Description:

"scponly" is an alternative "shell" (of sorts) for system administrators
who would like to provide access to remote users to both read and write
local files without providing any remote execution privileges. Functionally,
it is best described as a wrapper to the tried-and-true ssh suite.

scponly validates remote requests by examining the third argument passed
to the shell upon login (the first argument is the shell itself, and the second
is "-c"). The only commands allowed are "scp", "sftp-server" and "ls".
Arguments to these commands are passed along unmolested.

Some features are:
- compatibility with sftp, WinSCP 2.0/3.0, gftp, rsync, Unison, Subversion.
- chroot: scponly can chroot to the user's home directory
(or any other directory the user has permissions for),
disallowing access to the rest of the filesystem.
- logging: scponly logs time, client IP address, username,
and the actual request to syslog.