12-12-2012
Compare two string in two separate file and delete some line of file
Hi all
i want to write program with shell script that able compare two file content and if one of lines of file have # at the first of string or nothing find same string in one of two file . remove the line in second file that have not the string in first file. for example:
file 1:config-file.conf
{
</sound>
snd sound card
snd1 sound card
<sound>
}
if user put # at first of string and save it , like: # snd sound card in config file
the program goes to second file for example
blacklist-sound.conf
{
blacklist snd sound card
blacklist snd1 sound card
}
and delete line blacklist snd sound card
or if user delet snd sound card string in config file , and then save it.program can remove blacklist snd sound card line
in blacklist -sound.conf
sorry for bad English
than x
---------- Post updated at 02:43 PM ---------- Previous update was at 02:30 PM ----------
I should mention that both are required to be written in one shell script .means both
put # and remove string method work whit gather.
than x
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LEARN ABOUT DEBIAN
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)