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Full Discussion: BASH, HASH and AWK
Top Forums UNIX for Dummies Questions & Answers BASH, HASH and AWK Post 302266265 by Corpsehy on Tuesday 9th of December 2008 06:35:47 PM
Old 12-09-2008
BASH, HASH and AWK

Hi,

I am working on this idea that I want to process some information from a command dump.

Using the dump I will search for a string. If it finds the string, it must post a
different/associated string to output/logfile.
Example:
'Find "cookie jar"' then 'echo "carpool/tomorrow" > logfile'

It does not stop with 1 string to search for, it will have around 100 different
strings to search for, and everyone have some other content assigned to it, thus it
should be some clever loop.
I COULD have written one grep for each value, but since it is growing by the day,
I find that a waste of lines and bytes.

To prevent an infinite loop, it should remove what it has already found from the
sourcelist of what to search for or somehow mark it as processed.
(The sourcelist is overwritten each time the PC boots with an updated one)

The tricky bit for me is both how I can arrange it with a HASH table, I've done
something similar in PERL, but in BASH/AWK I am unable to do this. The system is very
limited and its not permitted toexpand on its available apps by any byte atm.

I've drawn out how I think the design is going to work.

In itself, there are several commands it will search the output for, but I am used to
having a launch script, that then uses a "core search" script with the variables that
designs it to that and that output file, predefined variables file and logfile.
It gives control and scalabillity ;-)

(The pink area is where the core script loops in itself to search for every available word)

Is this hard to acomplish?
I've written some BASH scripts in the past, aswell as some BATCH and PERL scripts,
though nothing close to this complexity.
BASH, HASH and AWK-hwscriptpng
 

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LOGSAVE(8)						      System Manager's Manual							LOGSAVE(8)

NAME
logsave - save the output of a command in a logfile SYNOPSIS
logsave [ -asv ] logfile cmd_prog [ ... ] DESCRIPTION
The logsave program will execute cmd_prog with the specified argument(s), and save a copy of its output to logfile. If the containing directory for logfile does not exist, logsave will accumulate the output in memory until it can be written out. A copy of the output will also be written to standard output. If cmd_prog is a single hyphen ('-'), then instead of executing a program, logsave will take its input from standard input and save it in logfile logsave is useful for saving the output of initial boot scripts until the /var partition is mounted, so the output can be written to /var/log. OPTIONS
-a This option will cause the output to be appended to logfile, instead of replacing its current contents. -s This option will cause logsave to skip writing to the log file text which is bracketed with a control-A (ASCII 001 or Start of Header) and control-B (ASCII 002 or Start of Text). This allows progress bar information to be visible to the user on the console, while not being written to the log file. -v This option will make logsave to be more verbose in its output to the user. AUTHOR
Theodore Ts'o (tytso@mit.edu) SEE ALSO
fsck(8) E2fsprogs version 1.42.9 December 2013 LOGSAVE(8)
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