Tramp Issue in Emacs 24.4 Installed through Homebrew

Question

I recently installed Emacs 24.4 through homebrew through the command

brew install emacs --cocoa

I need to edit the files in a remote cluster with two step authentication. To do this I save the login credentials for the remote cluster through ControlMaster in ~/.ssh/config as

Host *
ForwardAgent yes
ControlMaster auto
ControlPath ~/.ssh/%r@%h:%p
ServerAliveCountMax=30
ServerAliveInterval=5

However when I try to edit the remote cluster files through tramp as

/ssh:username@remotecluster:~/filename

the emacs hangs with the message Waiting for prompts from remote shell which shows that tramp is NOT recognizing the ssh config information.

I provided the option

(setq tramp-verbose 500)

in ~/.emacs and I got the following message in the tramp debug buffer which gets repeated over & over.

Error Message:

    14:19:45.324180 tramp-file-name-handler (1) # Suppress received in operation (file-exists-p
    14:19:45.324396 tramp-get-file-property (8) #  file-truename nil
    14:19:45.324550 tramp-flush-directory-property (8) # 
    14:19:45.324713 tramp-get-connection-property (7) # process-name nil
    14:19:45.324897 tramp-flush-connection-property (7) # [ssh username remotecluster nil nil] nil
    14:19:45.325106 tramp-get-connection-property (7) # process-buffer nil
    14:19:45.325306 tramp-get-file-property (8) # / file-truename nil
    14:19:45.325462 tramp-flush-file-property (8) # /
    14:19:45.325863 tramp-get-connection-property (7) # ~ undef
    14:19:45.326046 tramp-get-connection-property (7) # process-name nil
    14:19:45.326224 tramp-get-connection-property (7) # process-name nil
    14:19:45.326376 tramp-get-connection-property (7) # process-buffer nil

Note: Following the same procedure, I do not face any issue using tramp in emacs 24 in Ubuntu 14.04.

Answer 1

For further analysis, one would need to investigate the whole debug buffer. Setting tramp-verbose to 500 looks impressive, a value of 10 would suffice already :-)

You could send me the debug buffer directly per email for analysis. Or use the Tramp mailing list.

Answer 2

"Waiting for prompts from remote shell"

There are other possibilities here. Your prompt may not match tramp-shell-prompt-pattern Can you post the values of tramp-shell-prompt-pattern and tramp-password-prompt-regexp . I recently added Passcode to mine to use two factor auth.

(setq tramp-password-prompt-regexp
 (concat
  "^.*"
  (regexp-opt
   '("Passphrase" "passphrase"
     "Password" "password"
     "Passcode" "passcode) t)
  ".*:\0? *"))

I'm also curious if you got the Control master to work.