1 files changed, 113 insertions, 0 deletions
diff --git a/tools/regression/priv/priv_vfs_generation.c b/tools/regression/priv/priv_vfs_generation.c
new file mode 100644
index 0000000..2ccca79
--- /dev/null
+++ b/tools/regression/priv/priv_vfs_generation.c
@@ -0,0 +1,113 @@
+/*-
+ * Copyright (c) 2006 nCircle Network Security, Inc.
+ * All rights reserved.
+ *
+ * This software was developed by Robert N. M. Watson for the TrustedBSD
+ * Project under contract to nCircle Network Security, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR, NCIRCLE NETWORK SECURITY,
+ * INC., OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+ * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+/*
+ * Confirm that a generation number isn't returned by stat() when not running
+ * with privilege.  In order to differentiate between a generation of 0 and
+ * a generation not being returned, we have to create a temporary file known
+ * to have a non-0 generation.  We try up to 10 times, and then give up,
+ * which is non-ideal, but better than not testing for a problem.
+ */
+
+#include <sys/stat.h>
+
+#include <err.h>
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "main.h"
+
+/*
+ * Can't use setup_file() since the resulting file needs to have specific
+ * properties.
+ */
+void
+priv_vfs_generation(void)
+{
+	char fpath[1024] = "/tmp/priv.XXXXXXXXXX";
+	struct stat sb;
+	int fd, i;
+
+	assert_root();
+
+	/*
+	 * Create a file with a non-0 generation number.  Try ten times,
+	 * which gives a high chance of succeeds, fail otherwise.  Not ideal,
+	 * since we can't distinguish the file having a generation of 0 from
+	 * not being able to query it for access control reasons.  The perils
+	 * of an API that changes behavior based on lack of privilege rather
+	 * than failing...
+	 */
+	for (i = 0; i < 10; i++) {
+		fd = mkstemp(fpath);
+		if (fd < 0)
+			err(-1, "mkstemp");
+		if (fstat(fd, &sb) < 0) {
+			warn("fstat(%s)", fpath);
+			close(fd);
+			goto out;
+		}
+		if (sb.st_gen != 0)
+			break;
+		close(fd);
+		(void)unlink(fpath);
+		strcpy(fpath, "/tmp/generation.XXXXXXXXXX");
+		fd = -1;
+	}
+	if (fd == -1)
+		errx(-1,
+		    "could not create file with non-0 generation as root");
+	close(fd);
+
+	/*
+	 * We've already tested that fstat() works, but try stat() to be
+	 * consistent between privileged and unprivileged tests.
+	 */
+	if (stat(fpath, &sb) < 0) {
+		warn("stat(%s) as root", fpath);
+		goto out;
+	}
+
+	set_euid(UID_OTHER);
+
+	if (stat(fpath, &sb) < 0) {
+		warn("stat(%s) as !root", fpath);
+		goto out;
+	}
+
+	if (sb.st_gen != 0)
+		warn("stat(%s) returned generation as !root", fpath);
+
+out:
+	(void)seteuid(UID_ROOT);
+	(void)unlink(fpath);
+}