2005-12-08 12:14:33 +00:00
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=head1 NAME
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upclient - Initializes the client portion of the Update Server
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=head1 SYNOPSIS
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2006-03-01 05:02:29 +00:00
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=for html
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<div class="synopsis">
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S<<< B<upclient> <I<hostname>> >>> [B<-crypt>] [B<-clear>] S<<< [B<-t> <I<retry time>>] >>>
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[B<-verbose>]* <I<dir>>+ [B<-help>]
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2006-03-01 05:02:29 +00:00
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=for html
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</div>
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=head1 DESCRIPTION
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2005-12-13 19:21:13 +00:00
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The upclient command initializes the client portion of the Update
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Server. In the conventional configuration, its binary file is located in
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the F</usr/afs/bin> directory on a file server machine.
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The upclient command is not normally issued at the command shell prompt
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but rather placed into a file server machine's F</usr/afs/local/BosConfig>
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file with the B<bos create> command. If it is ever issued at the command
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shell prompt, the issuer must be logged onto a database server machine as
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the local superuser C<root>.
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The upclient process periodically checks that all files in each local
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directory named by the I<dir> argument match the files in the
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corresponding directory on the source machine named by the I<hostname>
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argument. If a file does not match, the B<upclient> process requests the
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source copy from the B<upserver> process running on the source machine.
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By default, the B<upclient> process requests that the B<upserver> process
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encrypt the data before transferring it. Use the B<-clear> flag to
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request unencrypted transfer if appropriate. (The B<-crypt> flag
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explicitly sets the default.)
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In the conventional configuration, separate instances of the B<upclient>
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process request data from the F</usr/afs/bin> and F</usr/afs/etc>
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directories, except on machines for which the system control machine is
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also the binary distribution machine for the machine's system type. The
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conventional names for the separate instances are C<upclientbin> and
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C<upclientetc> respectively.
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The B<upclient> and B<upserver> processes always mutually authenticate,
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whether or not the data they pass is encrypted; they use the key with the
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highest key version number in the F</usr/afs/etc/KeyFile> file to
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construct a server ticket for mutual authentication.
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This command does not use the syntax conventions of the AFS command
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suites. Provide the command name and all option names in full.
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2005-12-09 14:48:56 +00:00
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=head1 CAUTIONS
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Do not use the Update Server to distribute the contents of the
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F</usr/afs/etc> directory using the B<-clear> option. The contents of
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this directory are sensitive.
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=head1 OPTIONS
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=over 4
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=item <I<hostname>>
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Names either the cell's system control machine (if the requested directory
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is F</usr/afs/etc>), or the binary distribution machine for the local
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machine's CPU and operating system type (if the requested directory is
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F</usr/afs/bin>).
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2005-12-13 19:21:13 +00:00
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=item B<-crypt>
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2005-12-13 19:21:13 +00:00
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Requests the transfer of data from the upserver process in encrypted
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form. This is the default; this flag just sets the default explicitly.
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Do not use this flag with the B<-clear> flag.
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=item B<-clear>
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Requests transfer of data from the B<upserver> process in unencrypted
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form. Provide this flag or the B<-crypt> flag, but not both.
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=item B<-t> <I<retry time>>
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Specifies how often to check for changes in each specified directory, as a
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number of seconds. If this argument is omitted, the default is C<300> (5
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minutes). This argument determines the maximum amount of time it takes for
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a change made on the source machine to propagate to this machine.
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=item B<-verbose>*
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Writes a trace of the upclient process's operations on the standard output
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stream, which usually corresponds to the machine console. Provide one,
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two, or three instances of the flag; each additional instance generates
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increasingly numerous and detailed messages.
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=item <I<dir>>+
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Names each directory to check for modified files. The conventional choices
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are the following:
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=over 4
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=item *
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F</usr/afs/bin>, in which case the recommended name for the process
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(assigned with the B<-instance> argument to the B<bos create> command) is
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C<upclientbin>. The I<hostname> is the binary distribution machine for the
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local machine's system type. You may wish to use the B<-clear> flag for
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the F</usr/afs/bin> directory, since binaries are not particularly
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sensitive and encrypting them takes system resources.
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=item *
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F</usr/afs/etc>, in which case the recommended name for the process
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(assigned with the B<-instance> argument to the B<bos create> command) is
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C<upclientetc>. The I<hostname> is the cell's system control machine. Use
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the B<-crypt> flag for the F</usr/afs/etc> directory, since it contains
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the F<KeyFile> file and other data vital to cell security.
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=back
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=item B<-help>
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2005-12-13 19:21:13 +00:00
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Prints the online help for this command. All other valid options are
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ignored.
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=back
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=head1 EXAMPLES
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2005-12-13 19:21:13 +00:00
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The following bos create command creates an C<upclientbin> process on the
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machine C<fs4.abc.com> that refers to the machine C<fs1.abc.com> as the
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source for the F</usr/afs/bin> directory (thus C<fs1.abc.com> is the
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binary distribution machine for machines of C<fs4.abc.com>'s type). The
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files in the F</usr/afs/bin> directory are distributed every 120 seconds.
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The command requests transfer in unencrypted form.
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2005-12-13 19:21:13 +00:00
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% bos create -server fs4.abc.com -instance upclientbin -type simple \
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-cmd "/usr/afs/bin/upclient fs1.abc.com -clear \
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-t 120 /usr/afs/bin"
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=head1 PRIVILEGE REQUIRED
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2005-12-13 19:21:13 +00:00
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The issuer must be logged in as the superuser C<root> on a file server
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machine to issue the command at a command shell prompt. It is conventional
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instead to create and start the process by issuing the B<bos create>
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command.
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=head1 SEE ALSO
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2005-12-13 19:21:13 +00:00
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L<BosConfig(5)>,
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L<bos_create(8)>,
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L<upserver(8)>
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=head1 COPYRIGHT
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IBM Corporation 2000. <http://www.ibm.com/> All Rights Reserved.
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This documentation is covered by the IBM Public License Version 1.0. It was
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converted from HTML to POD by software written by Chas Williams and Russ
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Allbery, based on work by Alf Wachsmann and Elizabeth Cassell.
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