is this a feature of zsh-3.1.6?

is this a feature of zsh-3.1.6?

[User ALEX]

Hi.

	The following does not produce output to screen on FreeBSD-3.4:

#include <stdio.h>

int main (void)
{
   printf ("Hello World\n");

   return 0;
}

c74763-a% ./hello
c74763-a% ./hello | strings
Hello World


	When '\n' is added to printf:

#include <stdio.h>

int main (void)
{
   printf ("Hello World\n");

   return 0;
}
c74763-a% ./hello
Hello World


However, when running under /bin/sh, all works.

Please suggest something :-)

Re: is this a feature of zsh-3.1.6?

[Geoff Wing]

User ALEX <alex@c74763-a.aurora1.co.home.com> typed:
:Hi.
:	The following does not produce output to screen on FreeBSD-3.4:
:#include <stdio.h>
:int main (void)
:{
:   printf ("Hello World\n");
                        ^^ shouldn't be here in this example
:   return 0;
:}
:
:c74763-a% ./hello
:c74763-a% ./hello | strings
:Hello World

% setopt nopromptcr	# (or unsetopt promptcr)
% ./hello
Hello World% ./hello
Hello World% sh
$ ./hello
Hello World$ ./hello
Hello World$

Regards,
-- 
Geoff Wing : <gcw@pobox.com>     Work URL: http://www.primenet.com.au/
Rxvt Stuff : <gcw@rxvt.org>      Ego URL : http://pobox.com/~gcw/
Zsh Stuff  : <gcw@zsh.org>       Phone   : (Australia) 0413 431 874

Re: is this a feature of zsh-3.1.6?

[User ALEX]

On 27 Dec 1999, Geoff Wing wrote:

: User ALEX <alex@c74763-a.aurora1.co.home.com> typed:
: :Hi.
: :	The following does not produce output to screen on FreeBSD-3.4:
: :#include <stdio.h>
: :int main (void)
: :{
: :   printf ("Hello World\n");
:                         ^^ shouldn't be here in this example
: :   return 0;
: :}
: :
: :c74763-a% ./hello
: :c74763-a% ./hello | strings
: :Hello World
: 
: % setopt nopromptcr	# (or unsetopt promptcr)

Thanks for the answer. Do you know why this option is enabled by default?!

Re: is this a feature of zsh-3.1.6?

[Geoff Wing]

User ALEX wrote about Re: is this a feature of zsh-3.1.6?:
:On 27 Dec 1999, Geoff Wing wrote:
:: % setopt nopromptcr	# (or unsetopt promptcr)
:Thanks for the answer. Do you know why this option is enabled by default?!

A couple of reasons are:
1) It's always been enabled by default (in the first widespread release
   version 2.0 it was called no_prompt_clobber and changed to no_prompt_cr
   in 2.2) so it's still enabled for backward compatibility.
2) It means that when line editing in command mode, the shell can reliably
   move the cursor (and text) around the line.  Without knowing where the
   cursor is in absolute (horizontal) terms the shell can't know if it has
   crossed a line boundary;  how the cursor behaves on crossing line
   boundaries has widely different behaviours depending upon the terminal.
   In short, if you use this then you're pretty much stuck with using
   short single line command lines (and no right prompt) when any text is
   spewed up prior to the prompt.

Regards,
-- 
Geoff Wing : <gcw@pobox.com>     Work URL: http://www.primenet.com.au/
Rxvt Stuff : <gcw@rxvt.org>      Ego URL : http://pobox.com/~gcw/
Zsh Stuff  : <gcw@zsh.org>       Phone   : (Australia) 0413 431 874

Re: is this a feature of zsh-3.1.6?

[David Kågedal]

Geoff Wing <gcw@pobox.com> writes:

> User ALEX wrote about Re: is this a feature of zsh-3.1.6?:
> :On 27 Dec 1999, Geoff Wing wrote:
> :: % setopt nopromptcr	# (or unsetopt promptcr)
> :Thanks for the answer. Do you know why this option is enabled by default?!
> 
> A couple of reasons are:
> 1) It's always been enabled by default (in the first widespread release
>    version 2.0 it was called no_prompt_clobber and changed to no_prompt_cr
>    in 2.2) so it's still enabled for backward compatibility.
> 2) It means that when line editing in command mode, the shell can reliably
>    move the cursor (and text) around the line.  Without knowing where the
>    cursor is in absolute (horizontal) terms the shell can't know if it has
>    crossed a line boundary;  how the cursor behaves on crossing line
>    boundaries has widely different behaviours depending upon the terminal.
>    In short, if you use this then you're pretty much stuck with using
>    short single line command lines (and no right prompt) when any text is
>    spewed up prior to the prompt.

I use no_prompt_cr, and I have a right prompt and stuff.  Of course
the command line gets a little messes up when programs don't finish
their output with a newline, but that can easily be cleared up with
ctrl-L.  I prefer to clear the mess up myselft rather than having zsh
hide output.

-- 
David Kågedal

Re: is this a feature of zsh-3.1.6?

[Nemeth Ervin]

>>>>> David Kågedal writes:

[...]

> I use no_prompt_cr, and I have a right prompt and stuff.  Of course
> the command line gets a little messes up when programs don't finish
> their output with a newline, but that can easily be cleared up with
> ctrl-L.  I prefer to clear the mess up myselft rather than having zsh
> hide output.

I have the same config, but I don't enjoy cleaning up the mess.

Let's take a look, what is the behaviour in an xterm window:
-------------------------------------------------------------------------------
airwin@kempelen:~ % echo -n Hello World\!                                 % 257
Hello World!airwin@kempelen:~ %                                                % 258
-------------------------------------------------------------------------------




Now I turn "Auto Wraparound" off in xterm:
-------------------------------------------------------------------------------
airwin@kempelen:~ % echo -n Hello World\!                                 % 257
Hello World!airwin@kempelen:~ %                                                7
-------------------------------------------------------------------------------
                    ^ the cursor is here




Now with "Auto Wraparound" and "Reverse Wraparound"
-------------------------------------------------------------------------------
airwin@kempelen:~ % echo -n Hello World\!                                 % 257
Hello World!airwin@kempelen:~ %                                                % 257
-------------------------------------------------------------------------------
                         ^ the cursor is here

Is there a way to correct this problem?  (Assuming a perfect terminfo/termcap
database)  Irrespectively of the terminal.

-- 
  ____                 ____________________________________________________
 /____| NEMETH, ERVIN |____________________________________________________|
//	< airwin @ inf.bme.hu >		http://www.inf.bme.hu/~airwin
||
||	"Nonsense.  All you have to do is say 'Engage'"
||					-- Patrick Stewart about warp theory

Re: is this a feature of zsh-3.1.6?

[Nemeth Ervin]

>>>>> David Kågedal writes:

[...]

> I use no_prompt_cr, and I have a right prompt and stuff.  Of course
> the command line gets a little messes up when programs don't finish
> their output with a newline, but that can easily be cleared up with
> ctrl-L.  I prefer to clear the mess up myselft rather than having zsh
> hide output.

I have the same config, but I don't enjoy cleaning up the mess.

Let's take a look, what is the behaviour in an xterm window:
-------------------------------------------------------------------------------
airwin@kempelen:~ % echo -n Hello World\!                                 % 257
Hello World!airwin@kempelen:~ %                                                % 258
-------------------------------------------------------------------------------




Now I turn "Auto Wraparound" off in xterm:
-------------------------------------------------------------------------------
airwin@kempelen:~ % echo -n Hello World\!                                 % 257
Hello World!airwin@kempelen:~ %                                                7
-------------------------------------------------------------------------------
                    ^ the cursor is here




Now with "Auto Wraparound" and "Reverse Wraparound"
-------------------------------------------------------------------------------
airwin@kempelen:~ % echo -n Hello World\!                                 % 257
Hello World!airwin@kempelen:~ %                                                % 257
-------------------------------------------------------------------------------
                         ^ the cursor is here

Is there a way to correct this problem?  (Assuming a perfect terminfo/termcap
database)  Irrespectively of the terminal.

-- 
  ____                 ____________________________________________________
 /____| NEMETH, ERVIN |____________________________________________________|
//	< airwin @ inf.bme.hu >		http://www.inf.bme.hu/~airwin
||
||	"Nonsense.  All you have to do is say 'Engage'"
||					-- Patrick Stewart about warp theory