>>>>> Markus Neteler <[EMAIL PROTECTED]> writes:
[...]
>> the extra char is due to the newline:
>> $ echo "" | wc -c 1 $ echo -n "" | wc -c 0
> ah, right. Question: is "-n" portable? I darkly remember some issue.
It's mandated by POSIX at least [1]. Besides, it's already used
widely in the GRASS scripts:
grass $ grep -rF '[ -n ' scripts/
... numerous...
grass $
One may also use [ x"$varn" != x ] instead, but I'd be against
such a practice (unless for a good reason.)
[...]
[1] http://www.opengroup.org/onlinepubs/009695399/utilities/test.html
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