由于Errno 1，无法使用'--always-copy'标志设置virtualenv [英] Unable to setup virtualenv with '--always-copy' flag due to Errno 1

问题描述

我正在尝试运行此命令

$ virtualenv --always-copy venv

然后我得到了所有这些错误:

Then I got all these errors:

        shutil.Error: [('/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload/_Drag.so', 
'/Users/antkong/dev/zeetings/venv/lib/python2.7/lib-dynload/_Drag.so', "[Errno 1] Operation not permitted:
 '/Users/antkong/dev/zeetings/venv/lib/python2.7/lib-dynload/_Drag.so'"), ('/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload/_Ctl.so', 
'/Users/antkong/dev/zeetings/venv/lib/python2.7/lib-dynload/_Ctl.so', "[Errno 1] Operation not permitted: 
'/Users/antkong/dev/zeetings/venv/lib/python2.7/lib-dynload/_Ctl.so'"), ('/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload/imageop.so', 
'/Users/antkong/dev/zeetings/venv/lib/python2.7/lib-dynload/imageop.so', "[Errno 1] Operation not permitted: 
'/Users/antkong/dev/zeetings/venv/lib/python2.7/lib-dynload/imageop.so'"), 
('/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload/_Scrap.so', 
'/Users/antkong/dev/zeetings/venv/lib/python2.7/lib-dynload/_Scrap.so', "[Errno 1] Operation not permitted: 
'/Users/antkong/dev/zeetings/venv/lib/python2.7/lib-dynload/_Scrap.so'"), ('/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload/_testcapi.so', 
'/Users/antkong/dev/zeetings/venv/lib/python2.7/lib-dynload/_testcapi.so', "[Errno 1] Operation not permitted: 
'/Users/antkong/dev/zeetings/venv/lib/python2.7/lib-dynload/_testcapi.so'"), 
('/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload/unicodedata.so', 
'/Users/antkong/dev/zeetings/venv/lib/python2.7/lib-dynload/unicodedata.so', "[Errno 1] Operation not permitted: '/Users/antkong/dev/zeetings/venv/lib/python2.7/lib-dynload/unicodedata.so'"),

我检查了源文件的权限.都可读

I checked the permission of the source file. It is all readable

$ ls -l '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload/_Drag.so'
-rwxr-xr-x  1 root  wheel  55936  3 Oct 16:50 /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload/_Drag.so

在运行命令之前，我始终确保venv不存在.

I have always ensured venv does not exist before running the command.

那为什么会失败?

版本信息:

$ python --version
Python 2.7.10
$ pip --version
pip 9.0.1 from /Library/Python/2.7/site-packages (python 2.7)

推荐答案

virtualenv使用shutil.copytree复制文件，copytree将使用copystat将src文件标志复制到目标，但是macOS系统python文件具有特殊的含义标志0x80000，普通用户甚至root用户都无法设置.

virtualenv use shutil.copytree to copy files, copytree will copy src file flags to destination with copystat, but the macOS system python files have a special flag 0x80000, which can not set by a normal user, even root.

如果您安装的带有自制软件的python没有此标志，则此命令有效.

if you installed a python with homebrew, which does not have this flag, this command would work.

更新:

根据 stat .h 0x80000是SF_RESTRICTED:

#define SF_RESTRICTED   0x00080000  /* restricted access */

这是优胜美地系统完整性保护的新功能.

it is something new with Yosemite System Integrity Protection.

您可能会在ls -lO输出中看到restricted标志:

you could see restricted flag in with ls -lO output:

$ ls -lO '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload/_Drag.so'
-rwxr-xr-x  1 root  wheel  restricted,compressed 55888 Jul 15 12:21 /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload/_Drag.so

如果您尝试在命令行中进行设置:

if you try to set it in the command line:

$ sudo chflags restricted tmp
chflags: tmp: Operation not permitted

我认为python shutil.copystat应该排除此标志，因为没有Apple赋予的特殊权利，就无法在用户区中设置它.

I think python shutil.copystat should exclude this flag as there is no way to set it in userland without special entitlement assigned by Apple.

这篇关于由于Errno 1，无法使用'--always-copy'标志设置virtualenv的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！