Trim not working for me

[highway_fixer_man]

Hi,

I have an item that returns file info. (vfs.file.get[/home/user/file.txt]

I get back a string that looks like this:

{"basename":"antipase_tag.txt","pathname":"/home/user/file.txt","dirname":"/home/user/","type":"file","user":"appuser","group":"appgroup ","permissions":"0664","uid":1000,"gid":300,"size" :86,"time":{"access":"2023-05-23T13:19:10.989292448+02:00","modify":"2023-05-23T13:19:10.989292448+02:00","change":"2023-05-23T13:19:10.989292448+02:00"},"timestamp":{"access ":1684840750,"modify":1684840750,"change":16848407 50}}

I want to clean this up so that everything after "size" is removed. Basically, I need to know if this files permissions have changed - and I think this is the best way.

I thought a "Right Trim" was the answer here - but its not working for me.

If I use a "Left Trim" it also doesn't trim!

I have tried every variation of the "size" marker as possible - "size" "size" *size* *size. etc - I really just cant get this to work. Seems like something simple.

Any help appreciated.

[Hamardaban]

You misunderstood how this function works - it removes a previously known set of characters. Without substitutions.
Example: input - "000123" \ the right trim function with param "123" will return "000".
You need another function - Regular expression!
https://www.zabbix.com/documentation.../preprocessing

(
for your case:
pattern = ^(.*)size.*$
output = \1
)

[Hamardaban]

You misunderstood how this function works - it removes a previously known set of characters. Without substitutions.
Example: input - "000123" \ the right trim function with param "123" will return "000".
You need another function - Regular expression!
https://www.zabbix.com/documentation.../preprocessing

(
for your case:
pattern = ^(.*)size.*$
output = \1
)

[highway_fixer_man]

You misunderstood how this function works - it removes a previously known set of characters. Without substitutions.
Example: input - "000123" \ the right trim function with param "123" will return "000".
You need another function - Regular expression!
https://www.zabbix.com/documentation.../preprocessing

(
for your case:
pattern = ^(.*)size.*$
output = \1
)

Thank you so much, Hamardaban - exactly what I needed. Very much appreciated.