Re: [tarantool-patches] [PATCH v2 1/2] Refactoring in string validation of log parameters

[Vladimir Davydov <vdavydov.dev@gmail.com>]

On Thu, Jul 19, 2018 at 01:54:48PM +0300, Olga Arkhangelskaia wrote:
> Removed unnecessary double check of log configuration string.
> Instead all log configuration checks were moved to separate function.
> ---
> Branch: https://github.com/tarantool/tarantool/tree/OKriw/refactor-log-cfg
> 
> v1:
> https://www.freelists.org/post/tarantool-patches/PATCH-Refactoring-in-string-validation-of-log-parametrs
> 
> Changes in v2:
> - exceptions transfered to box.cc
> - say_parse_logger_type traansfered to say_ckeck_cfg
> 
> 
>  src/box/box.cc | 40 ++++++++--------------------------------
>  src/say.c      | 34 +++++++++++++++++++++++++---------
>  src/say.h      |  8 ++++----
>  3 files changed, 37 insertions(+), 45 deletions(-)
> 
> diff --git a/src/box/box.cc b/src/box/box.cc
> index 7c6312d78..db598957a 100644
> --- a/src/box/box.cc
> +++ b/src/box/box.cc
> @@ -356,41 +356,17 @@ box_check_say()
>  	const char *log = cfg_gets("log");
>  	if (log == NULL)
>  		return;
> -	enum say_logger_type type;
> -	if (say_parse_logger_type(&log, &type) < 0) {
> -		tnt_raise(ClientError, ER_CFG, "log",
> -			  diag_last_error(diag_get())->errmsg);
> -	}
> -
> -	if (say_check_init_str(log) == -1) {
> -
> -		diag_raise();
> -	}
> -
> -	if (type == SAY_LOGGER_SYSLOG) {
> -		struct say_syslog_opts opts;
> -		if (say_parse_syslog_opts(log, &opts) < 0) {
> -			if (diag_last_error(diag_get())->type ==
> -			    &type_IllegalParams) {
> -				tnt_raise(ClientError, ER_CFG, "log",
> -					  diag_last_error(diag_get())->errmsg);
> -			}
> -		}
> -		say_free_syslog_opts(&opts);
> -		diag_raise();
> -	}
>  
>  	const char *log_format = cfg_gets("log_format");
> -	enum say_format format = say_format_by_name(log_format);
> -	if (format == say_format_MAX)
> -		diag_set(ClientError, ER_CFG, "log_format",
> -			 "expected 'plain' or 'json'");
> -	if (type == SAY_LOGGER_SYSLOG && format == SF_JSON) {
> -		tnt_raise(ClientError, ER_ILLEGAL_PARAMS, "log, log_format");
> -	}
>  	int log_nonblock = cfg_getb("log_nonblock");
> -	if (log_nonblock == 1 && type == SAY_LOGGER_FILE) {
> -		tnt_raise(ClientError, ER_ILLEGAL_PARAMS, "log, log_nonblock");
> +	if (say_check_cfg(log, log_format, log_nonblock) < 0) {
> +		if (diag_last_error(diag_get())->type ==
> +		    &type_IllegalParams) {
> +			tnt_raise(ClientError, ER_CFG,
> +				  "log, log_format or log_nonblock",
> +				  diag_last_error(diag_get())->errmsg);

Hmm, no - an error message produced by this code doesn't look neat,
nor informative:

  Incorrect value for option 'log, log_format or log_nonblock': Illegal parametrs log, log_nonblock

I guess, I see now why all these checks sit in box.cc instead of being
isolated in say.c - for the sake of error reporting. Sorry I confused
you :-( If you don't have a better idea in mind, let's return to where
we started, i.e. to removal of say_check_init_str(). Since it's not
going to be used after you remove the call to it from box_check_say(),
please remove it from say.[hc] as well.