Fcntl

java.lang.Object
- com.oracle.svm.core.posix.headers.Fcntl

```
public class Fcntl
extends Object
```
Definitions manually translated from the C header file fcntl.h.

Nested Class Summary

Nested Classes
Modifier and Type Class and Description

static interface Fcntl.flock

static class Fcntl.NoTransitions
Open file using the file handle.

Nested Classes
Modifier and Type	Class and Description
`static interface`	`Fcntl.flock`
`static class`	`Fcntl.NoTransitions` Open file using the file handle.

Constructor Summary

Constructors
Constructor and Description

Fcntl()

Constructors
Constructor and Description
`Fcntl()`

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`static int`	`AT_EACCESS()` Test access permitted for effective IDs, not real IDs.
`static int`	`AT_FDCWD()` Special value used to indicate the *at functions should use the current working directory.
`static int`	`AT_REMOVEDIR()` Remove directory instead of unlinking file.
`static int`	`AT_SYMLINK_FOLLOW()` Follow symbolic links.
`static int`	`AT_SYMLINK_NOFOLLOW()` Do not follow symbolic links.
`static int`	`creat(org.graalvm.nativeimage.c.type.CCharPointer pathname, int mode)` Create and open FILE, with mode MODE.
`static int`	`DN_ACCESS()` File accessed.
`static int`	`DN_ATTRIB()` File changed attributes.
`static int`	`DN_CREATE()` File created.
`static int`	`DN_DELETE()` File removed.
`static int`	`DN_MODIFY()` File modified.
`static int`	`DN_MULTISHOT()` Don't remove notifier.
`static int`	`DN_RENAME()` File renamed.
`static int`	`F_DUPFD()` Duplicate file descriptor.
`static short`	`F_EXLCK()`
`static int`	`F_GETFD()` Get file descriptor flags.
`static int`	`F_GETFL()` Get file status flags.
`static int`	`F_GETLEASE()` Enquire what lease is active.
`static int`	`F_GETLK()` Get record locking info.
`static int`	`F_GETOWN()` Set owner (process receiving SIGIO).
`static int`	`F_NOTIFY()` Request notifications on a directory.
`static short`	`F_RDLCK()` Read lock.
`static int`	`F_SETFD()` Set file descriptor flags.
`static int`	`F_SETFL()` Set file status flags.
`static int`	`F_SETLEASE()` Set a lease.
`static int`	`F_SETLK()` Set record locking info (non-blocking).
`static int`	`F_SETLKW()` Set record locking info (blocking).
`static int`	`F_SETOWN()` Get owner (process receiving SIGIO).
`static int`	`F_SETSIG()` Set number of signal to be sent.
`static short`	`F_SHLCK()`
`static short`	`F_UNLCK()` Remove lock.
`static short`	`F_WRLCK()` Write lock.
`static int`	`fallocate(int fd, int mode, org.graalvm.word.SignedWord offset, org.graalvm.word.SignedWord len)` Reserve storage for the data of the file associated with FD.
`static int`	`fcntl_no_transition(int fd, int cmd, int arg)`
`static int`	`fcntl(int fd, int cmd)` Do the file control operation described by CMD on FD.
`static int`	`fcntl(int fd, int cmd, Fcntl.flock arg)`
`static int`	`fcntl(int fd, int cmd, int arg)`
`static int`	`FD_CLOEXEC()` For F_[GET\|SET]FD.
`static int`	`LOCK_EX()` Exclusive lock.
`static int`	`LOCK_MAND()` This is a mandatory flock:
`static int`	`LOCK_NB()` Or'd with one of the above to prevent blocking.
`static int`	`LOCK_READ()` ...
`static int`	`LOCK_RW()` ...
`static int`	`LOCK_SH()` Shared lock.
`static int`	`LOCK_UN()` Remove lock.
`static int`	`LOCK_WRITE()` ...
`static int`	`O_ACCMODE()`
`static int`	`O_APPEND()`
`static int`	`O_ASYNC()`
`static int`	`O_CREAT()`
`static int`	`O_DIRECTORY()` Must be a directory.
`static int`	`O_DSYNC()` Synchronize data.
`static int`	`O_EXCL()`
`static int`	`O_FSYNC()`
`static int`	`O_NDELAY()`
`static int`	`O_NOATIME()` Do not set atime.
`static int`	`O_NOCTTY()`
`static int`	`O_NOFOLLOW()` Do not follow links.
`static int`	`O_NONBLOCK()`
`static int`	`O_RDONLY()`
`static int`	`O_RDWR()`
`static int`	`O_RSYNC()` Synchronize read operations.
`static int`	`O_SYNC()`
`static int`	`O_TRUNC()`
`static int`	`O_WRONLY()`
`static int`	`open(org.graalvm.nativeimage.c.type.CCharPointer pathname, int flags, int mode)` Open FILE and return a new file descriptor for it, or -1 on error.
`static int`	`openat(int fd, org.graalvm.nativeimage.c.type.CCharPointer pathname, int flags, int mode)` Similar to `open' but a relative path name is interpreted relative to the directory for which FD is a descriptor.
`static org.graalvm.word.SignedWord`	`readahead(int fd, org.graalvm.word.SignedWord offset, org.graalvm.word.UnsignedWord count)` Provide kernel hint to read ahead.
`static int`	`SPLICE_F_GIFT()` Pages passed in are a gift.
`static int`	`SPLICE_F_MORE()` Expect more data.
`static int`	`SPLICE_F_MOVE()` Move pages instead of copying.
`static int`	`SPLICE_F_NONBLOCK()` Don't block on the pipe splicing (but we may still block on the fd we splice from/to).
`static org.graalvm.word.SignedWord`	`splice(int fdin, org.graalvm.word.Pointer offin, int fdout, org.graalvm.word.Pointer offout, org.graalvm.word.SignedWord len, int flags)` Splice two files together.
`static int`	`SYNC_FILE_RANGE_WAIT_AFTER()` Wait upon writeout of all pages in the range after performing the write.
`static int`	`SYNC_FILE_RANGE_WAIT_BEFORE()` Wait upon writeout of all pages in the range before performing the write.
`static int`	`SYNC_FILE_RANGE_WRITE()` Initiate writeout of all those dirty pages in the range which are not presently under writeback.
`static int`	`sync_file_range(int fd, org.graalvm.word.SignedWord offset, org.graalvm.word.SignedWord count, int flags)` Selective file content synch'ing.
`static org.graalvm.word.SignedWord`	`tee(int fdin, int fdout, org.graalvm.word.SignedWord len, int flags)` In-kernel implementation of tee for pipe buffers.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail
- Fcntl
```
public Fcntl()
```

Method Detail

fcntl
```
public static int fcntl(int fd,
                        int cmd)
```
Do the file control operation described by CMD on FD. The remaining arguments are interpreted depending on CMD.

fcntl

public static int fcntl(int fd,
                        int cmd,
                        int arg)

fcntl_no_transition

public static int fcntl_no_transition(int fd,
                                      int cmd,
                                      int arg)

fcntl

public static int fcntl(int fd,
                        int cmd,
                        Fcntl.flock arg)

open
```
public static int open(org.graalvm.nativeimage.c.type.CCharPointer pathname,
                       int flags,
                       int mode)
```
Open FILE and return a new file descriptor for it, or -1 on error. OFLAG determines the type of access used. If O_CREAT is on OFLAG, the third argument is taken as a `mode_t', the mode of the created file.

openat
```
public static int openat(int fd,
                         org.graalvm.nativeimage.c.type.CCharPointer pathname,
                         int flags,
                         int mode)
```
Similar to `open' but a relative path name is interpreted relative to the directory for which FD is a descriptor. NOTE: some other `openat' implementation support additional functionality through this interface, especially using the O_XATTR flag. This is not yet supported here.

creat
```
public static int creat(org.graalvm.nativeimage.c.type.CCharPointer pathname,
                        int mode)
```
Create and open FILE, with mode MODE. This takes an `int' MODE argument because that is what `mode_t' will be widened to.

O_ACCMODE
```
public static int O_ACCMODE()
```

O_RDONLY
```
public static int O_RDONLY()
```

O_WRONLY
```
public static int O_WRONLY()
```

O_RDWR
```
public static int O_RDWR()
```

O_CREAT
```
public static int O_CREAT()
```

O_EXCL
```
public static int O_EXCL()
```

O_NOCTTY
```
public static int O_NOCTTY()
```

O_TRUNC
```
public static int O_TRUNC()
```

O_APPEND
```
public static int O_APPEND()
```

O_NONBLOCK
```
public static int O_NONBLOCK()
```

O_NDELAY
```
public static int O_NDELAY()
```

O_SYNC
```
public static int O_SYNC()
```

O_FSYNC
```
public static int O_FSYNC()
```

O_ASYNC
```
public static int O_ASYNC()
```

F_GETLK
```
public static int F_GETLK()
```
Get record locking info.

F_SETLK
```
public static int F_SETLK()
```
Set record locking info (non-blocking).

F_SETLKW
```
public static int F_SETLKW()
```
Set record locking info (blocking).

O_DIRECTORY
```
public static int O_DIRECTORY()
```
Must be a directory.

O_NOFOLLOW
```
public static int O_NOFOLLOW()
```
Do not follow links.

O_NOATIME
```
public static int O_NOATIME()
```
Do not set atime.

O_DSYNC
```
public static int O_DSYNC()
```
Synchronize data.

O_RSYNC
```
public static int O_RSYNC()
```
Synchronize read operations.

F_DUPFD
```
public static int F_DUPFD()
```
Duplicate file descriptor.

F_GETFD
```
public static int F_GETFD()
```
Get file descriptor flags.

F_SETFD
```
public static int F_SETFD()
```
Set file descriptor flags.

F_GETFL
```
public static int F_GETFL()
```
Get file status flags.

F_SETFL
```
public static int F_SETFL()
```
Set file status flags.

F_SETOWN
```
public static int F_SETOWN()
```
Get owner (process receiving SIGIO).

F_GETOWN
```
public static int F_GETOWN()
```
Set owner (process receiving SIGIO).

F_SETSIG
```
public static int F_SETSIG()
```
Set number of signal to be sent.

F_SETLEASE
```
public static int F_SETLEASE()
```
Set a lease.

F_GETLEASE
```
public static int F_GETLEASE()
```
Enquire what lease is active.

F_NOTIFY
```
public static int F_NOTIFY()
```
Request notifications on a directory.

FD_CLOEXEC
```
public static int FD_CLOEXEC()
```
For F_[GET|SET]FD.

F_RDLCK
```
public static short F_RDLCK()
```
Read lock.

F_WRLCK
```
public static short F_WRLCK()
```
Write lock.

F_UNLCK
```
public static short F_UNLCK()
```
Remove lock.

F_EXLCK
```
public static short F_EXLCK()
```

F_SHLCK
```
public static short F_SHLCK()
```

LOCK_SH
```
public static int LOCK_SH()
```
Shared lock.

LOCK_EX
```
public static int LOCK_EX()
```
Exclusive lock.

LOCK_NB
```
public static int LOCK_NB()
```
Or'd with one of the above to prevent blocking.

LOCK_UN
```
public static int LOCK_UN()
```
Remove lock.

LOCK_MAND
```
public static int LOCK_MAND()
```
This is a mandatory flock:

LOCK_READ
```
public static int LOCK_READ()
```
... which allows concurrent read operations.

LOCK_WRITE
```
public static int LOCK_WRITE()
```
... which allows concurrent write operations.

LOCK_RW
```
public static int LOCK_RW()
```
... Which allows concurrent read & write operations.

DN_ACCESS
```
public static int DN_ACCESS()
```
File accessed.

DN_MODIFY
```
public static int DN_MODIFY()
```
File modified.

DN_CREATE
```
public static int DN_CREATE()
```
File created.

DN_DELETE
```
public static int DN_DELETE()
```
File removed.

DN_RENAME
```
public static int DN_RENAME()
```
File renamed.

DN_ATTRIB
```
public static int DN_ATTRIB()
```
File changed attributes.

DN_MULTISHOT
```
public static int DN_MULTISHOT()
```
Don't remove notifier.

SYNC_FILE_RANGE_WAIT_BEFORE
```
public static int SYNC_FILE_RANGE_WAIT_BEFORE()
```
Wait upon writeout of all pages in the range before performing the write.

SYNC_FILE_RANGE_WRITE
```
public static int SYNC_FILE_RANGE_WRITE()
```
Initiate writeout of all those dirty pages in the range which are not presently under writeback.

SYNC_FILE_RANGE_WAIT_AFTER
```
public static int SYNC_FILE_RANGE_WAIT_AFTER()
```
Wait upon writeout of all pages in the range after performing the write.

SPLICE_F_MOVE
```
public static int SPLICE_F_MOVE()
```
Move pages instead of copying.

SPLICE_F_NONBLOCK
```
public static int SPLICE_F_NONBLOCK()
```
Don't block on the pipe splicing (but we may still block on the fd we splice from/to).

SPLICE_F_MORE
```
public static int SPLICE_F_MORE()
```
Expect more data.

SPLICE_F_GIFT
```
public static int SPLICE_F_GIFT()
```
Pages passed in are a gift.

AT_FDCWD
```
public static int AT_FDCWD()
```
Special value used to indicate the *at functions should use the current working directory.

AT_SYMLINK_NOFOLLOW
```
public static int AT_SYMLINK_NOFOLLOW()
```
Do not follow symbolic links.

AT_REMOVEDIR
```
public static int AT_REMOVEDIR()
```
Remove directory instead of unlinking file.

AT_SYMLINK_FOLLOW
```
public static int AT_SYMLINK_FOLLOW()
```
Follow symbolic links.

AT_EACCESS
```
public static int AT_EACCESS()
```
Test access permitted for effective IDs, not real IDs.

readahead

public static org.graalvm.word.SignedWord readahead(int fd,
                                                    org.graalvm.word.SignedWord offset,
                                                    org.graalvm.word.UnsignedWord count)

Provide kernel hint to read ahead.

sync_file_range

public static int sync_file_range(int fd,
                                  org.graalvm.word.SignedWord offset,
                                  org.graalvm.word.SignedWord count,
                                  int flags)

Selective file content synch'ing.

splice

public static org.graalvm.word.SignedWord splice(int fdin,
                                                 org.graalvm.word.Pointer offin,
                                                 int fdout,
                                                 org.graalvm.word.Pointer offout,
                                                 org.graalvm.word.SignedWord len,
                                                 int flags)

Splice two files together.

tee

public static org.graalvm.word.SignedWord tee(int fdin,
                                              int fdout,
                                              org.graalvm.word.SignedWord len,
                                              int flags)

In-kernel implementation of tee for pipe buffers.

fallocate

public static int fallocate(int fd,
                            int mode,
                            org.graalvm.word.SignedWord offset,
                            org.graalvm.word.SignedWord len)

Reserve storage for the data of the file associated with FD.

Class Fcntl

Nested Class Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

Fcntl

Method Detail

fcntl

fcntl

fcntl_no_transition

fcntl

open

openat

creat

O_ACCMODE

O_RDONLY

O_WRONLY

O_RDWR

O_CREAT

O_EXCL

O_NOCTTY

O_TRUNC

O_APPEND

O_NONBLOCK

O_NDELAY

O_SYNC

O_FSYNC

O_ASYNC

F_GETLK

F_SETLK

F_SETLKW

O_DIRECTORY

O_NOFOLLOW

O_NOATIME

O_DSYNC

O_RSYNC

F_DUPFD

F_GETFD

F_SETFD

F_GETFL

F_SETFL

F_SETOWN

F_GETOWN

F_SETSIG

F_SETLEASE

F_GETLEASE

F_NOTIFY

FD_CLOEXEC

F_RDLCK

F_WRLCK

F_UNLCK

F_EXLCK

F_SHLCK

LOCK_SH

LOCK_EX

LOCK_NB

LOCK_UN

LOCK_MAND

LOCK_READ

LOCK_WRITE

LOCK_RW

DN_ACCESS

DN_MODIFY

DN_CREATE

DN_DELETE

DN_RENAME

DN_ATTRIB

DN_MULTISHOT

SYNC_FILE_RANGE_WAIT_BEFORE

SYNC_FILE_RANGE_WRITE

SYNC_FILE_RANGE_WAIT_AFTER

SPLICE_F_MOVE

SPLICE_F_NONBLOCK

SPLICE_F_MORE

SPLICE_F_GIFT

AT_FDCWD

AT_SYMLINK_NOFOLLOW

AT_REMOVEDIR

AT_SYMLINK_FOLLOW