Module: File::Constants

Relationships & Source Files
Extension / Inclusion / Inheritance Descendants
Included In: ::File, ::IO
Defined in:	file.c

Overview

Constants provides file-related constants. All possible file constants are listed in the documentation but they may not all be present on your platform.

If the underlying platform doesn't define a constant the corresponding Ruby constant is not defined.

Your platform documentations (e.g. man open(2)) may describe more detailed information.

Constant Summary

APPEND =

append on each write

# File 'file.c', line 5962
```
INT2FIX(O_APPEND)
```
BINARY =

disable line code conversion

# File 'file.c', line 5984
```
INT2FIX(O_BINARY)
```
CREAT =

create file if it does not exist

# File 'file.c', line 5964
```
INT2FIX(O_CREAT)
```
DIRECT =

Try to minimize cache effects of the I/O to and from this file.

# File 'file.c', line 6007
```
INT2FIX(O_DIRECT)
```
DSYNC =

any write operation perform synchronously except some meta data

# File 'file.c', line 5991
```
INT2FIX(O_DSYNC)
```
EXCL =

error if CREAT and the file exists

# File 'file.c', line 5966
```
INT2FIX(O_EXCL)
```
LOCK_EX =

exclusive lock. see File#flock

# File 'file.c', line 6013
```
INT2FIX(LOCK_EX)
```
LOCK_NB =

non-blocking lock. used with LOCK_SH or LOCK_EX. see File#flock

# File 'file.c', line 6017
```
INT2FIX(LOCK_NB)
```
LOCK_SH =

shared lock. see File#flock

# File 'file.c', line 6011
```
INT2FIX(LOCK_SH)
```
LOCK_UN =

unlock. see File#flock

# File 'file.c', line 6015
```
INT2FIX(LOCK_UN)
```
NOATIME =

Linux

# File 'file.c', line 6003
```
INT2FIX(O_NOATIME)
```
NOCTTY =

not to make opened ::IO the controlling terminal device

# File 'file.c', line 5978
```
INT2FIX(O_NOCTTY)
```
NOFOLLOW =

FreeBSD, Linux

# File 'file.c', line 5999
```
INT2FIX(O_NOFOLLOW)
```
NONBLOCK =

do not block on open or for data to become available

# File 'file.c', line 5972
```
INT2FIX(O_NONBLOCK)
```
NULL =

Name of the null device

# File 'file.c', line 6020
```
rb_obj_freeze(rb_usascii_str_new2(null_device))
```
RDONLY =

open for reading only

# File 'file.c', line 5956
```
INT2FIX(O_RDONLY)
```
RDWR =

open for reading and writing

# File 'file.c', line 5960
```
INT2FIX(O_RDWR)
```
RSYNC =

any read operation perform synchronously. used with SYNC or DSYNC.

# File 'file.c', line 5995
```
INT2FIX(O_RSYNC)
```
SYNC =

any write operation perform synchronously

# File 'file.c', line 5987
```
INT2FIX(O_SYNC)
```
TRUNC =

truncate size to 0

# File 'file.c', line 5975
```
INT2FIX(O_TRUNC)
```
WRONLY =

open for writing only

# File 'file.c', line 5958
```
INT2FIX(O_WRONLY)
```