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;
47 assert(service || exec);
50 _cleanup_free_ char *a = NULL;
52 s = strjoin("dbus-", name, ".service", NULL);
56 a = strjoin(arg_dest_late, "/", s, NULL);
62 return log_error_errno(errno, "Failed to create %s: %m", a);
65 "# Automatically generated by systemd-dbus1-generator\n\n"
68 "Description=DBUS1: %s\n"
69 "Documentation=man:systemd-dbus1-generator(8)\n\n"
80 fprintf(f, "User=%s\n", user);
84 fprintf(f, "Environment=DBUS_STARTER_BUS_TYPE=%s\n", type);
86 if (streq(type, "system"))
87 fprintf(f, "Environment=DBUS_STARTER_ADDRESS=" DEFAULT_SYSTEM_BUS_ADDRESS "\n");
88 else if (streq(type, "session")) {
91 run = getenv("XDG_RUNTIME_DIR");
93 log_error("XDG_RUNTIME_DIR not set.");
97 fprintf(f, "Environment=DBUS_STARTER_ADDRESS="KERNEL_USER_BUS_ADDRESS_FMT ";" UNIX_USER_BUS_ADDRESS_FMT "\n",
102 r = fflush_and_check(f);
104 return log_error_errno(r, "Failed to write %s: %m", a);
112 b = strjoin(arg_dest_late, "/", name, ".busname", NULL);
118 return log_error_errno(errno, "Failed to create %s: %m", b);
121 "# Automatically generated by systemd-dbus1-generator\n\n"
124 "Description=DBUS1: %s\n"
125 "Documentation=man:systemd-dbus1-generator(8)\n\n"
135 r = fflush_and_check(f);
137 return log_error_errno(r, "Failed to write %s: %m", b);
139 lnk = strjoin(arg_dest_late, "/" SPECIAL_BUSNAMES_TARGET ".wants/", name, ".busname", NULL);
143 mkdir_parents_label(lnk, 0755);
145 return log_error_errno(errno, "Failed to create symlink %s: %m", lnk);
150 static int add_dbus(const char *path, const char *fname, const char *type) {
151 _cleanup_free_ char *name = NULL, *exec = NULL, *user = NULL, *service = NULL;
153 const ConfigTableItem table[] = {
154 { "D-BUS Service", "Name", config_parse_string, 0, &name },
155 { "D-BUS Service", "Exec", config_parse_string, 0, &exec },
156 { "D-BUS Service", "User", config_parse_string, 0, &user },
157 { "D-BUS Service", "SystemdService", config_parse_string, 0, &service },
167 p = strappenda(path, "/", fname);
168 r = config_parse(NULL, p, NULL,
170 config_item_table_lookup, table,
171 true, false, true, NULL);
176 log_warning("Activation file %s lacks name setting, ignoring.", p);
180 if (!service_name_is_valid(name)) {
181 log_warning("Bus service name %s is not valid, ignoring.", name);
185 if (streq(name, "org.freedesktop.systemd1")) {
186 log_debug("Skipping %s, identified as systemd.", p);
191 if (!unit_name_is_valid(service, TEMPLATE_INVALID)) {
192 log_warning("Unit name %s is not valid, ignoring.", service);
195 if (!endswith(service, ".service")) {
196 log_warning("Bus names can only activate services, ignoring %s.", p);
200 if (streq(exec, "/bin/false") || !exec) {
201 log_warning("Neither service name nor binary path specified, ignoring %s.", p);
205 if (exec[0] != '/') {
206 log_warning("Exec= in %s does not start with an absolute path, ignoring.", p);
211 return create_dbus_files(p, name, service, exec, user, type);
214 static int parse_dbus_fragments(const char *path, const char *type) {
215 _cleanup_closedir_ DIR *d = NULL;
224 if (errno == -ENOENT)
227 log_error_errno(errno, "Failed to enumerate D-Bus activated services: %m");
232 FOREACH_DIRENT(de, d, goto fail) {
235 if (!endswith(de->d_name, ".service"))
238 q = add_dbus(path, de->d_name, type);
246 log_error_errno(errno, "Failed to read D-Bus services directory: %m");
250 static int link_busnames_target(const char *units) {
253 f = strappenda(units, "/" SPECIAL_BUSNAMES_TARGET);
254 t = strappenda(arg_dest, "/" SPECIAL_BASIC_TARGET ".wants/" SPECIAL_BUSNAMES_TARGET);
256 mkdir_parents_label(t, 0755);
257 if (symlink(f, t) < 0)
258 return log_error_errno(errno, "Failed to create symlink %s: %m", t);
263 static int link_compatibility(const char *units) {
266 f = strappenda(units, "/systemd-bus-proxyd.socket");
267 t = strappenda(arg_dest, "/" SPECIAL_DBUS_SOCKET);
268 mkdir_parents_label(t, 0755);
269 if (symlink(f, t) < 0)
270 return log_error_errno(errno, "Failed to create symlink %s: %m", t);
272 f = strappenda(units, "/systemd-bus-proxyd.socket");
273 t = strappenda(arg_dest, "/" SPECIAL_SOCKETS_TARGET ".wants/systemd-bus-proxyd.socket");
274 mkdir_parents_label(t, 0755);
275 if (symlink(f, t) < 0)
276 return log_error_errno(errno, "Failed to create symlink %s: %m", t);
278 t = strappenda(arg_dest, "/" SPECIAL_DBUS_SERVICE);
279 if (symlink("/dev/null", t) < 0)
280 return log_error_errno(errno, "Failed to mask %s: %m", t);
285 int main(int argc, char *argv[]) {
286 const char *path, *type, *units;
289 if (argc > 1 && argc != 4) {
290 log_error("This program takes three or no arguments.");
296 arg_dest_late = argv[3];
299 log_set_target(LOG_TARGET_SAFE);
300 log_parse_environment();
305 if (access("/sys/fs/kdbus/control", F_OK) < 0)
308 r = cg_pid_get_owner_uid(0, NULL);
310 path = "/usr/share/dbus-1/services";
312 units = USER_DATA_UNIT_PATH;
313 } else if (r == -ENOENT) {
314 path = "/usr/share/dbus-1/system-services";
316 units = SYSTEM_DATA_UNIT_PATH;
318 return log_error_errno(r, "Failed to determine whether we are running as user or system instance: %m");
320 r = parse_dbus_fragments(path, type);
322 /* FIXME: One day this should just be pulled in statically from basic.target */
323 q = link_busnames_target(units);
327 q = link_compatibility(units);
331 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;