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# test VFS functionality without any particular filesystem type
try:
import os, vfs
except ImportError:
print("SKIP")
raise SystemExit
class Filesystem:
def __init__(self, id, fail=0):
self.id = id
self.fail = fail
def mount(self, readonly, mkfs):
print(self.id, "mount", readonly, mkfs)
def umount(self):
print(self.id, "umount")
def ilistdir(self, dir):
print(self.id, "ilistdir", dir)
return iter([("a%d" % self.id, 0, 0)])
def chdir(self, dir):
print(self.id, "chdir", dir)
if self.fail:
raise OSError(self.fail)
def getcwd(self):
print(self.id, "getcwd")
return "dir%d" % self.id
def mkdir(self, path):
print(self.id, "mkdir", path)
def remove(self, path):
print(self.id, "remove", path)
def rename(self, old_path, new_path):
print(self.id, "rename", old_path, new_path)
def rmdir(self, path):
print(self.id, "rmdir", path)
def stat(self, path):
print(self.id, "stat", path)
return (self.id,)
def statvfs(self, path):
print(self.id, "statvfs", path)
return (self.id,)
def open(self, file, mode):
print(self.id, "open", file, mode)
# first we umount any existing mount points the target may have
try:
vfs.umount("/")
except OSError:
pass
for path in os.listdir("/"):
vfs.umount("/" + path)
# stat root dir
print(os.stat("/"))
# statvfs root dir; verify that f_namemax has a sensible size
print(os.statvfs("/")[9] >= 32)
# getcwd when in root dir
print(os.getcwd())
# test operations on the root directory with nothing mounted, they should all fail
for func in ("chdir", "listdir", "mkdir", "remove", "rmdir", "stat"):
for arg in ("x", "/x"):
try:
getattr(os, func)(arg)
except OSError:
print(func, arg, "OSError")
# basic mounting and listdir
vfs.mount(Filesystem(1), "/test_mnt")
print(os.listdir())
# ilistdir
i = os.ilistdir()
print(next(i))
try:
next(i)
except StopIteration:
print("StopIteration")
try:
next(i)
except StopIteration:
print("StopIteration")
# referencing the mount point in different ways
print(os.listdir("test_mnt"))
print(os.listdir("/test_mnt"))
# mounting another filesystem
vfs.mount(Filesystem(2), "/test_mnt2", readonly=True)
print(os.listdir())
print(os.listdir("/test_mnt2"))
# mounting over an existing mount point
try:
vfs.mount(Filesystem(3), "/test_mnt2")
except OSError:
print("OSError")
# mkdir of a mount point
try:
os.mkdir("/test_mnt")
except OSError:
print("OSError")
# rename across a filesystem
try:
os.rename("/test_mnt/a", "/test_mnt2/b")
except OSError:
print("OSError")
# delegating to mounted filesystem
os.chdir("test_mnt")
print(os.listdir())
print(os.getcwd())
os.mkdir("test_dir")
os.remove("test_file")
os.rename("test_file", "test_file2")
os.rmdir("test_dir")
print(os.stat("test_file"))
print(os.statvfs("/test_mnt"))
open("test_file")
open("test_file", "wb")
# umount
vfs.umount("/test_mnt")
vfs.umount("/test_mnt2")
# umount a non-existent mount point
try:
vfs.umount("/test_mnt")
except OSError:
print("OSError")
# root dir
vfs.mount(Filesystem(3), "/")
print(os.stat("/"))
print(os.statvfs("/"))
print(os.listdir())
open("test")
vfs.mount(Filesystem(4), "/mnt")
print(os.listdir())
print(os.listdir("/mnt"))
os.chdir("/mnt")
print(os.listdir())
# chdir to a subdir within root-mounted vfs, and then listdir
os.chdir("/subdir")
print(os.listdir())
os.chdir("/")
vfs.umount("/")
print(os.listdir("/"))
vfs.umount("/mnt")
# chdir to a non-existent mount point (current directory should remain unchanged)
try:
os.chdir("/foo")
except OSError:
print("OSError")
print(os.getcwd())
# chdir to a non-existent subdirectory in a mounted filesystem
vfs.mount(Filesystem(5, 1), "/mnt")
try:
os.chdir("/mnt/subdir")
except OSError:
print("OSError")
print(os.getcwd())
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