On Tuesday 05 November 2002 09:51 am, Chad is done writ:
> Is there a way in a bash script to trim the spaces from the front and
> end of a variable
> I have a script that contains the following variable definition
> BLOCKED_SERVICES="tcp,111,Sun RPC;\
> udp,111,Sun RPC;\
> tcp,443,Microsoft DS;\
> udp,443,Microsoft DS"
> I am wondering what the simplest method of extracting each of the three
> elements from each line of the variable. In otherwords, each line is a
> PROTOCOL, PORT_RANGE, and DESCRIPTION. I have tried a for loop in bash
First, you say that you have that as a variable. Why, and then why split it
up? If you need it split up, why not just have it as a seperate datafile?
Then you could change that, without changing the script, and you could
combine, or dice and chop it easily.
For example, with a datafile, you could then say
export BLOCKED_SERVICES=`cat myblocked`
but where you need the services broken out, youi would want to use awk:
# start of awk script
BEGIN {
FS = ","; # define the comma as the field seperator
}
{ print $1, $2, $3; # awk automagicaly splits the line into fields, as
# defined by the FS (default is whitespace)
}
# end of awk script
mark
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