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Re: standard error codes

Message-ID <8vvlkd-4es.ln1@wilbur.25thandClement.com> (permalink)
From <william@wilbur.25thandClement.com>
Subject Re: standard error codes
Newsgroups comp.lang.c
References (9 earlier) <o58gg3$d6i$1@dont-email.me> <lnshoonk3c.fsf@kst-u.example.com> <o58miv$4ud$1@dont-email.me> <ln7f60ng7q.fsf@kst-u.example.com> <o58rf2$o47$1@dont-email.me>
Date 2017-01-12 20:00 -0800

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Richard Heathfield <rjh@cpax.org.uk> wrote:
> On 12/01/17 21:03, Keith Thompson wrote:
> <snip>
>>
>> OK.  I usually want to see how two files (often two versions of the same
>> file) differ, and I usually expect them to differ.  If all I care about
>> is whether they differ or not, "cmp" is likely to be faster (perhaps not
>> significantly so).
> 
> I didn't know about cmp. Thanks.

You can download the POSIX standard for free from

  https://www2.opengroup.org/ogsys/catalog/c165

The free version is an off-line, frames-based HTML document. If you select
the Shell & Utilities volume, then the Utilities section, you'll get a very
helpful list of all standard shell utilities in the bottom left navigtion
frame. A few minutes browsing the list is the equivalent of years of
haphazard introductions on the command-line.

The POSIX C interface documentation is similarly useful, and apropos
comp.lang.c often contains information and analysis about compliance with
the C standard. Occassionally bugs or ambiguities in the C standard come out
when discussing proposals and errata. See

  http://austingroupbugs.net/view_all_bug_page.php

I've admonished countless engineers at my company to keep a copy of both the
ISO C standard and the POSIX standard on their computer desktop. I don't
think a single one has ever listened to me. *sigh* It's especially
frustrating because both standards--their content, presentation, and
style--are exceptionally easy to read and understand, yet retain a
tremendously high signal-to-noise ratio.

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Thread

standard  error codes Thiago Adams <thiago.adams@gmail.com> - 2017-01-08 06:34 -0800
  Re: standard  error codes Malcolm McLean <malcolm.mclean5@btinternet.com> - 2017-01-08 11:05 -0800
    Re: standard  error codes Thiago Adams <thiago.adams@gmail.com> - 2017-01-09 03:33 -0800
      Re: standard  error codes Malcolm McLean <malcolm.mclean5@btinternet.com> - 2017-01-09 04:55 -0800
        Re: standard  error codes Keith Thompson <kst-u@mib.org> - 2017-01-09 09:06 -0800
          Re: standard  error codes Thiago Adams <thiago.adams@gmail.com> - 2017-01-09 09:52 -0800
            Re: standard error codes BartC <bc@freeuk.com> - 2017-01-09 21:50 +0000
              Re: standard error codes BartC <bc@freeuk.com> - 2017-01-09 22:36 +0000
                Re: standard error codes supercat@casperkitty.com - 2017-01-09 14:51 -0800
                Re: standard error codes BartC <bc@freeuk.com> - 2017-01-09 23:39 +0000
                Re: standard error codes supercat@casperkitty.com - 2017-01-09 15:51 -0800
                Re: standard error codes Malcolm McLean <malcolm.mclean5@btinternet.com> - 2017-01-09 16:08 -0800
                Re: standard error codes supercat@casperkitty.com - 2017-01-09 18:51 -0800
                Re: standard error codes Malcolm McLean <malcolm.mclean5@btinternet.com> - 2017-01-10 02:02 -0800
                Re: standard error codes supercat@casperkitty.com - 2017-01-10 07:34 -0800
                Re: standard error codes BartC <bc@freeuk.com> - 2017-01-10 01:39 +0000
                Re: standard error codes Keith Thompson <kst-u@mib.org> - 2017-01-10 09:07 -0800
                Re: standard error codes supercat@casperkitty.com - 2017-01-10 09:59 -0800
                Re: standard error codes Keith Thompson <kst-u@mib.org> - 2017-01-10 12:02 -0800
                Re: standard error codes Malcolm McLean <malcolm.mclean5@btinternet.com> - 2017-01-10 12:53 -0800
                Re: standard error codes Keith Thompson <kst-u@mib.org> - 2017-01-10 13:03 -0800
                Re: standard error codes Malcolm McLean <malcolm.mclean5@btinternet.com> - 2017-01-10 15:41 -0800
                Re: standard error codes Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-01-11 02:56 +0000
                Re: standard error codes supercat@casperkitty.com - 2017-01-11 07:42 -0800
                Re: standard error codes supercat@casperkitty.com - 2017-01-10 12:59 -0800
                Re: standard error codes BartC <bc@freeuk.com> - 2017-01-10 18:14 +0000
                Re: standard error codes Keith Thompson <kst-u@mib.org> - 2017-01-10 12:12 -0800
                Re: standard error codes BartC <bc@freeuk.com> - 2017-01-10 20:35 +0000
                Re: standard error codes Keith Thompson <kst-u@mib.org> - 2017-01-10 13:00 -0800
                Re: standard error codes supercat@casperkitty.com - 2017-01-11 08:16 -0800
                Re: standard error codes Richard Heathfield <rjh@cpax.org.uk> - 2017-01-11 18:25 +0000
                Re: standard error codes BartC <bc@freeuk.com> - 2017-01-11 19:09 +0000
                Re: standard error codes Keith Thompson <kst-u@mib.org> - 2017-01-11 12:03 -0800
                Re: standard error codes Richard Heathfield <rjh@cpax.org.uk> - 2017-01-11 20:10 +0000
                Re: standard error codes Keith Thompson <kst-u@mib.org> - 2017-01-11 12:19 -0800
                Re: standard error codes BartC <bc@freeuk.com> - 2017-01-11 20:31 +0000
                Re: standard error codes Lew Pitcher <lew.pitcher@digitalfreehold.ca> - 2017-01-11 15:32 -0500
                Re: standard error codes Richard Heathfield <rjh@cpax.org.uk> - 2017-01-11 20:48 +0000
                Re: standard error codes Lew Pitcher <lew.pitcher@digitalfreehold.ca> - 2017-01-11 15:58 -0500
                Re: standard error codes Keith Thompson <kst-u@mib.org> - 2017-01-11 13:01 -0800
                Re: standard error codes Richard Heathfield <rjh@cpax.org.uk> - 2017-01-11 21:05 +0000
                Re: standard error codes BartC <bc@freeuk.com> - 2017-01-11 21:08 +0000
                Re: standard error codes Gareth Owen <gwowen@gmail.com> - 2017-01-11 21:38 +0000
                Re: standard error codes BartC <bc@freeuk.com> - 2017-01-11 21:58 +0000
                Re: standard error codes David Brown <david.brown@hesbynett.no> - 2017-01-12 12:11 +0100
                Re: standard error codes Keith Thompson <kst-u@mib.org> - 2017-01-12 09:28 -0800
                Re: standard error codes Richard Heathfield <rjh@cpax.org.uk> - 2017-01-12 18:06 +0000
                Re: standard error codes Keith Thompson <kst-u@mib.org> - 2017-01-12 11:39 -0800
                Re: standard error codes Richard Heathfield <rjh@cpax.org.uk> - 2017-01-12 19:50 +0000
                Re: standard error codes Keith Thompson <kst-u@mib.org> - 2017-01-12 13:03 -0800
                Re: standard error codes Richard Heathfield <rjh@cpax.org.uk> - 2017-01-12 21:13 +0000
                Re: standard error codes <william@wilbur.25thandClement.com> - 2017-01-12 20:00 -0800
                Re: standard error codes Malcolm McLean <malcolm.mclean5@btinternet.com> - 2017-01-13 01:56 -0800
                Re: standard error codes Richard Heathfield <rjh@cpax.org.uk> - 2017-01-13 12:54 +0000
                Re: standard error codes Keith Thompson <kst-u@mib.org> - 2017-01-13 09:35 -0800
                Re: standard error codes Richard Heathfield <rjh@cpax.org.uk> - 2017-01-13 17:38 +0000
                Re: standard error codes James Kuyper <jameskuyper@verizon.net> - 2017-01-13 13:06 -0500
                Re: standard error codes raltbos@xs4all.nl (Richard Bos) - 2017-01-18 12:00 +0000
                Re: standard error codes Richard Heathfield <rjh@cpax.org.uk> - 2017-01-18 12:13 +0000
                Re: standard error codes Malcolm McLean <malcolm.mclean5@btinternet.com> - 2017-01-12 16:43 -0800
                Re: standard error codes <william@wilbur.25thandClement.com> - 2017-01-12 19:34 -0800
                Re: standard error codes Keith Thompson <kst-u@mib.org> - 2017-01-13 09:27 -0800
                Re: standard error codes raltbos@xs4all.nl (Richard Bos) - 2017-01-12 19:33 +0000
                Re: standard error codes Keith Thompson <kst-u@mib.org> - 2017-01-12 12:10 -0800
                Re: standard error codes supercat@casperkitty.com - 2017-01-11 11:50 -0800
                Re: standard error codes Richard Heathfield <rjh@cpax.org.uk> - 2017-01-11 20:38 +0000
                Re: standard error codes jadill33@gmail.com - 2017-01-11 12:26 -0800
                Re: standard error codes Richard Heathfield <rjh@cpax.org.uk> - 2017-01-11 20:44 +0000
      Re: standard  error codes Keith Thompson <kst-u@mib.org> - 2017-01-09 09:03 -0800
  Re: standard  error codes supercat@casperkitty.com - 2017-01-08 11:40 -0800

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