Module: File::Constants
- Included in:
- IO
- Defined in:
- file.c,
file.c
Overview
File::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 collapse
- RDONLY =
open for reading only
INT2FIX(O_RDONLY)
- WRONLY =
open for writing only
INT2FIX(O_WRONLY)
- RDWR =
open for reading and writing
INT2FIX(O_RDWR)
- APPEND =
append on each write
INT2FIX(O_APPEND)
- CREAT =
create file if it does not exist
INT2FIX(O_CREAT)
- EXCL =
error if CREAT and the file exists
INT2FIX(O_EXCL)
- NONBLOCK =
do not block on open or for data to become available
INT2FIX(O_NONBLOCK)
- TRUNC =
truncate size to 0
INT2FIX(O_TRUNC)
- NOCTTY =
not to make opened IO the controlling terminal device
INT2FIX(O_NOCTTY)
- BINARY =
disable line code conversion
INT2FIX(O_BINARY)
- SYNC =
any write operation perform synchronously
INT2FIX(O_SYNC)
- DSYNC =
any write operation perform synchronously except some meta data
INT2FIX(O_DSYNC)
- RSYNC =
any read operation perform synchronously. used with SYNC or DSYNC.
INT2FIX(O_RSYNC)
- NOFOLLOW =
FreeBSD, Linux
INT2FIX(O_NOFOLLOW)
- NOATIME =
Linux
INT2FIX(O_NOATIME)
- DIRECT =
Try to minimize cache effects of the I/O to and from this file.
INT2FIX(O_DIRECT)
- LOCK_SH =
shared lock. see File#flock
INT2FIX(LOCK_SH)
- LOCK_EX =
exclusive lock. see File#flock
INT2FIX(LOCK_EX)
- LOCK_UN =
unlock. see File#flock
INT2FIX(LOCK_UN)
- LOCK_NB =
non-blocking lock. used with LOCK_SH or LOCK_EX. see File#flock
INT2FIX(LOCK_NB)
- NULL =
Name of the null device
rb_obj_freeze(rb_usascii_str_new2(null_device))