186 lines
6.2 KiB
Plaintext
186 lines
6.2 KiB
Plaintext
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(* inetd.conf lens definition for Augeas
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Auther: Matt Palmer <mpalmer@hezmatt.org>
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Copyright (C) 2009 Matt Palmer, All Rights Reserved
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This program is free software: you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License version 2.1 as
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published by the Free Software Foundation.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program. If not, see <http://www.gnu.org/licenses/>.
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This lens parses /etc/inetd.conf. The current format is based on the
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syntax documented in the inetd manpage shipped with Debian's openbsd-inetd
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package version 0.20080125-2. Apologies if your inetd.conf doesn't follow
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the same format.
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Each top-level entry will have a key being that of the service name (the
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first column in the service definition, which is the name or number of the
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port that the service should listen on). The attributes for the service all
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sit under that. In regular Augeas style, the order of the attributes
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matter, and attempts to set things in a different order will fail miserably.
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The defined attribute names (and the order in which they must appear) are as
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follows (with mandatory parameters indicated by [*]):
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address -- a sequence of IP addresses or hostnames on which this service
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should listen.
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socket[*] -- The type of the socket that will be created (either stream or
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dgram, although the lens doesn't constrain the possibilities here)
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protocol[*] -- The socket protocol. I believe that the usual possibilities
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are "tcp", "udp", or "unix", but no restriction is made on what you
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can actually put here.
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sndbuf -- Specify a non-default size for the send buffer of the connection.
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rcvbuf -- Specify a non-default size for the receive buffer of the connection.
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wait[*] -- Whether to wait for new connections ("wait"), or just terminate
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immediately ("nowait").
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max -- The maximum number of times that a service can be invoked in one minute.
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user[*] -- The user to run the service as.
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group -- A group to set the running service to, rather than the primary
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group of the previously specified user.
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command[*] -- What program to run.
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arguments -- A sequence of arguments to pass to the command.
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In addition to this straightforward tree, inetd has the ability to set
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"default" listen addresses; this is a little used feature which nonetheless
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comes in handy sometimes. The key for entries of this type is "address"
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, and the subtree should be a sequence of addresses. "*" can
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always be used to return the default behaviour of listening on INADDR_ANY.
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*)
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module Inetd =
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autoload xfm
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(***************************
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* PRIMITIVES
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***************************)
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(* Store whitespace *)
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let wsp = del /[ \t]+/ " "
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let sep = del /[ \t]+/ " "
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let owsp(t:string) = del /[ \t]*/ t
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(* It's the end of the line as we know it... doo, doo, dooooo *)
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let eol = Util.eol
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(* In the beginning, the earth was without form, and void *)
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let empty = Util.empty
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let comment = Util.comment
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let del_str = Util.del_str
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let address = [ seq "addrseq" . store /([a-zA-Z0-9.-]+|\[[A-Za-z0-9:?*%]+\]|\*)/ ]
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let address_list = ( counter "addrseq" . (address . del_str ",")* . address )
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let argument = [ seq "argseq" . store /[^ \t\n]+/ ]
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let argument_list = ( counter "argseq" . [ label "arguments" . (argument . wsp)* . argument ] )
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(***************************
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* ELEMENTS
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***************************)
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let service (l:string) = ( label l . [label "address" . address_list . del_str ":" ]? . store /[^ \t\n\/:#]+/ )
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let socket = [ label "socket" . store /[^ \t\n#]+/ ]
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let protocol = ( [ label "protocol" . store /[^ \t\n,#]+/ ]
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. [ del_str "," . key /sndbuf/ . del_str "=" . store /[^ \t\n,]+/ ]?
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. [ del_str "," . key /rcvbuf/ . del_str "=" . store /[^ \t\n,]+/ ]?
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)
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let wait = ( [ label "wait" . store /(wait|nowait)/ ]
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. [ del_str "." . label "max" . store /[0-9]+/ ]?
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)
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let usergroup = ( [ label "user" . store /[^ \t\n:.]+/ ]
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. [ del /[:.]/ ":" . label "group" . store /[^ \t\n:.]+/ ]?
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)
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let command = ( [ label "command" . store /[^ \t\n]+/ ]
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. (wsp . argument_list)?
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)
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(***************************
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* SERVICE LINES
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***************************)
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let service_line = [ service "service"
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. sep
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. socket
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. sep
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. protocol
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. sep
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. wait
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. sep
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. usergroup
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. sep
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. command
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. eol
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]
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(***************************
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* RPC LINES
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***************************)
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let rpc_service = service "rpc_service" . Util.del_str "/"
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. [ label "version" . store Rx.integer ]
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let rpc_endpoint = [ label "endpoint-type" . store Rx.word ]
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let rpc_protocol = Util.del_str "rpc/"
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. (Build.opt_list
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[label "protocol" . store /[^ \t\n,#]+/ ]
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Sep.comma)
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let rpc_line = [ rpc_service
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. sep
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. rpc_endpoint
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. sep
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. rpc_protocol
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. sep
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. wait
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. sep
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. usergroup
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. sep
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. command
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. eol
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]
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(***************************
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* DEFAULT LISTEN ADDRESSES
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***************************)
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let default_listen_address = [ label "address"
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. address_list
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. del_str ":"
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. eol
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]
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(***********************
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* LENS / FILTER
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***********************)
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let lns = (comment|empty|service_line|rpc_line|default_listen_address)*
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let filter = incl "/etc/inetd.conf"
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let xfm = transform lns filter
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