+#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
+#define AT_NO_AUTOMOUNT 0x800
+#define AT_EMPTY_PATH 0x1000
+#define AT_STATX_SYNC_TYPE 0x6000
+#define AT_STATX_SYNC_AS_STAT 0x0000
+#define AT_STATX_FORCE_SYNC 0x2000
+#define AT_STATX_DONT_SYNC 0x4000
+#define AT_RECURSIVE 0x8000
+
+#define FAPPEND O_APPEND
+#define FFSYNC O_SYNC
+#define FASYNC O_ASYNC
+#define FNONBLOCK O_NONBLOCK
+#define FNDELAY O_NDELAY
+
+#define F_OK 0
+#define R_OK 4
+#define W_OK 2
+#define X_OK 1
+#define F_ULOCK 0
+#define F_LOCK 1
+#define F_TLOCK 2
+#define F_TEST 3
+
+#define F_SETLEASE 1024
+#define F_GETLEASE 1025
+#define F_NOTIFY 1026
+#define F_CANCELLK 1029
+#define F_SETPIPE_SZ 1031
+#define F_GETPIPE_SZ 1032
+#define F_ADD_SEALS 1033
+#define F_GET_SEALS 1034
+
+#define F_SEAL_SEAL 0x0001
+#define F_SEAL_SHRINK 0x0002
+#define F_SEAL_GROW 0x0004
+#define F_SEAL_WRITE 0x0008
+#define F_SEAL_FUTURE_WRITE 0x0010
+
+#define F_GET_RW_HINT 1035
+#define F_SET_RW_HINT 1036
+#define F_GET_FILE_RW_HINT 1037
+#define F_SET_FILE_RW_HINT 1038
+
+#define RWF_WRITE_LIFE_NOT_SET 0
+#define RWH_WRITE_LIFE_NONE 1
+#define RWH_WRITE_LIFE_SHORT 2
+#define RWH_WRITE_LIFE_MEDIUM 3
+#define RWH_WRITE_LIFE_LONG 4
+#define RWH_WRITE_LIFE_EXTREME 5
+
+#define DN_ACCESS 0x00000001
+#define DN_MODIFY 0x00000002
+#define DN_CREATE 0x00000004
+#define DN_DELETE 0x00000008
+#define DN_RENAME 0x00000010
+#define DN_ATTRIB 0x00000020
+#define DN_MULTISHOT 0x80000000
+
+int lockf(int, int, off_t);
+#endif
+
+#if defined(_GNU_SOURCE)
+#define F_OWNER_TID 0
+#define F_OWNER_PID 1
+#define F_OWNER_PGRP 2
+#define F_OWNER_GID 2
+struct file_handle {
+ unsigned handle_bytes;
+ int handle_type;
+ unsigned char f_handle[];
+};
+struct f_owner_ex {
+ int type;
+ pid_t pid;
+};
+#define FALLOC_FL_KEEP_SIZE 1
+#define FALLOC_FL_PUNCH_HOLE 2
+#define MAX_HANDLE_SZ 128
+#define SYNC_FILE_RANGE_WAIT_BEFORE 1
+#define SYNC_FILE_RANGE_WRITE 2
+#define SYNC_FILE_RANGE_WAIT_AFTER 4
+#define SPLICE_F_MOVE 1
+#define SPLICE_F_NONBLOCK 2
+#define SPLICE_F_MORE 4
+#define SPLICE_F_GIFT 8
+int fallocate(int, int, off_t, off_t);
+#define fallocate64 fallocate
+int name_to_handle_at(int, const char *, struct file_handle *, int *, int);
+int open_by_handle_at(int, struct file_handle *, int);
+ssize_t readahead(int, off_t, size_t);
+int sync_file_range(int, off_t, off_t, unsigned);
+ssize_t vmsplice(int, const struct iovec *, size_t, unsigned);
+ssize_t splice(int, off_t *, int, off_t *, size_t, unsigned);
+ssize_t tee(int, int, size_t, unsigned);
+#define loff_t off_t
+#endif
+
+#if defined(_LARGEFILE64_SOURCE) || defined(_GNU_SOURCE)
+#define F_GETLK64 F_GETLK
+#define F_SETLK64 F_SETLK
+#define F_SETLKW64 F_SETLKW
+#define flock64 flock
+#define open64 open
+#define openat64 openat
+#define creat64 creat
+#define lockf64 lockf
+#define posix_fadvise64 posix_fadvise
+#define posix_fallocate64 posix_fallocate
+#define off64_t off_t
+#endif
+