topic awk script in Operating System - HP-UX

awk script

skravi17 — Thu, 23 May 2002 02:37:47 GMT

Hi

This is my script

ls -l *.t | awk '{ print x +=$5 }'

it should add all the bytes for *.t files.
but i am getting 2.11362e+08. how to get
correct bytes.

Re: awk script

steven Burgess_2 — Thu, 23 May 2002 02:42:51 GMT

Hi

The output is 200 meg

Regards

Steve

Re: awk script

steven Burgess_2 — Thu, 23 May 2002 02:45:57 GMT

Hi

Another way of doing it would be to

ls -l | awk '{ print $5 } > /tmp/totals

Then add the totals in the file with

cat /tmp/totals | awk 'BEGIN {total=0;} {total=total+$1;} END {print total,"\n";}'

Regards

Steve

Re: awk script

steven Burgess_2 — Thu, 23 May 2002 02:48:09 GMT

Hi again

Sorry, the correct value is 211,362,000

2^8

Regards

Steve

Re: awk script

S.K. Chan — Thu, 23 May 2002 03:56:39 GMT

Use the printf function within awk .. for example ..

# ls -l *.t | awk '{ printf ("%10.2f\n",x+=$5) }'

That will give you 10 digits before the decimel point and 2 digits after the decimel point.

Re: awk script

skravi17 — Thu, 23 May 2002 04:07:16 GMT

Hi
Thanks steven and skchan. skchan script
rectified my problem.

Re: awk script

steven Burgess_2 — Thu, 23 May 2002 04:10:50 GMT

Hi

I see you are a new forum user

You can assign points by clicking on the 'assign points' tab next to replies

Regards

Steve

Re: awk script

Nagarathinam — Thu, 23 May 2002 04:51:23 GMT

Just multiply the fraction by 100.

Naga

Re: awk script

Nagarathinam — Thu, 23 May 2002 04:53:52 GMT

The result obtained is in MBs.

Naga

Re: awk script

H.Merijn Brand (procura — Thu, 23 May 2002 11:15:23 GMT

# perl -le '$s+=-s for<*.t>;print$s'

or reformatted to your liking

perl -le '$s+=-s for<*.t>;printf"%8.2f",$s'

Re: awk script

Shannon Petry — Thu, 23 May 2002 18:16:20 GMT

Only one person pointed out the correct solution, but didnt explain the problem.

Problem: printing num E
This is the behavior of the print statement in awk.

Solution: use printf
printf() syntax is exactly like in C programming.

Regards,
Shannon

Re: awk script

Klaus Crusius — Fri, 24 May 2002 07:35:38 GMT

Hi,

unfortunately awk uses internally a floating point arithmetic. That is less accurate than using integer arithmitic with same variable size, because some of the bytes are used for the exponent.

Regards, Klaus