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0ce6e534d3
Add one simple exapmle and contrast some of the information using mount(8) PR: Submitted by: Reported by: Reviewed by: gbe@, yuripv@ Approved by: manpages (bcr@) Obtained from: MFC after: MFH: Relnotes: Security: Sponsored by: Differential Revision: https://reviews.freebsd.org/D27544
72 lines
1.4 KiB
Groff
72 lines
1.4 KiB
Groff
.\" $FreeBSD$
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.\" Garrett A. Wollman, September 1994
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.\" This file is in the public domain.
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.\"
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.Dd December 28, 2020
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.Dt LSVFS 1
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.Os
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.Sh NAME
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.Nm lsvfs
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.Nd list installed virtual file systems
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.Sh SYNOPSIS
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.Nm
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.Op Ar vfsname Ar ...
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.Sh DESCRIPTION
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The
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.Nm
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command lists information about the currently loaded virtual file system
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modules.
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When
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.Ar vfsname
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arguments are given,
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.Nm
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lists information about the specified VFS modules.
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Otherwise,
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.Nm
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lists all currently loaded modules.
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The information is as follows:
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.Pp
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.Bl -tag -compact -width Filesystem
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.It Filesystem
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the name of the file system, as would be used in the
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.Ar type
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parameter to
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.Xr mount 2
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and the
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.Fl t
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option to
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.Xr mount 8
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.It Num
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the filesystem type number.
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.It Refs
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the number of references to this VFS; i.e., the number of currently
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mounted file systems of this type
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.It Flags
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flag bits.
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.El
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.Sh EXAMPLES
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Show information about the
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.Ql ufs
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and
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.Xr devfs 5
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filesystems and check the number of mounts for the former:
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.Bd -literal -offset indent
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$ lsvfs ufs devfs
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Filesystem Num Refs Flags
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-------------------------------- ---------- ----- ---------------
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ufs 0x00000035 2
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devfs 0x00000071 1 synthetic, jail
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$ mount -t ufs | wc -l
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2
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.Ed
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.Sh SEE ALSO
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.Xr mount 2 ,
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.Xr getvfsbyname 3 ,
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.Xr mount 8
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.Sh HISTORY
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A
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.Nm
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command appeared in
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.Fx 2.0 .
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