hi all
i was going through some perl code i came across this line and i am not getting what is exactly going on ..
$$this{localtion} = GetName->GetVarName("EXE_DIR") ;
what is the red part doing in above code (2 Replies)
All,
Does it matter what perl verios your running when you get syntax errors?
on version 5.6.1 the code works fine, but on 5.8.0 the code gets errors?
#!/usr/bin/perl
#use strict;
#use warnings;
my $mess = 'messages';
my $mess1 = 'messages.1';
my $mess2 = 'messages.2';
my... (13 Replies)
Im new at scripting and im trying to write a script using perl that will make sure there are 2 command line integer arguments and then check if the 2nd argument is greater than the first. i believe im close but still receive my error message even when i have 2 arguments and the second part gives me... (6 Replies)
Hi,
I am a newbie to PERL and working on a script. When running it I get a lot of compilation errors.
The actual command in the program (which is within a case structure) is given below
# This gives the actual count of inquires from a log file (It works fine when I type this on the... (2 Replies)
I'm just trying to confirm that I understand someone's code correctly.
If someone has code that says:
$foo ||= mysub();
I'm assuming that it means if $foo is nothing or undef, then assign it some value via mysub(). If I'm wrong on this, please let me know.
Also, what's the difference... (4 Replies)
Hi,
i am running this code but i am getting syntax error
#!/usr/bin/perl
use warnings;
use strict;
use XML::LibXML;
use XML::LibXML::Reader;
use Data::Dumper;
my $file;
open( $file, 'DTC_Specification_transformed.xml');
my $reader = XML::LibXML::Reader->new( IO => $file ) or die... (1 Reply)
Hallo everybody,
I have a following problem - I'm doing a map funciont to fill in a HTML table and I want to use some radiobutton groups. Unfortunatelly, they are grouped by names, so I have to add some "counter" that will divide one row from another, and I'm using CGI.pm for generating the... (3 Replies)
Query with perl syntax
Aim: is to change a perl script to use a new file
I was required to replace
- entries \"$entries\"
with
-lib <full_path_to_filename>
So in the code detector.pm
sub rundetector
{
my $class = shift;
mkdir($resultDirectory);
my... (3 Replies)
Greetings!
Here's what I believe is a "simple one" for the community tonight ;)
What I'm trying to do is assign a "true/false" value to a variable depending upon whether a named process (some-process) exists; and then test for this value in the succeeding logic. I banged my head against the... (2 Replies)
Discussion started by: LinQ
2 Replies
LEARN ABOUT CENTOS
shell-quote
SHELL-QUOTE(1) User Contributed Perl Documentation SHELL-QUOTE(1)NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$SHELL -c". This doesn't work as intended:
ssh host touch 'hi there' # fails
It creates 2 files, hi and there. Instead, do this:
cmd=`shell-quote touch 'hi there'`
ssh host "$cmd"
This gives you just 1 file, hi there.
process find output
It's not ordinarily possible to process an arbitrary list of files output by find with a shell script. Anything you put in $IFS to
split up the output could legitimately be in a file's name. Here's how you can do it using shell-quote:
eval set -- `find -type f -print0 | xargs -0 shell-quote --`
debug shell scripts
shell-quote is better than echo for debugging shell scripts.
debug() {
[ -z "$debug" ] || shell-quote "debug:" "$@"
}
With echo you can't tell the difference between "debug 'foo bar'" and "debug foo bar", but with shell-quote you can.
save a command for later
shell-quote can be used to build up a shell command to run later. Say you want the user to be able to give you switches for a command
you're going to run. If you don't want the switches to be re-evaluated by the shell (which is usually a good idea, else there are
things the user can't pass through), you can do something like this:
user_switches=
while [ $# != 0 ]
do
case x$1 in
x--pass-through)
[ $# -gt 1 ] || die "need an argument for $1"
user_switches="$user_switches "`shell-quote -- "$2"`
shift;;
# process other switches
esac
shift
done
# later
eval "shell-quote some-command $user_switches my args"
OPTIONS --debug
Turn debugging on.
--help
Show the usage message and die.
--version
Show the version number and exit.
AVAILABILITY
The code is licensed under the GNU GPL. Check http://www.argon.org/~roderick/ or CPAN for updated versions.
AUTHOR
Roderick Schertler <roderick@argon.org>
perl v5.16.3 2010-06-11 SHELL-QUOTE(1)