Re: [PATCH v5] staging: wlan-ng: replace strncpy() with strscpy()

From: Dan Carpenter
Date: Fri Oct 13 2023 - 06:44:58 EST


On Fri, Oct 13, 2023 at 01:21:21PM +0300, Calvince Otieno wrote:
> Checkpatch suggests the use of strscpy() instead of strncpy().
> The advantages are that it always adds a NUL terminator and it prevents
> a read overflow if the src string is not properly terminated. One
> potential disadvantage is that it doesn't zero pad the string like
> strncpy() does.
>
> In this code, strscpy() and strncpy() are equivalent and it does not
> affect runtime behavior. The string is zeroed on the line before
> using memset(). The resulting string was always NUL terminated and
> PRISM2_USB_FWFILE is string literal "prism2_ru.fw" so it's NUL
> terminated.
>
> However, even though using strscpy() does not fix any bugs, it's
> still nicer and makes checkpatch happy.
>
> Signed-off-by: Calvince Otieno <calvncce@xxxxxxxxx>
> ---
> Patch version v5:
> Removed v1 patch details from the revsion history

This patch doesn't apply correctly. It has been white space damaged
for some reason. Tabs replaced with spaces. Read
Documentation/process/email-clients.rst. Hopefully the first paragraph
convinces you to just use git to send patchs and you can skip the rest
of the document.

I try to catch these sorts of mistakes earlier instead of making you
send a v6 but I thought the issue was the v1. Sorry about that. The
good news is that now you can delete the extra space character Julia
mentioned.

regards,
dan carpenter