Re: [gentoo-user] bash stopped running python scripts...

[Mike Edenfield <kutulu@kutulu.org>]

On 8/3/2009 5:48 PM, Alan McKinnon wrote:
> On Monday 03 August 2009 23:22:08 Mike Edenfield wrote:
>> On 8/3/2009 5:03 PM, Alan McKinnon wrote:
>>> On Monday 03 August 2009 22:56:51 Mike Edenfield wrote:
>>>> kutulu@apollo ~ $ cat test.py
>>>> #!/usr/bin/python
>>>> import sys
>>>> print "Python Ok."
>>>> kutulu@apollo ~ $ ./test.py
>>>> X connection to localhost:11.0 broken (explicit kill or server
>>>> shutdown). ./test.py: line 3: print: command not found
>>>> kutulu@apollo ~ $ python ./test.py
>>>> Python Ok.
>>>> kutulu@apollo ~ $
>>>
>>> Did you recently merge python-3 and were so foolish as to make it the
>>> default?
>>
>> I did emerge python-3, but then unmerged it almost immediately, and it
>> was never the default.  Python was already broken when I merged python
>> 3.1, which I did to see if it fixed anything, which of course it didn't.
>>
>>> What is /usr/bin/python? and what version is it (-V)?
>>
>> root@apollo ~ # /usr/bin/python -V
>> Python 2.6.2
>> root@apollo ~ # cat /usr/bin/python
>> #!/bin/bash
>> # Gentoo Python wrapper script
>>
>> [[ "${EPYTHON}" =~ (/|^python$) ]]&&  EPYTHON="python2.6"
>> "${0%/*}/${EPYTHON:-python2.6}" "$@"
>>
>> Is that supposed to be that way?  I vaguely recall from my Tcl days that
>> tclsh used to cause problems with the #! lines when it was a shell
>> script, and that you had to use some odd exec trick to get tcl shell
>> scripts to run.  Is that still true?
>
> I have the identical file, it works here.

That's very odd, as everything I've read over the past hour indicates 
that it's not *supposed* to work if you put a shell script in that line, 
but that's clearly not always true.

What's the #! line in your /usr/bin/emerge file?

> Your original post has a "X connection to localhost:11.0 broken" error,
> which is mighty unusual. The error is common enough, but has nothing to do
> with python.

I know where that particular error is coming from.  The first 
non-comment line in /usr/bin/emerge is "import sys".  Since bash is 
interpreting the script instead of python, when it gets to that line, it 
runs ImageMagick's "import" command.  It just indicates that bash 
ignored the #! line and kept going.

The bug Remy sent me to did have two working solutions: replacing the 
shell script with a symlink, or replacing "#!/usr/bin/python" with 
"#!/usr/bin/env python" in emerge/ebuild, both of which point the #! 
line at a real executable.  I'm now curious why that shell script works 
for anyone.

--Mike