Opened 14 years ago
Last modified 2 years ago
#29794 assigned defect
emacs-app @23.3_0 Problem using tramp in emacs.app: "ControlPath too long"
Reported by: | gorzarg@… | Owned by: | drkp (Dan Ports) |
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Priority: | Normal | Milestone: | |
Component: | ports | Version: | 1.9.2 |
Keywords: | Cc: | humem (humem), cooljeanius (Eric Gallager) | |
Port: | emacs-app |
Description
OS: 10.6.7 Xcode: Version 3.2.6 (1761)
Using tramp in emacs.app results in the error "ControlPath too long" after typing in the remote machine's password.
For example, in emacs:
1) "C-x C-f" to find a file
2) Type "/user@remotemachine:somefile.txt"
3) Asks for password, (type the correct one in).
4) Results in this error:
user@remotemachine's password: ControlPath too long
Process *tramp/scpc remotemachine* exited abnormally with code 255
In the *Messages* buffer, it says the tramp is doing the command:
Tramp: Sending command `exec ssh -o ControlPath=/var/folders/...a_really_long_dir_name.../-Tmp-/tramp.442LsW.%r@%h:%p -o ControlMaster=yes -e none remotemachine'
So I think the ControlPath is just too long for ssh.
Note: I don't think this is a problem with tramp itself, because I compared the tramp files in /Applications/MacPorts/Emacs.app/Contents/Resources/lisp/net/ with the ones on a linux machine where tramp works, and they're pretty much the same.
Any suggestions or fixes?
Change History (17)
comment:1 Changed 14 years ago by gorzarg@…
Cc: | gorzarg@… added |
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comment:2 Changed 14 years ago by jmroot (Joshua Root)
Cc: | gorzarg@… removed |
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Owner: | changed from macports-tickets@… to css@… |
Please remember to cc the maintainer. You do not need to be in cc when you are the reporter.
comment:3 Changed 14 years ago by dmercer@…
Replying to gorzarg@…:
Any suggestions or fixes?
I saw this today (MacOS 10.6.7 + Aquamacs 23.3.1). I don't have a permanent fix, but this workaround works for me. Tramp is using the TMPDIR environment to build a path for the ssh control socket. On my system, TMPDIR is set to something that looks like:
/var/folders/Ww/WwhMzsgCFW0-C433VCMqNE+++TI/-Tmp-/
which results in a path ssh thinks is too long. You can force Aquamacs to use a standard TMPDIR by starting it from the terminal like so:
$ TMPDIR=/tmp open /Applications/Aquamacs.app
comment:4 follow-up: 5 Changed 13 years ago by cssdev
So is this an issue with the port or a more general platform configuration issue?
comment:5 follow-up: 13 Changed 13 years ago by gorzarg@…
Replying to css@…:
So is this an issue with the port or a more general platform configuration issue?
Not sure. However, dmercer's workaround works. So, I dug around in the tramp files, and I think I have a fix:
1) Open up /Applications/MacPorts/Emacs.app/Contents/Resources/lisp/net/tramp-compat.el.gz in emacs with root access (e.g. sudo emacs tramp-compat.el.gz). 2) In tramp-compat.el.gz, delete lines 212-224. 3) Add the following text: (file-name-as-directory "/tmp"))
to line 212.
4) Control-x-s to save the file. 5) Meta-x, byte-compile-file, then enter in tramp-compat.el.gz and press enter. 6) Meta-x, byte-compile-file, then enter in tramp.el.gz and press enter. 7) Adjust permissions of byte-compiled files so other people can use them: sudo chmod go+r tramp.elc tramp-compat.elc.
Tramp should work now without having to set the $TMPDIR env variable. Basically, I'm just modifying the tramp-compat-temporary-file-directory function in tramp-compat.el.gz to just set the temporary directory as "/tmp."
Maybe for the next release of this port, this change (or something similar) could be incorporated so I don't have to manually do this every time I update Emacs.app?
comment:6 follow-up: 7 Changed 13 years ago by yaroslavvb@…
I got same error and gorzag's solution seems to work.
The only snag was with the the byte compilation part using official Emacs for MacOS build (23.3.1 (x86_64-apple-darwin, NS apple-appkit-1038.35)) -- tramp.el gives error on (require 'tramp-compat) -- "Cannot open load file: tramp-compat". I got around this by deleting tramp.elc and tramp-compat.elc, unzipping tramp and tramp-compat, and doing gorzarg's modification in tramp-compat.el.
comment:7 Changed 13 years ago by gorzarg@…
You used the default Mac OS emacs (i.e. /usr/bin/emacs)? I used emacs.app (from MacPorts) to do the byte-compilations, and it worked okay. I also have (auto-compression-mode t) in my .emacs file to edit compressed files on the fly (you can also do M-x auto-compression-mode).
Hope that helps any other users with problems with tramp.
Replying to yaroslavvb@…:
I got same error and gorzag's solution seems to work.
The only snag was with the the byte compilation part using official Emacs for MacOS build (23.3.1 (x86_64-apple-darwin, NS apple-appkit-1038.35)) -- tramp.el gives error on (require 'tramp-compat) -- "Cannot open load file: tramp-compat". I got around this by deleting tramp.elc and tramp-compat.elc, unzipping tramp and tramp-compat, and doing gorzarg's modification in tramp-compat.el.
comment:8 Changed 13 years ago by yaroslavvb@…
I think perhaps the error in byte-compilation was due to archiving. Once I unarchived tramp-compat.el.gz, I can byte-compile it
comment:9 Changed 13 years ago by jmroot (Joshua Root)
Cc: | hum@… added |
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comment:10 Changed 12 years ago by humem (humem)
Resolution: | → worksforme |
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Status: | new → closed |
I do not get the same error with the latest emacs-app @24.1. I am closing this ticket, but please reopen it if you find any trouble.
comment:11 follow-up: 12 Changed 12 years ago by buckmeisterq@…
Resolution: | worksforme |
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Status: | closed → reopened |
I've got GNU Emacs 24.2.1 (x86_64-apple-darwin, NS apple-appkit-1038.36) of 2012-08-27 on bob.porkrind.org and it still has the issue. I've tried both workarounds of setting TMPDIR=/tmp and modifying/byte-compiling the tramp-compat.el.gz, but I still get:
CentOS release 5.8 (Final)
Kernel 2.6.18-194.32.1.el5 on an x86_64
ControlPath too long (followed by a hat-M, like a CTRL-M from windows line ending?)
Any way that I can provide more details to help diagnose/reproduce/workaround this problem? I would really like to use tramp on the mac but it is unusable due to this error. I'm trying to do things like open "~/bin/file_name.sh" on a host named "aa-master". It seems like the control path for that would be really, really short.
My username is only six chars, and this is my obfuscated but character-count-equivalent ssh config (note that I've tried with and without ControlPath being set):
Host aa-master
HostName aa-hudson-master-vm.ottffssente.com
User ottffs
IdentitiesOnly yes
IdentityFile ~/.ssh/id_rsa
ControlPath /c/c-%r
comment:12 Changed 12 years ago by cabo@…
Replying to buckmeisterq@…:
HostName aa-hudson-master-vm.ottffssente.com
From someone who also lives in la-la-la-can-i-make-my-domain-name-longer-land:
Workaround: use the IP address.
(I know, I know.)
comment:13 Changed 11 years ago by espenhw@…
Replying to gorzarg@…:
Replying to css@…:
So is this an issue with the port or a more general platform configuration issue?
Not sure. However, dmercer's workaround works. So, I dug around in the tramp files, and I think I have a fix:
1) Open up /Applications/MacPorts/Emacs.app/Contents/Resources/lisp/net/tramp-compat.el.gz in emacs with root access (e.g. sudo emacs tramp-compat.el.gz). 2) In tramp-compat.el.gz, delete lines 212-224. 3) Add the following text: (file-name-as-directory "/tmp"))
to line 212.
4) Control-x-s to save the file. 5) Meta-x, byte-compile-file, then enter in tramp-compat.el.gz and press enter. 6) Meta-x, byte-compile-file, then enter in tramp.el.gz and press enter. 7) Adjust permissions of byte-compiled files so other people can use them: sudo chmod go+r tramp.elc tramp-compat.elc.
Or better, add the following to your .emacs:
(put 'temporary-file-directory 'standard-value '((file-name-as-directory "/tmp")))
comment:14 Changed 10 years ago by sergey+macports@…
I haven't experiences this problem until OS X 10.10 Yosemite and Emacs 24.4. The original workaround recipe didn't work and I wasn't kin on modifying Tramp source. The following worked for me right before starting Tramp: M-x setenv TMPDIR /tmp
. I only use it btw to sync up Org mode files using MobileOrg.
comment:15 Changed 9 years ago by kurthindenburg (Kurt Hindenburg)
Owner: | changed from css@… to macports-tickets@… |
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Status: | reopened → new |
comment:16 Changed 7 years ago by jmroot (Joshua Root)
Owner: | changed from macports-tickets@… to drkp |
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Status: | new → assigned |
comment:17 Changed 2 years ago by cooljeanius (Eric Gallager)
Cc: | cooljeanius added |
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Cc Me!