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UUCICO(8)										UUCICO(8)

       uucico, uucpd - transfer files queued by uucp or uux

       /usr/sbin/uucico  [  -dspooldir ] [ -ggrade ] [ -rrole ] [ -R ] [ -ssystem ] [ -xdebug ] [
       -L ] [ -tturnaround ]


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

       The following options are available.

	       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 running 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 waiting for the local machine to finish.

	       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

       -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/sys-
	       tem.  When role is 0 (slave), debugging output is  always  written  to  the  AUDIT

       -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.

	       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  mas-
	       ter 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 ser-
       vice requests at the port indicated  in	the  ``uucp''  service	specification;	see  ser-
       vices(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  periodically  by  cron(8)  to
       call  out to remote systems, and as a ``shell'' for remote systems who call in.	For call-
       ing out periodically, a typical line in crontab would be:

	    0	 *    *    *	*    /usr/sbin/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:


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

       /etc/uucp/		     UUCP internal files
       /etc/uucp/L-devices	     Local device descriptions
       /etc/uucp/L-dialcodes	     Phone numbers and prefixes
       /etc/uucp/L.aliases	     Hostname aliases
       /etc/uucp/L.cmds 	     Remote command permissions list
       /etc/uucp/L.sys		     Host connection specifications
       /etc/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

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

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

       D. A. Nowitz, Uucp Implementation Description.

4.3 Berkeley Distribution		 October 23, 1996				UUCICO(8)
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