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Groups > comp.os.linux.misc > #69012
| From | rbowman <bowman@montana.com> |
|---|---|
| Newsgroups | comp.os.linux.misc |
| Subject | Re: VMS |
| Date | 2025-06-22 19:23 +0000 |
| Message-ID | <mbr3glF5ijfU3@mid.individual.net> (permalink) |
| References | (11 earlier) <1033tv1$3aqu$3@dont-email.me> <1034pj8$a74s$1@dont-email.me> <mbmm2nFdsgcU2@mid.individual.net> <slrn105cajs.4vj.spamtrap42@one.localnet> <slrn105g20l.3q8n7.candycanearter07@candydeb.host.invalid> |
On Sun, 22 Jun 2025 13:50:03 -0000 (UTC), candycanearter07 wrote:
> Robert Riches <spamtrap42@jacob21819.net> wrote at 03:43 this Saturday
> (GMT):
>> On 2025-06-21, rbowman <bowman@montana.com> wrote:
>>> On Fri, 20 Jun 2025 23:07:20 -0000 (UTC), Rich wrote:
>>>
>>>> Very likely, but the idea was to protect the typical programmer from
>>>> their own common mistakes (of not carefully checking error return
>>>> codes or buffer lengths, etc.). I.e. the typical 9-5 contract
>>>> programmer, not the Dennis Ritchie's of the world.
>>>
>>> I'm paranoid enough that I check the return of malloc and try to log
>>> the problem even though I'm probably screwed at that point. It has
>>> pointed out errors for calloc if you've manged to come up with a
>>> negative size.
>>>
>>> I have worked with programmers that assumed nothing bad would ever
>>> happen.
>>> Sadly, some had years of experience.
>>
>> Some years ago, I heard of a bug related to use of malloc. The code
>> had _intended_ to dynamically allocate storage for a string and the
>> terminating null byte. It was _intended_ to do this:
>>
>> dest = malloc(strlen(src)+1);
>>
>> Instead, a paren was misplaced:
>>
>> dest = malloc(strlen(src))+1;
>>
>> IIUC, the next line copied the src string into the newly- allocated
>> destination.
>
> Aren't you supposed to multiply by sizeof as well?
No, malloc is N bytes. calloc is N elements of sizeof(foo). Also
malloc() doesn't initialize the memory but calloc() zeroes it out. That
can be another pitfall if you're using something like memcpy() with
strings and don't copy in the terminating NUL. If you try something like
printf("%s", my_string) if you're really lucky there will have been a NUL
in the garbage; if not the string will be terminated somewhere, maybe.
calloc() is to be preferred imnsho. In many cases you're going to memset()
the malloc'd memory to 0 so you might as well get it over with.
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VMS c186282 <c186282@nnada.net> - 2025-06-14 01:15 -0400
Re: VMS Bobbie Sellers <bliss-sf4ever@dslextreme.com> - 2025-06-14 10:05 -0700
Re: VMS Andreas Eder <a_eder_muc@web.de> - 2025-06-14 20:30 +0200
Re: VMS Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-06-14 23:27 +0000
Re: VMS rbowman <bowman@montana.com> - 2025-06-15 00:57 +0000
Re: VMS c186282 <c186282@nnada.net> - 2025-06-14 23:32 -0400
Re: VMS The Natural Philosopher <tnp@invalid.invalid> - 2025-06-15 08:26 +0100
Re: VMS c186282 <c186282@nnada.net> - 2025-06-15 21:12 -0400
Re: VMS Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2025-06-16 18:15 +0000
Re: VMS c186282 <c186282@nnada.net> - 2025-06-17 23:20 -0400
Re: VMS rbowman <bowman@montana.com> - 2025-06-18 04:14 +0000
Re: VMS c186282 <c186282@nnada.net> - 2025-06-18 02:34 -0400
Re: VMS rbowman <bowman@montana.com> - 2025-06-15 18:49 +0000
Re: VMS c186282 <c186282@nnada.net> - 2025-06-15 22:45 -0400
Re: VMS rbowman <bowman@montana.com> - 2025-06-16 04:35 +0000
Re: VMS c186282 <c186282@nnada.net> - 2025-06-16 01:35 -0400
Re: VMS c186282 <c186282@nnada.net> - 2025-06-14 23:03 -0400
Re: VMS candycanearter07 <candycanearter07@candycanearter07.nomail.afraid> - 2025-06-18 05:30 +0000
Re: VMS c186282 <c186282@nnada.net> - 2025-06-18 02:09 -0400
Re: VMS candycanearter07 <candycanearter07@candycanearter07.nomail.afraid> - 2025-06-18 19:00 +0000
Re: VMS Rich <rich@example.invalid> - 2025-06-18 20:23 +0000
Re: VMS Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2025-06-18 20:30 +0000
Re: VMS rbowman <bowman@montana.com> - 2025-06-18 23:09 +0000
Re: VMS Richard Kettlewell <invalid@invalid.invalid> - 2025-06-19 08:40 +0100
Re: VMS c186282 <c186282@nnada.net> - 2025-06-20 00:43 -0400
Re: VMS Richard Kettlewell <invalid@invalid.invalid> - 2025-06-20 09:00 +0100
Re: VMS The Natural Philosopher <tnp@invalid.invalid> - 2025-06-20 10:19 +0100
Re: VMS Richard Kettlewell <invalid@invalid.invalid> - 2025-06-20 15:15 +0100
Re: VMS Rich <rich@example.invalid> - 2025-06-20 13:36 +0000
Re: VMS The Natural Philosopher <tnp@invalid.invalid> - 2025-06-20 16:15 +0100
Re: VMS Rich <rich@example.invalid> - 2025-06-20 23:07 +0000
Re: VMS The Natural Philosopher <tnp@invalid.invalid> - 2025-06-21 01:07 +0100
Re: VMS rbowman <bowman@montana.com> - 2025-06-21 03:09 +0000
Re: VMS Robert Riches <spamtrap42@jacob21819.net> - 2025-06-21 03:43 +0000
Re: VMS c186282 <c186282@nnada.net> - 2025-06-21 01:36 -0400
Re: VMS rbowman <bowman@montana.com> - 2025-06-21 05:53 +0000
Re: VMS candycanearter07 <candycanearter07@candycanearter07.nomail.afraid> - 2025-06-22 13:50 +0000
Re: VMS Richard Kettlewell <invalid@invalid.invalid> - 2025-06-22 15:27 +0100
Re: VMS The Natural Philosopher <tnp@invalid.invalid> - 2025-06-22 15:56 +0100
Re: VMS c186282 <c186282@nnada.net> - 2025-06-23 00:18 -0400
Re: VMS rbowman <bowman@montana.com> - 2025-06-22 19:23 +0000
Re: VMS candycanearter07 <candycanearter07@candycanearter07.nomail.afraid> - 2025-06-23 18:10 +0000
Re: VMS rbowman <bowman@montana.com> - 2025-06-23 19:27 +0000
Re: VMS Robert Riches <spamtrap42@jacob21819.net> - 2025-06-24 03:34 +0000
Re: VMS Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2025-06-24 04:52 +0000
Re: VMS rbowman <bowman@montana.com> - 2025-06-24 05:14 +0000
Re: VMS c186282 <c186282@nnada.net> - 2025-06-24 01:36 -0400
Re: VMS rbowman <bowman@montana.com> - 2025-06-24 06:49 +0000
Re: VMS The Natural Philosopher <tnp@invalid.invalid> - 2025-06-24 10:31 +0100
Re: VMS c186282 <c186282@nnada.net> - 2025-06-25 01:36 -0400
Re: VMS The Natural Philosopher <tnp@invalid.invalid> - 2025-06-25 07:31 +0100
Re: VMS c186282 <c186282@nnada.net> - 2025-06-25 03:08 -0400
Re: VMS Richard Kettlewell <invalid@invalid.invalid> - 2025-06-24 08:56 +0100
Re: VMS Robert Riches <spamtrap42@jacob21819.net> - 2025-06-25 03:01 +0000
Re: VMS c186282 <c186282@nnada.net> - 2025-06-25 01:59 -0400
Re: VMS rbowman <bowman@montana.com> - 2025-06-25 06:52 +0000
Re: VMS John Ames <commodorejohn@gmail.com> - 2025-06-25 09:32 -0700
Re: VMS John Ames <commodorejohn@gmail.com> - 2025-06-25 09:44 -0700
Re: VMS c186282 <c186282@nnada.net> - 2025-06-25 19:01 -0400
Re: VMS candycanearter07 <candycanearter07@candycanearter07.nomail.afraid> - 2025-06-27 06:00 +0000
Re: VMS Richard Kettlewell <invalid@invalid.invalid> - 2025-06-27 08:37 +0100
Re: VMS The Natural Philosopher <tnp@invalid.invalid> - 2025-06-27 08:45 +0100
Re: VMS Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-06-27 08:14 +0000
Re: VMS c186282 <c186282@nnada.net> - 2025-06-27 13:27 -0400
Re: VMS The Natural Philosopher <tnp@invalid.invalid> - 2025-06-27 19:13 +0100
Re: VMS Chris Ahlstrom <OFeem1987@teleworm.us> - 2025-06-28 09:16 -0400
Re: VMS c186282 <c186282@nnada.net> - 2025-06-27 13:24 -0400
Re: VMS rbowman <bowman@montana.com> - 2025-06-27 17:40 +0000
Re: VMS Lew Pitcher <lew.pitcher@digitalfreehold.ca> - 2025-06-27 18:20 +0000
Re: VMS Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-06-27 23:03 +0000
Re: VMS c186282 <c186282@nnada.net> - 2025-06-28 01:13 -0400
Re: VMS rbowman <bowman@montana.com> - 2025-06-28 06:10 +0000
Re: VMS c186282 <c186282@nnada.net> - 2025-06-27 18:16 -0400
Re: VMS Richard Kettlewell <invalid@invalid.invalid> - 2025-06-28 08:52 +0100
Re: VMS c186282 <c186282@nnada.net> - 2025-06-28 23:16 -0400
Re: VMS Richard Kettlewell <invalid@invalid.invalid> - 2025-06-29 08:18 +0100
Re: VMS c186282 <c186282@nnada.net> - 2025-06-29 19:09 -0400
Re: VMS The Natural Philosopher <tnp@invalid.invalid> - 2025-06-30 08:36 +0100
Re: VMS Richard Kettlewell <invalid@invalid.invalid> - 2025-06-30 08:51 +0100
Re: VMS The Natural Philosopher <tnp@invalid.invalid> - 2025-06-30 08:59 +0100
Re: VMS Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-06-30 08:33 +0000
Re: VMS John Ames <commodorejohn@gmail.com> - 2025-06-30 09:08 -0700
Re: VMS jayjwa <jayjwa@atr2.ath.cx.invalid> - 2025-06-30 22:18 -0400
Re: VMS Richard Kettlewell <invalid@invalid.invalid> - 2025-06-30 09:00 +0100
Re: VMS The Natural Philosopher <tnp@invalid.invalid> - 2025-06-30 09:24 +0100
Re: VMS Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-06-30 08:34 +0000
Re: VMS c186282 <c186282@nnada.net> - 2025-06-30 23:30 -0400
Re: VMS c186282 <c186282@nnada.net> - 2025-06-30 23:26 -0400
Re: VMS The Natural Philosopher <tnp@invalid.invalid> - 2025-07-01 10:49 +0100
Re: VMS Lew Pitcher <lew.pitcher@digitalfreehold.ca> - 2025-07-01 12:44 +0000
Re: VMS Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2025-07-02 01:13 +0000
Re: VMS c186282 <c186282@nnada.net> - 2025-07-01 21:46 -0400
Re: VMS Lew Pitcher <lew.pitcher@digitalfreehold.ca> - 2025-07-02 16:03 +0000
Re: VMS Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-06-30 07:54 +0000
Re: VMS rbowman <bowman@montana.com> - 2025-06-30 18:10 +0000
Re: VMS c186282 <c186282@nnada.net> - 2025-06-30 23:12 -0400
Re: VMS rbowman <bowman@montana.com> - 2025-07-01 04:02 +0000
Re: VMS c186282 <c186282@nnada.net> - 2025-07-01 12:42 -0400
Re: VMS Richard Kettlewell <invalid@invalid.invalid> - 2025-06-30 08:56 +0100
Re: VMS Rich <rich@example.invalid> - 2025-06-27 19:40 +0000
Re: VMS Richard Kettlewell <invalid@invalid.invalid> - 2025-06-20 21:19 +0100
Re: VMS Rich <rich@example.invalid> - 2025-06-20 23:17 +0000
Re: VMS Richard Kettlewell <invalid@invalid.invalid> - 2025-06-21 08:42 +0100
Re: VMS Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-06-21 07:02 +0000
Re: VMS c186282 <c186282@nnada.net> - 2025-06-21 03:23 -0400
Re: VMS c186282 <c186282@nnada.net> - 2025-06-21 01:27 -0400
Re: VMS c186282 <c186282@nnada.net> - 2025-06-21 01:10 -0400
Re: VMS rbowman <bowman@montana.com> - 2025-06-21 05:59 +0000
Re: VMS c186282 <c186282@nnada.net> - 2025-06-21 02:10 -0400
Re: VMS The Natural Philosopher <tnp@invalid.invalid> - 2025-06-20 10:12 +0100
Re: VMS Rich <rich@example.invalid> - 2025-06-20 13:39 +0000
Re: VMS c186282 <c186282@nnada.net> - 2025-06-21 01:23 -0400
Re: VMS Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-06-21 06:57 +0000
Re: VMS c186282 <c186282@nnada.net> - 2025-06-21 03:07 -0400
Re: VMS Richard Kettlewell <invalid@invalid.invalid> - 2025-06-21 08:45 +0100
Re: VMS c186282 <c186282@nnada.net> - 2025-06-22 02:32 -0400
Re: VMS Rich <rich@example.invalid> - 2025-06-20 13:30 +0000
Re: VMS The Natural Philosopher <tnp@invalid.invalid> - 2025-06-20 16:14 +0100
Re: VMS Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-06-20 08:57 +0000
Re: VMS c186282 <c186282@nnada.net> - 2025-06-21 01:17 -0400
Re: VMS c186282 <c186282@nnada.net> - 2025-06-14 22:57 -0400
Re: VMS Rich <rich@example.invalid> - 2025-06-15 14:24 +0000
Re: VMS c186282 <c186282@nnada.net> - 2025-06-15 22:26 -0400
Re: VMS rbowman <bowman@montana.com> - 2025-06-16 04:30 +0000
Re: VMS c186282 <c186282@nnada.net> - 2025-06-16 01:31 -0400
Re: VMS Rich <rich@example.invalid> - 2025-06-18 17:40 +0000
Re: VMS rbowman <bowman@montana.com> - 2025-06-18 23:06 +0000
Re: VMS c186282 <c186282@nnada.net> - 2025-06-18 19:43 -0400
Re: VMS Rich <rich@example.invalid> - 2025-06-19 01:08 +0000
Re: VMS c186282 <c186282@nnada.net> - 2025-06-19 00:46 -0400
Re: VMS rbowman <bowman@montana.com> - 2025-06-19 06:36 +0000
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