1 files changed, 62 insertions, 0 deletions
diff --git a/tests/memory/memfd_create/t_get_seals.c b/tests/memory/memfd_create/t_get_seals.c
new file mode 100644
index 000000000..8babe34d2
--- /dev/null
+++ b/tests/memory/memfd_create/t_get_seals.c
@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 2016 Red Hat, Inc.
+ *
+ * This program is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation, either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be
+ * useful, but WITHOUT ANY WARRANTY; without even the implied
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ * PURPOSE.  See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see http://www.gnu.org/licenses/.
+ *
+ */
+
+#include <linux/fcntl.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+#define errExit(msg)    do { perror(msg); exit(EXIT_FAILURE); \
+} while (0)
+
+int main(int argc, char *argv[])
+{
+	int fd;
+	unsigned int seals;
+
+	if (argc != 2) {
+		fprintf(stderr, "%s /proc/PID/fd/FD\n", argv[0]);
+		exit(EXIT_FAILURE);
+	}
+
+	fd = open(argv[1], O_RDWR);
+	if (fd == -1)
+		errExit("open");
+
+	seals = fcntl(fd, F_GET_SEALS);
+	if (seals == -1)
+		errExit("fcntl");
+
+	printf("Existing seals:");
+	if (seals & F_SEAL_SEAL)
+		printf(" SEAL");
+	if (seals & F_SEAL_GROW)
+		printf(" GROW");
+	if (seals & F_SEAL_WRITE)
+		printf(" WRITE");
+	if (seals & F_SEAL_SHRINK)
+		printf(" SHRINK");
+	printf("\n");
+
+	/* Code to map the file and access the contents of the
+	   resulting mapping omitted */
+
+	exit(EXIT_SUCCESS);
+}
+