transcode_append_utf8_bom.sh

#!/bin/bash

if [[ $# < 1 ]]
then
	printf "Usage: transcode_append_utf8_bom <FILE>\n"
	exit 1
fi

UTF8_BOM=$(echo "0xef0xbb0xbf" | xxd -r)
FILEHEAD=$(head --bytes=3 $1)
if [ "$FILEHEAD" != "$UTF8_BOM"  ]
then	
	# note will modify fileself
	sed -i '1s/^/\xef\xbb\xbf/' $1
fi

transcode_jis.sh

#!/bin/bash

if [[ $# < 1 ]]
then
	printf "Usage: transcode_jis <FILE>\n"
	exit 1
fi


FILE="$1"

if [ ! -f "$FILE" ]
then
	printf "Error: File '$FILE' Not Found\n"
	exit 2
fi

iconv -f SHIFT-JIS -t UTF-8 -o "$FILE.utf8" "$FILE"
mv "$FILE" "$FILE.delete"
mv "$FILE.utf8" "$FILE"
rm "$FILE.delete"

transcode_remove_utf8_bom.sh

#!/bin/bash

if [[ $# < 1 ]]
then
	printf "Usage: transcode_remove_utf8_bom <FILE>\n"
	exit 1
fi


# note will modify fileself
sed -i '1s/^\xef\xbb\xbf//' $1