25300b5a1f
As it turns out machine_name_is_valid() does the exact same thing as hostname_is_valid() these days, as it just invoked that and checked the name length was < 64. However, hostname_is_valid() checks the length against HOST_NAME_MAX anyway (which is 64 on Linux), hence any additional check is redundant. We hence replace machine_name_is_valid() by a macro that simply maps it to hostname_is_valid() but sets the allow_trailing_dot parameter to false. We also move this this call to hostname-util.h, to the same place as the hostname_is_valid() declaration.
3582 lines
101 KiB
C
3582 lines
101 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2013 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <endian.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <netdb.h>
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#include <poll.h>
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#include <sys/mman.h>
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#include <pthread.h>
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#include "util.h"
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#include "macro.h"
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#include "strv.h"
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#include "missing.h"
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#include "def.h"
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#include "cgroup-util.h"
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#include "hostname-util.h"
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#include "bus-label.h"
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#include "sd-bus.h"
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#include "bus-internal.h"
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#include "bus-message.h"
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#include "bus-type.h"
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#include "bus-socket.h"
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#include "bus-kernel.h"
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#include "bus-control.h"
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#include "bus-objects.h"
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#include "bus-container.h"
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#include "bus-protocol.h"
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#include "bus-track.h"
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#include "bus-slot.h"
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#define log_debug_bus_message(m) \
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do { \
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sd_bus_message *_mm = (m); \
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log_debug("Got message type=%s sender=%s destination=%s object=%s interface=%s member=%s cookie=%" PRIu64 " reply_cookie=%" PRIu64 " error=%s", \
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bus_message_type_to_string(_mm->header->type), \
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strna(sd_bus_message_get_sender(_mm)), \
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strna(sd_bus_message_get_destination(_mm)), \
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strna(sd_bus_message_get_path(_mm)), \
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strna(sd_bus_message_get_interface(_mm)), \
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strna(sd_bus_message_get_member(_mm)), \
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BUS_MESSAGE_COOKIE(_mm), \
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_mm->reply_cookie, \
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strna(_mm->error.message)); \
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} while (false)
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static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec);
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static int attach_io_events(sd_bus *b);
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static void detach_io_events(sd_bus *b);
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static void bus_close_fds(sd_bus *b) {
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assert(b);
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detach_io_events(b);
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if (b->input_fd != b->output_fd)
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safe_close(b->output_fd);
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b->output_fd = b->input_fd = safe_close(b->input_fd);
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}
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static void bus_reset_queues(sd_bus *b) {
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assert(b);
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while (b->rqueue_size > 0)
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sd_bus_message_unref(b->rqueue[--b->rqueue_size]);
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b->rqueue = mfree(b->rqueue);
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b->rqueue_allocated = 0;
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while (b->wqueue_size > 0)
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sd_bus_message_unref(b->wqueue[--b->wqueue_size]);
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b->wqueue = mfree(b->wqueue);
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b->wqueue_allocated = 0;
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}
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static void bus_free(sd_bus *b) {
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sd_bus_slot *s;
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assert(b);
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assert(!b->track_queue);
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b->state = BUS_CLOSED;
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sd_bus_detach_event(b);
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while ((s = b->slots)) {
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/* At this point only floating slots can still be
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* around, because the non-floating ones keep a
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* reference to the bus, and we thus couldn't be
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* destructing right now... We forcibly disconnect the
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* slots here, so that they still can be referenced by
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* apps, but are dead. */
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assert(s->floating);
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bus_slot_disconnect(s);
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sd_bus_slot_unref(s);
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}
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if (b->default_bus_ptr)
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*b->default_bus_ptr = NULL;
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bus_close_fds(b);
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if (b->kdbus_buffer)
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munmap(b->kdbus_buffer, KDBUS_POOL_SIZE);
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free(b->label);
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free(b->rbuffer);
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free(b->unique_name);
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free(b->auth_buffer);
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free(b->address);
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free(b->kernel);
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free(b->machine);
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free(b->fake_label);
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free(b->cgroup_root);
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free(b->description);
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free(b->exec_path);
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strv_free(b->exec_argv);
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close_many(b->fds, b->n_fds);
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free(b->fds);
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bus_reset_queues(b);
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ordered_hashmap_free_free(b->reply_callbacks);
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prioq_free(b->reply_callbacks_prioq);
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assert(b->match_callbacks.type == BUS_MATCH_ROOT);
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bus_match_free(&b->match_callbacks);
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hashmap_free_free(b->vtable_methods);
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hashmap_free_free(b->vtable_properties);
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assert(hashmap_isempty(b->nodes));
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hashmap_free(b->nodes);
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bus_kernel_flush_memfd(b);
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assert_se(pthread_mutex_destroy(&b->memfd_cache_mutex) == 0);
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free(b);
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}
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_public_ int sd_bus_new(sd_bus **ret) {
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sd_bus *r;
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assert_return(ret, -EINVAL);
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r = new0(sd_bus, 1);
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if (!r)
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return -ENOMEM;
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r->n_ref = REFCNT_INIT;
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r->input_fd = r->output_fd = -1;
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r->message_version = 1;
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r->creds_mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME;
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r->hello_flags |= KDBUS_HELLO_ACCEPT_FD;
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r->attach_flags |= KDBUS_ATTACH_NAMES;
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r->original_pid = getpid();
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assert_se(pthread_mutex_init(&r->memfd_cache_mutex, NULL) == 0);
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/* We guarantee that wqueue always has space for at least one
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* entry */
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if (!GREEDY_REALLOC(r->wqueue, r->wqueue_allocated, 1)) {
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free(r);
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return -ENOMEM;
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}
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*ret = r;
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return 0;
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}
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_public_ int sd_bus_set_address(sd_bus *bus, const char *address) {
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char *a;
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assert_return(bus, -EINVAL);
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assert_return(bus->state == BUS_UNSET, -EPERM);
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assert_return(address, -EINVAL);
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assert_return(!bus_pid_changed(bus), -ECHILD);
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a = strdup(address);
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if (!a)
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return -ENOMEM;
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free(bus->address);
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bus->address = a;
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return 0;
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}
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_public_ int sd_bus_set_fd(sd_bus *bus, int input_fd, int output_fd) {
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assert_return(bus, -EINVAL);
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assert_return(bus->state == BUS_UNSET, -EPERM);
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assert_return(input_fd >= 0, -EBADF);
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assert_return(output_fd >= 0, -EBADF);
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assert_return(!bus_pid_changed(bus), -ECHILD);
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bus->input_fd = input_fd;
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bus->output_fd = output_fd;
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return 0;
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}
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_public_ int sd_bus_set_exec(sd_bus *bus, const char *path, char *const argv[]) {
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char *p, **a;
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assert_return(bus, -EINVAL);
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assert_return(bus->state == BUS_UNSET, -EPERM);
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assert_return(path, -EINVAL);
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assert_return(!strv_isempty(argv), -EINVAL);
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assert_return(!bus_pid_changed(bus), -ECHILD);
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p = strdup(path);
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if (!p)
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return -ENOMEM;
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a = strv_copy(argv);
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if (!a) {
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free(p);
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return -ENOMEM;
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}
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free(bus->exec_path);
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strv_free(bus->exec_argv);
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bus->exec_path = p;
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bus->exec_argv = a;
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return 0;
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}
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_public_ int sd_bus_set_bus_client(sd_bus *bus, int b) {
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assert_return(bus, -EINVAL);
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assert_return(bus->state == BUS_UNSET, -EPERM);
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assert_return(!bus_pid_changed(bus), -ECHILD);
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bus->bus_client = !!b;
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return 0;
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}
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_public_ int sd_bus_set_monitor(sd_bus *bus, int b) {
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assert_return(bus, -EINVAL);
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assert_return(bus->state == BUS_UNSET, -EPERM);
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assert_return(!bus_pid_changed(bus), -ECHILD);
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SET_FLAG(bus->hello_flags, KDBUS_HELLO_MONITOR, b);
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return 0;
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}
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_public_ int sd_bus_negotiate_fds(sd_bus *bus, int b) {
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assert_return(bus, -EINVAL);
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assert_return(bus->state == BUS_UNSET, -EPERM);
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assert_return(!bus_pid_changed(bus), -ECHILD);
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SET_FLAG(bus->hello_flags, KDBUS_HELLO_ACCEPT_FD, b);
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return 0;
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}
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_public_ int sd_bus_negotiate_timestamp(sd_bus *bus, int b) {
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uint64_t new_flags;
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assert_return(bus, -EINVAL);
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assert_return(!IN_SET(bus->state, BUS_CLOSING, BUS_CLOSED), -EPERM);
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assert_return(!bus_pid_changed(bus), -ECHILD);
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new_flags = bus->attach_flags;
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SET_FLAG(new_flags, KDBUS_ATTACH_TIMESTAMP, b);
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if (bus->attach_flags == new_flags)
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return 0;
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bus->attach_flags = new_flags;
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if (bus->state != BUS_UNSET && bus->is_kernel)
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bus_kernel_realize_attach_flags(bus);
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return 0;
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}
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_public_ int sd_bus_negotiate_creds(sd_bus *bus, int b, uint64_t mask) {
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uint64_t new_flags;
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assert_return(bus, -EINVAL);
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assert_return(mask <= _SD_BUS_CREDS_ALL, -EINVAL);
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assert_return(!IN_SET(bus->state, BUS_CLOSING, BUS_CLOSED), -EPERM);
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assert_return(!bus_pid_changed(bus), -ECHILD);
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if (b)
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bus->creds_mask |= mask;
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else
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bus->creds_mask &= ~mask;
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/* The well knowns we need unconditionally, so that matches can work */
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bus->creds_mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME;
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/* Make sure we don't lose the timestamp flag */
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new_flags = (bus->attach_flags & KDBUS_ATTACH_TIMESTAMP) | attach_flags_to_kdbus(bus->creds_mask);
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if (bus->attach_flags == new_flags)
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return 0;
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bus->attach_flags = new_flags;
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if (bus->state != BUS_UNSET && bus->is_kernel)
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bus_kernel_realize_attach_flags(bus);
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return 0;
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}
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_public_ int sd_bus_set_server(sd_bus *bus, int b, sd_id128_t server_id) {
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assert_return(bus, -EINVAL);
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assert_return(b || sd_id128_equal(server_id, SD_ID128_NULL), -EINVAL);
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assert_return(bus->state == BUS_UNSET, -EPERM);
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assert_return(!bus_pid_changed(bus), -ECHILD);
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bus->is_server = !!b;
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bus->server_id = server_id;
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return 0;
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}
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_public_ int sd_bus_set_anonymous(sd_bus *bus, int b) {
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assert_return(bus, -EINVAL);
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assert_return(bus->state == BUS_UNSET, -EPERM);
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assert_return(!bus_pid_changed(bus), -ECHILD);
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bus->anonymous_auth = !!b;
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return 0;
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}
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_public_ int sd_bus_set_trusted(sd_bus *bus, int b) {
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assert_return(bus, -EINVAL);
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assert_return(bus->state == BUS_UNSET, -EPERM);
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assert_return(!bus_pid_changed(bus), -ECHILD);
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bus->trusted = !!b;
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return 0;
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}
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_public_ int sd_bus_set_description(sd_bus *bus, const char *description) {
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assert_return(bus, -EINVAL);
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assert_return(bus->state == BUS_UNSET, -EPERM);
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assert_return(!bus_pid_changed(bus), -ECHILD);
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return free_and_strdup(&bus->description, description);
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}
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_public_ int sd_bus_set_allow_interactive_authorization(sd_bus *bus, int b) {
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assert_return(bus, -EINVAL);
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assert_return(!bus_pid_changed(bus), -ECHILD);
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bus->allow_interactive_authorization = !!b;
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return 0;
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}
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_public_ int sd_bus_get_allow_interactive_authorization(sd_bus *bus) {
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assert_return(bus, -EINVAL);
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assert_return(!bus_pid_changed(bus), -ECHILD);
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return bus->allow_interactive_authorization;
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}
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static int hello_callback(sd_bus_message *reply, void *userdata, sd_bus_error *error) {
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const char *s;
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sd_bus *bus;
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int r;
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assert(reply);
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bus = reply->bus;
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assert(bus);
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assert(bus->state == BUS_HELLO || bus->state == BUS_CLOSING);
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r = sd_bus_message_get_errno(reply);
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if (r > 0)
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return -r;
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r = sd_bus_message_read(reply, "s", &s);
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if (r < 0)
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return r;
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|
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if (!service_name_is_valid(s) || s[0] != ':')
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return -EBADMSG;
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|
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bus->unique_name = strdup(s);
|
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if (!bus->unique_name)
|
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return -ENOMEM;
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|
|
if (bus->state == BUS_HELLO)
|
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bus->state = BUS_RUNNING;
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|
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return 1;
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}
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|
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static int bus_send_hello(sd_bus *bus) {
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_cleanup_bus_message_unref_ sd_bus_message *m = NULL;
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int r;
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|
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assert(bus);
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|
|
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if (!bus->bus_client || bus->is_kernel)
|
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return 0;
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|
|
r = sd_bus_message_new_method_call(
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bus,
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&m,
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"org.freedesktop.DBus",
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"/org/freedesktop/DBus",
|
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"org.freedesktop.DBus",
|
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"Hello");
|
|
if (r < 0)
|
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return r;
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|
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return sd_bus_call_async(bus, NULL, m, hello_callback, NULL, 0);
|
|
}
|
|
|
|
int bus_start_running(sd_bus *bus) {
|
|
assert(bus);
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|
|
|
if (bus->bus_client && !bus->is_kernel) {
|
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bus->state = BUS_HELLO;
|
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return 1;
|
|
}
|
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|
|
bus->state = BUS_RUNNING;
|
|
return 1;
|
|
}
|
|
|
|
static int parse_address_key(const char **p, const char *key, char **value) {
|
|
size_t l, n = 0, allocated = 0;
|
|
const char *a;
|
|
char *r = NULL;
|
|
|
|
assert(p);
|
|
assert(*p);
|
|
assert(value);
|
|
|
|
if (key) {
|
|
l = strlen(key);
|
|
if (strncmp(*p, key, l) != 0)
|
|
return 0;
|
|
|
|
if ((*p)[l] != '=')
|
|
return 0;
|
|
|
|
if (*value)
|
|
return -EINVAL;
|
|
|
|
a = *p + l + 1;
|
|
} else
|
|
a = *p;
|
|
|
|
while (*a != ';' && *a != ',' && *a != 0) {
|
|
char c;
|
|
|
|
if (*a == '%') {
|
|
int x, y;
|
|
|
|
x = unhexchar(a[1]);
|
|
if (x < 0) {
|
|
free(r);
|
|
return x;
|
|
}
|
|
|
|
y = unhexchar(a[2]);
|
|
if (y < 0) {
|
|
free(r);
|
|
return y;
|
|
}
|
|
|
|
c = (char) ((x << 4) | y);
|
|
a += 3;
|
|
} else {
|
|
c = *a;
|
|
a++;
|
|
}
|
|
|
|
if (!GREEDY_REALLOC(r, allocated, n + 2))
|
|
return -ENOMEM;
|
|
|
|
r[n++] = c;
|
|
}
|
|
|
|
if (!r) {
|
|
r = strdup("");
|
|
if (!r)
|
|
return -ENOMEM;
|
|
} else
|
|
r[n] = 0;
|
|
|
|
if (*a == ',')
|
|
a++;
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|
|
*p = a;
|
|
|
|
free(*value);
|
|
*value = r;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static void skip_address_key(const char **p) {
|
|
assert(p);
|
|
assert(*p);
|
|
|
|
*p += strcspn(*p, ",");
|
|
|
|
if (**p == ',')
|
|
(*p) ++;
|
|
}
|
|
|
|
static int parse_unix_address(sd_bus *b, const char **p, char **guid) {
|
|
_cleanup_free_ char *path = NULL, *abstract = NULL;
|
|
size_t l;
|
|
int r;
|
|
|
|
assert(b);
|
|
assert(p);
|
|
assert(*p);
|
|
assert(guid);
|
|
|
|
while (**p != 0 && **p != ';') {
|
|
r = parse_address_key(p, "guid", guid);
|
|
if (r < 0)
|
|
return r;
|
|
else if (r > 0)
|
|
continue;
|
|
|
|
r = parse_address_key(p, "path", &path);
|
|
if (r < 0)
|
|
return r;
|
|
else if (r > 0)
|
|
continue;
|
|
|
|
r = parse_address_key(p, "abstract", &abstract);
|
|
if (r < 0)
|
|
return r;
|
|
else if (r > 0)
|
|
continue;
|
|
|
|
skip_address_key(p);
|
|
}
|
|
|
|
if (!path && !abstract)
|
|
return -EINVAL;
|
|
|
|
if (path && abstract)
|
|
return -EINVAL;
|
|
|
|
if (path) {
|
|
l = strlen(path);
|
|
if (l > sizeof(b->sockaddr.un.sun_path))
|
|
return -E2BIG;
|
|
|
|
b->sockaddr.un.sun_family = AF_UNIX;
|
|
strncpy(b->sockaddr.un.sun_path, path, sizeof(b->sockaddr.un.sun_path));
|
|
b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l;
|
|
} else if (abstract) {
|
|
l = strlen(abstract);
|
|
if (l > sizeof(b->sockaddr.un.sun_path) - 1)
|
|
return -E2BIG;
|
|
|
|
b->sockaddr.un.sun_family = AF_UNIX;
|
|
b->sockaddr.un.sun_path[0] = 0;
|
|
strncpy(b->sockaddr.un.sun_path+1, abstract, sizeof(b->sockaddr.un.sun_path)-1);
|
|
b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + 1 + l;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int parse_tcp_address(sd_bus *b, const char **p, char **guid) {
|
|
_cleanup_free_ char *host = NULL, *port = NULL, *family = NULL;
|
|
int r;
|
|
struct addrinfo *result, hints = {
|
|
.ai_socktype = SOCK_STREAM,
|
|
.ai_flags = AI_ADDRCONFIG,
|
|
};
|
|
|
|
assert(b);
|
|
assert(p);
|
|
assert(*p);
|
|
assert(guid);
|
|
|
|
while (**p != 0 && **p != ';') {
|
|
r = parse_address_key(p, "guid", guid);
|
|
if (r < 0)
|
|
return r;
|
|
else if (r > 0)
|
|
continue;
|
|
|
|
r = parse_address_key(p, "host", &host);
|
|
if (r < 0)
|
|
return r;
|
|
else if (r > 0)
|
|
continue;
|
|
|
|
r = parse_address_key(p, "port", &port);
|
|
if (r < 0)
|
|
return r;
|
|
else if (r > 0)
|
|
continue;
|
|
|
|
r = parse_address_key(p, "family", &family);
|
|
if (r < 0)
|
|
return r;
|
|
else if (r > 0)
|
|
continue;
|
|
|
|
skip_address_key(p);
|
|
}
|
|
|
|
if (!host || !port)
|
|
return -EINVAL;
|
|
|
|
if (family) {
|
|
if (streq(family, "ipv4"))
|
|
hints.ai_family = AF_INET;
|
|
else if (streq(family, "ipv6"))
|
|
hints.ai_family = AF_INET6;
|
|
else
|
|
return -EINVAL;
|
|
}
|
|
|
|
r = getaddrinfo(host, port, &hints, &result);
|
|
if (r == EAI_SYSTEM)
|
|
return -errno;
|
|
else if (r != 0)
|
|
return -EADDRNOTAVAIL;
|
|
|
|
memcpy(&b->sockaddr, result->ai_addr, result->ai_addrlen);
|
|
b->sockaddr_size = result->ai_addrlen;
|
|
|
|
freeaddrinfo(result);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int parse_exec_address(sd_bus *b, const char **p, char **guid) {
|
|
char *path = NULL;
|
|
unsigned n_argv = 0, j;
|
|
char **argv = NULL;
|
|
size_t allocated = 0;
|
|
int r;
|
|
|
|
assert(b);
|
|
assert(p);
|
|
assert(*p);
|
|
assert(guid);
|
|
|
|
while (**p != 0 && **p != ';') {
|
|
r = parse_address_key(p, "guid", guid);
|
|
if (r < 0)
|
|
goto fail;
|
|
else if (r > 0)
|
|
continue;
|
|
|
|
r = parse_address_key(p, "path", &path);
|
|
if (r < 0)
|
|
goto fail;
|
|
else if (r > 0)
|
|
continue;
|
|
|
|
if (startswith(*p, "argv")) {
|
|
unsigned ul;
|
|
|
|
errno = 0;
|
|
ul = strtoul(*p + 4, (char**) p, 10);
|
|
if (errno > 0 || **p != '=' || ul > 256) {
|
|
r = -EINVAL;
|
|
goto fail;
|
|
}
|
|
|
|
(*p) ++;
|
|
|
|
if (ul >= n_argv) {
|
|
if (!GREEDY_REALLOC0(argv, allocated, ul + 2)) {
|
|
r = -ENOMEM;
|
|
goto fail;
|
|
}
|
|
|
|
n_argv = ul + 1;
|
|
}
|
|
|
|
r = parse_address_key(p, NULL, argv + ul);
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
continue;
|
|
}
|
|
|
|
skip_address_key(p);
|
|
}
|
|
|
|
if (!path) {
|
|
r = -EINVAL;
|
|
goto fail;
|
|
}
|
|
|
|
/* Make sure there are no holes in the array, with the
|
|
* exception of argv[0] */
|
|
for (j = 1; j < n_argv; j++)
|
|
if (!argv[j]) {
|
|
r = -EINVAL;
|
|
goto fail;
|
|
}
|
|
|
|
if (argv && argv[0] == NULL) {
|
|
argv[0] = strdup(path);
|
|
if (!argv[0]) {
|
|
r = -ENOMEM;
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
b->exec_path = path;
|
|
b->exec_argv = argv;
|
|
return 0;
|
|
|
|
fail:
|
|
for (j = 0; j < n_argv; j++)
|
|
free(argv[j]);
|
|
|
|
free(argv);
|
|
free(path);
|
|
return r;
|
|
}
|
|
|
|
static int parse_kernel_address(sd_bus *b, const char **p, char **guid) {
|
|
_cleanup_free_ char *path = NULL;
|
|
int r;
|
|
|
|
assert(b);
|
|
assert(p);
|
|
assert(*p);
|
|
assert(guid);
|
|
|
|
while (**p != 0 && **p != ';') {
|
|
r = parse_address_key(p, "guid", guid);
|
|
if (r < 0)
|
|
return r;
|
|
else if (r > 0)
|
|
continue;
|
|
|
|
r = parse_address_key(p, "path", &path);
|
|
if (r < 0)
|
|
return r;
|
|
else if (r > 0)
|
|
continue;
|
|
|
|
skip_address_key(p);
|
|
}
|
|
|
|
if (!path)
|
|
return -EINVAL;
|
|
|
|
free(b->kernel);
|
|
b->kernel = path;
|
|
path = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int parse_container_unix_address(sd_bus *b, const char **p, char **guid) {
|
|
_cleanup_free_ char *machine = NULL, *pid = NULL;
|
|
int r;
|
|
|
|
assert(b);
|
|
assert(p);
|
|
assert(*p);
|
|
assert(guid);
|
|
|
|
while (**p != 0 && **p != ';') {
|
|
r = parse_address_key(p, "guid", guid);
|
|
if (r < 0)
|
|
return r;
|
|
else if (r > 0)
|
|
continue;
|
|
|
|
r = parse_address_key(p, "machine", &machine);
|
|
if (r < 0)
|
|
return r;
|
|
else if (r > 0)
|
|
continue;
|
|
|
|
r = parse_address_key(p, "pid", &pid);
|
|
if (r < 0)
|
|
return r;
|
|
else if (r > 0)
|
|
continue;
|
|
|
|
skip_address_key(p);
|
|
}
|
|
|
|
if (!machine == !pid)
|
|
return -EINVAL;
|
|
|
|
if (machine) {
|
|
if (!machine_name_is_valid(machine))
|
|
return -EINVAL;
|
|
|
|
free(b->machine);
|
|
b->machine = machine;
|
|
machine = NULL;
|
|
} else {
|
|
free(b->machine);
|
|
b->machine = NULL;
|
|
}
|
|
|
|
if (pid) {
|
|
r = parse_pid(pid, &b->nspid);
|
|
if (r < 0)
|
|
return r;
|
|
} else
|
|
b->nspid = 0;
|
|
|
|
b->sockaddr.un.sun_family = AF_UNIX;
|
|
strncpy(b->sockaddr.un.sun_path, "/var/run/dbus/system_bus_socket", sizeof(b->sockaddr.un.sun_path));
|
|
b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + strlen("/var/run/dbus/system_bus_socket");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int parse_container_kernel_address(sd_bus *b, const char **p, char **guid) {
|
|
_cleanup_free_ char *machine = NULL, *pid = NULL;
|
|
int r;
|
|
|
|
assert(b);
|
|
assert(p);
|
|
assert(*p);
|
|
assert(guid);
|
|
|
|
while (**p != 0 && **p != ';') {
|
|
r = parse_address_key(p, "guid", guid);
|
|
if (r < 0)
|
|
return r;
|
|
else if (r > 0)
|
|
continue;
|
|
|
|
r = parse_address_key(p, "machine", &machine);
|
|
if (r < 0)
|
|
return r;
|
|
else if (r > 0)
|
|
continue;
|
|
|
|
r = parse_address_key(p, "pid", &pid);
|
|
if (r < 0)
|
|
return r;
|
|
else if (r > 0)
|
|
continue;
|
|
|
|
skip_address_key(p);
|
|
}
|
|
|
|
if (!machine == !pid)
|
|
return -EINVAL;
|
|
|
|
if (machine) {
|
|
if (!machine_name_is_valid(machine))
|
|
return -EINVAL;
|
|
|
|
free(b->machine);
|
|
b->machine = machine;
|
|
machine = NULL;
|
|
} else {
|
|
free(b->machine);
|
|
b->machine = NULL;
|
|
}
|
|
|
|
if (pid) {
|
|
r = parse_pid(pid, &b->nspid);
|
|
if (r < 0)
|
|
return r;
|
|
} else
|
|
b->nspid = 0;
|
|
|
|
r = free_and_strdup(&b->kernel, "/sys/fs/kdbus/0-system/bus");
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void bus_reset_parsed_address(sd_bus *b) {
|
|
assert(b);
|
|
|
|
zero(b->sockaddr);
|
|
b->sockaddr_size = 0;
|
|
b->exec_argv = strv_free(b->exec_argv);
|
|
b->exec_path = mfree(b->exec_path);
|
|
b->server_id = SD_ID128_NULL;
|
|
b->kernel = mfree(b->kernel);
|
|
b->machine = mfree(b->machine);
|
|
b->nspid = 0;
|
|
}
|
|
|
|
static int bus_parse_next_address(sd_bus *b) {
|
|
_cleanup_free_ char *guid = NULL;
|
|
const char *a;
|
|
int r;
|
|
|
|
assert(b);
|
|
|
|
if (!b->address)
|
|
return 0;
|
|
if (b->address[b->address_index] == 0)
|
|
return 0;
|
|
|
|
bus_reset_parsed_address(b);
|
|
|
|
a = b->address + b->address_index;
|
|
|
|
while (*a != 0) {
|
|
|
|
if (*a == ';') {
|
|
a++;
|
|
continue;
|
|
}
|
|
|
|
if (startswith(a, "unix:")) {
|
|
a += 5;
|
|
|
|
r = parse_unix_address(b, &a, &guid);
|
|
if (r < 0)
|
|
return r;
|
|
break;
|
|
|
|
} else if (startswith(a, "tcp:")) {
|
|
|
|
a += 4;
|
|
r = parse_tcp_address(b, &a, &guid);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
break;
|
|
|
|
} else if (startswith(a, "unixexec:")) {
|
|
|
|
a += 9;
|
|
r = parse_exec_address(b, &a, &guid);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
break;
|
|
|
|
} else if (startswith(a, "kernel:")) {
|
|
|
|
a += 7;
|
|
r = parse_kernel_address(b, &a, &guid);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
break;
|
|
} else if (startswith(a, "x-machine-unix:")) {
|
|
|
|
a += 15;
|
|
r = parse_container_unix_address(b, &a, &guid);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
break;
|
|
} else if (startswith(a, "x-machine-kernel:")) {
|
|
|
|
a += 17;
|
|
r = parse_container_kernel_address(b, &a, &guid);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
break;
|
|
}
|
|
|
|
a = strchr(a, ';');
|
|
if (!a)
|
|
return 0;
|
|
}
|
|
|
|
if (guid) {
|
|
r = sd_id128_from_string(guid, &b->server_id);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
b->address_index = a - b->address;
|
|
return 1;
|
|
}
|
|
|
|
static int bus_start_address(sd_bus *b) {
|
|
int r;
|
|
|
|
assert(b);
|
|
|
|
for (;;) {
|
|
bool skipped = false;
|
|
|
|
bus_close_fds(b);
|
|
|
|
if (b->exec_path)
|
|
r = bus_socket_exec(b);
|
|
else if ((b->nspid > 0 || b->machine) && b->kernel)
|
|
r = bus_container_connect_kernel(b);
|
|
else if ((b->nspid > 0 || b->machine) && b->sockaddr.sa.sa_family != AF_UNSPEC)
|
|
r = bus_container_connect_socket(b);
|
|
else if (b->kernel)
|
|
r = bus_kernel_connect(b);
|
|
else if (b->sockaddr.sa.sa_family != AF_UNSPEC)
|
|
r = bus_socket_connect(b);
|
|
else
|
|
skipped = true;
|
|
|
|
if (!skipped) {
|
|
if (r >= 0) {
|
|
r = attach_io_events(b);
|
|
if (r >= 0)
|
|
return r;
|
|
}
|
|
|
|
b->last_connect_error = -r;
|
|
}
|
|
|
|
r = bus_parse_next_address(b);
|
|
if (r < 0)
|
|
return r;
|
|
if (r == 0)
|
|
return b->last_connect_error ? -b->last_connect_error : -ECONNREFUSED;
|
|
}
|
|
}
|
|
|
|
int bus_next_address(sd_bus *b) {
|
|
assert(b);
|
|
|
|
bus_reset_parsed_address(b);
|
|
return bus_start_address(b);
|
|
}
|
|
|
|
static int bus_start_fd(sd_bus *b) {
|
|
struct stat st;
|
|
int r;
|
|
|
|
assert(b);
|
|
assert(b->input_fd >= 0);
|
|
assert(b->output_fd >= 0);
|
|
|
|
r = fd_nonblock(b->input_fd, true);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = fd_cloexec(b->input_fd, true);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (b->input_fd != b->output_fd) {
|
|
r = fd_nonblock(b->output_fd, true);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = fd_cloexec(b->output_fd, true);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
if (fstat(b->input_fd, &st) < 0)
|
|
return -errno;
|
|
|
|
if (S_ISCHR(b->input_fd))
|
|
return bus_kernel_take_fd(b);
|
|
else
|
|
return bus_socket_take_fd(b);
|
|
}
|
|
|
|
_public_ int sd_bus_start(sd_bus *bus) {
|
|
int r;
|
|
|
|
assert_return(bus, -EINVAL);
|
|
assert_return(bus->state == BUS_UNSET, -EPERM);
|
|
assert_return(!bus_pid_changed(bus), -ECHILD);
|
|
|
|
bus->state = BUS_OPENING;
|
|
|
|
if (bus->is_server && bus->bus_client)
|
|
return -EINVAL;
|
|
|
|
if (bus->input_fd >= 0)
|
|
r = bus_start_fd(bus);
|
|
else if (bus->address || bus->sockaddr.sa.sa_family != AF_UNSPEC || bus->exec_path || bus->kernel || bus->machine)
|
|
r = bus_start_address(bus);
|
|
else
|
|
return -EINVAL;
|
|
|
|
if (r < 0) {
|
|
sd_bus_close(bus);
|
|
return r;
|
|
}
|
|
|
|
return bus_send_hello(bus);
|
|
}
|
|
|
|
_public_ int sd_bus_open(sd_bus **ret) {
|
|
const char *e;
|
|
sd_bus *b;
|
|
int r;
|
|
|
|
assert_return(ret, -EINVAL);
|
|
|
|
/* Let's connect to the starter bus if it is set, and
|
|
* otherwise to the bus that is appropropriate for the scope
|
|
* we are running in */
|
|
|
|
e = secure_getenv("DBUS_STARTER_BUS_TYPE");
|
|
if (e) {
|
|
if (streq(e, "system"))
|
|
return sd_bus_open_system(ret);
|
|
else if (STR_IN_SET(e, "session", "user"))
|
|
return sd_bus_open_user(ret);
|
|
}
|
|
|
|
e = secure_getenv("DBUS_STARTER_ADDRESS");
|
|
if (!e) {
|
|
if (cg_pid_get_owner_uid(0, NULL) >= 0)
|
|
return sd_bus_open_user(ret);
|
|
else
|
|
return sd_bus_open_system(ret);
|
|
}
|
|
|
|
r = sd_bus_new(&b);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_bus_set_address(b, e);
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
b->bus_client = true;
|
|
|
|
/* We don't know whether the bus is trusted or not, so better
|
|
* be safe, and authenticate everything */
|
|
b->trusted = false;
|
|
b->attach_flags |= KDBUS_ATTACH_CAPS | KDBUS_ATTACH_CREDS;
|
|
b->creds_mask |= SD_BUS_CREDS_UID | SD_BUS_CREDS_EUID | SD_BUS_CREDS_EFFECTIVE_CAPS;
|
|
|
|
r = sd_bus_start(b);
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
*ret = b;
|
|
return 0;
|
|
|
|
fail:
|
|
bus_free(b);
|
|
return r;
|
|
}
|
|
|
|
int bus_set_address_system(sd_bus *b) {
|
|
const char *e;
|
|
assert(b);
|
|
|
|
e = secure_getenv("DBUS_SYSTEM_BUS_ADDRESS");
|
|
if (e)
|
|
return sd_bus_set_address(b, e);
|
|
|
|
if (is_kdbus_available())
|
|
return sd_bus_set_address(b, KERNEL_SYSTEM_BUS_ADDRESS);
|
|
|
|
return sd_bus_set_address(b, UNIX_SYSTEM_BUS_ADDRESS);
|
|
}
|
|
|
|
_public_ int sd_bus_open_system(sd_bus **ret) {
|
|
sd_bus *b;
|
|
int r;
|
|
|
|
assert_return(ret, -EINVAL);
|
|
|
|
r = sd_bus_new(&b);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = bus_set_address_system(b);
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
b->bus_client = true;
|
|
b->is_system = true;
|
|
|
|
/* Let's do per-method access control on the system bus. We
|
|
* need the caller's UID and capability set for that. */
|
|
b->trusted = false;
|
|
b->attach_flags |= KDBUS_ATTACH_CAPS | KDBUS_ATTACH_CREDS;
|
|
b->creds_mask |= SD_BUS_CREDS_UID | SD_BUS_CREDS_EUID | SD_BUS_CREDS_EFFECTIVE_CAPS;
|
|
|
|
r = sd_bus_start(b);
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
*ret = b;
|
|
return 0;
|
|
|
|
fail:
|
|
bus_free(b);
|
|
return r;
|
|
}
|
|
|
|
int bus_set_address_user(sd_bus *b) {
|
|
const char *e;
|
|
|
|
assert(b);
|
|
|
|
e = secure_getenv("DBUS_SESSION_BUS_ADDRESS");
|
|
if (e)
|
|
return sd_bus_set_address(b, e);
|
|
|
|
e = secure_getenv("XDG_RUNTIME_DIR");
|
|
if (is_kdbus_available())
|
|
(void) asprintf(&b->address, KERNEL_USER_BUS_ADDRESS_FMT, getuid());
|
|
else if (e) {
|
|
_cleanup_free_ char *ee = NULL;
|
|
|
|
ee = bus_address_escape(e);
|
|
if (!ee)
|
|
return -ENOMEM;
|
|
|
|
(void) asprintf(&b->address, UNIX_USER_BUS_ADDRESS_FMT, ee);
|
|
}
|
|
|
|
if (!b->address)
|
|
return -ENOMEM;
|
|
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_bus_open_user(sd_bus **ret) {
|
|
sd_bus *b;
|
|
int r;
|
|
|
|
assert_return(ret, -EINVAL);
|
|
|
|
r = sd_bus_new(&b);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = bus_set_address_user(b);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
b->bus_client = true;
|
|
b->is_user = true;
|
|
|
|
/* We don't do any per-method access control on the user
|
|
* bus. */
|
|
b->trusted = true;
|
|
|
|
r = sd_bus_start(b);
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
*ret = b;
|
|
return 0;
|
|
|
|
fail:
|
|
bus_free(b);
|
|
return r;
|
|
}
|
|
|
|
int bus_set_address_system_remote(sd_bus *b, const char *host) {
|
|
_cleanup_free_ char *e = NULL;
|
|
char *m = NULL, *c = NULL;
|
|
|
|
assert(b);
|
|
assert(host);
|
|
|
|
/* Let's see if we shall enter some container */
|
|
m = strchr(host, ':');
|
|
if (m) {
|
|
m++;
|
|
|
|
/* Let's make sure this is not a port of some kind,
|
|
* and is a valid machine name. */
|
|
if (!in_charset(m, "0123456789") && machine_name_is_valid(m)) {
|
|
char *t;
|
|
|
|
/* Cut out the host part */
|
|
t = strndupa(host, m - host - 1);
|
|
e = bus_address_escape(t);
|
|
if (!e)
|
|
return -ENOMEM;
|
|
|
|
c = strjoina(",argv4=--machine=", m);
|
|
}
|
|
}
|
|
|
|
if (!e) {
|
|
e = bus_address_escape(host);
|
|
if (!e)
|
|
return -ENOMEM;
|
|
}
|
|
|
|
b->address = strjoin("unixexec:path=ssh,argv1=-xT,argv2=", e, ",argv3=systemd-stdio-bridge", c, NULL);
|
|
if (!b->address)
|
|
return -ENOMEM;
|
|
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_bus_open_system_remote(sd_bus **ret, const char *host) {
|
|
sd_bus *bus;
|
|
int r;
|
|
|
|
assert_return(host, -EINVAL);
|
|
assert_return(ret, -EINVAL);
|
|
|
|
r = sd_bus_new(&bus);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = bus_set_address_system_remote(bus, host);
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
bus->bus_client = true;
|
|
bus->trusted = false;
|
|
bus->is_system = true;
|
|
|
|
r = sd_bus_start(bus);
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
*ret = bus;
|
|
return 0;
|
|
|
|
fail:
|
|
bus_free(bus);
|
|
return r;
|
|
}
|
|
|
|
int bus_set_address_system_machine(sd_bus *b, const char *machine) {
|
|
_cleanup_free_ char *e = NULL;
|
|
|
|
assert(b);
|
|
assert(machine);
|
|
|
|
e = bus_address_escape(machine);
|
|
if (!e)
|
|
return -ENOMEM;
|
|
|
|
b->address = strjoin("x-machine-kernel:machine=", e, ";x-machine-unix:machine=", e, NULL);
|
|
if (!b->address)
|
|
return -ENOMEM;
|
|
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_bus_open_system_machine(sd_bus **ret, const char *machine) {
|
|
sd_bus *bus;
|
|
int r;
|
|
|
|
assert_return(machine, -EINVAL);
|
|
assert_return(ret, -EINVAL);
|
|
assert_return(machine_name_is_valid(machine), -EINVAL);
|
|
|
|
r = sd_bus_new(&bus);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = bus_set_address_system_machine(bus, machine);
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
bus->bus_client = true;
|
|
bus->trusted = false;
|
|
bus->is_system = true;
|
|
|
|
r = sd_bus_start(bus);
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
*ret = bus;
|
|
return 0;
|
|
|
|
fail:
|
|
bus_free(bus);
|
|
return r;
|
|
}
|
|
|
|
_public_ void sd_bus_close(sd_bus *bus) {
|
|
|
|
if (!bus)
|
|
return;
|
|
if (bus->state == BUS_CLOSED)
|
|
return;
|
|
if (bus_pid_changed(bus))
|
|
return;
|
|
|
|
bus->state = BUS_CLOSED;
|
|
|
|
sd_bus_detach_event(bus);
|
|
|
|
/* Drop all queued messages so that they drop references to
|
|
* the bus object and the bus may be freed */
|
|
bus_reset_queues(bus);
|
|
|
|
if (!bus->is_kernel)
|
|
bus_close_fds(bus);
|
|
|
|
/* We'll leave the fd open in case this is a kernel bus, since
|
|
* there might still be memblocks around that reference this
|
|
* bus, and they might need to invoke the KDBUS_CMD_FREE
|
|
* ioctl on the fd when they are freed. */
|
|
}
|
|
|
|
_public_ sd_bus* sd_bus_flush_close_unref(sd_bus *bus) {
|
|
|
|
if (!bus)
|
|
return NULL;
|
|
|
|
sd_bus_flush(bus);
|
|
sd_bus_close(bus);
|
|
|
|
return sd_bus_unref(bus);
|
|
}
|
|
|
|
static void bus_enter_closing(sd_bus *bus) {
|
|
assert(bus);
|
|
|
|
if (bus->state != BUS_OPENING &&
|
|
bus->state != BUS_AUTHENTICATING &&
|
|
bus->state != BUS_HELLO &&
|
|
bus->state != BUS_RUNNING)
|
|
return;
|
|
|
|
bus->state = BUS_CLOSING;
|
|
}
|
|
|
|
_public_ sd_bus *sd_bus_ref(sd_bus *bus) {
|
|
assert_return(bus, NULL);
|
|
|
|
assert_se(REFCNT_INC(bus->n_ref) >= 2);
|
|
|
|
return bus;
|
|
}
|
|
|
|
_public_ sd_bus *sd_bus_unref(sd_bus *bus) {
|
|
unsigned i;
|
|
|
|
if (!bus)
|
|
return NULL;
|
|
|
|
i = REFCNT_DEC(bus->n_ref);
|
|
if (i > 0)
|
|
return NULL;
|
|
|
|
bus_free(bus);
|
|
return NULL;
|
|
}
|
|
|
|
_public_ int sd_bus_is_open(sd_bus *bus) {
|
|
|
|
assert_return(bus, -EINVAL);
|
|
assert_return(!bus_pid_changed(bus), -ECHILD);
|
|
|
|
return BUS_IS_OPEN(bus->state);
|
|
}
|
|
|
|
_public_ int sd_bus_can_send(sd_bus *bus, char type) {
|
|
int r;
|
|
|
|
assert_return(bus, -EINVAL);
|
|
assert_return(bus->state != BUS_UNSET, -ENOTCONN);
|
|
assert_return(!bus_pid_changed(bus), -ECHILD);
|
|
|
|
if (bus->hello_flags & KDBUS_HELLO_MONITOR)
|
|
return 0;
|
|
|
|
if (type == SD_BUS_TYPE_UNIX_FD) {
|
|
if (!(bus->hello_flags & KDBUS_HELLO_ACCEPT_FD))
|
|
return 0;
|
|
|
|
r = bus_ensure_running(bus);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return bus->can_fds;
|
|
}
|
|
|
|
return bus_type_is_valid(type);
|
|
}
|
|
|
|
_public_ int sd_bus_get_bus_id(sd_bus *bus, sd_id128_t *id) {
|
|
int r;
|
|
|
|
assert_return(bus, -EINVAL);
|
|
assert_return(id, -EINVAL);
|
|
assert_return(!bus_pid_changed(bus), -ECHILD);
|
|
|
|
r = bus_ensure_running(bus);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
*id = bus->server_id;
|
|
return 0;
|
|
}
|
|
|
|
static int bus_seal_message(sd_bus *b, sd_bus_message *m, usec_t timeout) {
|
|
assert(b);
|
|
assert(m);
|
|
|
|
if (m->sealed) {
|
|
/* If we copy the same message to multiple
|
|
* destinations, avoid using the same cookie
|
|
* numbers. */
|
|
b->cookie = MAX(b->cookie, BUS_MESSAGE_COOKIE(m));
|
|
return 0;
|
|
}
|
|
|
|
if (timeout == 0)
|
|
timeout = BUS_DEFAULT_TIMEOUT;
|
|
|
|
return bus_message_seal(m, ++b->cookie, timeout);
|
|
}
|
|
|
|
static int bus_remarshal_message(sd_bus *b, sd_bus_message **m) {
|
|
bool remarshal = false;
|
|
|
|
assert(b);
|
|
|
|
/* wrong packet version */
|
|
if (b->message_version != 0 && b->message_version != (*m)->header->version)
|
|
remarshal = true;
|
|
|
|
/* wrong packet endianness */
|
|
if (b->message_endian != 0 && b->message_endian != (*m)->header->endian)
|
|
remarshal = true;
|
|
|
|
/* TODO: kdbus-messages received from the kernel contain data which is
|
|
* not allowed to be passed to KDBUS_CMD_SEND. Therefore, we have to
|
|
* force remarshaling of the message. Technically, we could just
|
|
* recreate the kdbus message, but that is non-trivial as other parts of
|
|
* the message refer to m->kdbus already. This should be fixed! */
|
|
if ((*m)->kdbus && (*m)->release_kdbus)
|
|
remarshal = true;
|
|
|
|
return remarshal ? bus_message_remarshal(b, m) : 0;
|
|
}
|
|
|
|
int bus_seal_synthetic_message(sd_bus *b, sd_bus_message *m) {
|
|
assert(b);
|
|
assert(m);
|
|
|
|
/* Fake some timestamps, if they were requested, and not
|
|
* already initialized */
|
|
if (b->attach_flags & KDBUS_ATTACH_TIMESTAMP) {
|
|
if (m->realtime <= 0)
|
|
m->realtime = now(CLOCK_REALTIME);
|
|
|
|
if (m->monotonic <= 0)
|
|
m->monotonic = now(CLOCK_MONOTONIC);
|
|
}
|
|
|
|
/* The bus specification says the serial number cannot be 0,
|
|
* hence let's fill something in for synthetic messages. Since
|
|
* synthetic messages might have a fake sender and we don't
|
|
* want to interfere with the real sender's serial numbers we
|
|
* pick a fixed, artificial one. We use (uint32_t) -1 rather
|
|
* than (uint64_t) -1 since dbus1 only had 32bit identifiers,
|
|
* even though kdbus can do 64bit. */
|
|
return bus_message_seal(m, 0xFFFFFFFFULL, 0);
|
|
}
|
|
|
|
static int bus_write_message(sd_bus *bus, sd_bus_message *m, bool hint_sync_call, size_t *idx) {
|
|
int r;
|
|
|
|
assert(bus);
|
|
assert(m);
|
|
|
|
if (bus->is_kernel)
|
|
r = bus_kernel_write_message(bus, m, hint_sync_call);
|
|
else
|
|
r = bus_socket_write_message(bus, m, idx);
|
|
|
|
if (r <= 0)
|
|
return r;
|
|
|
|
if (bus->is_kernel || *idx >= BUS_MESSAGE_SIZE(m))
|
|
log_debug("Sent message type=%s sender=%s destination=%s object=%s interface=%s member=%s cookie=%" PRIu64 " reply_cookie=%" PRIu64 " error=%s",
|
|
bus_message_type_to_string(m->header->type),
|
|
strna(sd_bus_message_get_sender(m)),
|
|
strna(sd_bus_message_get_destination(m)),
|
|
strna(sd_bus_message_get_path(m)),
|
|
strna(sd_bus_message_get_interface(m)),
|
|
strna(sd_bus_message_get_member(m)),
|
|
BUS_MESSAGE_COOKIE(m),
|
|
m->reply_cookie,
|
|
strna(m->error.message));
|
|
|
|
return r;
|
|
}
|
|
|
|
static int dispatch_wqueue(sd_bus *bus) {
|
|
int r, ret = 0;
|
|
|
|
assert(bus);
|
|
assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
|
|
|
|
while (bus->wqueue_size > 0) {
|
|
|
|
r = bus_write_message(bus, bus->wqueue[0], false, &bus->windex);
|
|
if (r < 0)
|
|
return r;
|
|
else if (r == 0)
|
|
/* Didn't do anything this time */
|
|
return ret;
|
|
else if (bus->is_kernel || bus->windex >= BUS_MESSAGE_SIZE(bus->wqueue[0])) {
|
|
/* Fully written. Let's drop the entry from
|
|
* the queue.
|
|
*
|
|
* This isn't particularly optimized, but
|
|
* well, this is supposed to be our worst-case
|
|
* buffer only, and the socket buffer is
|
|
* supposed to be our primary buffer, and if
|
|
* it got full, then all bets are off
|
|
* anyway. */
|
|
|
|
bus->wqueue_size --;
|
|
sd_bus_message_unref(bus->wqueue[0]);
|
|
memmove(bus->wqueue, bus->wqueue + 1, sizeof(sd_bus_message*) * bus->wqueue_size);
|
|
bus->windex = 0;
|
|
|
|
ret = 1;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int bus_read_message(sd_bus *bus, bool hint_priority, int64_t priority) {
|
|
assert(bus);
|
|
|
|
if (bus->is_kernel)
|
|
return bus_kernel_read_message(bus, hint_priority, priority);
|
|
else
|
|
return bus_socket_read_message(bus);
|
|
}
|
|
|
|
int bus_rqueue_make_room(sd_bus *bus) {
|
|
assert(bus);
|
|
|
|
if (bus->rqueue_size >= BUS_RQUEUE_MAX)
|
|
return -ENOBUFS;
|
|
|
|
if (!GREEDY_REALLOC(bus->rqueue, bus->rqueue_allocated, bus->rqueue_size + 1))
|
|
return -ENOMEM;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dispatch_rqueue(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **m) {
|
|
int r, ret = 0;
|
|
|
|
assert(bus);
|
|
assert(m);
|
|
assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
|
|
|
|
/* Note that the priority logic is only available on kdbus,
|
|
* where the rqueue is unused. We check the rqueue here
|
|
* anyway, because it's simple... */
|
|
|
|
for (;;) {
|
|
if (bus->rqueue_size > 0) {
|
|
/* Dispatch a queued message */
|
|
|
|
*m = bus->rqueue[0];
|
|
bus->rqueue_size --;
|
|
memmove(bus->rqueue, bus->rqueue + 1, sizeof(sd_bus_message*) * bus->rqueue_size);
|
|
return 1;
|
|
}
|
|
|
|
/* Try to read a new message */
|
|
r = bus_read_message(bus, hint_priority, priority);
|
|
if (r < 0)
|
|
return r;
|
|
if (r == 0)
|
|
return ret;
|
|
|
|
ret = 1;
|
|
}
|
|
}
|
|
|
|
static int bus_send_internal(sd_bus *bus, sd_bus_message *_m, uint64_t *cookie, bool hint_sync_call) {
|
|
_cleanup_bus_message_unref_ sd_bus_message *m = sd_bus_message_ref(_m);
|
|
int r;
|
|
|
|
assert_return(m, -EINVAL);
|
|
|
|
if (!bus)
|
|
bus = m->bus;
|
|
|
|
assert_return(!bus_pid_changed(bus), -ECHILD);
|
|
assert_return(!bus->is_kernel || !(bus->hello_flags & KDBUS_HELLO_MONITOR), -EROFS);
|
|
|
|
if (!BUS_IS_OPEN(bus->state))
|
|
return -ENOTCONN;
|
|
|
|
if (m->n_fds > 0) {
|
|
r = sd_bus_can_send(bus, SD_BUS_TYPE_UNIX_FD);
|
|
if (r < 0)
|
|
return r;
|
|
if (r == 0)
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
/* If the cookie number isn't kept, then we know that no reply
|
|
* is expected */
|
|
if (!cookie && !m->sealed)
|
|
m->header->flags |= BUS_MESSAGE_NO_REPLY_EXPECTED;
|
|
|
|
r = bus_seal_message(bus, m, 0);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
/* Remarshall if we have to. This will possibly unref the
|
|
* message and place a replacement in m */
|
|
r = bus_remarshal_message(bus, &m);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
/* If this is a reply and no reply was requested, then let's
|
|
* suppress this, if we can */
|
|
if (m->dont_send)
|
|
goto finish;
|
|
|
|
if ((bus->state == BUS_RUNNING || bus->state == BUS_HELLO) && bus->wqueue_size <= 0) {
|
|
size_t idx = 0;
|
|
|
|
r = bus_write_message(bus, m, hint_sync_call, &idx);
|
|
if (r < 0) {
|
|
if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) {
|
|
bus_enter_closing(bus);
|
|
return -ECONNRESET;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
if (!bus->is_kernel && idx < BUS_MESSAGE_SIZE(m)) {
|
|
/* Wasn't fully written. So let's remember how
|
|
* much was written. Note that the first entry
|
|
* of the wqueue array is always allocated so
|
|
* that we always can remember how much was
|
|
* written. */
|
|
bus->wqueue[0] = sd_bus_message_ref(m);
|
|
bus->wqueue_size = 1;
|
|
bus->windex = idx;
|
|
}
|
|
|
|
} else {
|
|
/* Just append it to the queue. */
|
|
|
|
if (bus->wqueue_size >= BUS_WQUEUE_MAX)
|
|
return -ENOBUFS;
|
|
|
|
if (!GREEDY_REALLOC(bus->wqueue, bus->wqueue_allocated, bus->wqueue_size + 1))
|
|
return -ENOMEM;
|
|
|
|
bus->wqueue[bus->wqueue_size ++] = sd_bus_message_ref(m);
|
|
}
|
|
|
|
finish:
|
|
if (cookie)
|
|
*cookie = BUS_MESSAGE_COOKIE(m);
|
|
|
|
return 1;
|
|
}
|
|
|
|
_public_ int sd_bus_send(sd_bus *bus, sd_bus_message *m, uint64_t *cookie) {
|
|
return bus_send_internal(bus, m, cookie, false);
|
|
}
|
|
|
|
_public_ int sd_bus_send_to(sd_bus *bus, sd_bus_message *m, const char *destination, uint64_t *cookie) {
|
|
int r;
|
|
|
|
assert_return(m, -EINVAL);
|
|
|
|
if (!bus)
|
|
bus = m->bus;
|
|
|
|
assert_return(!bus_pid_changed(bus), -ECHILD);
|
|
|
|
if (!BUS_IS_OPEN(bus->state))
|
|
return -ENOTCONN;
|
|
|
|
if (!streq_ptr(m->destination, destination)) {
|
|
|
|
if (!destination)
|
|
return -EEXIST;
|
|
|
|
r = sd_bus_message_set_destination(m, destination);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
return sd_bus_send(bus, m, cookie);
|
|
}
|
|
|
|
static usec_t calc_elapse(uint64_t usec) {
|
|
if (usec == (uint64_t) -1)
|
|
return 0;
|
|
|
|
return now(CLOCK_MONOTONIC) + usec;
|
|
}
|
|
|
|
static int timeout_compare(const void *a, const void *b) {
|
|
const struct reply_callback *x = a, *y = b;
|
|
|
|
if (x->timeout != 0 && y->timeout == 0)
|
|
return -1;
|
|
|
|
if (x->timeout == 0 && y->timeout != 0)
|
|
return 1;
|
|
|
|
if (x->timeout < y->timeout)
|
|
return -1;
|
|
|
|
if (x->timeout > y->timeout)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_bus_call_async(
|
|
sd_bus *bus,
|
|
sd_bus_slot **slot,
|
|
sd_bus_message *_m,
|
|
sd_bus_message_handler_t callback,
|
|
void *userdata,
|
|
uint64_t usec) {
|
|
|
|
_cleanup_bus_message_unref_ sd_bus_message *m = sd_bus_message_ref(_m);
|
|
_cleanup_bus_slot_unref_ sd_bus_slot *s = NULL;
|
|
int r;
|
|
|
|
assert_return(m, -EINVAL);
|
|
assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL);
|
|
assert_return(!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL);
|
|
assert_return(callback, -EINVAL);
|
|
|
|
if (!bus)
|
|
bus = m->bus;
|
|
|
|
assert_return(!bus_pid_changed(bus), -ECHILD);
|
|
assert_return(!bus->is_kernel || !(bus->hello_flags & KDBUS_HELLO_MONITOR), -EROFS);
|
|
|
|
if (!BUS_IS_OPEN(bus->state))
|
|
return -ENOTCONN;
|
|
|
|
r = ordered_hashmap_ensure_allocated(&bus->reply_callbacks, &uint64_hash_ops);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = prioq_ensure_allocated(&bus->reply_callbacks_prioq, timeout_compare);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = bus_seal_message(bus, m, usec);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = bus_remarshal_message(bus, &m);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
s = bus_slot_allocate(bus, !slot, BUS_REPLY_CALLBACK, sizeof(struct reply_callback), userdata);
|
|
if (!s)
|
|
return -ENOMEM;
|
|
|
|
s->reply_callback.callback = callback;
|
|
|
|
s->reply_callback.cookie = BUS_MESSAGE_COOKIE(m);
|
|
r = ordered_hashmap_put(bus->reply_callbacks, &s->reply_callback.cookie, &s->reply_callback);
|
|
if (r < 0) {
|
|
s->reply_callback.cookie = 0;
|
|
return r;
|
|
}
|
|
|
|
s->reply_callback.timeout = calc_elapse(m->timeout);
|
|
if (s->reply_callback.timeout != 0) {
|
|
r = prioq_put(bus->reply_callbacks_prioq, &s->reply_callback, &s->reply_callback.prioq_idx);
|
|
if (r < 0) {
|
|
s->reply_callback.timeout = 0;
|
|
return r;
|
|
}
|
|
}
|
|
|
|
r = sd_bus_send(bus, m, &s->reply_callback.cookie);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (slot)
|
|
*slot = s;
|
|
s = NULL;
|
|
|
|
return r;
|
|
}
|
|
|
|
int bus_ensure_running(sd_bus *bus) {
|
|
int r;
|
|
|
|
assert(bus);
|
|
|
|
if (bus->state == BUS_UNSET || bus->state == BUS_CLOSED || bus->state == BUS_CLOSING)
|
|
return -ENOTCONN;
|
|
if (bus->state == BUS_RUNNING)
|
|
return 1;
|
|
|
|
for (;;) {
|
|
r = sd_bus_process(bus, NULL);
|
|
if (r < 0)
|
|
return r;
|
|
if (bus->state == BUS_RUNNING)
|
|
return 1;
|
|
if (r > 0)
|
|
continue;
|
|
|
|
r = sd_bus_wait(bus, (uint64_t) -1);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
}
|
|
|
|
_public_ int sd_bus_call(
|
|
sd_bus *bus,
|
|
sd_bus_message *_m,
|
|
uint64_t usec,
|
|
sd_bus_error *error,
|
|
sd_bus_message **reply) {
|
|
|
|
_cleanup_bus_message_unref_ sd_bus_message *m = sd_bus_message_ref(_m);
|
|
usec_t timeout;
|
|
uint64_t cookie;
|
|
unsigned i;
|
|
int r;
|
|
|
|
bus_assert_return(m, -EINVAL, error);
|
|
bus_assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL, error);
|
|
bus_assert_return(!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL, error);
|
|
bus_assert_return(!bus_error_is_dirty(error), -EINVAL, error);
|
|
|
|
if (!bus)
|
|
bus = m->bus;
|
|
|
|
bus_assert_return(!bus_pid_changed(bus), -ECHILD, error);
|
|
bus_assert_return(!bus->is_kernel || !(bus->hello_flags & KDBUS_HELLO_MONITOR), -EROFS, error);
|
|
|
|
if (!BUS_IS_OPEN(bus->state)) {
|
|
r = -ENOTCONN;
|
|
goto fail;
|
|
}
|
|
|
|
r = bus_ensure_running(bus);
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
i = bus->rqueue_size;
|
|
|
|
r = bus_seal_message(bus, m, usec);
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
r = bus_remarshal_message(bus, &m);
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
r = bus_send_internal(bus, m, &cookie, true);
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
timeout = calc_elapse(m->timeout);
|
|
|
|
for (;;) {
|
|
usec_t left;
|
|
|
|
while (i < bus->rqueue_size) {
|
|
sd_bus_message *incoming = NULL;
|
|
|
|
incoming = bus->rqueue[i];
|
|
|
|
if (incoming->reply_cookie == cookie) {
|
|
/* Found a match! */
|
|
|
|
memmove(bus->rqueue + i, bus->rqueue + i + 1, sizeof(sd_bus_message*) * (bus->rqueue_size - i - 1));
|
|
bus->rqueue_size--;
|
|
log_debug_bus_message(incoming);
|
|
|
|
if (incoming->header->type == SD_BUS_MESSAGE_METHOD_RETURN) {
|
|
|
|
if (incoming->n_fds <= 0 || (bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) {
|
|
if (reply)
|
|
*reply = incoming;
|
|
else
|
|
sd_bus_message_unref(incoming);
|
|
|
|
return 1;
|
|
}
|
|
|
|
r = sd_bus_error_setf(error, SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Reply message contained file descriptors which I couldn't accept. Sorry.");
|
|
sd_bus_message_unref(incoming);
|
|
return r;
|
|
|
|
} else if (incoming->header->type == SD_BUS_MESSAGE_METHOD_ERROR) {
|
|
r = sd_bus_error_copy(error, &incoming->error);
|
|
sd_bus_message_unref(incoming);
|
|
return r;
|
|
} else {
|
|
r = -EIO;
|
|
goto fail;
|
|
}
|
|
|
|
} else if (BUS_MESSAGE_COOKIE(incoming) == cookie &&
|
|
bus->unique_name &&
|
|
incoming->sender &&
|
|
streq(bus->unique_name, incoming->sender)) {
|
|
|
|
memmove(bus->rqueue + i, bus->rqueue + i + 1, sizeof(sd_bus_message*) * (bus->rqueue_size - i - 1));
|
|
bus->rqueue_size--;
|
|
|
|
/* Our own message? Somebody is trying
|
|
* to send its own client a message,
|
|
* let's not dead-lock, let's fail
|
|
* immediately. */
|
|
|
|
sd_bus_message_unref(incoming);
|
|
r = -ELOOP;
|
|
goto fail;
|
|
}
|
|
|
|
/* Try to read more, right-away */
|
|
i++;
|
|
}
|
|
|
|
r = bus_read_message(bus, false, 0);
|
|
if (r < 0) {
|
|
if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) {
|
|
bus_enter_closing(bus);
|
|
r = -ECONNRESET;
|
|
}
|
|
|
|
goto fail;
|
|
}
|
|
if (r > 0)
|
|
continue;
|
|
|
|
if (timeout > 0) {
|
|
usec_t n;
|
|
|
|
n = now(CLOCK_MONOTONIC);
|
|
if (n >= timeout) {
|
|
r = -ETIMEDOUT;
|
|
goto fail;
|
|
}
|
|
|
|
left = timeout - n;
|
|
} else
|
|
left = (uint64_t) -1;
|
|
|
|
r = bus_poll(bus, true, left);
|
|
if (r < 0)
|
|
goto fail;
|
|
if (r == 0) {
|
|
r = -ETIMEDOUT;
|
|
goto fail;
|
|
}
|
|
|
|
r = dispatch_wqueue(bus);
|
|
if (r < 0) {
|
|
if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) {
|
|
bus_enter_closing(bus);
|
|
r = -ECONNRESET;
|
|
}
|
|
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
fail:
|
|
return sd_bus_error_set_errno(error, r);
|
|
}
|
|
|
|
_public_ int sd_bus_get_fd(sd_bus *bus) {
|
|
|
|
assert_return(bus, -EINVAL);
|
|
assert_return(bus->input_fd == bus->output_fd, -EPERM);
|
|
assert_return(!bus_pid_changed(bus), -ECHILD);
|
|
|
|
return bus->input_fd;
|
|
}
|
|
|
|
_public_ int sd_bus_get_events(sd_bus *bus) {
|
|
int flags = 0;
|
|
|
|
assert_return(bus, -EINVAL);
|
|
assert_return(!bus_pid_changed(bus), -ECHILD);
|
|
|
|
if (!BUS_IS_OPEN(bus->state) && bus->state != BUS_CLOSING)
|
|
return -ENOTCONN;
|
|
|
|
if (bus->state == BUS_OPENING)
|
|
flags |= POLLOUT;
|
|
else if (bus->state == BUS_AUTHENTICATING) {
|
|
|
|
if (bus_socket_auth_needs_write(bus))
|
|
flags |= POLLOUT;
|
|
|
|
flags |= POLLIN;
|
|
|
|
} else if (bus->state == BUS_RUNNING || bus->state == BUS_HELLO) {
|
|
if (bus->rqueue_size <= 0)
|
|
flags |= POLLIN;
|
|
if (bus->wqueue_size > 0)
|
|
flags |= POLLOUT;
|
|
}
|
|
|
|
return flags;
|
|
}
|
|
|
|
_public_ int sd_bus_get_timeout(sd_bus *bus, uint64_t *timeout_usec) {
|
|
struct reply_callback *c;
|
|
|
|
assert_return(bus, -EINVAL);
|
|
assert_return(timeout_usec, -EINVAL);
|
|
assert_return(!bus_pid_changed(bus), -ECHILD);
|
|
|
|
if (!BUS_IS_OPEN(bus->state) && bus->state != BUS_CLOSING)
|
|
return -ENOTCONN;
|
|
|
|
if (bus->track_queue) {
|
|
*timeout_usec = 0;
|
|
return 1;
|
|
}
|
|
|
|
if (bus->state == BUS_CLOSING) {
|
|
*timeout_usec = 0;
|
|
return 1;
|
|
}
|
|
|
|
if (bus->state == BUS_AUTHENTICATING) {
|
|
*timeout_usec = bus->auth_timeout;
|
|
return 1;
|
|
}
|
|
|
|
if (bus->state != BUS_RUNNING && bus->state != BUS_HELLO) {
|
|
*timeout_usec = (uint64_t) -1;
|
|
return 0;
|
|
}
|
|
|
|
if (bus->rqueue_size > 0) {
|
|
*timeout_usec = 0;
|
|
return 1;
|
|
}
|
|
|
|
c = prioq_peek(bus->reply_callbacks_prioq);
|
|
if (!c) {
|
|
*timeout_usec = (uint64_t) -1;
|
|
return 0;
|
|
}
|
|
|
|
if (c->timeout == 0) {
|
|
*timeout_usec = (uint64_t) -1;
|
|
return 0;
|
|
}
|
|
|
|
*timeout_usec = c->timeout;
|
|
return 1;
|
|
}
|
|
|
|
static int process_timeout(sd_bus *bus) {
|
|
_cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL;
|
|
_cleanup_bus_message_unref_ sd_bus_message* m = NULL;
|
|
struct reply_callback *c;
|
|
sd_bus_slot *slot;
|
|
usec_t n;
|
|
int r;
|
|
|
|
assert(bus);
|
|
|
|
c = prioq_peek(bus->reply_callbacks_prioq);
|
|
if (!c)
|
|
return 0;
|
|
|
|
n = now(CLOCK_MONOTONIC);
|
|
if (c->timeout > n)
|
|
return 0;
|
|
|
|
r = bus_message_new_synthetic_error(
|
|
bus,
|
|
c->cookie,
|
|
&SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Method call timed out"),
|
|
&m);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = bus_seal_synthetic_message(bus, m);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
assert_se(prioq_pop(bus->reply_callbacks_prioq) == c);
|
|
c->timeout = 0;
|
|
|
|
ordered_hashmap_remove(bus->reply_callbacks, &c->cookie);
|
|
c->cookie = 0;
|
|
|
|
slot = container_of(c, sd_bus_slot, reply_callback);
|
|
|
|
bus->iteration_counter ++;
|
|
|
|
bus->current_message = m;
|
|
bus->current_slot = sd_bus_slot_ref(slot);
|
|
bus->current_handler = c->callback;
|
|
bus->current_userdata = slot->userdata;
|
|
r = c->callback(m, slot->userdata, &error_buffer);
|
|
bus->current_userdata = NULL;
|
|
bus->current_handler = NULL;
|
|
bus->current_slot = NULL;
|
|
bus->current_message = NULL;
|
|
|
|
if (slot->floating) {
|
|
bus_slot_disconnect(slot);
|
|
sd_bus_slot_unref(slot);
|
|
}
|
|
|
|
sd_bus_slot_unref(slot);
|
|
|
|
return bus_maybe_reply_error(m, r, &error_buffer);
|
|
}
|
|
|
|
static int process_hello(sd_bus *bus, sd_bus_message *m) {
|
|
assert(bus);
|
|
assert(m);
|
|
|
|
if (bus->state != BUS_HELLO)
|
|
return 0;
|
|
|
|
/* Let's make sure the first message on the bus is the HELLO
|
|
* reply. But note that we don't actually parse the message
|
|
* here (we leave that to the usual handling), we just verify
|
|
* we don't let any earlier msg through. */
|
|
|
|
if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN &&
|
|
m->header->type != SD_BUS_MESSAGE_METHOD_ERROR)
|
|
return -EIO;
|
|
|
|
if (m->reply_cookie != 1)
|
|
return -EIO;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int process_reply(sd_bus *bus, sd_bus_message *m) {
|
|
_cleanup_bus_message_unref_ sd_bus_message *synthetic_reply = NULL;
|
|
_cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL;
|
|
struct reply_callback *c;
|
|
sd_bus_slot *slot;
|
|
int r;
|
|
|
|
assert(bus);
|
|
assert(m);
|
|
|
|
if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN &&
|
|
m->header->type != SD_BUS_MESSAGE_METHOD_ERROR)
|
|
return 0;
|
|
|
|
if (bus->is_kernel && (bus->hello_flags & KDBUS_HELLO_MONITOR))
|
|
return 0;
|
|
|
|
if (m->destination && bus->unique_name && !streq_ptr(m->destination, bus->unique_name))
|
|
return 0;
|
|
|
|
c = ordered_hashmap_remove(bus->reply_callbacks, &m->reply_cookie);
|
|
if (!c)
|
|
return 0;
|
|
|
|
c->cookie = 0;
|
|
|
|
slot = container_of(c, sd_bus_slot, reply_callback);
|
|
|
|
if (m->n_fds > 0 && !(bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) {
|
|
|
|
/* If the reply contained a file descriptor which we
|
|
* didn't want we pass an error instead. */
|
|
|
|
r = bus_message_new_synthetic_error(
|
|
bus,
|
|
m->reply_cookie,
|
|
&SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Reply message contained file descriptor"),
|
|
&synthetic_reply);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
/* Copy over original timestamp */
|
|
synthetic_reply->realtime = m->realtime;
|
|
synthetic_reply->monotonic = m->monotonic;
|
|
synthetic_reply->seqnum = m->seqnum;
|
|
|
|
r = bus_seal_synthetic_message(bus, synthetic_reply);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
m = synthetic_reply;
|
|
} else {
|
|
r = sd_bus_message_rewind(m, true);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
if (c->timeout != 0) {
|
|
prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx);
|
|
c->timeout = 0;
|
|
}
|
|
|
|
bus->current_slot = sd_bus_slot_ref(slot);
|
|
bus->current_handler = c->callback;
|
|
bus->current_userdata = slot->userdata;
|
|
r = c->callback(m, slot->userdata, &error_buffer);
|
|
bus->current_userdata = NULL;
|
|
bus->current_handler = NULL;
|
|
bus->current_slot = NULL;
|
|
|
|
if (slot->floating) {
|
|
bus_slot_disconnect(slot);
|
|
sd_bus_slot_unref(slot);
|
|
}
|
|
|
|
sd_bus_slot_unref(slot);
|
|
|
|
return bus_maybe_reply_error(m, r, &error_buffer);
|
|
}
|
|
|
|
static int process_filter(sd_bus *bus, sd_bus_message *m) {
|
|
_cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL;
|
|
struct filter_callback *l;
|
|
int r;
|
|
|
|
assert(bus);
|
|
assert(m);
|
|
|
|
do {
|
|
bus->filter_callbacks_modified = false;
|
|
|
|
LIST_FOREACH(callbacks, l, bus->filter_callbacks) {
|
|
sd_bus_slot *slot;
|
|
|
|
if (bus->filter_callbacks_modified)
|
|
break;
|
|
|
|
/* Don't run this more than once per iteration */
|
|
if (l->last_iteration == bus->iteration_counter)
|
|
continue;
|
|
|
|
l->last_iteration = bus->iteration_counter;
|
|
|
|
r = sd_bus_message_rewind(m, true);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
slot = container_of(l, sd_bus_slot, filter_callback);
|
|
|
|
bus->current_slot = sd_bus_slot_ref(slot);
|
|
bus->current_handler = l->callback;
|
|
bus->current_userdata = slot->userdata;
|
|
r = l->callback(m, slot->userdata, &error_buffer);
|
|
bus->current_userdata = NULL;
|
|
bus->current_handler = NULL;
|
|
bus->current_slot = sd_bus_slot_unref(slot);
|
|
|
|
r = bus_maybe_reply_error(m, r, &error_buffer);
|
|
if (r != 0)
|
|
return r;
|
|
|
|
}
|
|
|
|
} while (bus->filter_callbacks_modified);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int process_match(sd_bus *bus, sd_bus_message *m) {
|
|
int r;
|
|
|
|
assert(bus);
|
|
assert(m);
|
|
|
|
do {
|
|
bus->match_callbacks_modified = false;
|
|
|
|
r = bus_match_run(bus, &bus->match_callbacks, m);
|
|
if (r != 0)
|
|
return r;
|
|
|
|
} while (bus->match_callbacks_modified);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int process_builtin(sd_bus *bus, sd_bus_message *m) {
|
|
_cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
|
|
int r;
|
|
|
|
assert(bus);
|
|
assert(m);
|
|
|
|
if (bus->hello_flags & KDBUS_HELLO_MONITOR)
|
|
return 0;
|
|
|
|
if (bus->manual_peer_interface)
|
|
return 0;
|
|
|
|
if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL)
|
|
return 0;
|
|
|
|
if (!streq_ptr(m->interface, "org.freedesktop.DBus.Peer"))
|
|
return 0;
|
|
|
|
if (m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED)
|
|
return 1;
|
|
|
|
if (streq_ptr(m->member, "Ping"))
|
|
r = sd_bus_message_new_method_return(m, &reply);
|
|
else if (streq_ptr(m->member, "GetMachineId")) {
|
|
sd_id128_t id;
|
|
char sid[33];
|
|
|
|
r = sd_id128_get_machine(&id);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_bus_message_new_method_return(m, &reply);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_bus_message_append(reply, "s", sd_id128_to_string(id, sid));
|
|
} else {
|
|
r = sd_bus_message_new_method_errorf(
|
|
m, &reply,
|
|
SD_BUS_ERROR_UNKNOWN_METHOD,
|
|
"Unknown method '%s' on interface '%s'.", m->member, m->interface);
|
|
}
|
|
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_bus_send(bus, reply, NULL);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int process_fd_check(sd_bus *bus, sd_bus_message *m) {
|
|
assert(bus);
|
|
assert(m);
|
|
|
|
/* If we got a message with a file descriptor which we didn't
|
|
* want to accept, then let's drop it. How can this even
|
|
* happen? For example, when the kernel queues a message into
|
|
* an activatable names's queue which allows fds, and then is
|
|
* delivered to us later even though we ourselves did not
|
|
* negotiate it. */
|
|
|
|
if (bus->hello_flags & KDBUS_HELLO_MONITOR)
|
|
return 0;
|
|
|
|
if (m->n_fds <= 0)
|
|
return 0;
|
|
|
|
if (bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)
|
|
return 0;
|
|
|
|
if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL)
|
|
return 1; /* just eat it up */
|
|
|
|
return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Message contains file descriptors, which I cannot accept. Sorry.");
|
|
}
|
|
|
|
static int process_message(sd_bus *bus, sd_bus_message *m) {
|
|
int r;
|
|
|
|
assert(bus);
|
|
assert(m);
|
|
|
|
bus->current_message = m;
|
|
bus->iteration_counter++;
|
|
|
|
log_debug_bus_message(m);
|
|
|
|
r = process_hello(bus, m);
|
|
if (r != 0)
|
|
goto finish;
|
|
|
|
r = process_reply(bus, m);
|
|
if (r != 0)
|
|
goto finish;
|
|
|
|
r = process_fd_check(bus, m);
|
|
if (r != 0)
|
|
goto finish;
|
|
|
|
r = process_filter(bus, m);
|
|
if (r != 0)
|
|
goto finish;
|
|
|
|
r = process_match(bus, m);
|
|
if (r != 0)
|
|
goto finish;
|
|
|
|
r = process_builtin(bus, m);
|
|
if (r != 0)
|
|
goto finish;
|
|
|
|
r = bus_process_object(bus, m);
|
|
|
|
finish:
|
|
bus->current_message = NULL;
|
|
return r;
|
|
}
|
|
|
|
static int dispatch_track(sd_bus *bus) {
|
|
assert(bus);
|
|
|
|
if (!bus->track_queue)
|
|
return 0;
|
|
|
|
bus_track_dispatch(bus->track_queue);
|
|
return 1;
|
|
}
|
|
|
|
static int process_running(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **ret) {
|
|
_cleanup_bus_message_unref_ sd_bus_message *m = NULL;
|
|
int r;
|
|
|
|
assert(bus);
|
|
assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
|
|
|
|
r = process_timeout(bus);
|
|
if (r != 0)
|
|
goto null_message;
|
|
|
|
r = dispatch_wqueue(bus);
|
|
if (r != 0)
|
|
goto null_message;
|
|
|
|
r = dispatch_track(bus);
|
|
if (r != 0)
|
|
goto null_message;
|
|
|
|
r = dispatch_rqueue(bus, hint_priority, priority, &m);
|
|
if (r < 0)
|
|
return r;
|
|
if (!m)
|
|
goto null_message;
|
|
|
|
r = process_message(bus, m);
|
|
if (r != 0)
|
|
goto null_message;
|
|
|
|
if (ret) {
|
|
r = sd_bus_message_rewind(m, true);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
*ret = m;
|
|
m = NULL;
|
|
return 1;
|
|
}
|
|
|
|
if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL) {
|
|
|
|
log_debug("Unprocessed message call sender=%s object=%s interface=%s member=%s",
|
|
strna(sd_bus_message_get_sender(m)),
|
|
strna(sd_bus_message_get_path(m)),
|
|
strna(sd_bus_message_get_interface(m)),
|
|
strna(sd_bus_message_get_member(m)));
|
|
|
|
r = sd_bus_reply_method_errorf(
|
|
m,
|
|
SD_BUS_ERROR_UNKNOWN_OBJECT,
|
|
"Unknown object '%s'.", m->path);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
return 1;
|
|
|
|
null_message:
|
|
if (r >= 0 && ret)
|
|
*ret = NULL;
|
|
|
|
return r;
|
|
}
|
|
|
|
static int process_closing(sd_bus *bus, sd_bus_message **ret) {
|
|
_cleanup_bus_message_unref_ sd_bus_message *m = NULL;
|
|
struct reply_callback *c;
|
|
int r;
|
|
|
|
assert(bus);
|
|
assert(bus->state == BUS_CLOSING);
|
|
|
|
c = ordered_hashmap_first(bus->reply_callbacks);
|
|
if (c) {
|
|
_cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL;
|
|
sd_bus_slot *slot;
|
|
|
|
/* First, fail all outstanding method calls */
|
|
r = bus_message_new_synthetic_error(
|
|
bus,
|
|
c->cookie,
|
|
&SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Connection terminated"),
|
|
&m);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = bus_seal_synthetic_message(bus, m);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (c->timeout != 0) {
|
|
prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx);
|
|
c->timeout = 0;
|
|
}
|
|
|
|
ordered_hashmap_remove(bus->reply_callbacks, &c->cookie);
|
|
c->cookie = 0;
|
|
|
|
slot = container_of(c, sd_bus_slot, reply_callback);
|
|
|
|
bus->iteration_counter++;
|
|
|
|
bus->current_message = m;
|
|
bus->current_slot = sd_bus_slot_ref(slot);
|
|
bus->current_handler = c->callback;
|
|
bus->current_userdata = slot->userdata;
|
|
r = c->callback(m, slot->userdata, &error_buffer);
|
|
bus->current_userdata = NULL;
|
|
bus->current_handler = NULL;
|
|
bus->current_slot = NULL;
|
|
bus->current_message = NULL;
|
|
|
|
if (slot->floating) {
|
|
bus_slot_disconnect(slot);
|
|
sd_bus_slot_unref(slot);
|
|
}
|
|
|
|
sd_bus_slot_unref(slot);
|
|
|
|
return bus_maybe_reply_error(m, r, &error_buffer);
|
|
}
|
|
|
|
/* Then, synthesize a Disconnected message */
|
|
r = sd_bus_message_new_signal(
|
|
bus,
|
|
&m,
|
|
"/org/freedesktop/DBus/Local",
|
|
"org.freedesktop.DBus.Local",
|
|
"Disconnected");
|
|
if (r < 0)
|
|
return r;
|
|
|
|
bus_message_set_sender_local(bus, m);
|
|
|
|
r = bus_seal_synthetic_message(bus, m);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
sd_bus_close(bus);
|
|
|
|
bus->current_message = m;
|
|
bus->iteration_counter++;
|
|
|
|
r = process_filter(bus, m);
|
|
if (r != 0)
|
|
goto finish;
|
|
|
|
r = process_match(bus, m);
|
|
if (r != 0)
|
|
goto finish;
|
|
|
|
if (ret) {
|
|
*ret = m;
|
|
m = NULL;
|
|
}
|
|
|
|
r = 1;
|
|
|
|
finish:
|
|
bus->current_message = NULL;
|
|
|
|
return r;
|
|
}
|
|
|
|
static int bus_process_internal(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **ret) {
|
|
BUS_DONT_DESTROY(bus);
|
|
int r;
|
|
|
|
/* Returns 0 when we didn't do anything. This should cause the
|
|
* caller to invoke sd_bus_wait() before returning the next
|
|
* time. Returns > 0 when we did something, which possibly
|
|
* means *ret is filled in with an unprocessed message. */
|
|
|
|
assert_return(bus, -EINVAL);
|
|
assert_return(!bus_pid_changed(bus), -ECHILD);
|
|
|
|
/* We don't allow recursively invoking sd_bus_process(). */
|
|
assert_return(!bus->current_message, -EBUSY);
|
|
assert(!bus->current_slot);
|
|
|
|
switch (bus->state) {
|
|
|
|
case BUS_UNSET:
|
|
return -ENOTCONN;
|
|
|
|
case BUS_CLOSED:
|
|
return -ECONNRESET;
|
|
|
|
case BUS_OPENING:
|
|
r = bus_socket_process_opening(bus);
|
|
if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) {
|
|
bus_enter_closing(bus);
|
|
r = 1;
|
|
} else if (r < 0)
|
|
return r;
|
|
if (ret)
|
|
*ret = NULL;
|
|
return r;
|
|
|
|
case BUS_AUTHENTICATING:
|
|
r = bus_socket_process_authenticating(bus);
|
|
if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) {
|
|
bus_enter_closing(bus);
|
|
r = 1;
|
|
} else if (r < 0)
|
|
return r;
|
|
|
|
if (ret)
|
|
*ret = NULL;
|
|
|
|
return r;
|
|
|
|
case BUS_RUNNING:
|
|
case BUS_HELLO:
|
|
r = process_running(bus, hint_priority, priority, ret);
|
|
if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) {
|
|
bus_enter_closing(bus);
|
|
r = 1;
|
|
|
|
if (ret)
|
|
*ret = NULL;
|
|
}
|
|
|
|
return r;
|
|
|
|
case BUS_CLOSING:
|
|
return process_closing(bus, ret);
|
|
}
|
|
|
|
assert_not_reached("Unknown state");
|
|
}
|
|
|
|
_public_ int sd_bus_process(sd_bus *bus, sd_bus_message **ret) {
|
|
return bus_process_internal(bus, false, 0, ret);
|
|
}
|
|
|
|
_public_ int sd_bus_process_priority(sd_bus *bus, int64_t priority, sd_bus_message **ret) {
|
|
return bus_process_internal(bus, true, priority, ret);
|
|
}
|
|
|
|
static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec) {
|
|
struct pollfd p[2] = {};
|
|
int r, e, n;
|
|
struct timespec ts;
|
|
usec_t m = USEC_INFINITY;
|
|
|
|
assert(bus);
|
|
|
|
if (bus->state == BUS_CLOSING)
|
|
return 1;
|
|
|
|
if (!BUS_IS_OPEN(bus->state))
|
|
return -ENOTCONN;
|
|
|
|
e = sd_bus_get_events(bus);
|
|
if (e < 0)
|
|
return e;
|
|
|
|
if (need_more)
|
|
/* The caller really needs some more data, he doesn't
|
|
* care about what's already read, or any timeouts
|
|
* except its own. */
|
|
e |= POLLIN;
|
|
else {
|
|
usec_t until;
|
|
/* The caller wants to process if there's something to
|
|
* process, but doesn't care otherwise */
|
|
|
|
r = sd_bus_get_timeout(bus, &until);
|
|
if (r < 0)
|
|
return r;
|
|
if (r > 0) {
|
|
usec_t nw;
|
|
nw = now(CLOCK_MONOTONIC);
|
|
m = until > nw ? until - nw : 0;
|
|
}
|
|
}
|
|
|
|
if (timeout_usec != (uint64_t) -1 && (m == (uint64_t) -1 || timeout_usec < m))
|
|
m = timeout_usec;
|
|
|
|
p[0].fd = bus->input_fd;
|
|
if (bus->output_fd == bus->input_fd) {
|
|
p[0].events = e;
|
|
n = 1;
|
|
} else {
|
|
p[0].events = e & POLLIN;
|
|
p[1].fd = bus->output_fd;
|
|
p[1].events = e & POLLOUT;
|
|
n = 2;
|
|
}
|
|
|
|
r = ppoll(p, n, m == (uint64_t) -1 ? NULL : timespec_store(&ts, m), NULL);
|
|
if (r < 0)
|
|
return -errno;
|
|
|
|
return r > 0 ? 1 : 0;
|
|
}
|
|
|
|
_public_ int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) {
|
|
|
|
assert_return(bus, -EINVAL);
|
|
assert_return(!bus_pid_changed(bus), -ECHILD);
|
|
|
|
if (bus->state == BUS_CLOSING)
|
|
return 0;
|
|
|
|
if (!BUS_IS_OPEN(bus->state))
|
|
return -ENOTCONN;
|
|
|
|
if (bus->rqueue_size > 0)
|
|
return 0;
|
|
|
|
return bus_poll(bus, false, timeout_usec);
|
|
}
|
|
|
|
_public_ int sd_bus_flush(sd_bus *bus) {
|
|
int r;
|
|
|
|
assert_return(bus, -EINVAL);
|
|
assert_return(!bus_pid_changed(bus), -ECHILD);
|
|
|
|
if (bus->state == BUS_CLOSING)
|
|
return 0;
|
|
|
|
if (!BUS_IS_OPEN(bus->state))
|
|
return -ENOTCONN;
|
|
|
|
r = bus_ensure_running(bus);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (bus->wqueue_size <= 0)
|
|
return 0;
|
|
|
|
for (;;) {
|
|
r = dispatch_wqueue(bus);
|
|
if (r < 0) {
|
|
if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) {
|
|
bus_enter_closing(bus);
|
|
return -ECONNRESET;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
if (bus->wqueue_size <= 0)
|
|
return 0;
|
|
|
|
r = bus_poll(bus, false, (uint64_t) -1);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
}
|
|
|
|
_public_ int sd_bus_add_filter(
|
|
sd_bus *bus,
|
|
sd_bus_slot **slot,
|
|
sd_bus_message_handler_t callback,
|
|
void *userdata) {
|
|
|
|
sd_bus_slot *s;
|
|
|
|
assert_return(bus, -EINVAL);
|
|
assert_return(callback, -EINVAL);
|
|
assert_return(!bus_pid_changed(bus), -ECHILD);
|
|
|
|
s = bus_slot_allocate(bus, !slot, BUS_FILTER_CALLBACK, sizeof(struct filter_callback), userdata);
|
|
if (!s)
|
|
return -ENOMEM;
|
|
|
|
s->filter_callback.callback = callback;
|
|
|
|
bus->filter_callbacks_modified = true;
|
|
LIST_PREPEND(callbacks, bus->filter_callbacks, &s->filter_callback);
|
|
|
|
if (slot)
|
|
*slot = s;
|
|
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_bus_add_match(
|
|
sd_bus *bus,
|
|
sd_bus_slot **slot,
|
|
const char *match,
|
|
sd_bus_message_handler_t callback,
|
|
void *userdata) {
|
|
|
|
struct bus_match_component *components = NULL;
|
|
unsigned n_components = 0;
|
|
sd_bus_slot *s = NULL;
|
|
int r = 0;
|
|
|
|
assert_return(bus, -EINVAL);
|
|
assert_return(match, -EINVAL);
|
|
assert_return(!bus_pid_changed(bus), -ECHILD);
|
|
|
|
r = bus_match_parse(match, &components, &n_components);
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
s = bus_slot_allocate(bus, !slot, BUS_MATCH_CALLBACK, sizeof(struct match_callback), userdata);
|
|
if (!s) {
|
|
r = -ENOMEM;
|
|
goto finish;
|
|
}
|
|
|
|
s->match_callback.callback = callback;
|
|
s->match_callback.cookie = ++bus->match_cookie;
|
|
|
|
if (bus->bus_client) {
|
|
enum bus_match_scope scope;
|
|
|
|
scope = bus_match_get_scope(components, n_components);
|
|
|
|
/* Do not install server-side matches for matches
|
|
* against the local service, interface or bus
|
|
* path. */
|
|
if (scope != BUS_MATCH_LOCAL) {
|
|
|
|
if (!bus->is_kernel) {
|
|
/* When this is not a kernel transport, we
|
|
* store the original match string, so that we
|
|
* can use it to remove the match again */
|
|
|
|
s->match_callback.match_string = strdup(match);
|
|
if (!s->match_callback.match_string) {
|
|
r = -ENOMEM;
|
|
goto finish;
|
|
}
|
|
}
|
|
|
|
r = bus_add_match_internal(bus, s->match_callback.match_string, components, n_components, s->match_callback.cookie);
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
s->match_added = true;
|
|
}
|
|
}
|
|
|
|
bus->match_callbacks_modified = true;
|
|
r = bus_match_add(&bus->match_callbacks, components, n_components, &s->match_callback);
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
if (slot)
|
|
*slot = s;
|
|
s = NULL;
|
|
|
|
finish:
|
|
bus_match_parse_free(components, n_components);
|
|
sd_bus_slot_unref(s);
|
|
|
|
return r;
|
|
}
|
|
|
|
int bus_remove_match_by_string(
|
|
sd_bus *bus,
|
|
const char *match,
|
|
sd_bus_message_handler_t callback,
|
|
void *userdata) {
|
|
|
|
struct bus_match_component *components = NULL;
|
|
unsigned n_components = 0;
|
|
struct match_callback *c;
|
|
int r = 0;
|
|
|
|
assert_return(bus, -EINVAL);
|
|
assert_return(match, -EINVAL);
|
|
assert_return(!bus_pid_changed(bus), -ECHILD);
|
|
|
|
r = bus_match_parse(match, &components, &n_components);
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
r = bus_match_find(&bus->match_callbacks, components, n_components, NULL, NULL, &c);
|
|
if (r <= 0)
|
|
goto finish;
|
|
|
|
sd_bus_slot_unref(container_of(c, sd_bus_slot, match_callback));
|
|
|
|
finish:
|
|
bus_match_parse_free(components, n_components);
|
|
|
|
return r;
|
|
}
|
|
|
|
bool bus_pid_changed(sd_bus *bus) {
|
|
assert(bus);
|
|
|
|
/* We don't support people creating a bus connection and
|
|
* keeping it around over a fork(). Let's complain. */
|
|
|
|
return bus->original_pid != getpid();
|
|
}
|
|
|
|
static int io_callback(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
|
|
sd_bus *bus = userdata;
|
|
int r;
|
|
|
|
assert(bus);
|
|
|
|
r = sd_bus_process(bus, NULL);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int time_callback(sd_event_source *s, uint64_t usec, void *userdata) {
|
|
sd_bus *bus = userdata;
|
|
int r;
|
|
|
|
assert(bus);
|
|
|
|
r = sd_bus_process(bus, NULL);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int prepare_callback(sd_event_source *s, void *userdata) {
|
|
sd_bus *bus = userdata;
|
|
int r, e;
|
|
usec_t until;
|
|
|
|
assert(s);
|
|
assert(bus);
|
|
|
|
e = sd_bus_get_events(bus);
|
|
if (e < 0)
|
|
return e;
|
|
|
|
if (bus->output_fd != bus->input_fd) {
|
|
|
|
r = sd_event_source_set_io_events(bus->input_io_event_source, e & POLLIN);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_event_source_set_io_events(bus->output_io_event_source, e & POLLOUT);
|
|
if (r < 0)
|
|
return r;
|
|
} else {
|
|
r = sd_event_source_set_io_events(bus->input_io_event_source, e);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
r = sd_bus_get_timeout(bus, &until);
|
|
if (r < 0)
|
|
return r;
|
|
if (r > 0) {
|
|
int j;
|
|
|
|
j = sd_event_source_set_time(bus->time_event_source, until);
|
|
if (j < 0)
|
|
return j;
|
|
}
|
|
|
|
r = sd_event_source_set_enabled(bus->time_event_source, r > 0);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int quit_callback(sd_event_source *event, void *userdata) {
|
|
sd_bus *bus = userdata;
|
|
|
|
assert(event);
|
|
|
|
sd_bus_flush(bus);
|
|
sd_bus_close(bus);
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int attach_io_events(sd_bus *bus) {
|
|
int r;
|
|
|
|
assert(bus);
|
|
|
|
if (bus->input_fd < 0)
|
|
return 0;
|
|
|
|
if (!bus->event)
|
|
return 0;
|
|
|
|
if (!bus->input_io_event_source) {
|
|
r = sd_event_add_io(bus->event, &bus->input_io_event_source, bus->input_fd, 0, io_callback, bus);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_event_source_set_prepare(bus->input_io_event_source, prepare_callback);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_event_source_set_priority(bus->input_io_event_source, bus->event_priority);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_event_source_set_description(bus->input_io_event_source, "bus-input");
|
|
} else
|
|
r = sd_event_source_set_io_fd(bus->input_io_event_source, bus->input_fd);
|
|
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (bus->output_fd != bus->input_fd) {
|
|
assert(bus->output_fd >= 0);
|
|
|
|
if (!bus->output_io_event_source) {
|
|
r = sd_event_add_io(bus->event, &bus->output_io_event_source, bus->output_fd, 0, io_callback, bus);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_event_source_set_priority(bus->output_io_event_source, bus->event_priority);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_event_source_set_description(bus->input_io_event_source, "bus-output");
|
|
} else
|
|
r = sd_event_source_set_io_fd(bus->output_io_event_source, bus->output_fd);
|
|
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void detach_io_events(sd_bus *bus) {
|
|
assert(bus);
|
|
|
|
if (bus->input_io_event_source) {
|
|
sd_event_source_set_enabled(bus->input_io_event_source, SD_EVENT_OFF);
|
|
bus->input_io_event_source = sd_event_source_unref(bus->input_io_event_source);
|
|
}
|
|
|
|
if (bus->output_io_event_source) {
|
|
sd_event_source_set_enabled(bus->output_io_event_source, SD_EVENT_OFF);
|
|
bus->output_io_event_source = sd_event_source_unref(bus->output_io_event_source);
|
|
}
|
|
}
|
|
|
|
_public_ int sd_bus_attach_event(sd_bus *bus, sd_event *event, int priority) {
|
|
int r;
|
|
|
|
assert_return(bus, -EINVAL);
|
|
assert_return(!bus->event, -EBUSY);
|
|
|
|
assert(!bus->input_io_event_source);
|
|
assert(!bus->output_io_event_source);
|
|
assert(!bus->time_event_source);
|
|
|
|
if (event)
|
|
bus->event = sd_event_ref(event);
|
|
else {
|
|
r = sd_event_default(&bus->event);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
bus->event_priority = priority;
|
|
|
|
r = sd_event_add_time(bus->event, &bus->time_event_source, CLOCK_MONOTONIC, 0, 0, time_callback, bus);
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
r = sd_event_source_set_priority(bus->time_event_source, priority);
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
r = sd_event_source_set_description(bus->time_event_source, "bus-time");
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
r = sd_event_add_exit(bus->event, &bus->quit_event_source, quit_callback, bus);
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
r = sd_event_source_set_description(bus->quit_event_source, "bus-exit");
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
r = attach_io_events(bus);
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
sd_bus_detach_event(bus);
|
|
return r;
|
|
}
|
|
|
|
_public_ int sd_bus_detach_event(sd_bus *bus) {
|
|
assert_return(bus, -EINVAL);
|
|
|
|
if (!bus->event)
|
|
return 0;
|
|
|
|
detach_io_events(bus);
|
|
|
|
if (bus->time_event_source) {
|
|
sd_event_source_set_enabled(bus->time_event_source, SD_EVENT_OFF);
|
|
bus->time_event_source = sd_event_source_unref(bus->time_event_source);
|
|
}
|
|
|
|
if (bus->quit_event_source) {
|
|
sd_event_source_set_enabled(bus->quit_event_source, SD_EVENT_OFF);
|
|
bus->quit_event_source = sd_event_source_unref(bus->quit_event_source);
|
|
}
|
|
|
|
bus->event = sd_event_unref(bus->event);
|
|
return 1;
|
|
}
|
|
|
|
_public_ sd_event* sd_bus_get_event(sd_bus *bus) {
|
|
assert_return(bus, NULL);
|
|
|
|
return bus->event;
|
|
}
|
|
|
|
_public_ sd_bus_message* sd_bus_get_current_message(sd_bus *bus) {
|
|
assert_return(bus, NULL);
|
|
|
|
return bus->current_message;
|
|
}
|
|
|
|
_public_ sd_bus_slot* sd_bus_get_current_slot(sd_bus *bus) {
|
|
assert_return(bus, NULL);
|
|
|
|
return bus->current_slot;
|
|
}
|
|
|
|
_public_ sd_bus_message_handler_t sd_bus_get_current_handler(sd_bus *bus) {
|
|
assert_return(bus, NULL);
|
|
|
|
return bus->current_handler;
|
|
}
|
|
|
|
_public_ void* sd_bus_get_current_userdata(sd_bus *bus) {
|
|
assert_return(bus, NULL);
|
|
|
|
return bus->current_userdata;
|
|
}
|
|
|
|
static int bus_default(int (*bus_open)(sd_bus **), sd_bus **default_bus, sd_bus **ret) {
|
|
sd_bus *b = NULL;
|
|
int r;
|
|
|
|
assert(bus_open);
|
|
assert(default_bus);
|
|
|
|
if (!ret)
|
|
return !!*default_bus;
|
|
|
|
if (*default_bus) {
|
|
*ret = sd_bus_ref(*default_bus);
|
|
return 0;
|
|
}
|
|
|
|
r = bus_open(&b);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
b->default_bus_ptr = default_bus;
|
|
b->tid = gettid();
|
|
*default_bus = b;
|
|
|
|
*ret = b;
|
|
return 1;
|
|
}
|
|
|
|
_public_ int sd_bus_default_system(sd_bus **ret) {
|
|
static thread_local sd_bus *default_system_bus = NULL;
|
|
|
|
return bus_default(sd_bus_open_system, &default_system_bus, ret);
|
|
}
|
|
|
|
_public_ int sd_bus_default_user(sd_bus **ret) {
|
|
static thread_local sd_bus *default_user_bus = NULL;
|
|
|
|
return bus_default(sd_bus_open_user, &default_user_bus, ret);
|
|
}
|
|
|
|
_public_ int sd_bus_default(sd_bus **ret) {
|
|
|
|
const char *e;
|
|
|
|
/* Let's try our best to reuse another cached connection. If
|
|
* the starter bus type is set, connect via our normal
|
|
* connection logic, ignoring $DBUS_STARTER_ADDRESS, so that
|
|
* we can share the connection with the user/system default
|
|
* bus. */
|
|
|
|
e = secure_getenv("DBUS_STARTER_BUS_TYPE");
|
|
if (e) {
|
|
if (streq(e, "system"))
|
|
return sd_bus_default_system(ret);
|
|
else if (STR_IN_SET(e, "user", "session"))
|
|
return sd_bus_default_user(ret);
|
|
}
|
|
|
|
/* No type is specified, so we have not other option than to
|
|
* use the starter address if it is set. */
|
|
|
|
e = secure_getenv("DBUS_STARTER_ADDRESS");
|
|
if (e) {
|
|
static thread_local sd_bus *default_starter_bus = NULL;
|
|
|
|
return bus_default(sd_bus_open, &default_starter_bus, ret);
|
|
}
|
|
|
|
/* Finally, if nothing is set use the cached connection for
|
|
* the right scope */
|
|
|
|
if (cg_pid_get_owner_uid(0, NULL) >= 0)
|
|
return sd_bus_default_user(ret);
|
|
else
|
|
return sd_bus_default_system(ret);
|
|
}
|
|
|
|
_public_ int sd_bus_get_tid(sd_bus *b, pid_t *tid) {
|
|
assert_return(b, -EINVAL);
|
|
assert_return(tid, -EINVAL);
|
|
assert_return(!bus_pid_changed(b), -ECHILD);
|
|
|
|
if (b->tid != 0) {
|
|
*tid = b->tid;
|
|
return 0;
|
|
}
|
|
|
|
if (b->event)
|
|
return sd_event_get_tid(b->event, tid);
|
|
|
|
return -ENXIO;
|
|
}
|
|
|
|
_public_ int sd_bus_path_encode(const char *prefix, const char *external_id, char **ret_path) {
|
|
_cleanup_free_ char *e = NULL;
|
|
char *ret;
|
|
|
|
assert_return(object_path_is_valid(prefix), -EINVAL);
|
|
assert_return(external_id, -EINVAL);
|
|
assert_return(ret_path, -EINVAL);
|
|
|
|
e = bus_label_escape(external_id);
|
|
if (!e)
|
|
return -ENOMEM;
|
|
|
|
ret = strjoin(prefix, "/", e, NULL);
|
|
if (!ret)
|
|
return -ENOMEM;
|
|
|
|
*ret_path = ret;
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_bus_path_decode(const char *path, const char *prefix, char **external_id) {
|
|
const char *e;
|
|
char *ret;
|
|
|
|
assert_return(object_path_is_valid(path), -EINVAL);
|
|
assert_return(object_path_is_valid(prefix), -EINVAL);
|
|
assert_return(external_id, -EINVAL);
|
|
|
|
e = object_path_startswith(path, prefix);
|
|
if (!e) {
|
|
*external_id = NULL;
|
|
return 0;
|
|
}
|
|
|
|
ret = bus_label_unescape(e);
|
|
if (!ret)
|
|
return -ENOMEM;
|
|
|
|
*external_id = ret;
|
|
return 1;
|
|
}
|
|
|
|
_public_ int sd_bus_try_close(sd_bus *bus) {
|
|
int r;
|
|
|
|
assert_return(bus, -EINVAL);
|
|
assert_return(!bus_pid_changed(bus), -ECHILD);
|
|
|
|
if (!bus->is_kernel)
|
|
return -EOPNOTSUPP;
|
|
|
|
if (!BUS_IS_OPEN(bus->state))
|
|
return -ENOTCONN;
|
|
|
|
if (bus->rqueue_size > 0)
|
|
return -EBUSY;
|
|
|
|
if (bus->wqueue_size > 0)
|
|
return -EBUSY;
|
|
|
|
r = bus_kernel_try_close(bus);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
sd_bus_close(bus);
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_bus_get_description(sd_bus *bus, const char **description) {
|
|
assert_return(bus, -EINVAL);
|
|
assert_return(description, -EINVAL);
|
|
assert_return(bus->description, -ENXIO);
|
|
assert_return(!bus_pid_changed(bus), -ECHILD);
|
|
|
|
*description = bus->description;
|
|
return 0;
|
|
}
|
|
|
|
int bus_get_root_path(sd_bus *bus) {
|
|
int r;
|
|
|
|
if (bus->cgroup_root)
|
|
return 0;
|
|
|
|
r = cg_get_root_path(&bus->cgroup_root);
|
|
if (r == -ENOENT) {
|
|
bus->cgroup_root = strdup("/");
|
|
if (!bus->cgroup_root)
|
|
return -ENOMEM;
|
|
|
|
r = 0;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
_public_ int sd_bus_get_scope(sd_bus *bus, const char **scope) {
|
|
int r;
|
|
|
|
assert_return(bus, -EINVAL);
|
|
assert_return(scope, -EINVAL);
|
|
assert_return(!bus_pid_changed(bus), -ECHILD);
|
|
|
|
if (bus->is_kernel) {
|
|
_cleanup_free_ char *n = NULL;
|
|
const char *dash;
|
|
|
|
r = bus_kernel_get_bus_name(bus, &n);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (streq(n, "0-system")) {
|
|
*scope = "system";
|
|
return 0;
|
|
}
|
|
|
|
dash = strchr(n, '-');
|
|
if (streq_ptr(dash, "-user")) {
|
|
*scope = "user";
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if (bus->is_user) {
|
|
*scope = "user";
|
|
return 0;
|
|
}
|
|
|
|
if (bus->is_system) {
|
|
*scope = "system";
|
|
return 0;
|
|
}
|
|
|
|
return -ENODATA;
|
|
}
|
|
|
|
_public_ int sd_bus_get_address(sd_bus *bus, const char **address) {
|
|
|
|
assert_return(bus, -EINVAL);
|
|
assert_return(address, -EINVAL);
|
|
assert_return(!bus_pid_changed(bus), -ECHILD);
|
|
|
|
if (bus->address) {
|
|
*address = bus->address;
|
|
return 0;
|
|
}
|
|
|
|
return -ENODATA;
|
|
}
|
|
|
|
_public_ int sd_bus_get_creds_mask(sd_bus *bus, uint64_t *mask) {
|
|
assert_return(bus, -EINVAL);
|
|
assert_return(mask, -EINVAL);
|
|
assert_return(!bus_pid_changed(bus), -ECHILD);
|
|
|
|
*mask = bus->creds_mask;
|
|
return 0;
|
|
}
|
|
|
|
_public_ int sd_bus_is_bus_client(sd_bus *bus) {
|
|
assert_return(bus, -EINVAL);
|
|
assert_return(!bus_pid_changed(bus), -ECHILD);
|
|
|
|
return bus->bus_client;
|
|
}
|
|
|
|
_public_ int sd_bus_is_server(sd_bus *bus) {
|
|
assert_return(bus, -EINVAL);
|
|
assert_return(!bus_pid_changed(bus), -ECHILD);
|
|
|
|
return bus->is_server;
|
|
}
|
|
|
|
_public_ int sd_bus_is_anonymous(sd_bus *bus) {
|
|
assert_return(bus, -EINVAL);
|
|
assert_return(!bus_pid_changed(bus), -ECHILD);
|
|
|
|
return bus->anonymous_auth;
|
|
}
|
|
|
|
_public_ int sd_bus_is_trusted(sd_bus *bus) {
|
|
assert_return(bus, -EINVAL);
|
|
assert_return(!bus_pid_changed(bus), -ECHILD);
|
|
|
|
return bus->trusted;
|
|
}
|
|
|
|
_public_ int sd_bus_is_monitor(sd_bus *bus) {
|
|
assert_return(bus, -EINVAL);
|
|
assert_return(!bus_pid_changed(bus), -ECHILD);
|
|
|
|
return !!(bus->hello_flags & KDBUS_HELLO_MONITOR);
|
|
}
|