1 files changed, 69 insertions, 0 deletions
diff --git a/src/pulsecore/memfd-wrappers.h b/src/pulsecore/memfd-wrappers.h
new file mode 100644
index 0000000..c7aadfd
--- /dev/null
+++ b/src/pulsecore/memfd-wrappers.h
@@ -0,0 +1,69 @@
+#ifndef foopulsememfdwrappershfoo
+#define foopulsememfdwrappershfoo
+
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2016 Ahmed S. Darwish <darwish.07@gmail.com>
+
+  PulseAudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License as
+  published by the Free Software Foundation; either version 2.1 of the
+  License, or (at your option) any later version.
+
+  PulseAudio 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
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
+***/
+
+#if defined(HAVE_MEMFD) && !defined(HAVE_MEMFD_CREATE)
+
+#include <sys/syscall.h>
+#include <fcntl.h>
+
+/*
+ * Before glibc version 2.27 there was no wrapper for memfd_create(2),
+ * so we have to provide our own.
+ *
+ * Also define memfd fcntl sealing macros. While they are already
+ * defined in the kernel header file <linux/fcntl.h>, that file as
+ * a whole conflicts with the original glibc header <fnctl.h>.
+ */
+
+static inline int memfd_create(const char *name, unsigned int flags) {
+    return syscall(SYS_memfd_create, name, flags);
+}
+
+/* memfd_create(2) flags */
+
+#ifndef MFD_CLOEXEC
+#define MFD_CLOEXEC       0x0001U
+#endif
+
+#ifndef MFD_ALLOW_SEALING
+#define MFD_ALLOW_SEALING 0x0002U
+#endif
+
+/* fcntl() seals-related flags */
+
+#ifndef F_LINUX_SPECIFIC_BASE
+#define F_LINUX_SPECIFIC_BASE 1024
+#endif
+
+#ifndef F_ADD_SEALS
+#define F_ADD_SEALS (F_LINUX_SPECIFIC_BASE + 9)
+#define F_GET_SEALS (F_LINUX_SPECIFIC_BASE + 10)
+
+#define F_SEAL_SEAL     0x0001  /* prevent further seals from being set */
+#define F_SEAL_SHRINK   0x0002  /* prevent file from shrinking */
+#define F_SEAL_GROW     0x0004  /* prevent file from growing */
+#define F_SEAL_WRITE    0x0008  /* prevent writes */
+#endif
+
+#endif /* HAVE_MEMFD && !HAVE_MEMFD_CREATE */
+
+#endif