Python Tutorial ( PDFDrive )

Example
The following example shows the usage of dup2() method.
#!/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!!"
Let us compile and run the above program, this will produce the following result:
Read String is : This is test
Closed the file successfully!!
os.fchdir(fd)
Description
The method fchdir() change the current working directory to the directory represented by the file descriptor fd.
The descriptor must refer to an opened directory, not an open file.
Syntax
Following is the syntax for fchdir() method:
os.fchdir(fd);
Parameters
• fd -- This is Directory descriptor.
Return Value
This method does not return any value.
Example
The following example shows the usage of fchdir() method.
#!/usr/bin/python
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