How to grep -E for this?

kenw232 · 10-06-2018, 02:52 PM

I am trying to grep for ${"\x47 in this string on the command line with find.

Code:

global $icf9;$icf9 = $GLOBALS;${"\x47\x4c\...

This will partially work but I can't add the ${ before it. I've tried everything.

Code:

find . -name "*.php" -exec grep -HEsi """\x47" {} \;

Anyone have an idea?

scasey · 10-06-2018, 04:24 PM

It would help if you showed us what you've tried, and the results of those attempts. Your implicit "doesn't work" isn't helpful

Absent your sharing: escape them

Code:

\$\{

(untested)

kenw232 · 10-06-2018, 04:28 PM

I tried my example only (find . -name "*.php" -exec grep -HEsi """\x47" {} \

which works but I need to add the ${ before it. whenever I do that it finds nothing. I have tried what you said and it does not work either (finds nothing). To be clear the files I'm searching have that top line of text in my OP. I want to grep for it with this now:

find . -name "*.php" -exec grep -HEsi "\$\{""\x47" {} \;

it should find it and it doesn't.

scasey · 10-06-2018, 05:32 PM

Please use code tags when posting code or results...they prevent the spurious smileys, among other things.
Does

Code:

find . -name "*.php" -exec grep -HEsi """\x47" {} \;

return other lines than what you're wanting to match?

I think the problem is using quote delimiters and having a quote in the pattern.
Using single quotes works.
Note that it was necessary to also escape the \. Without that, the \x just meant x, so there was no match to the \ character

Code:

find . -name "*.php" -exec grep -HEsi '\$\{"\\x47';

kenw232 · 10-06-2018, 07:01 PM

thanks, that seems to work better.

scasey · 10-06-2018, 07:48 PM

You're welcome.
Mastering regex often involves a lot of trial and error.

You can mark the thread Solved, if you feel it is.

individual · 10-06-2018, 10:12 PM

Here's a tip: you don't need -E because your pattern is fixed. Rather than use -E and then have to escape the meta characters ($, {, \), use the -F flag, which means "fixed pattern."

Code:

grep -F '${\x47'

Much easier to read, isn't it?

ondoho · 10-07-2018, 03:16 AM

you are grepping for a fixed string, yes?
it's not a regular expression?
so why use -E?
wouldn't -F be better?

Code:

grep -F '${"\x47' ...

edit: ooooops, the previous poster wrote exactly the same

scasey · 10-07-2018, 04:05 AM

One more: -H specifies the default...