#!/bin/bash
sort -k3 /tmp/oper/tmp_fnex_file_1 > /tmp/oper/.tmp_tmp_fnex_file_1
awk -v w=$1 'BEGIN{printf "%+60s\n%+60s\n%+60s\n\n%s\n%s\n","    *************************************",
"-- Welcome to Interface Check Menu --","  *************************************",
"Now viewing all interfaces...","  *************************************************"};
{system("sleep 0.1");$2="";$1=substr($1,1,length($1-1));}{if(NR%w){printf("%s%s%s\n",NR,"-> ",$0)}
else{printf "%d%s%s\n%s\n",NR,"-> ",$0,"  *************************************************"}};
END{printf "%s","  *************************************************"
}' /tmp/oper/.tmp_tmp_fnex_file_1
N=$(($1-1));NN=$(wc -l</tmp/oper/tmp_fnex_file_1)

tmpcase='_case_m_f'
echo -e 'case $c in'>$tmpcase
xx=1;f=0;x=c
echo "[$xx-$N])c=\$$x;;">>$tmpcase
for((i=1;i<$NN-$N;i+=$N+1));do
#x='$(($c-'$xx'))'
echo "[$xx][$f-$N])c=\$$x;;">>$tmpcase;((xx++))
done
l=$(echo $NN|sed 's/.*\(.\)$/\1/')
echo "[$xx][$f-$l])c=\$$x;;">>$tmpcase
echo -e 'q|Q|[a-z]*|[A-Z]*)echo "quitting..";break;;
*)echo "invalid choice!!"\nesac'>>$tmpcase
if ! [ -x _$tmpcase ] ; then
chmod u+x $tmpcase ; fi

while :; do
echo -e "\n ================================="
read -p "   Enter your menu choice [1-$NN]:..? " c
. $tmpcase
awk 'NR=='$c' {print $1 "numbered device is-> " $2"!!"}' /tmp/oper/.tmp_tmp_fnex_file_1
done

# ./justdoit 10
                       *************************************
                       -- Welcome to Interface Check Menu --
                       *************************************

Now viewing all interfaces...
  *************************************************
1-> 26  3PPG 3PPG
2-> 11  AAA AAA 1
3-> 71  AAA AAA 2
4-> 73  AAA AAA 2
5-> 72  AAA AAA 3
6-> 12  BG BG 1
7-> 47  BG BG 2
8-> 48  BG BG 3
9-> 49  BG BG 4
10-> 50  BG BG 5
  *************************************************
11-> 21  GHLR TAP fasr port 6
12-> 20  GHLR TAP fast port 1
13-> 29  GHLR TAP fast port 10
14-> 23  GHLR TAP fast port 2
15-> 24  GHLR TAP fast port 3
16-> 25  GHLR TAP fast port 4
17-> 46  GHLR TAP fast port 5
18-> 22  GHLR TAP fast port 7
19-> 27  GHLR TAP fast port 8
20-> 28  GHLR TAP fast port 9
  *************************************************
21-> 401  NDM NDM
22-> 13  PPS PPS 1
23-> 402  PPS PPS Bill - Balance credit and debit
24-> 403  SAiHLR DRP SAiHLR
25-> 62  SAiHLR NSA DAP DRP support in Restore
26-> 45  SAiHLR SAiHLR 1
27-> 60  SAiHLR SAiHLR 2
28-> 4  VMP VMP 10
29-> 44  VMP VMP 2nd xface
30-> 4444  VMP VMP 4444
  *************************************************
  *************************************************
 =================================
   Enter your menu choice [1-30]:..? 34
invalid choice!!

 =================================
   Enter your menu choice [1-30]:..? 29
44:numbered device is-> ACTIVE!!

 =================================
   Enter your menu choice [1-30]:..? q
quitting..