8aefef51bd
From changeset 8087f5ff825cae3a699e5a60ca6dd0deb10fc8e5 dirs.py.template needs to be adopted for Ryu environment. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
94 lines
3.0 KiB
Python
94 lines
3.0 KiB
Python
# Copyright (c) 2010, 2011, 2012 Nicira, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at:
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import os
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import os.path
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import sys
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PROGRAM_NAME = os.path.basename(sys.argv[0])
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EOF = -1
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def abs_file_name(dir_, file_name):
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"""If 'file_name' starts with '/', returns a copy of 'file_name'.
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Otherwise, returns an absolute path to 'file_name' considering it relative
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to 'dir_', which itself must be absolute. 'dir_' may be None or the empty
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string, in which case the current working directory is used.
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Returns None if 'dir_' is None and getcwd() fails.
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This differs from os.path.abspath() in that it will never change the
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meaning of a file name."""
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if file_name.startswith('/'):
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return file_name
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else:
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if dir_ is None or dir_ == "":
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try:
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dir_ = os.getcwd()
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except OSError:
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return None
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if dir_.endswith('/'):
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return dir_ + file_name
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else:
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return "%s/%s" % (dir_, file_name)
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def ovs_retval_to_string(retval):
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"""Many OVS functions return an int which is one of:
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- 0: no error yet
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- >0: errno value
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- EOF: end of file (not necessarily an error; depends on the function
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called)
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Returns the appropriate human-readable string."""
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if not retval:
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return ""
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if retval > 0:
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return os.strerror(retval)
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if retval == EOF:
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return "End of file"
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return "***unknown return value: %s***" % retval
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def ovs_error(err_no, message, vlog=None):
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"""Prints 'message' on stderr and emits an ERROR level log message to
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'vlog' if supplied. If 'err_no' is nonzero, then it is formatted with
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ovs_retval_to_string() and appended to the message inside parentheses.
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'message' should not end with a new-line, because this function will add
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one itself."""
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err_msg = "%s: %s" % (PROGRAM_NAME, message)
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if err_no:
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err_msg += " (%s)" % ovs_retval_to_string(err_no)
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sys.stderr.write("%s\n" % err_msg)
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if vlog:
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vlog.err(err_msg)
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def ovs_fatal(*args, **kwargs):
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"""Prints 'message' on stderr and emits an ERROR level log message to
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'vlog' if supplied. If 'err_no' is nonzero, then it is formatted with
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ovs_retval_to_string() and appended to the message inside parentheses.
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Then, terminates with exit code 1 (indicating a failure).
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'message' should not end with a new-line, because this function will add
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one itself."""
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ovs_error(*args, **kwargs)
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sys.exit(1)
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