Corinna Vinschen <corinna-cygwin <at> cygwin.com> writes: > On other systems sshd sets $PATH to "/usr/bin:/bin:/usr/sbin:/sbin", but > on Cygwin it doesn't change $PATH and just takes what it got from > cygrunsrv so as not to break the search path for DLLs not in the system > directories.
I'm running Cygwin since years with all traces of the Windows path deliberately deleted and never hit any problem. That would be different if I tried to mix windows applications in, but I prefer to have wrapper scripts for those anyway. > So this is kind of a cygrunsrv problem. It simply appends /bin to > $PATH, rather than prepending it. Ah, I was wondering where that comes from since nothing in sshd does it. So sshd just takes over the environment as set up by cygrunsrv? Then it might be a lot easier to just tell cygrunsrv what to put into PATH. > Right, /etc/default/login and, fwiw, any method to change $PATH from the > default path is disabled on Cygwin deliberately for the reason outlined > above. Thanks for confirming, after staring at the configure output for a while I've finally found that #ifdef in the source... > It's not that simple. It requires a code change in sshd. However, > maybe the rigorous handling is not required anymore these days. May not be necessary anyway. > Anyway, even if I re-enable /etc/default/login and the standard PATH > handling in sshd, there's no way to set an arbitrary environment. For > security reasons, sshd is very selective in the environment variables it > sets up. From /etc/default/login, it takes *only* PATH and UMASK, > for instance. Everything else should be set in the shell profiles. I really only need PATH at the moment. If I bounce commands directly onto the server without going through a login shell nothing really works as expected at the moment since Cygwin is last in path. I don't want to add Cygwin to the Windows path for other reasons and I really don't have control what else gets added there and in which order. > So, here's what I'll do: > > - Change cygrunsrv to prepend /bin to $PATH rather then appending it. I would appreciate if it could (optionally) look in some configuration file (/etc/environment ?) and use PATH as defined there and store the path as set up in Windows in ORIGINAL_PATH (like done in /etc/profile, where this is conditional on CYGWIN_NOWINPATH being present). > - Drop the Cygwin specific ignorance of /etc/default/login from the > source code and build a new OpenSSH package. > > Does that sound ok? Very much. If the environment can be controlled via cygrunsrv, then the changes to sshd might not be necessary. I've just tried using "-e PATH=/bin" in the sshd service startup, but PATH still seems to be hardcopied from Windows (the setting is ignored if the environment variable already exists?). Regards, Achim. -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
