Python的os.fsync()
方法返回強制將檔案描述符fd
寫入磁碟。 如果使用Python檔案物件f
,首先要執行f.flush()
,然後執行os.fsync(f.fileno())
,以確保與f關聯的所有內部緩衝區都被寫入磁碟。
語法
以下是fsync()
方法的語法 -
os.fsync(fd)
引數
返回值
範例
以下範例顯示了fsync()
方法的用法。
#!/usr/bin/python3
import os, sys
# Open a file
fd = os.open( "foo.txt", os.O_RDWR|os.O_CREAT )
# Write one string
line = "this is test"
b = line.encode()
os.write(fd, b)
# Now you can use fsync() method.
# Infact here you would not be able to see its effect.
os.fsync(fd)
# Now read this file from the beginning
os.lseek(fd, 0, 0)
line = os.read(fd, 100)
b = line.decode()
print ("Read String is : ", b)
# Close opened file
os.close( fd )
print ("Closed the file successfully!!")
執行上面程式碼後,將得到以下結果 -
Read String is : this is test
Closed the file successfully!!