$1 $2 are positional parameters of the shell.
Use "quotes" around them to substitute them by their values, but protect the result from further expansions.
Use 'ticks' to get a $1 $2 literally.
For your sed script you want the substitution.
You can also write a concatenations of 'string' and "string with $var":
A concatenation of four strings. The sed sees one string and no quotes. (Tip: use echo to show it on the screen!)
The $var in the echo command should be in "quotes" as well, to have the variable substitution but no further expansions.
HPUX11.0/Korn Shell
I have an old script that takes in a series of arguments when its called. The script is really more of a common set of functions that gets called by other scripts as needed. I have been asked to make this into a menu driven script to rollout to app support for their use during... (2 Replies)
Hello,
I am using the Bourne shell.
I am trying to understand the concept of positional parameters.
I do understand that positional parameters:
1. Are initialized by shell
2. Have a max of 9 parameters ($1 to $9)
3. Have no limit on the number of arguments
4. Can be rearranged... (15 Replies)
I need to get file names from commandline arguments, it may be any no of arguements, Using for loop i got but how do i display it, bcoz $i will give the number i is assigned $$i is not working either $($i), i need the names of the files got in the arguement (2 Replies)
Hi,
Can any one provide the Unix command to reset the positional parameters?
Please see the below example where i have to pass 2 parameters to Shell1.sh.
Step1) . ./Shell1.sh 2 3
successfully executed, Then i executed(next step only) the same shell script again,this time no... (4 Replies)
Hi all,
I have one small requirment...
I have prepared one script. we have to pass two possitional parameters to the script. What I want to do is if the parameters are not passed then i dont want the script to start the process...
For ex:
$ ./a.sh parm1 parm2
#Here, it can start... (7 Replies)
In a Bash script I used getopts command to let a user does something regards to the selected options. The question is: How do you find out what is the name of the file that user inserted in the command line like the following:
The good part is this file is always the last argument in the... (2 Replies)
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
STEP 1: Create a Bash shell script (myscript) inside the a2 directory. The script should allow the user to pass... (3 Replies)
Hi,
I have a script which will be executed using the below command,
bin/nutch crawl urls -dir /data/test/
bin/nutch - Script file
crawl, urls, /data/test/ - Parameters
-dir - Option
The above script should executed from a shell script named test.sh. I have the below code to execute... (2 Replies)
I am trying to code an if statement that accepts two parameters and see if those parameters are in another file called teledir.txt. If it already exists in the file, it is to say "Entry Exists". If not, I add it to the file and say "Entry Added". This is the code I have so far:
if ; then
... (1 Reply)
Discussion started by: Eric7giants
1 Replies
LEARN ABOUT OPENSOLARIS
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)