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authorTom Gundersen <teg@jklm.no>2014-02-28 01:02:01 +0100
committerTom Gundersen <teg@jklm.no>2014-02-28 01:17:38 +0100
commit020d59000f86b3d98be763eaee6a2671f0427e46 (patch)
tree174fd53c7a70b96f52a74b3a05fdcad7fdbf92f5 /src/network/networkd-wait-online.c
parentfe8db0c5ee3365a2fc80ee7ebffa238f9a0a2ae2 (diff)
networkd: add networkd-wait-online
This is mostly a proof of concept to try sd-network, so we don't hook it up with a .service file quite yet. We probably want it to be more clever about deciding when we are 'online'. The binary will wait for at least one network managed by networkd, and until all networks managed by networkd are configured.
Diffstat (limited to 'src/network/networkd-wait-online.c')
-rw-r--r--src/network/networkd-wait-online.c142
1 files changed, 142 insertions, 0 deletions
diff --git a/src/network/networkd-wait-online.c b/src/network/networkd-wait-online.c
new file mode 100644
index 0000000000..900dc05125
--- /dev/null
+++ b/src/network/networkd-wait-online.c
@@ -0,0 +1,142 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2013 Tom Gundersen <teg@jklm.no>
+
+ 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 "sd-event.h"
+#include "sd-daemon.h"
+#include "sd-network.h"
+
+#include "util.h"
+
+static bool all_configured(void) {
+ _cleanup_free_ unsigned *indices = NULL;
+ bool one_ready = false;
+ int r, n, i;
+
+ n = sd_network_get_ifindices(&indices);
+ if (n <= 0)
+ return false;
+
+ for (i = 0; i < n; i++) {
+ _cleanup_free_ char *state = NULL;
+
+ r = sd_network_get_link_state(indices[i], &state);
+ if (r < 0)
+ return false;
+
+ if (streq(state, "configured"))
+ one_ready = true;
+
+ if (!streq(state, "configured") && !streq(state, "unmanaged"))
+ return false;
+ }
+
+ if (one_ready)
+ return true;
+
+ return false;
+}
+
+static int event_handler(sd_event_source *s, int fd, uint32_t revents,
+ void *userdata) {
+ sd_event *event = userdata;
+
+ assert(event);
+
+ if (all_configured())
+ sd_event_exit(event, 0);
+
+ return 1;
+}
+
+int main(int argc, char *argv[]) {
+ sd_event *event;
+ sd_event_source *event_source;
+ sd_network_monitor *monitor;
+ int r, fd, events;
+
+ log_set_target(LOG_TARGET_AUTO);
+ log_parse_environment();
+ log_open();
+
+ umask(0022);
+
+ if (argc != 1) {
+ log_error("This program takes no arguments.");
+ r = -EINVAL;
+ goto out;
+ }
+
+ r = sd_network_monitor_new(NULL, &monitor);
+ if (r < 0) {
+ log_error("Could not create monitor: %s", strerror(-r));
+ goto out;
+ }
+
+ r = sd_event_new(&event);
+ if (r < 0) {
+ log_error("Could not create event: %s", strerror(-r));
+ goto out;
+ }
+
+ fd = sd_network_monitor_get_fd(monitor);
+ if (fd < 0) {
+ log_error("Could not get monitor fd: %s", strerror(-r));
+ goto out;
+ }
+
+ events = sd_network_monitor_get_events(monitor);
+ if (events < 0) {
+ log_error("Could not get monitor events: %s", strerror(-r));
+ goto out;
+ }
+
+ r = sd_event_add_io(event, &event_source, fd, events, &event_handler,
+ event);
+ if (r < 0) {
+ log_error("Could not add io event source: %s", strerror(-r));
+ goto out;
+ }
+
+ if (all_configured()) {
+ r = 0;
+ goto out;
+ }
+
+ sd_notify(false,
+ "READY=1\n"
+ "STATUS=Waiting for network connecitons...");
+
+ r = sd_event_loop(event);
+ if (r < 0) {
+ log_error("Event loop failed: %s", strerror(-r));
+ goto out;
+ }
+
+out:
+ sd_notify(false,
+ "STATUS=All interfaces configured...");
+
+ sd_event_source_unref(event_source);
+ sd_event_unref(event);
+ sd_network_monitor_unref(monitor);
+
+ return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+}