[Sugar-devel] Quoting in shell scripts (was: Re: [sugar-devel] Recent fiddlings with Print Support)

[Martin Langhoff]

On Thu, May 14, 2009 at 8:14 AM, Andrés Ambrois <andresambrois at gmail.com> wrote:
> if [ -z `grep "%!PS-Adobe-3.0" < "$fn2"` ]; then

Even better, you can use the exit code of grep, thus

   if grep -q 'pattern' $file; then

elegant, clearer and faster :-)

Some grep implementations don't support -q, so a more portable way
(but uglier) of saying the same is:

  if grep 'pattern' $file >/dev/null ; then

(Actually, some take -s for 'silent', but that's patchy as well. Only
/dev/null works everywhere...)

cheers,



m
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