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From: peter@citylink.dinoex.sub.org (Peter Much)
Subject: Re: porting Linux apps to BSD !
Organization: Buero fuer Sektenforschung und Qualitaetspruefung in der Esoterik
Message-ID: <DDy17I.1ow@citylink.dinoex.sub.org>
References: <aak2.808728796@Ra.MsState.Edu> <41g4do$3cq@agate.berkeley.edu> <DDuFps.2t6@citylink.dinoex.sub.org> <41kidg$fpj@bonnie.tcd-dresden.de>
Date: Sun, 27 Aug 1995 00:26:05 GMT
Lines: 24
In article <41kidg$fpj@bonnie.tcd-dresden.de>,
J Wunsch <joerg_wunsch@uriah.heep.sax.de> wrote:
>But i think that (null) is just a feature of the printf family: before
>dereferencing a string pointer, it is being checked for a NULL
>dereference. Quite as useful as a core dump, since you can also
>easily spot where it happens (IMHO).
You're right! That string is just between the hex-chars tables in a
(static linked) binary; nm tells that belonging to some vfprintf stuff.
strcmp(NULL, NULL) segmentation faults on FreeBSD (somewhere >2.0)
and NetBSD 1.0, runs on Linux with libc 4.5.26, and segfaults on another
Linux with libc 4.6.27. To be precise, strcmp(0,0) segfaults on FreeBSD;
NULL won't compile since /usr/include/sys points into the (tar'ed&com-
pressed) sourcetree... ;)
printf("%s", NULL) prints "(null)" on FreeBSD, NetBSD and both Linux'.
Peter
--
UNIX is a religion. Religions cannot be trademarked.
Write to: Peter Much * Koelnische Str. 22 * D-34117 Kassel * +49-561-774961
peter@citylink.dinoex.sub.org much@hrz.uni-kassel.de p.much@asco.nev.sub.de