Describes the structure of the statistics returned by the statfs, fstatfs, or ustat subroutine.
The statfs and fstatfs subroutines return information on a mounted (virtual) file system in the form of a statfs structure. The /usr/include/sys/statfs.h file describes the statfs structure, which contains the following fields:
|f_version||Version number of the statfs structure. This value is currently 0.|
|f_length||Length of the buffer that contains the returned information. This value is currently 0.|
|f_type||Type of information returned. This value is currently 0.|
|f_bsize||Optimal block size of the file system.|
|f_blocks||Total number of blocks in the system.|
|f_bfree||Number of free blocks in the file system. The size of a free block is given in the f_bsize field.|
|f_bavail||Number of free blocks available to a nonroot user.|
|f_files||Total number of file nodes in the file system.|
|f_ffree||Number of free file nodes in the file system.|
|f_fsid||File system ID.|
|f_vfstype|| Type of this virtual file system. Possible values are:
|f_fsize||Fundamental block size of the file system.|
|f_fname|| File system name. The value returned by this field depends on the type of file system:
|f_fpack|| File system pack name. The value returned by this field depends on the file system
|f_name_max||Maximum length of a component name for this file system.|
Note: Fields that are not defined for a particular file system are set to a value of -1.
The ustat system returns information on a mounted file system in the form of a ustat structure. The ustat structure, which is defined in the /usr/include/ustat.h file, contains the following fields:
|f_tfree||Total number of free blocks in the file system. The size of a free block is given in by the UBSIZE constant. See the param.h file for a description of UBSIZE.|
|f_inode||Number of free i-nodes in the file system.|
|f_fname||File system name.|
|f_fpack||File system pack name.|
This file is part of Base Operating System (BOS) Runtime.
|statfs.h||Path to the statfs.h file.|
|ustat.h||Path to the ustat.h file.|
The filsys.h file format, param.h file, vmount.h file.
The statfs, fstatfs, or ustat subroutine.
The Header Files Overview defines header files, describes how they are used, and lists several of the documented header files.