Counting Files by Types

I use awk () a lot. One of my favorite features of awk is its associative arrays. This means awk can use anything as an index into an array. In the next example, I use the output of the file () command as the index into an array to count how many files there are of each type:

 ${*-.} xargs 

#!/bin/sh # usage: count_types [directory ...] # Counts how many files there are of each type # Original by Bruce Barnett # Updated version by yu@math.duke.edu (Yunliang Yu) find ${*-.} -type f -print | xargs file | awk '{ $1=NULL; t[$0]++;
}
END {
 for (i in t) printf("%d\t%s\n", t[i], i);
}
' | sort -nr # Sort the result numerically, in reverse

The output of this might look like:

ascii text 32 English text 20 c program text 17 sparc executable not stripped 12 compressed data block compressed 16 bits 8 executable shell script 1 sparc demand paged dynamically linked executable 1 executable /bin/make script

- BB