MOUNT_STD(8)

NAME
mount_std, mount_devfs, mount_fdescfs, mount_linprocfs, mount_procfs - mount “standard” file systems

SYNOPSIS
mount_fsname [-o options] fs mount_point

DESCRIPTION
The mount_std utility is a generic mechanism for attaching ``standard'' file systems to the file system. The mount_std utility currently supports the following file systems: devfs, fdescfs, linprocfs and procfs. A ``standard'' file system is one which:

1.  accepts only the standard -o options “ro”, “rw”, “noexec”, “nosuid”, and “union”.

2.  has a kernel file system module name the same as its user-visible name.

3.  requires no other special processing on the part of the mount_std utility.

The options are as follows:

-o  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.

The mount_std utility examines its zeroth command-line argument (the name by which it was called) to determine the type of file system to be mounted. If it is called by a name which does not end in “_fsname”, mount_std will assume (for compatibility with mount(8)) that the zeroth argument contains only the name of the file system type. The mount_std utility is normally installed with appropriate links to commands for the distributed file systems which can be mounted in this way; for information on the function of each file system, see the manual page for that specific mount_fsname utility.

Refer to the following manual pages for detailed information on these file systems: devfs(5), fdescfs(5), linprocfs(5) and procfs(5).

DIAGNOSTICS

argv[0] must end in _fsname The mount_std utility was called with a zeroth argument of “mount_std”.

%s file system not available The specified file system type was not present in the kernel and no loadable module for it was found.

SEE ALSO
mount(2), unmount(2), getvfsbyname(3), devfs(5), fdescfs(5), fstab(5), linprocfs(5), procfs(5), mount(8)

CAVEATS
None of the ``standard'' file systems may be NFS-exported.

HISTORY
The mount_std utility first appeared in FreeBSD 2.2. Loadable file system modules first appeared in FreeBSD 2.0. The “fdescfs” and “procfs” file system types first appeared in FreeBSD 2.0; the “devfs” file system type first appeared in FreeBSD 2.2; the “linprocfs” file system type first appeared in FreeBSD 4.0.