installer.py 文件源码

def getEnvironment(scope, name):
    assert scope in ('user', 'system')

    value = ''

    if platform.system() == 'Windows':
        root, subkey = getWindowsEnvironmentKey(scope)
        key = winreg.OpenKey(root, subkey, 0, winreg.KEY_READ)

        try:
            value, _ = winreg.QueryValueEx(key, name)
        except WindowsError:
            value = ''
    else:
        if name.lower() == 'uid':
            return str(os.geteuid())

        if len(os_user_name) > 0:
            ret, cret = syscommand('su -l %s -c \'echo ${%s}\'' % (os_user_name, name), True)
            if len(ret) > 0:
                value = ret[0].strip()
        else:
            value = os.environ.get(name, "")

    return value