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.
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 am trying to understand how to use the END block in awk without much success. I have this script that I found:
gawk '{count++; keyword = $1}
if (count == 3) keyword = "order this"
else print keyword " " k
}
}' << orderfile
Is that the way that the END block should be used? I am... (6 Replies)
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 CENTOS
xml::libxml::devel
XML::LibXML::Devel(3) User Contributed Perl Documentation XML::LibXML::Devel(3)NAME
XML::LibXML::Devel - makes functions from LibXML.xs available
SYNOPSIS
/**********************************************
* C functions you want to access
*/
xmlNode *return_node();
void receive_node(xmlNode *);
###############################################
# XS Code
void *
xs_return_node
CODE:
RETVAL = return_node();
OUTPUT:
RETVAL
void
xs_receive_node
void *n
CODE:
receive_node(n);
###############################################
# Perl code
use XML::LibXML::Devel;
sub return_node
{
my $raw_node = xs_return_node();
my $node = XML::LibXML::Devel::node_to_perl($raw_node);
XML::LibXML::Devel::refcnt_inc($raw_node);
return $node;
}
sub receive_node
{
my ($node) = @_;
my $raw_node = XML::LibXML::Devel::node_from_perl($node);
xs_receive_node($raw_node);
XML::LibXML::Devel::refcnt_inc($raw_node);
}
DESCRIPTION
"XML::LibXML::Devel" makes functions from LibXML.xs available that are needed to wrap libxml2 nodes in and out of XML::LibXML::Nodes. This
gives cleaner dependencies than using LibXML.so directly.
To XS a library that uses libxml2 nodes the first step is to do this so that xmlNodePtr is passed as void *. These raw nodes are then
turned into libxml nodes by using this "Devel" functions.
Be aware that this module is currently rather experimental. The function names may change if I XS more functions and introduce a reasonable
naming convention.
Be also aware that this module is a great tool to cause segfaults and introduce memory leaks. It does however provide a partial cure by
making "xmlMemUsed" available as "mem_used".
FUNCTIONS
NODE MANAGEMENT
node_to_perl
node_to_perl($raw_node);
Returns a LibXML::Node object. This has a proxy node with a reference counter and an owner attached. The raw node will be deleted as soon
as the reference counter reaches zero. If the C library is keeping a pointer to the raw node, you need to call refcnt_inc immediately.
You also need to replace xmlFreeNode by a call to refcnt_dec.
node_to_perl
node_from_perl($node);
Returns a raw node. This is a void * pointer and you can do nothing but passing it to functions that treat it as an xmlNodePtr. The raw
node will be freed as soon as its reference counter reaches zero. If the C library is keeping a pointer to the raw node, you need to call
refcnt_inc immediately. You also need to replace xmlFreeNode by a call to refcnt_dec.
refcnt_inc
refcnt_inc($raw_node);
Increments the raw nodes reference counter. The raw node must already be known to perl to have a reference counter.
refcnt_dec
refcnt_dec($raw_node);
Decrements the raw nodes reference counter and returns the value it had before. if the counter becomes zero or less, this method will free
the proxy node holding the reference counter. If the node is part of a subtree, refcnt_dec will fix the reference counts and delete the
subtree if it is not required any more.
refcnt
refcnt($raw_node);
Returns the value of the reference counter.
fix_owner
fix_owner($raw_node, $raw_parent);
This functions fixes the reference counts for an entire subtree. it is very important to fix an entire subtree after node operations
where the documents or the owner node may get changed. this method is aware about nodes that already belong to a certain owner node.
MEMORY DEBUGGING
$ENV{DEBUG_MEMORY}
BEGIN {$ENV{DEBUG_MEMORY} = 1;};
use XML::LibXML;
This turns on libxml2 memory debugging. It must be set before XML::LibXML is loaded.
mem_used
mem_used();
Returns the number of bytes currently allocated.
EXPORT
None by default.
SEE ALSO
This was created to support the needs of Apache2::ModXml2. So this can serve as an example.
AUTHOR
Joachim Zobel <jz-2011@heute-morgen.de>
COPYRIGHT AND LICENSE
Copyright (C) 2011 by Joachim Zobel
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.10.1 or,
at your option, any later version of Perl 5 you may have available.
perl v5.16.3 2013-05-13 XML::LibXML::Devel(3)