How to store the output of "time dd if= of=" in a variable


 
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# 1  
Old 03-04-2009
Question How to store the output of "time dd if= of=" in a variable

Hi All,

I need to store the real seconds of the following command in a variable. How could it be done?

Code:
time $(dd if=/dev/zero of=/dev/sda1 bs=512 count=2048;sync)

Thanks,
Amio
# 2  
Old 03-04-2009
Code:
VAR=$(time dd if=/dev/zero of=/dev/sda1 bs=512 count=2048;sync)

What you were doing before was basically:

Code:
time <output of "dd" command>

which doesn't make sense because the syntax for "time" is

Code:
time <command>

# 3  
Old 03-04-2009
Hi Gee-Money,

Thanks for ur reply. It did not work.
I also tried,
Code:
sec=$({TIMEFORMAT=%S;time dd if=/dev/zero of=/dev/sda1 bs=512 count=2048;sync;} 2>&1)
echo Seconds: $sec

But the variable sec shows the output of "dd" command.. But i need the variable to show the output of time command...

thanks
# 4  
Old 03-04-2009
Try something like this:

Code:
sec=$(time 'dd if=/dev/zero of=/dev/sda1 bs=512 count=2048;sync' 2>&1 1>&3)

Regards
# 5  
Old 03-04-2009
Hi Franklin,
Sorry, it ended with "Bad File Descriptor"..
Thanks
Amio
# 6  
Old 03-04-2009
Quote:
Originally Posted by amio
Hi Franklin,
Sorry, it ended with "Bad File Descriptor"..
Thanks
Amio
Try this:

Code:
 sec=$(time 'dd if=/dev/zero of=/dev/sda1 bs=512 count=2048;sync' 2>&1)

Regards
# 7  
Old 03-04-2009
Franklin,
I tried that also.. It showed sec: dd if=/dev/zero of=/dev/sda1 bs=512 count=2048;sync: No such file or directory.

Just tried by removing single quote also.. it does not print anything for sec variable..

Thanks
amio
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