Re: logging to file in gtkmm

[Giuseppe Penone <giuspen gmail com>]

Hi Florian,
following your lead I reached /etc/rsyslog.d/50-default.conf

I added:
local0.*                        /var/log/mylog

at the beginning, then restarted the service but still no result.

I get an error from syslog:
rsyslogd-2039: Could not open output pipe '/dev/xconsole' [try http://www.rsyslog.com/e/2039 ]
but have no clue what's wrong.

I surfed on google a bit but cannot understand why no row is written to /var/log/mylog

I'm surprised that such a simple thing is that compliceted to setup.
Thanks anyway.

On Mon, Jun 11, 2012 at 3:33 PM, Florian Philipp <lists binarywings net> wrote:

Hi Guiseppe,

please keep replies on the list.

Regarding setting the destination file: This depends on which syslog
daemon you use. I'm not sure but I think Ubuntu uses syslog-ng. There
the syntax would be like this:

##### /etc/syslog-ng/syslog-ng.conf #####

# Source should already exist, check the name and update the rest
source src { unix-stream("/dev/log"); internal(); };

# Define the logging chain
destination locallog0 { file("/var/log/mylog"); };
filter f_locallog0 { facility(local0); };
log { source(src); filter(f_locallog0); destination(locallog0); };

# Exclude locallog0 from the normal syslog, adapt for your current
# setup
destination syslog { file("/var/log/syslog"); };
filter f_syslog { not facility(local0, <others>); };
log { source(src); filter(f_syslog); destination(syslog); };

##### END #####

Don't forget to restart the daemon.

Regards,
Florian Philipp

Am 11.06.2012 14:54, schrieb Giuseppe Penone:

> I'm sorry to bother again, I'm going with syslog which works pretty good
> but seems to write
> to /var/log/syslog only and I cannot find a way to write to a dedicated
> file.
> I'm using the following code:
>
> // gcc giuspexample.c -o giuspexample
> #include <syslog.h>
>
> int  main()
> {
>     setlogmask(LOG_UPTO (LOG_NOTICE));
>
>     openlog("atm", LOG_CONS | LOG_PID | LOG_NDELAY, LOG_LOCAL0);
>
>     syslog(LOG_NOTICE, "Program started by User %d", getuid ());
>     syslog(LOG_INFO, "A tree falls in a forest");
>
>     closelog();
>     return 0;
> }
>
> I followed the instructions on
> http://www.codealias.info/technotes/syslog_simple_example on how to
> change the destination filepath
>
> echo "local0.*  /var/log/mylog" >> /etc/syslog.conf
>
> but does not write on /var/log/mylog (still on /var/log/syslog).
> I'm on (L)ubuntu 12.04.
>
> Many thanks.
>
>
>
> On Fri, Jun 8, 2012 at 11:23 PM, Florian Philipp <lists binarywings net

> <mailto:lists binarywings net>> wrote:
>
>     Am 08.06.2012 09 <tel:08.06.2012%2009>:55, schrieb Giuseppe Penone:

>     > Hi,
>     > I need to log to file but I'm not an expert in it, I would like to
>     > control the number of days logged to do not fill up the disk.
>     > Is there an adviced way to do it in gtkmm?
>     > Thanks.
>     >
>
>     There is a logging stream in gtkmm-utils [1]. It doesn't support
>     truncating the files though. Depending on your application, syslog and
>     logrotate might be a better approach.
>
>     Alternatively, do some timeout logic (using [2]) to change the log file
>     every day and remove old ones.
>
>     [1] http://code.google.com/p/gtkmm-utils/
>     [2]
>     http://developer.gnome.org/glibmm/unstable/classGlib_1_1SignalTimeout.html
>
>     Regards,
>     Florian Philipp
>
>
>     _______________________________________________
>     gtkmm-list mailing list

>     gtkmm-list gnome org <mailto:gtkmm-list gnome org>
>     https://mail.gnome.org/mailman/listinfo/gtkmm-list
>
>



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