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f3c47246 DM |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | Copyright 2013 Daniel Mack | |
8 | Copyright 2014 Kay Sievers | |
9 | ||
10 | systemd is free software; you can redistribute it and/or modify it | |
11 | under the terms of the GNU Lesser General Public License as published by | |
12 | the Free Software Foundation; either version 2.1 of the License, or | |
13 | (at your option) any later version. | |
14 | ||
15 | systemd is distributed in the hope that it will be useful, but | |
16 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | Lesser General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU Lesser General Public License | |
21 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
22 | ***/ | |
23 | ||
f3c47246 DM |
24 | #include <stddef.h> |
25 | ||
f3c47246 DM |
26 | #include "util.h" |
27 | #include "sd-bus.h" | |
28 | #include "bus-internal.h" | |
29 | #include "bus-message.h" | |
30 | #include "bus-util.h" | |
e23bc0e7 | 31 | #include "bus-match.h" |
f3c47246 DM |
32 | #include "synthesize.h" |
33 | ||
52fa7a3a | 34 | int synthetic_driver_send(sd_bus *b, sd_bus_message *m) { |
f3c47246 DM |
35 | int r; |
36 | ||
37 | assert(b); | |
38 | assert(m); | |
39 | ||
40 | r = bus_message_append_sender(m, "org.freedesktop.DBus"); | |
41 | if (r < 0) | |
42 | return r; | |
43 | ||
44 | r = bus_seal_synthetic_message(b, m); | |
45 | if (r < 0) | |
46 | return r; | |
47 | ||
48 | return sd_bus_send(b, m, NULL); | |
49 | } | |
50 | ||
51 | int synthetic_reply_method_error(sd_bus_message *call, const sd_bus_error *e) { | |
52 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
53 | int r; | |
54 | ||
55 | assert(call); | |
56 | ||
57 | if (call->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) | |
58 | return 0; | |
59 | ||
60 | r = sd_bus_message_new_method_error(call, &m, e); | |
61 | if (r < 0) | |
62 | return r; | |
63 | ||
64 | return synthetic_driver_send(call->bus, m); | |
65 | } | |
66 | ||
67 | int synthetic_reply_method_errorf(sd_bus_message *call, const char *name, const char *format, ...) { | |
68 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; | |
69 | va_list ap; | |
70 | ||
71 | va_start(ap, format); | |
72 | bus_error_setfv(&error, name, format, ap); | |
73 | va_end(ap); | |
74 | ||
75 | return synthetic_reply_method_error(call, &error); | |
76 | } | |
77 | ||
78 | int synthetic_reply_method_errno(sd_bus_message *call, int error, const sd_bus_error *p) { | |
f3c47246 DM |
79 | _cleanup_bus_error_free_ sd_bus_error berror = SD_BUS_ERROR_NULL; |
80 | ||
81 | assert(call); | |
82 | ||
83 | if (call->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) | |
84 | return 0; | |
85 | ||
86 | if (sd_bus_error_is_set(p)) | |
87 | return synthetic_reply_method_error(call, p); | |
88 | ||
89 | sd_bus_error_set_errno(&berror, error); | |
90 | ||
91 | return synthetic_reply_method_error(call, &berror); | |
92 | } | |
93 | ||
5f6cb091 LP |
94 | int synthetic_reply_method_errnof(sd_bus_message *call, int error, const char *format, ...) { |
95 | _cleanup_bus_error_free_ sd_bus_error berror = SD_BUS_ERROR_NULL; | |
96 | va_list ap; | |
97 | ||
98 | assert(call); | |
99 | ||
100 | if (call->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) | |
101 | return 0; | |
102 | ||
103 | va_start(ap, format); | |
104 | sd_bus_error_set_errnofv(&berror, error, format, ap); | |
105 | va_end(ap); | |
106 | ||
107 | return synthetic_reply_method_error(call, &berror); | |
108 | } | |
109 | ||
f3c47246 DM |
110 | int synthetic_reply_method_return(sd_bus_message *call, const char *types, ...) { |
111 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
112 | int r; | |
113 | ||
114 | assert(call); | |
115 | ||
116 | if (call->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) | |
117 | return 0; | |
118 | ||
119 | r = sd_bus_message_new_method_return(call, &m); | |
120 | if (r < 0) | |
121 | return r; | |
122 | ||
123 | if (!isempty(types)) { | |
124 | va_list ap; | |
125 | ||
126 | va_start(ap, types); | |
127 | r = bus_message_append_ap(m, types, ap); | |
128 | va_end(ap); | |
129 | if (r < 0) | |
130 | return r; | |
131 | } | |
132 | ||
133 | return synthetic_driver_send(call->bus, m); | |
134 | } | |
135 | ||
1433efd2 | 136 | int synthetic_reply_method_return_strv(sd_bus_message *call, char **l) { |
f3c47246 DM |
137 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; |
138 | int r; | |
139 | ||
140 | assert(call); | |
141 | ||
142 | if (call->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) | |
143 | return 0; | |
144 | ||
145 | r = sd_bus_message_new_method_return(call, &m); | |
146 | if (r < 0) | |
147 | return synthetic_reply_method_errno(call, r, NULL); | |
148 | ||
149 | r = sd_bus_message_append_strv(m, l); | |
150 | if (r < 0) | |
151 | return synthetic_reply_method_errno(call, r, NULL); | |
152 | ||
153 | return synthetic_driver_send(call->bus, m); | |
154 | } | |
5e2de0eb | 155 | |
e23bc0e7 | 156 | int synthesize_name_acquired(Proxy *p, sd_bus *a, sd_bus *b, sd_bus_message *m) { |
5e2de0eb DM |
157 | _cleanup_bus_message_unref_ sd_bus_message *n = NULL; |
158 | const char *name, *old_owner, *new_owner; | |
159 | int r; | |
160 | ||
e23bc0e7 | 161 | assert(p); |
5e2de0eb DM |
162 | assert(a); |
163 | assert(b); | |
164 | assert(m); | |
165 | ||
166 | /* If we get NameOwnerChanged for our own name, we need to | |
167 | * synthesize NameLost/NameAcquired, since socket clients need | |
168 | * that, even though it is obsoleted on kdbus */ | |
169 | ||
170 | if (!a->is_kernel) | |
171 | return 0; | |
172 | ||
173 | if (!sd_bus_message_is_signal(m, "org.freedesktop.DBus", "NameOwnerChanged") || | |
174 | !streq_ptr(m->path, "/org/freedesktop/DBus") || | |
175 | !streq_ptr(m->sender, "org.freedesktop.DBus")) | |
176 | return 0; | |
177 | ||
178 | r = sd_bus_message_read(m, "sss", &name, &old_owner, &new_owner); | |
179 | if (r < 0) | |
180 | return r; | |
181 | ||
182 | r = sd_bus_message_rewind(m, true); | |
183 | if (r < 0) | |
184 | return r; | |
185 | ||
186 | if (streq(old_owner, a->unique_name)) { | |
187 | ||
188 | r = sd_bus_message_new_signal( | |
189 | b, | |
190 | &n, | |
191 | "/org/freedesktop/DBus", | |
192 | "org.freedesktop.DBus", | |
193 | "NameLost"); | |
194 | ||
195 | } else if (streq(new_owner, a->unique_name)) { | |
196 | ||
197 | r = sd_bus_message_new_signal( | |
198 | b, | |
199 | &n, | |
200 | "/org/freedesktop/DBus", | |
201 | "org.freedesktop.DBus", | |
202 | "NameAcquired"); | |
203 | } else | |
204 | return 0; | |
205 | ||
206 | if (r < 0) | |
207 | return r; | |
208 | ||
209 | r = sd_bus_message_append(n, "s", name); | |
210 | if (r < 0) | |
211 | return r; | |
212 | ||
213 | r = bus_message_append_sender(n, "org.freedesktop.DBus"); | |
214 | if (r < 0) | |
215 | return r; | |
216 | ||
e3c57a86 DH |
217 | r = sd_bus_message_set_destination(n, a->unique_name); |
218 | if (r < 0) | |
219 | return r; | |
220 | ||
5e2de0eb DM |
221 | r = bus_seal_synthetic_message(b, n); |
222 | if (r < 0) | |
223 | return r; | |
224 | ||
a87d2ed1 | 225 | return sd_bus_send(b, n, NULL); |
5e2de0eb | 226 | } |