TypeError: Unsupported fd type: TTY

[yukunyi]

tip:

net.js:50
throw new TypeError('Unsupported fd type: ' + type);
^
TypeError: Unsupported fd type: TTY

in pty.js:66:17

My System ArchLinux x86_64

nodejs version 0.10.1 or 0.10.0

[chjj]

This is really tough. Something really lowlevel must have been changed. I can't even implement my own Socket by using raw fs.read()s and fs.write()s. @TooTallNate, any idea what was changed here?

From what I can see:

$ git blame -L 50 lib/net.js
ca5022b8 lib/net.js    (Ben Noordhuis      2013-03-14 15:13:58 +0100   50)   throw new TypeError('Unsupported fd type: ' + type);
$ git show ca5022b8

nodejs/node-v0.x-archive@ca5022b

Not really what I expected.

[TooTallNate]

We might need to look into using the tty.ReadStream and tty.WriteStream
classes...

On Friday, March 22, 2013, Christopher Jeffrey wrote:

This is really tough. Something really lowlevel must have been changed. I
can't even implement my own Socket by using raw fs.read()s and fs.write()s.
@TooTallNate https://github.com/TooTallNate, any idea what was changed
here?

From what I can see:

$ git blame -L 50 lib/net.js
ca5022b8 lib/net.js (Ben Noordhuis 2013-03-14 15:13:58 +0100 50) throw new TypeError('Unsupported fd type: ' + type);
$ git show ca5022b8

Not really what I expected.

—
Reply to this email directly or view it on GitHubhttps://github.com//issues/32#issuecomment-15292377
.

[chjj]

After some testing, it appears pty.fork() is hanging for a while in node v0.10.x. Not sure what's going on.

[TooTallNate]

@chjj I'm playing around with the tty classes right now, seems promising. I'll try to have a refactor ASAP.

[TooTallNate]

So it looks like a patch as simple as this fixes things:

diff --git a/lib/pty.js b/lib/pty.js
index 046a05b..ed3380c 100644
--- a/lib/pty.js
+++ b/lib/pty.js
@@ -5,6 +5,7 @@
  */

 var net = require('net');
+var tty = require('tty');
 var pty = require('../build/Release/pty.node');

 /**
@@ -63,7 +64,7 @@ function Terminal(file, args, opt) {
     ? pty.fork(file, args, env, cwd, cols, rows, opt.uid, opt.gid)
     : pty.fork(file, args, env, cwd, cols, rows);

-  this.socket = new net.Socket(term.fd);
+  this.socket = new tty.ReadStream(term.fd);
   this.socket.setEncoding('utf8');
   this.socket.resume();

However, I don't totally feel like that's the correct fix. I'm beginning work on a more general purpose refactor in the node-v0.10-compat branch.

[chjj]

Doesn't fix anything for me. I've tried several different ways of reading from that fd. I must be doing something wrong. pty.fork hangs then no data is ever read on node v0.10.1.

[dylanvee]

@TooTallNate's quick-fix patch did work for me.

[TooTallNate]

@chjj fork() doesn't seem to be hanging for me. It takes the same amount of time as always. Did you recompile the module?

[chjj]

Several times. It builds successfully. I'm not sure what else to try other than to get my hands dirty with some debugging. I'll think I'll do an strace or something.

[chjj]

Nevermind. I'm a certified idiot today. Problem was completely on my end and the code only made it appear as though pty.fork was hanging. The fix works great.

[yukunyi]

TooTallNate's patch worked fine for me on ArchLinux .

[TooTallNate]

Wha?

On Sunday, March 24, 2013, yukunyi wrote:

@TooTallNate https://github.com/TooTallNate This patch on my work here.

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Reply to this email directly or view it on GitHubhttps://github.com//issues/32#issuecomment-15373792
.

[mwdhouse]

TooTallNate's patch worked fine for me on Mac OS X 10.8.3.

[TooTallNate]

I did a quick fix for this and tagged v0.2.2. @chjj You need to do an npm publish since I don't have publish rights on the npm package.

[rufusgor]

work on ubuntu 10.04 with node v0.10.1