58 lines
1.6 KiB
Python
58 lines
1.6 KiB
Python
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# iutil.py stubs
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import os
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import logging
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log = logging.getLogger("storage")
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def notify_kernel(path, action="change"):
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""" Signal the kernel that the specified device has changed. """
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log.debug("notifying kernel of '%s' event on device %s" % (action, path))
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path = os.path.join(path, "uevent")
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if not path.startswith("/sys/") or not os.access(path, os.W_OK):
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log.debug("sysfs path '%s' invalid" % path)
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raise ValueError("invalid sysfs path")
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f = open(path, "a")
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f.write("%s\n" % action)
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f.close()
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def get_sysfs_path_by_name(dev_name, class_name="block"):
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dev_name = os.path.basename(dev_name)
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sysfs_class_dir = "/sys/class/%s" % class_name
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dev_path = os.path.join(sysfs_class_dir, dev_name)
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if os.path.exists(dev_path):
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return dev_path
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import inspect
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def log_method_call(d, *args, **kwargs):
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classname = d.__class__.__name__
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methodname = inspect.stack()[1][3]
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fmt = "%s.%s:"
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fmt_args = [classname, methodname]
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for arg in args:
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fmt += " %s ;"
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fmt_args.append(arg)
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for k, v in kwargs.items():
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fmt += " %s: %s ;"
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fmt_args.extend([k, v])
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log.debug(fmt % tuple(fmt_args))
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def numeric_type(num):
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""" Verify that a value is given as a numeric data type.
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Return the number if the type is sensible or raise ValueError
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if not.
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"""
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if num is None:
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num = 0
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elif not (isinstance(num, int) or \
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isinstance(num, long) or \
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isinstance(num, float)):
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raise ValueError("value (%s) must be either a number or None" % num)
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return num
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