[virt-tools-list] [PATCH 0/3] virt-top stream mode

[Richard W.M. Jones]

On Wed, Jan 26, 2011 at 11:39:19AM +0000, Richard W.M. Jones wrote:
>   virt-top -b --script --csv /dev/stdout

Or here's another idea ...

$ cat spaces.py
#!/usr/bin/python
import sys
import csv
out = csv.writer (sys.stdout, delimiter=' ')
out.writerows (csv.reader (sys.stdin))

$ virt-top -b --script --csv /dev/stdout | ./spaces.py 
Hostname Time Arch "Physical CPUs" Count Running Blocked Paused Shutdown Shutoff Crashed Active Inactive %CPU "Total hardware memory (KB)" "Total memory (KB)" "Total guest memory (KB)" "Total CPU time (ns)" "Domain ID" "Domain name" "CPU (ns)" %CPU "Block RDRQ" "Block WRRQ" "Net RXBY" "Net TXBY"
spin.home.annexia.org 11:47:58 x86_64 4 0 0 0 0 0 0 0 0 0 0.0 3832252 0 0 0
spin.home.annexia.org 11:48:01 x86_64 4 0 0 0 0 0 0 0 0 0 0.0 3832252 0 0 0

Notes:

(1) The output is not line-buffered, so you won't see any output
until the program ends.  This seems to be a Python problem.

(2) There are obviously problems with parsing the title row using
naive string splitting (which is why doing it as a CSV is better).

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
libguestfs lets you edit virtual machines.  Supports shell scripting,
bindings from many languages.  http://libguestfs.org