chname

一个linux下shell编程示例

#!/bin/bash
# change file's name
# karlno 20080928

function man
{
	echo "Usage: chname -c|-n|-d|-a path old_name [new_name]"
	echo "option function"
	echo " -c    replace old suffix by new one"
	echo " -n    replace the string of filename by new one"
	echo " -d    delete the string from the filename"
	echo " -a    add the suffix to all files"
	echo " -h    help"
	echo "make by karlno"
}

if [ "$0" != "chname" ]; then					#check the program name
 exit 1
fi

if [ "$#" = 0 ]; then									#check the arg number
 man
 exit 1
fi

if [ "$1" = "-c" ] || [ "$1" = "-n" ] || [ "$1" = "-d" ] || [ "$1" = "-a" ]; then
	if [ "$2" ] && [ -d "$2" ]; then		#check and open the path
	 cd $2
	elif [ ! "$2" ]; then
	 echo "Please input path!"
	 exit 1
	else
	 echo "Not found this path:\"$2\"!"	#the path not exist
	 exit 1
	fi
fi

case $1 in														#option
-c)																		#eg.change ***.abc to ***.abb
 if [ "$3" ] && [ "$4" ]; then				#check arg
  for filename in *.$3
  do
   mv "$filename" "${filename/.$3/.$4}"
  done   
 else
  echo "arg3 or arg4 err!"
  exit 1
 fi
 ;;
 
-n)																		#eg.change **abc** to **abb**
 if [ "$3" ]; then										#check arg
  for filename in *$3*
  do
   mv "$filename" "${filename/$3/$4}"
  done
 else
  echo "arg3 err!"
  exit 1
 fi
 ;;
 
-d)
 if [ "$3" ]; then										#eg.change ***.abc to ***
  for filename in *.$3
  do
   mv "$filename" "${filename/.$3/}"
  done
 else
  echo "arg3 err!"
  exit 1
 fi
 ;;
 
-a)
 if [ "$3" ]; then										#add suffix
  for filename in *
  do 
   if [ "$filename" != "$0" ]; then
   mv "$filename" "$filename.$3"
   fi
  done
 else
  echo "arg3 err!"
  exit 1
 fi
 ;;
 
-h)																		#display help
 man
 ;;
 
*)
 man
 exit 1
esac