./move.sh

1 files changed, 328 insertions, 0 deletions

diff --git a/src/systemd-bus-proxyd/bus-proxyd.c b/src/systemd-bus-proxyd/bus-proxyd.c
new file mode 100644
index 0000000000..17b80c3e9a
--- /dev/null
+++ b/src/systemd-bus-proxyd/bus-proxyd.c
@@ -0,0 +1,328 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+  Copyright 2013 Daniel Mack
+  Copyright 2014 Kay Sievers
+  Copyright 2015 David Herrmann
+
+  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 <errno.h>
+#include <getopt.h>
+#include <pthread.h>
+#include <stddef.h>
+#include <string.h>
+#include <sys/prctl.h>
+#include <sys/socket.h>
+#include <unistd.h>
+
+#include <systemd/sd-daemon.h>
+
+#include "alloc-util.h"
+#include "bus-internal.h"
+#include "bus-xml-policy.h"
+#include "capability-util.h"
+#include "def.h"
+#include "fd-util.h"
+#include "formats-util.h"
+#include "log.h"
+#include "proxy.h"
+#include "string-util.h"
+#include "strv.h"
+#include "user-util.h"
+#include "util.h"
+
+static char *arg_address = NULL;
+static char **arg_configuration = NULL;
+
+typedef struct {
+        int fd;
+        SharedPolicy *policy;
+        uid_t bus_uid;
+} ClientContext;
+
+static ClientContext *client_context_free(ClientContext *c) {
+        if (!c)
+                return NULL;
+
+        safe_close(c->fd);
+        free(c);
+
+        return NULL;
+}
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(ClientContext*, client_context_free);
+
+static int client_context_new(ClientContext **out) {
+        _cleanup_(client_context_freep) ClientContext *c = NULL;
+
+        c = new0(ClientContext, 1);
+        if (!c)
+                return -ENOMEM;
+
+        c->fd = -1;
+
+        *out = c;
+        c = NULL;
+        return 0;
+}
+
+static void *run_client(void *userdata) {
+        _cleanup_(client_context_freep) ClientContext *c = userdata;
+        _cleanup_(proxy_freep) Proxy *p = NULL;
+        char comm[16];
+        int r;
+
+        r = proxy_new(&p, c->fd, c->fd, arg_address);
+        c->fd = -1;
+
+        if (r < 0)
+                goto exit;
+
+        /* set comm to "p$PIDu$UID" and suffix with '*' if truncated */
+        r = snprintf(comm, sizeof(comm), "p" PID_FMT "u" UID_FMT, p->local_creds.pid, p->local_creds.uid);
+        if (r >= (ssize_t)sizeof(comm))
+                comm[sizeof(comm) - 2] = '*';
+        (void) prctl(PR_SET_NAME, comm);
+
+        r = proxy_set_policy(p, c->policy, arg_configuration);
+        if (r < 0)
+                goto exit;
+
+        r = proxy_hello_policy(p, c->bus_uid);
+        if (r < 0)
+                goto exit;
+
+        r = proxy_run(p);
+
+exit:
+        return NULL;
+}
+
+static int loop_clients(int accept_fd, uid_t bus_uid) {
+        _cleanup_(shared_policy_freep) SharedPolicy *sp = NULL;
+        pthread_attr_t attr;
+        int r;
+
+        r = pthread_attr_init(&attr);
+        if (r != 0)
+                return log_error_errno(r, "Cannot initialize pthread attributes: %m");
+
+        r = pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
+        if (r != 0) {
+                r = log_error_errno(r, "Cannot mark pthread attributes as detached: %m");
+                goto finish;
+        }
+
+        r = shared_policy_new(&sp);
+        if (r < 0)
+                goto finish;
+
+        for (;;) {
+                ClientContext *c;
+                pthread_t tid;
+                int fd;
+
+                fd = accept4(accept_fd, NULL, NULL, SOCK_NONBLOCK | SOCK_CLOEXEC);
+                if (fd < 0) {
+                        if (errno == EAGAIN || errno == EINTR)
+                                continue;
+
+                        r = log_error_errno(errno, "accept4() failed: %m");
+                        goto finish;
+                }
+
+                r = client_context_new(&c);
+                if (r < 0) {
+                        log_oom();
+                        close(fd);
+                        continue;
+                }
+
+                c->fd = fd;
+                c->policy = sp;
+                c->bus_uid = bus_uid;
+
+                r = pthread_create(&tid, &attr, run_client, c);
+                if (r != 0) {
+                        log_warning_errno(r, "Cannot spawn thread, ignoring: %m");
+                        client_context_free(c);
+                        continue;
+                }
+        }
+
+finish:
+        pthread_attr_destroy(&attr);
+        return r;
+}
+
+static int help(void) {
+
+        printf("%s [OPTIONS...]\n\n"
+               "DBus proxy server.\n\n"
+               "  -h --help               Show this help\n"
+               "     --version            Show package version\n"
+               "     --configuration=PATH Configuration file or directory\n"
+               "     --machine=MACHINE    Connect to specified machine\n"
+               "     --address=ADDRESS    Connect to the bus specified by ADDRESS\n"
+               "                          (default: " DEFAULT_SYSTEM_BUS_ADDRESS ")\n",
+               program_invocation_short_name);
+
+        return 0;
+}
+
+static int parse_argv(int argc, char *argv[]) {
+
+        enum {
+                ARG_VERSION = 0x100,
+                ARG_ADDRESS,
+                ARG_CONFIGURATION,
+                ARG_MACHINE,
+        };
+
+        static const struct option options[] = {
+                { "help",            no_argument,       NULL, 'h'                 },
+                { "version",         no_argument,       NULL, ARG_VERSION         },
+                { "address",         required_argument, NULL, ARG_ADDRESS         },
+                { "configuration",   required_argument, NULL, ARG_CONFIGURATION   },
+                { "machine",         required_argument, NULL, ARG_MACHINE         },
+                {},
+        };
+
+        int c, r;
+
+        assert(argc >= 0);
+        assert(argv);
+
+        while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
+
+                switch (c) {
+
+                case 'h':
+                        help();
+                        return 0;
+
+                case ARG_VERSION:
+                        return version();
+
+                case ARG_ADDRESS:
+                        r = free_and_strdup(&arg_address, optarg);
+                        if (r < 0)
+                                return log_oom();
+                        break;
+
+                case ARG_CONFIGURATION:
+                        r = strv_extend(&arg_configuration, optarg);
+                        if (r < 0)
+                                return log_oom();
+                        break;
+
+                case ARG_MACHINE: {
+                        _cleanup_free_ char *e = NULL;
+                        char *a;
+
+                        e = bus_address_escape(optarg);
+                        if (!e)
+                                return log_oom();
+
+                        a = strjoin("x-machine-kernel:machine=", e, ";x-machine-unix:machine=", e, NULL);
+                        if (!a)
+                                return log_oom();
+
+                        free(arg_address);
+                        arg_address = a;
+
+                        break;
+                }
+
+                case '?':
+                        return -EINVAL;
+
+                default:
+                        assert_not_reached("Unhandled option");
+                }
+
+        if (argc > optind) {
+                log_error("Too many arguments");
+                return -EINVAL;
+        }
+
+        if (!arg_address) {
+                arg_address = strdup(DEFAULT_SYSTEM_BUS_ADDRESS);
+                if (!arg_address)
+                        return log_oom();
+        }
+
+        return 1;
+}
+
+int main(int argc, char *argv[]) {
+        int r, accept_fd;
+        uid_t uid, bus_uid;
+        gid_t gid;
+
+        log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
+        log_parse_environment();
+        log_open();
+
+        bus_uid = getuid();
+
+        if (geteuid() == 0) {
+                const char *user = "systemd-bus-proxy";
+
+                r = get_user_creds(&user, &uid, &gid, NULL, NULL);
+                if (r < 0) {
+                        log_error_errno(r, "Cannot resolve user name %s: %m", user);
+                        goto finish;
+                }
+
+                r = drop_privileges(uid, gid, 1ULL << CAP_IPC_OWNER);
+                if (r < 0) {
+                        log_error_errno(r, "Cannot drop privileges: %m");
+                        goto finish;
+                }
+        }
+
+        r = parse_argv(argc, argv);
+        if (r <= 0)
+                goto finish;
+
+        r = sd_listen_fds(0);
+        if (r != 1) {
+                log_error("Illegal number of file descriptors passed");
+                goto finish;
+        }
+
+        accept_fd = SD_LISTEN_FDS_START;
+
+        r = fd_nonblock(accept_fd, false);
+        if (r < 0) {
+                log_error_errno(r, "Cannot mark accept-fd non-blocking: %m");
+                goto finish;
+        }
+
+        r = loop_clients(accept_fd, bus_uid);
+
+finish:
+        sd_notify(false,
+                  "STOPPING=1\n"
+                  "STATUS=Shutting down.");
+
+        strv_free(arg_configuration);
+        free(arg_address);
+
+        return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+}