standard error messages in a std::string or in a const char *

From	Soviet_Mario <SovietMario@CCCP.MIR>
Newsgroups	comp.lang.c++
Subject	standard error messages in a std::string or in a const char *
Date	2019-09-11 00:35 +0200
Organization	A noiseless patient Spider
Message-ID	<ql98g2$8tf$1@dont-email.me> (permalink)

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I'm striving with the translation of standard error codes 
(returned by runtime functions), like "errno" codes in the 
corresponding TEXTUAL DESCRIPTIONS.

I've seen perror () functions knows how to translate errno, 
but it does not allow to return that description as a 
string. Instead it "prints" to stderr, which is useless if 
ones tries to bubble error messages in a chain of function 
calls (with the aim : me, callee, don't know how to handle, 
I bubble the message to you, the caller, and maybe you know 
or THE USER might know).

perror must lookup some internal table where errno's values 
are translated and the text returned (or copied to stderr).

How to get it in a string ?
thanks



-- 
1) Resistere, resistere, resistere.
2) Se tutti pagano le tasse, le tasse le pagano tutti
Soviet_Mario - (aka Gatto_Vizzato)

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standard error messages in a std::string or in a const char * Soviet_Mario <SovietMario@CCCP.MIR> - 2019-09-11 00:35 +0200
  Re: standard error messages in a std::string or in a const char * Soviet_Mario <SovietMario@CCCP.MIR> - 2019-09-11 00:37 +0200
    Re: standard error messages in a std::string or in a const char * Jorgen Grahn <grahn+nntp@snipabacken.se> - 2019-09-11 08:28 +0000
      Re: standard error messages in a std::string or in a const char * Juha Nieminen <nospam@thanks.invalid> - 2019-09-11 08:58 +0000
        Re: standard error messages in a std::string or in a const char * Bonita Montero <Bonita.Montero@gmail.com> - 2019-09-11 11:09 +0200
          Re: standard error messages in a std::string or in a const char * Bonita Montero <Bonita.Montero@gmail.com> - 2019-09-11 11:37 +0200
        Re: standard error messages in a std::string or in a const char * Keith Thompson <kst-u@mib.org> - 2019-09-11 02:37 -0700
          Re: standard error messages in a std::string or in a const char * Bonita Montero <Bonita.Montero@gmail.com> - 2019-09-11 11:47 +0200
            Re: standard error messages in a std::string or in a const char * Öö Tiib <ootiib@hot.ee> - 2019-09-11 04:43 -0700
              Re: standard error messages in a std::string or in a const char * James Kuyper <jameskuyper@alumni.caltech.edu> - 2019-09-11 08:27 -0400
                Re: standard error messages in a std::string or in a const char * Manfred <noname@add.invalid> - 2019-09-11 14:56 +0200
                Re: standard error messages in a std::string or in a const char * Daniel <danielaparker@gmail.com> - 2019-09-11 07:00 -0700
          Re: standard error messages in a std::string or in a const char * Thiago Adams <thiago.adams@gmail.com> - 2019-09-11 09:44 -0700
          Re: standard error messages in a std::string or in a const char * Jorgen Grahn <grahn+nntp@snipabacken.se> - 2019-09-12 10:21 +0000
            Re: standard error messages in a std::string or in a const char * Soviet_Mario <SovietMario@CCCP.MIR> - 2019-09-12 13:05 +0200
        Re: standard error messages in a std::string or in a const char * Soviet_Mario <SovietMario@CCCP.MIR> - 2019-09-11 17:43 +0200
          Re: standard error messages in a std::string or in a const char * Paavo Helde <myfirstname@osa.pri.ee> - 2019-09-11 19:23 +0300
            Re: standard error messages in a std::string or in a const char * Soviet_Mario <SovietMario@CCCP.MIR> - 2019-09-11 19:19 +0200
              Re: standard error messages in a std::string or in a const char * Paavo Helde <myfirstname@osa.pri.ee> - 2019-09-11 20:32 +0300
                Re: standard error messages in a std::string or in a const char * Soviet_Mario <SovietMario@CCCP.MIR> - 2019-09-12 13:08 +0200
                Re: standard error messages in a std::string or in a const char * Thiago Adams <thiago.adams@gmail.com> - 2019-09-12 04:29 -0700
                Re: standard error messages in a std::string or in a const char * Keith Thompson <kst-u@mib.org> - 2019-09-12 14:41 -0700
              Re: standard error messages in a std::string or in a const char * Thiago Adams <thiago.adams@gmail.com> - 2019-09-11 10:39 -0700
              Re: standard error messages in a std::string or in a const char * James Kuyper <jameskuyper@alumni.caltech.edu> - 2019-09-11 19:50 -0400
                Re: standard error messages in a std::string or in a const char * Keith Thompson <kst-u@mib.org> - 2019-09-11 17:11 -0700
                Re: standard error messages in a std::string or in a const char * James Kuyper <jameskuyper@alumni.caltech.edu> - 2019-09-11 20:23 -0400
                Re: standard error messages in a std::string or in a const char * David Brown <david.brown@hesbynett.no> - 2019-09-12 11:21 +0200
                Re: standard error messages in a std::string or in a const char * James Kuyper <jameskuyper@alumni.caltech.edu> - 2019-09-12 07:31 -0400
                Re: standard error messages in a std::string or in a const char * Manfred <noname@add.invalid> - 2019-09-12 15:44 +0200

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