+++ /dev/null
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright 2013 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <endian.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <netdb.h>
-#include <poll.h>
-#include <sys/mman.h>
-#include <pthread.h>
-
-#include "util.h"
-#include "macro.h"
-#include "strv.h"
-#include "missing.h"
-#include "def.h"
-#include "cgroup-util.h"
-#include "bus-label.h"
-
-#include "sd-bus.h"
-#include "bus-internal.h"
-#include "bus-message.h"
-#include "bus-type.h"
-#include "bus-socket.h"
-#include "bus-kernel.h"
-#include "bus-control.h"
-#include "bus-objects.h"
-#include "bus-util.h"
-#include "bus-container.h"
-#include "bus-protocol.h"
-#include "bus-track.h"
-#include "bus-slot.h"
-
-static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec);
-static int attach_io_events(sd_bus *b);
-static void detach_io_events(sd_bus *b);
-
-static void bus_close_fds(sd_bus *b) {
- assert(b);
-
- detach_io_events(b);
-
- if (b->input_fd >= 0)
- safe_close(b->input_fd);
-
- if (b->output_fd >= 0 && b->output_fd != b->input_fd)
- safe_close(b->output_fd);
-
- b->input_fd = b->output_fd = -1;
-}
-
-static void bus_reset_queues(sd_bus *b) {
- assert(b);
-
- while (b->rqueue_size > 0)
- sd_bus_message_unref(b->rqueue[--b->rqueue_size]);
-
- free(b->rqueue);
- b->rqueue = NULL;
- b->rqueue_allocated = 0;
-
- while (b->wqueue_size > 0)
- sd_bus_message_unref(b->wqueue[--b->wqueue_size]);
-
- free(b->wqueue);
- b->wqueue = NULL;
- b->wqueue_allocated = 0;
-}
-
-static void bus_free(sd_bus *b) {
- sd_bus_slot *s;
-
- assert(b);
- assert(!b->track_queue);
-
- b->state = BUS_CLOSED;
-
- sd_bus_detach_event(b);
-
- while ((s = b->slots)) {
- /* At this point only floating slots can still be
- * around, because the non-floating ones keep a
- * reference to the bus, and we thus couldn't be
- * destructing right now... We forcibly disconnect the
- * slots here, so that they still can be referenced by
- * apps, but are dead. */
-
- assert(s->floating);
- bus_slot_disconnect(s);
- sd_bus_slot_unref(s);
- }
-
- if (b->default_bus_ptr)
- *b->default_bus_ptr = NULL;
-
- bus_close_fds(b);
-
- if (b->kdbus_buffer)
- munmap(b->kdbus_buffer, KDBUS_POOL_SIZE);
-
- free(b->rbuffer);
- free(b->unique_name);
- free(b->auth_buffer);
- free(b->address);
- free(b->kernel);
- free(b->machine);
- free(b->fake_label);
- free(b->cgroup_root);
- free(b->description);
-
- free(b->exec_path);
- strv_free(b->exec_argv);
-
- close_many(b->fds, b->n_fds);
- free(b->fds);
-
- bus_reset_queues(b);
-
- ordered_hashmap_free_free(b->reply_callbacks);
- prioq_free(b->reply_callbacks_prioq);
-
- assert(b->match_callbacks.type == BUS_MATCH_ROOT);
- bus_match_free(&b->match_callbacks);
-
- hashmap_free_free(b->vtable_methods);
- hashmap_free_free(b->vtable_properties);
-
- assert(hashmap_isempty(b->nodes));
- hashmap_free(b->nodes);
-
- bus_kernel_flush_memfd(b);
-
- assert_se(pthread_mutex_destroy(&b->memfd_cache_mutex) == 0);
-
- free(b);
-}
-
-_public_ int sd_bus_new(sd_bus **ret) {
- sd_bus *r;
-
- assert_return(ret, -EINVAL);
-
- r = new0(sd_bus, 1);
- if (!r)
- return -ENOMEM;
-
- r->n_ref = REFCNT_INIT;
- r->input_fd = r->output_fd = -1;
- r->message_version = 1;
- r->creds_mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME;
- r->hello_flags |= KDBUS_HELLO_ACCEPT_FD;
- r->attach_flags |= KDBUS_ATTACH_NAMES;
- r->original_pid = getpid();
-
- assert_se(pthread_mutex_init(&r->memfd_cache_mutex, NULL) == 0);
-
- /* We guarantee that wqueue always has space for at least one
- * entry */
- if (!GREEDY_REALLOC(r->wqueue, r->wqueue_allocated, 1)) {
- free(r);
- return -ENOMEM;
- }
-
- *ret = r;
- return 0;
-}
-
-_public_ int sd_bus_set_address(sd_bus *bus, const char *address) {
- char *a;
-
- assert_return(bus, -EINVAL);
- assert_return(bus->state == BUS_UNSET, -EPERM);
- assert_return(address, -EINVAL);
- assert_return(!bus_pid_changed(bus), -ECHILD);
-
- a = strdup(address);
- if (!a)
- return -ENOMEM;
-
- free(bus->address);
- bus->address = a;
-
- return 0;
-}
-
-_public_ int sd_bus_set_fd(sd_bus *bus, int input_fd, int output_fd) {
- assert_return(bus, -EINVAL);
- assert_return(bus->state == BUS_UNSET, -EPERM);
- assert_return(input_fd >= 0, -EINVAL);
- assert_return(output_fd >= 0, -EINVAL);
- assert_return(!bus_pid_changed(bus), -ECHILD);
-
- bus->input_fd = input_fd;
- bus->output_fd = output_fd;
- return 0;
-}
-
-_public_ int sd_bus_set_exec(sd_bus *bus, const char *path, char *const argv[]) {
- char *p, **a;
-
- assert_return(bus, -EINVAL);
- assert_return(bus->state == BUS_UNSET, -EPERM);
- assert_return(path, -EINVAL);
- assert_return(!strv_isempty(argv), -EINVAL);
- assert_return(!bus_pid_changed(bus), -ECHILD);
-
- p = strdup(path);
- if (!p)
- return -ENOMEM;
-
- a = strv_copy(argv);
- if (!a) {
- free(p);
- return -ENOMEM;
- }
-
- free(bus->exec_path);
- strv_free(bus->exec_argv);
-
- bus->exec_path = p;
- bus->exec_argv = a;
-
- return 0;
-}
-
-_public_ int sd_bus_set_bus_client(sd_bus *bus, int b) {
- assert_return(bus, -EINVAL);
- assert_return(bus->state == BUS_UNSET, -EPERM);
- assert_return(!bus_pid_changed(bus), -ECHILD);
-
- bus->bus_client = !!b;
- return 0;
-}
-
-_public_ int sd_bus_set_monitor(sd_bus *bus, int b) {
- assert_return(bus, -EINVAL);
- assert_return(bus->state == BUS_UNSET, -EPERM);
- assert_return(!bus_pid_changed(bus), -ECHILD);
-
- SET_FLAG(bus->hello_flags, KDBUS_HELLO_MONITOR, b);
- return 0;
-}
-
-_public_ int sd_bus_negotiate_fds(sd_bus *bus, int b) {
- assert_return(bus, -EINVAL);
- assert_return(bus->state == BUS_UNSET, -EPERM);
- assert_return(!bus_pid_changed(bus), -ECHILD);
-
- SET_FLAG(bus->hello_flags, KDBUS_HELLO_ACCEPT_FD, b);
- return 0;
-}
-
-_public_ int sd_bus_negotiate_timestamp(sd_bus *bus, int b) {
- uint64_t new_flags;
- assert_return(bus, -EINVAL);
- assert_return(!IN_SET(bus->state, BUS_CLOSING, BUS_CLOSED), -EPERM);
- assert_return(!bus_pid_changed(bus), -ECHILD);
-
- new_flags = bus->attach_flags;
- SET_FLAG(new_flags, KDBUS_ATTACH_TIMESTAMP, b);
-
- if (bus->attach_flags == new_flags)
- return 0;
-
- bus->attach_flags = new_flags;
- if (bus->state != BUS_UNSET && bus->is_kernel)
- bus_kernel_realize_attach_flags(bus);
-
- return 0;
-}
-
-_public_ int sd_bus_negotiate_creds(sd_bus *bus, int b, uint64_t mask) {
- uint64_t new_flags;
-
- assert_return(bus, -EINVAL);
- assert_return(mask <= _SD_BUS_CREDS_ALL, -EINVAL);
- assert_return(!IN_SET(bus->state, BUS_CLOSING, BUS_CLOSED), -EPERM);
- assert_return(!bus_pid_changed(bus), -ECHILD);
-
- if (b)
- bus->creds_mask |= mask;
- else
- bus->creds_mask &= ~mask;
-
- /* The well knowns we need unconditionally, so that matches can work */
- bus->creds_mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME;
-
- /* Make sure we don't lose the timestamp flag */
- new_flags = (bus->attach_flags & KDBUS_ATTACH_TIMESTAMP) | attach_flags_to_kdbus(bus->creds_mask);
- if (bus->attach_flags == new_flags)
- return 0;
-
- bus->attach_flags = new_flags;
- if (bus->state != BUS_UNSET && bus->is_kernel)
- bus_kernel_realize_attach_flags(bus);
-
- return 0;
-}
-
-_public_ int sd_bus_set_server(sd_bus *bus, int b, sd_id128_t server_id) {
- assert_return(bus, -EINVAL);
- assert_return(b || sd_id128_equal(server_id, SD_ID128_NULL), -EINVAL);
- assert_return(bus->state == BUS_UNSET, -EPERM);
- assert_return(!bus_pid_changed(bus), -ECHILD);
-
- bus->is_server = !!b;
- bus->server_id = server_id;
- return 0;
-}
-
-_public_ int sd_bus_set_anonymous(sd_bus *bus, int b) {
- assert_return(bus, -EINVAL);
- assert_return(bus->state == BUS_UNSET, -EPERM);
- assert_return(!bus_pid_changed(bus), -ECHILD);
-
- bus->anonymous_auth = !!b;
- return 0;
-}
-
-_public_ int sd_bus_set_trusted(sd_bus *bus, int b) {
- assert_return(bus, -EINVAL);
- assert_return(bus->state == BUS_UNSET, -EPERM);
- assert_return(!bus_pid_changed(bus), -ECHILD);
-
- bus->trusted = !!b;
- return 0;
-}
-
-_public_ int sd_bus_set_description(sd_bus *bus, const char *description) {
- assert_return(bus, -EINVAL);
- assert_return(bus->state == BUS_UNSET, -EPERM);
- assert_return(!bus_pid_changed(bus), -ECHILD);
-
- return free_and_strdup(&bus->description, description);
-}
-
-_public_ int sd_bus_set_allow_interactive_authorization(sd_bus *bus, int b) {
- assert_return(bus, -EINVAL);
- assert_return(!bus_pid_changed(bus), -ECHILD);
-
- bus->allow_interactive_authorization = !!b;
- return 0;
-}
-
-_public_ int sd_bus_get_allow_interactive_authorization(sd_bus *bus) {
- assert_return(bus, -EINVAL);
- assert_return(!bus_pid_changed(bus), -ECHILD);
-
- return bus->allow_interactive_authorization;
-}
-
-static int hello_callback(sd_bus *bus, sd_bus_message *reply, void *userdata, sd_bus_error *error) {
- const char *s;
- int r;
-
- assert(bus);
- assert(bus->state == BUS_HELLO || bus->state == BUS_CLOSING);
- assert(reply);
-
- r = sd_bus_message_get_errno(reply);
- if (r > 0)
- return -r;
-
- r = sd_bus_message_read(reply, "s", &s);
- if (r < 0)
- return r;
-
- if (!service_name_is_valid(s) || s[0] != ':')
- return -EBADMSG;
-
- bus->unique_name = strdup(s);
- if (!bus->unique_name)
- return -ENOMEM;
-
- if (bus->state == BUS_HELLO)
- bus->state = BUS_RUNNING;
-
- return 1;
-}
-
-static int bus_send_hello(sd_bus *bus) {
- _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
- int r;
-
- assert(bus);
-
- if (!bus->bus_client || bus->is_kernel)
- return 0;
-
- r = sd_bus_message_new_method_call(
- bus,
- &m,
- "org.freedesktop.DBus",
- "/org/freedesktop/DBus",
- "org.freedesktop.DBus",
- "Hello");
- if (r < 0)
- return r;
-
- return sd_bus_call_async(bus, NULL, m, hello_callback, NULL, 0);
-}
-
-int bus_start_running(sd_bus *bus) {
- assert(bus);
-
- if (bus->bus_client && !bus->is_kernel) {
- bus->state = BUS_HELLO;
- return 1;
- }
-
- 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++;
-
- *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;
-
- free(b->kernel);
- b->kernel = strdup("/sys/fs/kdbus/0-system/bus");
- if (!b->kernel)
- return -ENOMEM;
-
- return 0;
-}
-
-static void bus_reset_parsed_address(sd_bus *b) {
- assert(b);
-
- zero(b->sockaddr);
- b->sockaddr_size = 0;
- strv_free(b->exec_argv);
- free(b->exec_path);
- b->exec_path = NULL;
- b->exec_argv = NULL;
- b->server_id = SD_ID128_NULL;
- free(b->kernel);
- b->kernel = NULL;
- free(b->machine);
- b->machine = NULL;
- 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);
-
- return sd_bus_set_address(b, DEFAULT_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 (e) {
- _cleanup_free_ char *ee = NULL;
-
- ee = bus_address_escape(e);
- if (!ee)
- return -ENOMEM;
-
-#ifdef ENABLE_KDBUS
- (void) asprintf(&b->address, KERNEL_USER_BUS_ADDRESS_FMT ";" UNIX_USER_BUS_ADDRESS_FMT, getuid(), ee);
-#else
- (void) asprintf(&b->address, UNIX_USER_BUS_ADDRESS_FMT, ee);
-#endif
- } else {
-#ifdef ENABLE_KDBUS
- (void) asprintf(&b->address, KERNEL_USER_BUS_ADDRESS_FMT, getuid());
-#else
- return -ECONNREFUSED;
-#endif
- }
-
- 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;
-
-#ifdef ENABLE_KDBUS
- b->address = strjoin("x-machine-kernel:machine=", e, ";x-machine-unix:machine=", e, NULL);
-#else
- b->address = strjoin("x-machine-unix:machine=", e, NULL);
-#endif
- 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. */
-}
-
-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(bus, -EINVAL);
- assert_return(m, -EINVAL);
- 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(bus, -EINVAL);
- assert_return(m, -EINVAL);
- 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(bus, -EINVAL);
- 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);
- 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;
-
- assert_return(bus, -EINVAL);
- 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(!bus_error_is_dirty(error), -EINVAL);
- 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 = bus_ensure_running(bus);
- if (r < 0)
- return r;
-
- i = bus->rqueue_size;
-
- r = bus_seal_message(bus, m, usec);
- if (r < 0)
- return r;
-
- r = bus_remarshal_message(bus, &m);
- if (r < 0)
- return r;
-
- r = bus_send_internal(bus, m, &cookie, true);
- if (r < 0)
- return r;
-
- 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--;
-
- 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.");
-
- } else if (incoming->header->type == SD_BUS_MESSAGE_METHOD_ERROR)
- r = sd_bus_error_copy(error, &incoming->error);
- else
- r = -EIO;
-
- sd_bus_message_unref(incoming);
- return r;
-
- } 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);
- return -ELOOP;
- }
-
- /* 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);
- return -ECONNRESET;
- }
-
- return r;
- }
- if (r > 0)
- continue;
-
- if (timeout > 0) {
- usec_t n;
-
- n = now(CLOCK_MONOTONIC);
- if (n >= timeout)
- return -ETIMEDOUT;
-
- left = timeout - n;
- } else
- left = (uint64_t) -1;
-
- r = bus_poll(bus, true, left);
- if (r < 0)
- return r;
- if (r == 0)
- return -ETIMEDOUT;
-
- r = dispatch_wqueue(bus);
- if (r < 0) {
- if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) {
- bus_enter_closing(bus);
- return -ECONNRESET;
- }
-
- return 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(bus, 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(bus, 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(bus, 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("Got 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));
-
- 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(bus, 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) {
-
- 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;
- }
-
- 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;
-}
-
-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;
-}
-
-int sd_bus_is_bus_client(sd_bus *bus) {
- assert_return(bus, -EINVAL);
- assert_return(!bus_pid_changed(bus), -ECHILD);
-
- return bus->bus_client;
-}
-
-int sd_bus_is_server(sd_bus *bus) {
- assert_return(bus, -EINVAL);
- assert_return(!bus_pid_changed(bus), -ECHILD);
-
- return bus->is_server;
-}
-
-int sd_bus_is_anonymous(sd_bus *bus) {
- assert_return(bus, -EINVAL);
- assert_return(!bus_pid_changed(bus), -ECHILD);
-
- return bus->anonymous_auth;
-}
-
-int sd_bus_is_trusted(sd_bus *bus) {
- assert_return(bus, -EINVAL);
- assert_return(!bus_pid_changed(bus), -ECHILD);
-
- return bus->trusted;
-}
-
-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);
-}
~ianmdlvl / elogind.git / blobdiff