1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
7 Copyright 2013 Daniel Mack
8 Copyright 2014 Kay Sievers
9 Copyright 2015 David Herrmann
11 systemd is free software; you can redistribute it and/or modify it
12 under the terms of the GNU Lesser General Public License as published by
13 the Free Software Foundation; either version 2.1 of the License, or
14 (at your option) any later version.
16 systemd is distributed in the hope that it will be useful, but
17 WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 Lesser General Public License for more details.
21 You should have received a copy of the GNU Lesser General Public License
22 along with systemd; If not, see <http://www.gnu.org/licenses/>.
25 #include <sys/socket.h>
27 #include <sys/types.h>
33 #include <sys/prctl.h>
41 #include "socket-util.h"
42 #include "sd-daemon.h"
44 #include "bus-internal.h"
45 #include "bus-message.h"
50 #include "capability.h"
51 #include "bus-control.h"
52 #include "smack-util.h"
54 #include "bus-xml-policy.h"
57 #include "synthesize.h"
59 static char *arg_address = NULL;
60 static char **arg_configuration = NULL;
66 static ClientContext *client_context_free(ClientContext *c) {
76 DEFINE_TRIVIAL_CLEANUP_FUNC(ClientContext*, client_context_free);
78 static int client_context_new(ClientContext **out, int fd) {
79 _cleanup_(client_context_freep) ClientContext *c = NULL;
81 c = new0(ClientContext, 1);
92 static void *run_client(void *userdata) {
93 _cleanup_(client_context_freep) ClientContext *c = userdata;
94 _cleanup_(proxy_freep) Proxy *p = NULL;
98 r = proxy_new(&p, c->fd, c->fd, arg_address);
102 /* set comm to "p$PIDu$UID" and suffix with '*' if truncated */
103 r = snprintf(comm, sizeof(comm), "p" PID_FMT "u" UID_FMT, p->local_creds.pid, p->local_creds.uid);
104 if (r >= (ssize_t)sizeof(comm))
105 comm[sizeof(comm) - 2] = '*';
106 (void) prctl(PR_SET_NAME, comm);
108 r = proxy_load_policy(p, arg_configuration);
112 r = proxy_hello_policy(p, getuid());
122 static int loop_clients(int accept_fd) {
126 r = pthread_attr_init(&attr);
128 r = log_error_errno(errno, "Cannot initialize pthread attributes: %m");
132 r = pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
134 r = log_error_errno(errno, "Cannot mark pthread attributes as detached: %m");
143 fd = accept4(accept_fd, NULL, NULL, SOCK_NONBLOCK | SOCK_CLOEXEC);
145 if (errno == EAGAIN || errno == EINTR)
148 r = log_error_errno(errno, "accept4() failed: %m");
152 r = client_context_new(&c, fd);
159 r = pthread_create(&tid, &attr, run_client, c);
161 log_error("Cannot spawn thread: %m");
162 client_context_free(c);
168 pthread_attr_destroy(&attr);
173 static int help(void) {
175 printf("%s [OPTIONS...]\n\n"
176 "DBus proxy server.\n\n"
177 " -h --help Show this help\n"
178 " --version Show package version\n"
179 " --configuration=PATH Configuration file or directory\n"
180 " --machine=MACHINE Connect to specified machine\n"
181 " --address=ADDRESS Connect to the bus specified by ADDRESS\n"
182 " (default: " DEFAULT_SYSTEM_BUS_ADDRESS ")\n",
183 program_invocation_short_name);
188 static int parse_argv(int argc, char *argv[]) {
197 static const struct option options[] = {
198 { "help", no_argument, NULL, 'h' },
199 { "version", no_argument, NULL, ARG_VERSION },
200 { "address", required_argument, NULL, ARG_ADDRESS },
201 { "configuration", required_argument, NULL, ARG_CONFIGURATION },
202 { "machine", required_argument, NULL, ARG_MACHINE },
211 while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
220 puts(PACKAGE_STRING);
221 puts(SYSTEMD_FEATURES);
236 case ARG_CONFIGURATION:
237 r = strv_extend(&arg_configuration, optarg);
243 _cleanup_free_ char *e = NULL;
246 e = bus_address_escape(optarg);
251 a = strjoin("x-machine-kernel:machine=", e, ";x-machine-unix:machine=", e, NULL);
253 a = strjoin("x-machine-unix:machine=", e, NULL);
268 assert_not_reached("Unhandled option");
272 log_error("Too many arguments");
277 arg_address = strdup(DEFAULT_SYSTEM_BUS_ADDRESS);
285 int main(int argc, char *argv[]) {
288 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
289 log_parse_environment();
292 r = parse_argv(argc, argv);
296 r = sd_listen_fds(0);
298 log_error("Illegal number of file descriptors passed");
302 accept_fd = SD_LISTEN_FDS_START;
303 r = fd_nonblock(accept_fd, false);
305 log_error_errno(r, "Cannot mark accept-fd non-blocking: %m");
309 r = loop_clients(accept_fd);
314 "STATUS=Shutting down.");
316 strv_free(arg_configuration);
319 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;