CODEWITHSUNDEEP
bashshell
Harley Jones
Harley Jones

Reputation: 167

Bash script to read a file from the command line with list of files

I need to write a bash script that will take in input (a file) from the command line which contains a list of files inside. I then need to open those files inside the file and read it word by word keeping a count of the occurrences of each word in all the files in the list. So far it is printing out the list of files inside the file, but also the file itself. This is what I have so far. I am new to bash scripts so I am not sure how to do this. I appreciate any help. Thanks

    #!/bin/bash

    wordArray=()
    countArray=()
    INPUT="$1";

    if [ -f "$INPUT" ]
    then
       find $name -type f
       echo "$name";
    else
       echo "$INPUT is not a file!";
    fi

Upvotes: 0

Views: 443

Answers (3)

clt60
clt60

Reputation: 63892

To count the occurences of all words in all files from the list in one file, you can use:

xargs grep -hoP '\b\w+\b' < file_with_list | sort | uniq -c

Example:

file list.txt

test1.txt
test2.txt

test1.txt

hello world

test2.txt

hello word hello again

running:

xargs grep -hoP '\b\w+\b' < list.txt | sort | uniq -c

prints

   1 again
   3 hello
   2 word

Caveats:

  • the filenames in the list.txt can't contain spaces...

Upvotes: 2

clt60
clt60

Reputation: 63892

Try:

#!/bin/bash

err() { echo "$@" >&2; return 1; }

printwords() {
    echo "Wordcounts in the: $@"
    for i in "${!words[@]}"
    do
        echo "$i => ${words[$i]}"
    done
}

input="$1"
[[ -n $input ]] || err "Usage: $0 filename" || exit 1
[[ -f $input ]] || err "File $input doesn't exists" || exit 2

declare -A words
while read -r file
do
    while read -r word
    do
        let words[$word]++
    done < <(grep -oP '\b\w+\b' "$file")
done < "$input"

printwords "$(cat "$input" | xargs)"

Upvotes: 0

vlp
vlp

Reputation: 603

I think you are looking for something like this instead of find.

for name in $INPUT; do echo $name; done

this will print all files in your $INPUT file, of course you can do anything else in that loop.

Upvotes: -1

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