Shell Programming and Scripting

Hi,

I would like:

FastEthernet0/0 is up, line protocol is up
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 output errors, 0 collisions, 0 interface resets
Serial1/0:0 is up, line protocol is up
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 output errors, 0 collisions, 0 interface resets

in a file to be output as:

FastEthernet0/0 is up, line protocol is up, 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 output errors, 0 collisions, 0 interface resets
Serial10:0 is up, line protocol is up, 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 output errors, 0 collisions, 0 interface resets


I've used the awk syntax: awk 'ORS=NR%3?",":"\n"' <INPUT-FILE> but my output is:

, 0 output errors, 0 collisions, 0 interface resetsred
, 0 output errors, 0 collisions, 0 interface resetsred, 0 abort


I read numerous posts regarding merging lines, but I haven't been able to understand why the awk syntax above doesn't work.


Any ideas?


Thanks,
Mario

Code:

nawk 'ORS=(FNR%3)?", ":RS' myFile

Hi, thanks but the system I am using does not have nawk installed.

The awk syntax I presented above worked fine on a Fedora server, but moving the script to CentOS, it no longer works.


I'd prefer to avoid system specific binaries and syntax so it is easily portable (perhaps this may be why I have run into this problem now...)


FYI, I get the same output...

awk 'ORS=(FNR%3)?", ":RS' test2
, 0 output errors, 0 collisions, 0 interface resetsred
, 0 output errors, 0 collisions, 0 interface resetsred, 0 abort


I am using the default bash shell. Could the shell I am using be a problem?

no, the shell should not matter.
Could you post the exact content of your sample data file test2 - using the code tags.

Hope I post this right..


cat <inout file> gives me:

0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

0 output errors, 0 collisions, 0 interface resets

0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

0 output errors, 0 collisions, 0 interface resets

Needed output:



Output I get running my and your syntax:

$awk 'ORS=NR%3?",":"\n"' test2



Entering the input file with vi seems to show that each original line is ended with an end of line correctly (one line doesn't follow onto the next.

Code:

nawk 'NF{cnt++}ORS=(cnt%3)?", ":RS'

Hmm.. I get exactly the same output as with the other commands.

Testing that I have the right syntax, I use: awk 'NF{cnt++}ORS=(cnt%1)?", ":RS' test2

This gives me the whole file input correctly (as if I would cat it).


Should it make a difference I am using awk and not nawk?