Bi-directional pipe?


#1

Is there any standard Ruby way of creating a bidirectional pipe or
socketpair?

I want to pass a single IO-like object around, but to be able to both
read
and write from the other end. (What I’m actually trying to do is to put
a
facade around Net::SSH so that the command channel can be passed in as a
proxy to Net::Telnet, but I can think of other uses of this)

IO.popen(…, “w+”) does make such a bidirectional pipe, but as far as I
can
see only for communicating with a child process.

Any ideas?

Thanks,

Brian.


#2

On Mar 13, 2007, at 4:15 PM, Brian C. wrote:

IO.popen(…, “w+”) does make such a bidirectional pipe, but as far
as I can
see only for communicating with a child process.

Any ideas?

Thanks,

Brian.

rd, wr = IO.pipe

comes to mind.

-Rob

Rob B. http://agileconsultingllc.com
removed_email_address@domain.invalid


#3

On Wed, 14 Mar 2007, Rob B. wrote:

On Mar 13, 2007, at 4:15 PM, Brian C. wrote:

Is there any standard Ruby way of creating a bidirectional pipe or
socketpair?

require ‘socket’
Socket.pair …

-a


#4

On Wed, Mar 14, 2007 at 05:29:16AM +0900, Rob B. wrote:

proxy to Net::Telnet, but I can think of other uses of this)

rd, wr = IO.pipe

comes to mind.

That’s a unidirectional pipe. At least, all the rdoc stuff says that
one
end is a reader and the other end is a writer.


#5

On Wed, Mar 14, 2007 at 05:35:52AM +0900, removed_email_address@domain.invalid wrote:

On Wed, 14 Mar 2007, Rob B. wrote:

On Mar 13, 2007, at 4:15 PM, Brian C. wrote:

Is there any standard Ruby way of creating a bidirectional pipe or
socketpair?

require ‘socket’
Socket.pair …

irb(main):015:0> require ‘socket’
=> true
irb(main):016:0> a = Socket.pair
ArgumentError: wrong number of arguments (0 for 3)
from (irb):16:in `pair’
from (irb):16
from :0

OK, so it exists, it’s just not documented in ri - time to grep the
source I
guess. Thanks for the pointer.


#6

On Wed, 14 Mar 2007, Brian C. wrote:

irb(main):015:0> require ‘socket’
=> true
irb(main):016:0> a = Socket.pair
ArgumentError: wrong number of arguments (0 for 3)
from (irb):16:in `pair’
from (irb):16
from :0

OK, so it exists, it’s just not documented in ri - time to grep the source I
guess. Thanks for the pointer.

http://groups.google.com/group/comp.lang.ruby/browse_frm/thread/26d3538da0410b8b/fdc3c5c6686ceb49?lnk=gst&q=Socket.pair&rnum=2&hl=en#fdc3c5c6686ceb49

http://groups.google.com/group/comp.lang.ruby/browse_frm/thread/735d4f73074db10f/5a38eadb8db2d832?lnk=gst&q=Socket.pair&rnum=3&hl=en#5a38eadb8db2d832

regards.

-a