Shell Programming and Scripting

awk '/BEGIN/,/END/'

awk '/BEGIN/,/END/ if only in that range there is /pattern/'

awk '/BEGIN/,/END/ { if ($0 ~ /pattern/) print}'

abc
begin
def
ghi
pattern1
end
begin
pattern1
jkl
end
begin
lyt
end
mno
pqr
begin
stu
vwx
yza
end
def
ghi

begin
def
ghi
pattern1
end

begin
pattern1
jkl
end

$ awk '/begin/{s=""}{s=s ? s ORS $0:$0}/end/{if(s~/pattern1/)print s RS}' file
begin
def
ghi
pattern1
end

begin
pattern1
jkl
end

sed -n "/begin/,/end/{H;/begin/h;}; /end/{g;/pattern1/p;}" file