Bash: execute command repeatedly and write output tab seperated to file - bash

Question

I want my file to Log like that:
Time_Namelookup: 0,1 0,2 0,12 0,45 ...
Time_Connect: 0,34 0,23 0,23 0,11 ...
Time_Starttransfer: 0,9 0,23 0,12 ...
I want that Values are added to their specific line every n seconds.
I got a code like this:
while [ "true" ]
do
echo "Time_Namelookup:" >> $file
curl -w "%{time_namelookup}\t" -o /dev/null -s https://website.com/
echo "Time_connect" >> $file
curl -w "%{time_connect}\t" -o /dev/null -s https://website.com/
echo "Time_Starttransfer:" >> $file
curl -w "%{time_starttransfer}\t" -o /dev/null -s https://website.com/
sleep 5
done
But I get something like
Time_Namelookup: 0,1
Time_Connect: 0,34
Time_Starttransfer: 0,9
Time_Namelookup: 0,2
Time_Connect:0,23 0,23
Time_Starttransfer: 0,23
Time_Namelookup: 0,45
Time_Connect: 0,11
Time_Starttransfer: 0,12
Can you help me ?

Answer 1

You could put this inside your loop
if [ ! -f $file ]; then
echo "Time_Namelookup:" > $file
echo "Time_Connect:" >> $file
echo "Time_Starttransfer:" >> $file
fi
name_lookup=$(curl -w "%{time_namelookup}\t" -o /dev/null -s https://website.com/)
connect=$(curl -w "%{time_connect}\t" -o /dev/null -s https://website.com/)
starttransfer=$(curl -w "%{time_starttransfer}\t" -o /dev/null -s https://website.com/)
sed -i -e "s/\(Time_Starttransfer:.*\)/\1 $starttransfer/" \
-e "s/\(Time_Connect:.*\)/\1 $connect/" \
-e "s/\(Time_Starttransfer:.*\)/\1 $starttransfer/" \
$file

Answer 2

you can try this;
file=yourFile
echo "Time_Namelookup :" >> $file
echo "Time_Connect :" >> $file
echo "Time_Starttransfer:" >> $file
while [ "true" ]
do
time_namelookup=$(curl -w "%{time_namelookup}\t" -o /dev/null -s https://website.com/)
time_connect=$(curl -w "%{time_connect}\t" -o /dev/null -s https://website.com/)
time_starttransfer=$(curl -w "%{time_starttransfer}\t" -o /dev/null -s https://website.com/)
sed -i "/Time_Namelookup :/s/$/\t$time_namelookup/" $file
sed -i "/Time_Connect :/s/$/\t$time_connect/" $file
sed -i "/Time_Starttransfer:/s/$/\t$time_starttransfer/" $file
sleep 5
done
sed -i : to be edited in-place.
The following part is to find "Time_Namelookup :" in the file.
/Time_Namelookup :/
/s/$/\t$time_namelookup/"
s :substitute command
/../../ :delimiter
$ :end of line character.
\t$time_namelookup: to append tab and the value.