Python 3 - os.lchflags() Method

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Description

The method lchflags() sets the flags of path to the numeric flags. This method does not follow symbolic links unlike chflags() method. As of Python 3.3, this is equivalent to os.chflags(path, flags, follow_symlinks = False).

Here, flags may take a combination (bitwise OR) of the following values (as defined in the stat module) −

• UF_NODUMP − Do not dump the file.

• UF_IMMUTABLE − The file may not be changed.

• UF_APPEND − The file may only be appended to.

• UF_NOUNLINK − The file may not be renamed or deleted.

• UF_OPAQUE − The directory is opaque when viewed through a union stack.

• SF_ARCHIVED − The file may be archived.

• SF_IMMUTABLE − The file may not be changed.

• SF_APPEND − The file may only be appended to.

• SF_NOUNLINK − The file may not be renamed or deleted.

• SF_SNAPSHOT − The file is a snapshot file.

Note − This method has been introduced in Python 2.6

Syntax

Following is the syntax for lchflags() method −

os.lchflags(path, flags)

Parameters

• path − This is the file path for which flags to be set.

• flags − This could be a combination (bitwise OR) of the above defined flags values.

Return Value

This method does not return any value. Available on Unix like systems

Example

The following example shows the usage of lchflags() method.

#!/usr/bin/python3
import os, sys

# Open a file
path = "/var/www/html/foo.txt"
fd = os.open( path, os.O_RDWR|os.O_CREAT )

# Close opened file
os.close( fd )

# Now change the file flag.
ret = os.lchflags(path, os.UF_IMMUTABLE )

print ("Changed file flag successfully!!")

Result

When we run the above program, it produces the following result −

Changed file flag successfully!!