Possible Unicode Problems in Busybox - Collect and Discussion

[Harald Becker]

> 3) applet expr, function length STRING
> This also may hit the *index*, *substr* and *match* functions. Do we
> look at positions of character or at byte positions. What does the specs
> say on this?

Looks like they removed *length*, *index*, *substr* and *match* from the 
specification of this applet???

... and spec says:

expr "$var" : '.*'

shall return the number of characters.

$ xxx=äöü
$ expr "$xxx" : '.*'
6

... outch! (Both BB and upstream)