Issue

I've got a simple shell script that I almost have working as desired.

Requirements:

Read file names in dir into an array
iterate through the files and append text to the end of a matching line

So far req one is achieved however, I cannot seem to get sed to append properly to a line.

For example here's my script:

#!/bin/bash

shopt -s nullglob
FILES=(/etc/openvpn/TorGuard.*)
TMPFILES=()

if [[ ${#FILES[@]} -ne 0 ]]; then
    echo "####### Files Found #######"
    for file in "${FILES[@]}"; do
        echo "Modifying $file.."
        line=$(grep -n "auth-user-pass" "$file" | cut -d: -f -1)
        array=($(sed -e $line's/$/ creds.txt &/' "$file"))
        tmp="${file/.conf/.ovpn}"
        echo "$tmp created.."
        TMPFILES+=("$tmp")
        printf "%s\n" "${array[@]}" > ${tmp}
    done
fi

Expected output:

....
....
auth-user-pass creds.txt
...
...

Received output:

...
...
auth-user-pass
creds.txt
...
...

Solution

sed can be difficult with special characters. In this case you might use &, what will be replaced by he completed matched string.

for file in "${FILES[@]}"; do
    echo "Modifying ${file}.."
    sed -i 's/.*auth-user-pass.*/& creds.txt/' "${file}"
done

Answered By - Walter A

Answer Checked By - Katrina (WPSolving Volunteer)

Monday, January 31, 2022

[SOLVED] Appending text to end of line with sed - shell script

Issue

Requirements:

Solution