Rodrigo Faria Tavares wrote:
> Hello,
Hello,
> In shell-script I get a variable with command line:
>
> AUXIP=`cat $INPUTDB/postgresql.conf | grep "localhost"
> | awk '{print $3}' | head -n1`
UUOC:
AUXIP=`grep "localhost" "$INPUTDB/postgresql.conf" | awk '{print $3}' | head
-n1`
AWK can do regexps as well as grep:
AUXIP=`awk '/localhost/{print $3}' "$INPUTDB/postgresql.conf" | head -n1`
AWK can also exit early:
AUXIP=`awk '/localhost/{print $3;exit}' "$INPUTDB/postgresql.conf"`
> In C++, I use the functions read, write and others for
> manipulation files.
Aren't read and write low level file IO functions? Why would you use them
instead of cin and cout?
> And Pearl ?
Perhaps you mean Perl?
> After I open the file,
perldoc -f open
> i like to get a simple word
perldoc -f readline
perldoc -f split
> and store in a scalar variable.
perldoc perldata
> Or write after line 10 for example.
perldoc perlvar (look for the $. variable)
> And others.
perldoc perl
John
--
Perl isn't a toolbox, but a small machine shop where you can special-order
certain sorts of tools at low cost and in short order. -- Larry Wall
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