在 2016年01月07日 20:21, Burton, Ross 写道:
On 7 January 2016 at 03:29, Yi Zhao <[email protected]
<mailto:[email protected]>> 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.
Hi Ross,
It still need to escape quotation marks if using -F option.
Consider the following log:
[521514.737] (EE) evdev: Qemu Tablet: Unable to open evdev device
"/dev/input/touchscreen0".
We still need an extra step to replace " with \" before grep
Yi
Ross
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