The
mount_tmpfs command attaches an instance of the efficient memory file system to the global file system namespace. The
tmpfs parameter only exists for compatibility with the other mount commands and is ignored. The directory specified by
mount_point is converted to an absolute path before use and its attributes (owner, group and mode) are inherited unless explicitly overriden by the options described below.
The following options are supported:
-g group
Specifies the group name or GID of the root inode of the file system. Defaults to the mount point's GID.
-m mode
Specifies the mode (in octal notation) of the root inode of the file system. Defaults to the mount point's mode.
-n nodes
Specifies the maximum number of nodes available to the file system. If not specified, the file system chooses a reasonable maximum given its size at mount time, which can be limited with -s.
-o options
Options are specified with a
-o flag followed by a comma-separated string of options. See the
mount(8) man page for possible options and their meanings.
-s size
Specifies the total file system size in bytes. If zero is given (the default), the available amount of memory (including main memory and swap space) will be used. Note that four megabytes are always reserved for the system and cannot be assigned to the file system.
-u user
Specifies the user name or UID of the root inode of the file system. Defaults to the mount point's UID.
Every option that accepts a numerical value as its argument can take a trailing ‘b' to indicate bytes (the default), a trailing ‘k' to indicate kilobytes, a trailing ‘M' to indicate megabytes or a trailing ‘G' to indicate gigabytes. Note that both lowercase and uppercase forms of these letters are allowed.