tmpfiles: use write(2) for the 'w' action

[thirdparty/systemd.git] / src / shared / missing.h

/*-*- 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 <unistd.h>
#include <linux/oom.h>

#ifdef HAVE_AUDIT
#include <libaudit.h>
#endif

#include "macro.h"

#ifdef ARCH_MIPS
#include <asm/sgidefs.h>
#endif

#ifndef RLIMIT_RTTIME
#define RLIMIT_RTTIME 15
#endif

#ifndef F_LINUX_SPECIFIC_BASE
#define F_LINUX_SPECIFIC_BASE 1024
#endif

#ifndef F_SETPIPE_SZ
#define F_SETPIPE_SZ (F_LINUX_SPECIFIC_BASE + 7)
#endif

#ifndef F_GETPIPE_SZ
#define F_GETPIPE_SZ (F_LINUX_SPECIFIC_BASE + 8)
#endif

#ifndef IP_FREEBIND
#define IP_FREEBIND 15
#endif

#ifndef OOM_SCORE_ADJ_MIN
#define OOM_SCORE_ADJ_MIN (-1000)
#endif

#ifndef OOM_SCORE_ADJ_MAX
#define OOM_SCORE_ADJ_MAX 1000
#endif

#ifndef AUDIT_SERVICE_START
#define AUDIT_SERVICE_START 1130 /* Service (daemon) start */
#endif

#ifndef AUDIT_SERVICE_STOP
#define AUDIT_SERVICE_STOP 1131 /* Service (daemon) stop */
#endif

#ifndef TIOCVHANGUP
#define TIOCVHANGUP 0x5437
#endif

#ifndef IP_TRANSPARENT
#define IP_TRANSPARENT 19
#endif

#if !HAVE_DECL_PIVOT_ROOT
static inline int pivot_root(const char *new_root, const char *put_old) {
        return syscall(SYS_pivot_root, new_root, put_old);
}
#endif

#ifdef __x86_64__
#  ifndef __NR_fanotify_init
#    define __NR_fanotify_init 300
#  endif
#  ifndef __NR_fanotify_mark
#    define __NR_fanotify_mark 301
#  endif
#elif defined _MIPS_SIM
#  if _MIPS_SIM == _MIPS_SIM_ABI32
#    ifndef __NR_fanotify_init
#      define __NR_fanotify_init 4336
#    endif
#    ifndef __NR_fanotify_mark
#      define __NR_fanotify_mark 4337
#    endif
#  elif _MIPS_SIM == _MIPS_SIM_NABI32
#    ifndef __NR_fanotify_init
#      define __NR_fanotify_init 6300
#    endif
#    ifndef __NR_fanotify_mark
#      define __NR_fanotify_mark 6301
#    endif
#  elif _MIPS_SIM == _MIPS_SIM_ABI64
#    ifndef __NR_fanotify_init
#      define __NR_fanotify_init 5295
#    endif
#    ifndef __NR_fanotify_mark
#      define __NR_fanotify_mark 5296
#    endif
#  endif
#else
#  ifndef __NR_fanotify_init
#    define __NR_fanotify_init 338
#  endif
#  ifndef __NR_fanotify_mark
#    define __NR_fanotify_mark 339
#  endif
#endif

#ifndef HAVE_FANOTIFY_INIT
static inline int fanotify_init(unsigned int flags, unsigned int event_f_flags) {
        return syscall(__NR_fanotify_init, flags, event_f_flags);
}
#endif

#ifndef HAVE_FANOTIFY_MARK
static inline int fanotify_mark(int fanotify_fd, unsigned int flags, uint64_t mask,
                                int dfd, const char *pathname) {
#if defined _MIPS_SIM && _MIPS_SIM == _MIPS_SIM_ABI32 || defined __powerpc__ && !defined __powerpc64__
        union {
                uint64_t _64;
                uint32_t _32[2];
        } _mask;
        _mask._64 = mask;

        return syscall(__NR_fanotify_mark, fanotify_fd, flags,
                       _mask._32[0], _mask._32[1], dfd, pathname);
#else
        return syscall(__NR_fanotify_mark, fanotify_fd, flags, mask, dfd, pathname);
#endif
}
#endif

#ifndef BTRFS_IOCTL_MAGIC
#define BTRFS_IOCTL_MAGIC 0x94
#endif

#ifndef BTRFS_PATH_NAME_MAX
#define BTRFS_PATH_NAME_MAX 4087
#endif

struct btrfs_ioctl_vol_args {
        int64_t fd;
        char name[BTRFS_PATH_NAME_MAX + 1];
};

#ifndef BTRFS_IOC_DEFRAG
#define BTRFS_IOC_DEFRAG _IOW(BTRFS_IOCTL_MAGIC, 2, struct btrfs_ioctl_vol_args)
#endif

#ifndef BTRFS_SUPER_MAGIC
#define BTRFS_SUPER_MAGIC 0x9123683E
#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 SCM_SECURITY
#define SCM_SECURITY 0x03
#endif

#ifndef MS_STRICTATIME
#define MS_STRICTATIME (1<<24)
#endif

#ifndef PR_SET_NO_NEW_PRIVS
#define PR_SET_NO_NEW_PRIVS 38
#endif

#ifndef PR_SET_CHILD_SUBREAPER
#define PR_SET_CHILD_SUBREAPER 36
#endif

#ifndef MAX_HANDLE_SZ
#define MAX_HANDLE_SZ 128
#endif

#ifdef __x86_64__
#  ifndef __NR_name_to_handle
#    define __NR_name_to_handle 303
#  endif
#else
#  ifndef __NR_name_to_handle
#    define __NR_name_to_handle 341
#  endif
#endif

#ifndef HAVE_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