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1

How to store file information into an array?

rated 0 times [ 1] [ 0] / answers: 1 / hits: 1673 / 2 Years ago, sat, july 9, 2022, 1:22:58

With this part of script I can get a necessary information about files in my directory(and subdirectories). The only information I need is the extension and the size of file.

for file in `find . -type f`; do

   size=$(stat -c '%s' ${file})

   file=$(echo "${file}" | awk -F/ '{print $NF}')

   ext=$(echo "${file}" | grep '..*.' | awk -F. '{print $NF}' | grep '[A-Za-z0-9]')

if [ -z ${ext} ]; then

   echo "NOTE: no extention"

else

   EXTS="${EXTS}${ext}${newLine}"

It is only part of the script. So my question is: How can I put this informarion into an array? I mean I want an array with elements to look like this:

 c/123 /12 h/90 /0 txt/0

where c, h and txt are file extension and 123, 12 and 0 are file sizes. So lately I can separately work with sizes and extensions

I hope, I've neatly put my question down. Sorry for mistakes. :)

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otputler

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2 Years ago

answered 2 Years ago utschang · Accepted Answer

First, don't do for file in $(find …). That's very fragile.

Now, you can simplify your code a bit by getting find to print the filenames and sizes together, using -printf:

find . -type f -printf '%s.%f/'

Then, you can use awk to process this output to get cumulative sizes by extension. Note that I used . to separate the filename (%f) from the size (%s), and I added a / after that. Hence, I can use . as a field separator in awk. And since the only characters not allowed in filenames are / and the ASCII NUL, I can safely use / as the record separator.

So:

awk -F. -v RS=/ 'NF > 2 {size[$NF] += $1; next}

  {size["/"] += $1}

END {for (i in size) {print i,"/",size[i]}'

Here, I'm using / as the index if there's no extension.

Combined:

$ find . -type f -printf '%s.%f/' | awk -F. -v RS=/ 'NF > 2 {size[$NF] += $1; next}

{size["/"] += $1}

END {for (i in size) {printf "%s/%d

", i, size[i]}}'

h/780

md/2509

tex/23961

c/13557

//5109

txt/2349291

sh/1166

py/12248

Now, if your extensions don't contain spaces, you could just do:

my_array=( $(find . -type f -printf '%s.%f/' | awk -F. -v RS=/ 'NF > 2 {size[$NF] += $1; next} {size["/"] += $1} END {for (i in size) {printf "%s/%d

", i, size[i]}}') )

Or, you can use process substitution and read each entry in:

my_arr=()

while IFS='' read -r entry

do

    my_arr+=( "$entry" )

done < <(find . -type f -printf '%s.%f/' | awk -F. -v RS=/ 'NF > 2 {size[$NF] += $1; next} {size["/"] += $1} END {for (i in size) {printf "%s/%d

", i, size[i]}}')

As before:

$ printf "%s

" "${my_arr[@]}"

h/780

md/2509

tex/23961

c/13557

//5109

txt/2349291

sh/1166

py/12248