As per brother mifflin above, from the Perl Cookbook 1st ed, pp 518, 519...
hth,
ybiC
Use -t to test STDIN and STDOUT:
sub I_am_interactive {
return -t STDIN && -t STDOUT;
}
If you're on a POSIX system, test process groups:
sub I_am_interactive {
local *TTY; # local file handle
open(TTY, "/dev/tty") or die "can't open /dev/tty: $!";
my $tpgrp = tcgetpgrp(fileno(TTY));
my $pgrp = getpgrp();
close TTY;
return ($tpgrp == $pgrp);
}
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