tlg_bot_test.sh

#!/bin/bash

timeout=10
token=TOKEN
chat_id=CHAT_ID
json_s="https://api.telegram.org/bot$token/sendMessage -d chat_id=$chat_id"
# initial message
curl -s -X POST https://api.telegram.org/bot$token/sendMessage -d chat_id=$chat_id -d text="start" &> /dev/null
sleep 2
curl -s -X POST https://api.telegram.org/bot$token/sendMessage -d chat_id=$chat_id -d text="enter commands" &> /dev/null
json_r_init="https://api.telegram.org/bot$token/getUpdates"
json_r="https://api.telegram.org/bot$token/getUpdates?offset="
wget "$json_r" -q -O jsontest_init
counts_init=0
counts_init=$(cat jsontest_init | jq -r '.result | length')
upd_id_init=$(cat jsontest_init | jq ".result[$counts_init-1].update_id")
upd_id=$upd_id_init
wget "$json_r"$upd_id_init -q -O jsontest0
counts=0
counts=$(cat jsontest0 | jq -r '.result | length')
while true
do
wget "$json_r"$upd_id -q -O jsontest1
if [ $(stat -c %s jsontest0) -ne $(stat -c %s jsontest1) ]; then
   counts=$(cat jsontest1 | jq -r '.result | length')
   cmd=$(cat jsontest1 | jq ".result[$counts-1].message.text")
   upd_id=$(cat jsontest1 | jq ".result[$counts-1].update_id")
   wget "$json_r"$upd_id -q -O jsontest0
   result=$(bash -c \""$cmd"\")
   if [ $? -eq 0 ]; then
       echo "Success"
       curl -s -X POST https://api.telegram.org/bot$token/sendMessage -d chat_id=$chat_id -d text="$result" &> /dev/null
   fi
#else
#    echo "no command"
#    curl -s -X POST https://api.telegram.org/bot$token/sendMessage -d chat_id=$chat_id -d text="$upd_id" &> /dev/null
fi
sleep $timeout
done