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SUPSERVERS(8)               System Manager's Manual              SUPSERVERS(8)



NAME
       supfilesrv, supscan - sup server processes

SYNOPSIS
       supfilesrv [ -4 ] [ -6 ] [ -d ] [ -l ] [ -q ] [ -N ] [ -P ] [ -C
       MaxChildren ]
       supscan [ -v ] [ -s ] [ collection ] [ basedir ]

DESCRIPTION
       Supfilesrv is the server processes used to interact with sup client
       processes via the IP/TCP network protocol.  This server normally is
       expected to be running on server machines at all times.  Each machine
       with files of interest to users on other machines is expected to be a
       file server and should run supfilesrv.

       A file server machine will service requests for both "private" and
       "system" file collections.  No special action is necessary to support
       private collections, as the client user is expected to supply all
       necessary information.  For system collections, if the base directory
       is not the default (see FILES below), an entry must be put into the
       directory list file; this entry is a single text line containing the
       name of the collection, one or more spaces, and the name of the base
       directory for that collection.

       Each collection should have an entry in the host list file; this entry
       is a single text line containing the name of the collection, one or
       more spaces, and the name of the host machine acting as file server for
       that collection.

       Details of setting up a file collection for the file server are
       described in the manual entry for sup(1).

       Supfilesrv generally runs as a network server process that listens for
       connections, and for each connection (double-)forks a process to handle
       the interaction with the client.  However, with the -d flag, no forking
       will take place: the server will listen for a network connection,
       handle it, and exit.  This is useful for debugging the servers in
       "live" mode rather than as daemons.

       For debugging purposes, the -P "debugging ports" flag can be used.  It
       will cause the selection of an alternate, non-privileged set of TCP
       ports instead of the usual ports, which are reserved for the active
       server processes.  The -N "network debugging" flag can be used to
       produce voluminous messages describing the network communication
       progress and status. The more -N switches that you use the more output
       you get. Use 3 (separated by spaces: -N -N -N) to get a complete record
       of all network messages. Log messages are printed by syslog on
       daemon.log . To suppress log messages, the -q "quiet" flag can be used.

       supfilesrv uses libwrap style access control (the /etc/hosts.allow and
       /etc/hosts.deny files) with service name "supfilesrv". The -l "log"
       flag turn on loggin of accepted connections (denied connections are
       always logged).

       Normally the supfilesrv will only respond to 3 requests simultaneously,
       forking a child process for each client. If it gets additional requests
       it will respond with the error FSSETUPBUSY. The -C MaxChildren switch
       can be used to increase (or decrease) this number.

       supfilesrv listens to IPv4 listening socket by default.  With the -6
       flag, it will listen to IPv6 listening socket.  For dual stack support
       you will want to run two instances of supfilesrv.


SUPSCAN
       It is possible to pre-compile a list of the files in a collection to
       make supfilesrv service that collection much faster.  This can be done
       by running supscan on the desired collection on the repository machine.
       This produces a list of all the files in the collection at the time of
       the supscan; subsequent upgrades will be based on this list of files
       rather than actually scanning the disk at the time of the upgrade.  Of
       course, the upgrade will consequently bring the client machine up to
       the status of the repository machine as of the time of the supscan
       rather than as of the time of the upgrade; hence, if supscan is used,
       it should be run periodically on the collection.  This facility is
       useful for extremely large file collections that are upgraded many
       times per day, such as the CMU UNIX system software.  The "verbose"
       flag -v will cause supscan to produce output messages as it scans the
       files in the collection.  The "system" flag -s will cause supscan to
       scan all system collections residing on the current host.  The basedir
       parameter must be specified if the collection is a private collection
       whose base directory is not the default.

FILES
       /usr   default base directory for a collection

       /etc/supfiles/coll.dir
              base directory list for system collections

       /etc/supfiles/coll.host
              host name list for system collections

       <base-directory>/sup/<collection>/*
              files used by file server (see sup(1))

       <base-directory>/sup/<collection>/list
              list file used by supscan to create file list

       <base-directory>/sup/<collection>/scan
              file list created by supscan from list file

SEE ALSO
       sup(1) hosts_access(5) hosts_options(5)
       The SUP Software Upgrade Protocol, S.  A.  Shafer, CMU Computer Science
       Dept., 1985.

DIAGNOSTICS
       The file server places log messages on the standard and diagnostic
       output files.  The process name and process id number generally
       accompany each message for diagnostic purposes.

HISTORY
       31-July-92 Mary Thompson (mrt) at Carnegie Mellon University
              Removed references to supnameserver which has not existed for a
              long time. Update a few file names. Added -C switch.

       21-May-87  Glenn Marcy (gm0w) at Carnegie-Mellon University
              Updated documentation for 4.3; changed /usr/cmu to /usr/cs.

       15-Jan-86  Glenn Marcy (gm0w) at Carnegie-Mellon University
              Updated documentation; -s switch to supscan.

       23-May-85  Steven Shafer (sas) at Carnegie-Mellon University
              Supscan created and documented; also -N flag.

       04-Apr-85  Steven Shafer (sas) at Carnegie-Mellon University
              Created.



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