08-15-2007
Help with formula in a script
I need some help. I been doing system admin for the last several years and gotten very rusty on scripting. I need to write a script that will take a log entry and do math using two columns of data to create a new column. I am taking the column(#2) that contains the time and the column(#5) that contains transaction milliseconds and subracting that column for the time column to create a new column in the file. I am butting my head against my screen trying to remember who to do it. Here is an example of my log entry.
20070401 004639826 decode 10578 2770 2.77 00:46:37 29.728125 10.732
17509
So to make it easier to understand if I didn't above(up for about 20 hours working on a project so I might be a little fuzzy, LOL)
I want something that does this:
004639826 - 2770 = 004637056
And overwrites the 004637056 to column 8 to have the following output:
20070401 004639826 decode 10578 2770 2.77 004637056 29.728125 10.732
17509
I much appreciate any help that you can provide.
Thanks in Advance.
Scott
Last edited by scottzx7rr; 08-15-2007 at 03:49 AM..
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LEARN ABOUT OPENDARWIN
column
COLUMN(1) BSD General Commands Manual COLUMN(1)
NAME
column -- columnate lists
SYNOPSIS
column [-tx] [-c columns] [-s sep] [file ...]
DESCRIPTION
The column utility formats its input into multiple columns. Rows are filled before columns. Input is taken from file operands, or, by
default, from the standard input. Empty lines are ignored.
The options are as follows:
-c Output is formatted for a display columns wide.
-s Specify a set of characters to be used to delimit columns for the -t option.
-t Determine the number of columns the input contains and create a table. Columns are delimited with whitespace, by default, or with
the characters supplied using the -s option. Useful for pretty-printing displays.
-x Fill columns before filling rows.
DIAGNOSTICS
The column utility exits 0 on success, and >0 if an error occurs.
ENVIRONMENT
COLUMNS The environment variable COLUMNS is used to determine the size of the screen if no other information is available.
EXAMPLES
(printf "PERM LINKS OWNER GROUP SIZE MONTH DAY " ;
printf "HH:MM/YEAR NAME
" ;
ls -l | sed 1d) | column -t
SEE ALSO
colrm(1), ls(1), paste(1), sort(1)
HISTORY
The column command appeared in 4.3BSD-Reno.
BSD
June 6, 1993 BSD