Rename afb-systemd to systemd

Files "afb-systemd.[ch]" are renamed "systemd.[ch]"
and their functions "afb_systemd_*" are renamed "systemd_*"

Change-Id: I8362a2ca8b71945b54c6ab9a7ead51d9c50bc8e2
Signed-off-by: José Bollo <jose.bollo@iot.bzh>

1 files changed, 103 insertions, 0 deletions

diff --git a/src/systemd.c b/src/systemd.c
new file mode 100644
index 00000000..1adb75ab
--- /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;
+}
+