Re: FW: Full path with ksh emulation

Re: FW: Full path with ksh emulation

[Peter Stephenson]

"Tony Hasler" wrote:
> The bad news is that it didn't work.  It tries to find the argument in
> $PATH, but when "." isn't there it reverts to the builtin.  When "." is in
> the path you get an absolute path, but one with a "." in it.  Only when the
> absolute path of "." is in $PATH and is the first place with an executable
> copy of the script does it seem to work.

Ah.  You're right.

>   if [[ $(builtin whence $1) == .* ]]; then

That looks good enough.  You can optimise out the subprocess by changing
this to

   if [[ $1 == .* || $(builtin whence $1) == .* ]]; then

the point being that in your case, where . isn't part of the path, you
are actually relying on the . being part of $1, so you never need the
code in the $(...).

You could probably change the patterns to (.|..)/* (as we're in
zsh-specific land) for a little extra safety but it doesn't make much
difference unless you have files starting with ".".

-- 
Peter Stephenson <pws@csr.com>                  Software Engineer
CSR PLC, Churchill House, Cambridge Business Park, Cowley Road
Cambridge, CB4 0WZ, UK                          Tel: +44 (0)1223 692070


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Annoying misfeature: ZSH completely hides output without newlines!

[Einar Huginson]

I have tried this with ZSH 4.2.5 and 4.2.6, linked against ncurses 5.4 
(specifically the Gentoo ebuild 5.4-r6). Note that PS1='$ ' and I have marked 
the cursor position with _

1. Example: Just echo text without a newline

	$ echo -n foo
	$ _

2. Example: cat a file that has no newline after the last (third!) line

	$ cat bar
	blah1
	blah2
	$ _

Note that the cat command itself works, the data is not lost, just not being  
displayed in ZSH

	$ cat bar | wc -w
	3
	$ _

Compare with the output by bash

	$ echo -n foo
	foo$ _

	$ cat bar
	blah1
	blah2
	blah3$ _

IMHO, this counts as a serious problem, since certain file contents are no 
longer visible, and files appear to be empty even if they aren't. I initially 
thought that my more involved prompt was at fault, but that doesn't seem to 
be the case (PS1='$ '). Or do I need to set a ZSH config option that prevents 
it from clearing the line before outputting the prompt?

Confused,
  Andreas Koch

Re: Annoying misfeature: ZSH completely hides output without newlines!

[Vincent Lefevre]

On 2006-01-06 15:15:27 +0100, Einar Huginson wrote:
> I have tried this with ZSH 4.2.5 and 4.2.6, linked against ncurses
> 5.4 (specifically the Gentoo ebuild 5.4-r6). Note that PS1='$ ' and
> I have marked the cursor position with _
> 
> 1. Example: Just echo text without a newline
> 
> 	$ echo -n foo
> 	$ _

This is a FAQ (man zshoptions).

> [...] Or do I need to set a ZSH config option that prevents it from
> clearing the line before outputting the prompt?

Yes.

-- 
Vincent Lefèvre <vincent@vinc17.org> - Web: <http://www.vinc17.org/>
100% accessible validated (X)HTML - Blog: <http://www.vinc17.org/blog/>
Work: CR INRIA - computer arithmetic / SPACES project at LORIA

Re: Annoying misfeature: ZSH completely hides output without newlines!

[Frank Terbeck]

Einar Huginson <huginson@web.de> wrote:
> I have tried this with ZSH 4.2.5 and 4.2.6, linked against ncurses 5.4 
> (specifically the Gentoo ebuild 5.4-r6). Note that PS1='$ ' and I have marked 
> the cursor position with _
> 
> 1. Example: Just echo text without a newline
> 
> 	$ echo -n foo
> 	$ _

setopt nopromptcr

Regards, Frank

Re: Annoying misfeature: ZSH completely hides output without newlines!

[Einar Huginson]

My apologies for not looking at the FAQ, I seriously did not consider the 
possibility that such ZSH behavior might be intentional.

Thanks for the pointers!

Andreas

On Friday 06 January 2006 15:26, Frank Terbeck wrote:
> Einar Huginson <huginson@web.de> wrote:
> > I have tried this with ZSH 4.2.5 and 4.2.6, linked against ncurses 5.4
> > (specifically the Gentoo ebuild 5.4-r6). Note that PS1='$ ' and I have
> > marked the cursor position with _
> >
> > 1. Example: Just echo text without a newline
> >
> > 	$ echo -n foo
> > 	$ _
>
> setopt nopromptcr
>
> Regards, Frank

Re: Annoying misfeature: ZSH completely hides output without newlines!

[Jean Chalard]

> IMHO, this counts as a serious problem, since certain file contents are no

Essentially a matter of taste :)


> Or do I need to set a ZSH config option that prevents
> it from clearing the line before outputting the prompt?

Yes. You can use
setopt no_prompt_cr
...to prevent zsh from printing a carriage return before its prompt,
like most other shells do.

If you use a recent enough zsh (4.3.0), the option PROMPT_SP is
available and is supposed to do about what everyone expects in about
every case (and has been made the default).


Note that this entry is listed in the FAQ as the most often asked
question about ZSH :p

--
J
"Toi, je te trouve pas la même tête que sur la page précédente" -- Wakamiya