fcntl.h

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#ifndef _LINUX_FCNTL_H
#define _LINUX_FCNTL_H

/// open/fcntl - O_SYNC isn't implemented yet 
#define O_ACCMODE         0003
#define O_RDONLY            00
#define O_WRONLY            01
#define O_RDWR              02
#define O_CREAT           0100  ///< not fcntl 
#define O_EXCL            0200  ///< not fcntl 
#define O_NOCTTY          0400  ///< not fcntl 
#define O_TRUNC          01000  ///< not fcntl 
#define O_APPEND         02000
#define O_NONBLOCK       04000
#define O_NDELAY        O_NONBLOCK
#define O_SYNC          010000

#define F_DUPFD         0       ///< dup 
#define F_GETFD         1       ///< get f_flags 
#define F_SETFD         2       ///< set f_flags 
#define F_GETFL         3       ///< more flags (cloexec) 
#define F_SETFL         4
#define F_GETLK         5
#define F_SETLK         6
#define F_SETLKW        7

#define F_SETOWN        8       ///<  for sockets. 
#define F_GETOWN        9       ///<  for sockets. 

/// for F_[GET|SET]FL 
#define FD_CLOEXEC      1       ///< actually anything with low bit set goes 

#define F_RDLCK         0
#define F_WRLCK         1
#define F_UNLCK         2

/// For bsd flock () 
#define F_EXLCK         4       ///< or 3 
#define F_SHLCK         8       ///< or 4 

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

#endif

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