backupfs

SuSE 10.0 and openSuSE 10.2 (at least) has next sshd precompiled PATH
assumption (reported usually in the beginning of /etc/ssh/sshd_config):

PATH=/usr/bin:/bin:/usr/sbin:/sbin

When running backupfs the first time in remote client-server mode that
paths were searched for program execution, not /usr/local/bin, where all
backupfs stuff resides. So, ssh backupfs@susehost backupfs-chksrc returns
code 255.

My first proposition is to add remark about the problem to INSTALL file of
the distribution or inform the user in some other way.

To reveal the problem I added "env" to the list of allowed commands in
backupfs-shell. To my mind it's reasonable to debug potential problems and
the security should not suffer greatly. So, it's my second proposition.

I can help with both things if you agree.