Replacement su for SCO Unix

[Joachim Ott Munich-Germany]

In article <bashsco at dce.ie>, em at dce.ie (Eamonn McManus) writes:
> ...
> X    const char *user = "root", *shell = NULL;
                                  ^^^^^^^^^^^^^
> ...
> X       The stupid Microsoft compiler warns about the ?: below.  Ignore it.
> X       Better still, use GNU C. */
> X    su(pwd, login, shell ? shell : pwd->pw_shell, argv + i - 1);
                      ^^^^^^^

Not really stupid (i must admit to microsoft). 'shell ?' means
'shell != 0' and *not* 'shell != NULL'. You should not rely on
NULL being the same as 0. Try the line with '(shell != NULL) ?',
the warning should be gone.

Tell GNU-people to fix this in their compiler.