Re: [PATCH 1/2] common/rc: add _require_user_exists() to check if a user exists

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On Thu, Sep 23, 2021 at 11:41:22AM +0100, Luis Henriques wrote:
> Function _require_user() does check if a user exists *and* if it is able
> to execute commands.  Add a new function to simply check if a user exists.
> 
> Signed-off-by: Luis Henriques <lhenriques@xxxxxxx>

Looks like a simple enough hoist.

You /could/ streamline the bash constructs too, but ... fmeh.  This is
easy to review, at least.

Reviewed-by: Darrick J. Wong <djwong@xxxxxxxxxx>

--D

> ---
>  common/rc | 27 ++++++++++++++++++---------
>  1 file changed, 18 insertions(+), 9 deletions(-)
> 
> diff --git a/common/rc b/common/rc
> index 154bc2dd7e94..c7e77c0e26dc 100644
> --- a/common/rc
> +++ b/common/rc
> @@ -2289,18 +2289,27 @@ _cat_group()
>  	cat /etc/group
>  }
>  
> -# check for a user on the machine, fsgqa as default
> +# check if a user exists in the system
> +#
> +_require_user_exists()
> +{
> +	user=$1
> +	_cat_passwd | grep -q $user
> +	[ "$?" == "0" ] || _notrun "$user user not defined."
> +}
> +
> +# check if a user exists and is able to execute commands.
> +# Uses 'fsgqa' user as default.
>  #
>  _require_user()
>  {
> -    qa_user=fsgqa
> -    if [ -n "$1" ];then
> -        qa_user=$1
> -    fi
> -    _cat_passwd | grep -q $qa_user
> -    [ "$?" == "0" ] || _notrun "$qa_user user not defined."
> -    echo /bin/true | su $qa_user
> -    [ "$?" == "0" ] || _notrun "$qa_user cannot execute commands."
> +	qa_user=fsgqa
> +	if [ -n "$1" ];then
> +		qa_user=$1
> +	fi
> +	_require_user_exists $qa_user
> +	echo /bin/true | su $qa_user
> +	[ "$?" == "0" ] || _notrun "$qa_user cannot execute commands."
>  }
>  
>  # check for a chown support



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