Type:
Module
Constants:
FNM_NOESCAPE : INT2FIX(FNM_NOESCAPE)
FNM_PATHNAME : INT2FIX(FNM_PATHNAME)
FNM_DOTMATCH : INT2FIX(FNM_DOTMATCH)
FNM_CASEFOLD : INT2FIX(FNM_CASEFOLD)
FNM_EXTGLOB : INT2FIX(FNM_EXTGLOB)
FNM_SYSCASE : INT2FIX(FNM_SYSCASE)
RDONLY : INT2FIX(O_RDONLY)

open for reading only

WRONLY : INT2FIX(O_WRONLY)

open for writing only

RDWR : INT2FIX(O_RDWR)

open for reading and writing

APPEND : INT2FIX(O_APPEND)

append on each write

CREAT : INT2FIX(O_CREAT)

create file if it does not exist

EXCL : INT2FIX(O_EXCL)

error if CREAT and the file exists

NONBLOCK : INT2FIX(O_NONBLOCK)

do not block on open or for data to become available

TRUNC : INT2FIX(O_TRUNC)

truncate size to 0

NOCTTY : INT2FIX(O_NOCTTY)

not to make opened IO the controlling terminal device

BINARY : INT2FIX(O_BINARY)

disable line code conversion

SYNC : INT2FIX(O_SYNC)

any write operation perform synchronously

DSYNC : INT2FIX(O_DSYNC)

any write operation perform synchronously except some meta data

RSYNC : INT2FIX(O_RSYNC)

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

NOFOLLOW : INT2FIX(O_NOFOLLOW)

do not follow symlinks

NOATIME : INT2FIX(O_NOATIME)

do not change atime

DIRECT : INT2FIX(O_DIRECT)

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

LOCK_SH : INT2FIX(LOCK_SH)

shared lock. see File#flock

LOCK_EX : INT2FIX(LOCK_EX)

exclusive lock. see File#flock

LOCK_UN : INT2FIX(LOCK_UN)

unlock. see File#flock

LOCK_NB : INT2FIX(LOCK_NB)

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

NULL : rb_obj_freeze(rb_usascii_str_new2(null_device))

Name of the null device

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.