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Files Reference

statvfs.h File

Purpose

Describes the structure of the statistics that are returned by the statvfs subroutines and fsatvfs subroutines.

Description

The statvfs subroutines and fsatvfs subroutines return information on a mounted filesystem in the form of statvfs. The /usr/include/sys/statvfs.h file describes the following fields in the statvfs subroutine:

f_bsize Preferred file system block size
f_frsize Fundamental file system block size
f_block Total number of block f_frsize in the file system.
f_bfree Total number of free blocks of f_frsize in the file system.
f_bavail Total number of available blocks of f_frsize that can be used by users without root access.
f_files Total number of file nodes in the file system
f_ffree Number of free file nodes in the file system.
f_favail Number of free file nodes that can be user without root access.
f_fsid File system ID.
f_basetype File system type name
f_flag File system flags:
ST_RDONLY
File system is mounted read only
ST_NOSUID
File system does not support set used ID file modes
ST_NODEV
Device opens are not allowed through mounts.
f_namemax Maximum length of a component name for this file system
f_fstr File system specific string.

The following prototypes also appear in the /usr/include/sys/statvfs.h file:

extern int statvfs(const char *, struct statvfs *);

extern int fsatvfs(int, struct statvfs *);

Related Information

The ststvfs subroutine, fstatvfs subroutine.

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