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Groups > comp.lang.c > #146028

Re: error_t proposal

From Bruce S <bruces42@hotmail.com>
Newsgroups comp.lang.c
Subject Re: error_t proposal
Date 2019-09-05 08:18 -0600
Organization A noiseless patient Spider
Message-ID <qkr5fu$1k1$1@dont-email.me> (permalink)
References <5d03868d-22f7-4c7f-9f9b-1e70d8d8e6f2@googlegroups.com> <ln36hbwvop.fsf@kst-u.example.com> <5d70c108$0$14374$426a74cc@news.free.fr> <b2c74983-313a-4bc2-84c7-b294103ac0a7@googlegroups.com>

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On 9/5/19 5:04 AM, Thiago Adams wrote:
> On Thursday, September 5, 2019 at 5:02:25 AM UTC-3, Mateusz Viste wrote:
>> On Wed, 04 Sep 2019 15:20:06 -0700, Keith Thompson wrote:
>>> Thiago Adams  writes:
>>>> Some libraries uses 0 to say "no error" and others use 1 or true do say
>>>> "no error".
>>> [...]
>>>
>>> What libraries use 1 to denote "no error"?
>>>
>>> In my experience, error codes in C are almost always zero for success,
>>> non-zero for failure (with either the value or errno providing more
>>> information about the error).  (My experience does have a
>>> UNIX/POSIX/Linux bias.)
>>
>> Your experience missed inet_pton() then. :)
>> But yes - it is quite an exception.
> 
> Windows API has several functions returning BOOL where non zero
> is success. Zero is error and then GetLastError is used.
> 
> BOOL DeleteFileA(LPCSTR lpFileName);

IIRC from my VAX days, their library functions returned an odd value for
success, an even one for error.  So 1 would be *one of* the many, many
values denoting "no error".  Unfortunately, the libraries we built to
work in that environment followed the same approach.  I don't recall
ever having code that depended on exactly which "success" code was
returned, though there were plenty that depended on specific errors.

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Thread

error_t proposal Thiago Adams <thiago.adams@gmail.com> - 2019-09-04 14:14 -0700
  Re: error_t proposal Keith Thompson <kst-u@mib.org> - 2019-09-04 15:20 -0700
    Re: error_t proposal Mateusz Viste <mateusz@wont.tell> - 2019-09-05 08:02 +0000
      Re: error_t proposal Thiago Adams <thiago.adams@gmail.com> - 2019-09-05 04:04 -0700
        Re: error_t proposal Bruce S <bruces42@hotmail.com> - 2019-09-05 08:18 -0600
          Re: error_t proposal Keith Thompson <kst-u@mib.org> - 2019-09-05 14:31 -0700
            Re: error_t proposal James Kuyper <jameskuyper@alumni.caltech.edu> - 2019-09-05 17:49 -0400
              Re: error_t proposal Keith Thompson <kst-u@mib.org> - 2019-09-05 15:14 -0700
            Re: error_t proposal Bruce S <bruces42@hotmail.com> - 2019-09-06 14:03 -0600
  Re: error_t proposal Clifford Heath <no.spam@please.net> - 2019-09-05 09:30 +1000
    Re: error_t proposal Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2019-09-05 02:38 -0700
    Re: error_t proposal Thiago Adams <thiago.adams@gmail.com> - 2019-09-05 04:57 -0700
      Re: error_t proposal Thiago Adams <thiago.adams@gmail.com> - 2019-09-05 05:16 -0700
        Re: error_t proposal Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2019-09-05 05:35 -0700
          Re: error_t proposal Thiago Adams <thiago.adams@gmail.com> - 2019-09-05 06:08 -0700
            Re: error_t proposal Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2019-09-05 06:16 -0700
              Re: error_t proposal Thiago Adams <thiago.adams@gmail.com> - 2019-09-05 06:37 -0700
                Re: error_t proposal Thiago Adams <thiago.adams@gmail.com> - 2019-09-05 07:04 -0700
                Re: error_t proposal Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-09-05 20:51 +0100
                Re: error_t proposal Thiago Adams <thiago.adams@gmail.com> - 2019-09-05 13:52 -0700
                Re: error_t proposal Keith Thompson <kst-u@mib.org> - 2019-09-05 14:56 -0700
              Re: error_t proposal William Ahern <william@25thandClement.com> - 2019-09-05 13:18 -0700
              Re: error_t proposal Clifford Heath <no.spam@please.net> - 2019-09-06 07:25 +1000
      Re: error_t proposal Clifford Heath <no.spam@please.net> - 2019-09-06 07:35 +1000
        Re: error_t proposal Thiago Adams <thiago.adams@gmail.com> - 2019-09-06 04:22 -0700
    Re: error_t proposal scott@slp53.sl.home (Scott Lurndal) - 2019-09-05 13:59 +0000
      Re: error_t proposal Clifford Heath <no.spam@please.net> - 2019-09-06 07:10 +1000
  Re: error_t proposal Jorgen Grahn <grahn+nntp@snipabacken.se> - 2019-09-05 10:01 +0000
    Re: error_t proposal Thiago Adams <thiago.adams@gmail.com> - 2019-09-05 04:36 -0700
      Re: error_t proposal Keith Thompson <kst-u@mib.org> - 2019-09-05 14:43 -0700
        Re: error_t proposal Thiago Adams <thiago.adams@gmail.com> - 2019-09-06 05:01 -0700
          Re: error_t proposal Keith Thompson <kst-u@mib.org> - 2019-09-06 11:18 -0700
            Re: error_t proposal scott@slp53.sl.home (Scott Lurndal) - 2019-09-06 19:34 +0000
            Re: error_t proposal Thiago Adams <thiago.adams@gmail.com> - 2019-09-06 12:37 -0700
              Re: error_t proposal Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-09-06 20:54 +0100
                Re: error_t proposal Keith Thompson <kst-u@mib.org> - 2019-09-06 13:20 -0700
                Re: error_t proposal Thiago Adams <thiago.adams@gmail.com> - 2019-09-06 13:43 -0700
                Re: error_t proposal Keith Thompson <kst-u@mib.org> - 2019-09-06 14:25 -0700
                Re: error_t proposal Thiago Adams <thiago.adams@gmail.com> - 2019-09-06 15:14 -0700
                Re: error_t proposal Keith Thompson <kst-u@mib.org> - 2019-09-06 15:49 -0700
                Re: error_t proposal Thiago Adams <thiago.adams@gmail.com> - 2019-09-06 18:44 -0700
                Re: error_t proposal Clifford Heath <no.spam@please.net> - 2019-09-07 12:35 +1000
                Re: error_t proposal Ike Naar <ike@sdf.lonestar.org> - 2019-09-08 20:15 +0000
                Re: error_t proposal Clifford Heath <no.spam@please.net> - 2019-09-09 09:30 +1000
                Re: error_t proposal Ike Naar <ike@iceland.freeshell.org> - 2019-09-09 07:35 +0000
                Re: error_t proposal Clifford Heath <no.spam@please.net> - 2019-09-09 19:44 +1000
                Re: error_t proposal scott@slp53.sl.home (Scott Lurndal) - 2019-09-09 13:58 +0000
                Re: error_t proposal Jorgen Grahn <grahn+nntp@snipabacken.se> - 2019-09-10 14:24 +0000
                Re: error_t proposal Clifford Heath <no.spam@please.net> - 2019-09-11 09:22 +1000
                Re: error_t proposal Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2019-09-10 16:48 -0700
                Re: error_t proposal Clifford Heath <no.spam@please.net> - 2019-09-11 10:45 +1000
                Re: error_t proposal Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-09-06 21:47 +0100
  Re: error_t proposal jadill33@gmail.com - 2019-09-05 07:04 -0700
    Re: error_t proposal Thiago Adams <thiago.adams@gmail.com> - 2019-09-05 07:36 -0700
      Re: error_t proposal jadill33@gmail.com - 2019-09-05 08:43 -0700

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