mount_tmpfs(1M) System Administration Commands mount_tmpfs(1M)NAMEmount_tmpfs - mount tmpfs file systems
SYNOPSIS
mount [ -F tmpfs] [ -o specific_options] [-O] special mount_point
DESCRIPTION
tmpfs is a memory based file system which uses kernel resources relat‐
ing to the VM system and page cache as a file system.
mount attaches a tmpfs file system to the file system hierarchy at the
pathname location mount_point, which must already exist. If mount_point
has any contents prior to the mount operation, these remain hidden
until the file system is once again unmounted. The attributes (mode,
owner, and group) of the root of the tmpfs filesystem are inherited
from the underlying mount_point, provided that those attributes are
determinable. If not, the root's attributes are set to their default
values.
The special argument is usually specified as swap but is in fact disre‐
garded and assumed to be the virtual memory resources within the sys‐
tem.
OPTIONS-o specific_options Specify tmpfs file system specific options in a
comma-separated list with no intervening spa‐
ces. If invalid options are specified, a warn‐
ing message is printed and the invalid options
are ignored. The following options are avail‐
able:
size=sz The sz argument controls the
size of this particular tmpfs
file system. If the argument is
has a `k' suffix, the number
will be interpreted as a number
of kilobytes. An `m' suffix
will be interpreted as a number
of megabytes. No suffix is
interpreted as bytes. In all
cases, the actual size of the
file system is the number of
bytes specified, rounded up to
the physical pagesize of the
system.
xattr | noxattr Allow or disallow the creation
and manipulation of extended
attributes. The default is
xattr. See fsattr(5) for a
description of extended
attributes.
-O Overlay mount. Allow the file system to be
mounted over an existing mount point, making
the underlying file system inaccessible. If a
mount is attempted on a pre-existing mount
point without setting this flag, the mount will
fail, producing the errordevice busy.
FILES
/etc/mnttab Table of mounted file systems
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌─────────────────────────────┬─────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│Availability │SUNWcsu │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOmount(1M), mkdir(2), mount(2), open(2), umount(2), mnttab(4),
attributes(5), fsattr(5), tmpfs(7FS)NOTES
If the directory on which a file system is to be mounted is a symbolic
link, the file system is mounted on the directory to which the symbolic
link refers, rather than on top of the symbolic link itself.
SunOS 5.10 24 Nov 2003 mount_tmpfs(1M)
