On Do, 18.07.19 11:06, Mantas Mikulėnas ([email protected]) wrote: > On Thu, Jul 18, 2019 at 10:32 AM Ulrich Windl < > [email protected]> wrote: > > > >>> Vaibhav Dahiya <[email protected]> schrieb am 18.07.2019 um 02:53 in > > Nachricht > > <[email protected]>: > > > 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?
Local AF_UNIX/SOCK_DGRAM sockets may block and are reliable. Lennart -- Lennart Poettering, Berlin _______________________________________________ systemd-devel mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/systemd-devel
