Python3 os.fpathconf() Method
Python3 OS File/Directory Methods
Overview
The os.fpathconf() method is used to return system configuration information for an open file.
Available on Unix.
Syntax
fpathconf()The method syntax is as follows:
os.fpathconf(fd, name)
Parameters
fd-- The descriptor of the opened file.
name-- Optional, same as the buffersize parameter and Python's built-in open function, the mode parameter can specify 'r,w,a,r+,w+,a+,b', etc., indicating whether the file is read-only or readable/writable, and whether the file is opened in binary or text form. These parameters are similar to the mode parameter specified in the fopen function in <stdio.h> in C language.
Return Value
Returns system configuration information for an open file.
Example
The following example demonstrates the usage of the fpathconf() method:
#!/usr/bin/python3
import os, sys
# 打开文件
fd = os.open( "foo.txt", os.O_RDWR|os.O_CREAT )
print ("%s" % os.pathconf_names)
# 获取最大文件连接数
no = os.fpathconf(fd, 'PC_LINK_MAX')
print ("文件最大连接数为 :%d" % no)
# 获取文件名最大长度
no = os.fpathconf(fd, 'PC_NAME_MAX')
print ("文件名最大长度为 :%d" % no)
# 关闭文件
os.close( fd )
print ("关闭文件成功!!")
The output of executing the above program is:
{'PC_MAX_INPUT': 2, 'PC_VDISABLE': 8, 'PC_SYNC_IO': 9,
'PC_SOCK_MAXBUF': 12, 'PC_NAME_MAX': 3, 'PC_MAX_CANON': 1,
'PC_PRIO_IO': 11, 'PC_CHOWN_RESTRICTED': 6, 'PC_ASYNC_IO': 10,
'PC_NO_TRUNC': 7, 'PC_FILESIZEBITS': 13, 'PC_LINK_MAX': 0,
'PC_PIPE_BUF': 5, 'PC_PATH_MAX': 4}
文件最大连接数为 :127
文件名最大长度为 :255
Closed the file successfully!!
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