[PATCH] devtools: forbid writing to standard output streams

[Stephen Hemminger]

On Thu, 21 Dec 2023 14:31:20 +0100
David Marchand <david.marchand at redhat.com> wrote:

> No output on stdout or stderr!
> Drivers and libraries must use the logging framework.
> 
> Signed-off-by: David Marchand <david.marchand at redhat.com>
> ---
>  devtools/checkpatches.sh | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/devtools/checkpatches.sh b/devtools/checkpatches.sh
> index 10d1bf490b..c9e466f736 100755
> --- a/devtools/checkpatches.sh
> +++ b/devtools/checkpatches.sh
> @@ -61,6 +61,14 @@ check_forbidden_additions() { # <patch>
>  		-f $(dirname $(readlink -f $0))/check-forbidden-tokens.awk \
>  		"$1" || res=1
>  
> +	# no output on stdout or stderr
> +	awk -v FOLDERS="lib drivers" \
> +		-v EXPRESSIONS="\\\<printf\\\> \\\<fprintf\\\(stdout, \\\<fprintf\\\(stderr," \
> +		-v RET_ON_FAIL=1 \
> +		-v MESSAGE='Writing to stdout or stderr' \
> +		-f $(dirname $(readlink -f $0))/check-forbidden-tokens.awk \
> +		"$1" || res=1
> +
>  	# refrain from new additions of rte_panic() and rte_exit()
>  	# multiple folders and expressions are separated by spaces
>  	awk -v FOLDERS="lib drivers" \


Ok, noticed a lot of this in the crypto drivers dump code.
Probably other drivers have buried debug code as well.