[augeas-devel] How to match/delete commented lines with specific text?

[Raphaël Pinson]

Hi Dan,


You're not too far. You just missing the right operator for `regexp()`:
https://github.com/hercules-team/augeas/wiki/Path-expressions#tips--tricks

  /files/etc/hosts/*[ipaddr =~ regexp("192\..*")]


Raphaël


On Sat, Nov 14, 2020 at 10:39 PM Dan Mahoney (Gushi) <augeas at gushi.org>
wrote:

> All,
>
> We're trying at the day job to use Augtool to clean up some
> in-the-os-by-default comments.  Under FreeBSD, this is what you might find
> in a stock /etc/pam.d/sshd:
>
> match /files/etc/pam.d/sshd/*
> /files/etc/pam.d/sshd/#comment[1] = $FreeBSD: releng/11.4/etc/pam.d/sshd
> 197769 2009-10-05 09:28:54Z des $
> /files/etc/pam.d/sshd/#comment[2] = PAM configuration for the "sshd"
> service
> /files/etc/pam.d/sshd/#comment[3] = auth
> /files/etc/pam.d/sshd/1 = (none)
> /files/etc/pam.d/sshd/2 = (none)
> /files/etc/pam.d/sshd/#comment[4] = auth                sufficient
> pam_krb5.so             no_warn try_first_pass
> /files/etc/pam.d/sshd/#comment[5] = auth                sufficient
> pam_ssh.so              no_warn try_first_pass
> /files/etc/pam.d/sshd/3 = (none)
> /files/etc/pam.d/sshd/#comment[6] = account
> /files/etc/pam.d/sshd/4 = (none)
> /files/etc/pam.d/sshd/#comment[7] = account     required pam_krb5.so
> /files/etc/pam.d/sshd/5 = (none)
> /files/etc/pam.d/sshd/6 = (none)
> /files/etc/pam.d/sshd/#comment[8] = session
> /files/etc/pam.d/sshd/#comment[9] = session     optional        pam_ssh.so
> want_agent
> /files/etc/pam.d/sshd/7 = (none)
> /files/etc/pam.d/sshd/#comment[10] = password
> /files/etc/pam.d/sshd/#comment[11] = password   sufficient pam_krb5.so
> no_warn try_first_pass
> /files/etc/pam.d/sshd/8 = (none)
>
> And what I can't seem to find out how to do is match comments by name. For
> example, if I wanted to match any (or delete) any comment that include
> pam_krb5, how would I do it?
>
> As a comment, the usual parsing rules don't apply, and in all the wiki
> docs I can't find a clean example about "This is how you match a string by
> name".  (Call this a docbug maybe?)
>
> Help?
>
> -Dan
>
> PS, here's some of the things I've been trying -- am I just barking up the
> wrong tree here?
>
> augtool> match /files/etc/pam.d/sshd/#comment[ value = freebsd ]
>    (no matches)
> augtool> match /files/etc/pam.d/sshd/#comment[ value = "freebsd" ]
>    (no matches)
> augtool> match /files/etc/pam.d/sshd/#comment[ value() = "freebsd" ]
> error: Invalid path expression
> error: empty name
> /files/etc/pam.d/sshd/#comment[ |=|value() = "freebsd" ]
> augtool> match /files/etc/pam.d/sshd/#comment[ value = regex("freebsd") ]
> error: Invalid path expression
> error: empty name
> /files/etc/pam.d/sshd/#comment[ value = |=|regex("freebsd") ]
> augtool> match /files/etc/pam.d/sshd/#comment[ value = regexp("freebsd") ]
> error: Invalid path expression
> error: type error
> /files/etc/pam.d/sshd/#comment[ value = regexp("freebsd") ]|=|
> augtool> match /files/etc/pam.d/sshd/#comment[ value = regexp("freebsd") ]
> error: Invalid path expression
> error: type error
> /files/etc/pam.d/sshd/#comment[ value = regexp("freebsd") ]|=|
> augtool> match /files/etc/pam.d/sshd/#comment[ regexp("freebsd") ]
> error: Invalid path expression
> error: type error
> /files/etc/pam.d/sshd/#comment[ regexp("freebsd") ]|=|
> augtool> match /files/etc/pam.d/sshd/#comment[ regexp(freebsd) ]
> error: Invalid path expression
> error: type error
> /files/etc/pam.d/sshd/#comment[ regexp(freebsd) ]|=|
> augtool> match /files/etc/pam.d/sshd/#comment[ regexp(/freebsd/) ]
> error: Invalid path expression
> error: empty name
>
>
> --
>
> --------Dan Mahoney--------
> Techie,  Sysadmin,  WebGeek
> Gushi on efnet/undernet IRC
> FB:  fb.com/DanielMahoneyIV
> LI:   linkedin.com/in/gushi
> Site:  http://www.gushi.org
> ---------------------------
>
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>

-- 
Raphaël Pinson
Infrastructure Developer & Training Leader
+41 21 619 10 65

Camptocamp SA
EPFL Innovation Park, Bât A
1015 Lausanne

www.camptocamp.com
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