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Groups > comp.programming > #9676

Re: C is not a low level language

From Keith Thompson <kst-u@mib.org>
Newsgroups comp.lang.c, comp.programming, comp.sys.raspberry-pi
Subject Re: C is not a low level language
Followup-To comp.lang.c
Date 2019-02-24 17:59 -0800
Organization None to speak of
Message-ID <lna7ikpr05.fsf@kst-u.example.com> (permalink)
References (9 earlier) <q4ug9o$q6j$1@gioia.aioe.org> <q4un6q$5bo$1@dont-email.me> <q4upp6$5k2$1@gioia.aioe.org> <q4ur5a$v7v$1@dont-email.me> <q4uv8j$v0m$1@gioia.aioe.org>

Cross-posted to 3 groups.

Followups directed to: comp.lang.c

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"R.Wieser" <address@not.available> writes:
[...]
> True.  But that only goes as far as the programmer can imagine such attacks. 
> "strncpy" is ment as a "last ditch" effort to safeguard against the 
> /unforseen/ circumstances which could lead to memory/stack being clobbered. 
> My suggestion to provide it an argument that is one less than what the 
> buffer can actually hold is just an extension on that.

No, strncpy is designed to work with a specific (and, in recent
history, rare) data structure, namely a fixed-length character
array containing some bytes of meaningful data padded to the end
by zero or more null bytes.  (I believe it was used to store file
names in Unix directory entries.)

(followups to comp.lang.c only)

-- 
Keith Thompson (The_Other_Keith) kst-u@mib.org  <http://www.ghoti.net/~kst>
Will write code for food.
void Void(void) { Void(); } /* The recursive call of the void */

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Thread

Re: C is not a low level language "Mr. Man-wai Chang" <toylet.toylet@gmail.com> - 2019-02-24 12:40 +0800
  Re: C is not a low level language The Natural Philosopher <tnp@invalid.invalid> - 2019-02-24 05:16 +0000
    Re: C is not a low level language "Mr. Man-wai Chang" <toylet.toylet@gmail.com> - 2019-02-24 13:20 +0800
      Re: C is not a low level language "Mr. Man-wai Chang" <toylet.toylet@gmail.com> - 2019-02-24 13:24 +0800
      Re: C is not a low level language "Mr. Man-wai Chang" <toylet.toylet@gmail.com> - 2019-02-24 19:45 +0800
      Re: C is not a low level language Richard Heathfield <rjh@cpax.org.uk> - 2019-02-24 13:09 +0000
        Re: C is not a low level language The Natural Philosopher <tnp@invalid.invalid> - 2019-02-24 14:38 +0000
          Re: C is not a low level language Richard Heathfield <rjh@cpax.org.uk> - 2019-02-24 15:18 +0000
            Re: C is not a low level language "R.Wieser" <address@not.available> - 2019-02-24 17:21 +0100
              Re: C is not a low level language The Natural Philosopher <tnp@invalid.invalid> - 2019-02-24 17:43 +0000
                Re: C is not a low level language "R.Wieser" <address@not.available> - 2019-02-24 20:17 +0100
              Re: C is not a low level language Richard Heathfield <rjh@cpax.org.uk> - 2019-02-24 18:19 +0000
                Re: C is not a low level language "R.Wieser" <address@not.available> - 2019-02-24 20:02 +0100
                Re: C is not a low level language Richard Heathfield <rjh@cpax.org.uk> - 2019-02-24 19:26 +0000
                Re: C is not a low level language "R.Wieser" <address@not.available> - 2019-02-24 21:36 +0100
                Re: C is not a low level language Richard Heathfield <rjh@cpax.org.uk> - 2019-02-24 20:47 +0000
                Re: C is not a low level language The Natural Philosopher <tnp@invalid.invalid> - 2019-02-24 21:10 +0000
                Re: C is not a low level language "R.Wieser" <address@not.available> - 2019-02-25 08:25 +0100
                Re: C is not a low level language Richard Heathfield <rjh@cpax.org.uk> - 2019-02-25 12:24 +0000
                Re: C is not a low level language "R.Wieser" <address@not.available> - 2019-02-25 17:04 +0100
                Re: C is not a low level language Richard Heathfield <rjh@cpax.org.uk> - 2019-02-25 16:52 +0000
                Re: C is not a low level language Keith Thompson <kst-u@mib.org> - 2019-02-24 17:59 -0800
                Re: C is not a low level language "Pascal J. Bourguignon" <pjb@informatimago.com> - 2019-02-25 08:46 +0100
                Re: C is not a low level language "R.Wieser" <address@not.available> - 2019-02-25 09:36 +0100
                Re: C is not a low level language "Pascal J. Bourguignon" <pjb@informatimago.com> - 2019-02-25 10:13 +0100
                Re: C is not a low level language "R.Wieser" <address@not.available> - 2019-02-26 09:56 +0100
                Re: C is not a low level language Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-02-25 14:12 +0000
                Re: C is not a low level language Ahem A Rivet's Shot <steveo@eircom.net> - 2019-02-25 12:20 +0000
                Re: C is not a low level language Keith Thompson <kst-u@mib.org> - 2019-02-25 13:36 -0800
                Re: C is not a low level language Wouter Verhelst <w@uter.be> - 2019-02-25 10:29 +0200
                Re: C is not a low level language "R.Wieser" <address@not.available> - 2019-02-25 09:41 +0100
                Re: C is not a low level language Wouter Verhelst <w@uter.be> - 2019-02-25 10:55 +0200
                Re: C is not a low level language "R.Wieser" <address@not.available> - 2019-02-25 10:24 +0100
                Re: C is not a low level language The Natural Philosopher <tnp@invalid.invalid> - 2019-02-24 21:03 +0000
                Re: C is not a low level language "R.Wieser" <address@not.available> - 2019-02-25 08:58 +0100
                Re: C is not a low level language "Pascal J. Bourguignon" <pjb@informatimago.com> - 2019-02-25 09:40 +0100
                Re: C is not a low level language "R.Wieser" <address@not.available> - 2019-02-25 10:01 +0100
              Re: C is not a low level language Keith Thompson <kst-u@mib.org> - 2019-02-24 12:55 -0800
                Re: C is not a low level language "R.Wieser" <address@not.available> - 2019-02-25 08:31 +0100
            Re: C is not a low level language The Natural Philosopher <tnp@invalid.invalid> - 2019-02-24 17:42 +0000
              Re: C is not a low level language Richard Heathfield <rjh@cpax.org.uk> - 2019-02-24 18:19 +0000
            Re: C is not a low level language Bill Findlay <findlaybill@blueyonder.co.uk> - 2019-02-24 17:56 +0000
              Re: C is not a low level language Richard Heathfield <rjh@cpax.org.uk> - 2019-02-24 18:23 +0000
                Re: C is not a low level language The Natural Philosopher <tnp@invalid.invalid> - 2019-02-24 20:58 +0000
              Re: C is not a low level language The Natural Philosopher <tnp@invalid.invalid> - 2019-02-24 20:52 +0000
                Re: C is not a low level language Bill Findlay <findlaybill@blueyonder.co.uk> - 2019-02-25 16:31 +0000
              Re: C is not a low level language Keith Thompson <kst-u@mib.org> - 2019-02-25 14:01 -0800
                Re: C is not a low level language scott@slp53.sl.home (Scott Lurndal) - 2019-02-25 23:04 +0000
                Re: C is not a low level language Keith Thompson <kst-u@mib.org> - 2019-02-25 15:53 -0800
                Re: C is not a low level language Bill Findlay <findlaybill@blueyonder.co.uk> - 2019-02-28 16:07 +0000
              Re: C is not a low level language Björn Lundin <b.f.lundin@gmail.com> - 2019-02-25 20:50 +0100
                Re: C is not a low level language Bill Findlay <findlaybill@blueyonder.co.uk> - 2019-02-28 16:04 +0000
                Re: C is not a low level language "J. P. Gilliver (John)" <G6JPG-255@255soft.uk> - 2019-02-28 16:25 +0000
                Re: C is not a low level language "Mayayana" <mayayana@invalid.nospam> - 2019-02-28 11:56 -0500
                Re: C is not a low level language "NY" <me@privacy.net> - 2019-02-28 19:45 +0000
              Re: C is not a low level language Bart <bc@freeuk.com> - 2019-02-25 17:55 +0000
                Re: C is not a low level language Bill Findlay <findlaybill@blueyonder.co.uk> - 2019-02-28 16:03 +0000
                Re: C is not a low level language Keith Thompson <kst-u@mib.org> - 2019-02-28 11:25 -0800
                Re: C is not a low level language Bart <bc@freeuk.com> - 2019-02-28 19:30 +0000
          Re: C is not a low level language Jasen Betts <jasen@xnet.co.nz> - 2019-02-24 20:47 +0000
            Re: C is not a low level language The Natural Philosopher <tnp@invalid.invalid> - 2019-02-24 21:29 +0000
              Re: C is not a low level language Jasen Betts <jasen@xnet.co.nz> - 2019-02-25 20:16 +0000
      Re: C is not a low level language Keith Thompson <kst-u@mib.org> - 2019-02-24 12:53 -0800
      Re: C is not a low level language Wouter Verhelst <w@uter.be> - 2019-02-25 09:49 +0200
    Re: C is not a low level language Björn Lundin <b.f.lundin@gmail.com> - 2019-02-25 21:07 +0100
      Re: C is not a low level language Ahem A Rivet's Shot <steveo@eircom.net> - 2019-02-25 22:59 +0000
        Re: C is not a low level language Björn Lundin <b.f.lundin@gmail.com> - 2019-02-26 09:57 +0100
          Re: C is not a low level language Ahem A Rivet's Shot <steveo@eircom.net> - 2019-02-26 09:59 +0000
  Re: C is not a low level language Eric Stevens <eric.stevens@sum.co.nz> - 2019-02-24 19:54 +1300
    Re: C is not a low level language Ahem A Rivet's Shot <steveo@eircom.net> - 2019-02-24 07:56 +0000
      Re: C is not a low level language Eric Stevens <eric.stevens@sum.co.nz> - 2019-02-24 21:58 +1300
        Re: C is not a low level language "A. Dumas" <alexandre@dumas.fr.invalid> - 2019-02-24 10:57 +0100
        Re: C is not a low level language Ahem A Rivet's Shot <steveo@eircom.net> - 2019-02-24 10:13 +0000
        Re: C is not a low level language The Natural Philosopher <tnp@invalid.invalid> - 2019-02-24 10:47 +0000
          Re: C is not a low level language "Mayayana" <mayayana@invalid.nospam> - 2019-02-24 08:48 -0500
            Re: C is not a low level language The Natural Philosopher <tnp@invalid.invalid> - 2019-02-24 14:42 +0000
            Re: C is not a low level language Ahem A Rivet's Shot <steveo@eircom.net> - 2019-02-25 07:15 +0000
              Re: C is not a low level language "Mayayana" <mayayana@invalid.nospam> - 2019-02-25 09:25 -0500
                Re: C is not a low level language Ahem A Rivet's Shot <steveo@eircom.net> - 2019-02-25 15:03 +0000
                Re: C is not a low level language "Mayayana" <mayayana@invalid.nospam> - 2019-02-25 12:10 -0500
                Re: C is not a low level language Ahem A Rivet's Shot <steveo@eircom.net> - 2019-02-25 17:58 +0000
                Re: C is not a low level language Axel Berger <Spam@Berger-Odenthal.De> - 2019-02-25 17:44 +0100
                Re: C is not a low level language Wouter Verhelst <w@uter.be> - 2019-02-25 19:18 +0200
            Re: C is not a low level language Wouter Verhelst <w@uter.be> - 2019-02-25 10:35 +0200
              Re: C is not a low level language "J. P. Gilliver (John)" <G6JPG-255@255soft.uk> - 2019-02-25 10:44 +0000
                Re: C is not a low level language Richard Heathfield <rjh@cpax.org.uk> - 2019-02-25 12:29 +0000
                Re: C is not a low level language Ahem A Rivet's Shot <steveo@eircom.net> - 2019-02-25 14:26 +0000
                Re: C is not a low level language "NY" <me@privacy.net> - 2019-02-25 17:08 +0000
                Re: C is not a low level language Wouter Verhelst <w@uter.be> - 2019-02-25 20:08 +0200
                Re: C is not a low level language Ahem A Rivet's Shot <steveo@eircom.net> - 2019-02-25 18:00 +0000
                Re: C is not a low level language Keith Thompson <kst-u@mib.org> - 2019-02-27 22:37 -0800
                Re: C is not a low level language Keith Thompson <kst-u@mib.org> - 2019-02-28 02:25 -0800
                Re: C is not a low level language Diesel <nobody@haph.org> - 2019-03-05 04:29 +0000
              Re: C is not a low level language Ahem A Rivet's Shot <steveo@eircom.net> - 2019-02-25 12:27 +0000
              Re: C is not a low level language "Mayayana" <mayayana@invalid.nospam> - 2019-02-25 09:36 -0500
                Re: C is not a low level language Ahem A Rivet's Shot <steveo@eircom.net> - 2019-02-25 15:05 +0000
                Re: C is not a low level language Wouter Verhelst <w@uter.be> - 2019-02-25 19:20 +0200
                Re: C is not a low level language Ahem A Rivet's Shot <steveo@eircom.net> - 2019-02-25 23:02 +0000
                Re: C is not a low level language Ahem A Rivet's Shot <steveo@eircom.net> - 2019-02-26 06:52 +0000
                Re: C is not a low level language Wouter Verhelst <w@uter.be> - 2019-02-26 12:41 +0200
                Re: C is not a low level language Ahem A Rivet's Shot <steveo@eircom.net> - 2019-02-26 12:20 +0000
                Re: C is not a low level language David Brown <david.brown@hesbynett.no> - 2019-02-26 14:01 +0100
                Re: C is not a low level language "Mayayana" <mayayana@invalid.nospam> - 2019-02-26 08:48 -0500
                Re: C is not a low level language Björn Lundin <b.f.lundin@gmail.com> - 2019-02-26 19:20 +0100
              Re: C is not a low level language Wolf K <wolfmac@sympatico.ca> - 2019-02-25 10:04 -0500
        Re: C is not a low level language lonelydad <lonelydad58@gmail.com> - 2019-02-24 14:44 +0000
        Re: C is not a low level language "U-laptop\\Norah" <Norah@laptop.i-did-not-set--mail-host-address--so-tickle-me> - 2019-02-27 16:16 -0600
          Re: C is not a low level language Eric Stevens <eric.stevens@sum.co.nz> - 2019-03-01 12:12 +1300
            Re: C is not a low level language Richard Heathfield <rjh@cpax.org.uk> - 2019-03-01 00:19 +0000
      Re: C is not a low level language Gene Wirchenko <genew@telus.net> - 2019-02-24 19:59 -0800
        Re: C is not a low level language Bill Findlay <findlaybill@blueyonder.co.uk> - 2019-02-25 16:10 +0000
        Re: C is not a low level language Björn Lundin <b.f.lundin@gmail.com> - 2019-02-25 21:02 +0100
          Re: C is not a low level language Lars Enderin <lars.enderin@telia.com> - 2019-02-26 00:37 +0100
            Re: C is not a low level language Wolf K <wolfmac@sympatico.ca> - 2019-02-25 19:09 -0500
            Re: C is not a low level language Ahem A Rivet's Shot <steveo@eircom.net> - 2019-02-26 06:52 +0000
    Re: C is not a low level language T <T@invalid.invalid> - 2019-02-24 00:30 -0800
      Re: C is not a low level language T <T@invalid.invalid> - 2019-02-24 00:31 -0800
      Re: C is not a low level language Ahem A Rivet's Shot <steveo@eircom.net> - 2019-02-24 10:16 +0000
    Re: C is not a low level language "J. P. Gilliver (John)" <G6JPG-255@255soft.uk> - 2019-02-24 11:22 +0000
      Re: C is not a low level language "Mayayana" <mayayana@invalid.nospam> - 2019-02-24 08:51 -0500
        Re: C is not a low level language pyotr filipivich <phamp@mindspring.com> - 2019-02-24 07:20 -0800
          Re: C is not a low level language "J. P. Gilliver (John)" <G6JPG-255@255soft.uk> - 2019-02-24 15:35 +0000
            Re: C is not a low level language "Mayayana" <mayayana@invalid.nospam> - 2019-02-24 11:05 -0500
            Re: C is not a low level language pyotr filipivich <phamp@mindspring.com> - 2019-02-24 14:39 -0800
              Re: C is not a low level language Keith Thompson <kst-u@mib.org> - 2019-02-24 19:11 -0800
              Re: C is not a low level language Wolf K <wolfmac@sympatico.ca> - 2019-02-25 09:41 -0500
                Re: C is not a low level language "J. P. Gilliver (John)" <G6JPG-255@255soft.uk> - 2019-02-25 14:53 +0000
                Re: C is not a low level language Wolf K <wolfmac@sympatico.ca> - 2019-02-25 10:19 -0500
                Re: C is not a low level language David Brown <david.brown@hesbynett.no> - 2019-02-25 16:38 +0100
                Re: C is not a low level language Wolf K <wolfmac@sympatico.ca> - 2019-02-25 11:20 -0500
                Re: C is not a low level language "J. P. Gilliver (John)" <G6JPG-255@255soft.uk> - 2019-02-25 17:49 +0000
                Re: C is not a low level language David Brown <david.brown@hesbynett.no> - 2019-02-26 09:18 +0100
                Re: C is not a low level language nospam <nospam@nospam.invalid> - 2019-02-25 12:17 -0500
                Re: C is not a low level language Wouter Verhelst <w@uter.be> - 2019-02-25 20:25 +0200
                Re: C is not a low level language nospam <nospam@nospam.invalid> - 2019-02-25 13:40 -0500
                Re: C is not a low level language Wouter Verhelst <w@uter.be> - 2019-02-26 12:45 +0200
                Re: C is not a low level language nospam <nospam@nospam.invalid> - 2019-02-26 08:02 -0500
                Re: C is not a low level language Wolf K <wolfmac@sympatico.ca> - 2019-02-26 09:11 -0500
                Re: C is not a low level language Diesel <nobody@haph.org> - 2019-03-05 04:29 +0000
                Re: C is not a low level language David Brown <david.brown@hesbynett.no> - 2019-02-26 09:23 +0100
                Re: C is not a low level language nospam <nospam@nospam.invalid> - 2019-02-26 08:02 -0500
                Re: C is not a low level language Wouter Verhelst <w@uter.be> - 2019-02-26 17:57 +0200
                Re: C is not a low level language Diesel <nobody@haph.org> - 2019-03-05 04:29 +0000
                Re: C is not a low level language nospam <nospam@nospam.invalid> - 2019-02-25 17:42 -0500
                Re: C is not a low level language Bart <bc@freeuk.com> - 2019-02-25 22:33 +0000
                Re: C is not a low level language David Brown <david.brown@hesbynett.no> - 2019-02-26 09:30 +0100
                Re: C is not a low level language nospam <nospam@nospam.invalid> - 2019-02-25 12:17 -0500
                Re: C is not a low level language Keith Thompson <kst-u@mib.org> - 2019-02-25 13:52 -0800
                Re: C is not a low level language "NY" <me@privacy.net> - 2019-02-25 15:20 +0000
                Re: C is not a low level language nospam <nospam@nospam.invalid> - 2019-02-25 12:17 -0500
                Re: C is not a low level language Bart <bc@freeuk.com> - 2019-02-25 18:47 +0000
                Re: C is not a low level language nospam <nospam@nospam.invalid> - 2019-02-25 13:50 -0500
                Re: C is not a low level language Bart <bc@freeuk.com> - 2019-02-25 18:59 +0000
                Re: C is not a low level language Wouter Verhelst <w@uter.be> - 2019-02-25 20:15 +0200
                Re: C is not a low level language scott@slp53.sl.home (Scott Lurndal) - 2019-02-25 18:38 +0000
                Re: C is not a low level language Wouter Verhelst <w@uter.be> - 2019-02-26 12:49 +0200
                Re: C is not a low level language nospam <nospam@nospam.invalid> - 2019-02-25 13:40 -0500
                Re: C is not a low level language Wouter Verhelst <w@uter.be> - 2019-02-26 12:55 +0200
                Re: C is not a low level language scott@slp53.sl.home (Scott Lurndal) - 2019-02-26 16:29 +0000
                Re: C is not a low level language Diesel <nobody@haph.org> - 2019-03-05 04:29 +0000
                Re: C is not a low level language nospam <nospam@nospam.invalid> - 2019-03-04 23:43 -0500
                Re: C is not a low level language "NY" <me@privacy.net> - 2019-02-25 18:16 +0000
                Re: C is not a low level language "NY" <me@privacy.net> - 2019-02-25 17:44 +0000
                Re: C is not a low level language nospam <nospam@nospam.invalid> - 2019-02-25 13:05 -0500
                Re: C is not a low level language Robert Wessel <robertwessel2@yahoo.com> - 2019-02-26 00:51 -0600
                Re: C is not a low level language "Pascal J. Bourguignon" <pjb@informatimago.com> - 2019-02-26 10:58 +0100
                Re: C is not a low level language Robert Wessel <robertwessel2@yahoo.com> - 2019-02-26 10:53 -0600
                Re: C is not a low level language Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-02-26 17:49 +0000
                Re: C is not a low level language scott@slp53.sl.home (Scott Lurndal) - 2019-02-26 18:11 +0000
                Re: C is not a low level language Bart <bc@freeuk.com> - 2019-02-26 18:24 +0000
                Re: C is not a low level language "Pascal J. Bourguignon" <pjb@informatimago.com> - 2019-02-26 19:24 +0100
                Re: C is not a low level language "Pascal J. Bourguignon" <pjb@informatimago.com> - 2019-02-26 19:44 +0100
                Re: C is not a low level language nobody@example.org (Scott) - 2019-02-26 06:33 +0000
                Re: C is not a low level language nospam <nospam@nospam.invalid> - 2019-02-25 12:17 -0500
        Re: C is not a low level language Gene Wirchenko <genew@telus.net> - 2019-02-24 20:03 -0800
      Re: C is not a low level language pyotr filipivich <phamp@mindspring.com> - 2019-02-24 14:56 -0800
  Re: C is not a low level language Jasen Betts <jasen@xnet.co.nz> - 2019-02-24 20:43 +0000
    Re: C is not a low level language "Mr. Man-wai Chang" <toylet.toylet@gmail.com> - 2019-02-25 14:14 +0800
      Re: C is not a low level language "J. P. Gilliver (John)" <G6JPG-255@255soft.uk> - 2019-02-25 10:45 +0000
        Re: C is not a low level language "Mr. Man-wai Chang" <toylet.toylet@gmail.com> - 2019-02-25 19:04 +0800

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