[#70464] ljust, rjust... — "Chris Pine" <nemo@...>

Just thought I would run these ideas by everyone:

11 messages 2003/05/01

[#70502] temporary redirection of stdout — Andrew Walrond <andrew@...>

I'm new to ruby, so forgive any obvious stupididity, but can anyone

20 messages 2003/05/02

[#70535] SWIG on Solaris problem — Jim Freeze <jim@...>

Hi folks.

14 messages 2003/05/02

[#70594] Why is PHP so popular? What can we learn from the PHP camp? — ptkwt@...1.aracnet.com (Phil Tomson)

....and what can we learn from PHP's rapid rise to success?

99 messages 2003/05/05
[#70641] Re: Why is PHP so popular? What can we learn from the PHP camp? — Andreas Schwarz <usenet@...> 2003/05/05

Aredridel wrote:

[#70652] A wishlist for a "Ruby Standard Library" — Aredridel <aredridel@...> 2003/05/05

A wishlsit for a "Ruby Standard Library":

[#70655] Re: A wishlist for a "Ruby Standard Library" — Brian Candler <B.Candler@...> 2003/05/05

On Tue, May 06, 2003 at 07:39:54AM +0900, Aredridel wrote:

[#70673] Re: A wishlist for a "Ruby Standard Library" — Mark Wilson <mwilson13@...> 2003/05/06

[snipped many wonderful things.]

[#70759] Testing for a class existence — "Gennady" <gfb@...>

Does anybody know an easy way to test for a class/module existence in Ruby? What I do is adding a method to ObjectSpace for this, so that I can test it like:

15 messages 2003/05/06

[#70770] capture output — "Simon Strandgaard" <0bz63fz3m1qt3001@...>

I have seen much talking about this topic, but no working code!

68 messages 2003/05/06
[#70929] Re: IO.pipe + thread = hangs (was: Re: capture output) — "Robert Klemme" <bob.news@...> 2003/05/08

[#71741] Named Pipes — Mark Firestone <nedry@...> 2003/05/19

What is the recommended procedure for using named pipes in Ruby. Does one

[#71745] Re: Named Pipes — Brian Candler <B.Candler@...> 2003/05/19

On Mon, May 19, 2003 at 06:33:17PM +0900, Mark Firestone wrote:

[#70842] Symbiosis offer: trade Ruby for German :-) — Mauricio Fern疣dez <batsman.geo@...>

17 messages 2003/05/07

[#70865] access a variables name? — "meinrad.recheis" <my.name.here@...>

is it possible to access the variable-name of an object?

14 messages 2003/05/07

[#70891] Syck 0.25 + YAML.rb -- Objects in plain-text — why the lucky stiff <ruby-talk@...>

..my faithful friends..

20 messages 2003/05/07

[#70919] petition for raa-install to be included in 1.8 — ptkwt@...1.aracnet.com (Phil Tomson)

Similar to the YamlInRuby petition which has now closed.

14 messages 2003/05/08
[#70920] Re: petition for raa-install to be included in 1.8 — Sam Roberts <sroberts@...> 2003/05/08

I just looked again, and remember why I don't know anything about

[#70921] Re: petition for raa-install to be included in 1.8 — why the lucky stiff <ruby-talk@...> 2003/05/08

You can find a tutorial on using raa-install (as well as its API) at:

[#70985] Can a global be a constant? — Jim Freeze <jim@...>

Hi

36 messages 2003/05/08
[#71001] Re: Can a global be a constant? — "Hal E. Fulton" <hal9000@...> 2003/05/08

----- Original Message -----

[#71003] Re: Can a global be a constant? — Jim Freeze <jim@...> 2003/05/08

On Friday, 9 May 2003 at 8:23:52 +0900, Hal E. Fulton wrote:

[#71007] Re: Can a global be a constant? — dblack@... 2003/05/08

Hi --

[#71036] Re: Regexp: why does (re)* return only last repetition? — "Robert Klemme" <bob.news@...>

21 messages 2003/05/09
[#71209] Re: Regexp: why does (re)* return only last repetition? — "Robert Klemme" <bob.news@...> 2003/05/12

[#71225] Re: Regexp: why does (re)* return only last repetition? — Austin Ziegler <austin@...> 2003/05/12

On Mon, 12 May 2003 17:39:19 +0900, Robert Klemme wrote:

[#71229] Re: Regexp: why does (re)* return only last repetition? — Brian Candler <B.Candler@...> 2003/05/12

On Mon, May 12, 2003 at 10:18:00PM +0900, Austin Ziegler wrote:

[#71266] Re: Regexp: why does (re)* return only last repetition? — Austin Ziegler <austin@...> 2003/05/12

On Mon, 12 May 2003 23:51:44 +0900, Brian Candler wrote:

[#71042] TCP Sockets — Dominik Werder <dwerder@...>

Hi there,

28 messages 2003/05/09
[#71089] Re: TCP Sockets — Tom Felker <tcfelker@...> 2003/05/09

On Fri, 2003-05-09 at 05:40, Dominik Werder wrote:

[#71543] Re: TCP Sockets — Dominik Werder <dwerder@...> 2003/05/16

>> How can I tell how many bytes can be read from an IO object without

[#71547] Re: TCP Sockets — Brian Candler <B.Candler@...> 2003/05/16

On Fri, May 16, 2003 at 05:14:17PM +0900, Dominik Werder wrote:

[#71550] Re: TCP Sockets — Dominik Werder <dwerder@...> 2003/05/16

my problem is not the http protocol itself (not at this time :) but the IO-

[#71551] Re: TCP Sockets — Brian Candler <B.Candler@...> 2003/05/16

On Fri, May 16, 2003 at 07:20:30PM +0900, Dominik Werder wrote:

[#71553] Re: TCP Sockets — Dominik Werder <dwerder@...> 2003/05/16

> Maybe, but threads are really the "ruby way" to solve this problem.

[#71557] Re: TCP Sockets — Brian Candler <B.Candler@...> 2003/05/16

On Fri, May 16, 2003 at 07:53:39PM +0900, Dominik Werder wrote:

[#71562] Re: TCP Sockets — Dominik Werder <dwerder@...> 2003/05/16

> That would mean mixing the binary streams in a non-deterministic way,

[#71107] RCR for child execution — Brian Candler <B.Candler@...>

Looking on RubyGarden it seems that the RCR process there is "resting", so

99 messages 2003/05/10
[#71122] Re: RCR for child execution — "Simon Strandgaard" <0bz63fz3m1qt3001@...> 2003/05/10

On Sun, 11 May 2003 01:50:49 +0900, Brian Candler wrote:

[#71126] Re: RCR for child execution — Brian Candler <B.Candler@...> 2003/05/10

On Sun, May 11, 2003 at 01:27:31AM +0900, Simon Strandgaard wrote:

[#71364] Re: RCR for child execution — "Simon Strandgaard" <0bz63fz3m1qt3001@...> 2003/05/13

On Tue, 13 May 2003 21:11:08 +0000, ahoward wrote:

[#71385] Re: RCR for child execution — matz@... (Yukihiro Matsumoto) 2003/05/14

Hi,

[#71152] Is Rubygarden's wiki restricted to English? — Mauricio Fern疣dez <batsman.geo@...>

20 messages 2003/05/11
[#71160] Re: Is Rubygarden's wiki restricted to English? — "Hal E. Fulton" <hal9000@...> 2003/05/11

----- Original Message -----

[#71165] Re: Is Rubygarden's wiki restricted to English? — Mauricio Fern疣dez <batsman.geo@...> 2003/05/11

On Mon, May 12, 2003 at 12:40:26AM +0900, Hal E. Fulton wrote:

[#71189] efficiency advice needed — "meinrad.recheis" <my.name.here@...>

hi,

12 messages 2003/05/11

[#71297] State Pattern Implementation — "Robert Klemme" <bob.news@...>

22 messages 2003/05/13

[#71361] Objects VS Datastructures — Simon Vandemoortele <deliriousREMOVEUPPERCASETEXTTOREPLY@...>

19 messages 2003/05/13

[#71447] Embedding/GC/heap corruption problem — "Jan Bernhardt" <j.bernhardt@...>

Hi,

22 messages 2003/05/14

[#71488] Test::Unit sequencing — Brian Candler <B.Candler@...>

A question for more experienced Test::Unit users.

23 messages 2003/05/15
[#71492] Re: Test::Unit sequencing — Anders Bengtsson <ndrsbngtssn@...> 2003/05/15

--- Brian Candler <B.Candler@pobox.com> wrote:

[#71508] Re: Test::Unit sequencing — ahoward <ahoward@...> 2003/05/15

On Thu, 15 May 2003, [iso-8859-1] Anders Bengtsson wrote:

[#71510] RCR: $INCLUDED global var — martindemello@... (Martin DeMello)

$INCLUDED = (__FILE__ != $0)

25 messages 2003/05/15
[#71515] Re: RCR: $INCLUDED global var — matz@... (Yukihiro Matsumoto) 2003/05/15

Hi,

[#71525] Re: RCR: $INCLUDED global var — ahoward <ahoward@...> 2003/05/15

On Fri, 16 May 2003, Yukihiro Matsumoto wrote:

[#71520] public/protected/private syntax — Guillaume Marcais <guslist@...>

I tend to find the public/protected/private keywords in Ruby a little odd.

27 messages 2003/05/15
[#71540] Re: public/protected/private syntax — "Robert Klemme" <bob.news@...> 2003/05/16

[#71573] Re: public/protected/private syntax — Guillaume Marcais <guillaume.marcais@...> 2003/05/16

On Friday 16 May 2003 03:38 am, you wrote:

[#71595] Re: public/protected/private syntax — Austin Ziegler <austin@...> 2003/05/16

On Fri, 16 May 2003 23:33:21 +0900, Guillaume Marcais wrote:

[#71560] gzip cgi compression — Dominik Werder <dwerder@...>

Is zlib compatible with HTTP-gzip-output-compression?

14 messages 2003/05/16

[#71636] select strange behavier — "Simon Strandgaard" <0bz63fz3m1qt3001@...>

'select' is suppose to watch some file-descriptors and when an event

22 messages 2003/05/17

[#71673] An Object Going Out Of Scope — "vinita Papur" <gkapur@...>

A quick question. How can one discern when an object goes out of scope?

46 messages 2003/05/18
[#71678] Re: An Object Going Out Of Scope — "MikkelFJ" <mikkelfj-anti-spam@...> 2003/05/18

[#71680] Re: An Object Going Out Of Scope — Mauricio Fern疣dez <batsman.geo@...> 2003/05/18

On Sun, May 18, 2003 at 06:08:43PM +0900, MikkelFJ wrote:

[#71681] ruby garbage collection — "Gaffer" <gaffer@...> 2003/05/18

i need this for a realtime game application which has embedded ruby -- after

[#71683] Re: ruby garbage collection — Mauricio Fern疣dez <batsman.geo@...> 2003/05/18

On Sun, May 18, 2003 at 08:35:11PM +0900, Gaffer wrote:

[#71685] Re: ruby garbage collection — "Gaffer" <gaffer@...> 2003/05/18

strange, i found the rb_gc call on my own and called that to good effect

[#71688] Re: ruby garbage collection — "Simon Strandgaard" <0bz63fz3m1qt3001@...> 2003/05/18

On Sun, 18 May 2003 22:10:18 +0900, Gaffer wrote:

[#71689] Re: ruby garbage collection — "Gaffer" <gaffer@...> 2003/05/18

i think its actually the GC cleaning up matrix and vector classes (my own

[#71691] Re: ruby garbage collection — "Simon Strandgaard" <0bz63fz3m1qt3001@...> 2003/05/18

On Sun, 18 May 2003 22:39:17 +0900, Gaffer wrote:

[#71692] Re: ruby garbage collection — "Gaffer" <gaffer@...> 2003/05/18

i'm pretty sure i've tracked down the cause, this is my first time embedding

[#71695] Re: ruby garbage collection — "Simon Strandgaard" <0bz63fz3m1qt3001@...> 2003/05/18

On Sun, 18 May 2003 23:48:28 +0900, Gaffer wrote:

[#71948] How I'd like method-wrapping to work... — "Hal E. Fulton" <hal9000@...>

OK, I read Matz's blog entries as well as I could.

16 messages 2003/05/21

[#72030] why is "does" missing from this sub!-stitution? — Dave Oshel <dcoshel@...>

[~/Desktop] dave$ cat foobar.rb ; foobar.rb

19 messages 2003/05/22
[#72037] Re: why is "does" missing from this sub!-stitution? — Dave Oshel <dcoshel@...> 2003/05/22

In article <20030522202818.GA24497@student.ei.uni-stuttgart.de>,

[#72056] Naive CGI question — "Hal E. Fulton" <hal9000@...>

I'm betting this is either impossible

15 messages 2003/05/23

[#72134] Problem compiling extension on Solaris — "Tim Hunter" <cyclists@...>

I have an user who is trying to build RMagick on Solaris with Ruby 1.6.8.

22 messages 2003/05/25
[#72262] Re: Problem compiling extension on Solaris — Daniel Berger <djberge@...> 2003/05/27

[#72150] Binary Tree vs. Hash — Xiangrong Fang <xrfang@...>

Hi ruby fans,

47 messages 2003/05/26

[#72184] Project Directory Structure — Jim Freeze <jim@...>

Hi:

47 messages 2003/05/26
[#72218] Re: Project Directory Structure — "MikkelFJ" <mikkelfj-anti-spam@...> 2003/05/26

[#72222] Re: Project Directory Structure — Jim Freeze <jim@...> 2003/05/26

Thanks everyone for your input so far.

[#72244] Re: Project Directory Structure — Robert Feldt <feldt@...> 2003/05/27

On Tue, 27 May 2003, Jim Freeze wrote:

[#72260] Re: Project Directory Structure — Jim Freeze <jim@...> 2003/05/27

On Tuesday, 27 May 2003 at 18:26:53 +0900, Robert Feldt wrote:

[#72265] Re: Project Directory Structure — Jim Freeze <jim@...> 2003/05/27

Thanks for all the input. A description of the Project

[#72269] Re: Project Directory Structure — Robert Feldt <feldt@...> 2003/05/27

On Wed, 28 May 2003, Jim Freeze wrote:

[#72274] RCR: unpack/pack Bignum — Robert Feldt <feldt@...>

I'm sure this has been discussed before and maybe there are good reasons

27 messages 2003/05/27
[#72375] Re: RCR: unpack/pack Bignum — Robert Feldt <feldt@...> 2003/05/28

No one seems to be interested in this issue so I'll have to reply to

[#72381] Re: RCR: unpack/pack Bignum — nobu.nokada@... 2003/05/28

Hi,

[#72394] Re: RCR: unpack/pack Bignum — Robert Feldt <feldt@...> 2003/05/29

On Thu, 29 May 2003 nobu.nokada@softhome.net wrote:

[#72403] Re: RCR: unpack/pack Bignum — nobu.nokada@... 2003/05/29

Hi,

[#72600] What is BER compression? (was RCR: unpack/pack Bignum) — Sam Roberts <sroberts@...> 2003/05/31

Is it documented anywhere, what this 'w' template is useful for?

[#72371] Windows Installer for Ruby 1.8.0 (CVS) — Andrew Hunt <andy@...>

Hi all,

16 messages 2003/05/28

[#72388] Array.extend versus instance.extend — "Simon Strandgaard" <0bz63fz3m1qt3001@...>

I want to install 'shift_until_kind_of' in the global Array class

18 messages 2003/05/29

[#72420] Metakit for Ruby - Would you want it? — bobx@... (Bob)

I have a gentleman in England who I have been talking with who is

23 messages 2003/05/29

[#72439] Iteration - last detection — "Orion Hunter" <orion2480@...>

Is there any built in functionality for iteration that will allow me to

41 messages 2003/05/29
[#72510] Re: Iteration - last detection — Carlos <angus@...> 2003/05/30

> Is there any built in functionality for iteration that will allow me to

[#72577] IF statement in ruby 1.8.0 (2003-05-26) [i386-mswin32] — "Shashank Date" <sdate@...>

Just when I thought that I had perfectly understood the IF statement in

14 messages 2003/05/31

Re: RCR for child execution

From: Brian Candler <B.Candler@...>
Date: 2003-05-13 07:32:09 UTC
List: ruby-talk #71298
On Tue, May 13, 2003 at 09:48:53AM +0900, Simon Strandgaard wrote:
> I want users of the editor to be able to use thier own favorite ruby
> snippets within the editor... *unmodified* ...they don't have to do popen
> or Open3 or other ackward things for executing their favorite scripts.
> All Ruby output should go to a text-buffer.

You mean like irb?

Maybe you should have a look at the source for FreeRIDE and see how it
handles this. I haven't installed it, but it sounds like exactly the sort of
integrated environment you're talking about, so they must have dealt with
the problem you have encountered.

> > In the general
> > case, this is simply not possible whilst the Sandbox is in the same process
> > as you, because it shares fd0/1/2 with the the main program (because both
> > Ruby and C *are* part of the same program), and therefore the program has a
> > way to write to fd0/1/2.
> 
> Not agree.. I think this *is* possible. 
> Everytime Ruby spawns a child it should do like this:
> 
> void system(command) {
>     pid=fork();
>     if(pid != 0) {
>          stdout = rb_stdout;  /* what im asking for */
>          stderr = rb_stderr;  /* what im asking for */
>          stdin = rb_stdin;    /* what im asking for */
>          execv(command);
>     }
> }

What you have written cannot work:
1. stdout is a malloc'd FILE* object in the parent's memory space, which is
   destroyed immediately on exec. You need to modify the file descriptor
   table using dup2() instead
2. rb_stdout is a VALUE and stdout is a FILE* anyway. Two different things.
3. the file descriptor table holds Unix file descriptors. It cannot point
   to a Ruby object. If rb_stdout were a StringIO object, you could not
   possibly insert it into the FD table. You would have to put three pipes
   into the FD table instead, and the parent would talk down them. Or else
   a temporary file.

But anyway, I wrote "in the general case", not "in the specific case of
system() and backtick"

In the general case, your Ruby program could do lots of things which force
a direct output to stdout/stderr. Here is one small valid Ruby program:

        pid = fork do
          exec("ls /nonexistent")
        end
        Process.waitpid(pid)

How are you going to modify Ruby so that the output of those four lines are
captured in the sandbox?

Another example would be

        require 'ext/someobj'
        a = Someobj.new.dosomething

where ext/someobj is a C extension which writes directly to stdout. If your
editor environment is going to be general-purpose then it better handle that
case too.

Modifying certain Ruby commands like 'system' is not the solution to the
general problem.

> OK.. again assignment to stdout is illegal. freopen should be used instead.
> Admitted.. I havn't yet tried reopen'ing stdout/stderr :-)

freopen only lets you associate the FD with a file.

It would certainly be possible to do
        STDOUT.reopen("/tmp/capture.out")

before calling the snippet you are interested in. Then you can close it and
read the file.

This sounds like it might be a good solution for your particular problem
domain (i.e. an environment for running Ruby interactively). Of course you
lose the STDOUT/STDERR given to the main program when it started, so it had
better be a graphical environment.

But that solution is specific to your problem. I don't think it warrants a
modification to Ruby, the general-purpose programming language, itself.

Cheers,

Brian.

In This Thread