src/shared: refactor shared code

Signed-off-by: Anthony G. Basile <blueness@gentoo.org>

1 files changed, 114 insertions, 0 deletions

diff --git a/src/shared/missing.h b/src/shared/missing.h
new file mode 100644
index 0000000000..471a81120c
--- /dev/null
+++ b/src/shared/missing.h
@@ -0,0 +1,114 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd 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.
+
+  systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+/* Missing glibc definitions to access certain kernel APIs */
+
+#include <sys/resource.h>
+#include <sys/syscall.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <linux/oom.h>
+
+#include "macro.h"
+#include "config.h"
+
+#ifdef ARCH_MIPS
+#include <asm/sgidefs.h>
+#endif
+
+#ifndef RLIMIT_RTTIME
+#define RLIMIT_RTTIME 15
+#endif
+
+#ifndef BTRFS_IOCTL_MAGIC
+#define BTRFS_IOCTL_MAGIC 0x94
+#endif
+
+#ifndef BTRFS_PATH_NAME_MAX
+#define BTRFS_PATH_NAME_MAX 4087
+#endif
+
+#ifndef HAVE_LINUX_BTRFS_H
+struct btrfs_ioctl_vol_args {
+        int64_t fd;
+        char name[BTRFS_PATH_NAME_MAX + 1];
+};
+#endif
+
+#ifndef BTRFS_IOC_DEVICES_READY
+#define BTRFS_IOC_DEVICES_READY _IOR(BTRFS_IOCTL_MAGIC, 39, \
+                                 struct btrfs_ioctl_vol_args)
+#endif
+
+#ifndef MS_MOVE
+#define MS_MOVE 8192
+#endif
+
+#ifndef MS_PRIVATE
+#define MS_PRIVATE  (1 << 18)
+#endif
+
+#if !HAVE_DECL_GETTID
+static inline pid_t gettid(void) {
+        return (pid_t) syscall(SYS_gettid);
+}
+#endif
+
+#ifndef MS_PRIVATE
+#define MS_PRIVATE  (1 << 18)
+#endif
+
+#ifndef MS_REC
+#define MS_REC 16384
+#endif
+
+#ifndef MAX_HANDLE_SZ
+#define MAX_HANDLE_SZ 128
+#endif
+
+#ifndef __NR_name_to_handle_at
+#  if defined(__x86_64__)
+#    define __NR_name_to_handle_at 303
+#  elif defined(__i386__)
+#    define __NR_name_to_handle_at 341
+#  elif defined(__arm__)
+#    define __NR_name_to_handle_at 370
+#  elif defined(__powerpc__)
+#    define __NR_name_to_handle_at 345
+#  else
+#    error "__NR_name_to_handle_at is not defined"
+#  endif
+#endif
+
+#if !HAVE_DECL_NAME_TO_HANDLE_AT
+struct file_handle {
+        unsigned int handle_bytes;
+        int handle_type;
+        unsigned char f_handle[0];
+};
+
+static inline int name_to_handle_at(int fd, const char *name, struct file_handle *handle, int *mnt_id, int flags) {
+        return syscall(__NR_name_to_handle_at, fd, name, handle, mnt_id, flags);
+}
+#endif