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(*
Module: Cron
Parses /etc/cron.d/*, /etc/crontab
Author: Raphael Pinson <raphink@gmail.com>
About: Reference
This lens tries to keep as close as possible to `man 5 crontab` 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
* Get the entry that launches '/usr/bin/ls'
> match '/files/etc/crontab/entry[. = "/usr/bin/ls"]'
About: Configuration files
This lens applies to /etc/cron.d/* and /etc/crontab. See <filter>.
*)
module Cron =
autoload xfm
(************************************************************************
* Group: USEFUL PRIMITIVES
*************************************************************************)
(* Group: Generic primitives *)
(* Variable: eol *)
let eol = Util.eol
(* Variable: indent *)
let indent = Util.indent
(* Variable: comment *)
let comment = Util.comment
(* Variable: empty *)
let empty = Util.empty
(* Variable: num *)
let num = /[0-9*][0-9\/,*-]*/
(* Variable: alpha *)
let alpha = /[A-Za-z]{3}/
(* Variable: alphanum *)
let alphanum = (num|alpha) . ("-" . (num|alpha))?
(* Variable: entry_prefix *)
let entry_prefix = /-/
(* Group: Separators *)
(* Variable: sep_spc *)
let sep_spc = Util.del_ws_spc
(* Variable: sep_eq *)
let sep_eq = Util.del_str "="
(************************************************************************
* Group: ENTRIES
*************************************************************************)
(************************************************************************
* View: shellvar
* A shell variable in crontab
*************************************************************************)
let shellvar =
let key_re = /[A-Za-z1-9_-]+(\[[0-9]+\])?/ - "entry" in
let sto_to_eol = store /[^\n]*[^ \t\n]/ in
[ key key_re . sep_eq . sto_to_eol . eol ]
(* View: - prefix of an entry *)
let prefix = [ label "prefix" . store entry_prefix ]
(* View: minute *)
let minute = [ label "minute" . store num ]
(* View: hour *)
let hour = [ label "hour" . store num ]
(* View: dayofmonth *)
let dayofmonth = [ label "dayofmonth" . store num ]
(* View: month *)
let month = [ label "month" . store alphanum ]
(* View: dayofweek *)
let dayofweek = [ label "dayofweek" . store alphanum ]
(* View: user *)
let user = [ label "user" . store Rx.word ]
(************************************************************************
* View: time
* Time in the format "minute hour dayofmonth month dayofweek"
*************************************************************************)
let time = [ label "time" .
minute . sep_spc . hour . sep_spc . dayofmonth
. sep_spc . month . sep_spc . dayofweek ]
(* Variable: the valid values for schedules *)
let schedule_re = "reboot" | "yearly" | "annually" | "monthly"
| "weekly" | "daily" | "midnight" | "hourly"
(************************************************************************
* View: schedule
* Time in the format "@keyword"
*************************************************************************)
let schedule = [ label "schedule" . Util.del_str "@"
. store schedule_re ]
(************************************************************************
* View: entry
* A crontab entry
*************************************************************************)
let entry = [ label "entry" . indent
. prefix?
. ( time | schedule )
. sep_spc . user
. sep_spc . store Rx.space_in . eol ]
(*
* View: lns
* The cron lens
*)
let lns = ( empty | comment | shellvar | entry )*
(* Variable: filter *)
let filter =
incl "/etc/cron.d/*" .
incl "/etc/crontab" .
incl "/etc/crontabs/*" .
excl "/etc/cron.d/at.allow" .
excl "/etc/cron.d/at.deny" .
excl "/etc/cron.d/cron.allow" .
excl "/etc/cron.d/cron.deny" .
Util.stdexcl
let xfm = transform lns filter