bus-proxy: factor out code for driver handling and message synthesis

[elogind.git] / src / bus-proxyd / synthesize.c

diff --git a/src/bus-proxyd/synthesize.c b/src/bus-proxyd/synthesize.c
new file mode 100644 (file)
index 0000000..e98a97e
--- /dev/null
+++ b/src/bus-proxyd/synthesize.c
@@ -0,0 +1,146 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+  Copyright 2013 Daniel Mack
+  Copyright 2014 Kay Sievers
+
+  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 <sys/types.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <stddef.h>
+
+#include "log.h"
+#include "util.h"
+#include "sd-bus.h"
+#include "bus-internal.h"
+#include "bus-message.h"
+#include "bus-util.h"
+#include "strv.h"
+#include "def.h"
+#include "bus-control.h"
+#include "synthesize.h"
+
+static int synthetic_driver_send(sd_bus *b, sd_bus_message *m) {
+        int r;
+
+        assert(b);
+        assert(m);
+
+        r = bus_message_append_sender(m, "org.freedesktop.DBus");
+        if (r < 0)
+                return r;
+
+        r = bus_seal_synthetic_message(b, m);
+        if (r < 0)
+                return r;
+
+        return sd_bus_send(b, m, NULL);
+}
+
+int synthetic_reply_method_error(sd_bus_message *call, const sd_bus_error *e) {
+        _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
+        int r;
+
+        assert(call);
+
+        if (call->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED)
+                return 0;
+
+        r = sd_bus_message_new_method_error(call, &m, e);
+        if (r < 0)
+                return r;
+
+        return synthetic_driver_send(call->bus, m);
+}
+
+int synthetic_reply_method_errorf(sd_bus_message *call, const char *name, const char *format, ...) {
+        _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
+        va_list ap;
+
+        va_start(ap, format);
+        bus_error_setfv(&error, name, format, ap);
+        va_end(ap);
+
+        return synthetic_reply_method_error(call, &error);
+}
+
+int synthetic_reply_method_errno(sd_bus_message *call, int error, const sd_bus_error *p) {
+
+        _cleanup_bus_error_free_ sd_bus_error berror = SD_BUS_ERROR_NULL;
+
+        assert(call);
+
+        if (call->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED)
+                return 0;
+
+        if (sd_bus_error_is_set(p))
+                return synthetic_reply_method_error(call, p);
+
+        sd_bus_error_set_errno(&berror, error);
+
+        return synthetic_reply_method_error(call, &berror);
+}
+
+int synthetic_reply_method_return(sd_bus_message *call, const char *types, ...) {
+        _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
+        int r;
+
+        assert(call);
+
+        if (call->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED)
+                return 0;
+
+        r = sd_bus_message_new_method_return(call, &m);
+        if (r < 0)
+                return r;
+
+        if (!isempty(types)) {
+                va_list ap;
+
+                va_start(ap, types);
+                r = bus_message_append_ap(m, types, ap);
+                va_end(ap);
+                if (r < 0)
+                        return r;
+        }
+
+        return synthetic_driver_send(call->bus, m);
+}
+
+int synthetic_reply_return_strv(sd_bus_message *call, char **l) {
+        _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
+        int r;
+
+        assert(call);
+
+        if (call->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED)
+                return 0;
+
+        r = sd_bus_message_new_method_return(call, &m);
+        if (r < 0)
+                return synthetic_reply_method_errno(call, r, NULL);
+
+        r = sd_bus_message_append_strv(m, l);
+        if (r < 0)
+                return synthetic_reply_method_errno(call, r, NULL);
+
+        return synthetic_driver_send(call->bus, m);
+}