commit 55070f5d966f09256c603c3a82fab9b034430c6f
Author: Jack Jansen <jack.jansen@cwi.nl>
Date:   Sun Dec 2 23:56:28 2001 +0000

    Changed logic for finding python home in Mac OS X framework Pythons.
    Now sys.executable points to the executable again, in stead of to
    the shared library. The latter is used only for locating the python
    home.

        strcpy(argv0_path, progpath);
        
#if HAVE_READLINK
        {
                char tmpbuffer[MAXPATHLEN+1];
                int linklen = readlink(progpath, tmpbuffer, MAXPATHLEN);
                if (linklen != -1) {
                        /* It's not null terminated! */
                        tmpbuffer[linklen] = '\0';
                        if (tmpbuffer[0] == SEP)
                                strcpy(argv0_path, tmpbuffer);
                        else {
                                /* Interpret relative to progpath */
                                reduce(argv0_path);
                                join(argv0_path, tmpbuffer);
                        }
                }
        }
#endif /* HAVE_READLINK */

commit 305e5d0d4f3a24f199cfea4f9b0e53980de79847
Author: Guido van Rossum <guido@python.org>
Date:   Fri Apr 11 17:18:45 1997 +0000

    Completely revamped the way the default path is constructed.
    
    Idea and first three implementation rounds due to Barry -- after that
    I spent another day on it, hopefully it's enough for now :-)
    
    (Wait for the checkin to Setup.in.)