fcntl.h File Reference

File control options. More...

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Macros
File creation flags for use in the oflag value to open() and openat().
#define	O_CLOEXEC   0x0001
#define	O_CREAT   0x0002
#define	O_DIRECTORY   0x0004
#define	O_EXCL   0x0008
#define	O_NOCTTY   0x0010
#define	O_NOFOLLOW   0x0020
#define	O_TRUNC   0x0040
#define	O_TTY_INIT   0x0080
File status flags for open(), openat(), and fcntl().
#define	O_APPEND   0x0100
#define	O_DSYNC   0x0200
#define	O_NONBLOCK   0x0400
#define	O_RSYNC   0x0800
#define	O_SYNC   0x0200
Mask for file access modes.
#define	O_ACCMODE   0xF000
File access modes for open(), openat(), and fcntl().
#define	O_EXEC   0x1000
#define	O_RDONLY   0x2000
#define	O_RDWR   0xA000
#define	O_SEARCH   0x4000
#define	O_WRONLY   0x8000

Detailed Description

File control options.

http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/fcntl.h.html

Macro Definition Documentation

O_CLOEXEC

#define O_CLOEXEC   0x0001

Close the file descriptor upon exec().

O_CREAT

#define O_CREAT   0x0002

Create file if it does not exist.

O_DIRECTORY

#define O_DIRECTORY   0x0004

Fail if file is a non-directory file.

O_EXCL

#define O_EXCL   0x0008

Exclusive use flag.

O_NOCTTY

#define O_NOCTTY   0x0010

Do not assign controlling terminal.

O_NOFOLLOW

#define O_NOFOLLOW   0x0020

Do not follow symbolic links.

O_TRUNC

#define O_TRUNC   0x0040

Truncate flag.

O_TTY_INIT

#define O_TTY_INIT   0x0080

termios structure provides conforming behavior.

O_APPEND

#define O_APPEND   0x0100

Set append mode.

O_DSYNC

#define O_DSYNC   0x0200

Write according to synchronized I/O data integrity completion.

O_NONBLOCK

#define O_NONBLOCK   0x0400

Non-blocking mode.

O_RSYNC

#define O_RSYNC   0x0800

Synchronized read I/O operations.

O_SYNC

#define O_SYNC   0x0200

Write according to synchronized I/O file integrity completion.

O_EXEC

#define O_EXEC   0x1000

Open for execute only (non-directory files).

O_RDONLY

#define O_RDONLY   0x2000

Open for reading only.

O_RDWR

#define O_RDWR   0xA000

Open for reading and writing.

O_SEARCH

#define O_SEARCH   0x4000

Open directory for search only.

O_WRONLY

#define O_WRONLY   0x8000

Open for writing only.