Python os.fstatvfs() Method

Python File(文件) 方法Python OS File/Directory Methods

Overview

The os.fstatvfs() method is used to return information about the file system of the file containing the file descriptor fd, similar to statvfs().

Available on Unix.

The structure returned by the fstatvfs method:

  • f_bsize:File system block size

  • f_frsize:Fragment size

  • f_blocks:Total number of data blocks in the file system

  • f_bfree:Number of free blocks

  • f_bavail:Number of blocks available to non-superuser

  • f_files:Total number of inodes

  • f_ffree:Number of free inodes

  • f_favail:Number of free inodes available to non-superuser

  • f_fsid:File system identifier ID

  • f_flag:Mount flags

  • f_namemax:Maximum file name length

Syntax

fstatvfs()The method syntax is as follows:

os.fstatvfs(fd)

Parameters

  • fd-- The file descriptor.

Return Value

Returns information about the file system of the file containing the file descriptor fd.

Example

The following example demonstrates the use of the fstatvfs() method:

#!/usr/bin/python
# -*- coding: UTF-8 -*-

import os, sys

# 打开文件
fd = os.open( "foo.txt", os.O_RDWR|os.O_CREAT )

# 获取元组
info = os.fstatvfs(fd)

print "文件信息 :", info

# 获取文件名最大长度
print "文件名最大长度 :%d" % info.f_namemax

# 获取可用块数
print "可用块数 :%d" % info.f_bfree

# 关闭文件
os.close( fd)

The output of the above program is:

文件信息 : (4096, 4096, 2621440L, 1113266L, 1113266L, 
             8929602L, 8764252L, 8764252L, 0, 255)
文件名最大长度 :255
可用块数 :1113266

Python File(文件) 方法Python OS File/Directory Methods

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