Re: help with pattern matching needed

[Christoph Anton Mitterer]

Hey again.


I just noted that bash and klibc sh behave differently from dash and
busybox sh...


$ cat circumflex-test 
case "$1" in
(['^.a'])
        echo match
        ;;
(*)
        echo else
esac




$ cat exclamation-test 
case "$1" in
(['!.a'])
        echo match
        ;;
(*)
        echo else
esac




$ cat run-circumflex 
echo dash:
dash circumflex-test ^
dash circumflex-test .
dash circumflex-test a

echo busybox-sh:
busybox sh circumflex-test ^
busybox sh circumflex-test .
busybox sh circumflex-test a

echo bash:
bash circumflex-test ^
bash circumflex-test .
bash circumflex-test a

echo klibc-sh:
/usr/lib/klibc/bin/sh circumflex-test ^
/usr/lib/klibc/bin/sh circumflex-test .
/usr/lib/klibc/bin/sh circumflex-test a




$ cat run-exlamation 
echo dash:
dash exclamation-test '!'
dash exclamation-test .
dash exclamation-test a

echo busybox-sh:
busybox sh exclamation-test '!'
busybox sh exclamation-test .
busybox sh exclamation-test a

echo bash:
bash exclamation-test '!'
bash exclamation-test .
bash exclamation-test a

echo klibc-sh:
/usr/lib/klibc/bin/sh exclamation-test '!'
/usr/lib/klibc/bin/sh exclamation-test .
/usr/lib/klibc/bin/sh exclamation-test a




When run:
$ sh run-circumflex | paste - - - - | column -t
dash:        match  else   else
busybox-sh:  match  else   else
bash:        match  match  match
klibc-sh:    match  match  match
$
               ^      .      a


$ sh run-exlamation | paste - - - - | column -t
dash:        match  match  match
busybox-sh:  match  match  match
bash:        match  match  match
klibc-sh:    match  match  match
$
               !      .      a


Does anyone have any explanation for this (other than it being a bug in
dash/busybox-sh[0])?


Thanks,
Chris.


[0] And yes I know this list is about bash, but since here are so
knowledgable experts I thought I could dare to ask. O:-)