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Re: [libvirt] [RFC Patch 0/3]virsh: Enable env support for virsh logging



On 05/20/2011 03:19 PM, Daniel P. Berrange wrote:
On Thu, May 19, 2011 at 12:19:11PM -0600, Eric Blake wrote:
On 05/09/2011 01:07 AM, Supriya Kannery wrote:

a. VIRSH_DEBUG=<log_level>
    log_level can be a value between 0 - 4, where
    0 ->  "ERROR"
    1 ->  "WARNING"
    2 ->  "NOTICE"
    3 ->  "INFO"
    4 ->  "DEBUG"

This is exactly the opposite to LIBVIRT_DEBUG=<log level>  which
has

  *    1: DEBUG
  *    2: INFO
  *    3: WARNING
  *    4: ERROR

IMHO, these need to be kept the same.

Through out virsh.c, the vshDebug is called with the assumption that DEBUG=4 or 5. Also, any higher log level record than user specified log level, doesn't get displayed as per vshDebug() code. So there was no
match between the enum definition and the code written.
vshDebug(vshControl *ctl, int level, const char *format, ...)
{
    ...
    vshOutputLogFile(ctl, 5, format, ap);
    va_end(ap);

    if (level > ctl->debug)
        return;

    va_start(ap, format);
    ...
}


When user choose "DEBUG", the expectation is that it is the superset of all log records. Usually, higher the log level value, more records are
expected. I can try changing libvirt as well to align to this norm, if
there are no major compatibility issues. Please comment.


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