I'm trying to get every single character of every single line in a given file and then do convertnum() (Assume that the function works perfectly) on each single character. Here is what I have so far:
#!/bin/bash
file1=$1
while read -r line
do
//I want to iterate over each "line" and then do convertnum "char" on every single character within the line but I don't know how to do it.
done
done < "$file1"
I believe the first answer is not quite right:
Here is the updated script:
#!/usr/bin/env bash
file1=$1
while IFS= read -r line; do
for (( i=0; i<${#line}; i++ )); do
char="${line:$i:1}"
echo $(convertnum "$char")
done
done < "$file1"
{var} is used so the default 0 is not. Also just in case convert consumes stdin fd 0{varname} under redirecion , LESS='+/^REDIRECTION' man bashMaybe something like this:
#!/usr/bin/env bash
file1=$1
while IFS= read -ru "$fd" -d '' -N1 char; do
echo convertnum "$char"
done {fd}< <(tr -s '[:space:]' '\0' < "$file1")
echo to actually run convertnum against each char.
xxd?convertnumis just a simple replacement function, you don't really need to access the entire file at once. If you need access to all the previous and subsequent lines, you can similarly read the entire file into an array.lineis a string, so use string processing functions.for (( i = 0; i < ${#line}; i++ )); do convertnum "${line:i:1}"; done