The format is:
<class>=space-separated list of words
login-regexp|<login-class> perm dev-glob|<dev-class> \
The revert-mode, revert-owner, and revert-group fields are optional, and default to 0600, root, and root, respectively.
The words in a class definition are evaluated as globs if they refer to files, but as regular expressions if they apply to a console definition. Do not mix them.
Any line can be broken and continued on the next line by using a \ character as the last character on the line.
The login-class class and the login-regexp word are evaluated as regular expressions. The dev-class and the dev-glob word are evaluated as shell-style globs. If a name given corresponds to a directory, and if it is a mount point listed in /etc/fstab, the device node associated with the filesystem mounted at that point will be substituted in its place.
Classes are denoted by being contained in < angle bracket > characters; a lack of < angle brackets > indicates that the string is to be taken literally as a login-regexp or a dev-glob, depending on its input position.