Gestionnaire de fichiers - Editer - /usr/lib/python2.7/site-packages/vdo/vdomgmnt/Utils.py
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# # Copyright (c) 2018 Red Hat, Inc. # # This program is free software; you can redistribute it and/or # modify it under the terms of the GNU General Public License # as published by the Free Software Foundation; either version 2 # of the License, or (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA # 02110-1301, USA. # """ Utils - miscellaneous utilities for the VDO manager $Id: //eng/vdo-releases/magnesium/src/python/vdo/vdomgmnt/Utils.py#1 $ """ from utils import CommandError, runCommand import distutils.spawn import errno import os import signal import time class Utils(object): """Utils contains miscellaneous utilities.""" KiB = 1024 MiB = 1024 * KiB GiB = 1024 * MiB TiB = 1024 * GiB PiB = 1024 * TiB ###################################################################### # Public methods ###################################################################### @staticmethod def abspathPath(path): """Takes a path or a colon-separated list of paths and makes each one an absolute path. Paths that don't exist are left alone.""" return os.pathsep.join([os.path.abspath(p) for p in path.split(os.pathsep)]) ###################################################################### @staticmethod def appendToPath(path): """Appends a directory or directories to the current PATH. Arguments: path (str): A directory or colon-separated list of directories. """ os.environ['PATH'] += os.pathsep + path ###################################################################### @staticmethod def isPowerOfTwo(i): """Returns True iff its argument is a power of two.""" return (i != 0) and ((i & (i - 1)) == 0) ###################################################################### @classmethod def killProcess(cls, pid): """Kills a process and waits for it to die. Arguments: pid: process id to kill Throws: Any unexpected OS error """ try: os.kill(pid, signal.SIGTERM) while True: time.sleep(1) os.kill(pid, 0) except OSError as e: if e.errno != errno.ESRCH: raise e ###################################################################### @staticmethod def maxNum(a, b): """Returns the maximum of two numbers.""" if a > b: return a return b ###################################################################### @staticmethod def which(cmd): """Finds the full path to a command. Arguments: cmd (str): The command to search for. Returns: The full path as a string, or None if the command is not found. """ return distutils.spawn.find_executable(cmd) ###################################################################### # Overridden methods ###################################################################### def __init__(self): pass
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