cmdexec.py 文件源码

def cmdexec(cmd):
    """ return unicode output of executing 'cmd' in a separate process.

    raise cmdexec.Error exeception if the command failed.
    the exception will provide an 'err' attribute containing
    the error-output from the command.
    if the subprocess module does not provide a proper encoding/unicode strings
    sys.getdefaultencoding() will be used, if that does not exist, 'UTF-8'.
    """
    process = subprocess.Popen(cmd, shell=True,
            universal_newlines=True,
            stdout=subprocess.PIPE, stderr=subprocess.PIPE)
    out, err = process.communicate()
    if sys.version_info[0] < 3: # on py3 we get unicode strings, on py2 not
        try:
            default_encoding = sys.getdefaultencoding() # jython may not have it
        except AttributeError:
            default_encoding = sys.stdout.encoding or 'UTF-8'
        out = unicode(out, process.stdout.encoding or default_encoding)
        err = unicode(err, process.stderr.encoding or default_encoding)
    status = process.poll()
    if status:
        raise ExecutionFailed(status, status, cmd, out, err)
    return out