In what way did it "not work"? What did it actually do?
Whenever arguments start being finicky, its a good idea to print them back out to make sure you're putting in what you think you are. Try
to make sure its doing what you think it is.
eval is definitely not "the way" to do this. That it's not working suggests to me the input might have things in it which are unexpected and eval works around by quote-splitting or some such.
Hi folks,
I'm looking for a solution to pass variables to a sed-command. I'm reading a lot of threats and also the q&a "How can I use a variable in sed?". None of these commands works. I'm using AIX 5.2.
I want to do the following:
NUMBER=` echo 38341` | sed -n '/$NUMBER/p'
an obtained... (3 Replies)
I m trying to pass variable to sed.
export var=140920060731
sed -e '/$var/d' file
but no luch so far..? any body has any idea abt it
Is there any way to pass variable to SED?
Thanks ,
Manish (2 Replies)
Hi Folks,
How can I make the following to work from a korn shell?
old="OLDSTRING"
new="NEWSTRING"
file="myfile.txt"
sed -n 's/$old/$new/gp' $file
Thanks in advance
rogers42 (3 Replies)
Dear All,
I want to print a file.
First I tried with this
sed '2q;d' filename
it worked. But when i put following it is not working
x=2;
sed '$xq;d' filename
Would any one suggest how to pass the variable? (7 Replies)
Hi Everyone!!
Hey i created a SFTP function to FTP the file from unix to Linux.
I need to FTP the 48 files from unix to linux.
IP=$1
Userid=$2
Prikeypath=$3
SrcPath=$4
DstPath=$5
Files=$6
BATCHFILE=sftp.batch.$$
LOGFILE=sftp.log.$$
#Compose batch file & pass as argument to the... (1 Reply)
Hi Experts,
I am passing current month & day (i.e. 'Jul 21') from script aaa.ksh to zzz.ksh. The value 'Mon DD' is being used in zzz.ksh.
Problem: If I pass 'Mon DD' value manually to zzz.ksh i.e.
/test/zzz.ksh 'Jul 21'
it works fine. However, if I pass value from aaa.ksh, it does... (2 Replies)
Hi Gurus,
I have small issue...
I used to pass the passwd for sudo commands like below,
gzcat ~/passwd.gz | sudo su - <villin> >> eof
------
-----
------
eof
And it was able to login into "villin" sudo account successfully. But now, I'm using the same in another script for the... (2 Replies)
Hi,
I'm trying to check if methods specified in a class have been added to the corrosponding interface.
My code below is giving me the following errors:
grep: function: No such file or directory
grep: import($zipfile): No such file or directory
grep: function: No such file or... (1 Reply)
Hi,
I want to pass value of a variable track_line which is the line number to sed. Sed should print the lines starting from track_line till the last
line of the file. I tried the below command but it is not working.
sed -n '${track_line},$p' latest_log_file
I tried using the below too but... (1 Reply)
Discussion started by: nitinupadhyaya8
1 Replies
LEARN ABOUT MOJAVE
universal::require5.18
UNIVERSAL::require(3) User Contributed Perl Documentation UNIVERSAL::require(3)NAME
UNIVERSAL::require - require() modules from a variable
SYNOPSIS
# This only needs to be said once in your program.
require UNIVERSAL::require;
# Same as "require Some::Module"
my $module = 'Some::Module';
$module->require or die $@;
# Same as "use Some::Module"
BEGIN { $module->use or die $@ }
DESCRIPTION
If you've ever had to do this...
eval "require $module";
to get around the bareword caveats on require(), this module is for you. It creates a universal require() class method that will work with
every Perl module and its secure. So instead of doing some arcane eval() work, you can do this:
$module->require;
It doesn't save you much typing, but it'll make alot more sense to someone who's not a ninth level Perl acolyte.
Methods
require
my $return_val = $module->require or die $@;
my $return_val = $module->require($version) or die $@;
This works exactly like Perl's require, except without the bareword restriction, and it doesn't die. Since require() is placed in the
UNIVERSAL namespace, it will work on any module. You just have to use UNIVERSAL::require somewhere in your code.
Should the module require fail, or not be a high enough $version, it will simply return false and not die. The error will be in $@ as well
as $UNIVERSAL::require::ERROR.
$module->require or die $@;
use
my $require_return = $module->use or die $@;
my $require_return = $module->use(@imports) or die $@;
Like "UNIVERSAL::require", this allows you to "use" a $module without having to eval to work around the bareword requirement. It returns
the same as require.
Should either the require or the import fail it will return false. The error will be in $@.
If possible, call this inside a BEGIN block to emulate a normal "use" as closely as possible.
BEGIN { $module->use }
SECURITY NOTES
UNIVERSAL::require makes use of "eval STRING". In previous versions of UNIVERSAL::require it was discovered that one could craft a class
name which would result in code being executed. This hole has been closed. The only variables now exposed to "eval STRING" are the
caller's package, filename and line which are not tainted.
UNIVERSAL::require is taint clean.
COPYRIGHT
Copyright 2001, 2005 by Michael G Schwern <schwern@pobox.com>.
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
See http://www.perl.com/perl/misc/Artistic.html
AUTHOR
Michael G Schwern <schwern@pobox.com>
Now maintained by Neil Bowers (NEILB).
SEE ALSO
Module::Load, "require" in perlfunc, <http://dev.perl.org/rfc/253.pod>
perl v5.18.2 2013-09-27 UNIVERSAL::require(3)