An issue about gwak 3.1.1, is it a bug?

[高磊]

Hi,

Here is an issue of gawk, may be a bug :

 

SYS: Linux 2.4.31-2bs #2 SMP Wed Mar 22 11:39:55 CST 2006 i686 i686 i386
GNU/Linux

GWAK: GNU Awk 3.1.1

 

I have a file named a.log,(the delimiter is Tab)

 

$ cat a.log

1abc    2abc

3abc    4abc

5abc    6abc

 

And then I wrote a command as:

$ awk 'FS="\t" gsub(/a/,"A",$1){print $0,NF}' a.log

1Abc 2abc 2

3Abc    4Abc 1

5Abc    6Abc 1

 

Why this? The delimiter of first line is space, but other lines is Tab)

 

I know the “FS=” is invalible,

but such command’s result is right:

$ awk '{FS="\t"; gsub(/a/,"A",$1);print $0,NF}' a.log

1Abc 2abc 2

3Abc 4abc 2

5Abc 6abc 2

 

I guess there is something wrong between “FS=” and “gsub”.

 

I am glad to receive any reply, thanksJ

 

Yours,

 

Gaolei 

>From Baidu.com