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(*
Module: Crypttab
Parses /etc/crypttab from the cryptsetup package.
Author: Frédéric Lespez <frederic.lespez@free.fr>
About: Reference
This lens tries to keep as close as possible to `man crypttab` where possible.
About: License
This file is licensed under the LGPL v2+, like the rest of Augeas.
About: Lens Usage
Sample usage of this lens in augtool
* Create a new entry for an encrypted block devices
> ins 01 after /files/etc/crypttab/*[last()]
> set /files/etc/crypttab/01/target crypt_sda2
> set /files/etc/crypttab/01/device /dev/sda2
> set /files/etc/crypttab/01/password /dev/random
> set /files/etc/crypttab/01/opt swap
* Print the entry applying to the "/dev/sda2" device
> print /files/etc/crypttab/01
* Remove the entry applying to the "/dev/sda2" device
> rm /files/etc/crypttab/*[device="/dev/sda2"]
About: Configuration files
This lens applies to /etc/crypttab. See <filter>.
*)
module Crypttab =
autoload xfm
(************************************************************************
* Group: USEFUL PRIMITIVES
*************************************************************************)
(* Group: Separators *)
(* Variable: sep_tab *)
let sep_tab = Sep.tab
(* Variable: comma *)
let comma = Sep.comma
(* Group: Generic primitives *)
(* Variable: eol *)
let eol = Util.eol
(* Variable: comment *)
let comment = Util.comment
(* Variable: empty *)
let empty = Util.empty
(* Variable: word *)
let word = Rx.word
(* Variable: optval *)
let optval = /[A-Za-z0-9\/_.:-]+/
(* Variable: target *)
let target = Rx.device_name
(* Variable: fspath *)
let fspath = Rx.fspath
(* Variable: uuid *)
let uuid = /UUID=[0-9a-f-]+/
(************************************************************************
* Group: ENTRIES
*************************************************************************)
(************************************************************************
* View: comma_sep_list
* A comma separated list of options (opt=value or opt)
*************************************************************************)
let comma_sep_list (l:string) =
let value = [ label "value" . Util.del_str "=" . store optval ] in
let lns = [ label l . store word . value? ] in
Build.opt_list lns comma
(************************************************************************
* View: record
* A crypttab record
*************************************************************************)
let record = [ seq "entry" .
[ label "target" . store target ] . sep_tab .
[ label "device" . store (fspath|uuid) ] .
(sep_tab . [ label "password" . store fspath ] .
( sep_tab . comma_sep_list "opt")? )?
. eol ]
(*
* View: lns
* The crypttab lens
*)
let lns = ( empty | comment | record ) *
(* Variable: filter *)
let filter = (incl "/etc/crypttab")
let xfm = transform lns filter
(* coding: utf-8 *)