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",
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"
139 log_error("Failed to write %s: %m", b);
143 lnk = strjoin(arg_dest_late, "/" SPECIAL_BUSNAMES_TARGET ".wants/", name, ".busname", NULL);
147 mkdir_parents_label(lnk, 0755);
148 if (symlink(b, lnk)) {
149 log_error("Failed to create symlink %s: %m", lnk);
156 static int add_dbus(const char *path, const char *fname, const char *type) {
157 _cleanup_free_ char *name = NULL, *exec = NULL, *user = NULL, *service = NULL;
159 const ConfigTableItem table[] = {
160 { "D-BUS Service", "Name", config_parse_string, 0, &name },
161 { "D-BUS Service", "Exec", config_parse_string, 0, &exec },
162 { "D-BUS Service", "User", config_parse_string, 0, &user },
163 { "D-BUS Service", "SystemdService", config_parse_string, 0, &service },
172 p = strappenda3(path, "/", fname);
173 r = config_parse(NULL, p, NULL,
175 config_item_table_lookup, table,
176 true, false, true, NULL);
181 log_warning("Activation file %s lacks name setting, ignoring.", p);
185 if (!service_name_is_valid(name)) {
186 log_warning("Bus service name %s is not valid, ignoring.", name);
190 if (streq(name, "org.freedesktop.systemd1")) {
191 log_debug("Skipping %s, identified as systemd.", p);
196 if (!unit_name_is_valid(service, TEMPLATE_INVALID)) {
197 log_warning("Unit name %s is not valid, ignoring.", service);
200 if (!endswith(service, ".service")) {
201 log_warning("Bus names can only activate services, ignoring %s.", p);
205 if (streq(exec, "/bin/false") || !exec) {
206 log_warning("Neither service name nor binary path specified, ignoring %s.", p);
210 if (exec[0] != '/') {
211 log_warning("Exec= in %s does not start with an absolute path, ignoring.", p);
216 return create_dbus_files(p, name, service, exec, user, type);
219 static int parse_dbus_fragments(const char *path, const char *type) {
220 _cleanup_closedir_ DIR *d = NULL;
229 if (errno == -ENOENT)
232 log_error("Failed to enumerate D-Bus activated services: %m");
237 FOREACH_DIRENT(de, d, goto fail) {
240 if (!endswith(de->d_name, ".service"))
243 q = add_dbus(path, de->d_name, type);
251 log_error("Failed to read D-Bus services directory: %m");
255 static int link_busnames_target(const char *units) {
258 f = strappenda(units, "/" SPECIAL_BUSNAMES_TARGET);
259 t = strappenda(arg_dest, "/" SPECIAL_BASIC_TARGET ".wants/" SPECIAL_BUSNAMES_TARGET);
261 mkdir_parents_label(t, 0755);
262 if (symlink(f, t) < 0) {
263 log_error("Failed to create symlink %s: %m", t);
270 static int link_compatibility(const char *units) {
273 f = strappenda(units, "/systemd-bus-proxyd.socket");
274 t = strappenda(arg_dest, "/" SPECIAL_DBUS_SOCKET);
275 mkdir_parents_label(t, 0755);
276 if (symlink(f, t) < 0) {
277 log_error("Failed to create symlink %s: %m", t);
281 f = strappenda(units, "/systemd-bus-proxyd.socket");
282 t = strappenda(arg_dest, "/" SPECIAL_SOCKETS_TARGET ".wants/systemd-bus-proxyd.socket");
283 mkdir_parents_label(t, 0755);
284 if (symlink(f, t) < 0) {
285 log_error("Failed to create symlink %s: %m", t);
289 t = strappenda(arg_dest, "/" SPECIAL_DBUS_SERVICE);
290 if (symlink("/dev/null", t) < 0) {
291 log_error("Failed to mask %s: %m", t);
298 int main(int argc, char *argv[]) {
299 const char *path, *type, *units;
302 if (argc > 1 && argc != 4) {
303 log_error("This program takes three or no arguments.");
309 arg_dest_late = argv[3];
312 log_set_target(LOG_TARGET_SAFE);
313 log_parse_environment();
318 if (access("/dev/kdbus/control", F_OK) < 0)
321 r = cg_pid_get_owner_uid(0, NULL);
323 path = "/usr/share/dbus-1/services";
325 units = USER_DATA_UNIT_PATH;
326 } else if (r == -ENOENT) {
327 path = "/usr/share/dbus-1/system-services";
329 units = SYSTEM_DATA_UNIT_PATH;
331 log_error("Failed to determine whether we are running as user or system instance: %s", strerror(-r));
335 r = parse_dbus_fragments(path, type);
337 /* FIXME: One day this should just be pulled in statically from basic.target */
338 q = link_busnames_target(units);
342 q = link_compatibility(units);
346 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;