On Thu, 14 Oct 2010, dag wrote:
> On Thu, 14 Oct 2010, Maxime Ritter wrote:
>
>> dag wrote:
>>> Quite easy, the block that tests for a functional curses apparently fails
>>> on Ubuntu 10.10. What TERM was set in this case so I can reproduce the
>>> problem and see if another error message makes any sense in this case ?
>>
>> TERM=dumb
>>
>> It's very easy to reproduce : take a Xubuntu i386 10.10 CD, and install
>> it with an unplugged internet connection (or without the package
>> updates, as the fix for Bug #621927 has been released, but didn't catch
>> my mirror). Reboot, run the xfce terminal (default terminal in xubuntu),
>> apt-get install dstat, then run dstat....
>
> Apparently the wrong TERM is not the cause for this. Trying to reproduce
> this on my CentOS system I get:
>
> [...@moria dstat]$ TERM=dumb ./dstat -ta
> ----system---- ----total-cpu-usage---- -dsk/total- -net/total- ---paging--
> ---system--
> time |usr sys idl wai hiq siq| read writ| recv send| in out |
> int csw
> 14-10 09:57:45| 6 1 92 1 0 0| 29k 50k| 0 0 |4924B
> 5696B|2408 7228
> 14-10 09:57:46| 2 0 98 0 0 0| 0 0 | 262B 112B| 0 0 |
> 324 685
>
> So the wrong TERM is not the cause here. Could you remove the try/except
> statement around that block and send me the exception you get ?
Ok, I had some time to look at this and on CentOS 'dumb' is in fact a real
termcap entry that does not support colors. But if I instead use something
fake, I get this:
[...@moria dstat]$ TERM=dag dstat -ta
Color support is disabled, python-curses is not installed.
----system---- ----total-cpu-usage---- -dsk/total- -net/total- ---paging--
---system--
time |usr sys idl wai hiq siq| read writ| recv send| in out |
int csw
14-10 19:39:25| 2 0 98 0 0 0| 77k 70k| 0 0 | 0 0 | 318
637
14-10 19:39:26| 1 1 99 0 0 0| 0 0 | 0 0 | 0 0 | 547
1389
So I have now fixed this to display:
[...@moria dstat]$ TERM=dag ./dstat -ta
Color support is disabled as terminal (TERM=dag) does not support colors.
----system---- ----total-cpu-usage---- -dsk/total- -net/total- ---paging--
---system--
time |usr sys idl wai hiq siq| read writ| recv send| in out |
int csw
14-10 19:40:06| 2 0 98 0 0 0| 77k 70k| 0 0 | 0 0 | 318
638
14-10 19:40:07| 1 1 99 0 0 0| 0 16k| 0 0 | 0 0 | 515
1210
The fix was quite simple:
----
def gettermcolor(color=True):
"Return whether the system can use colors or not"
if color and sys.stdout.isatty():
try:
import curses
curses.setupterm()
if curses.tigetnum('colors') < 0:
return False
except ImportError:
print >>sys.stderr, 'Color support is disabled as python-curses is
not installed.'
return False
except:
print >>sys.stderr, 'Color support is disabled as terminal
(TERM=%s) does not support colors.' % os.getenv('TERM')
return False
return color
----
Thanks for reporting !
--
-- dag wieers, d...@wieers.com, http://dag.wieers.com/ --
[Any errors in spelling, tact or fact are transmission errors]
--
dstat lost color support in ubuntu 10.10
https://bugs.launchpad.net/bugs/660181
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