kopia lustrzana https://github.com/micropython/micropython
70 wiersze
1.6 KiB
Python
70 wiersze
1.6 KiB
Python
# test VFS functionality with a user-defined filesystem
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# also tests parts of uio.IOBase implementation
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import sys
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try:
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import uio
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uio.IOBase
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import uos
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uos.mount
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except (ImportError, AttributeError):
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print("SKIP")
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raise SystemExit
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class UserFile(uio.IOBase):
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def __init__(self, data):
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self.data = data
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self.pos = 0
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def read(self):
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return self.data
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def readinto(self, buf):
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n = 0
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while n < len(buf) and self.pos < len(self.data):
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buf[n] = self.data[self.pos]
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n += 1
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self.pos += 1
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return n
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def ioctl(self, req, arg):
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print('ioctl', req, arg)
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return 0
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class UserFS:
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def __init__(self, files):
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self.files = files
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def mount(self, readonly, mksfs):
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pass
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def umount(self):
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pass
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def stat(self, path):
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print('stat', path)
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if path in self.files:
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return (32768, 0, 0, 0, 0, 0, 0, 0, 0, 0)
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raise OSError
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def open(self, path, mode):
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print('open', path, mode)
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return UserFile(self.files[path])
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# create and mount a user filesystem
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user_files = {
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'/data.txt': b"some data in a text file\n",
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'/usermod1.py': b"print('in usermod1')\nimport usermod2",
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'/usermod2.py': b"print('in usermod2')",
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}
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uos.mount(UserFS(user_files), '/userfs')
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# open and read a file
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f = open('/userfs/data.txt')
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print(f.read())
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# import files from the user filesystem
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sys.path.append('/userfs')
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import usermod1
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# unmount and undo path addition
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uos.umount('/userfs')
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sys.path.pop()
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