diff options
| author | Alexander Bluhm <bluhm@cvs.openbsd.org> | 2021-03-09 15:08:24 +0000 |
|---|---|---|
| committer | Alexander Bluhm <bluhm@cvs.openbsd.org> | 2021-03-09 15:08:24 +0000 |
| commit | 459d4e795faae9e9a5825a299f7e5063446853a0 (patch) | |
| tree | 86bfad1536a640c54db5ba58c50eba42662f303b /usr.sbin | |
| parent | 4cc6cf66897987e18200a48c515983ae3f121690 (diff) | |
Early daemons like dhcpleased(8), slaacd(8), unwind(8), resolvd(8)
are started before syslogd(8). This resulted in ugly sendsyslog(2)
dropped logs and the real message was lost.
Create a temporary stash for log messages within the kernel. It
has a limited size of 100 messages, and each message is truncated
to 8192 bytes. When the stash is exhausted, the well-known dropped
message is generated with a counter. After syslogd(8) has setup
everything, it sends a debug line through libc to flush the kernel
stash. Then syslogd receives all messages from the kernel before
the usual logs.
OK deraadt@ visa@
Diffstat (limited to 'usr.sbin')
| -rw-r--r-- | usr.sbin/syslogd/syslogd.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/usr.sbin/syslogd/syslogd.c b/usr.sbin/syslogd/syslogd.c index 9b324a61dfb..98c79c80b82 100644 --- a/usr.sbin/syslogd/syslogd.c +++ b/usr.sbin/syslogd/syslogd.c @@ -1,4 +1,4 @@ -/* $OpenBSD: syslogd.c,v 1.264 2020/09/14 20:36:01 bluhm Exp $ */ +/* $OpenBSD: syslogd.c,v 1.265 2021/03/09 15:08:23 bluhm Exp $ */ /* * Copyright (c) 2014-2017 Alexander Bluhm <bluhm@genua.de> @@ -891,6 +891,10 @@ main(int argc, char *argv[]) if (sigprocmask(SIG_SETMASK, &sigmask, NULL) == -1) err(1, "sigprocmask unblock"); + /* Send message via libc, flushes log stash in kernel. */ + openlog("syslogd", LOG_PID, LOG_SYSLOG); + syslog(LOG_DEBUG, "running"); + event_dispatch(); /* NOTREACHED */ return (0); |