/* 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>
#include <netdb.h>
#include <poll.h>
#include <pthread.h>
+#include <signal.h>
#include <stdlib.h>
#include <sys/mman.h>
+#include <sys/wait.h>
#include <unistd.h>
#include "sd-bus.h"
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(bus->address);
- 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(bus->exec_path);
- strv_free(bus->exec_argv);
- bus->exec_path = p;
- 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) {
assert_return(bus->state == BUS_UNSET, -EPERM);
assert_return(!bus_pid_changed(bus), -ECHILD);
- bus->is_monitor = b;
+ bus->is_monitor = !!b;
return 0;
}
assert_return(bus->state == BUS_UNSET, -EPERM);
assert_return(!bus_pid_changed(bus), -ECHILD);
- bus->accept_fd = b;
+ bus->accept_fd = !!b;
return 0;
}
/* This is not actually supported by any of our transports these days, but we do honour it for synthetic
* replies, and maybe one day classic D-Bus learns this too */
- bus->attach_timestamp = b;
+ bus->attach_timestamp = !!b;
return 0;
}
assert_return(bus->state == BUS_UNSET, -EPERM);
assert_return(!bus_pid_changed(bus), -ECHILD);
- bus->watch_bind = b;
+ bus->watch_bind = !!b;
return 0;
}
assert_return(bus->state == BUS_UNSET, -EPERM);
assert_return(!bus_pid_changed(bus), -ECHILD);
- bus->connected_signal = b;
+ bus->connected_signal = !!b;
return 0;
}
/* 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;
if (!service_name_is_valid(s) || s[0] != ':')
return -EBADMSG;
- bus->unique_name = strdup(s);
- if (!bus->unique_name)
- return -ENOMEM;
+ r = free_and_strdup(&bus->unique_name, s);
+ if (r < 0)
+ return r;
if (bus->state == BUS_HELLO) {
bus_set_state(bus, BUS_RUNNING);
static int parse_address_key(const char **p, const char *key, char **value) {
size_t l, n = 0, allocated = 0;
+ _cleanup_free_ char *r = NULL;
const char *a;
- char *r = NULL;
assert(p);
assert(*p);
int x, y;
x = unhexchar(a[1]);
- if (x < 0) {
- free(r);
+ if (x < 0)
return x;
- }
y = unhexchar(a[2]);
- if (y < 0) {
- free(r);
+ if (y < 0)
return y;
- }
c = (char) ((x << 4) | y);
a += 3;
*p = a;
- free(*value);
- *value = r;
+ free_and_replace(*value, r);
return 1;
}
return 1;
}
+static void bus_kill_exec(sd_bus *bus) {
+ if (pid_is_valid(bus->busexec_pid) > 0) {
+ sigterm_wait(bus->busexec_pid);
+ bus->busexec_pid = 0;
+ }
+}
+
static int bus_start_address(sd_bus *b) {
int r;
bus_close_io_fds(b);
bus_close_inotify_fd(b);
+ bus_kill_exec(b);
+
/* If you provide multiple different bus-addresses, we
* try all of them in order and use the first one that
* succeeds. */
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);
else if (STR_IN_SET(e, "session", "user"))
- return sd_bus_open_user(ret);
+ return sd_bus_open_user_with_description(ret, description);
}
e = secure_getenv("DBUS_STARTER_ADDRESS");
if (!e) {
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
- 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);
}
int bus_set_address_user(sd_bus *b) {
if (asprintf(&s, DEFAULT_USER_BUS_ADDRESS_FMT, ee) < 0)
return -ENOMEM;
- b->address = s;
- s = NULL;
+ b->address = TAKE_PTR(s);
return 0;
}
-_public_ int sd_bus_open_user(sd_bus **ret) {
- sd_bus *b;
+_public_ int sd_bus_open_user_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_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);
}
int bus_set_address_system_remote(sd_bus *b, const char *host) {
_cleanup_free_ char *e = NULL;
- char *m = NULL, *c = NULL;
+ char *m = NULL, *c = NULL, *a;
assert(b);
assert(host);
/* 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 */
return -ENOMEM;
}
- b->address = strjoin("unixexec:path=ssh,argv1=-xT,argv2=--,argv3=", e, ",argv4=systemd-stdio-bridge", c);
- if (!b->address)
+ a = strjoin("unixexec:path=ssh,argv1=-xT,argv2=--,argv3=", e, ",argv4=systemd-stdio-bridge", c);
+ if (!a)
return -ENOMEM;
- 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) {
_cleanup_free_ char *e = NULL;
+ char *a;
assert(b);
assert(machine);
if (!e)
return -ENOMEM;
- b->address = strjoin("x-machine-unix:machine=", e);
- if (!b->address)
+ a = strjoin("x-machine-unix:machine=", e);
+ if (!a)
return -ENOMEM;
- 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)
if (bus_pid_changed(bus))
return;
+ /* Don't leave ssh hanging around */
+ bus_kill_exec(bus);
+
bus_set_state(bus, BUS_CLOSED);
sd_bus_detach_event(bus);
}
_public_ sd_bus* sd_bus_flush_close_unref(sd_bus *bus) {
-
if (!bus)
return NULL;
+ /* Have to do this before flush() to prevent hang */
+ bus_kill_exec(bus);
+
sd_bus_flush(bus);
sd_bus_close(bus);
}
_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);
return 0;
}
- if (timeout == 0)
- timeout = BUS_DEFAULT_TIMEOUT;
+ if (timeout == 0) {
+ r = sd_bus_get_method_call_timeout(b, &timeout);
+ if (r < 0)
+ return r;
+ }
if (!m->sender && b->patch_sender) {
r = sd_bus_message_set_sender(m, b->patch_sender);
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;
}
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
/* We don't allow recursively invoking sd_bus_process(). */
assert_return(!bus->current_message, -EBUSY);
- assert(!bus->current_slot);
+ assert(!bus->current_slot); /* This should be NULL whenever bus->current_message is */
+
+ BUS_DONT_DESTROY(bus);
switch (bus->state) {
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) {
return bus_default(sd_bus_open_user, &default_user_bus, ret);
}
assert_return(bus->description, -ENXIO);
assert_return(!bus_pid_changed(bus), -ECHILD);
- *description = bus->description;
+ if (bus->description)
+ *description = bus->description;
+ else if (bus->is_system)
+ *description = "system";
+ else if (bus->is_user)
+ *description = "user";
+ else
+ *description = NULL;
+
return 0;
}
*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;
+}
+
+_public_ int sd_bus_set_method_call_timeout(sd_bus *bus, uint64_t usec) {
+ assert_return(bus, -EINVAL);
+ assert_return(bus = bus_resolve(bus), -ENOPKG);
+
+ bus->method_call_timeout = usec;
+ return 0;
+}
+
+_public_ int sd_bus_get_method_call_timeout(sd_bus *bus, uint64_t *ret) {
+ const char *e;
+ usec_t usec;
+
+ assert_return(bus, -EINVAL);
+ assert_return(bus = bus_resolve(bus), -ENOPKG);
+ assert_return(ret, -EINVAL);
+
+ if (bus->method_call_timeout != 0) {
+ *ret = bus->method_call_timeout;
+ return 0;
+ }
+
+ e = secure_getenv("SYSTEMD_BUS_TIMEOUT");
+ if (e && parse_sec(e, &usec) >= 0 && usec != 0) {
+ /* Save the parsed value to avoid multiple parsing. To change the timeout value,
+ * use sd_bus_set_method_call_timeout() instead of setenv(). */
+ *ret = bus->method_call_timeout = usec;
+ return 0;
+ }
+
+ *ret = bus->method_call_timeout = BUS_DEFAULT_TIMEOUT;
+ return 0;
+}
projects / thirdparty / systemd.git / blobdiff