Rename afb-systemd to systemd

[src/app-framework-binder.git] / src / systemd.c

diff --git a/src/systemd.c b/src/systemd.c
new file mode 100644 (file)
index 0000000..1adb75a
--- /dev/null
+++ b/src/systemd.c
@@ -0,0 +1,103 @@
+/*
+ * Copyright (C) 2015-2019 "IoT.bzh"
+ * Author José Bollo <jose.bollo@iot.bzh>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define _GNU_SOURCE
+
+#include <unistd.h>
+#include <errno.h>
+
+#include <systemd/sd-event.h>
+#include <systemd/sd-bus.h>
+#include <systemd/sd-daemon.h>
+
+#include "systemd.h"
+#include "jobs.h"
+
+static struct sd_bus *sdbusopen(struct sd_bus **p, int (*f)(struct sd_bus **))
+{
+       if (*p == NULL) {
+               int rc = f(p);
+               if (rc < 0) {
+                       errno = -rc;
+                       *p = NULL;
+               } else {
+                       rc = sd_bus_attach_event(*p, systemd_get_event_loop(), 0);
+                       if (rc < 0) {
+                               sd_bus_unref(*p);
+                               errno = -rc;
+                               *p = NULL;
+                       }
+               }
+       }
+       return *p;
+}
+
+struct sd_event *systemd_get_event_loop()
+{
+       return jobs_get_sd_event();
+}
+
+struct sd_bus *systemd_get_user_bus()
+{
+       static struct sd_bus *result = NULL;
+       return sdbusopen((void*)&result, (void*)sd_bus_open_user);
+}
+
+struct sd_bus *systemd_get_system_bus()
+{
+       static struct sd_bus *result = NULL;
+       return sdbusopen((void*)&result, (void*)sd_bus_open_system);
+}
+
+static char **fds_names()
+{
+       static char *null;
+       static char **names;
+
+       int rc;
+
+       if (!names) {
+               rc = sd_listen_fds_with_names(1, &names);
+               if (rc <= 0) {
+                       errno = -rc;
+                       names = &null;
+               }
+       }
+       return names;
+}
+
+int systemd_fds_init()
+{
+       errno = 0;
+       fds_names();
+       return -!!errno;
+}
+
+int systemd_fds_for(const char *name)
+{
+       int idx;
+       char **names;
+
+       names = fds_names();
+       for (idx = 0 ; names[idx] != NULL ; idx++)
+               if (!strcmp(name, names[idx]))
+                       return idx + SD_LISTEN_FDS_START;
+
+       errno = ENOENT;
+       return -1;
+}
+