05-15-2002
Can there be multi-dimensional variable arrays in borne shell?
Hello -
I've serached the web but can't find much on array script variables (except that C-shell variables are arrays!)
I'm trying to form a 2-D string array: (this is what I want, but in java)
String[][] list = { {"one", "two"}, {"three"} };
I know this is a 1-D string array shell variable:
list="one two"
but how can I get another dimension? (and then index them in borne shell?) (I acknowledge that it might not be possible)
Basically I'd like to have a single variable, it's first set of elements always get evaluated, and if a 2nd dimension exists, apply slightly different logic on all of the other elements.
Any ideas would be greatly appreciated.
Thanks, Sean
Last edited by jparker; 05-16-2002 at 09:43 AM..
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LEARN ABOUT CENTOS
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)