shell脚本学习笔记（二）myplayer添加播放列表的源码

shell脚本学习笔记（二）

                      －－－－－－myplayer添加播放列表的源码
#!/bin/sh
#MList
#############################function  sets#################################
#to add a new item to the list,if the list is not exit,then creat  it 
add()
{
Hold=""   #for hold something
SName=""  #name for the song
Lines="0"
NextLine=""
     Hold=`find $MusicPath -name ListLib`
     if [ -z $Hold ];then  #if the hold is empty
          touch $MusicPath/ListLib
     fi
     while :
     do
        echo "Enter the num of the song you want to add"
        echo "[q to quit][li to see the list]:"
        read SNum
        if [ -n $SNum ];then
            if [ $SNum = "q" ];then
               return 0
            fi
            if [ $SNum = "li" ];then
               ls $MusicPath|sed = 
               echo "****************************************************"
               echo "Enter the number of the song"
               read SNum
            fi
            #get the lines number of the list
            SNum=`expr $SNum /* 2`
            SName=`ls $MusicPath|sed =|sed -n /`echo $SNum/`p`
            Lines=`wc -l $MusicPath/ListLib|awk '{print $1}'`
            NextLine=`expr $Lines + 1`
            echo "$NextLine $MusicPath/$SName">>$MusicPath/ListLib
        else
           echo "You entered anything!Enter again!"
        fi
     done
   return 0
}
 
#delete some items in the list
delete()
{
Hold=""   #for hold something
SName=""  #name for the song
Lines="0"
NextLine=""
MaxLines=""
    Hold=`find $MusicPath -name ListLib`
     if [ -z $Hold ];then  #if the hold is empty
          echo "Still No list ,enter add to creat one!"
          return 0
     fi
     while :
     do
        Lines=`wc -l $MusicPath/ListLib|awk '{print $1}'`
 
        if [ $Lines -eq "0" ]; then
             echo "List empty!"
             return 0
        fi
        echo "Enter the name of the song you want to delet[q to quit]:"
        echo -e "Or enter /"l/" to check the list"
        read SName
        if [ -n $SName ];then
            if [ $SName = "q" ];then
               break
            fi
            if [ $SName = "l" -o $SName = "L" ];then
               cat $MusicPath/ListLib|more         #open the list
               echo "you can enter the number of the song:"
               read Lines
            else
               #get the lines which will be delet
           Lines=`sed -n /`echo $SName/`p $MusicPath/ListLib|awk '{print $1}'`
           fi
            #delet the item choosed
           sed `echo $Lines`d $MusicPath/ListLib>c;mv c $MusicPath/ListLib
 
           #every lines bellow the $Lines minutes 1
           MaxLines=`wc -l $MusicPath/ListLib|awk '{print $1}'`
           while [ $Lines -le $MaxLines ]
           do
             NextLine=$Lines
             Lines=`expr $Lines + 1`
             sed s/$Lines/$NextLine/ $MusicPath/ListLib>out
             mv out $MusicPath/ListLib          
           done
        else
           echo "You entered anything!Enter again!"
        fi
    done 
return 0   
}
 
#play in loop
loopPlay()
{
      echo "loop running....[ctrl]+z to stop!"
      while :
      do
      mplayer `cat $MusicPath/ListLib|awk '{print $2}'`
      done
  return 0
}
 
#play in random
randomPlay()
{
   count="0"
   i="0"
   Hold=`wc -l $MusicPath/ListLib|awk '{print $1}'`
   #when the list is less than 5 items 
  Random=`awk 'BEGIN{srand();print a=int(10*rand())}'`
  if [ $Hold -le "10" ];then
      while :
      do
         if [ $Random -le $Hold ];then
           Play=`sed -n /`echo $Random/`p $MusicPath/ListLib|awk '{print $2}'`
           echo "&&&&&&&&&&&$Play ^^^^^^^^^^^^^^^^^^^^"
           mplayer $MusicPath/$Play
         fi
         Random=`awk 'BEGIN{print a=int(10*rand())}'`
      done
   #when the list is more than 5 items
   else
      while :   #play untill you entered the [esc] button
      do
         Random=`expr $Random + $count`
         i=`expr $Hold - $count`
         if [ $i -ge "5" ];then
             count=`expr $count + 5`
         else 
             count="0"
         fi
         #when the random is more than total items,do nothing
         #if less than items,play the music
         if [ $Random -le $Hold ];then
           Play=`sed -n /`echo $Random/`p $MusicPath/ListLib|awk '{print $2}'`
           echo "&&&&&&&&&&&$Play ^^^^^^^^^^^^^^^^^^^^"
           mplayer $Play
         fi
       Random=`awk 'BEGIN{print a=int(10*rand())}'`
      done
   fi  
return 0
}
 
#select a song to play
selectPlay()
{
Num=""
Hold=""
Play=""
echo "###############################################################"
echo "The items are as following:"
cat `echo $MusicPath`/ListLib|more
echo "###############################################################"
echo "Enter the items' number to select"
read Num
Hold=`wc -l $MusicPath/ListLib|awk '{print $1}'`
if [ $Hold -ge $Num ];then
Play=`sed -n /`echo $Num/`p $MusicPath/ListLib|awk '{print $2}'`
mplayer $Play
else
  echo "No such files!"
fi
}
 
 
 
 
 
#############################################################################
MusicPath=/home/flora/Music     #where the music is stored
export MusicPath
PWDPath=`pwd`  #show the current path
Hold=""   #for hold something
choice=""   #hold for user's choose
 
#see in the .bashrc if it has the right path
#if no then add the new path
Hold=`grep "PATH" "$HOME/.bashrc"|grep $PWDPath`
echo "#######$Hold#######"
if [ -z $Hold ];then   #if the hold is empty
     #add a new path to the $PATH
    echo -e "PATH=$PATH:$PWDPath /n export PATH">>$HOME/.bashrc
    source $HOME/.bashrc   #make the chtoange valued
fi
 
 
echo "MList---ad|de|lo|ra|se|list|lab|q"
echo "ad --add new item to the play list"
echo "de --delete one or more items in the play list"
echo "lo --play the music in the list in loop style"
echo "ra --play the music in the list in random style"
echo "se --play the music by select one item"
echo "list --to see in the music list"
echo "lib --to see in the music library"
echo "q --quit"
 
read choice
while [ $choice!="q" ]
do
  case $choice in
    ad|Ad)
        add
        ;;
    de|De)
        delete
        ;;
    lo|Lo)
        loopPlay
        ;;
    ra|Ra)
        randomPlay
        ;;
     se|Se)
       selectPlay
        ;;
    list|List)
       cat $MusicPath/ListLib|more
       ;;
    lab|Lab)
       ls  $MusicPath|more
       ;;
    q|Q)
        exit 0
        ;;
    *)
       echo "Illegel input enter again!"
        ;;
    esac
 
  echo "MList---ad|de|lo|ra|se|list|lab|q"
  read choice
done