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Man Pages


Manual Reference Pages  -  VFS_STATFS (9)

NAME

VFS_STATFS - return file system status

CONTENTS

Synopsis
Description
See Also
Authors

SYNOPSIS


.In sys/param.h
.In sys/mount.h
.In sys/vnode.h int VFS_STATFS struct mount *mp struct statfs *sbp

DESCRIPTION

The VFS_STATFS macro returns various pieces of information about the file system, including recommended I/O sizes, free space, free inodes, etc.

The arguments it expects are:
mp The file system.
sbp A
.Vt statfs structure, as defined by
.In sys/mount.h , into which information is placed about the file system.

The fields of
.Vt struct statfs related to the file system are as follows:
f_type Type of file system.
f_flags A copy of mount exported flags.
f_bsize Fragment size.
f_iosize Optimal transfer block size.
f_blocks The total number of data blocks in the file system.
f_bfree The number of free blocks in the file system.
f_bavail The number of free blocks available to non-superuser processes.
f_files The total number of file nodes in the file system.
f_ffree The number of free nodes available to non-superuser processes.
f_syncwrites The number of synchronous writes since the file system was mounted.
f_asyncwrites
  The number of asynchronous writes since the file system was mounted.
f_syncreads The number of synchronous reads since the file system was mounted.
f_asyncreads The number of asynchronous reads since the file system was mounted.
f_namemax The maximum file name length for this file system.
f_owner The user ID of the user that mounted the file system.
f_fsid Unique file system ID.
f_fstypename The file system type name; a string of at most MFSNAMELEN bytes.
f_mntfromname
  The device name the file system was mounted from; a string of at most MNAMELEN bytes.
f_mntonname The name of the directory on which the file system is mounted; a string of at most MNAMELEN bytes.

SEE ALSO

VFS(9), vnode(9)

AUTHORS

This manual page was written by
.An Doug Rabson .
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