Under Tru64 (version 5.1a, and probably others), when a
Python script is structured like so:

    #!/something/bin/python
    import sys
    print sys.prefix

the calculation of prefix in getpath.c won't work
correctly.  The reason is that argv[0] will be 'python'
rather than '/something/bin/python' (as it would be
under, say, Linux).

The code happens to work correctly in some simple
scenarios, but fails in a pretty mysterious way if one
has a different python in one's PATH than the one in
the #! line.  So, for example, if my PATH=/usr/bin and
there is a /usr/bin/python, then if I run the script
above, sys.prefix will be set to '/usr' instead of
'/something' and the wrong module path will be set up, etc.

It would be much better to simply obey the compiled
PREFIX instead, at least in the case where argv[0] has
no slashes.

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user_id=21627

Is there any way for a binary to find out its location on
disk, on Tru64?

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user_id=555

I hunted around in the man pages and googled and I couldn't
find much.  There is a proc ioctl PIOCOPENM (see
http://www.advogato.org/person/jum/diary.html?start=34)
which will give you an fd to the executable, but I don't
know of any way to map that back to a filename.

We'd need confirmation, preferably with assistance from a Tru64 guru.

I'll go down to the cemetery and see if I can dig one up.  :-)

All of our Tru64 machines have been powered-down for over three years
now, so as far as I'm concerned you can mark this one as no longer relevant.

Mike,
Thanks for the feedback (and laugh!). I'll close this one soon, unless
someone requests to keep open.