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https://github.com/openvswitch/ovs
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145a7e88bb
It appears that Python silently treats invalid escape sequences in strings as literals, e.g. "\." is the same as "\\.". Newer versions of checkpatch complain, and it does seem reasonable to me to fix these. Acked-by: Numan Siddique <nusiddiq@redhat.com> Tested-by: Numan Siddique <nusiddiq@redhat.com> Signed-off-by: Ben Pfaff <blp@ovn.org>
96 lines
3.0 KiB
Python
96 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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On Windows an absolute path contains ':' ( i.e: C:\\ ) """
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if file_name.startswith('/') or file_name.find(':') > -1:
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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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