convert a text file or all files under a directory to UTF-8 using nkf

conv2utf8

#!/bin/sh

opt='-w'
# lower case -> output / UPPER CASE -> input
#  -J  ISO-2022-JP (JIS code)
#  -S  Shift_JIS
#  -E  EUC-JP
#  -W  UTF-8

[ $# -eq 0 ] && echo "Usage: `basename $0` <filename | dirname>" \
             && exit 1

self="$0"
if [ -f "$@" ]; then
    # [ $(nkf -g "$@") = 'Shift_JIS' ] && \ # only convert specific encoding
    nkf --in-place $opt "$@"
    echo "converted $@"
elif [ -d "$@" ]; then
    # given directory, convert all files recursively
    find "$@" -type f -print0 | xargs -0 -n1 $self
else
    echo "$@: No such file or directory"
    exit 1
fi