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import sys
import uos
import uerrno
try:
uos.VfsFat
except AttributeError:
print("SKIP")
sys.exit()
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: # BP_IOCTL_SEC_COUNT
return len(self.data) // self.SEC_SIZE
if op == 5: # BP_IOCTL_SEC_SIZE
return self.SEC_SIZE
try:
bdev = RAMFS(48)
except MemoryError:
print("SKIP")
sys.exit()
# can't mkfs readonly device
try:
uos.vfs_mkfs(bdev, "/ramdisk", readonly=True)
except OSError as e:
print(e)
# mount before mkfs
try:
uos.vfs_mount(bdev, "/ramdisk")
except OSError as e:
print(e)
# invalid umount
try:
uos.vfs_umount("/ramdisk")
except OSError as e:
print(e.args[0] == uerrno.EINVAL)
try:
uos.vfs_mount(None, "/ramdisk")
except OSError as e:
print(e)
try:
uos.vfs_mkfs(None, "/ramdisk")
except OSError as e:
print(e)
# valid mkfs/mount
uos.vfs_mkfs(bdev, "/ramdisk")
uos.vfs_mount(bdev, "/ramdisk")
# umount by path
uos.vfs_umount("/ramdisk")
# readonly mount
uos.vfs_mount(bdev, "/ramdisk", readonly=True)
vfs = uos.VfsFat(bdev, "/ramdisk")
try:
f = vfs.open("file.txt", "w")
except OSError as e:
print("EROFS:", e.args[0] == 30) # uerrno.EROFS
# device is None == umount
uos.vfs_mount(None, "/ramdisk")
# max mounted devices
dev = []
try:
for i in range(0,4):
dev.append(RAMFS(48))
uos.vfs_mkfs(dev[i], "/ramdisk" + str(i))
uos.vfs_mount(dev[i], "/ramdisk" + str(i))
except OSError as e:
print(e)
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