Assume I have a text file as below:
me
con pi
ind ken
pras ur
me
con rome
ind kent
pras urs
pintu
con mys
ind pan
pras ki
con kit
ind sys
My requirement,
I need to search for "con rome" and if exists, then print 4th word from rome, i.e in above example, since "con rome"... (4 Replies)
Hello,
I want to retrieve 2, 6, 10, 14...... (each 4 lines apart) from a file that looks like the sample below. In other words, I want only lines corresponding to the Xs.
Header1_a
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Header1_b
yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy
Header2_a... (2 Replies)
I want to match the number exactly from the variable which has multiple numbers seperated by pipe symbol similar to search in egrep.below is the code which i tried
#!/usr/bin/perl
my $searchnum = $ARGV;
my $num = "148|1|0|256";
print $num;
if ($searchnum =~ /$num/)
{
print "found";
}... (2 Replies)
So far what i've got is
egrep '^(\\)\*$'No luck.
I've searched the web and not much luck. I know about the escape character \ but its confusing to figure out how to use it to match a backslash and use it to escape the asterisk also. Any ides? Thanks! (8 Replies)
not getting anywhere with this
an xml file contains multiple clients set up with same tags, different values.
I need to parse the file for client foo, and change the value of tag "64bit" from false to true.
cat clients.xml
<Client type"FIX">
<ClientName>foo</ClientName>... (3 Replies)
I'd like to read a file (mydata.dat) line by line. The file consists of 5 columns filled with numbers, like so:
83.018 1.953 49.587 20550.000 353
83.213 1.953 49.195 20600.000 171
84.935 1.954 48.803 20650.000 920
For every read line (i.e. in every... (2 Replies)
echo 'String#1 and String#2' | egrep -o -m 1 'String#.{1}'
String#1
String#2
I'm trying to just match the first occurrence of 'String#' + 1 character. I thought the "-m 1" switch would do that for me. Instead I get both occurrences. Can somebody provide some insight?
Thanks! (5 Replies)
Hi
I need to egrep patterns in a file and limit number of matches to print for each matched pattern.
-m10 option is not working out in my sun solaris 5.10
Please guide me the options to achieve.
if i do head -10 , i wont be getting all pattern match results as output since for a... (10 Replies)
Discussion started by: ananan
10 Replies
LEARN ABOUT FREEBSD
escape
escape(1) Mail Avenger 0.8.3 escape(1)NAME
escape - escape shell special characters in a string
SYNOPSIS
escape string
DESCRIPTION
escape prepends a "" character to all shell special characters in string, making it safe to compose a shell command with the result.
EXAMPLES
The following is a contrived example showing how one can unintentionally end up executing the contents of a string:
$ var='; echo gotcha!'
$ eval echo hi $var
hi
gotcha!
$
Using escape, one can avoid executing the contents of $var:
$ eval echo hi `escape "$var"`
hi ; echo gotcha!
$
A less contrived example is passing arguments to Mail Avenger bodytest commands containing possibly unsafe environment variables. For
example, you might write a hypothetical reject_bcc script to reject mail not explicitly addressed to the recipient:
#!/bin/sh
formail -x to -x cc -x resent-to -x resent-cc
| fgrep "$1" > /dev/null
&& exit 0
echo "<$1>.. address does not accept blind carbon copies"
exit 100
To invoke this script, passing it the recipient address as an argument, you would need to put the following in your Mail Avenger rcpt
script:
bodytest reject_bcc `escape "$RECIPIENT"`
SEE ALSO avenger(1),
The Mail Avenger home page: <http://www.mailavenger.org/>.
BUGS
escape is designed for the Bourne shell, which is what Mail Avenger scripts use. escape might or might not work with other shells.
AUTHOR
David Mazieres
Mail Avenger 0.8.3 2012-04-05 escape(1)