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Re: perror()4 says SUCCESS

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Vincenzo Mercuri <vincenzo.mercuri@yahoo.it> writes:
> Keith Thompson ha scritto:
>> Vincenzo Mercuri<vincenzo.mercuri@yahoo.it>  writes:
>>> arnuld ha scritto:
>> [...]
>>>>         perror("*ERROR in ELSE");
>>> [...]
>>>
>>> Use printf("Error: %s\n", strerror(err)); instead or the Posix
>>> compliant and thread safe "strerror_r()".
>>
>> What's the advantage of that over perror()?
>>
>
> The point I was making was that while "perror()" prints the string
> representation of the *current* error described by "errno", with
> "strerror()" I can print out an error message that refers to a
> previously stored value of errno, such as "err" in this case.

Got it, thanks.  (I'd still prefer to print the message to stderr rather
than stdout; that's easy enough to do.)

-- 
Keith Thompson (The_Other_Keith) kst-u@mib.org  <http://www.ghoti.net/~kst>
"We must do something.  This is something.  Therefore, we must do this."
    -- Antony Jay and Jonathan Lynn, "Yes Minister"

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perror()4 says SUCCESS arnuld <sunrise@invalid.address> - 2011-11-22 10:39 +0000
  Re: perror()4 says SUCCESS jt@toerring.de (Jens Thoms Toerring) - 2011-11-22 11:44 +0000
  Re: perror()4 says SUCCESS Nick Keighley <nick_keighley_nospam@hotmail.com> - 2011-11-22 04:15 -0800
  Re: perror()4 says SUCCESS Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-11-22 07:51 -0500
  Re: perror()4 says SUCCESS Vincenzo Mercuri <vincenzo.mercuri@yahoo.it> - 2011-11-22 16:51 +0100
    Re: perror()4 says SUCCESS Keith Thompson <kst-u@mib.org> - 2011-11-22 13:30 -0800
      Re: perror()4 says SUCCESS Harald van Dijk <truedfx@gmail.com> - 2011-11-22 13:35 -0800
        Re: perror()4 says SUCCESS Vincenzo Mercuri <vincenzo.mercuri@yahoo.it> - 2011-11-22 22:51 +0100
      Re: perror()4 says SUCCESS James Kuyper <jameskuyper@verizon.net> - 2011-11-22 16:43 -0500
        Re: perror()4 says SUCCESS Ben Pfaff <blp@cs.stanford.edu> - 2011-11-22 15:36 -0800
          Re: perror()4 says SUCCESS James Kuyper <jameskuyper@verizon.net> - 2011-11-22 18:52 -0500
      Re: perror()4 says SUCCESS Vincenzo Mercuri <vincenzo.mercuri@yahoo.it> - 2011-11-22 22:50 +0100
        Re: perror()4 says SUCCESS Keith Thompson <kst-u@mib.org> - 2011-11-22 13:57 -0800
          Re: perror()4 says SUCCESS Vincenzo Mercuri <vincenzo.mercuri@yahoo.it> - 2011-11-22 23:05 +0100
    Re: perror()4 says SUCCESS Vincenzo Mercuri <vincenzo.mercuri@yahoo.it> - 2011-11-22 23:26 +0100
  Re: perror()4 says SUCCESS Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-11-22 20:40 -0500

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