Question

2013年6月25日更新）尝试使用pip安装不同的软件包时，我看到同样的错误，表明软件包可能与此问题无关。

开启QNX我在运行pip时看到以下错误。

# pip install -U catkin_pkg 
Downloading/unpacking catkin-pkg
  Running setup.py egg_info for package catkin-pkg

Requirement already up-to-date: argparse in /usr/pkg/lib/python2.7/site-packages (from catkin-pkg)
Requirement already up-to-date: docutils in /usr/pkg/lib/python2.7/site-packages (from catkin-pkg)
Requirement already up-to-date: python-dateutil in /usr/pkg/lib/python2.7/site-packages (from catkin-pkg)
Requirement already up-to-date: six in /usr/pkg/lib/python2.7/site-packages (from python-dateutil->catkin-pkg)
Installing collected packages: catkin-pkg
  Running setup.py install for catkin-pkg
    Error [Errno 89] Function not implemented while executing command /usr/qnx650/host/qnx6/x86/usr/bin/python -c "import setuptools;__file__='/tmp/pip-build-n130s/catkin-pkg/setup.py';exec(compile(open(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-XhRdBe-record/install-record.txt --single-version-externally-managed
Exception:
Traceback (most recent call last):
  File "/usr/pkg/lib/python2.7/site-packages/pip-1.3-py2.7.egg/pip/basecommand.py", line 139, in main
    status = self.run(options, args)
  File "/usr/pkg/lib/python2.7/site-packages/pip-1.3-py2.7.egg/pip/commands/install.py", line 271, in run
    requirement_set.install(install_options, global_options, root=options.root_path)
  File "/usr/pkg/lib/python2.7/site-packages/pip-1.3-py2.7.egg/pip/req.py", line 1185, in install
    requirement.install(install_options, global_options, *args, **kwargs)
  File "/usr/pkg/lib/python2.7/site-packages/pip-1.3-py2.7.egg/pip/req.py", line 592, in install
    cwd=self.source_dir, filter_stdout=self._filter_install, show_stdout=False)
  File "/usr/pkg/lib/python2.7/site-packages/pip-1.3-py2.7.egg/pip/util.py", line 627, in call_subprocess
    cwd=cwd, env=env)
  File "/usr/pkg/lib/python2.7/subprocess.py", line 711, in __init__
    errread, errwrite)
  File "/usr/pkg/lib/python2.7/subprocess.py", line 1205, in _execute_child
    self.pid = os.fork()
OSError: [Errno 89] Function not implemented
Storing complete log in /root/.pip/pip.log

第一次运行此命令时，如果未安装argparse，docutils，python-dateutil和six等依赖组件，则会发生同样的错误，但是检查这些必需组件的部分。现在我已经逐个安装它们，它似乎发生在我自己安装的pkg上（即。catkin_pkg）。

在python的控制台上，我认为原因来源的os.fork()行为不同。因此，我甚至不确定错误是否发生在os.fork()。

# python
Python 2.7.4 (default, Jun 21 2013, 22:33:48) 
[GCC 4.4.2] on qnx6
Type "help", "copyright", "credits" or "license" for more information.
>>> import os
>>> os.fork()
18804790
>>> 0
sem_wait: Invalid argument

如何避免此错误？谢谢！

使用QNX 6.5.0 SDP SP1，pip版本为1.3（its source on github），同时source of catkin_pkg。

Answer 1

我以某种方式弄明白了。运行pip WITH -U选项会安装软件包（安装日志位于底部以供参考）。

......但为什么......？ pip的帮助信息对我来说似乎没有意义：

$ pip install --help
:
Install Options:
:
  -U, --upgrade   Upgrade all packages to the newest available version. This process is recursive regardless of whether a dependency is already satisfied.

pip安装日志：

$ pip install catkin_pkg    
Downloading/unpacking catkin-pkg
  Running setup.py egg_info for package catkin-pkg

Requirement already satisfied (use --upgrade to upgrade): argparse in /usr/pkg/lib/python2.7/site-packages (from catkin-pkg)
Requirement already satisfied (use --upgrade to upgrade): docutils in /usr/pkg/lib/python2.7/site-packages (from catkin-pkg)
Requirement already satisfied (use --upgrade to upgrade): python-dateutil in /usr/pkg/lib/python2.7/site-packages (from catkin-pkg)
Requirement already satisfied (use --upgrade to upgrade): six in /usr/pkg/lib/python2.7/site-packages (from python-dateutil->catkin-pkg)
Installing collected packages: catkin-pkg
  Running setup.py install for catkin-pkg
    changing mode of build/scripts-2.7/catkin_create_pkg from 664 to 775
    changing mode of build/scripts-2.7/catkin_generate_changelog from 664 to 775
    changing mode of build/scripts-2.7/catkin_tag_changelog from 664 to 775
    changing mode of build/scripts-2.7/catkin_test_changelog from 664 to 775

    changing mode of /usr/pkg/bin/catkin_create_pkg to 775
    changing mode of /usr/pkg/bin/catkin_generate_changelog to 775
    changing mode of /usr/pkg/bin/catkin_tag_changelog to 775
    changing mode of /usr/pkg/bin/catkin_test_changelog to 775
Successfully installed catkin-pkg
Cleaning up...

错误[Errno 89]执行命令python setup.py egg_info时未实现该功能

1 个答案: