No. Begin and End blocks in awk are meant to be used before and after all lines are processes; repectively, and appear as follow in awk script..
I suggest you call gawk in this fashion until you are comfortable with awk/gawk...
awk is arguably a 4GL language since every line of the file to be parsed is passed by each line of the awk script, with the exception of awk script in beginning and end sections. Again, Begin is processed before every line and END after the processing of every line. The Begin section is useful for printing headers or initializing counters. The End section is useful for performing end calculations, etc.
Why would you need to use this in a script?
Why can't you just use print to print out what you want printed in the begining and print for what you want at the end.
So this:
nawk 'BEGIN {print "this is the first line"}
{print $1 $2 $3}
{print $5 $6}
END {print "this is the last line"}'
... (2 Replies)
Hi all,
i am new to scripting. i need to write a code to detect begin and end of word that either begins or ends with t,th,d,dh,s,sh
i have a set of words in a file containg one word per line. let the filename be aaa.txt.
i have an another file bbb.txt which has two lines, just specifying the... (7 Replies)
Hi
I have written a script .The script runs properly if i write sql queries .But if i use PLSQL commands of BEGIN if end if , end ,then on running the script the comamds are getting printed on the prompt .
Ex :temp.sql
After connecting to the databse at the sql prompt i type... (1 Reply)
Hi All ,
I am newbie to linux shell scripting , below are the contents of my log file ,
i want the lines between a begin pattern and a end pattern
for an instance , my begin Pattern is "Transaction Begins for Usr"
and end pattern is "Transaction Ends for Usr" into another file
Sample file... (1 Reply)
Hi!
I have a strange behaviour from sed and awk, but I'm not sure, if I'm doing something wrong:
I have a list of words, where I want to add the following string at the end of each line:
\;\;\;\;0\;1
I try like this:
$ cat myfile | awk '{if ( $0 != "" ) print $0"\;\;\;\;0\;1"}'
Result:... (5 Replies)
Hi All,
test file
Begin Script Run at Thu Mar 14 09:24:16 PDT 2013
tst_accounts: ws zip: WS_out_20130313.tar.gz dat: test_20130313.dat count: 63574 loaded: xx pre-merge: xx post-merge: xx timestamp: Thu Mar 14 09:30:42 PDT 2013
tst_accounts: ws zip: WS_out_20130313.tar.gz dat: s_20130313.dat... (6 Replies)
I'm new to awk, trying to understand the basics.
I'm trying to reset the counter everytime the program gets a new file to check.
I figured in the BEGIN part it would work, but it doesn't.
#!/bin/awk -f
BEGIN {counter=0}
{
sum=0
for ( i=1; i<=NF;... (1 Reply)
Hello Friends ,
Please help to create script for compare and replace if not matches of set of lines .
* Primary*
Servername Server1
Location R201
Rack 4
*End Primary*
*Secondary*
Server Name Server1
IPAddress 10.24.30.10
Application Apache
*End of Secondary*
Above... (4 Replies)
Can Someone please explain why BEGIN and END statement is used inside function? How does that help in scripting?
function fileformatting
{
CleanupMask="xXxX"
sed 's/^.//' < ${AllFile} > ${AllFile}.tmp
echo $(wc -l ${AllFile}.tmp)
`awk -v CleanupMask=${CleanupMask} '
BEGIN... (2 Replies)
Discussion started by: later_troy
2 Replies
LEARN ABOUT REDHAT
amplot
AMPLOT(8) System Manager's Manual AMPLOT(8)NAME
amplot - visualize the behavior of Amanda
SYNOPSIS
amplot [ -c ] [ -e ] [ -g ] [ -l ] [ -p ] [ -t T ] amdump_files
DESCRIPTION
Amplot reads an amdump output file that Amanda generates each run (e.g. amdump.1) and translates the information into a picture format
that may be used to determine how your installation is doing and if any parameters need to be changed. Amplot also prints out amdump lines
that it either does not understand or knows to be warning or error lines and a summary of the start, end and total time for each backup
image.
Amplot is a shell script that executes an awk program (amplot.awk) to scan the amdump output file. It then executes a gnuplot program
(amplot.g) to generate the graph. The awk program is written in an enhanced version of awk, such as GNU awk (gawk version 2.15 or later)
or nawk.
During execution, amplot generates a few temporary files that gnuplot uses. These files are deleted at the end of execution.
See the amanda(8) man page for more details about Amanda.
OPTIONS -c Compress amdump_files after plotting.
-e Extend the X (time) axis if needed.
-g Direct gnuplot output directly to the X11 display (default).
-p Direct postscript output to file YYYYMMDD.ps (opposite of -g).
-l Generate landscape oriented output.
-t T Set the right edge of the plot to be T hours.
The amdump_files may be in various compressed formats (compress, gzip, pact, compact).
INTERPRETATION
The figure is divided into a number of regions. There are titles on the top that show important statistical information about the configu-
ration and from this execution of amdump. In the figure, the X axis is time, with 0 being the moment amdump was started. The Y axis is
divided into 5 regions:
QUEUES: How many backups have not been started, how many are waiting on space in the holding disk and how many have been transferred
successfully to tape.
%BANDWIDTH: Percentage of allowed network bandwidth in use.
HOLDING DISK: The higher line depicts space allocated on the holding disk to backups in progress and completed backups waiting to be
written to tape. The lower line depicts the fraction of the holding disk containing completed backups waiting to be written to tape
including the file currently being written to tape. The scale is percentage of the holding disk.
TAPE: Tape drive usage.
%DUMPERS: Percentage of active dumpers.
The idle period at the left of the graph is time amdump is asking the machines how much data they are going to dump. This process can take
a while if hosts are down or it takes them a long time to generate estimates.
AUTHOR
Olafur Gudmundsson ogud@tis.com
Trusted Information Systems
formerly at University of Maryland, College Park
BUGS
Reports lines it does not recognize, mainly error cases but some are legitimate lines the program needs to be taught about.
SEE ALSO amanda(8), amdump(8), gawk(1), nawk(1), awk(1), gnuplot(1), sh(1), compress(1), gzip(1)4th Berkeley DistributionAMPLOT(8)