170 lines
3.6 KiB
Python
170 lines
3.6 KiB
Python
import sys
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import uos
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import uerrno
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try:
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uos.VfsFat
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except AttributeError:
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print("SKIP")
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sys.exit()
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class RAMFS:
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SEC_SIZE = 512
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def __init__(self, blocks):
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self.data = bytearray(blocks * self.SEC_SIZE)
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def readblocks(self, n, buf):
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#print("readblocks(%s, %x(%d))" % (n, id(buf), len(buf)))
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for i in range(len(buf)):
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buf[i] = self.data[n * self.SEC_SIZE + i]
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def writeblocks(self, n, buf):
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#print("writeblocks(%s, %x)" % (n, id(buf)))
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for i in range(len(buf)):
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self.data[n * self.SEC_SIZE + i] = buf[i]
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def ioctl(self, op, arg):
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#print("ioctl(%d, %r)" % (op, arg))
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if op == 4: # BP_IOCTL_SEC_COUNT
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return len(self.data) // self.SEC_SIZE
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if op == 5: # BP_IOCTL_SEC_SIZE
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return self.SEC_SIZE
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try:
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bdev = RAMFS(50)
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except MemoryError:
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print("SKIP")
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sys.exit()
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uos.VfsFat.mkfs(bdev)
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vfs = uos.VfsFat(bdev, "/ramdisk")
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# file IO
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f = vfs.open("foo_file.txt", "w")
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print(str(f)[:17], str(f)[-1:])
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f.write("hello!")
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f.flush()
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f.close()
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f.close() # allowed
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try:
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f.write("world!")
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except OSError as e:
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print(e.args[0] == uerrno.EINVAL)
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try:
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f.read()
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except OSError as e:
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print(e.args[0] == uerrno.EINVAL)
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try:
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f.flush()
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except OSError as e:
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print(e.args[0] == uerrno.EINVAL)
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try:
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vfs.open("foo_file.txt", "x")
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except OSError as e:
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print(e.args[0] == uerrno.EEXIST)
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with vfs.open("foo_file.txt", "a") as f:
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f.write("world!")
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with vfs.open("foo_file.txt") as f2:
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print(f2.read())
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print(f2.tell())
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f2.seek(0, 0) # SEEK_SET
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print(f2.read(1))
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f2.seek(0, 1) # SEEK_CUR
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print(f2.read(1))
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try:
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f2.seek(1, 1) # SEEK_END
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except OSError as e:
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print(e.args[0] == uerrno.EOPNOTSUPP)
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f2.seek(-2, 2) # SEEK_END
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print(f2.read(1))
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# using constructor of FileIO type to open a file
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FileIO = type(f)
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with FileIO("/ramdisk/foo_file.txt") as f:
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print(f.read())
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# dirs
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vfs.mkdir("foo_dir")
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try:
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vfs.rmdir("foo_file.txt")
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except OSError as e:
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print(e.args[0] == 20) # uerrno.ENOTDIR
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try:
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vfs.mkdir("foo_dir")
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except OSError as e:
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print(e.args[0] == uerrno.EEXIST)
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try:
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vfs.remove("foo_dir")
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except OSError as e:
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print(e.args[0] == uerrno.EISDIR)
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try:
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vfs.remove("no_file.txt")
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except OSError as e:
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print(e.args[0] == uerrno.ENOENT)
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try:
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vfs.rename("foo_dir", "/null/file")
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except OSError as e:
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print(e.args[0] == uerrno.ENOENT)
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# file in dir
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with vfs.open("foo_dir/file-in-dir.txt", "w+t") as f:
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f.write("data in file")
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with vfs.open("foo_dir/file-in-dir.txt", "r+b") as f:
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print(f.read())
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with vfs.open("foo_dir/sub_file.txt", "w") as f:
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f.write("subdir file")
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# directory not empty
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try:
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vfs.rmdir("foo_dir")
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except OSError as e:
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print(e.args[0] == uerrno.EACCES)
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# trim full path
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vfs.rename("foo_dir/file-in-dir.txt", "foo_dir/file.txt")
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print(vfs.listdir("foo_dir"))
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vfs.rename("foo_dir/file.txt", "moved-to-root.txt")
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print(vfs.listdir())
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# check that renaming to existing file will overwrite it
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with vfs.open("temp", "w") as f:
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f.write("new text")
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vfs.rename("temp", "moved-to-root.txt")
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print(vfs.listdir())
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with vfs.open("moved-to-root.txt") as f:
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print(f.read())
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# valid removes
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vfs.remove("foo_dir/sub_file.txt")
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vfs.remove("foo_file.txt")
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vfs.rmdir("foo_dir")
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print(vfs.listdir())
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# disk full
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try:
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bsize = vfs.statvfs("/ramdisk")[0]
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free = vfs.statvfs("/ramdisk")[2] + 1
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f = vfs.open("large_file.txt", "wb")
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f.write(bytearray(bsize * free))
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except OSError as e:
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print("ENOSPC:", e.args[0] == 28) # uerrno.ENOSPC
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