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Re: [Wlug] Making a pipe or socket look like a file.

by J. R. Mauro

On Jun 30, 2009, at 22:47, Alex Camilo <alex.camilo(a)gmail.com> wrote: > I'm thinking fuse might work. I'l look into working with fuse in It's dead simple, even in C. And then you can have a bunch of files for specific tasks > > python when I get to a real computer. Thanks! > > > > On Jun 30, 2009, at 10:35 PM, "J. R. Mauro" <jrm8005(a)gmail.com> wrote: > >> >> >> >> >> On Jun 30, 2009, at 22:24, Mike Frysinger <vapier(a)gentoo.org> wrote: >> >>> On Tuesday 30 June 2009 21:47:18 J. R. Mauro wrote: >>> >>> please dont top post >> >> Who did? >> >>> >>> >>>> On Jun 30, 2009, at 21:42, Alex Camilo <alex.camilo(a)gmail.com> >>>> wrote: >>>>> I'm trying to extend the functionality of a piece of CAD software >>>>> i'm using. The software package is called eagle and it has a >>>>> custom >>>>> in application scripting language that allows you to access an >>>>> open >>>>> CAD document by manipulating a tree of objects. The scripting >>>>> language is fairly limited when it comes to talking to the outside >>>>> world and only offers rudimentary file IO. I was wondering if any >>>>> of >>>>> you know how to make one end of a unix socket look like a file? >>>> >>>> Unfortunately, you can't. It's one of the design flaws of Unix. You >>>> might be able to wrap it with a FUSE filesystem. But sockets and >>>> FIFOs >>>> are unfortunately "special" >>> >>> i imagine you could use netcat to redirect from a named pipe so that >>> you can >> >> FIFOs are kind of a hack. Make a fuse filesystem in 20 lines of >> python >> and you get something more robust and specialized, plus network >> transparency for free >> >>> >>> read/write via the network ... seems to work for me >>> >>> $ mkfifo fifo >>> shell 1: $ nc -l -p 12345 localhost > fifo >>> shell 2: $ cat fifo >>> shell 3: $ nc localhost 12345 >>> -mike >> _______________________________________________ >> Wlug mailing list >> Wlug(a)mail.wlug.org >> http://mail.wlug.org/mailman/listinfo/wlug > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug

July 1, 2009

Re: [Wlug] Making a pipe or socket look like a file.

by Alex Camilo

I'm thinking fuse might work. I'l look into working with fuse in python when I get to a real computer. Thanks! On Jun 30, 2009, at 10:35 PM, "J. R. Mauro" <jrm8005(a)gmail.com> wrote: > > > > > On Jun 30, 2009, at 22:24, Mike Frysinger <vapier(a)gentoo.org> wrote: > >> On Tuesday 30 June 2009 21:47:18 J. R. Mauro wrote: >> >> please dont top post > > Who did? > >> >> >>> On Jun 30, 2009, at 21:42, Alex Camilo <alex.camilo(a)gmail.com> >>> wrote: >>>> I'm trying to extend the functionality of a piece of CAD software >>>> i'm using. The software package is called eagle and it has a custom >>>> in application scripting language that allows you to access an open >>>> CAD document by manipulating a tree of objects. The scripting >>>> language is fairly limited when it comes to talking to the outside >>>> world and only offers rudimentary file IO. I was wondering if any >>>> of >>>> you know how to make one end of a unix socket look like a file? >>> >>> Unfortunately, you can't. It's one of the design flaws of Unix. You >>> might be able to wrap it with a FUSE filesystem. But sockets and >>> FIFOs >>> are unfortunately "special" >> >> i imagine you could use netcat to redirect from a named pipe so that >> you can > > FIFOs are kind of a hack. Make a fuse filesystem in 20 lines of python > and you get something more robust and specialized, plus network > transparency for free > >> >> read/write via the network ... seems to work for me >> >> $ mkfifo fifo >> shell 1: $ nc -l -p 12345 localhost > fifo >> shell 2: $ cat fifo >> shell 3: $ nc localhost 12345 >> -mike > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug

July 1, 2009

Re: [Wlug] Making a pipe or socket look like a file.

by J. R. Mauro

On Jun 30, 2009, at 22:24, Mike Frysinger <vapier(a)gentoo.org> wrote: > On Tuesday 30 June 2009 21:47:18 J. R. Mauro wrote: > > please dont top post Who did? > > >> On Jun 30, 2009, at 21:42, Alex Camilo <alex.camilo(a)gmail.com> wrote: >>> I'm trying to extend the functionality of a piece of CAD software >>> i'm using. The software package is called eagle and it has a custom >>> in application scripting language that allows you to access an open >>> CAD document by manipulating a tree of objects. The scripting >>> language is fairly limited when it comes to talking to the outside >>> world and only offers rudimentary file IO. I was wondering if any of >>> you know how to make one end of a unix socket look like a file? >> >> Unfortunately, you can't. It's one of the design flaws of Unix. You >> might be able to wrap it with a FUSE filesystem. But sockets and >> FIFOs >> are unfortunately "special" > > i imagine you could use netcat to redirect from a named pipe so that > you can FIFOs are kind of a hack. Make a fuse filesystem in 20 lines of python and you get something more robust and specialized, plus network transparency for free > > read/write via the network ... seems to work for me > > $ mkfifo fifo > shell 1: $ nc -l -p 12345 localhost > fifo > shell 2: $ cat fifo > shell 3: $ nc localhost 12345 > -mike

July 1, 2009

Re: [Wlug] Making a pipe or socket look like a file.

by Mike Frysinger

On Tuesday 30 June 2009 21:47:18 J. R. Mauro wrote: please dont top post > On Jun 30, 2009, at 21:42, Alex Camilo <alex.camilo(a)gmail.com> wrote: > > I'm trying to extend the functionality of a piece of CAD software > > i'm using. The software package is called eagle and it has a custom > > in application scripting language that allows you to access an open > > CAD document by manipulating a tree of objects. The scripting > > language is fairly limited when it comes to talking to the outside > > world and only offers rudimentary file IO. I was wondering if any of > > you know how to make one end of a unix socket look like a file? > > Unfortunately, you can't. It's one of the design flaws of Unix. You > might be able to wrap it with a FUSE filesystem. But sockets and FIFOs > are unfortunately "special" i imagine you could use netcat to redirect from a named pipe so that you can read/write via the network ... seems to work for me $ mkfifo fifo shell 1: $ nc -l -p 12345 localhost > fifo shell 2: $ cat fifo shell 3: $ nc localhost 12345 -mike

July 1, 2009

Re: [Wlug] Making a pipe or socket look like a file.

by Scott Venier

J. R. Mauro wrote: > Unfortunately, you can't. It's one of the design flaws of Unix. You > might be able to wrap it with a FUSE filesystem. But sockets and FIFOs are > unfortunately "special" > FIFOs do exist in the filesystem (see mkfifo(3)), but they're only unidirectional. If you want bidirectional, either need a pair of FIFOs, or as a bit of a hack, you could have your external process open up a unix socket and write the fd number and it's PID into some pre-arranged file (say, /tmp/<username>/eagle/socket_location). Your script could then open that file, and use the information to construct a path to /proc/<PID>/fd/<fd> and access the socket as a file that way. Or, I suppose you could simplify the script side by making that pre-arranged file into a symlink to /proc/<PID>/fd/<fd>. Scott

July 1, 2009

Re: [Wlug] Making a pipe or socket look like a file.

by J. R. Mauro

Unfortunately, you can't. It's one of the design flaws of Unix. You might be able to wrap it with a FUSE filesystem. But sockets and FIFOs are unfortunately "special" On Jun 30, 2009, at 21:42, Alex Camilo <alex.camilo(a)gmail.com> wrote: > I'm trying to extend the functionality of a piece of CAD software > i'm using. The software package is called eagle and it has a custom > in application scripting language that allows you to access an open > CAD document by manipulating a tree of objects. The scripting > language is fairly limited when it comes to talking to the outside > world and only offers rudimentary file IO. I was wondering if any of > you know how to make one end of a unix socket look like a file? > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug

July 1, 2009

Making a pipe or socket look like a file.

by Alex Camilo

I'm trying to extend the functionality of a piece of CAD software i'm using. The software package is called eagle and it has a custom in application scripting language that allows you to access an open CAD document by manipulating a tree of objects. The scripting language is fairly limited when it comes to talking to the outside world and only offers rudimentary file IO. I was wondering if any of you know how to make one end of a unix socket look like a file?

July 1, 2009

OPENING - Linux kernel Engineer in north. MA - contract

by John Spencer

Our client in northern MA has a 6+ mth contract opening for a Software Engineer with strong Linux kernel skills. Must have solid C++, Linux Kernel, embedded skills and wireless experience is a big plus, if not then strong datacoms experience is required. Education/Experience: Bachelor's in CS/EE, masters preferred, 8 + years of experience developing software in an embedded RTOS environment. The candidate should posses following skills: - Good understanding of Linux kernel and Real Time OS environment. - Must possess strong debugging and analytical skills. - Expertise with system level programming. Experience with C/C++. - Good Team Player, Independent worker and should posses good Communication Skills. Regards, Optimal Engineering Partners Inc. is now Symphony Services! John Spencer Office: 978-256-1113 ext 7608 Fax: 978-256-1184 jspencer(a)symphonysv.com Symphony Services 1 Technology Park Drive Westford , MA 01886 www.symphonysv.com <blocked::file:///C:\Documents%20and%20Settings\hripley-boyd\Application %20Data\Microsoft\Signatures\www.symphonysv.com> This electronic transmission (and any attached documents) contains information from Symphony Services and is for the sole use of the individual or entity it is addressed to. If you receive this message in error, please notify me and destroy the attached message (and all attached documents) immediately.

June 22, 2009

Horrendous traffic - I may be late this evening...

by Andy Stewart

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 - -- Andy Stewart, Founder Worcester Linux Users' Group (http://www.wlug.org) Chelmsford Linux Meetup Group (http://linux.meetup.com/393) Amateur Radio: KB1OIQ -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (GNU/Linux) Comment: Using GnuPG with SUSE - http://enigmail.mozdev.org iD8DBQFKOrnIOjiraCaOTOoRAtBhAKDgdBCDnuikYdUeBgY1DuGhDjQreQCfSyx5 mg7AUMozIq0fxTNg5FQl5vk= =HU++ -----END PGP SIGNATURE-----

June 18, 2009

long shot (external usb cdrom?)

by Doug Mildram

In case you have an external USB cd-rom drive collecting dust, bring it tonite and I'll trade you something for it ! forgive the shamelessness. -doug

June 18, 2009