1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2013 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
23 #include "conf-parser.h"
27 #include "bus-internal.h"
28 #include "unit-name.h"
29 #include "cgroup-util.h"
31 static const char *arg_dest_late = "/tmp", *arg_dest = "/tmp";
33 static int create_dbus_files(
41 _cleanup_free_ char *b = NULL, *s = NULL, *lnk = NULL;
42 _cleanup_fclose_ FILE *f = NULL;
46 assert(service || exec);
49 _cleanup_free_ char *a = NULL;
51 s = strjoin("dbus-", name, ".service", NULL);
55 a = strjoin(arg_dest_late, "/", s, NULL);
61 log_error("Failed to create %s: %m", a);
66 "# Automatically generated by systemd-dbus1-generator\n\n"
69 "Description=DBUS1: %s\n"
70 "Documentation=man:systemd-dbus1-generator(8)\n\n"
81 fprintf(f, "User=%s\n", user);
85 fprintf(f, "Environment=DBUS_STARTER_BUS_TYPE=%s\n", type);
87 if (streq(type, "system"))
88 fprintf(f, "Environment=DBUS_STARTER_ADDRESS=" DEFAULT_SYSTEM_BUS_PATH "\n");
89 else if (streq(type, "session")) {
92 run = getenv("XDG_RUNTIME_DIR");
94 log_error("XDG_RUNTIME_DIR not set.");
98 fprintf(f, "Environment=DBUS_STARTER_ADDRESS="KERNEL_USER_BUS_FMT ";" UNIX_USER_BUS_FMT "\n",
99 (unsigned long) getuid(), run);
105 log_error("Failed to write %s: %m", a);
112 b = strjoin(arg_dest_late, "/", name, ".busname", NULL);
118 log_error("Failed to create %s: %m", b);
123 "# Automatically generated by systemd-dbus1-generator\n\n"
126 "Description=DBUS1: %s\n"
127 "Documentation=man:systemd-dbus1-generator(8)\n\n"
138 log_error("Failed to write %s: %m", b);
142 lnk = strjoin(arg_dest_late, "/" SPECIAL_BUSNAMES_TARGET ".wants/", name, ".busname", NULL);
146 mkdir_parents_label(lnk, 0755);
147 if (symlink(b, lnk)) {
148 log_error("Failed to create symlink %s: %m", lnk);
155 static int add_dbus(const char *path, const char *fname, const char *type) {
156 _cleanup_free_ char *name = NULL, *exec = NULL, *user = NULL, *service = NULL;
158 ConfigTableItem table[] = {
159 { "D-BUS Service", "Name", config_parse_string, 0, &name },
160 { "D-BUS Service", "Exec", config_parse_string, 0, &exec },
161 { "D-BUS Service", "User", config_parse_string, 0, &user },
162 { "D-BUS Service", "SystemdService", config_parse_string, 0, &service },
165 _cleanup_fclose_ FILE *f = NULL;
166 _cleanup_free_ char *p = NULL;
172 p = strjoin(path, "/", fname, NULL);
178 if (errno == -ENOENT)
181 log_error("Failed to read %s: %m", p);
185 r = config_parse(NULL, p, f, "D-BUS Service\0", config_item_table_lookup, table, true, false, NULL);
190 log_warning("Activation file %s lacks name setting, ignoring.", p);
194 if (!service_name_is_valid(name)) {
195 log_warning("Bus service name %s is not valid, ignoring.", name);
199 if (streq(name, "org.freedesktop.systemd1")) {
200 log_debug("Skipping %s, identified as systemd.", p);
205 if (!unit_name_is_valid(service, TEMPLATE_INVALID)) {
206 log_warning("Unit name %s is not valid, ignoring.", service);
209 if (!endswith(service, ".service")) {
210 log_warning("Bus names can only activate services, ignoring %s.", p);
214 if (streq(exec, "/bin/false") || !exec) {
215 log_warning("Neither service name nor binary path specified, ignoring %s.", p);
219 if (exec[0] != '/') {
220 log_warning("Exec= in %s does not start with an absolute path, ignoring.", p);
225 return create_dbus_files(p, name, service, exec, user, type);
228 static int parse_dbus_fragments(const char *path, const char *type) {
229 _cleanup_closedir_ DIR *d = NULL;
238 if (errno == -ENOENT)
241 log_error("Failed to enumerate D-Bus activated services: %m");
246 FOREACH_DIRENT(de, d, goto fail) {
249 if (!endswith(de->d_name, ".service"))
252 q = add_dbus(path, de->d_name, type);
260 log_error("Failed to read D-Bus services directory: %m");
264 static int link_busnames_target(const char *units) {
267 f = strappenda(units, "/" SPECIAL_BUSNAMES_TARGET);
268 t = strappenda(arg_dest, "/" SPECIAL_BASIC_TARGET ".wants/" SPECIAL_BUSNAMES_TARGET);
270 mkdir_parents_label(t, 0755);
271 if (symlink(f, t) < 0) {
272 log_error("Failed to create symlink %s: %m", t);
279 static int link_compatibility(const char *units) {
282 f = strappenda(units, "/systemd-bus-proxyd.socket");
283 t = strappenda(arg_dest, "/" SPECIAL_DBUS_SOCKET);
284 mkdir_parents_label(t, 0755);
285 if (symlink(f, t) < 0) {
286 log_error("Failed to create symlink %s: %m", t);
290 f = strappenda(units, "/systemd-bus-proxyd.socket");
291 t = strappenda(arg_dest, "/" SPECIAL_SOCKETS_TARGET ".wants/systemd-bus-proxyd.socket");
292 mkdir_parents_label(t, 0755);
293 if (symlink(f, t) < 0) {
294 log_error("Failed to create symlink %s: %m", t);
298 t = strappenda(arg_dest, "/" SPECIAL_DBUS_SERVICE);
299 if (symlink("/dev/null", t) < 0) {
300 log_error("Failed to mask %s: %m", t);
307 int main(int argc, char *argv[]) {
308 const char *path, *type, *units;
311 if (argc > 1 && argc != 4) {
312 log_error("This program takes three or no arguments.");
318 arg_dest_late = argv[3];
321 log_set_target(LOG_TARGET_SAFE);
322 log_parse_environment();
327 if (access("/dev/kdbus/control", F_OK) < 0)
330 r = cg_pid_get_owner_uid(0, NULL);
332 path = "/usr/share/dbus-1/services";
334 units = USER_DATA_UNIT_PATH;
335 } else if (r == -ENOENT) {
336 path = "/usr/share/dbus-1/system-services";
338 units = SYSTEM_DATA_UNIT_PATH;
340 log_error("Failed to determine whether we are running as user or system instance: %s", strerror(-r));
344 r = parse_dbus_fragments(path, type);
346 /* FIXME: One day this should just be pulled in statically from basic.target */
347 q = link_busnames_target(units);
351 q = link_compatibility(units);
355 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;