[0/4] input: Allow two consecutive calls to pungetc

[Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>]

On Wed, Oct 29, 2014 at 10:52:30PM +0100, Jilles Tjoelker wrote:
>
> This implementation of pgetc_eatbnl() does not allow pushing back a
> backslash, since that would call pungetc() twice without an intervening
> pgetc(). However, some places do attempt to push back a backslash. As a
> result, a script file containing many repeated  ${w#\#}  will not be
> parsed correctly. There is a similar bug with repeated  $\#  but this is
> not specified by POSIX.

I finally got around to fixing this.  I've decided to do things
a little differently by making it possible to do two pungetc's in
a row.

When I get some spare time I would like to make the parser reentrant
so we can do PS4 properly and fix some other corner cases.

Thanks,
-- 
Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Home Page: http://gondor.apana.org.au/~herbert/
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