[LTP] [PATCH] syscalls/syslog: mitigate reading syslog issue in multiple files

[Cyril Hrubis <chrubis@suse.cz>]

Hi!
> diff --git a/testcases/kernel/syscalls/syslog/syslog-lib.sh b/testcases/kernel/syscalls/syslog/syslog-lib.sh
> index e166d3a..3afd80f 100755
> --- a/testcases/kernel/syscalls/syslog/syslog-lib.sh
> +++ b/testcases/kernel/syscalls/syslog/syslog-lib.sh
> @@ -151,6 +151,37 @@ restart_syslog_daemon()
>  	fi
>  }
>  
> +check_syslog_content()
> +{
> +	logfile=$1
> +	newvalue_getter=$2
> +	oldvalue_getter=$3

The oldvalue seems to be constant, at least I haven't noticed any
different getter than 'echo $value', why don't we pass it as constant
instead?

> +	cond=$4
> +	attempts=$5

The 'attempts' value seems to be 25 in all cases, why do we pass it as a
parameter in the first place.

> +	for i in `seq 1 $attempts`;
> +	do
> +		tst_resm TINFO "reading $logfile, attempt $i"
> +
> +		if [ $(( `eval $newvalue_getter` - `eval $oldvalue_getter` )) $cond ]; then
> +			return 0

What about returning the difference instead of passing the $cond to this
fucntion, then we could do something as:

	res=check_syslog_content "$LOG" "$getter" "$oldval"
	if [ $res -ge 1 ]; then
		tst_resm TPASS ...
	else
		tst_resm TFAIL ...

> +		fi
> +		sleep 1

Can we shorten the sleep (use tst_sleep with subsecond interval) and
increase number of attempts accordingly?

> +	done
> +
> +	tst_resm TFAIL "expected line is not in syslog - giving up."
> +	get_info_on_fail "$logfile"
> +	return 1
> +}
> +
> +get_info_on_fail()
> +{
> +	status_daemon systemd-journald

We should first check that systemd-journal is even installed, possibly
with command  if systemd-journal is a binary that is present in one of
the directories in $PATH.

> +	status_daemon rsyslog

This should use $SYSLOG_DAEMON instead of rsyslog.

> +	cat $1
> +	set -x
> +}
> +

-- 
Cyril Hrubis
chrubis@suse.cz