File::Constants

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.

Constants

APPEND: append on each write
BINARY: disable line code conversion
CREAT: create file if it does not exist
DIRECT: Try to minimize cache effects of the I/O to and from this file.
DSYNC: any write operation perform synchronously except some meta data
EXCL: error if CREAT and the file exists
FNM_CASEFOLD: Makes File.fnmatch patterns case insensitive (but not Dir.glob patterns).
FNM_DOTMATCH: The '*' wildcard matches filenames starting with "." in File.fnmatch and Dir.glob patterns
FNM_EXTGLOB: Allows file globbing through "{a,b}" in File.fnmatch patterns.
FNM_NOESCAPE: Disables escapes in File.fnmatch and Dir.glob patterns
FNM_PATHNAME: Wildcards in File.fnmatch and Dir.glob patterns do not match directory separators
FNM_SHORTNAME: Makes patterns to match short names if existing. Valid only on Microsoft Windows.
FNM_SYSCASE: System default case insensitiveness, equals to FNM_CASEFOLD or 0.
LOCK_EX: exclusive lock. see File#flock
LOCK_NB: non-blocking lock. used with LOCK_SH or LOCK_EX. see File#flock
LOCK_SH: shared lock. see File#flock
LOCK_UN: unlock. see File#flock
NOATIME: do not change atime
NOCTTY: not to make opened IO the controlling terminal device
NOFOLLOW: do not follow symlinks
NONBLOCK: do not block on open or for data to become available
NULL: Name of the null device
RDONLY: open for reading only
RDWR: open for reading and writing
RSYNC: any read operation perform synchronously. used with SYNC or DSYNC.
SHARE_DELETE: can delete opened file
SYNC: any write operation perform synchronously
TMPFILE: Create an unnamed temporary file
TRUNC: truncate size to 0
WRONLY: open for writing only