mirror of
https://github.com/ceph/ceph
synced 2024-12-30 07:23:11 +00:00
43 lines
1.2 KiB
Python
43 lines
1.2 KiB
Python
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import errno
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import os
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def munge(path):
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"""
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Munge a potentially hostile path name to be safe to use.
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This very definitely changes the meaning of the path,
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but it only does that for unsafe paths.
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"""
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# explicitly ignoring windows as a platform
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segments = path.split('/')
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# filter out empty segments like foo//bar
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segments = [s for s in segments if s!='']
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# filter out no-op segments like foo/./bar
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segments = [s for s in segments if s!='.']
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# all leading dots become underscores; makes .. safe too
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for idx, seg in enumerate(segments):
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if seg.startswith('.'):
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segments[idx] = '_'+seg[1:]
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# empty string, "/", "//", etc
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if not segments:
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segments = ['_']
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return '/'.join(segments)
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def makedirs(root, path):
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"""
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os.makedirs gets confused if the path contains '..', and root might.
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This relies on the fact that `path` has been normalized by munge().
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"""
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segments = path.split('/')
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for seg in segments:
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root = os.path.join(root, seg)
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try:
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os.mkdir(root)
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except OSError as e:
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if e.errno == errno.EEXIST:
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pass
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else:
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raise
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