need help to calculate file download time

[vijjay]

I need to write Unix script file stat.sh that would contain a sequence of UNIX xommands that, when executed, will provide user with the downloading time of small.jpg and big.jpg files at the 28.8Kbps, 33.6Kbps, 50666bps dial up rates, 384Kbps aDSL and 500Kbps cable rate.

(Then with file stat.sh has to be called by other file through SSI "#exec" directive but I know how to make SSI one.)

And I was told that awk utilities are better to solve this problem.

I am just new in this field and have no clue at all what to do and how using Unix and/or awk.

I will appreciate any proper solution/guide or help.

Thanks,
Vijjay

 

[danielhozac]

This should do what you want.
[tt]#!/bin/bash

FILESIZE=$( ls -l $1 | awk '{
if ($5 ~ /^[0-9]+$/)
print $5
}' )
BITS=$( echo "($FILESIZE * 8) / 1024" | bc )
echo "28Kbps: $( echo "$BITS / 28" | bc ) seconds."
echo "33.6Kbps: $( echo "$BITS / 33.6" | bc ) seconds."
echo "50.6Kbps: $( echo "$BITS / 50.6" | bc ) seconds."
echo "384Kbps: $( echo "$BITS / 384" | bc ) seconds."
echo "500Kbps: $( echo "$BITS / 500" | bc ) seconds."[/tt] //Daniel