Buffering piped output of a script to another script...

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Is it possible to buffer the data coming in ($_) based on size rather than
waiting for a newline?

Here is a test scenario:

#script1.pl
while(1){
print "Sent: " . localtime() . "\n";
}

------------------------------

#script2.pl:
print "Received: $_";

Running the above scripts using: "perl script1.pl | perl -n script2.pl"
works fine (as expected). However I wonder if it is possible to remove
the "\n" from the print statement in script1.pl and let script2.pl handle
the buffering, by this I mean process the print "Received: $_"; line only
when $_ contains x number of characters, bytes, etc...

Note: Target platform is Win32.

Thanks,
Brett Carroll
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Is it possible to buffer the data coming
in ($_) based on size rather than waiting for a newline?



Here is a test scenario:



#script1.pl

while(1){

print "Sent: " . localtime()
.. "\n";

}



------------------------------



#script2.pl:

print "Received: $_";



Running the above scripts using: "perl
script1.pl | perl -n script2.pl" works fine (as expected).  However
I wonder if it is possible to remove the "\n" from the print
statement in script1.pl and let script2.pl handle the buffering, by this
I mean process the print "Received: $_"; line only when $_ contains
x number of characters, bytes, etc...



Note: Target platform is Win32.



Thanks,

Brett Carroll
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Re: Buffering piped output of a script to another script...

Brett.Carroll@bpd.treas.gov wrote:
>
> Is it possible to buffer the data coming in ($_) based on size rather
> than waiting for a newline?
>
> Here is a test scenario:
>
> #script1.pl
> while(1){
> print "Sent: " . localtime() . "\n";
> }

$| = 1;
while (1) {
print "Sent: " . localtime ();
sleep 1;
}

> ------------------------------
>
> #script2.pl:
> print "Received: $_";

This might work for you, but you really need to know where to put the
newlines other than checking for Sent:

print "Received: ";
while (1) {
my $buf;
sysread STDIN, $buf, 128;
print $buf;
print "\nReceived: " if $buf =~ /^Sent/;
}

> Running the above scripts using: "perl script1.pl | perl -n script2.pl"
> works fine (as expected). However I wonder if it is possible to remove
> the "\n" from the print statement in script1.pl and let script2.pl
> handle the buffering, by this I mean process the print "Received: $_";
> line only when $_ contains x number of characters, bytes, etc...
>
> Note: Target platform is Win32.
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