/* SPDX-License-Identifier: LGPL-2.1+ */
/***
- 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>
static void bus_detach_inotify_event(sd_bus *b);
static thread_local sd_bus *default_system_bus = NULL;
-#if 0 /// UNNEEDED by elogind
static thread_local sd_bus *default_user_bus = NULL;
-#endif // 0
static thread_local sd_bus *default_starter_bus = NULL;
static sd_bus **bus_choose_default(int (**bus_open)(sd_bus **)) {
b->wqueue_allocated = 0;
}
-static void bus_free(sd_bus *b) {
+static sd_bus* bus_free(sd_bus *b) {
sd_bus_slot *s;
assert(b);
assert_se(pthread_mutex_destroy(&b->memfd_cache_mutex) == 0);
- free(b);
+ return mfree(b);
}
+DEFINE_TRIVIAL_CLEANUP_FUNC(sd_bus*, bus_free);
+
_public_ int sd_bus_new(sd_bus **ret) {
- sd_bus *r;
+ _cleanup_free_ sd_bus *b = NULL;
assert_return(ret, -EINVAL);
- r = new0(sd_bus, 1);
- if (!r)
+ b = new0(sd_bus, 1);
+ if (!b)
return -ENOMEM;
- r->n_ref = REFCNT_INIT;
- r->input_fd = r->output_fd = -1;
- r->inotify_fd = -1;
- r->message_version = 1;
- r->creds_mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME;
- r->accept_fd = true;
- r->original_pid = getpid_cached();
- r->n_groups = (size_t) -1;
-
- 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);
+ b->n_ref = REFCNT_INIT;
+ b->input_fd = b->output_fd = -1;
+ b->inotify_fd = -1;
+ b->message_version = 1;
+ b->creds_mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME;
+ b->accept_fd = true;
+ b->original_pid = getpid_cached();
+ b->n_groups = (size_t) -1;
+
+ assert_se(pthread_mutex_init(&b->memfd_cache_mutex, NULL) == 0);
+
+ /* We guarantee that wqueue always has space for at least one entry */
+ if (!GREEDY_REALLOC(b->wqueue, b->wqueue_allocated, 1))
return -ENOMEM;
- }
- *ret = r;
+ *ret = TAKE_PTR(b);
return 0;
}
_public_ int sd_bus_set_address(sd_bus *bus, const char *address) {
- char *a;
-
assert_return(bus, -EINVAL);
assert_return(bus = bus_resolve(bus), -ENOPKG);
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_and_replace(bus->address, a);
-
- return 0;
+ return free_and_strdup(&bus->address, address);
}
_public_ int sd_bus_set_fd(sd_bus *bus, int input_fd, int output_fd) {
}
_public_ int sd_bus_set_exec(sd_bus *bus, const char *path, char *const argv[]) {
- char *p, **a;
+ _cleanup_strv_free_ char **a = NULL;
+ int r;
assert_return(bus, -EINVAL);
assert_return(bus = bus_resolve(bus), -ENOPKG);
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);
+ if (!a)
return -ENOMEM;
- }
- free_and_replace(bus->exec_path, p);
-
- strv_free(bus->exec_argv);
- bus->exec_argv = a;
+ r = free_and_strdup(&bus->exec_path, path);
+ if (r < 0)
+ return r;
- return 0;
+ return strv_free_and_replace(bus->exec_argv, a);
}
_public_ int sd_bus_set_bus_client(sd_bus *bus, int b) {
/* Insert at the very front */
memmove(bus->rqueue + 1, bus->rqueue, sizeof(sd_bus_message*) * bus->rqueue_size);
- bus->rqueue[0] = m;
- m = NULL;
+ bus->rqueue[0] = TAKE_PTR(m);
bus->rqueue_size++;
return 0;
static int hello_callback(sd_bus_message *reply, void *userdata, sd_bus_error *error) {
const char *s;
- char *t;
sd_bus *bus;
int r;
if (!service_name_is_valid(s) || s[0] != ':')
return -EBADMSG;
- t = strdup(s);
- if (!t)
- return -ENOMEM;
-
- free_and_replace(bus->unique_name, t);
+ r = free_and_strdup(&bus->unique_name, s);
+ if (r < 0)
+ return r;
if (bus->state == BUS_HELLO) {
bus_set_state(bus, BUS_RUNNING);
return bus_send_hello(bus);
}
-_public_ int sd_bus_open(sd_bus **ret) {
+_public_ int sd_bus_open_with_description(sd_bus **ret, const char *description) {
const char *e;
- sd_bus *b;
+ _cleanup_(bus_freep) sd_bus *b = NULL;
int r;
assert_return(ret, -EINVAL);
e = secure_getenv("DBUS_STARTER_BUS_TYPE");
if (e) {
if (streq(e, "system"))
- return sd_bus_open_system(ret);
+ return sd_bus_open_system_with_description(ret, description);
#if 0 /// elogind does not support systemd user instances
else if (STR_IN_SET(e, "session", "user"))
- return sd_bus_open_user(ret);
#endif // 0
+ return sd_bus_open_user_with_description(ret, description);
}
e = secure_getenv("DBUS_STARTER_ADDRESS");
if (!e) {
#if 0 /// elogind does not support systemd user instances
if (cg_pid_get_owner_uid(0, NULL) >= 0)
- return sd_bus_open_user(ret);
+ return sd_bus_open_user_with_description(ret, description);
else
#endif // 0
- return sd_bus_open_system(ret);
+ return sd_bus_open_system_with_description(ret, description);
}
r = sd_bus_new(&b);
r = sd_bus_set_address(b, e);
if (r < 0)
- goto fail;
+ return r;
b->bus_client = true;
r = sd_bus_start(b);
if (r < 0)
- goto fail;
+ return r;
- *ret = b;
+ *ret = TAKE_PTR(b);
return 0;
+}
-fail:
- bus_free(b);
- return r;
+_public_ int sd_bus_open(sd_bus **ret) {
+ return sd_bus_open_with_description(ret, NULL);
}
int bus_set_address_system(sd_bus *b) {
return sd_bus_set_address(b, DEFAULT_SYSTEM_BUS_ADDRESS);
}
-_public_ int sd_bus_open_system(sd_bus **ret) {
- sd_bus *b;
+_public_ int sd_bus_open_system_with_description(sd_bus **ret, const char *description) {
+ _cleanup_(bus_freep) sd_bus *b = NULL;
int r;
assert_return(ret, -EINVAL);
if (r < 0)
return r;
+ if (description) {
+ r = sd_bus_set_description(b, description);
+ if (r < 0)
+ return r;
+ }
+
r = bus_set_address_system(b);
if (r < 0)
- goto fail;
+ return r;
b->bus_client = true;
b->is_system = true;
r = sd_bus_start(b);
if (r < 0)
- goto fail;
+ return r;
- *ret = b;
+ *ret = TAKE_PTR(b);
return 0;
+}
-fail:
- bus_free(b);
- return r;
+_public_ int sd_bus_open_system(sd_bus **ret) {
+ return sd_bus_open_system_with_description(ret, NULL);
}
#if 0 /// elogind can not open/use a user bus
if (asprintf(&s, DEFAULT_USER_BUS_ADDRESS_FMT, ee) < 0)
return -ENOMEM;
- b->address = s;
- s = NULL;
+ b->address = TAKE_PTR(s);
return 0;
}
#endif // 0
-_public_ int sd_bus_open_user(sd_bus **ret) {
+_public_ int sd_bus_open_user_with_description(sd_bus **ret, const char *description) {
#if 0 /// elogind does not support user buses
- sd_bus *b;
+ _cleanup_(bus_freep) sd_bus *b = NULL;
int r;
assert_return(ret, -EINVAL);
if (r < 0)
return r;
+ if (description) {
+ r = sd_bus_set_description(b, description);
+ if (r < 0)
+ return r;
+ }
+
r = bus_set_address_user(b);
if (r < 0)
- goto fail;
+ return r;
b->bus_client = true;
b->is_user = true;
r = sd_bus_start(b);
if (r < 0)
- goto fail;
+ return r;
- *ret = b;
+ *ret = TAKE_PTR(b);
return 0;
+}
-fail:
- bus_free(b);
- return r;
+_public_ int sd_bus_open_user(sd_bus **ret) {
+ return sd_bus_open_user_with_description(ret, NULL);
#else
return sd_bus_open_system(ret);
#endif // 0
/* 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)) {
+ if (!in_charset(m, DIGITS) && machine_name_is_valid(m)) {
char *t;
/* Cut out the host part */
if (!a)
return -ENOMEM;
- free_and_replace(b->address, a);
-
- return 0;
- }
+ return free_and_replace(b->address, a);
+}
_public_ int sd_bus_open_system_remote(sd_bus **ret, const char *host) {
- sd_bus *bus;
+ _cleanup_(bus_freep) sd_bus *b = NULL;
int r;
assert_return(host, -EINVAL);
assert_return(ret, -EINVAL);
- r = sd_bus_new(&bus);
+ r = sd_bus_new(&b);
if (r < 0)
return r;
- r = bus_set_address_system_remote(bus, host);
+ r = bus_set_address_system_remote(b, host);
if (r < 0)
- goto fail;
+ return r;
- bus->bus_client = true;
- bus->trusted = false;
- bus->is_system = true;
- bus->is_local = false;
+ b->bus_client = true;
+ b->trusted = false;
+ b->is_system = true;
+ b->is_local = false;
- r = sd_bus_start(bus);
+ r = sd_bus_start(b);
if (r < 0)
- goto fail;
+ return r;
- *ret = bus;
+ *ret = TAKE_PTR(b);
return 0;
-
-fail:
- bus_free(bus);
- return r;
}
int bus_set_address_system_machine(sd_bus *b, const char *machine) {
if (!a)
return -ENOMEM;
- free_and_replace(b->address, a);
-
- return 0;
+ return free_and_replace(b->address, a);
}
_public_ int sd_bus_open_system_machine(sd_bus **ret, const char *machine) {
- sd_bus *bus;
+ _cleanup_(bus_freep) sd_bus *b = NULL;
int r;
assert_return(machine, -EINVAL);
assert_return(ret, -EINVAL);
assert_return(machine_name_is_valid(machine), -EINVAL);
- r = sd_bus_new(&bus);
+ r = sd_bus_new(&b);
if (r < 0)
return r;
- r = bus_set_address_system_machine(bus, machine);
+ r = bus_set_address_system_machine(b, machine);
if (r < 0)
- goto fail;
+ return r;
- bus->bus_client = true;
- bus->trusted = false;
- bus->is_system = true;
- bus->is_local = false;
+ b->bus_client = true;
+ b->trusted = false;
+ b->is_system = true;
+ b->is_local = false;
- r = sd_bus_start(bus);
+ r = sd_bus_start(b);
if (r < 0)
- goto fail;
+ return r;
- *ret = bus;
+ *ret = TAKE_PTR(b);
return 0;
-
-fail:
- bus_free(bus);
- return r;
}
_public_ void sd_bus_close(sd_bus *bus) {
-
if (!bus)
return;
if (bus->state == BUS_CLOSED)
}
_public_ sd_bus* sd_bus_flush_close_unref(sd_bus *bus) {
-
if (!bus)
return NULL;
}
_public_ sd_bus *sd_bus_ref(sd_bus *bus) {
-
if (!bus)
return NULL;
if (i > 0)
return NULL;
- bus_free(bus);
- return NULL;
+ return bus_free(bus);
}
_public_ int sd_bus_is_open(sd_bus *bus) {
-
assert_return(bus, -EINVAL);
assert_return(bus = bus_resolve(bus), -ENOPKG);
assert_return(!bus_pid_changed(bus), -ECHILD);
if (r < 0)
return r;
- *ret = m;
- m = NULL;
+ *ret = TAKE_PTR(m);
+
return 1;
}
bus->exit_triggered = true;
(void) bus_exit_now(bus);
- if (ret) {
- *ret = m;
- m = NULL;
- }
+ if (ret)
+ *ret = TAKE_PTR(m);
r = 1;
goto finish;
}
- if (asynchronous)
+ if (asynchronous) {
r = bus_add_match_internal_async(bus,
&s->match_callback.install_slot,
s->match_callback.match_string,
add_match_callback,
s);
- else
+
+ if (r < 0)
+ return r;
+
+ /* Make the slot of the match call floating now. We need the reference, but we don't
+ * want that this match pins the bus object, hence we first create it non-floating, but
+ * then make it floating. */
+ r = sd_bus_slot_set_floating(s->match_callback.install_slot, true);
+ } else
r = bus_add_match_internal(bus, s->match_callback.match_string);
if (r < 0)
goto finish;
return bus_default(sd_bus_open_system, &default_system_bus, ret);
}
-
_public_ int sd_bus_default_user(sd_bus **ret) {
#if 0 /// elogind does not support user buses
return bus_default(sd_bus_open_user, &default_user_bus, ret);
int (*bus_open)(sd_bus **) = NULL;
sd_bus **busp;
-#if 0 /// elogind does not support systemd units
-#endif // 0
-
-#if 0 /// elogind does not support systemd user instances
-#endif // 0
busp = bus_choose_default(&bus_open);
return bus_default(bus_open, busp, ret);
}
*ret = bus->patch_sender;
return 0;
}
+
+_public_ int sd_bus_get_n_queued_read(sd_bus *bus, uint64_t *ret) {
+ assert_return(bus, -EINVAL);
+ assert_return(bus = bus_resolve(bus), -ENOPKG);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+ assert_return(ret, -EINVAL);
+
+ *ret = bus->rqueue_size;
+ return 0;
+}
+
+_public_ int sd_bus_get_n_queued_write(sd_bus *bus, uint64_t *ret) {
+ assert_return(bus, -EINVAL);
+ assert_return(bus = bus_resolve(bus), -ENOPKG);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+ assert_return(ret, -EINVAL);
+
+ *ret = bus->wqueue_size;
+ return 0;
+}
~ianmdlvl / elogind.git / blobdiff