[9fans] awk bug or matt bug?

[9fans] awk bug or matt bug?

[matt]

I've got some records where I'm trying to extract the b and I ran into this
problem :

9% echo 'a[b]c' | awk ' BEGIN { FS="\[" } { print $2 } '
b]c

9% echo 'a[b]c' | awk ' BEGIN { FS="a\[" } { print $2 } '
awk: malformed '[]'
 input record :1
 source line 1

I've got a solution but that's not the point

9% echo 'a[b]c' | sed -e 's/\[/!/g' -e 's/]/!/g' | awk ' BEGIN { FS="!" }
{ print $2 } '
b

just thought I'd mention it

m

Re: [9fans] awk bug or matt bug?

[Aharon Robbins]

It's a matt bug.  You need one more \, like so:

	$ echo 'a[b]c' | nawk 'BEGIN { FS = "a\\[" } ; { print $2 }'
	b]c

The single \ gets eaten during scanning, and awk sees a regex of `a['
which is invalid, thus the second \.

HTH,

Arnold

In article <015401c28f0a$327fdac0$6501a8c0@KIKE> you write:
>I've got some records where I'm trying to extract the b and I ran into this
>problem :
>
>9% echo 'a[b]c' | awk ' BEGIN { FS="\[" } { print $2 } '
>b]c
>
>9% echo 'a[b]c' | awk ' BEGIN { FS="a\[" } { print $2 } '
>awk: malformed '[]'
> input record :1
> source line 1
>
>I've got a solution but that's not the point
>
>9% echo 'a[b]c' | sed -e 's/\[/!/g' -e 's/]/!/g' | awk ' BEGIN { FS="!" }
>{ print $2 } '
>b
>
>just thought I'd mention it
>
>m
>


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