Shell Programming and Scripting

# cat file1
"0001"~"name"~"bb"~"20.25"~"0010"
~"abc"~"0002"~"name"~"dd"~"35.50"~"25"~
"xxx"~"0003"~"name"~"aa"~"21.3

5"~"0056"~"ijk"~



"0001"~"name"~"bb"~"20.25"~"0010"
~"abc"~"0002"~"name"~"dd"~"35.50"~"25"~
"xxx"~"0003"~"name"~"aa"~"21.3

5"~"0056"~"ijk"~
"0001"~"name"~"bb"~"20.25"~"0010"
"0001"~"name"~"bb"~"20.25"~"0010"




~"abc"~"0002"~"name"~"dd"~"35.50"~"25"~
"xxx"~"0003"~"name"~"aa"~"21.3
5"~"0056"~"ijk"~
~"abc"~"0002"~"name"~"dd"~"35.50"~"25"~
"xxx"~"0003"~"name"~"aa"~"21.3

5"~"0056"~"ijk"~

# ./justdoit file1 "~" 6
"0001"~"name"~"bb"~"20.25"~"0010"~"abc"~
"0002"~"name"~"dd"~"35.50"~"25"~"xxx"~
"0003"~"name"~"aa"~"21.35"~"0056"~"ijk"~
"0001"~"name"~"bb"~"20.25"~"0010"~"abc"~
"0002"~"name"~"dd"~"35.50"~"25"~"xxx"~
"0003"~"name"~"aa"~"21.35"~"0056"~"ijk"~
"0001"~"name"~"bb"~"20.25"~"0010""0001"~"name"~
"bb"~"20.25"~"0010"~"abc"~"0002"~"name"~
"dd"~"35.50"~"25"~"xxx"~"0003"~"name"~
"aa"~"21.35"~"0056"~"ijk"~~"abc"~
"0002"~"name"~"dd"~"35.50"~"25"~"xxx"~
"0003"~"name"~"aa"~"21.35"~"0056"~"ijk"~

# ./justdoit file1 "~" 6 >output

# cat justdoit
#!/bin/bash
## justdoit @ygemici unix.com simple parser ##
## Usage e.g -> ./justdoit FILENAME "SPLITCHAR" COUNT ##
backup() {
cp $1 $1.bck && cp $1.bck $1.sed
}
backup $1
if [ ! $? -eq 0 ] ; then
echo "There is a problem while backuping your FILE!!";exit 1
fi
doit() {
len=$(tr -cd "$2" <$1|wc -c)
sed ':e;N;s/\n//g;te' ${1}.sed >${1}.sed.bck && mv ${1}.sed.bck ${1}.sed
for ((i=$3;i<${len};i=i+$3));
do
sed 's/~/~X_XsedX/'$i'' ${1}.sed >${1}.sed.bck && mv ${1}.sed.bck ${1}.sed
done
sed 's/X_XsedX/\n/g' ${1}.sed
}
doit "$1" "$2" $3;rm -f ${1}.sed

awk 1 RS=\~ infile | awk 'NF{if (/name/)print RS;print p;p=$0}END{print p}' | awk '{gsub(ORS,"~");print $0 "~"}' RS=