common,tools: make sure the destination buffer can handle the size of the string

common,tools: make sure the destination buffer can handle the size of the string

fix klocwork issues:
Width is not specified for 's' conversion specifier.
This can result in an overflow of the buffer
provided in argument 3 of a call to 'sscanf'

Signed-off-by: songweibin <song.weibin@zte.com.cn>
(cherry picked from commit 5e8c412e63d6a86aa4846efe4cceff52ca8f16d5)