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| Current File : //opt/osquery/share/osquery/lenses/ntpd.aug |
(*
Module: Ntpd
Parses OpenNTPD's ntpd.conf
Author: Jasper Lievisse Adriaanse <jasper@jasper.la>
About: Reference
This lens is used to parse OpenNTPD's configuration file, ntpd.conf.
http://openntpd.org/
About: Usage Example
To be documented
About: License
This file is licensed under the LGPL v2+, like the rest of Augeas.
About: Configuration files
This lens applies to /etc/ntpd.conf.
See <filter>.
*)
module Ntpd =
autoload xfm
(************************************************************************
* Group: Utility variables/functions
************************************************************************)
(* View: comment *)
let comment = Util.comment
(* View: empty *)
let empty = Util.empty
(* View: eol *)
let eol = Util.eol
(* View: space *)
let space = Sep.space
(* View: word *)
let word = Rx.word
(* View: device_re *)
let device_re = Rx.device_name | /\*/
(* View: address_re *)
let address_re = Rx.ip | /\*/ | Rx.hostname
(* View: stratum_re
value between 1 and 15 *)
let stratum_re = /1[0-5]|[1-9]/
(* View: refid_re
string with length < 5 *)
let refid_re = /[A-Za-z0-9_.-]{1,5}/
(* View: weight_re
value between 1 and 10 *)
let weight_re = /10|[1-9]/
(* View: rtable_re
0 - RT_TABLE_MAX *)
let rtable_re = Rx.byte
(* View: correction_re
should actually only match between -127000000 and 127000000 *)
let correction_re = Rx.relinteger_noplus
(************************************************************************
* View: key_opt_rtable_line
* A subnode with a keyword, an optional routing table id and an end
* of line.
*
* Parameters:
* kw:regexp - the pattern to match as key
* sto:lens - the storing lens
************************************************************************)
let key_opt_rtable_line (kw:regexp) (sto:lens) =
let rtable = [ Util.del_str "rtable" . space . label "rtable"
. store rtable_re ]
in [ key kw . space . sto . (space . rtable)? . eol ]
(************************************************************************
* View: key_opt_weight_rtable_line
* A subnode with a keyword, an optional routing table id, an optional
* weight-value and an end of line.
* of line.
*
* Parameters:
* kw:regexp - the pattern to match as key
* sto:lens - the storing lens
************************************************************************)
let key_opt_weight_rtable_line (kw:regexp) (sto:lens) =
let rtable = [ Util.del_str "rtable" . space . label "rtable" . store rtable_re ]
in let weight = [ Util.del_str "weight" . space . label "weight"
. store weight_re ]
in [ key kw . space . sto . (space . weight)? . (space . rtable)? . eol ]
(************************************************************************
* View: opt_value
* A subnode for optional values.
*
* Parameters:
* s:string - the option name and subtree label
* r:regexp - the pattern to match as store
************************************************************************)
let opt_value (s:string) (r:regexp) =
Build.key_value s space (store r)
(************************************************************************
* Group: Keywords
************************************************************************)
(* View: listen
listen on address [rtable table-id] *)
let listen =
let addr = [ label "address" . store address_re ]
in key_opt_rtable_line "listen on" addr
(* View: server
server address [weight weight-value] [rtable table-id] *)
let server =
let addr = [ label "address" . store address_re ]
in key_opt_weight_rtable_line "server" addr
(* View: servers
servers address [weight weight-value] [rtable table-id] *)
let servers =
let addr = [ label "address" . store address_re ]
in key_opt_weight_rtable_line "servers" addr
(* View: sensor
sensor device [correction microseconds] [weight weight-value] [refid
string] [stratum stratum-value] *)
let sensor =
let device = [ label "device" . store device_re ]
in let correction = opt_value "correction" correction_re
in let weight = opt_value "weight" weight_re
in let refid = opt_value "refid" refid_re
in let stratum = opt_value "stratum" stratum_re
in [ key "sensor" . space . device
. (space . correction)?
. (space . weight)?
. (space . refid)?
. (space . stratum)?
. eol ]
(************************************************************************
* Group: Lens
************************************************************************)
(* View: keyword *)
let keyword = listen | server | servers | sensor
(* View: lns *)
let lns = ( empty | comment | keyword )*
(* View: filter *)
let filter = (incl "/etc/ntpd.conf")
let xfm = transform lns filter