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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  com‐
       munication  with	 a Coda File System.  The given name and a password or
       kerberos token are passed to an Authentication Server. The  Authentica‐
       tion 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  pre‐
	      viously 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
       · The on-disk tokens are not encrypted.

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

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

SEE ALSO
       cunlog(1), venus(8)

AUTHORS
       · 1987, Adapted from AFS-2

       · Maria R. Ebling, 1990, Created man page

Coda Distributed File System	 25 April 2005			       CLOG(1)

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