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(*
Module: Resolv
Parses /etc/resolv.conf
Author: Raphael Pinson <raphink@gmail.com>
About: Reference
This lens tries to keep as close as possible to `man resolv.conf` where possible.
About: Licence
This file is licensed under the LGPL v2+, like the rest of Augeas.
About: Lens Usage
About: Configuration files
This lens applies to /etc/resolv.conf. See <filter>.
*)
module Resolv =
autoload xfm
(************************************************************************
* Group: USEFUL PRIMITIVES
*************************************************************************)
(* View: comment *)
let comment = Util.comment_generic /[ \t]*[;#][ \t]*/ "# "
(* View: comment_eol *)
let comment_eol = Util.comment_generic /[ \t]*[;#][ \t]*/ " # "
(* View: empty *)
let empty = Util.empty_generic_dos /[ \t]*[#;]?[ \t]*/
(************************************************************************
* Group: MAIN OPTIONS
*************************************************************************)
(* View: netmask
A network mask for IP addresses *)
let netmask = [ label "netmask" . Util.del_str "/" . store Rx.ip ]
(* View: ipaddr
An IP address or range with an optional mask *)
let ipaddr = [label "ipaddr" . store Rx.ip . netmask?]
(* View: nameserver
A nameserver entry *)
let nameserver = Build.key_value_line_comment
"nameserver" Sep.space (store Rx.ip) comment_eol
(* View: domain *)
let domain = Build.key_value_line_comment
"domain" Sep.space (store Rx.word) comment_eol
(* View: search *)
let search = Build.key_value_line_comment
"search" Sep.space
(Build.opt_list
[label "domain" . store Rx.word]
Sep.space)
comment_eol
(* View: sortlist *)
let sortlist = Build.key_value_line_comment
"sortlist" Sep.space
(Build.opt_list
ipaddr
Sep.space)
comment_eol
(* View: lookup *)
let lookup =
let lookup_entry = Build.flag("bind"|"file"|"yp")
in Build.key_value_line_comment
"lookup" Sep.space
(Build.opt_list
lookup_entry
Sep.space)
comment_eol
(* View: family *)
let family =
let family_entry = Build.flag("inet4"|"inet6")
in Build.key_value_line_comment
"family" Sep.space
(Build.opt_list
family_entry
Sep.space)
comment_eol
(************************************************************************
* Group: SPECIAL OPTIONS
*************************************************************************)
(* View: ip6_dotint
ip6-dotint option, which supports negation *)
let ip6_dotint =
let negate = [ del "no-" "no-" . label "negate" ]
in [ negate? . key "ip6-dotint" ]
(* View: options
Options values *)
let options =
let options_entry = Build.key_value ("ndots"|"timeout"|"attempts")
(Util.del_str ":") (store Rx.integer)
| Build.flag ("debug"|"rotate"|"no-check-names"
|"inet6"|"ip6-bytestring"|"edns0"
|"single-request"|"single-request-reopen"
|"no-tld-query"|"use-vc"|"no-reload"
|"trust-ad")
| ip6_dotint
in Build.key_value_line_comment
"options" Sep.space
(Build.opt_list
options_entry
Sep.space)
comment_eol
(* View: entry *)
let entry = nameserver
| domain
| search
| sortlist
| options
| lookup
| family
(* View: lns *)
let lns = ( empty | comment | entry )*
(* Variable: filter *)
let filter = (incl "/etc/resolv.conf")
let xfm = transform lns filter