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Python os.dup2() Method
Description:
This method duplicates file descriptor fd to fd2, closing the latter first if necessary.
Note: New file description would be assigned only when it is available. In the following example given below, 1000 would be assigned as a duplicate fd in case when 1000 is available.
Syntax:
Parameters:
Here is the detail of parameters:
Example:
#!/usr/bin/python
import os, sys
# Open a file
fd = os.open( "foo.txt", os.O_RDWR|os.O_CREAT )
# Write one string
os.write(fd, "This is test")
# Now duplicate this file descriptor as 1000
fd2 = 1000
os.dup2(fd, fd2);
# Now read this file from the beginning using fd2.
os.lseek(fd2, 0, 0)
str = os.read(fd2, 100)
print "Read String is : ", str
# Close opened file
os.close( fd )
print "Closed the file successfully!!"
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This would produce following result:
Read String is : This is test
Closed the file successfully!!
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