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Full Discussion: How to form a correct syntax to sift out according to complementary patterns with 'find'?
Top Forums UNIX for Beginners Questions & Answers How to form a correct syntax to sift out according to complementary patterns with 'find'? Post 303011143 by drysdalk on Saturday 13th of January 2018 07:50:35 PM
Old 01-13-2018
Hi,

I think this might be time to break out the -prune flag to find, perhaps. It can be used to exclude from your results all things that match a particular criteria.

So, an example. I created a sort-of-similar directory tree to yours, with one single test file containing the text "FOO" copied to all directories.

So a simple find with an appropriate -exec returns this:

Code:
$ find . -type f -exec grep -l FOO \{\} \;
./Users/myuser/Library/browser3/test
./Users/myuser/Library/Stuff/test
./Users/myuser/Library/Things/test
./Users/myuser/Library/browser2/test
./Users/myuser/Library/browser1/test
$

So far, so normal. But now here's what happens if I use prune to exclude directories that match the pattern browser?:

Code:
$ find . -type d -name 'browser?' -prune -o -type f -exec grep -l FOO \{\} \;
./Users/myuser/Library/Stuff/test
./Users/myuser/Library/Things/test
$

The files underneath browser1, browser2 and browser3 were ignored, because even though they themselves matched we'd removed all directories whose name matched the pattern 'browser?' from consideration.

The basic syntax for prune is you set up your conditions first for what you want to exclude (so -type d -name 'browser?' in this case), and then after the -prune -o you put the conditions for what you actually want to match once what's being pruned is excluded.

Hope this helps.
 

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tcl_stringcasematch

Tcl_StringMatch(3)					      Tcl Library Procedures						Tcl_StringMatch(3)

__________________________________________________________________________________________________________________________________________________

NAME

       Tcl_StringMatch, Tcl_StringCaseMatch - test whether a string matches a pattern

SYNOPSIS

       #include <tcl.h>

       int
       Tcl_StringMatch(str, pattern)

       int
       Tcl_StringCaseMatch(str, pattern, flags)

ARGUMENTS

       const char *str (in)		 String to test.

       const char *pattern (in) 	 Pattern to match against string.  May contain special characters from the set *?[].

       int flags (in)			 OR-ed combination of match flags, currently only TCL_MATCH_NOCASE.  0 specifies a case-sensitive search.
_________________________________________________________________

DESCRIPTION

       This  utility  procedure  determines  whether  a  string  matches  a given pattern.  If it does, then Tcl_StringMatch returns 1.  Otherwise
       Tcl_StringMatch returns 0.  The algorithm used for matching is the same algorithm used in the string match Tcl command and  is  similar	to
       the algorithm used by the C-shell for file name matching;  see the Tcl manual entry for details.

       In  Tcl_StringCaseMatch,  the algorithm is the same, but you have the option to make the matching case-insensitive.  If you choose this (by
       passing TCL_MATCH_NOCASE), then the string and pattern are essentially matched in the lower case.

KEYWORDS

       match, pattern, string

Tcl									8.5							Tcl_StringMatch(3)
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