def exe()

in ambari-metrics-host-monitoring/src/main/python/psutil/psutil/__init__.py [0:0]

• 26 lines of code
• 14 McCabe index (conditional complexity)

    def exe(self):
        """The process executable as an absolute path.
        May also be an empty string.
        The return value is cached after first call.
        """
        def guess_it(fallback):
            # try to guess exe from cmdline[0] in absence of a native
            # exe representation
            cmdline = self.cmdline()
            if cmdline and hasattr(os, 'access') and hasattr(os, 'X_OK'):
                exe = cmdline[0]  # the possible exe
                # Attempt to guess only in case of an absolute path.
                # It is not safe otherwise as the process might have
                # changed cwd.
                if (os.path.isabs(exe)
                        and os.path.isfile(exe)
                        and os.access(exe, os.X_OK)):
                    return exe
            if isinstance(fallback, AccessDenied):
                raise fallback
            return fallback

        if self._exe is None:
            try:
                exe = self._proc.exe()
            except AccessDenied:
                err = sys.exc_info()[1]
                return guess_it(fallback=err)
            else:
                if not exe:
                    # underlying implementation can legitimately return an
                    # empty string; if that's the case we don't want to
                    # raise AD while guessing from the cmdline
                    try:
                        exe = guess_it(fallback=exe)
                    except AccessDenied:
                        pass
                self._exe = exe
        return self._exe