With bash version 3.0 or higher you can use
This little explanation is of courtesy Dark_Helmet over at linxquestions.org
Quote:
BASH_ARGV is a special built-in variable. It's an array of the command line arguments. More specifically, the man page says it's the arguments located on the stack. So it's safe to read them, but I strongly suggest not modifying them. To access the array, use [X] to refer to a specific argument. The arguments are put on the stack "backwards" and explains why the last argument is indexed with 0. Lastly, BASH_ARGV will change inside a function call (because the stack changes). So be careful where/how you access the variable.
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)
Hi all,
I'm new to Shell scripting. In my shell script for Bourne shell, the script accepts a date parameter which is optional. If the value is supplied, the supplied value should be assigned to a variable. If not, the current date will be assigned to the variable. My script is like this.
#!... (9 Replies)
Hi,
If not running a shell script file in current shell (. ./fileName) then $0 represents the executable file name. But in case of invoking shell script file in current shell then i m getting "$0 as -bash" . In such case how can i get the program name (running shell script file name)?
Thanks, (2 Replies)
Hi All,
I have a script which accepts a parameter which can either be blank, a specific value, or a wildcard value. But it never seems to be blank and the wildcard option seems to return the names of matching files in my directory. This happens even with the worlds simplest script that just... (1 Reply)
Hi All,
I want to pass array of argument from Java to a shell script.I can use process builder api and its exec() method to call the script,but the question is how to receive the parameter in the script.
Thanks in advance
---------- Post updated at 10:00 PM ---------- Previous update was... (1 Reply)
Can someone let me know how could I achieve this
In one of per script I am calling the shell script but I need to so one thing that is one shell script call I need to pass pne argument.In below code I am calling my ftp script but here I want to pass one argument so how could I do this (e.g:... (5 Replies)
I want to make a script which takes the number of argument, add those argument and gives output to the user, but I am not getting through...
Script that i am using is below :
#!/bin/bash
sum=0
for i in $@
do
sum=$sum+$1
echo $sum
shift
done
I am executing the script as... (3 Replies)
Hi i have written a shell script that takes only single ip address from the user and calculates its latency and reliability, can you please tell me that what should be done if i want that user should enter 100 or 1000 ip address (5 Replies)
Hi all,
$ echo $SHELL
/bin/bash
Requirement - How to pass oracle sql script as argument to unix shell script?
$ ./output.sh users.sql
Below are the shell scripts and the oracle sql file in the same folder.
Shell Script
$ cat output.sh
#!/bin/bash
.... (7 Replies)
Hi Experts,
I have been trying to work on a simple shell script that will just add the two argument passed to it. Here is what i tried :
#!/bin/bash
welcome(){
echo "Welcome to this Progg. which will accept two parameter"
}
main_logic(){
arg=$#
echo "Number of argument passed is... (4 Replies)
Discussion started by: mukulverma2408
4 Replies
LEARN ABOUT CENTOS
shell-quote
SHELL-QUOTE(1) User Contributed Perl Documentation SHELL-QUOTE(1)NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$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)