Selected output from a file starting from a particular text

Example file
$cat abc.txt
sasas
fsdfsd
fsdfsdf
ddfsgsdg{
sdfds
{
fdsfd
sdafsda{
{
name=killer
d=123}
{
name=good
cdsadsad
}

######grepcat.sh#######
#! /bin/bash
tn=`cat $1|wc -l`
ln=`cat $1 |grep -n $2 |cut -d ":" -f1`
on=`expr $tn - $ln`
cat $1|grep -A$on $2
########################

To run

#sh grepcat.sh abc.txt killer