Hello again Eric,
I am beginning to doubt the portability of regular expressions
altogether. A fully grouped pattern seems to be what AIX needs:
echo -e "abab\nbaab\nabba" | egrep '^((a?[ab])|(ba)){2}$'
echo -e "abab\nbaab\nabba" | egrep '^((ba)|(a?[ab])){2}$'
If this does not work, AIX stays hopeless! Could it be that
AIX produces a match for
echo "abaaba" | egrep '^((a?[ab])|ba){2}$'
which would be honestly terrible.
Back to the original matter. Following the suggestion
of Charles Steinkuehler, the functionality in validator.sh
is restored when I put the asymmetry to ugly use:
$THIS(-$THIS){3} ---> ($THIS-){3}$THIS
(broken) (functional)
where THIS is similar to
(r?a|is)
only that I use ordinary regexes in validator.sh, not the
extended version, although this service is internal to validator.sh.
As some of you have noticed, I did file a notice with the uClibc
mailing list, so hopefully the matter will be better as the next
beta phase of Bering-uC unrolls.
Best regards
Mats E A
fre 2008-02-29 klockan 18:20 +0100 skrev Erich Titl:
> Hi Mats
>
> Mats Erik Andersson schrieb:
> > Dear Eric,
> >
> > ....
> > echo -e "abab\nbaab\nabba" | egrep '^((a?[ab])|ba){2}$'
> > echo -e "abab\nbaab\nabba" | egrep '^(ba|(a?[ab])){2}$'
>
> # echo -e "abab\nbaab\nabba" | egrep '^((a?[ab])|ba){2}$'
> baab
> abba
> # echo -e "abab\nbaab\nabba" | egrep '^(ba|(a?[ab])){2}$'
> baab
> abba
>
I expected also "abab" in both cases, like GNU provides.
> Regards
>
> Erich
>
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