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| Current File : //usr/share/augeas/lenses/dist/sshd.aug |
(*
Module: Sshd
Parses /etc/ssh/sshd_config
Author: David Lutterkort lutter@redhat.com
Dominique Dumont dominique.dumont@hp.com
About: Reference
sshd_config man page.
See http://www.openbsd.org/cgi-bin/man.cgi?query=sshd_config&sektion=5
About: License
This file is licensed under the LGPL v2+.
About: Lens Usage
Sample usage of this lens in augtool:
* Get your current setup
> print /files/etc/ssh/sshd_config
...
* Set X11Forwarding to "no"
> set /files/etc/ssh/sshd_config/X11Forwarding "no"
More advanced usage:
* Set a Match section
> set /files/etc/ssh/sshd_config/Match[1]/Condition/User "foo"
> set /files/etc/ssh/sshd_config/Match[1]/Settings/X11Forwarding "yes"
Saving your file:
> save
About: CAVEATS
In sshd_config, Match blocks must be located at the end of the file.
This means that any new "global" parameters (i.e. outside of a Match
block) must be written before the first Match block. By default,
Augeas will write new parameters at the end of the file.
I.e. if you have a Match section and no ChrootDirectory parameter,
this command:
> set /files/etc/ssh/sshd_config/ChrootDirectory "foo"
will be stored in a new node after the Match section and Augeas will
refuse to save sshd_config file.
To create a new parameter as the right place, you must first create
a new Augeas node before the Match section:
> ins ChrootDirectory before /files/etc/ssh/sshd_config/Match
Then, you can set the parameter
> set /files/etc/ssh/sshd_config/ChrootDirectory "foo"
About: Configuration files
This lens applies to /etc/ssh/sshd_config
*)
module Sshd =
autoload xfm
let eol = del /[ \t]*\n/ "\n"
let sep = Util.del_ws_spc
let key_re = /[A-Za-z0-9]+/
- /MACs|Match|AcceptEnv|Subsystem|(Allow|Deny)(Groups|Users)/
let comment = Util.comment
let empty = Util.empty
let array_entry (k:string) =
let value = store /[^ \t\n]+/ in
[ key k . [ sep . seq k . value]* . eol ]
let other_entry =
let value = store /[^ \t\n]+([ \t]+[^ \t\n]+)*/ in
[ key key_re . sep . value . eol ]
let accept_env = array_entry "AcceptEnv"
let allow_groups = array_entry "AllowGroups"
let allow_users = array_entry "AllowUsers"
let deny_groups = array_entry "DenyGroups"
let deny_users = array_entry "DenyUsers"
let subsystemvalue =
let value = store (/[^ \t\n](.*[^ \t\n])?/) in
[ key /[A-Za-z0-9\-]+/ . sep . value . eol ]
let subsystem =
[ key "Subsystem" . sep . subsystemvalue ]
let macs =
let mac_value = store /[^, \t\n]+/ in
[ key "MACs" . sep .
[ seq "macs" . mac_value ] .
([ seq "macs" . Util.del_str "," . mac_value])* .
eol ]
let condition_entry =
let value = store /[^ \t\n]+/ in
[ sep . key /[A-Za-z0-9]+/ . sep . value ]
let match_cond =
[ label "Condition" . condition_entry+ . eol ]
let match_entry =
( comment | empty | (Util.indent . other_entry) )
let match =
[ key "Match" . match_cond
. [ label "Settings" . match_entry+ ]
]
let lns = (comment | empty | accept_env | allow_groups | allow_users
| deny_groups | subsystem | deny_users | macs
| other_entry ) * . match*
let xfm = transform lns (incl "/etc/ssh/sshd_config")
(* Local Variables: *)
(* mode: caml *)
(* End: *)