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2013 年 6 月 25 日更新）我在尝试使用 安装不同的软件包时看到相同的错误pip，这表明该软件包可能与该问题无关。

我QNX在运行时看到以下错误pip。

# 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

我第一次运行此命令时，未安装依赖的组件，例如argparse，和，发生了同样的错误，但是在检查这些必需组件的部分。现在我已经一一安装了它们，它似乎发生在我自己安装的 pkg 上（即。）。docutilspython-dateutilsixcatkin_pkg

在 python 的控制台上，os.fork()我假设原因的来源，行为不同。因此，我什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

我怎样才能避免这个错误？谢谢！

使用QNX6.5.0 SDP SP1，pip版本为 1.3（它的来源在 github 上），也是catkin_pkg 的来源。

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1 回答 1

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I somehow figured it out. Running pip WITHOUT -U option gets the package installed (install log is at the bottom for the reference).

...But why...? Help message of pip's doesn't seem to make sense to me:

$ 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.

Log of installation by pip:

$ 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...
于 2013-06-25T14:06:41.047 回答