On Mon, 17 May 2010, Denys Vlasenko wrote:
> On Monday 17 May 2010 22:10, Douglas Mencken wrote:
> > Patches welcome? Here's mine.
> > License: Public domain.
>
> > - while read -r; do
> > - test x"$REPLY" = x"INSERT" && REPLY="$s"
> > - printf "%s\n" "$REPLY"
> > + while read -r reply; do
> > + test x"$reply" = x"INSERT" && reply="$s"
> > + printf "%s\n" "$reply"
> > done <"$src" >>"$dst.$$.tmp"
> >
> > if test -f "$dst" && cmp -s "$dst.$$.tmp" "$dst"; then
> >
> > (also attached)
> > It's easy, isn't it? ;)
>
> Easy and
arguably?
> wrong. It eats leading and trailing whitespace.
I cannot find anything in the opengroup page you earlier referred to:
http://www.opengroup.org/onlinepubs/009695399/utilities/read.html
saying explicitely "whitespace must me preserved". On the contrary,
"The line shall be split into fields as in the shell (see Field
Splitting); the first field shall be assigned to the first variable var,
the second field to the second variable var, and so on."
Cheers,
--
Cristian
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