Hello Assaf.
Thank you Assaf and Eric for your suggestions. I will also look at the
tool “pcregrep”.
--------------------------------------------------------------------------------
Thank you Eric for having answered the question of the subject:
Le 15/09/2018 à 22:27, Eric Blake a écrit :
On 9/15/18 12:57 PM, 21na...@gmail.com wrote:
So it is possible to find “\x0A\x00” alone, but for example
“\x74\x00\x0D\x00\x0A\x00\x74\x00\x65\00” is impossible to find with
the “-P” option?
Correct. It is impossible to find the record terminator in the middle
of a pattern, whether that terminator is \n (default) or NUL (-z). It
is therefore impossible to find a multi-record match using grep. The
string you listed contains both \x00 and \x0a, so regardless of which
of those two bytes you pick as the record terminator, it is impossible
to use grep to find that substring in your file. You'll have to
resort to a tool that supports multiline matching, since grep is not
such a tool.
