[scponly] scp blues (read this first for this thread)

[wby oblyr]

Hi Daniel, 

I'm glad to hear you sorted this out. 

I'll make a note to add some code that check the existence/permissions of /etc/password in the chroot as a 
sanity check for these troublesome installations.  

The other checks (2 and 3) vary significantly on each OS, and the complexity of runtime sanity checks probably 
outweigh the complexity of the chroot installations themselves.  Still, I'm glad you reported all this as it may 
serve to help someone else.

joe

Daniel Webb wrote this message on Thu, Feb 23, 2006 at 00:33 -0700:
> <blush>
> 
> Permissions problem.  My umask changed somewhere along the line.
> /etc/passwd in the chroot dir didn't have world-readable.
> 
> It would be nice if scp had just *said* that (like "permission denied reading
> /etc/passwd") instead of "unknown user"...
> 
> Anyhow, if you are a reader finding this post through a search engine, here
> are the most common reasons for "unknown user" with scp:
> 
> 1. Missing, invalid, or permission denied /etc/passwd
> 2. Missing /lib/libnss<something>
> 3. Missing /etc/nsswitch.conf (doesn't apply in most cases)
> 
> Also, make sure you find all libraries you need by using ldd on every binary
> in your chroot.
> 
> 
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