using AWK

[Polytropon]

On Mon, 17 Dec 2012 04:22:21 -0800 (PST), Jack Mc Lauren wrote:
> Yes, I want the number to go into an awk variable.
> [...] 
> This is what i wrote:
> 
> 
> #! /bin/sh
> 
> filename=$0
> awk 'getline no < filename; print no'
> 
> But when I run this script
> 
> sh /awk_no.sh /var/no.txt
> 
> I have this error :
> 
> awk: syntax error at source line 1
>  context is
>         getline no < filename; >>>  print <<<  no
> awk: bailing out at source line 1
> 
> Thank you :)


The error is obvious: You need to transition $filename from
the sh level into the awk script, i. e. the file name string
(in your example, "/var/no.txt") must be visible inside the
awk script. You're using a variable called filename which
is uninitialized (empty). You can either define the file
name statically in the awk script, or use ${filename} in
the script (use double quotes to allow resolution).

Also note that $0 is the name by which the script has been
called. $1 is the 1st parameter.




-- 
Polytropon
Magdeburg, Germany
Happy FreeBSD user since 4.0
Andra moi ennepe, Mousa, ...