Gfilui

I'm working on a Ubuntu Windows app on my Windows-10 PC, the result of uname -a is the following:

Linux DOMINIQUEDS 4.4.0-17134-Microsoft #48-Microsoft Fri Apr 27 18:06:00 PST 2018 x86_64 x86_64 x86_64 GNU/Linux

I'm doing some C++ development, and I'd like to know which source files (*.cpp or *.h) are including the file Sample.h, so I launched following command:

find ./ -name "*.cpp" -or -name "*.h" -exec grep -i "include" /dev/null ; | grep "Sample.h"

This seems not to be working: only the *.h files, containing include and Sample.h on the same line, are given.

However I know for sure that the -o construction for finding different kinds of files is correct:

find ./ -name "*.cpp" -or -name "*.h"

=> here I get a list of *.cpp and *.h files.

This leaves me with two possibilities:

• Either the behaviour is correct: the -exec parameter is only used on the last find result. In that case, can somebody tell me how I can perform the -exec on all find results?


• Either the behaviour is wrong. In that case, does somebody know if this is a general Ubuntu problem/Windows-10 Ubuntu app problem/... and if any solution can be expected and when?

Thanks in advance

However I know for sure that the -o construction for finding different
kinds of files is correct:

find ./ -name "*.cpp" -or -name "*.h"

True, but the precedence of -or is not that high. From man find:

 Please note that -a when specified implicitly (for example by two tests
 appearing without an explicit operator between them) or explicitly has
 higher precedence than -o. This means that find . -name afile -o -name
 bfile -print will never print afile.

So:

-name "*.cpp" -or -name "*.h" -exec grep ...

Is like:

-name "*.cpp" -or ( -name "*.h" -exec grep ... )

And not like:

( -name "*.cpp" -or -name "*.h" ) -exec grep ...

You need:

find . ( -name '*.cpp' -o -name '*.h' ) -exec grep -H '#include.*Sample.h' +

(I assume you used /dev/null to make grep print the filename? The -H option does that.)

With modern grep, you don't need find at all e.g.

grep -r --include='*.cpp' --include='*.h' 'include' . | grep 'Sample.h'

or - better (given that the order of the search terms is unambiguous)

grep -r --include='*.cpp' --include='*.h' 'include.*Sample.h' .