On Thu, Jul 18, 2019 at 10:32 AM Ulrich Windl <Ulrich.Windl@xxxxxxxxxxxxxxxxxxxx> wrote:
>>> Vaibhav Dahiya <vdahiya@xxxxxxxx> schrieb am 18.07.2019 um 02:53 in Nachricht
<5d2fc2f0.1c69fb81.214d0.1aca@xxxxxxxxxxxxx>:
> Hello,
>
> I am using sd_journal_send api() api call to log messages on syslog server.
> I see that this uses
> sendmsg(fd, &mh, MSG_NOSIGNAL) call.
Aren't syslog messages UDP anyway? When would an UDP send block?
No, program APIs use Unix sockets (/dev/log, /run/systemd/journal/socket). You only get UDP when your local syslog daemon is configured to forward elsewhere.
That said, both are datagram sockets, I'm not sure whether sending to Unix dgram sockets can block or not?
> Is there a provision of passing MSG_DONTWAIT flag to this.
> or else have a separate api like sd_journal_send_non_blocking().
> I want to use this call in an application where I cant make a blocking call
> for logging.
>
> Regards
>
> Sent from Mail for Windows 10
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Mantas Mikulėnas
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