Maarten, There's no question that this concept has existed since very early versions of DOS (1981), but I, personally, have never heard it referred to as such outside the 'C'/*nix context before. In fact, the notion of std-whichever existed under CP/M, too, as we had 'C' compilers there for several years before the PC became dominant in the industry. There was, under CP/M, even a feeble attempt (in '79 or so) at emulating a UNIX shell for CP/M.
People, then, didn't discuss this in the same terms when programming in ASM, FORTRAN, BASIC, COBOL, ALGOL, PL/1, PL/M, PASCAL, LISP, or any of the other languages popular at the time. Since I came up through the microcomputer industry rather than minicomputers, where one was more likely to encounter 'C' and its friends, the syntax seems "unix-ish" to me. regards, Richard Erlacher ----- Original Message ----- From: "Maarten Brock" <[EMAIL PROTECTED]> To: <sdcc-user@lists.sourceforge.net> Sent: Sunday, August 31, 2008 7:37 AM Subject: Re: [Sdcc-user] Quickstart document > Richard(s), > > DOS and Windows are no different in this regard. stdin, > stdout and stderr have been a part of it since at least > DOS version 2.1 (I've never used an earlier one). And > all this piping works in them too. > > Maarten > >> stdout (stdin and stderr) are an integral part of stdio.h, so it's as >> much a >> C-ism as a Unix-ism. >> >> I don't know how the Windows environment would cope with this, but under >> Unix >> file-descriptor 0 is stdin, descriptor 1 is stdout, and 2 is stderr, and >> these are automatically opened before the execution of main() if one >> includes >> stdio.h. I should stress that I'm talking about PC-type processors now, >> rather than the SDCC device set - the underlying assumptions about the >> operating system don't exist for small devices, so stdio.h and its >> accompanying libraries would probably not be meaningful for a PIC or a >> Z80 or >> whatever. >> >> In Unix, suppose one were running a program called 'blinkey' - a nice >> example >> people seem to use... >> >> shell$ blinkey | more >> >> This would pipe the stdout from 'blinkey' through to stdin of 'more'. >> Anything >> blinkey wrote to stderr would appear on the screen, but if this was too >> much >> to cope with one could do this... >> >> shell$ blinkey 2> errors.txt >> >> The above means to redirect file descriptor 2 (stderr) to the errors.txt >> file. >> >> Similarly, the standard input can be pulled from a file, like this... >> >> shell$ blinkey < blinkey_input.txt >> >> And then one can get smart and combine these to do all kinds of crazy >> things! >> >> I *believe* Windows/DOS can do the standard input and output bits in >> similar >> fashion, but I have never had occasion to try it - I'm a dyed-in-the-wool >> Unix (Linux) nerd, you might gather. I don't know how Windows copes with >> descriptor 2 (stderr) if at all. >> >> On Saturday 30 August 2008 17:41:38 Richard Erlacher wrote: >> > Well, that's exactly the mechanism I mentioned ... I'm not surprised it >> > has >> > a name ... but -stdout ... ??? That sounds like *nix. >> > >> > regards, >> > >> > Richard Erlacher >> > >> > ----- Original Message ----- >> <snip> >> >> -- >> Richard. >> PGP Key-id: 0x5AB3D350 >> >> A reactionary is a man whose political opinions always manage to keep >> up with yesterday. > > > ------------------------------------------------------------------------- > This SF.Net email is sponsored by the Moblin Your Move Developer's > challenge > Build the coolest Linux based applications with Moblin SDK & win great > prizes > Grand prize is a trip for two to an Open Source event anywhere in the > world > http://moblin-contest.org/redirect.php?banner_id=100&url=/ > _______________________________________________ > Sdcc-user mailing list > Sdcc-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/sdcc-user ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Sdcc-user mailing list Sdcc-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/sdcc-user
