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Name	Size	Permission
compat	[ DIR ]	drwxr-xr-x
db	[ DIR ]	drwxr-xr-x
flow	[ DIR ]	drwxr-xr-x
unixctl	[ DIR ]	drwxr-xr-x
__init__.py	38 B	-rw-r--r--
daemon.py	20.22 KB	-rw-r--r--
dirs.py	1.29 KB	-rw-r--r--
fatal_signal.py	4.65 KB	-rw-r--r--
fcntl_win.py	1.3 KB	-rw-r--r--
json.py	16.45 KB	-rw-r--r--
jsonrpc.py	20.59 KB	-rw-r--r--
ovsuuid.py	1.83 KB	-rw-r--r--
poller.py	10.04 KB	-rw-r--r--
process.py	1.43 KB	-rw-r--r--
reconnect.py	25.4 KB	-rw-r--r--
socket_util.py	11.7 KB	-rw-r--r--
stream.py	31.35 KB	-rw-r--r--
timeval.py	2.38 KB	-rw-r--r--
util.py	3.05 KB	-rw-r--r--
version.py	93 B	-rw-r--r--
vlog.py	16.3 KB	-rw-r--r--
winutils.py	9.01 KB	-rw-r--r--

Code Editor : util.py

# Copyright (c) 2010, 2011, 2012 Nicira, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at:
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import os
import os.path
import sys

PROGRAM_NAME = os.path.basename(sys.argv[0])
EOF = -1

def abs_file_name(dir_, file_name):
    """If 'file_name' starts with '/', returns a copy of 'file_name'.
    Otherwise, returns an absolute path to 'file_name' considering it relative
    to 'dir_', which itself must be absolute.  'dir_' may be None or the empty
    string, in which case the current working directory is used.

Returns None if 'dir_' is None and getcwd() fails.

This differs from os.path.abspath() in that it will never change the
    meaning of a file name.

On Windows an absolute path contains ':' ( i.e: C:\\ ) """
    if file_name.startswith('/') or file_name.find(':') > -1:
        return file_name
    else:
        if dir_ is None or dir_ == "":
            try:
                dir_ = os.getcwd()
            except OSError:
                return None

if dir_.endswith('/'):
            return dir_ + file_name
        else:
            return "%s/%s" % (dir_, file_name)

def ovs_retval_to_string(retval):
    """Many OVS functions return an int which is one of:
    - 0: no error yet
    - >0: errno value
    - EOF: end of file (not necessarily an error; depends on the function
      called)

Returns the appropriate human-readable string."""

if not retval:
        return ""
    if retval > 0:
        return os.strerror(retval)
    if retval == EOF:
        return "End of file"
    return "***unknown return value: %s***" % retval

def ovs_error(err_no, message, vlog=None):
    """Prints 'message' on stderr and emits an ERROR level log message to
    'vlog' if supplied.  If 'err_no' is nonzero, then it is formatted with
    ovs_retval_to_string() and appended to the message inside parentheses.

'message' should not end with a new-line, because this function will add
    one itself."""

err_msg = "%s: %s" % (PROGRAM_NAME, message)
    if err_no:
        err_msg += " (%s)" % ovs_retval_to_string(err_no)

sys.stderr.write("%s\n" % err_msg)
    if vlog:
        vlog.err(err_msg)

def ovs_fatal(*args, **kwargs):
    """Prints 'message' on stderr and emits an ERROR level log message to
    'vlog' if supplied.  If 'err_no' is nonzero, then it is formatted with
    ovs_retval_to_string() and appended to the message inside parentheses.
    Then, terminates with exit code 1 (indicating a failure).

'message' should not end with a new-line, because this function will add
    one itself."""

ovs_error(*args, **kwargs)
    sys.exit(1)

${this.title}

Code Editor : util.py