Visit Our UNIX and Linux User Community


Perl Parsing Argument


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Perl Parsing Argument
# 1  
Old 05-16-2009
Perl Parsing Argument

i wanna passing an argument which read in a file or a set of files if the files are given in the command line, otherwise use STDIN if no file argument.
i got something like that, but it is not really working.
so can anyone help me? which one is better to use for and how? Use perl.

Thank you

Code:
use Getopt()::Long;
GetOptions( "file=s" => \$file );


Code:
$str = @ARGV ? $ARGV[0] : <STDIN>
chomp ($str = <STDIN>);


Previous Thread | Next Thread
Test Your Knowledge in Computers #604
Difficulty: Medium
In MySQL 8.0 table encryption can be managed globally by defining and enforcing encryption defaults
True or False?

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

parsing argument in perl

in bash: LIST=`cat $1` for i in $LIST do ... done how will i do this in perl ? $1 is my first arguement. I'm a newbie in perl and will appreciate much your help guys ... (4 Replies)
Discussion started by: linuxgeek
4 Replies

2. Shell Programming and Scripting

Question about argument parsing in scripts

Hello all, I am relatively new to linux and bash scripting. I have what seems to be a simple question but I'm having trouble finding the answer. The question is what is the difference between the variables $@ and $*. I've seen them both used in the same context, and I've tried a number of... (4 Replies)
Discussion started by: nicthu
4 Replies

3. Shell Programming and Scripting

How to use perl to run bash with argument?

Hi All, I want to run a bash script using perl. But they are in the different dir. #! /usr/bin/perl -w use strict; my $root=`pwd`; chomp($root); my $cmd=".$root/testdir/ft_623.sh 3 4 5 6 7"; print $cmd; my @line=`$cmd`; foreach (@line){ print $_; } ft_623.sh (0 Replies)
Discussion started by: Damon sine
0 Replies

4. Shell Programming and Scripting

PERL need help splitting argument

If i have a script name.pl I run it like name.pl -v file.txt -t ext2 -u user -j how can I edit the array @ARGV so when my script calls $ARGV = -v file.txt $ARGV = -j (2 Replies)
Discussion started by: 3junior
2 Replies

5. Shell Programming and Scripting

Perl parsing compared to Ksh parsing

#! /usr/local/bin/perl -w $ip = "$ARGV"; $rw = "$ARGV"; $snmpg = "/usr/local/bin/snmpbulkget -v2c -Cn1 -Cn2 -Os -c $rw"; $snmpw = "/usr/local/bin/snmpwalk -Os -c $rw"; $syst=`$snmpg $ip system sysName sysObjectID`; sysDescr.0 = STRING: Cisco Internetwork Operating System Software... (1 Reply)
Discussion started by: popeye
1 Replies

6. Shell Programming and Scripting

problem with spaces and argument parsing

public class HelloWorld { public static void main(String args) { System.out.println("Welcome, master"); } } and I compiled using javac HelloWorld.java ] Suppose that I execute the following command directly from the shell: java -XX:OnError="gdb - %p" HelloWorld Then it works... (8 Replies)
Discussion started by: fabulous2
8 Replies

7. Shell Programming and Scripting

not null cheking of an argument in perl

Hi, I have to check whether an argument say $ARGV is not null in an if operator. Please let me know the operator. It would be great if you write a psuedo code. Thanks in advance Ammu (4 Replies)
Discussion started by: ammu
4 Replies

8. Shell Programming and Scripting

argument parsing...

Hi all, Iam a beginer in shell scripting. i need a script that can parse the arguments and store them in variables. ex: ./myScript -v v1 -h v2 -c v3...... can someone suggest me...? tnx in adv. (1 Reply)
Discussion started by: midhun_u
1 Replies

9. UNIX for Dummies Questions & Answers

command line argument parsing

how to parse the command line argument to look for '@' sign and the following with '.'. In my shell script one of the argument passed is email address. I want to parse this email address to look for correct format. rmjoe123@hotmail.com has '@' sign and followed by a '.' to be more... (1 Reply)
Discussion started by: rmjoe
1 Replies

10. Shell Programming and Scripting

shell script argument parsing

how to parse the command line argument to look for '@' sign and the following with '.'. In my shell script one of the argument passed is email address. I want to parse this email address to look for correct format. rmjoe123@hotmail.com has '@' sign and followed by a '.' to be more... (1 Reply)
Discussion started by: rmjoe
1 Replies
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)

Featured Tech Videos