- seek $fd, 0, 0 or croak $!;
- truncate $fd, 0 or croak $!;
- print $fd $link or croak $!;
- seek $fd, 0, 0 or croak $!;
- $fd->flush == 0 or croak $!;
- }
- my $pid = open my $ho, '-|';
- defined $pid or croak $!;
- if (!$pid) {
- open STDIN, '<&', $fd or croak $!;
- exec qw/git-hash-object -w --stdin/ or croak $!;
+ defined($pid = open3($in, $out, '>&STDERR',
+ qw/git-hash-object -w --stdin/)) or croak $!;
+ print $in $link;
+ $in->flush == 0 or croak $!;
+ close $in or croak $!;
+ chomp($hash = do { local $/; <$out> });
+ close $out or croak $!;
+ waitpid $pid, 0;
+ $hash =~ /^$sha1$/o or die "not a sha1: $hash\n";