+++ /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_late = "/tmp", *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;
- int r;
-
- assert(path);
- assert(name);
- assert(service || exec);
-
- if (!service) {
- _cleanup_free_ char *a = NULL;
-
- s = strjoin("dbus-", name, ".service", NULL);
- if (!s)
- return log_oom();
-
- a = strjoin(arg_dest_late, "/", s, NULL);
- if (!a)
- return log_oom();
-
- f = fopen(a, "wxe");
- if (!f)
- return log_error_errno(errno, "Failed to create %s: %m", a);
-
- fprintf(f,
- "# Automatically generated by systemd-dbus1-generator\n\n"
- "[Unit]\n"
- "SourcePath=%s\n"
- "Description=DBUS1: %s\n"
- "Documentation=man:systemd-dbus1-generator(8)\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=" DEFAULT_SYSTEM_BUS_ADDRESS "\n");
- else if (streq(type, "session")) {
- char *run;
-
- run = getenv("XDG_RUNTIME_DIR");
- if (!run) {
- log_error("XDG_RUNTIME_DIR not set.");
- return -EINVAL;
- }
-
- fprintf(f, "Environment=DBUS_STARTER_ADDRESS="KERNEL_USER_BUS_ADDRESS_FMT ";" UNIX_USER_BUS_ADDRESS_FMT "\n",
- getuid(), run);
- }
- }
-
- r = fflush_and_check(f);
- if (r < 0)
- return log_error_errno(r, "Failed to write %s: %m", a);
-
- fclose(f);
- f = NULL;
-
- service = s;
- }
-
- b = strjoin(arg_dest_late, "/", name, ".busname", NULL);
- if (!b)
- return log_oom();
-
- f = fopen(b, "wxe");
- if (!f)
- return log_error_errno(errno, "Failed to create %s: %m", b);
-
- fprintf(f,
- "# Automatically generated by systemd-dbus1-generator\n\n"
- "[Unit]\n"
- "SourcePath=%s\n"
- "Description=DBUS1: %s\n"
- "Documentation=man:systemd-dbus1-generator(8)\n\n"
- "[BusName]\n"
- "Name=%s\n"
- "Service=%s\n"
- "AllowWorld=talk\n",
- path,
- name,
- name,
- service);
-
- r = fflush_and_check(f);
- if (r < 0)
- return log_error_errno(r, "Failed to write %s: %m", b);
-
- lnk = strjoin(arg_dest_late, "/" SPECIAL_BUSNAMES_TARGET ".wants/", name, ".busname", NULL);
- if (!lnk)
- return log_oom();
-
- mkdir_parents_label(lnk, 0755);
- if (symlink(b, lnk))
- return log_error_errno(errno, "Failed to create symlink %s: %m", lnk);
-
- 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;
-
- const 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 },
- { },
- };
-
- char *p;
- int r;
-
- assert(path);
- assert(fname);
-
- p = strjoina(path, "/", fname);
- r = config_parse(NULL, p, NULL,
- "D-BUS Service\0",
- config_item_table_lookup, table,
- true, false, true, 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 (streq(name, "org.freedesktop.systemd1")) {
- log_debug("Skipping %s, identified as systemd.", p);
- return 0;
- }
-
- if (service) {
- if (!unit_name_is_valid(service, TEMPLATE_INVALID)) {
- 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 (streq(exec, "/bin/false") || !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(const char *path, const char *type) {
- _cleanup_closedir_ DIR *d = NULL;
- struct dirent *de;
- int r;
-
- assert(path);
- assert(type);
-
- d = opendir(path);
- if (!d) {
- if (errno == -ENOENT)
- return 0;
-
- log_error_errno(errno, "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(path, de->d_name, type);
- if (q < 0)
- r = q;
- }
-
- return r;
-
-fail:
- log_error_errno(errno, "Failed to read D-Bus services directory: %m");
- return -errno;
-}
-
-static int link_busnames_target(const char *units) {
- const char *f, *t;
-
- f = strjoina(units, "/" SPECIAL_BUSNAMES_TARGET);
- t = strjoina(arg_dest, "/" SPECIAL_BASIC_TARGET ".wants/" SPECIAL_BUSNAMES_TARGET);
-
- mkdir_parents_label(t, 0755);
- if (symlink(f, t) < 0)
- return log_error_errno(errno, "Failed to create symlink %s: %m", t);
-
- return 0;
-}
-
-static int link_compatibility(const char *units) {
- const char *f, *t;
-
- f = strjoina(units, "/systemd-bus-proxyd.socket");
- t = strjoina(arg_dest, "/" SPECIAL_DBUS_SOCKET);
- mkdir_parents_label(t, 0755);
- if (symlink(f, t) < 0)
- return log_error_errno(errno, "Failed to create symlink %s: %m", t);
-
- f = strjoina(units, "/systemd-bus-proxyd.socket");
- t = strjoina(arg_dest, "/" SPECIAL_SOCKETS_TARGET ".wants/systemd-bus-proxyd.socket");
- mkdir_parents_label(t, 0755);
- if (symlink(f, t) < 0)
- return log_error_errno(errno, "Failed to create symlink %s: %m", t);
-
- t = strjoina(arg_dest, "/" SPECIAL_DBUS_SERVICE);
- if (symlink("/dev/null", t) < 0)
- return log_error_errno(errno, "Failed to mask %s: %m", t);
-
- return 0;
-}
-
-int main(int argc, char *argv[]) {
- const char *path, *type, *units;
- int r, q;
-
- if (argc > 1 && argc != 4) {
- log_error("This program takes three or no arguments.");
- return EXIT_FAILURE;
- }
-
- if (argc > 1) {
- arg_dest = argv[1];
- arg_dest_late = argv[3];
- }
-
- log_set_target(LOG_TARGET_SAFE);
- log_parse_environment();
- log_open();
-
- umask(0022);
-
- if (access("/sys/fs/kdbus/control", F_OK) < 0)
- return 0;
-
- r = cg_pid_get_owner_uid(0, NULL);
- if (r >= 0) {
- path = "/usr/share/dbus-1/services";
- type = "session";
- units = USER_DATA_UNIT_PATH;
- } else if (r == -ENOENT) {
- path = "/usr/share/dbus-1/system-services";
- type = "system";
- units = SYSTEM_DATA_UNIT_PATH;
- } else
- return log_error_errno(r, "Failed to determine whether we are running as user or system instance: %m");
-
- r = parse_dbus_fragments(path, type);
-
- /* FIXME: One day this should just be pulled in statically from basic.target */
- q = link_busnames_target(units);
- if (q < 0)
- r = q;
-
- q = link_compatibility(units);
- if (q < 0)
- r = q;
-
- return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
-}
~ianmdlvl / elogind.git / blobdiff