uucico(8) System Manager's Manual uucico(8)
uucico - Transfers uucp command, data, and execute files to remote systems
uucico [-r role_number] [-x debug_level] [-s system_name]
The role_numbers are 1 for server mode and 0 (zero) for client mode. The default is 0 (zero). If uucico is started manually, set this
flag to 1. Displays debugging information on the screen of the local terminal. The valid range for debug_level is 0 to 9. The higher the
number, the more detailed the final report. This flag is useful in correcting problems with the expect_send sequence in the Systems file.
The name of the remote system. Use only when starting uucico manually. The system_name is supplied internally when uucico is started
Note that system names must contain only ASCII characters.
The uucico daemon transports uucp Command (C.*), Data (D.*), and Execute (E.*) files created by the uucp and uux commands to a specified
remote system. Both the local and remote systems run the uucico daemon, and the two daemons communicate with each other to complete trans-
The uucico daemon performs the following actions: Scans the spooling directory (/usr/spool/uucp/system_name) on the local system for trans-
fer requests. Selects the device used for the communications connection after checking the /usr/lib/uucp/Devices file and the lock files
in the /var/spool/locks directory. Places a call to the specified remote system using information in the Systems, Dialers, and Dialcodes
files located in the /usr/lib/uucp directory. Performs the required login sequence specified in the Systems file. Checks permissions
listed in the /usr/lib/uucp/Permissions file. Checks scheduling limits in the Maxuuscheds and Maxuuxqts files located in the /usr/lib/uucp
directory. Runs all transfer requests from both the local and the remote system, placing the transferred files in the public directories
(/usr/spool/uucppublic/*). Logs transfer requests and completions in files in the /usr/spool/uucp/.Log/uucico directory. Notifies speci-
fied users of transfer requests.
Usually the uucico daemon is called by the uucp and uux commands when needed, and is started periodically by the uucp scheduling daemon,
uusched, which is started by the cron daemon.
The uucico daemon can be started from the command line for debugging. The uucp command uutry also starts uucico with debugging turned on.
In the case of a uux command request for the execution of a command on a remote system, the uucico daemon transfers the files, and the
uuxqt daemon executes the command on the remote system.
The following environment variables affect the execution of uucico: Specifies the flow control used on the connection. Permitted values
are: HW (hardware), SW (software), HSW (hardware and software), and NONE. The uugetty on the remote system must also use the same flow con-
trol. Specifies the amount of time (in seconds) for uucico to try to establish a connection before it times out. A value of 0 (zero)
indicates an unlimited amount of time.
To start the uucico daemon from the command line as a background process and contact the remote system hera, enter: /usr/lib/uucp/uucico
-r1 -shera & To debug uucico connections, start the uucico daemon with the -x flag, and enter: /usr/lib/uucp/uucico -r1 -svenus -x9
Specifies the command path The uucp configuration files Contains lock files that prevent multiple uses of devices and multiple calls to
systems Contains all the configuration files for uucp Contains information about available devices Contains dial-code abbreviations Speci-
fies initial handshaking on a link Limits scheduled jobs Limits remote command executions Describes access permissions for remote systems
Describes accessible remote systems Lists uucico daemon errors that uucp cannot correct Contains uucico daemon log files Lists the last
time a remote system was contacted and the minimum time until the next retry Contains C.*, D.*, and E.* files to be transferred by the
uucico daemon Command files Data files Execute files Contains files after transfer by the uucico daemon
Commands: cron(8), uucp(1), uustat(1), uutry(1), uuto(1), uux(1) delim off