VFS_STATFS(9) return file system status

SYNOPSIS

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

DESCRIPTION

The Fn 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:

Fa mp
The file system.
Fa 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.

AUTHORS

This manual page was written by An Doug Rabson .