How to generate list of directories and execute actions for each item in the list?

Question

How to generate list of directories and execute actions for each item in the list?

Navigation

#1 by (0 votes)

1

I'm trying to build a Shell Script that stores the directories that exist in the / Volumes root and perform an iteration over these, ignoring only the directory: "Preboot" and "Macintosh H"

bash

asked by anonymous 30.09.2017 / 00:10

1 answer

Viewing colors in Notepad ++ Engagement system users [closed]

score 0 · Accepted Answer

Quick response

for d in /Volumes/*; do
  if [ "$d" != "/Volumes/Preboot" -a "$d" != "/Volumes/Macintosh H" ]; then
    itera "$d";
  fi;
done

Explanation

for will iterate over a set of given words. In this case, we are passing /Volumes/* , which will be subjected to a glob expansion, and therefore the iteration argument of for will be all non hidden content of /Volumes .

In condition, I am making sure that the $d variable is neither the Preboot folder within /Volumes nor Macintosh H within /Volumes as well. I can not remember any membership operations in test . You could have used case/esac also to ignore these options.

The test cmd1 -a cmd2 , in particular -a , is the and operation of the test command. By way of example, the example operation at the beginning of this paragraph is true if cmd1 and cmd2 are true.

Disclaimer

As I am without a computer, I was in doubt when the glob expansion generates options with spaces in the middle, but I believe that even if this generates a bug in the code, it is almost trivial to fix it.