Shell Programming and Scripting

$ls  aa/
a.gif
a.txt
k.xml
$ls bb/
a.gif                          a.txt                        k.xml
a.gif_2010003181244    a.txt_2010003181244  k.xml_2010003181244

#!/bin/sh  
s_dir=~/acct/a/aa
d_dir=~/acct/a/bb
ls -1 $s_dir|sort>temp_1
ls -1 $d_dir|sort>temp_2

if [  `comm -23 temp_1 temp_2|wc -l` -gt 0 ];then
for file in `comm -23 temp_1 temp_2`
do 
cp $s_dir/$file $d_dir/$file
done
fi

ls -1 $d_dir|sed 's/\(.*\)\_.*/\1/'|sort|uniq -c | awk '{print $1,$2 }'>temp_3

for val in `awk '{print $1}' temp_3`
do

if [ $val -lt 4 ];then
for file in `awk '{print $2}' temp_3` 
do 
cp $s_dir/$file $d_dir/$file`date +"_%Y%m%d%H%M"`
done 
fi
done
rm temp_1 temp_2

a.gif       a.txt      k.xml
a.gif_1    a.txt_1   k.xml_1

a.gif       a.txt      k.xml
 a.gif_1    a.txt_1   k.xml_1
a.gif_2    a.txt_2   k.xml_2

echo "Enter the First(Source) Directory:"
read sdir
echo "Enter the Second(Destination) Directory:"
read ddir

if [ -d $sdir ]
then
ls $sdir > stemp
else
echo "Given Source Directory $sdir isn't available"
exit 1
fi

if [ -d $ddir ]
then
ls $ddir > dtemp
else
echo "Given Destination Directory $ddir isn't available"
exit 1
fi

comm -12 stemp dtemp > files
no=`comm -13 stemp dtemp | sort |sed -nr '$s/.*_(.*)/\1/p'`
if [[ $no -eq 4 ]];then
echo "Limit 4 reached.Can't copy the files from source $sdir to destination $ddir"
rm -rf stemp dtemp files
exit 0
fiecho "Enter the First(Source) Directory:"
read sdir
echo "Enter the Second(Destination) Directory:"
read ddir

if [ -d $sdir ]
then
ls $sdir > stemp
else
echo "Given Source Directory $sdir isn't available"
exit 1
fi

if [ -d $ddir ]
then
ls $ddir > dtemp
else
echo "Given Destination Directory $ddir isn't available"
exit 1
fi

comm -12 stemp dtemp > files
no=`comm -13 stemp dtemp | sort |sed -nr '$s/.*_(.*)/\1/p'`
if [[ $no -eq 4 ]];then
echo "Limit 4 reached.Can't copy the files from source $sdir to destination $ddir"
exit 0
fi
let no+=1
while read file
do
target=$file`echo _$no`
cp $sdir/$file $ddir/$target
done < files

rm -rf stemp dtemp files

a.gif       a.txt      k.xml
 a.gif_1    a.txt_1   k.xml_1
a.gif_2     a.txt_2
a.gif_3