search line with more than two dots if so throw error

Shell Programming and Scripting
1

Hi,
I have a requirement like i have to search a script and find names that conatins more than two dots, if so then throw error.

For ex: a1.b1.comname here i have to find comname and check two dots. it will not throw error

a1.b1.c1.comname here it contains more than 2dots it will throw error.

how i will do this.

Thanks in advance

2 
$ echo "a1.b1.comname" | ruby -e 'puts gets.count(".")>2 ? "error" : "ok"'
ok
$ echo "a1.b1.c1.comname" | ruby -e 'puts gets.count(".")>2 ? "error" : "ok"'
error
3 
$ echo "a1.b1.comname" |awk -F . '{print (NF>3)?"error":"OK"}'
OK

$ echo "a1.b1.c1.comname"  |awk -F . '{print (NF>3)?"error":"OK"}'
error
4 
for S in a1.b1.comname a1.b1.c1.comname
do
   P=${S//[^.]/}
   echo -n "$S : "
   [ ${#P} -le 2 ] && echo "OK" || echo "error"
done

Result

a1.b1.comname : OK
a1.b1.c1.comname : error