shell脚本练习（查询某目录下的所有文本文件的个数，和行数）

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#!/bin/bash

if [ $# -lt 1 ];then
  echo "at least one path."
  exit 1
fi

if ! [ -e "$1" ];then
  echo "file does not exist"
  exit 2
elif ! [ -d "$1" ];then
  echo "file is not directory"
  exit 3
else
  fileCount=0;
  lineCount=0;
  for i in $1/*;do
      if echo "$(file $i)"|grep "ASCII text" &>/dev/null;then
         fileCount=$[$fileCount+1]
         lineCount=$[$lineCount + $(cat $i|wc -l)]
      fi
  done
  echo "text file count :$fileCount"
  echo "text lien count:$lineCount"
fi