Hi everyone!

I've been looking for the Shell documentation of BusyBox which I know has been made from a light Debian Almquist Shell.

I'm trying to make for fun a tiny shell script for a desktop-command widget on my n900 which extract the data from cpu_curfreq:

#!/bin/sh

#Freq extraction, formating and wrinting result into userfrec file
cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq|tr -d "\n">/userfreq

#extracting data
Varcurfreq= cat '/userfreq'
result=$(( $Varcurfreq / 1000 ))
echo -n $result
echo " Mhz"

I've found that Dash may be restricted on some operation and I switched to Bash... Anyway I 've got the same problem with the arithmetic division operator "/"

output in dash : 249600./cpu_curfreq.sh: line 8: syntax error: / 1000

I'm kind of a noob and I would really appreciate anyone's help about how to make a division whether in Dash or Bash... or even better if someone has the documentation for BusyBox.

Thank you all Maemoers and future Meegos

I assume, bash is properly installed? By default, bash is not part of the system.

Uuuu. Very bad style! Cat-ing to a file sould be avoided at all, especially to a file at root directory! If you really think you have to use a temporary file, create one in /tmp or /home/user/temp or similar.

Which line is number 8?

Try this one:
http://busybox.net/downloads/BusyBox.html#expr

To assign the output from a command to a shell variable' you'll need to use '$()' as in As x-lette pointed out, neither an intermediate file nor an intermediate var are necessary in your case. The following one-liner does the trick:

Thank you X-lette I know it was crapy way for formating data but as I said I'm noob haha... thank for note.

Manul you indeed did the trick $(()) seems to be a very useful command I didn't know. This is an example of how powerful basic mameo shell is !!!!

Just need one line code Wahooo!!!!

Great!!!

Don't forget simple redirection. < and > works, you know.