The options are as follows:
If a specfile entry exists in the underlying file system, its permissions and modification time will be used unless specifically overridden by the specfile. An error will be raised if the type of entry in the specfile conflicts with that of an existing entry.
In the opposite case (where a specfile entry does not have an entry in the underlying file system) the following occurs: If the specfile entry is marked optional, the specfile entry is ignored. Otherwise, the entry will be created in the image, and it is necessary to specify at least the following parameters in the specfile: type, mode, gname, or gid, and uname or uid, device (in the case of block or character devices), and link (in the case of symbolic links). If time isn't provided, the current time will be used. If flags isn't provided, the current file flags will be used. Missing regular file entries will be created as zero-length files.
master.passwd
and group database text file
group
from
dbdir,
rather than using the results from the system's
getpwnam(3)
and
getgrnam(3)
(and related) library calls.
Where sizes are specified, a decimal number of bytes is expected. Two or more numbers may be separated by an ``x'' to indicate a product. Each number may have one of the following optional suffixes: