Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > comp.lang.c > #141804
| From | Keith Thompson <kst-u@mib.org> |
|---|---|
| Newsgroups | comp.lang.c |
| Subject | Re: Safer and more convenient strcpy() |
| Date | 2019-03-07 18:32 -0800 |
| Organization | None to speak of |
| Message-ID | <lnmum6ksdi.fsf@kst-u.example.com> (permalink) |
| References | (5 earlier) <DpbgE.6596$sw5.1011@fx21.iad> <8f69ad8b-a898-4423-8781-0df209e92782@googlegroups.com> <slrnq8374v.4jo.grahn+nntp@frailea.sa.invalid> <8dn8lf-9mt2.ln1@wilbur.25thandClement.com> <v5q8lf-saq.ln1@wilbur.25thandClement.com> |
William Ahern <william@25thandClement.com> writes:
> William Ahern <william@25thandclement.com> wrote:
[...]
>> And then there's the matter that snprintf takes an int parameter for the
>> buffer size as well as returning an int, raising the spectre of unexpected
>> and undefined conversions and overflows. Indeed, the two issues
>> combined--integer conversions and managing error conditions--makes the above
>> example snprintf usage poorly written code, IMO.
>
> Correction: it only returns an int; it takes size_t. However, there's the
> issue of the treatment of a buffer size value greater than INT_MAX.
I think that's a matter of historical precedence, and likely not that
much of a problem in practice.
The *printf() functions have been defined to return int since before
size_t even existed. size_t would make more sense, since the value is a
size in bytes.
But on a modern system with 16-bit int you aren't likely to need
character arrays longer than 32767 bytes (in fact it's not likely to be
a hosted implementation), and 2**31 bytes should be enough for anybody.
Yes, the irony in that last claim is deliberate, but you won't often see
buffers that big treated as strings.
--
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 */
Back to comp.lang.c | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
Safer and more convenient strcpy() Howard Chu <highlandsun@gmail.com> - 2019-03-06 03:45 -0800
Re: Safer and more convenient strcpy() Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2019-03-06 03:58 -0800
Re: Safer and more convenient strcpy() Howard Chu <highlandsun@gmail.com> - 2019-03-06 04:31 -0800
Re: Safer and more convenient strcpy() "I Set My Girlfriend's Pantyhose on Fire" <cdalten@gmail.com> - 2019-03-06 05:18 -0800
Re: Safer and more convenient strcpy() Howard Chu <highlandsun@gmail.com> - 2019-03-06 13:03 -0800
Re: Safer and more convenient strcpy() William Ahern <william@25thandClement.com> - 2019-03-06 16:51 -0800
Re: Safer and more convenient strcpy() Howard Chu <highlandsun@gmail.com> - 2019-03-07 07:40 -0800
Re: Safer and more convenient strcpy() scott@slp53.sl.home (Scott Lurndal) - 2019-03-07 16:12 +0000
Re: Safer and more convenient strcpy() Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2019-03-07 08:28 -0800
Re: Safer and more convenient strcpy() scott@slp53.sl.home (Scott Lurndal) - 2019-03-07 16:51 +0000
Re: Safer and more convenient strcpy() Howard Chu <highlandsun@gmail.com> - 2019-03-07 09:31 -0800
Re: Safer and more convenient strcpy() Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2019-03-07 11:17 -0800
Re: Safer and more convenient strcpy() Jorgen Grahn <grahn+nntp@snipabacken.se> - 2019-03-07 22:35 +0000
Re: Safer and more convenient strcpy() Howard Chu <highlandsun@gmail.com> - 2019-03-07 15:32 -0800
Re: Safer and more convenient strcpy() scott@slp53.sl.home (Scott Lurndal) - 2019-03-08 14:29 +0000
Re: Safer and more convenient strcpy() Howard Chu <highlandsun@gmail.com> - 2019-03-08 07:09 -0800
Re: Safer and more convenient strcpy() Jorgen Grahn <grahn+nntp@snipabacken.se> - 2019-03-08 15:39 +0000
Re: Safer and more convenient strcpy() Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2019-03-08 07:56 -0800
Re: Safer and more convenient strcpy() Jorgen Grahn <grahn+nntp@snipabacken.se> - 2019-03-09 08:12 +0000
Re: Safer and more convenient strcpy() William Ahern <william@25thandClement.com> - 2019-03-07 15:51 -0800
Re: Safer and more convenient strcpy() William Ahern <william@25thandClement.com> - 2019-03-07 16:38 -0800
Re: Safer and more convenient strcpy() Keith Thompson <kst-u@mib.org> - 2019-03-07 18:32 -0800
Re: Safer and more convenient strcpy() William Ahern <william@25thandClement.com> - 2019-03-07 20:00 -0800
Re: Safer and more convenient strcpy() Howard Chu <highlandsun@gmail.com> - 2019-03-08 04:15 -0800
Re: Safer and more convenient strcpy() "I Set My Girlfriend's Pantyhose on Fire" <cdalten@gmail.com> - 2019-03-07 12:15 -0800
Re: Safer and more convenient strcpy() Tim Rentsch <tr.17687@z991.linuxsc.com> - 2019-03-06 09:12 -0800
Re: Safer and more convenient strcpy() mark.bluemel@gmail.com - 2019-03-06 08:27 -0800
Re: Safer and more convenient strcpy() Tim Rentsch <tr.17687@z991.linuxsc.com> - 2019-03-06 09:22 -0800
Re: Safer and more convenient strcpy() Rosario19 <Ros@invalid.invalid> - 2019-03-07 09:10 +0100
Re: Safer and more convenient strcpy() Rosario19 <Ros@invalid.invalid> - 2019-03-07 09:12 +0100
Re: Safer and more convenient strcpy() mark.bluemel@gmail.com - 2019-03-07 00:55 -0800
Re: Safer and more convenient strcpy() William Ahern <william@25thandClement.com> - 2019-03-07 16:09 -0800
Re: Safer and more convenient strcpy() Howard Chu <highlandsun@gmail.com> - 2019-03-08 04:04 -0800
Re: Safer and more convenient strcpy() eric.sanchis@iut-rodez.fr - 2019-04-15 04:40 -0700
Re: Safer and more convenient strcpy() nobody@example.org (Scott) - 2019-04-16 03:33 +0000
Re: Safer and more convenient strcpy() eric.sanchis@iut-rodez.fr - 2019-04-16 05:35 -0700
Re: Safer and more convenient strcpy() nobody@example.org (Scott) - 2019-04-17 01:19 +0000
Re: Safer and more convenient strcpy() eric.sanchis@iut-rodez.fr - 2019-04-17 05:35 -0700
Re: Safer and more convenient strcpy() nobody@example.org (Scott) - 2019-04-17 16:59 +0000
Re: Safer and more convenient strcpy() eric.sanchis@iut-rodez.fr - 2019-04-17 23:40 -0700
Re: Safer and more convenient strcpy() Philipp Klaus Krause <pkk@spth.de> - 2019-03-20 11:10 +0100
Re: Safer and more convenient strcpy() Philipp Klaus Krause <pkk@spth.de> - 2019-03-20 11:13 +0100
csiph-web