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#!/usr/bin/perl
#
# Check flock() feature
#
# This isn't a real test; it just checks to make sure we can call the method.
# It doesn't even check to make sure that the default behavior
# (LOCK_EX) is occurring. This is because I don't know how to write a good
# portable test for flocking. I checked the Perl core distribution,
# and found that Perl doesn't test flock either!
BEGIN {
eval { flock STDOUT, 0 };
if ($@ && $@ =~ /unimplemented/) {
print "1..0\n";
exit;
}
}
use Fcntl ':flock'; # This works at least back to 5.004_04
my $file = "tf$$.txt";
my ($o, $n);
my @a;
print "1..4\n";
my $N = 1;
use Tie::File;
print "ok $N\n"; $N++;
# 2-4 Who the heck knows?
open F, "> $file" or die $!;
close F;
$o = tie @a, 'Tie::File', $file, recsep => 'blah';
print $o ? "ok $N\n" : "not ok $N\n";
$N++;
print $o->flock() ? "ok $N\n" : "not ok $N\n";
$N++;
print $o->flock(LOCK_UN) ? "ok $N\n" : "not ok $N\n";
$N++;
END {
undef $o;
untie @a;
1 while unlink $file;
}
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