Hi, I don’t find the appropriate command to create a “pipe” file in
Ruby.
Which is the command to behave as system “mkfifo pipe_file”?
Thanks.
El Jueves, 7 de Enero de 2010, Iñaki Baz C. escribió:
Hi, I don’t find the appropriate command to create a “pipe” file in Ruby.
Which is the command to behave as system “mkfifo pipe_file”?
By the way, is it better to use a pipe_file or a UNIX socket? both are
IO
objects but, is there any advantage in using some of them?
Thanks.
On 01/07/2010 06:19 PM, Iñaki Baz C. wrote:
El Jueves, 7 de Enero de 2010, Iñaki Baz C. escribió:
Hi, I don’t find the appropriate command to create a “pipe” file in Ruby.
Which is the command to behave as system “mkfifo pipe_file”?By the way, is it better to use a pipe_file or a UNIX socket? both are IO
objects but, is there any advantage in using some of them?
It depends on your usage model: if you need to know every individual
client then you need to use a socket. If you just can read message
after message from wherever it came you can use a named pipe. Also,
IIRC a named pipe signals EOF once a writer has closed its end. So both
have a quite different usage model…
Kind regards
robert
El Jueves, 7 de Enero de 2010, Robert K.
escribió:> On 01/07/2010 06:19 PM, Iñaki Baz C. wrote:
El Jueves, 7 de Enero de 2010, Iñaki Baz C. escribió:
Hi, I don’t find the appropriate command to create a “pipe” file in
Ruby. Which is the command to behave as system “mkfifo pipe_file”?By the way, is it better to use a pipe_file or a UNIX socket? both are IO
objects but, is there any advantage in using some of them?It depends on your usage model: if you need to know every individual
client then you need to use a socket.
If you just can read message after message from wherever it came you can use
a named pipe.
Yes, this is my case 
On 7 Jan 2010, at 16:05, Iñaki Baz C. wrote:
Hi, I don’t find the appropriate command to create a “pipe” file in Ruby.
Which is the command to behave as system “mkfifo pipe_file”?
I see you’ve been asking a lot of questions over the Xmas break which
seem to amount to “how the heck do I tame Unix from Ruby”. Whilst
they’re by no means the full answer, take a look at the “Ruby Plumber’s
Guide” presentations linked from my sig and google the couple of videos
that accompany them (there’s one from GoRuCo, another from Rails
Underground, and possibly others too).
There should be enough between them to give you an idea of how to use
Unix system calls from standard Ruby with syscall and Ruby/DL (or with a
bit of thought from Ruby/FFI).
Also grab yourself a copy of Marc Rochkind’s “Advanced Unix Programming”
and then spend a few days with the man pages for your favourite Unix
distro. Whilst the POSIX calls have the advantage of being fairly
portable you’ll find most platforms have some cool calls of their own.
Ellie
Eleanor McHugh
Games With Brains
http://slides.games-with-brains.net
raise ArgumentError unless @reality.responds_to? :reason
El Viernes, 8 de Enero de 2010, Eleanor McHugh
escribió:>
There should be enough between them to give you an idea of how to use Unix
system calls from standard Ruby with syscall and Ruby/DL (or with a bit of
thought from Ruby/FFI).Also grab yourself a copy of Marc Rochkind’s “Advanced Unix Programming”
and then spend a few days with the man pages for your favourite Unix
distro. Whilst the POSIX calls have the advantage of being fairly portable
you’ll find most platforms have some cool calls of their own.
Thanks a lot, I’m already reading such documentation
On 8 Jan 2010, at 13:22, Iñaki Baz C. wrote:
Also grab yourself a copy of Marc Rochkind’s “Advanced Unix Programming”
and then spend a few days with the man pages for your favourite Unix
distro. Whilst the POSIX calls have the advantage of being fairly portable
you’ll find most platforms have some cool calls of their own.Thanks a lot, I’m already reading such documentation
I should add that there’s also a wealth of useful code lurking on Github
- especially amongst Ara T. Howard’s stuff.
Oh, and despite what the docs might say it seems to be perfectly safe
(at least under mainstream Unix implementations) to load libc with
either Ruby/DL or Ruby-FFI 
Ellie
Eleanor McHugh
Games With Brains
http://slides.games-with-brains.net
raise ArgumentError unless @reality.responds_to? :reason