tramp: Windows setup hints
4.19 Issues with Cygwin ssh
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This section is incomplete. Please share your solutions.
Cygwin’s ‘ssh’ works only with a Cygwin version of Emacs. To check
for compatibility: type ‘M-x eshell’, and start ‘ssh test.host’.
Incompatibilities trigger this message:
Pseudo-terminal will not be allocated because stdin is not a terminal.
Some older versions of Cygwin’s ‘ssh’ work with the ‘sshx’ access
method. Consult Cygwin’s FAQ at <http://cygwin.com/faq/> for details.
When using the ‘scpx’ access method, Emacs may call ‘scp’ with
Windows file naming, such as ‘c:/foo’. But the version of ‘scp’ that is
installed with Cygwin does not know about Windows file naming, which
causes it to incorrectly look for a host named ‘c’.
A workaround: write a wrapper script for ‘scp’ to convert Windows
file names to Cygwin file names.
When using the ‘ssh-agent’ on Windows for password-less interaction,
‘ssh’ methods depend on the environment variable ‘SSH_AUTH_SOCK’. But
this variable is not set when Emacs is started from a Desktop shortcut
and authentication fails.
One workaround is to use a Windows based SSH Agent, such as Pageant.
It is part of the Putty Suite of tools.
The fallback is to start Emacs from a shell.
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