UUCICO(8C)                                                          UUCICO(8C)


NAME
       uucico, uucpd - transfer files queued by uucp or uux

SYNOPSIS
       /usr/lib/uucp/uucico  [  -dspooldir  ]  [ -ggrade ] [ -rrole ] [ -R ] [
       -ssystem ] [ -xdebug ] [ -L ] [ -tturnaround ]

       /etc/uucpd

DESCRIPTION
       Uucico performs the actual work involved in transferring files  between
       systems.   Uucp(1C) and uux(1C) merely queue requests for data transfer
       which uucico processes.

       The following options are available.

       -dspooldir
               Use  spooldir  as  the  spool   directory.   The   default   is
               /usr/spool/uucp.

       -ggrade Only  send  jobs  of  grade grade or higher this transfer.  The
               grade of a job is specified when the job is queued by  uucp  or
               uux.

       -rrole  role  is either 1 or 0; it indicates whether uucico is to start
               up in master or slave role, respectively. 1 is used  when  run‐
               ning  uucico  by  hand or from cron(8).  0 is used when another
               system calls the local system.  Slave role is the default.

       -R      Reverse roles.  When used with the -r1 option, this  tells  the
               remote system to begin sending its jobs first, instead of wait‐
               ing for the local machine to finish.

       -ssystem
               Call only system system.  If -s is not specified,  and  -r1  is
               specified,  uucico  will  attempt to call all systems for which
               there is work.  If -s is specified, a call will be made even if
               there is no work for that system. This is useful for polling.

       -xdebug Turn on debugging at level debug.  Level 5 is a good start when
               trying to find out why a call failed. Level 9 is very detailed.
               Level 99 is absurdly verbose.  If role is 1 (master), output is
               normally written to the standard  message  output  stderr.   If
               stderr     is     unavailable,    output    is    written    to
               /usr/spool/uucp/AUDIT/system.  When role is 0  (slave),  debug‐
               ging output is always written to the AUDIT file.

       -L      Only  call  ‘‘local’’  sites. A site is considered local if the
               device-type field in L.sys is one of LOCAL, DIR or TCP.

       -tturnaround
               Use turnaround as the line turnaround time (in minutes) instead
               of  the  default  30.   If  turnaround  is  missing  or 0, line
               turnaround will be disabled.  After uucico has been running  in
               slave  role  for  turnaround minutes, it will attempt to run in
               master role by negotiating with the remote machine.  In earlier
               versions  of  uucico,  a  transfer  of  many large files in one
               direction would hold up mail  going  in  the  other  direction.
               With the turnaround code working, the message flow will be more
               bidirectional in the short term.  This option only  works  with
               newer uucico’s and is ignored by older ones.

       If uucico receives a SIGFPE (see kill(1)), it will toggle the debugging
       on or off.

       Uucpd is the server for  supporting  uucp  connections  over  networks.
       Uucpd  listens  for  service  requests  at  the  port  indicated in the
       ‘‘uucp’’ service specification; see services(5).  The  server  provides
       login  name  and  password authentication before starting up uucico for
       the rest of the transaction.

       Uucico is commonly used either of two ways: as a  daemon  run  periodi‐
       cally  by cron(8) to call out to remote systems, and as a ‘‘shell’’ for
       remote systems who call in.  For calling out  periodically,  a  typical
       line in crontab would be:

            0    *    *    *    *    /usr/lib/uucp/uucico -r1

       This  will  run uucico every hour in master role.  For each system that
       has transfer requests queued, uucico calls the  system,  logs  in,  and
       executes  the transfers. The file L.sys(5) is consulted for information
       about how to log in, while L-devices(5) specifies available  lines  and
       modems for calling.

       For  remote  systems to dial in, an entry in the passwd(5) file must be
       created, with a login ‘‘shell’’ of uucico.  For example:

            nuucp:Password:6:1::/usr/spool/uucppublic:/usr/lib/uucp/uucico

       The UID for UUCP remote logins is not critical, so long as  it  differs
       from  the  UUCP  Administrative login.  The latter owns the UUCP files,
       and assigning this UID to a remote login would be an  extreme  security
       hazard.

FILES
       /usr/lib/uucp/                UUCP internal files/utilities
       /usr/lib/uucp/L-devices       Local device descriptions
       /usr/lib/uucp/L-dialcodes     Phone numbers and prefixes
       /usr/lib/uucp/L.aliases       Hostname aliases
       /usr/lib/uucp/L.cmds          Remote command permissions list
       /usr/lib/uucp/L.sys           Host connection specifications
       /usr/lib/uucp/USERFILE        Remote directory tree permissions list

       /usr/spool/uucp/              Spool directory
       /usr/spool/uucp/AUDIT/*       Debugging audit trails
       /usr/spool/uucp/C./           Control files directory
       /usr/spool/uucp/D./           Incoming data file directory
       /usr/spool/uucp/D.hostname/   Outgoing data file directory
       /usr/spool/uucp/D.hostnameX/  Outgoing execution file directory
       /usr/spool/uucp/CORRUPT/      Place for corrupted C. and D. files
       /usr/spool/uucp/ERRLOG        UUCP internal error log
       /usr/spool/uucp/LOGFILE       UUCP system activity log
       /usr/spool/uucp/LCK/LCK..*    Device lock files
       /usr/spool/uucp/SYSLOG        File transfer statistics log
       /usr/spool/uucp/STST/*        System status files
       /usr/spool/uucp/TM./          File transfer temp directory
       /usr/spool/uucp/X./           Incoming execution file directory

       /usr/spool/uucppublic         Public access directory

SEE ALSO
       uucp(1C), uuq(1C), uux(1C), L-devices(5), L-dialcodes(5), L.aliases(5),
       L.cmds(5), L.sys(5), uuclean(8C), uupoll(8C), uusnap(8C), uuxqt(8C)

       D. A. Nowitz and M. E. Lesk, A Dial-Up Network of UNIX Systems.

       D. A. Nowitz, Uucp Implementation Description.


4.3 Berkeley Distribution        May 15, 1986                       UUCICO(8C)
 
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