/*
 * Copyright 2002-2012 Haiku, Inc. All Rights Reserved.
 * Distributed under the terms of the MIT License.
 */
#ifndef _FCNTL_H
#define _FCNTL_H


#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>


/* commands that can be passed to fcntl() */
#define F_DUPFD                 0x0001          /* duplicate fd */
#define F_GETFD                 0x0002          /* get fd flags */
#define F_SETFD                 0x0004          /* set fd flags */
#define F_GETFL                 0x0008          /* get file status flags and access mode */
#define F_SETFL                 0x0010          /* set file status flags */
#define F_GETLK         0x0020          /* get locking information */
#define F_SETLK         0x0080          /* set locking information */
#define F_SETLKW        0x0100          /* as above, but waits if blocked */
#define F_DUPFD_CLOEXEC 0x0200          /* duplicate fd with close on exec set */
#define F_DUPFD_CLOFORK 0x0400          /* duplicate fd with close on fork set */

/* advisory locking types */
#define F_RDLCK         0x0040          /* read or shared lock */
#define F_UNLCK         0x0200          /* unlock */
#define F_WRLCK         0x0400          /* write or exclusive lock */

/* file descriptor flags for fcntl() */
#define FD_CLOEXEC              1                       /* close on exec */
#define FD_CLOFORK              2                       /* close on fork */

/* file access modes for open() */
#define O_RDONLY                0x0000          /* read only */
#define O_WRONLY                0x0001          /* write only */
#define O_RDWR                  0x0002          /* read and write */
#define O_ACCMODE       0x0003          /* mask to get the access modes above */
#define O_RWMASK                O_ACCMODE

/* flags for open() */
#define O_EXCL                  0x0100          /* exclusive creat */
#define O_CREAT                 0x0200          /* create and open file */
#define O_TRUNC                 0x0400          /* open with truncation */
#define O_NOCTTY                0x1000          /* don't make tty the controlling tty */
#define O_NOTRAVERSE    0x2000          /* do not traverse leaf link */

/* flags for open() and fcntl() */
#define O_CLOEXEC               0x00000040      /* close on exec */
#define O_NONBLOCK              0x00000080      /* non blocking io */
#define O_NDELAY                O_NONBLOCK
#define O_APPEND                0x00000800      /* to end of file */
#define O_SYNC                  0x00010000      /* write synchronized I/O file integrity */
#define O_RSYNC                 0x00020000      /* read synchronized I/O file integrity */
#define O_DSYNC                 0x00040000      /* write synchronized I/O data integrity */
#define O_NOFOLLOW              0x00080000      /* fail on symlinks */
#define O_DIRECT                0x00100000      /* do not use the file system cache if */
                                                                        /* possible */
#define O_NOCACHE               O_DIRECT
#define O_DIRECTORY             0x00200000      /* fail if not a directory */
#define O_CLOFORK               0x00400000      /* close on fork */

/* flags for the *at() functions */
#define AT_FDCWD                (-100)          /* CWD FD for the *at() functions */

#define AT_SYMLINK_NOFOLLOW     0x01    /* fstatat(), fchmodat(), fchownat(),
                                                                                utimensat() */
#define AT_SYMLINK_FOLLOW       0x02    /* linkat() */
#define AT_REMOVEDIR            0x04    /* unlinkat() */
#define AT_EACCESS                      0x08    /* faccessat() */

/* file advisory information, unused by Haiku */
#define POSIX_FADV_NORMAL               0       /* no advice */
#define POSIX_FADV_SEQUENTIAL   1       /* expect sequential access */
#define POSIX_FADV_RANDOM               2       /* expect access in a random order */
#define POSIX_FADV_WILLNEED             3       /* expect access in the near future */
#define POSIX_FADV_DONTNEED             4       /* expect no access in the near future */
#define POSIX_FADV_NOREUSE              5       /* expect access only once */

/* advisory file locking */

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


#ifdef __cplusplus
extern "C" {
#endif

extern int      creat(const char *path, mode_t mode);
extern int      open(const char *path, int openMode, ...);
        /* the third argument is the permissions of the created file when O_CREAT
           is passed in oflags */
extern int      openat(int fd, const char *path, int openMode, ...);

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

extern int      posix_fadvise(int fd, off_t offset, off_t len, int advice);
extern int      posix_fallocate(int fd, off_t offset, off_t len);

#ifdef __cplusplus
}
#endif

#endif  /* _FCNTL_H */