Crypttab - Augeas Documentation

# Crypttab

Parses /etc/crypttab from the cryptsetup package.

Author: Frédéric Lespez frederi.nosp@m.c.lespez@fre.nosp@m.e.fr

Summary

Crypttab | Parses /etc/crypttab from the cryptsetup package.
Reference | This lens tries to keep as close as possible to `man crypttab` where possible.
License | This file is licensed under the LGPL v2+, like the rest of Augeas.
Lens Usage | Sample usage of this lens in augtool
Configuration files | This lens applies to /etc/crypttab.
USEFUL PRIMITIVES |
Separators |
sep_tab |
comma |
Generic primitives |
eol |
comment |
empty |
word |
optval |
target |
fspath |
uuid |
ENTRIES |
comma_sep_list | A comma separated list of options (opt=value or opt)
record | A crypttab record
lns | The crypttab lens
filter |

### Reference

This lens tries to keep as close as possible to `man crypttab` where possible.

### License

This file is licensed under the LGPL v2+, like the rest of Augeas.

### 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"]

### Configuration files

This lens applies to /etc/crypttab. See filter.

### USEFUL PRIMITIVES

### Separators

### sep_tab

> let sep_tab = Sep.tab

### comma

> let comma = Sep.comma

### Generic primitives

### eol

> let eol = Util.eol

### comment

> let comment = Util.comment

### empty

> let empty = Util.empty

### word

> let word = Rx.word

### optval

> let optval = /[A-Za-z0-9\/_.:-]+/

### target

> let target = Rx.device_name

### fspath

> let fspath = Rx.fspath

### uuid

> let uuid = /UUID=[0-9a-f-]+/

### ENTRIES

### comma_sep_list

> 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

A comma separated list of options (opt=value or opt)

### 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 ]

A crypttab record

### lns

> let lns = ( empty | comment | record ) *

The crypttab lens

### filter

> let sep_tab = Sep.tab

> let comma = Sep.comma

> let eol = Util.eol

> let comment = Util.comment

> let empty = Util.empty

> let word = Rx.word

> let optval = /[A-Za-z0-9\/_.:-]+/

> let target = Rx.device_name

> let fspath = Rx.fspath

> let uuid = /UUID=[0-9a-f-]+/

> 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

A comma separated list of options (opt=value or opt)

> 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 ]

A crypttab record

> let lns = ( empty | comment | record ) *

The crypttab lens
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