Sorry, maybe "quoted-printable" was the wrong choice for the attachment.
I'll paste the script at the bottom of this mail.
Calculations in the shell are a bit tricky. The least common denominator seems
to be the 'dc' command (desktop calculator?) which features some reverse polish
notations (like in forth or postscript ...).
Unfortunately dc expects a file which contains the appropriate commands. Now,
the special file name '-' means standard input. So the following commands get
piped into dc via the echo command
(in human readable form)
I reply only now cause i have had a bad hd failure ( a 6 month old 160
gb maxtor :( )
I think bc is standard enought and easier to be used, even if here it's
enought a $(( a * b )) .
For example here is a piece of code from mod2ogg.sh included in uade (
unix amiga delitracker emulator, used to play mods from amiga on a linux
pc ) i wrote and i'm mantaining:
imho clearer and easier than "count=`echo $2 "2048 * p q" | dc -` "
in Fact echoing scale=4 mean 4 digits after the point, then i want to
divide $TMPFILESIZE by 176400 in a normal fashion, without reverse
polish madness.
Returning to the script, i would write:
count= $(( $2 * 2048 ))
And also this script seems posix compliant, so it's better to change
/bin/bash to /bin/sh
