| /*-*- 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); |
| } |