学习日记

NOARGS=65

CONFIRM_FAIL=66

RUNONCE_FLAG=67

# Input the first level directory.

# The dirctories structure is like this:

# first level directory

#    second level directory 1

#       files in second level directory 1

#    second level directory 2

#       files in second level directory 2

#    second level directory 3

#       files in second level directory 3

# …

if [ $# -lt 3 ]

then

   echo “Usage: $0 dir redir suffix …”

   exit $NOARGS

fi

dir=$1

redir=$2

suffix=$3

echo “your first argument is $dir”

echo “your second argument is $redir”

echo “your third argument is $suffix”

if [ $dir != $redir ]

then

   echo “Usage: $dir must equal to $redir for confirming…”

   exit $CONFIRM_FAIL

fi

if [ -e $dir/runonce.flag ]

then

   echo “Usage: This program can only run once!”

   exit $RUNONCE_FLAG

fi

directorys=$dir/*

for directory in $directorys; do # Find all second level directories

     if [ -d “$directory” ] # Note! It must add double quote before

                            # and after $directory, otherwise, it will

                            # report error if there is blank or chinese

                            # in $directory.

     then

        echo “$directory is a directory”

        count=0

        for file in “$directory”/*$suffix; do # Find the mp3 file in second

                                              # level directory

           if [ -f “$file” ]

           then

              echo “$file is a file”

              dirname=${directory##*/} # get the second level directory name

                                       # without its prefix path like /home/m/

              echo “$file’s directory is $dirname”

              if [ $count -gt 0 ]

              then

                 echo “rename $file to $directory/$dirname$count$suffix”

                 echo ” rename #$count file begin…”

                 mv “$file” “$directory/$dirname$count$suffix”

              else

                 echo “rename $file to $directory/$dirname$suffix”

                 mv “$file” “$directory/$dirname$suffix”

              fi

              let “count = count + 1″

              echo “rename $count file ok” 

           fi

        done

     else

        echo “$directory is not a directory”

        echo “Usage: $0 dir redir …”

     fi

done

# Write runonce flag file into the first level directory

echo “Run rename.sh once at `date`” > $dir/runonce.flag

exit 0