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CLOG(1)                                                                CLOG(1)

NAME
       clog - Authenticate to the Coda distributed file system

SYNOPSIS
       clog [ -pipe ] [ -test ] [ -host hostname ] [ -coda | -kerberos4 |
       -kerberos5 ] [ -tofile file ] [ -fromfile file ] [username][@realm]

DESCRIPTION
       This command enables users to get tokens to use for authenticated
       communication with a Coda File System.  The given name and a password
       or kerberos token are passed to an Authentication Server. The
       Authentication Server returns a set of tokens encoding the chosen
       identity if the password is correct.  clog passes these tokens to the
       venus process, which acts as the users agent for file manipulation.
       These tokens have a limited lifetime, becoming invalid after 25 hours.
       If an attempt is made to operate on a Coda File System object while the
       user is not authenticated, the user will assume the privileges of the
       Anonymous user.

       clog accepts the following arguments:

       -pipe  For use in shell scripts, the password is read from stdin.  This
              option is also enabled when stdin is not a tty.

       -test  Test the clog-venus token passing code.

       -host  Specify the host where the authentication server is running.

       -coda | -kerberos4 | -kerberos5
              Authentication mechanism, use kerberos tickets or coda password
              to identify yourself to the authentication server.

       -tofile
              After obtaining a token from the authentication server, write it
              to a file.

       -fromfile
              Instead of connecting to the authentication server, read a
              previously saved token from a file and pass it to venus.

       [username][@realm]
              Coda user name you wish to be identified as within the specified
              realm. If the username is not specified, clog tries to use the
              local login name. If the Coda realm name is not specified clog
              falls back to using the default realm name as specified in the
              venus.conf configuration file.

BUGS
       o The on-disk tokens are not encrypted.

       o The -pipe option should be dropped, there already is an isatty(stdin)
         test which is sufficient for most cases.

       o The -test option should also test the reading and writing code of
         token files.

SEE ALSO
       cunlog(1), venus(8)

AUTHORS
       o 1987, Adapted from AFS-2

       o Maria R. Ebling, 1990, Created man page

Coda Distributed File System     25 April 2005                         CLOG(1)