Man Linux: Main Page and Category List


       uucico - UUCP file transfer daemon


       uucico [ options ]


       The  uucico  daemon processes file transfer requests queued by uucp (1)
       and uux (1).  It is started when uucp or uux is run  (unless  they  are
       given  the -r option).  It is also typically started periodically using
       entries in the crontab table(s).

       When invoked with -r1, --master, -s, --system, or -S, the  daemon  will
       place a call to a remote system, running in master mode.  Otherwise the
       daemon will start in slave mode, accepting a call from a remote system.
       Typically  a  special  login  name  will  be  set  up  for  UUCP  which
       automatically invokes uucico when a call is made.

       When uucico terminates, it invokes the uuxqt (8) daemon, unless the  -q
       or  --nouuxqt  option  is  given;  uuxqt  (8)  executes any work orders
       created by uux (1) on a remote system,  and  any  work  orders  created
       locally which have received remote files for which they were waiting.

       If  a call fails, uucico will normally refuse to retry the call until a
       certain  (configurable)  amount  of  time  has  passed.   This  may  be
       overriden by the -f, --force, or -S option.

       The  -l, --prompt, -e, or --loop options may be used to force uucico to
       produce its own prompts of "login: "  and  "Password:".   When  another
       daemon  calls  in,  it will see these prompts and log in as usual.  The
       login name and password will normally be  checked  against  a  separate
       list  kept specially for uucico rather than the /etc/passwd file; it is
       possible on some systems to direct uucico to use the /etc/passwd  file.
       The  -l or --prompt option will prompt once and then exit; in this mode
       the UUCP administrator or the superuser  may  use  the  -u  or  --login
       option  to force a login name, in which case uucico will not prompt for
       one.  The -e or --loop option will prompt again after the first session
       is over; in this mode uucico will permanently control a port.

       If  uucico  receives  a  SIGQUIT,  SIGTERM  or  SIGPIPE signal, it will
       cleanly abort any current conversation with a remote system  and  exit.
       If  it receives a SIGHUP signal it will abort any current conversation,
       but will continue to place calls to (if invoked with -r1  or  --master)
       and accept calls from (if invoked with -e or --loop) other systems.  If
       it receives a SIGINT signal it will finish  the  current  conversation,
       but will not place or accept any more calls.


       The following options may be given to uucico.

       -r1, --master
            Start  in  master  mode  (call  out  to  a system); implied by -s,
            --system, or -S.  If no system is specified, call any  system  for
            which work is waiting to be done.

       -r0, --slave
            Start in slave mode.  This is the default.

       -s system, --system system
            Call the named system.

       -S system
            Call  the  named  system,  ignoring  any  required  wait.  This is
            equivalent to -s system -f.

       -f, --force
            Ignore any required wait for any systems to be called.

       -l, --prompt
            Prompt  for  login  name  and  password  using   "login:   "   and
            "Password:".   This allows uucico to be easily run from inetd (8).
            The login name and password are checked against the UUCP  password
            file,  which  probably  has no connection to the file /etc/passwd.
            The --login option may be used to force a  login  name,  in  which
            cause uucico will only prompt for a password.

       -p port, --port port
            Specify a port to call out on or to listen to.

       -e, --loop
            Enter endless loop of login/password prompts and slave mode daemon
            execution.  The program will not stop by itself; you must use kill
            (1) to shut it down.

       -w, --wait
            After calling out (to a particular system when -s, --system, or -S
            is specifed, or to all systems which have work when  just  -r1  or
            --master is specifed), begin an endless loop as with --loop.

       -q, --nouuxqt
            Do not start the uuxqt (8) daemon when finished.

       -c, --quiet
            If  no calls are permitted at this time, then don’t make the call,
            but also do not put an error message in the log file  and  do  not
            update the system status (as reported by uustat (1)).  This can be
            convenient for automated polling scripts, which may want to simply
            attempt  to  call  every  system  rather  than  worry  about which
            particular systems may be called at the moment.  This option  also
            suppresses  the log message indicating that there is no work to be

       -C, --ifwork
            Only call the system named by -s, --system or -S if there is  work
            for that system.

       -D, --nodetach
            Do  not  detach  from  the  controlling terminal.  Normally uucico
            detaches from the terminal before each call out to another  system
            and before invoking uuxqt.  This option prevents this.

       -u name, --login name
            Set  the  login  name to use instead of that of the invoking user.
            This option may only be used by  the  UUCP  administrator  or  the
            superuser.   If  used  with  --prompt,  this  will cause uucico to
            prompt only for the password, not the login name.

       -z, --try-next
            If a call fails after the remote system is reached, try  the  next
            alternate rather than simply exiting.

       -i type, --stdin type
            Set  the  type of port to use when using standard input.  The only
            support port type is TLI, and this is only available  on  machines
            which  support  the  TLI  networking  interface.  Specifying -iTLI
            causes uucico to use TLI calls to perform I/O.

       -x type, -X type, --debug type
            Turn on particular  debugging  types.   The  following  types  are
            recognized:  abnormal,  chat,  handshake, uucp-proto, proto, port,
            config, spooldir, execute, incoming, outgoing.

            Multiple types may be given, separated by commas, and the  --debug
            option  may  appear  multiple  times.  A number may also be given,
            which will turn on that many types from the  foregoing  list;  for
            example, --debug 2 is equivalent to --debug abnormal,chat.

            The  debugging  output is sent to the debugging file, which may be
            printed using uulog -D.

       -I file, --config file
            Set configuration file to use.  This option may not be  available,
            depending upon how uucico was compiled.

       -v, --version
            Report version information and exit.

            Print a help message and exit.


       kill(1), uucp(1), uux(1), uustat(1), uuxqt(8)


       Ian Lance Taylor <>

                               Taylor UUCP 1.07                      uucico(8)