/*-*- 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 <stddef.h> #include "util.h" #include "sd-bus.h" #include "bus-internal.h" #include "bus-message.h" #include "bus-util.h" #include "bus-match.h" #include "synthesize.h" 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_errnof(sd_bus_message *call, int error, const char *format, ...) { _cleanup_bus_error_free_ sd_bus_error berror = SD_BUS_ERROR_NULL; va_list ap; assert(call); if (call->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) return 0; va_start(ap, format); sd_bus_error_set_errnofv(&berror, error, format, ap); va_end(ap); 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_method_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); } int synthesize_name_acquired(Proxy *p, sd_bus *a, sd_bus *b, sd_bus_message *m) { _cleanup_bus_message_unref_ sd_bus_message *n = NULL; const char *name, *old_owner, *new_owner; int r; assert(p); assert(a); assert(b); assert(m); /* If we get NameOwnerChanged for our own name, we need to * synthesize NameLost/NameAcquired, since socket clients need * that, even though it is obsoleted on kdbus */ if (!a->is_kernel) return 0; if (!sd_bus_message_is_signal(m, "org.freedesktop.DBus", "NameOwnerChanged") || !streq_ptr(m->path, "/org/freedesktop/DBus") || !streq_ptr(m->sender, "org.freedesktop.DBus")) return 0; r = sd_bus_message_read(m, "sss", &name, &old_owner, &new_owner); if (r < 0) return r; r = sd_bus_message_rewind(m, true); if (r < 0) return r; if (streq(old_owner, a->unique_name)) { r = sd_bus_message_new_signal( b, &n, "/org/freedesktop/DBus", "org.freedesktop.DBus", "NameLost"); } else if (streq(new_owner, a->unique_name)) { r = sd_bus_message_new_signal( b, &n, "/org/freedesktop/DBus", "org.freedesktop.DBus", "NameAcquired"); } else return 0; if (r < 0) return r; r = sd_bus_message_append(n, "s", name); if (r < 0) return r; r = bus_message_append_sender(n, "org.freedesktop.DBus"); if (r < 0) return r; r = sd_bus_message_set_destination(n, a->unique_name); if (r < 0) return r; r = bus_seal_synthetic_message(b, n); if (r < 0) return r; return sd_bus_send(b, n, NULL); }