json update boolean value

[D Panda]

Hi all,

I'm using Jansson to read and work on a Kubernetes configuration file. I have a line in the json file as follows :

I read it in my C program as this:

As expected, this gives me a boolean. But I need to change this value to "false". I found the methods for setting strings, integers, and other values but not for boolean. Please let me know how to update the value for a boolean using Jansson.

Thanks!

[D Panda]

I also considered deleting the key/value from the json object and adding it back in with the new value, but I cannot seem to set the key for boolean values.

[Graeme Smecher]

Hi D Panda,

If I understand your question correctly, something like:

json_object_set(K8S_TEMPLATE_SECURITY_CONTEXT,
"allowPrivilegeEscalation",
json_false());

or

json_object_set(K8S_TEMPLATE_SECURITY_CONTEXT,
"allowPrivilegeEscalation",
json_bool(0));

...should do what you want.

If a survey of the API is useful, then Jansson's test suites might be a
helpful resource. There are a few examples of the boolean API in
"test_simple.c" and "test_fixed_size.c" [1]. This code is intended to
test Jansson comprehensively (at the expense of being idiomatic).

If I am misunderstanding your question, please feel free to explain in
more detail (and please include code! It's always easier to help when
you provide source code.)

best,
Graeme

[1]:
https://github.com/akheron/jansson/blob/master/test/suites/api/test_fixed_size.c#L45

On 2022-05-02 05:52, 'D Panda' via Jansson users wrote:
> I also considered deleting the key/value from the json object and adding
> it back in with the new value, but I cannot seem to set the key for
> boolean values.
>
> On Monday, 2 May 2022 at 18:17:21 UTC+5:30 D Panda wrote:
>
> Hi all,
>
> I'm using Jansson to read and work on a Kubernetes configuration

> file. I have a line in the json file as follows :Screenshot from

> 2022-05-02 18-13-19.png
> I read it in my C program as this:

> Screenshot from 2022-05-02 18-14-29.png
>
> As expected, this gives me a boolean. But I need to change this
> value to "false". I found the methods for setting strings, integers,
> and other values but not for boolean. Please let me know how to
> update the value for a boolean using Jansson.
>
> Thanks!
>

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[D Panda]

Thank you, Graeme  . This is precisely what I needed. My program now works as expected.