Perl: Print output at the same time on screen and file

Source: Internet
Author: User
Tags scalar

Perl Code implementation:

#!/usr/bin/perl use

Use warnings;
Use diagnostics;

Open (LOG, ' > ', ' log_file ') or die "Can ' t redirect stdout: $!";
Open (CMD, ' ls | ');
Open (STDERR, ' >& ', STDOUT) or die "Can ' t redirect STDERR: $!";
Open (STDERR, ' > ', ' log_file ') or die "Can ' t redirect STDERR: $!";
print "log_file\n";
while (<CMD>) {
    &lprint ($_)

sub Lprint {i
      ($line) = @_;
      Print LOG $line;  
      Print $line;

Close (cmd) or die "Close CMD failed: $!";

Exit (1);

Using Perl's Tee module:

#!/usr/bin/perl use

$tee = Io::tee->new (">> Log.txt", \*stdout); 
Print $tee "Log on". Scalar (localtime). " \ n ";

Open (STDOUT, "| Tee-ai Log.txt ");
Print "Log on". Scalar (localtime). " \ n ";
Close (STDOUT);

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