Hello,
I run an application which output is non-stop. Is it possible to use awk or something else to see only selected columns?
thx
Hello,
I run an application which output is non-stop. Is it possible to use awk or something else to see only selected columns?
thx
You can script awk, so yes. You would write a script to process stdin, this could be done in any language, not just awk.
C programming resources:
GNU C Function and Macro Index -- glibc reference manual
The C Book -- nice online learner guide
Current ISO draft standard
CCAN -- new CPAN like open source library repository
3 (different) GNU debugger tutorials: #1 -- #2 -- #3
cpwiki -- our wiki on sourceforge
well i usebut it doesn't work. Why?Code:application | cut -f1 | awk {'print $1'}
If u let me know what your trying to monitor with the awk script i can write u a one line perl script ??
Newk
well the ouput have 11 columns. I want only the 1,2,6,8,11.
ok, as far as i can see from a few tests
what u need is
application | awk '{ print $1, $2, $6, $8, $11}'
that should work
Newk
I tryed already, it doesn't work :/ maybe (?) because the applications output is non stop?
Do u need the formatted output as it comes out?? or wud after its run work too?
Newky
I need the formatted output as it comes out.. :/
I'm forgetting my shell scripting, but what about something like
Code:application& > temp_file while true; do tail temp_file | awk whatever; done
can i do it without creating a file? is it possible something like that application | awk ... ?
Pipe isn't going to pass anything along until the first process terminates, I'm pretty sure.
dawm :/ i don't want to create a file because the stream is non-stop and if the application runs for a long time it'll create a huge file :/. There isn't something like the line-line buffer you suggested me before?
You probably then want to redirect the output of your application to your script. Maybe something like
Code:while true; do read var1 var2 var3 var4 var5 var6 var7 var8 var9 var10 var11; #There's probably a shortcut for this echo "$var1 $var6 $var8 $var11"; done
the problem is that i call the application using popen inside a c program. Can i use something like that?