+sub tempfile {
+ my ($perm, %opts) = @_;
+
+ # default permissions are stricter than with file_set_contents
+ $perm = 0600 if !defined($perm);
+
+ my $dir = $opts{dir} // '/tmp';
+ my $mode = $opts{mode} // O_RDWR;
+ $mode |= O_EXCL if !$opts{allow_links};
+
+ my $fh = IO::File->new($dir, $mode | O_TMPFILE, $perm)
+ or die "failed to create tempfile: $!\n";
+ return $fh;
+}
+
+sub tempfile_contents {
+ my ($data, $perm, %opts) = @_;
+
+ my $fh = tempfile($perm, %opts);
+ eval {
+ die "unable to write to tempfile: $!\n" if !print {$fh} $data;
+ die "unable to flush to tempfile: $!\n" if !defined($fh->flush());
+ };
+ if (my $err = $@) {
+ close $fh;
+ die $err;
+ }
+
+ return ("/proc/$$/fd/".$fh->fileno, $fh);
+}
+