[linux-lvm] lvcreate and lvremove --quiet option is not quiet
jlar310 at gmail.com
Mon Feb 14 15:46:05 UTC 2011
Background: I am using lvm snapshots in a backup script. My general
scripting philosophy is that automation scripts that do not have
errors should not generate output that will cause cron to send an
I am using Ubuntu 10.04 with lvm2.02.54-1ubuntu4.
Even with the --quiet option I get "Logical volume <name> created" on
stdout with lvcreate and "Logical volume <name> successfully removed"
So... I grabbed the source code and started nosing around. In
lv_manip.c, I find that these messages are produced with a call to the
function log_print. log_print is a macro (in log.h) for
LOG_LINE(_LOG_WARN, args). So it looks like the logging system sees
these messages as warnings and is printing them even though verbosity
is turned down as far as possible. In addition to --quiet on the
command line, I have verbose = 0 in lvm.conf which according to the
man page "should produce no output".
>From my point of view, lv_manip.c should be calling the log_info macro
for these messages and not log_print, thus giving the user control
over the output as advertised by the documentation. Disclaimer: I did
not dig into the source code far enough to be assured that log_info
will generated the proper results, but it certainly appears on the
surface to be the right option.
I also downloaded the latest source tarball (188.8.131.52) and the
situation appears to be the same.
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