Zabbix 6 regexp: incorrect expression "6\.0"

[tuxmartin]

Hi,
I have been using regular expression "6\.0" for many years without problem.
But now it is invalid:

Cannot update trigger
Invalid parameter "/1/expression": incorrect expression starting from "find(/APP Zabbix Proxy/zabbix[version],1m,"regexp","6\.0")=0".​

I'm using Zabbix 6.0.10. I'm not sure if it is broken since upgrade to Zabbix 6.0 or after update to some patch version 6.0.x.

I need to check if zabbix proxy version is exactly "6.0".
I found info about PCRE2 https://www.zabbix.com/documentation...ching-to-pcre2 but if I try my regex on the page https://regex101.com/r/toKR96/1 it's compatible with PCRE and PCRE2 too:


How can I fix it?

Thanks.

[markfree]

The issue there has to do with the backslash character within your expression, (\).
You can remove it, then, your function will become valid and your dot character will be interpred as any character.

I would also suggest removing the first parameter "1m" as it seems your trigger is evaluating the latest value from your item.
The "find" function already defaults to the latest value if not specified.

find(/APP Zabbix Proxy/zabbix[version],,"regexp","6.0")=0

[tim.mooney]

Does it make a difference if you use single quotes around the regex?

If that doesn't make a difference, does it make a difference if you double up the backslashes?

I agree that your regex is valid and I agree there's a reason to want the backslash there. My guess is that there's some interplay with backslash parsing in strings in Zabbix.

[tuxmartin]

incorrect expression (single/double quotes):

find(/APP Zabbix Proxy/zabbix[version],,"regexp","^6\.0")=0
find(/APP Zabbix Proxy/zabbix[version],,"regexp",'^6\.0')=0

valid expression, but not working:

find(/APP Zabbix Proxy/zabbix[version],,"regexp","^6\\.0")=0

this works great:

find(/APP Zabbix Proxy/zabbix[version],,"regexp","^6.0")=0

But I would like to know how to escape dot. Sometimes it can come in handy.

[Markku]

I'd say it is a bug. Please open an issue in https://support.zabbix.com

(If there isn't one already)

Markku

[Markku]

I need to check if zabbix proxy version is exactly "6.0".

Would this do: "^6[.]0"

Markku

[markfree]

Would this do: "^6[.]0"
Markku

It accepts brackets between the dot and the result is positive.

find(/APP Zabbix Proxy/zabbix[version],,"regexp",'^6[.]0')

Still, as tuxmartin mentioned, it would be nice to escape the dot character.

Therefore, I've created the issue ZBX-21998.

[Hamardaban]

It seems to have been fixed in version 6.0.11

[markfree]

My tests used Zabbix 6.2 and, after upgrading to 6.2.5, the issue is still present.

Can you confirm that it was fixed in 6.0.11?

[Hamardaban]

https://www.zabbix.com/rn/rn6.2.5

https://www.zabbix.com/rn/rn6.0.11

-> Bug Fixes

[markfree]

Both release notes mention 2 fixes with incorrect backslash escaping. As I understand it, they are not the same issue.
As I said, in my testing with version 6.2.5, the issue is still present.

When you said it seemed fixed for version 6.0.11, I thought you had tested it out.

[zabbixuserfk]

Hello,
I think I have a similar issue on Zabbix 6.4.2. Is it supposed to be fixed please ?

[markfree]

I think I have a similar issue on Zabbix 6.4.2. Is it supposed to be fixed please ?

I believe this was fixed in issue ZBX-21898.

Available in versions:

• pre-6.0.22rc1 41efef3ba25
• pre-6.4.7rc1 b9a84708d14
• pre-7.0.0alpha9 bb26f349c6e

Updated documentation:

• Escaping examples: 6.0, 6.4, 7.0 (new page)

In my tests with Zabbix 6.4.11, it now works as expected.

[omar.cacciotti]

I believe this was fixed in issue ZBX-21898.




In my tests with Zabbix 6.4.11, it now works as expected.

It seems that it doesn't work again in Zabbix 7.0

This regex is valid but not working

[B]^[A-Z]{3}AT[A-Z][0-9]\.D20[0-9]{5}\.T[0-9]{6}[/B]

I'm trying to double backslash the dot

[markfree]

It seems that it doesn't work again in Zabbix 7.0
This regex is valid but not working

[B]^[A-Z]{3}AT[A-Z][0-9]\.D20[0-9]{5}\.T[0-9]{6}[/B]

I'm trying to double backslash the dot

You could try to test this expression with a testing tool like RegexR.
There are also some examples in the documentation that might help.

[cyber]

It seems that it doesn't work again in Zabbix 7.0

This regex is valid but not working

[B]^[A-Z]{3}AT[A-Z][0-9]\.D20[0-9]{5}\.T[0-9]{6}[/B]

I'm trying to double backslash the dot

Not valid as it seems... but has nothing to do with escaping dots...

[omar.cacciotti]

Sorry I didn't see and .. it is a refuse. I suppose a copy/past error.
The regex is ^[A-Z]{3}AT[A-Z][0-9]\.D20[0-9]{5}\.T[0-9]{6}

But i had to double backslash the dot to get it working correctly. With a single \ it raise an error

[omar.cacciotti]

Sorry I didn't see

 [B] and [/B]

during my answer .. it is a refuse. I suppose a copy/past error.
The regex is ^[A-Z]{3}AT[A-Z][0-9]\.D20[0-9]{5}\.T[0-9]{6}

But i had to double backslash the dot to get it working correctly. With a single \ it raise an error