vm-display-null
> -vm-sound-null -plugins /home/ubuntu/smalltalk/bin/'.
> stream
> binary; nextPutAll: line asByteArray; nextPut: 10;
> nextPutAll: (ByteArray new: 511 - line size) ].
> !
> Smalltalk quitPrimitive.
>
> Now I have a 512 byte header that looks like this
>
> $ hexdump -C header.bin
> 00000000 23 21 2f 68 6f 6d 65 2f 75 62 75 6e 74 75 2f 73 |#!/home/ubuntu/s|
> 00000010 6d 61 6c 6c 74 61 6c 6b 2f 62 69 6e 2f 43 6f 67 |malltalk/bin/Cog|
> 00000020 56 4d 20 2d 76 6d 2d 64 69 73 70 6c 61 79 2d 6e |VM -vm-display-n|
> 00000030 75 6c 6c 20 2d 76 6d 2d 73 6f 75 6e 64 2d 6e 75 |ull -vm-sound-nu|
> 00000040 6c 6c 20 2d 70 6c 75 67 69 6e 73 20 2f 68 6f 6d |ll -plugins /hom|
> 00000050 65 2f 75 62 75 6e 74 75 2f 73 6d 61 6c 6c 74 61 |e/ubuntu/smallta|
> 00000060 6c 6b 2f 62 69 6e 2f 0a 00 00 00 00 00 00 00 00 |lk/bin/.........|
> 00000070 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
> *
> 00000200
>
> Then I concatenate the header and the working image
>
> cat header.bin zinc.image > magic.image
>
> and I copy the changes and make the image executable.
>
> The image still works
>
> $ /home/ubuntu/smalltalk/bin/CogVM -vm-display-null -vm-sound-null -plugins
> /home/ubuntu/smalltalk/bin/ magic.image run.st
> Pharo Smalltalk using Zinc WebSockets
>
> But not when run directly
>
> $ ./magic.image
> Segmentation fault (core dumped)
>
> Any hints ?
>
The parameters are not being passed to your VM in the way you expect. Here is
what the man page for bash says:
If the program is a file beginning with #!, the remainder of the first
line specifies an interpreter for the program. The shell executes the
specified interpreter on operating systems that do not handle this exe-
cutable format themselves. The arguments to the interpreter consist of
a single optional argument following the interpreter name on the first
line of the program, followed by the name of the program, followed by
the command arguments, if any.
I think there is some trick you can use to pass parameters, but I can't
recall the details. Maybe google can help.
Dave
