Re: zpty woes

[Stephane Chazelas <Stephane_Chazelas@xxxxxxxx>]

On Thu, May 15, 2008 at 12:00:25PM -0400, Jaime Vargas wrote:
> Still doesn't work for me. Below is the modified script and the debug 
> output.
>
> #!/opt/csw/bin/zsh
>
> set -x
>
> zmodload zsh/zpty
>
> die() {print -r -- $1 >&2; exit 1;}
>
> zpty scppty scp hello.world jvargas@xxxxxxxxxxxxxxxxxxxxxxxxxxx:~/
> zpty -t scppty || die "fuck"
> zpty -r scppty line "*:" || die "no password asked"
> zpty -w scppty "3lp&tbw"
> while zpty -r scppty line;
>     do
>         result+="$line"$'\n'
>     done
> zpty -d scppty
> print $result
>
> I changed my credentials for security. Basically it now hangs waitng for 
> password and doesnt' do anything.  -- Jaime
>
> nerd% ./zpty-test.zsh
> +./zpty-test.zsh:5> zmodload zsh/zpty
> +./zpty-test.zsh:10> zpty scppty scp hello.world 'luser@host:~/'
> +./zpty-test.zsh:11> zpty -t scppty
> +./zpty-test.zsh:12> zpty -r scppty line '*:'

Had you printed $line, you'd have seen something like
"+myscript:", not "Passwd: ".


[...]
> +./zpty-test.zsh:14> zpty -r scppty line
[...]

As Peter said, if you don't provide with a pattern to look for,
zpty will look for NL characters.

That last zpty is probably still waiting because so far, it has
only received "Password: " and is waiting for a NL character
that will never come.

So, in your code above, you should wait for something more
specific than just ":":

zpty -r scppty line "assword: " || die "no password asked"

for instance.

-- 
Stéphane