Hi Lennart, I found a workaround. When looking at the source code for sd_journal_print(), I saw that SYSLOG_IDENTIFIER defaults to the string pointed to by program_invocation_short_name (defined in errno.h). So I simply create a new string with the text that I want to assign to SYSLOG_IDENTIFIER and I make program_invocation_short_name point to it.
It may not be the prettiest fix, but it works for the daemons I'm instantiating. Thanks, Martin Martin Belanger Sr. Software Engineer[image: Cyan]1383 North McDowell Blvd. Petaluma, CA 94954M(707) 481-3392emartin.belan...@cyaninc.comwww.cyaninc.com[image: Facebook] <http://www.facebook.com/CyanInc> [image: LinkedIn] <http://www.linkedin.com/company/cyan-inc?trk=hb_tab_compy_id_2171992> [image: Twitter] <http://twitter.com/CyanNews> On Tue, Jun 9, 2015 at 3:16 AM, Lennart Poettering <lenn...@poettering.net> wrote: > On Tue, 02.06.15 20:31, Martin Belanger (martin.belan...@cyaninc.com) > wrote: > > > I'm using systemd 219 (Ubuntu 15.04). > > > > I have three instances of a daemon running. I use SyslogIdentifier to > > give each of them a unique identifier (e.g. myproc-1, myproc-2, > > myproc-3). I also redirect stdout/stderr to the journal using > > StandardOutput=journal and StandardError=journal. > > > > I noticed that messages sent to the journal with printf (i.e. stdout) > > get the proper SYSLOG_IDENTIFIER. However, messages send to the > > journal with sd_journal_print() get the default SYSLOG_IDENTIFIER > > (i.e. the process name). I also tried sd_journal_send() and get the > > same result. > > > > Any thoughts as to why this is happening? > > SyslogIdentifier only really applies to stdout/stderr messages, not to > native journal messages, which will not carry that id at all. > > The only reason the setting exists is because it's useful to set > something there because stdout/stderr doesn't carry enough information > for this, and because the same stdout/stderr stream can be shared > among multiple processes it's difficult and misleading to > automatically derive the identifier from them... > > Hence: I'd really prefer fi we didn't have that option at all, we > justed added it, because it was difficult to do without... > > Lennart > > -- > Lennart Poettering, Red Hat >
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