os.access( ) Method in Python 3
The method access() uses the real uid/gid to test for
access to path. Most operations will use the effective uid/gid, therefore this routine can
be used in a suid/sgid environment to test if the invoking user has the
specified access to path. It returns True if access is allowed, False if not.
Syntax
os.access(path,
mode)
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Parameters
- path - This is the path which would be tested for existence or any access.
- mode - This should be F_OK to test the existence of path, or it can be the inclusive OR of one or more of R_OK, W_OK, and X_OK to test permissions.
- os.F_OK: Value to pass as the mode parameter of access() to test the existence of path.
- os.R_OK: Value to include in the mode parameter of access() to test the readability of path.
- os.W_OK: Value to include in the mode parameter of access() to test the writability of path.
- os.X_OK: Value to include in the mode parameter of access() to determine if path can be executed.
Return Value
This method
returns True if access is allowed, False if not.
Example
#!/usr/bin/python3
import
os, sys
#
Assuming /tmp/foo.txt exists and has read/write permissions.
ret =
os.access("/tmp/foo.txt", os.F_OK)
print
("F_OK - return value %s"% ret)
ret =
os.access("/tmp/foo.txt", os.R_OK)
print
("R_OK - return value %s"% ret)
ret =
os.access("/tmp/foo.txt", os.W_OK)
print
("W_OK - return value %s"% ret)
ret =
os.access("/tmp/foo.txt", os.X_OK)
print
("X_OK - return value %s"% ret)
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When we run the above program, it produces the
following result-
F_OK -
return value True
R_OK -
return value True
W_OK -
return value True
X_OK -
return value False
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