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authorSebastian Thorarensen <sebth@naju.se>2014-03-14 00:38:15 +0100
committerLennart Poettering <lennart@poettering.net>2014-03-14 22:05:25 +0100
commit40b71e89bae4e51768db4dc50ec64c1e9c96eec4 (patch)
tree39de34bcee5d996a8e98ef792fc7201276b0cf63 /src/journal/journald-wall.c
parent9003d9b0d628be059922e522fd35f9c5b4d8b039 (diff)
journald: add support for wall forwarding
This will let journald forward logs as messages sent to all logged in users (like wall). Two options are added: * ForwardToWall (default yes) * MaxLevelWall (default emerg) 'ForwardToWall' is overridable by kernel command line option 'systemd.journald.forward_to_wall'. This is used to emulate the traditional syslogd behaviour of sending emergency messages to all logged in users.
Diffstat (limited to 'src/journal/journald-wall.c')
-rw-r--r--src/journal/journald-wall.c69
1 files changed, 69 insertions, 0 deletions
diff --git a/src/journal/journald-wall.c b/src/journal/journald-wall.c
new file mode 100644
index 0000000000..fcbd9183fe
--- /dev/null
+++ b/src/journal/journald-wall.c
@@ -0,0 +1,69 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2014 Sebastian Thorarensen
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "utmp-wtmp.h"
+#include "journald-server.h"
+#include "journald-wall.h"
+
+void server_forward_wall(
+ Server *s,
+ int priority,
+ const char *identifier,
+ const char *message,
+ struct ucred *ucred) {
+
+ _cleanup_free_ char *ident_buf = NULL, *l_buf = NULL;
+ const char *l;
+ int r;
+
+ assert(s);
+ assert(message);
+
+ if (LOG_PRI(priority) > s->max_level_wall)
+ return;
+
+ if (ucred) {
+ if (!identifier) {
+ get_process_comm(ucred->pid, &ident_buf);
+ identifier = ident_buf;
+ }
+
+ if (asprintf(&l_buf, "%s["PID_FMT"]: %s", strempty(identifier), ucred->pid, message) < 0) {
+ log_oom();
+ return;
+ }
+
+ l = l_buf;
+
+ } else if (identifier) {
+
+ l = l_buf = strjoin(identifier, ": ", message, NULL);
+ if (!l_buf) {
+ log_oom();
+ return;
+ }
+ } else
+ l = message;
+
+ r = utmp_wall(l, "systemd-journald", NULL);
+ if (r < 0)
+ log_debug("Failed to send wall message: %s", strerror(-r));
+}