On 7 January 2016 at 03:29, Yi Zhao <yi.zhao@windriver.com> wrote:

Sometimes the grep output is not correct if the log message contains
some special characters. Use re.escape to escape all non-alphanumerics
before grep

If we're going to insist that the strings are literal then instead of telling grep to use extended regexp's and passing escaped regexs, why not just use -F which tells grep to search for fixed strings, not expressions.