--- /dev/null
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2013 Lennart Poettering
+
+ 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 "util.h"
+#include "conf-parser.h"
+#include "special.h"
+#include "mkdir.h"
+#include "bus-util.h"
+#include "bus-internal.h"
+#include "unit-name.h"
+#include "cgroup-util.h"
+
+static const char *arg_dest = "/tmp";
+
+static int create_dbus_files(
+ const char *path,
+ const char *name,
+ const char *service,
+ const char *exec,
+ const char *user,
+ const char *type) {
+
+ _cleanup_free_ char *b = NULL, *s = NULL, *lnk = NULL;
+ _cleanup_fclose_ FILE *f = NULL;
+
+ assert(path);
+ assert(name);
+
+ if (!service) {
+ _cleanup_free_ char *a = NULL;
+
+ s = strjoin("dbus-", name, ".service", NULL);
+ if (!s)
+ return log_oom();
+
+ a = strjoin(arg_dest, "/", s, NULL);
+ if (!a)
+ return log_oom();
+
+ f = fopen(a, "wxe");
+ if (!f) {
+ log_error("Failed to create %s: %m", a);
+ return -errno;
+ }
+
+ fprintf(f,
+ "# Automatically generated by systemd-dbus1-generator\n\n"
+ "[Unit]\n"
+ "Source=%s\n"
+ "Description=DBUS1: %s\n\n"
+ "[Service]\n"
+ "ExecStart=%s\n"
+ "Type=dbus\n"
+ "BusName=%s\n",
+ path,
+ name,
+ exec,
+ name);
+
+ if (user)
+ fprintf(f, "User=%s\n", user);
+
+
+ if (type) {
+ fprintf(f, "Environment=DBUS_STARTER_BUS_TYPE=%s\n", type);
+
+ if (streq(type, "system"))
+ fprintf(f, "Environment=DBUS_STARTER_ADDRESS=kernel:/dev/kdbus/0-system\n");
+ else if (streq(type, "session"))
+ fprintf(f, "Environment=DBUS_STARTER_ADDRESS=kernel:/dev/kdbus/%lu-user\n", (unsigned long) getuid());
+ }
+
+ fflush(f);
+ if (ferror(f)) {
+ log_error("Failed to write %s: %m", a);
+ return -errno;
+ }
+
+ service = s;
+ }
+
+ b = strjoin(arg_dest, "/", name, ".busname", NULL);
+ if (!b)
+ return log_oom();
+
+ f = fopen(b, "wxe");
+ if (!f) {
+ log_error("Failed to create %s: %m", b);
+ return -errno;
+ }
+
+ fprintf(f,
+ "# Automatically generated by systemd-dbus1-generator\n\n"
+ "[Unit]\n"
+ "Source=%s\n"
+ "Description=DBUS1: %s\n\n"
+ "[BusName]\n"
+ "Name=%s\n"
+ "Service=%s\n",
+ path,
+ name,
+ name,
+ service);
+
+ fflush(f);
+ if (ferror(f)) {
+ log_error("Failed to write %s: %m", b);
+ return -errno;
+ }
+
+ lnk = strjoin(arg_dest, "/" SPECIAL_BUSNAMES_TARGET ".wants/", name, ".busname", NULL);
+ if (!lnk)
+ return log_oom();
+
+ mkdir_parents_label(lnk, 0755);
+ if (symlink(b, lnk)) {
+ log_error("Failed to create symlinks %s: %m", lnk);
+ return -errno;
+ }
+
+ return 0;
+}
+
+static int add_dbus(const char *path, const char *fname, const char *type) {
+ _cleanup_free_ char *name = NULL, *exec = NULL, *user = NULL, *service = NULL;
+
+ ConfigTableItem table[] = {
+ { "D-BUS Service", "Name", config_parse_string, 0, &name },
+ { "D-BUS Service", "Exec", config_parse_string, 0, &exec },
+ { "D-BUS Service", "User", config_parse_string, 0, &user },
+ { "D-BUS Service", "SystemdService", config_parse_string, 0, &service },
+ };
+
+ _cleanup_fclose_ FILE *f = NULL;
+ _cleanup_free_ char *p = NULL;
+ int r;
+
+ assert(path);
+ assert(fname);
+
+ p = strjoin(path, "/", fname, NULL);
+ if (!p)
+ return log_oom();
+
+ f = fopen(p, "re");
+ if (!f) {
+ if (errno == -ENOENT)
+ return 0;
+
+ log_error("Failed to read %s: %m", p);
+ return -errno;
+ }
+
+ r = config_parse(NULL, p, f, "D-BUS Service\0", config_item_table_lookup, table, true, false, NULL);
+ if (r < 0)
+ return r;
+
+ if (!name) {
+ log_warning("Activation file %s lacks name setting, ignoring.", p);
+ return 0;
+ }
+
+ if (!service_name_is_valid(name)) {
+ log_warning("Bus service name %s is not valid, ignoring.", name);
+ return 0;
+ }
+
+ if (service) {
+ if (!unit_name_is_valid(service, false)) {
+ log_warning("Unit name %s is not valid, ignoring.", service);
+ return 0;
+ }
+ if (!endswith(service, ".service")) {
+ log_warning("Bus names can only activate services, ignoring %s.", p);
+ return 0;
+ }
+ } else {
+ if (!exec) {
+ log_warning("Neither service name nor binary path specified, ignoring %s.", p);
+ return 0;
+ }
+
+ if (exec[0] != '/') {
+ log_warning("Exec= in %s does not start with an absolute path, ignoring.", p);
+ return 0;
+ }
+ }
+
+ return create_dbus_files(p, name, service, exec, user, type);
+}
+
+static int parse_dbus_fragments(void) {
+ _cleanup_closedir_ DIR *d = NULL;
+ struct dirent *de;
+ const char *p, *type;
+ int r;
+
+ r = cg_pid_get_owner_uid(0, NULL);
+ if (r >= 0) {
+ p = "/usr/share/dbus-1/services";
+ type = "session";
+ } else if (r == -ENOENT) {
+ p = "/usr/share/dbus-1/system-services";
+ type = "systemd";
+ } else if (r < 0) {
+ log_error("Failed to determine whether we are running as user or system instance: %s", strerror(-r));
+ return r;
+ }
+
+ d = opendir(p);
+ if (!d) {
+ if (errno == -ENOENT)
+ return 0;
+
+ log_error("Failed to enumerate D-Bus activated services: %m");
+ return -errno;
+ }
+
+ r = 0;
+ FOREACH_DIRENT(de, d, goto fail) {
+ int q;
+
+ if (!endswith(de->d_name, ".service"))
+ continue;
+
+ q = add_dbus(p, de->d_name, type);
+ if (q < 0)
+ r = q;
+ }
+
+ return r;
+
+fail:
+ log_error("Failed to read D-Bus services directory: %m");
+ return -errno;
+}
+
+int main(int argc, char *argv[]) {
+ int r;
+
+ if (argc > 1 && argc != 4) {
+ log_error("This program takes three or no arguments.");
+ return EXIT_FAILURE;
+ }
+
+ if (argc > 1)
+ arg_dest = argv[3];
+
+ log_set_target(LOG_TARGET_SAFE);
+ log_parse_environment();
+ log_open();
+
+ umask(0022);
+
+ if (access("/dev/kdbus/control", F_OK) < 0)
+ return 0;
+
+ r = parse_dbus_fragments();
+
+ return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+}
~ianmdlvl / elogind.git / commitdiff