This file is indexed.

/etc/uucp/sys is in cu 1.07-20.1.

This file is owned by root:uucp, with mode 0o644.

The actual contents of the file can be viewed below.

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#
# sys		This is the file where you define all the remote
#		UUCP systems you know about, whether you dial in to them
#		or they dial in to you.
#
#		Note that if you want to dial into another system, you
#		have to enter the loginname and password NOT here but
#		in the file /etc/uucp/call.
#

#
# First some defaults. These are for all other entries (unless overridden).
#
protocol gvG
protocol-parameter G packet-size 1024
# protocol-parameter G window 7
protocol-parameter G short-packets

#
# Our remote uucp connection.
#
#system alphen
#call-login *
#call-password *
#time any
#phone 0172-419339
#port ACU
#chat "" \d\d\r\c ogin: \d\L word: \P

#
# This is an alternate - it means that if a connection using the
# above "system alphen" fails it falls through to this entry. Only
# useful if your service provider has more then one phone number for UUCP.
#
#alternate alphen-2
#alias alphen-2
#phone 0172-442580

#
# Here's another alternate - we poll the system over TCP/IP. This is
# useful if we have a PPP connection to our provider. The first two entries
# will fail because the modem is busy and we will poll over TCP/IP.
#
#
#alternate alphen-tcp
#alias alphen-tcp
#time any
#address uucp.cistron.nl
#port TCP
#protocol t

#
# Last example - a system that we poll over TCP/IP.
#
#system horizon
#call-login *
#call-password *
#time any
#chat "" \d\d\r\c ogin: \d\L word: \P
#address uucp.horizon.nl
#port TCP
#protocol t