Converts original charset of the file to UTF-8

charset2utf8.sh

#!/bin/sh
# Converts original charset of the file to UTF-8
# require iconv, tr, grep | sed | awk
# grep wins: https://davidlyness.com/post/the-functional-and-performance-differences-of-sed-awk-and-other-unix-parsing-utilities
# grep -oe'[^=]*$'
# sed 's/[^=]*[=]//g'
# awk -F= '{print$2}'

for arg in "$@"; do
    TMP=".${arg##*/}.$$";
    iconv -f `file -bi $arg | grep -oe'[^=]*$'` -t UTF-8 $arg | tr -d '\r' > $TMP
    mv $TMP $arg;
done