#ifndef FCNTL_H_
#define FCNTL_H_

#include <sys/types.h>

#define O_RDONLY   0x0000 /* open for reading only */
#define O_WRONLY   0x0001 /* open for writing only */
#define O_RDWR     0x0002 /* open for reading and writing */
#define O_ACCMODE  0x0003 /* mask for above modes */

#define O_NONBLOCK 0x00000004 /* no delay */
#define O_APPEND   0x00000008 /* set append mode */

#define O_SHLOCK   0x00000010 /* open with shared file lock */
#define O_EXLOCK   0x00000020 /* open with exclusive file lock */
#define O_ASYNC    0x00000040 /* signal pgrp when data ready */
#define O_FSYNC    O_SYNC     /* source compatibility: do not use */
#define O_NOFOLLOW 0x00000100 /* don't follow symlinks */
#define O_CREAT    0x00000200 /* create if nonexistant */
#define O_TRUNC    0x00000400 /* truncate to zero length */
#define O_EXCL     0x00000800 /* error if already exists */
#define O_RESOLVE_BENEATH                                                      \
	0x00001000 /* only for open(2), same value as FMARK                    \
	            */

#define O_EVTONLY                                                              \
	0x00008000 /* descriptor requested for event notifications only */

#define O_NOCTTY       0x00020000 /* don't assign controlling terminal */

#define O_DIRECTORY    0x00100000
#define O_SYMLINK      0x00200000 /* allow open of a symlink */

#define O_CLOEXEC      0x01000000 /* implicitly set FD_CLOEXEC */

#define O_NOFOLLOW_ANY 0x20000000 /* no symlinks allowed in path */

#define O_EXEC         0x40000000             /* open file for execute only */
#define O_SEARCH       (O_EXEC | O_DIRECTORY) /* open directory for search only */

#define AT_FDCWD       -2

#define AT_EACCESS     0x0010 /* Use effective ids in access check */
#define AT_SYMLINK_NOFOLLOW                                                    \
	0x0020                   /* Act on the symlink itself not the target */
#define AT_SYMLINK_FOLLOW 0x0040 /* Act on target of symlink */
#define AT_REMOVEDIR      0x0080 /* Path refers to directory */
#define AT_REALDEV                                                             \
	0x0200 /* Return real device inodes resides on for fstatat(2) */
#define AT_FDONLY                                                              \
	0x0400 /* Use only the fd and Ignore the path for fstatat(2) */
#define AT_SYMLINK_NOFOLLOW_ANY                                                \
	0x0800 /* Path should not contain any symlinks */

#define S_IRWXU  00700
#define S_IRUSR  00400
#define S_IWUSR  00200
#define S_IXUSR  00100
#define S_IRWXG  00070
#define S_IRGRP  00040
#define S_IWGRP  00020
#define S_IXGRP  00010
#define S_IRWXO  00007
#define S_IROTH  00004
#define S_IWOTH  00002
#define S_IXOTH  00001
#define S_ISUID  0004000
#define S_ISGID  0002000
#define S_ISVTX  0001000

#define R_OK     4
#define W_OK     2
#define X_OK     1
#define F_OK     0

#define F_RDLCK  0
#define F_WRLCK  1
#define F_SETLKW 7

struct flock {
	short l_type;
	short l_whence;
	off_t l_start;
	off_t l_len;
	pid_t l_pid;
};

struct flock64 {
	short l_type;
	short l_whence;
	off_t l_start;
	off_t l_len;
	pid_t l_pid;
};

extern int fcntl(int fd, int op, ...);

#endif