脚本中的权限问题，

#!/bin/bash  

function changename()
{
   
   if [ -z $2 ];then
      echo "lack function parameter "
      return -1
   fi
   mv -f $1 $2
   return 0  
}
function change()
{
   ofileName= # old file name
   nfileName= #new file name
   ls -l > a.txt
  index=0
  while read line
  do
    index=`expr ${index} + 1`
    if [ ${index} -eq 1 ] ; then
        continue;  # ignore the first line of 'ls -l'
fi
    a=($line)
    #echo ${a[8]}       the 9th element of array is file name
    #echo ${a[3]}                  # the 3rd element of array is owner name    
    ofileName=${a[8]}
    pos=`expr index ${ofileName} "."`  # pos = the . position in file name
    if [ ${pos} -eq 0 ] ; then  # if no . in file name then nfileName=oldName+[+owner+]
        nfileName="${ofileName}[${a[3]}]"
    else  
        owner="[${a[3]}]."
        nfileName="${a[8]/./${owner}} "  # substitute the . character to the "[owner]."
    fi  
    echo "nfilename=${nfileName}"
    changename ${ofileName} ${nfileName} #call function changename to change file name to new file name
  done<a.txt
}


change
ls -l
echo "changed successfully"