Loop through folders

Erichg2013 · 02-11-2017, 01:55 PM

Hi everyone,

I have around 40 folder where I want to be able to loop through them and perform some calculations to each file in each of the folders. Do you know of a way to that when I have the main folder (with the 40 folders) as current directory?

Any help will be much appreciated.

Best,

Eric

Turbocapitalist · 02-11-2017, 02:06 PM

Welcome.

There are several ways. See find and shopt -s globstar for two examples: http://mywiki.wooledge.org/BashFAQ/030#Recursively

Can you go into more detail about the actions you wish to perform in each folder?

nodir · 02-11-2017, 04:55 PM

Code:

#!/bin/sh

for dir in ./*; do
  if [ -d "$dir" ]; then
    for file  in "$dir"/*; do
      if [ -f "$file" ]; then
       printf "do something with %s\n" "$file"
      fi
    done
  fi
done

A bit twisted, for my taste. The mentioned find and the given link are probably more clear. I used file as a varname to make it clear what is a file and what a folder, else i avoid such.
To put it short: it is a proposal, not well tested and not much thoughts on drawbacks of it.

ondoho · 02-11-2017, 05:02 PM

find is the appropriate tool. look at the '-exec' option, amongst others:

Code:

man find