Bash: Correct way to store result of command in array [duplicate] - bash

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This question already has answers here:
How can I store the "find" command results as an array in Bash
(8 answers)
Closed 4 years ago.
How do I put the result of find $1 into an array?
In for loop:
for /f "delims=/" %%G in ('find $1') do %%G | cut -d\/ -f6-

Answer 1

I want to cry.
In bash:
file_list=()
while IFS= read -d $'\0' -r file ; do
file_list=("${file_list[#]}" "$file")
done < <(find "$1" -print0)
echo "${file_list[#]}"
file_list is now an array containing the results of find "$1
What's special about "field 6"? It's not clear what you were attempting to do with your cut command.
Do you want to cut each file after the 6th directory?
for file in "${file_list[#]}" ; do
echo "$file" | cut -d/ -f6-
done
But why "field 6"? Can I presume that you actually want to return just the last element of the path?
for file in "${file_list[#]}" ; do
echo "${file##*/}"
done
Or even
echo "${file_list[#]##*/}"
Which will give you the last path element for each path in the array. You could even do something with the result
for file in "${file_list[#]##*/}" ; do
echo "$file"
done
Explanation of the bash program elements:
(One should probably use the builtin readarray instead)
find "$1" -print0
Find stuff and 'print the full file name on the standard output, followed by a null character'. This is important as we will split that output by the null character later.
<(find "$1" -print0)
"Process Substitution" : The output of the find subprocess is read in via a FIFO (i.e. the output of the find subprocess behaves like a file here)
while ...
done < <(find "$1" -print0)
The output of the find subprocess is read by the while command via <
IFS= read -d $'\0' -r file
This is the while condition:
read
Read one line of input (from the find command). Returnvalue of read is 0 unless EOF is encountered, at which point while exits.
-d $'\0'
...taking as delimiter the null character (see QUOTING in bash manpage). Which is done because we used the null character using -print0 earlier.
-r
backslash is not considered an escape character as it may be part of the filename
file
Result (first word actually, which is unique here) is put into variable file
IFS=
The command is run with IFS, the special variable which contains the characters on which read splits input into words unset. Because we don't want to split.
And inside the loop:
file_list=("${file_list[#]}" "$file")
Inside the loop, the file_list array is just grown by $file, suitably quoted.

Answer 2

arrayname=( $(find $1) )
I don't understand your loop question? If you look how to work with that array then in bash you can loop through all array elements like this:
for element in $(seq 0 $((${#arrayname[#]} - 1)))
do
echo "${arrayname[$element]}"
done

Answer 3

This is probably not 100% foolproof, but it will probably work 99% of the time (I used the GNU utilities; the BSD utilities won't work without modifications; also, this was done using an ext4 filesystem):
declare -a BASH_ARRAY_VARIABLE=$(find <path> <other options> -print0 | sed -e 's/\x0$//' | awk -F'\0' 'BEGIN { printf "("; } { for (i = 1; i <= NF; i++) { printf "%c"gensub(/"/, "\\\\\"", "g", $i)"%c ", 34, 34; } } END { printf ")"; }')
Then you would iterate over it like so:
for FIND_PATH in "${BASH_ARRAY_VARIABLE[#]}"; do echo "$FIND_PATH"; done
Make sure to enclose $FIND_PATH inside double-quotes when working with the path.

Answer 4

Here's a simpler pipeless version, based on the version of user2618594
declare -a names=$(echo "("; find <path> <other options> -printf '"%p" '; echo ")")
for nm in "${names[#]}"
do
echo "$nm"
done

Answer 5

To loop through a find, you can simply use find:
for file in "`find "$1"`"; do
echo "$file" | cut -d/ -f6-
done
It was what I got from your question.