shell实现字符编码转换工具分享

#!/bin/bash

: << mark
转码工具，支持utf-8转gbk和gbk转utf-8
孔令飞@2012-05-07
mark

#set -x

scode="gbk"
dcode="utf-8"

function usage()
{
 cat << eof
usage: conv [options] [dir]
[-u] gbk to utf-8
[-g] utf-8 to gbk
eof
 exit 1
}

#将当前目录下所有普通文件进行转码 gbk to utf-8
function g2u()
{
 local dir=$1
 printf "convering $dir ......"
 for file in $(ls $dir)
 do
  file="$dir/$file"
  if [ -f $file ];then

   coding=$(file -b $file | cut -d ' ' -f1)

   #进行转码
   if [ "$coding" = "iso-8859" ];then
    local tmpfile=$(mktemp)
    fright=$(stat -c %a $file)
    fuser=$(stat -c %u $file)
    fgro=$(stat -c %g $file)
    iconv -f $scode -t $dcode $file > $tmpfile || usage
    mv $tmpfile $file &&
    chmod $fright $file
    chown $fuser:$fgrp $file
   fi
  fi
 done
 printf "      done\n"
}

function u2g()
{
 local dir=$1
 printf "convering $dir ......"
 for file in $(ls $dir)
 do
  file="$dir/$file"
  if [ -f $file ];then

   coding=$(file -b $file |cut -d ' ' -f1)

   #进行转码
   if [ "$coding" = "utf-8" ];then
    local tmpfile=$(mktemp)
    fright=$(stat -c %a $file)
    fuser=$(stat -c %u $file)
    fgro=$(stat -c %g $file)
    iconv -f $dcode -t $scode $file > $tmpfile || usage
    mv $tmpfile $file &&
    chmod $fright $file
    chown $fuser:$fgrp $file
   fi
  fi
 done
 printf "      done\n"
}

[ $# -ne 2 ] && usage

while getopts ug opt
do
 case $opt in
  u) echo "convert gbk coding to utf-8 ...."
  for dir in $(find $2 -type d)
  do
   g2u $dir
  done

  g) echo "convert utf-8 coding to gbk ...."
  for dir in $(find $2 -type d)
  do
   u2g $dir
  done

  *) usage
  exit 1

 esac
done

exit 0