Beefy Boxes and Bandwidth Generously Provided by pair Networks
laziness, impatience, and hubris
 
PerlMonks  

How do I print to more than one file at once?

by faq_monk (Initiate)
on Oct 13, 1999 at 03:42 UTC ( #810=perlfaq nodetype: print w/ replies, xml ) Need Help??

Current Perl documentation can be found at perldoc.perl.org.

Here is our local, out-dated (pre-5.6) version:

If you only have to do this once, you can do this:

    for $fh (FH1, FH2, FH3) { print $fh "whatever\n" }

To connect up to one filehandle to several output filehandles, it's easiest to use the tee(1) program if you have it, and let it take care of the multiplexing:

    open (FH, "| tee file1 file2 file3");

Or even:

    # make STDOUT go to three files, plus original STDOUT
    open (STDOUT, "| tee file1 file2 file3") or die "Teeing off: $!\n";
    print "whatever\n"                       or die "Writing: $!\n";
    close(STDOUT)                            or die "Closing: $!\n";

Otherwise you'll have to write your own multiplexing print function -- or your own tee program -- or use Tom Christiansen's, at http://www.perl.com/CPAN/authors/id/TOMC/scripts/tct.gz, which is written in Perl and offers much greater functionality than the stock version.

Log In?
Username:
Password:

What's my password?
Create A New User
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others drinking their drinks and smoking their pipes about the Monastery: (12)
As of 2014-09-19 05:00 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    How do you remember the number of days in each month?











    Results (129 votes), past polls