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mem: fix for memfd_create check

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This commit is contained in:
Wim Taymans 2017-11-27 11:58:33 +01:00
parent d7c26c4b59
commit 77838fd734
3 changed files with 5 additions and 63 deletions
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2
meson.build
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@ -117,7 +117,7 @@ if cc.has_function('mkstemp', prefix : '#include <stdlib.h>')
cdata.set('HAVE_MKSTEMP', 1) cdata.set('HAVE_MKSTEMP', 1)
endif endif
if cc.has_function('memfd_create', prefix : '#include <sys/mman.h>', args : [ '-D__USE_GNU' ]) if cc.has_function('memfd_create', prefix : '#include <sys/mman.h>', args : [ '-D_GNU_SOURCE' ])
cdata.set('HAVE_MEMFD_CREATE', 1) cdata.set('HAVE_MEMFD_CREATE', 1)
endif endif

4
src/pipewire/mem.c
View file

@ -21,6 +21,8 @@
#define _GNU_SOURCE #define _GNU_SOURCE
#endif #endif
#include "config.h"
#include <string.h> #include <string.h>
#include <stddef.h> #include <stddef.h>
#include <stdio.h> #include <stdio.h>
@ -34,6 +36,7 @@
#include <pipewire/log.h> #include <pipewire/log.h>
#include <pipewire/mem.h> #include <pipewire/mem.h>
#ifndef HAVE_MEMFD_CREATE
/* /*
* No glibc wrappers exist for memfd_create(2), so provide our own. * No glibc wrappers exist for memfd_create(2), so provide our own.
* *
@ -46,6 +49,7 @@ static inline int memfd_create(const char *name, unsigned int flags)
{ {
return syscall(SYS_memfd_create, name, flags); return syscall(SYS_memfd_create, name, flags);
} }
#endif
/* memfd_create(2) flags */ /* memfd_create(2) flags */

62
src/pipewire/memfd-wrappers.h
View file

@ -1,62 +0,0 @@
/* PipeWire
* Copyright (C) 2016 Wim Taymans <wim.taymans@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include <sys/syscall.h>
#include <fcntl.h>
#ifndef HAVE_MEMFD_CREATE
/*
* No glibc wrappers exist for memfd_create(2), so 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);
}
#endif
/* 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