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try:
import errno, os, vfs
vfs.VfsFat
except (ImportError, AttributeError):
print("SKIP")
raise SystemExit
class RAMFS:
SEC_SIZE = 512
def __init__(self, blocks):
self.data = bytearray(blocks * self.SEC_SIZE)
def readblocks(self, n, buf):
# print("readblocks(%s, %x(%d))" % (n, id(buf), len(buf)))
for i in range(len(buf)):
buf[i] = self.data[n * self.SEC_SIZE + i]
def writeblocks(self, n, buf):
# print("writeblocks(%s, %x)" % (n, id(buf)))
for i in range(len(buf)):
self.data[n * self.SEC_SIZE + i] = buf[i]
def ioctl(self, op, arg):
# print("ioctl(%d, %r)" % (op, arg))
if op == 4: # MP_BLOCKDEV_IOCTL_BLOCK_COUNT
return len(self.data) // self.SEC_SIZE
if op == 5: # MP_BLOCKDEV_IOCTL_BLOCK_SIZE
return self.SEC_SIZE
try:
bdev = RAMFS(50)
vfs.VfsFat.mkfs(bdev)
except MemoryError:
print("SKIP")
raise SystemExit
fs = vfs.VfsFat(bdev)
vfs.mount(fs, "/ramdisk")
os.chdir("/ramdisk")
try:
fs.mkdir("foo_dir")
except OSError as e:
print(e.errno == errno.EEXIST)
try:
fs.remove("foo_dir")
except OSError as e:
print(e.errno == errno.EISDIR)
try:
fs.remove("no_file.txt")
except OSError as e:
print(e.errno == errno.ENOENT)
try:
fs.rename("foo_dir", "/null/file")
except OSError as e:
print(e.errno == errno.ENOENT)
# file in dir
with open("foo_dir/file-in-dir.txt", "w+t") as f:
f.write("data in file")
with open("foo_dir/file-in-dir.txt", "r+b") as f:
print(f.read())
with open("foo_dir/sub_file.txt", "w") as f:
f.write("subdir file")
# directory not empty
try:
fs.rmdir("foo_dir")
except OSError as e:
print(e.errno == errno.EACCES)
# trim full path
fs.rename("foo_dir/file-in-dir.txt", "foo_dir/file.txt")
print(list(fs.ilistdir("foo_dir")))
fs.rename("foo_dir/file.txt", "moved-to-root.txt")
print(list(fs.ilistdir()))
# check that renaming to existing file will overwrite it
with open("temp", "w") as f:
f.write("new text")
fs.rename("temp", "moved-to-root.txt")
print(list(fs.ilistdir()))
with open("moved-to-root.txt") as f:
print(f.read())
# valid removes
fs.remove("foo_dir/sub_file.txt")
fs.rmdir("foo_dir")
print(list(fs.ilistdir()))
# disk full
try:
bsize = fs.statvfs("/ramdisk")[0]
free = fs.statvfs("/ramdisk")[2] + 1
f = open("large_file.txt", "wb")
f.write(bytearray(bsize * free))
except OSError as e:
print("ENOSPC:", e.errno == 28) # errno.ENOSPC
f.close()
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