Is free(NULL) OK?

[Joel Sherrill]

POSIX says free(NULL) is valid and no action.

https://pubs.opengroup.org/onlinepubs/009695399/functions/free.html

--joel

On Sun, Jan 12, 2025, 12:46 AM Hal Murray via devel <devel at ntpsec.org>
wrote:

>
> The Linux man page says
>        If ptr is NULL, no operation is performed.
>
> I'd expect a wrapper if there really was a problem.
>
> This code is in ntpd/ntp_config.c
>         if (NULL == s) {                        /* free() hates NULL */
>                 s = estrdup("");
>         }
>
> Any reason not to nuke that chunk of code?
>
>
> --
> These are my opinions.  I hate spam.
>
>
>
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