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Re: Nulls in scalar parameters

X-seq: zsh-workers 50802
From: Roman Perepelitsa <roman.perepelitsa@xxxxxxxxx>
To: Clinton Bunch <cdb_zsh@xxxxxxxxxxx>
Cc: "zsh-workers@xxxxxxx" <zsh-workers@xxxxxxx>
Subject: Re: Nulls in scalar parameters
Date: Fri, 21 Oct 2022 12:33:51 +0200
Archived-at: <https://zsh.org/workers/50802>
In-reply-to: <cc0b034e-056d-3da6-e69b-55b447a6c235@zentaur.org>
List-id: <zsh-workers.zsh.org>
References: <cc0b034e-056d-3da6-e69b-55b447a6c235@zentaur.org>

On Fri, Oct 21, 2022 at 6:51 AM Clinton Bunch <cdb_zsh@xxxxxxxxxxx> wrote:
>
> I'm working on a zsh/random module and I'm creating a builtin that
> returns a user-specified number of random bytes and either prints it or
> returns it in a parameter.  There exists a small possibility of embedded
> nulls in the output, and I'm not sure how to handle setting such a value
> in a parameter.

This is how bin_sysread does it in system.c.

    setsparam(outvar, metafy(inbuf, count, META_DUP));

`outvar` points to the name of the parameter (e.g., "REPLY"). `inbuf`
points data and `count` is the number of bytes in it.

Roman.

References:
- Nulls in scalar parameters
  - From: Clinton Bunch

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