#include <sys/socket.h>

#include <sys/capability.h>

#include "util.h"

#include "strv.h"

#include "macro.h"

#include "def.h"

#include "missing.h"

#include "sd-event.h"

#include "sd-bus.h"

#include "bus-error.h"

#include "bus-message.h"

#include "bus-util.h"

#include "bus-internal.h"

static int name_owner_change_callback(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {

sd_event *e = userdata;

assert(bus);

assert(m);

assert(e);

sd_event_exit(e, 0);

return 1;

}

int bus_async_unregister_and_exit(sd_event *e, sd_bus *bus, const char *name) {

_cleanup_free_ char *match = NULL;

const char *unique;

int r;

assert(e);

assert(bus);

assert(name);

/* We unregister the name here and then wait for the

r = sd_bus_get_unique_name(bus, &unique);

if (r < 0)

return r;

r = asprintf(&match,

"sender='org.freedesktop.DBus',"

"type='signal',"

"interface='org.freedesktop.DBus',"

"member='NameOwnerChanged',"

"path='/org/freedesktop/DBus',"

"arg0='%s',"

"arg1='%s',"

"arg2=''", name, unique);

if (r < 0)

return -ENOMEM;

r = sd_bus_add_match(bus, match, name_owner_change_callback, e);

if (r < 0)

return r;

r = sd_bus_release_name(bus, name);

if (r < 0)

return r;

return 0;

}

int bus_event_loop_with_idle(

sd_event *e,

sd_bus *bus,

const char *name,

usec_t timeout,

check_idle_t check_idle,

void *userdata) {

bool exiting = false;

int r, code;

assert(e);

assert(bus);

assert(name);

for (;;) {

bool idle;

r = sd_event_get_state(e);

if (r < 0)

return r;

if (r == SD_EVENT_FINISHED)

break;

if (check_idle)

idle = check_idle(userdata);

else

idle = true;

r = sd_event_run(e, exiting || !idle ? (uint64_t) -1 : timeout);

if (r < 0)

return r;

if (r == 0 && !exiting) {

r = bus_async_unregister_and_exit(e, bus, name);

if (r < 0)

return r;

exiting = true;

}

}

r = sd_event_get_exit_code(e, &code);

if (r < 0)

return r;

return code;

}

int bus_name_has_owner(sd_bus *c, const char *name, sd_bus_error *error) {

_cleanup_bus_message_unref_ sd_bus_message *rep = NULL;

int r, has_owner = 0;

assert(c);

assert(name);

r = sd_bus_call_method(c,

"org.freedesktop.DBus",

"/org/freedesktop/dbus",

"org.freedesktop.DBus",

"NameHasOwner",

error,

&rep,

"s",

name);

if (r < 0)

return r;

r = sd_bus_message_read_basic(rep, 'b', &has_owner);

if (r < 0)

return sd_bus_error_set_errno(error, r);

return has_owner;

}

int bus_verify_polkit(

sd_bus *bus,

sd_bus_message *m,

const char *action,

bool interactive,

bool *_challenge,

sd_bus_error *e) {

_cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;

uid_t uid;

int r;

assert(bus);

assert(m);

assert(action);

r = sd_bus_query_sender_creds(m, SD_BUS_CREDS_UID, &creds);

if (r < 0)

return r;

r = sd_bus_creds_get_uid(creds, &uid);

if (r < 0)

return r;

if (uid == 0)

return 1;

#ifdef ENABLE_POLKIT

else {

_cleanup_bus_message_unref_ sd_bus_message *reply = NULL;

int authorized = false, challenge = false;

const char *sender;

sender = sd_bus_message_get_sender(m);

if (!sender)

return -EBADMSG;

r = sd_bus_call_method(

bus,

"org.freedesktop.PolicyKit1",

"/org/freedesktop/PolicyKit1/Authority",

"org.freedesktop.PolicyKit1.Authority",

"CheckAuthorization",

e,

&reply,

"(sa{sv})sa{ss}us",

"system-bus-name", 1, "name", "s", sender,

action,

0,

interactive ? 1 : 0,

"");

if (r < 0) {

/* Treat no PK available as access denied */

if (sd_bus_error_has_name(e, SD_BUS_ERROR_SERVICE_UNKNOWN)) {

sd_bus_error_free(e);

return -EACCES;

}

return r;

}

r = sd_bus_message_enter_container(reply, 'r', "bba{ss}");

if (r < 0)

return r;

r = sd_bus_message_read(reply, "bb", &authorized, &challenge);

if (r < 0)

return r;

if (authorized)

return 1;

if (_challenge) {

*_challenge = challenge;

return 0;

}

}

#endif

return -EACCES;

}

#ifdef ENABLE_POLKIT

typedef struct AsyncPolkitQuery {

sd_bus_message *request, *reply;

sd_bus_message_handler_t callback;

void *userdata;

uint64_t serial;

Hashmap *registry;

} AsyncPolkitQuery;

static void async_polkit_query_free(sd_bus *b, AsyncPolkitQuery *q) {

if (!q)

return;

if (q->serial > 0 && b)

sd_bus_call_async_cancel(b, q->serial);

if (q->registry && q->request)

hashmap_remove(q->registry, q->request);

sd_bus_message_unref(q->request);

sd_bus_message_unref(q->reply);

free(q);

}

static int async_polkit_callback(sd_bus *bus, sd_bus_message *reply, void *userdata, sd_bus_error *error) {

_cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL;

AsyncPolkitQuery *q = userdata;

int r;

assert(bus);

assert(reply);

assert(q);

q->reply = sd_bus_message_ref(reply);

q->serial = 0;

r = sd_bus_message_rewind(q->request, true);

if (r < 0) {

r = sd_bus_reply_method_errno(q->request, r, NULL);

goto finish;

}

r = q->callback(bus, q->request, q->userdata, &error_buffer);

r = bus_maybe_reply_error(q->request, r, &error_buffer);

finish:

async_polkit_query_free(bus, q);

return r;

}

#endif

int bus_verify_polkit_async(

sd_bus *bus,

Hashmap **registry,

sd_bus_message *m,

const char *action,

bool interactive,

sd_bus_error *error,

sd_bus_message_handler_t callback,

void *userdata) {

#ifdef ENABLE_POLKIT

_cleanup_bus_message_unref_ sd_bus_message *pk = NULL;

AsyncPolkitQuery *q;

const char *sender;

#endif

_cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;

uid_t uid;

int r;

assert(bus);

assert(registry);

assert(m);

assert(action);

#ifdef ENABLE_POLKIT

q = hashmap_get(*registry, m);

if (q) {

int authorized, challenge;

/* This is the second invocation of this function, and

assert(q->reply);

if (sd_bus_message_is_method_error(q->reply, NULL)) {

const sd_bus_error *e;

/* Copy error from polkit reply */

e = sd_bus_message_get_error(q->reply);

sd_bus_error_copy(error, e);

/* Treat no PK available as access denied */

if (sd_bus_error_has_name(e, SD_BUS_ERROR_SERVICE_UNKNOWN))

return -EACCES;

return -sd_bus_error_get_errno(e);

}

r = sd_bus_message_enter_container(q->reply, 'r', "bba{ss}");

if (r >= 0)

r = sd_bus_message_read(q->reply, "bb", &authorized, &challenge);

if (r < 0)

return r;

if (authorized)

return 1;

return -EACCES;

}

#endif

r = sd_bus_query_sender_creds(m, SD_BUS_CREDS_UID, &creds);

if (r < 0)

return r;

r = sd_bus_creds_get_uid(creds, &uid);

if (r < 0)

return r;

if (uid == 0)

return 1;

#ifdef ENABLE_POLKIT

sender = sd_bus_message_get_sender(m);

if (!sender)

return -EBADMSG;

r = hashmap_ensure_allocated(registry, trivial_hash_func, trivial_compare_func);

if (r < 0)

return r;

r = sd_bus_message_new_method_call(

bus,

"org.freedesktop.PolicyKit1",

"/org/freedesktop/PolicyKit1/Authority",

"org.freedesktop.PolicyKit1.Authority",

"CheckAuthorization",

&pk);

if (r < 0)

return r;

r = sd_bus_message_append(

pk,

"(sa{sv})sa{ss}us",

"system-bus-name", 1, "name", "s", sender,

action,

0,

interactive ? 1 : 0,

NULL);

if (r < 0)

return r;

q = new0(AsyncPolkitQuery, 1);

if (!q)

return -ENOMEM;

q->request = sd_bus_message_ref(m);

q->callback = callback;

q->userdata = userdata;

r = hashmap_put(*registry, m, q);

if (r < 0) {

async_polkit_query_free(bus, q);

return r;

}

q->registry = *registry;

r = sd_bus_call_async(bus, pk, async_polkit_callback, q, 0, &q->serial);

if (r < 0) {

async_polkit_query_free(bus, q);

return r;

}

return 0;

#endif

return -EACCES;

}

void bus_verify_polkit_async_registry_free(sd_bus *bus, Hashmap *registry) {

#ifdef ENABLE_POLKIT

AsyncPolkitQuery *q;

while ((q = hashmap_steal_first(registry)))

async_polkit_query_free(bus, q);

hashmap_free(registry);

#endif

}

int bus_check_peercred(sd_bus *c) {

struct ucred ucred;

socklen_t l;

int fd;

assert(c);

fd = sd_bus_get_fd(c);

if (fd < 0)

return fd;

l = sizeof(struct ucred);

if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l) < 0)

return -errno;

if (l != sizeof(struct ucred))

return -E2BIG;

if (ucred.uid != 0 && ucred.uid != geteuid())

return -EPERM;

return 1;

}

int bus_open_system_systemd(sd_bus **_bus) {

_cleanup_bus_unref_ sd_bus *bus = NULL;

int r;

assert(_bus);

if (geteuid() != 0)

return sd_bus_open_system(_bus);

/* If we are root and kdbus is not available, then let's talk

#ifdef ENABLE_KDBUS

r = sd_bus_new(&bus);

if (r < 0)

return r;

r = sd_bus_set_address(bus, "kernel:path=/dev/kdbus/0-system/bus");

if (r < 0)

return r;

bus->bus_client = true;

r = sd_bus_start(bus);

if (r >= 0) {

*_bus = bus;

bus = NULL;

return 0;

}

bus = sd_bus_unref(bus);

#endif

r = sd_bus_new(&bus);

if (r < 0)

return r;

r = sd_bus_set_address(bus, "unix:path=/run/systemd/private");

if (r < 0)

return r;

r = sd_bus_start(bus);

if (r < 0)

return sd_bus_open_system(_bus);

r = bus_check_peercred(bus);

if (r < 0)

return r;

*_bus = bus;

bus = NULL;

return 0;

}

int bus_open_user_systemd(sd_bus **_bus) {

_cleanup_bus_unref_ sd_bus *bus = NULL;

_cleanup_free_ char *ee = NULL;

const char *e;

int r;

/* Try via kdbus first, and then directly */

assert(_bus);

#ifdef ENABLE_KDBUS

r = sd_bus_new(&bus);

if (r < 0)

return r;

if (asprintf(&bus->address, "kernel:path=/dev/kdbus/%lu-user/bus", (unsigned long) getuid()) < 0)

return -ENOMEM;

bus->bus_client = true;

r = sd_bus_start(bus);

if (r >= 0) {

*_bus = bus;

bus = NULL;

return 0;

}

bus = sd_bus_unref(bus);

#endif

e = secure_getenv("XDG_RUNTIME_DIR");

if (!e)

return sd_bus_open_system(_bus);

ee = bus_address_escape(e);

if (!ee)

return -ENOMEM;

r = sd_bus_new(&bus);

if (r < 0)

return r;

bus->address = strjoin("unix:path=", ee, "/systemd/private", NULL);

if (!bus->address)

return -ENOMEM;

r = sd_bus_start(bus);

if (r < 0)

return sd_bus_open_system(_bus);

r = bus_check_peercred(bus);

if (r < 0)

return r;

*_bus = bus;

bus = NULL;

return 0;

}

int bus_print_property(const char *name, sd_bus_message *property, bool all) {

char type;

const char *contents;

int r;

assert(name);

assert(property);

r = sd_bus_message_peek_type(property, &type, &contents);

if (r < 0)

return r;

switch (type) {

case SD_BUS_TYPE_STRING: {

const char *s;

r = sd_bus_message_read_basic(property, type, &s);

if (r < 0)

return r;

if (all || !isempty(s))

printf("%s=%s\n", name, s);

return 1;

}

case SD_BUS_TYPE_BOOLEAN: {

bool b;

r = sd_bus_message_read_basic(property, type, &b);

if (r < 0)

return r;

printf("%s=%s\n", name, yes_no(b));

return 1;

}

case SD_BUS_TYPE_UINT64: {

uint64_t u;

r = sd_bus_message_read_basic(property, type, &u);

if (r < 0)

return r;

/* Yes, heuristics! But we can change this check

if (endswith(name, "Timestamp")) {

char timestamp[FORMAT_TIMESTAMP_MAX], *t;

t = format_timestamp(timestamp, sizeof(timestamp), u);

if (t || all)

printf("%s=%s\n", name, strempty(t));

} else if (strstr(name, "USec")) {

char timespan[FORMAT_TIMESPAN_MAX];

printf("%s=%s\n", name, format_timespan(timespan, sizeof(timespan), u, 0));

} else

printf("%s=%llu\n", name, (unsigned long long) u);

return 1;

}

case SD_BUS_TYPE_UINT32: {

uint32_t u;

r = sd_bus_message_read_basic(property, type, &u);

if (r < 0)

return r;

if (strstr(name, "UMask") || strstr(name, "Mode"))

printf("%s=%04o\n", name, u);

else

printf("%s=%u\n", name, (unsigned) u);

return 1;

}

case SD_BUS_TYPE_INT32: {

int32_t i;

r = sd_bus_message_read_basic(property, type, &i);

if (r < 0)

return r;

printf("%s=%i\n", name, (int) i);

return 1;

}

case SD_BUS_TYPE_DOUBLE: {

double d;

r = sd_bus_message_read_basic(property, type, &d);

if (r < 0)

return r;

printf("%s=%g\n", name, d);

return 1;

}

case SD_BUS_TYPE_ARRAY:

if (streq(contents, "s")) {

bool first = true;

const char *str;

r = sd_bus_message_enter_container(property, SD_BUS_TYPE_ARRAY, contents);

if (r < 0)

return r;

while((r = sd_bus_message_read_basic(property, SD_BUS_TYPE_STRING, &str)) > 0) {

if (first)

printf("%s=", name);

printf("%s%s", first ? "" : " ", str);

first = false;

}

if (r < 0)

return r;

if (first && all)

printf("%s=", name);

if (!first || all)

puts("");

r = sd_bus_message_exit_container(property);

if (r < 0)

return r;

return 1;

} else if (streq(contents, "y")) {

const uint8_t *u;

size_t n;

r = sd_bus_message_read_array(property, SD_BUS_TYPE_BYTE, (const void**) &u, &n);

if (r < 0)

return r;

if (all || n > 0) {

unsigned int i;

printf("%s=", name);

for (i = 0; i < n; i++)

printf("%02x", u[i]);

puts("");

}

return 1;

} else if (streq(contents, "u")) {

uint32_t *u;

size_t n;

r = sd_bus_message_read_array(property, SD_BUS_TYPE_UINT32, (const void**) &u, &n);

if (r < 0)

return r;

if (all || n > 0) {

unsigned int i;

printf("%s=", name);

for (i = 0; i < n; i++)

printf("%08x", u[i]);

puts("");

}

return 1;

}

break;

}

return 0;

}

int bus_print_all_properties(sd_bus *bus, const char *dest, const char *path, char **filter, bool all) {

_cleanup_bus_message_unref_ sd_bus_message *reply = NULL;

_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;

int r;

assert(bus);

assert(path);

r = sd_bus_call_method(bus,

dest,

path,

"org.freedesktop.DBus.Properties",

"GetAll",

&error,

&reply,

"s", "");

if (r < 0)

return r;

r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_ARRAY, "{sv}");

if (r < 0)

return r;

while ((r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_DICT_ENTRY, "sv")) > 0) {

const char *name;

const char *contents;

r = sd_bus_message_read_basic(reply, SD_BUS_TYPE_STRING, &name);

if (r < 0)

return r;

if (!filter || strv_find(filter, name)) {

r = sd_bus_message_peek_type(reply, NULL, &contents);

if (r < 0)

return r;

r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_VARIANT, contents);

if (r < 0)

return r;

r = bus_print_property(name, reply, all);

if (r < 0)

return r;

if (r == 0) {

if (all)

printf("%s=[unprintable]\n", name);

/* skip what we didn't read */

r = sd_bus_message_skip(reply, contents);

if (r < 0)

return r;

}

r = sd_bus_message_exit_container(reply);

if (r < 0)

return r;

} else {

r = sd_bus_message_skip(reply, "v");

if (r < 0)

return r;

}

r = sd_bus_message_exit_container(reply);

if (r < 0)

return r;

}

if (r < 0)

return r;

r = sd_bus_message_exit_container(reply);

if (r < 0)

return r;

return 0;

}

int bus_map_id128(sd_bus *bus, const char *member, sd_bus_message *m, sd_bus_error *error, void *userdata) {

sd_id128_t *p = userdata;

const void *v;

size_t n;

int r;

r = sd_bus_message_read_array(m, SD_BUS_TYPE_BYTE, &v, &n);

if (r < 0)

return r;

if (n == 0)

*p = SD_ID128_NULL;

else if (n == 16)

memcpy((*p).bytes, v, n);

else

return -EINVAL;

return 0;

}

static int map_basic(sd_bus *bus, const char *member, sd_bus_message *m, sd_bus_error *error, void *userdata) {

char type;

int r;

r = sd_bus_message_peek_type(m, &type, NULL);

if (r < 0)

return r;

switch (type) {

case SD_BUS_TYPE_STRING: {

const char *s;

char *str;

char **p = userdata;

r = sd_bus_message_read_basic(m, type, &s);

if (r < 0)

break;

if (isempty(s))

break;

str = strdup(s);

if (!str) {

r = -ENOMEM;

break;

}

free(*p);

*p = str;

break;

}

case SD_BUS_TYPE_ARRAY: {

_cleanup_strv_free_ char **l = NULL;

char ***p = userdata;

r = bus_message_read_strv_extend(m, &l);

if (r < 0)

break;

strv_free(*p);

*p = l;

l = NULL;

break;

}

case SD_BUS_TYPE_BOOLEAN: {

unsigned b;

bool *p = userdata;

r = sd_bus_message_read_basic(m, type, &b);

if (r < 0)

break;

*p = b;

break;

}

case SD_BUS_TYPE_UINT32: {

uint64_t u;

uint32_t *p = userdata;

r = sd_bus_message_read_basic(m, type, &u);

if (r < 0)

break;

*p = u;

break;

}

case SD_BUS_TYPE_UINT64: {

uint64_t t;

uint64_t *p = userdata;

r = sd_bus_message_read_basic(m, type, &t);

if (r < 0)

break;

*p = t;

break;

}

default:

break;

}

return r;

}

int bus_map_all_properties(sd_bus *bus,

const char *destination,

const char *path,

const struct bus_properties_map *map,

void *userdata) {

_cleanup_bus_message_unref_ sd_bus_message *m = NULL;

_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;

int r;

assert(bus);

assert(destination);

assert(path);

assert(map);

r = sd_bus_call_method(

bus,

destination,

path,

"org.freedesktop.DBus.Properties",

"GetAll",

&error,

&m,

"s", "");

if (r < 0)

return r;

r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, "{sv}");

if (r < 0)

return r;

while ((r = sd_bus_message_enter_container(m, SD_BUS_TYPE_DICT_ENTRY, "sv")) > 0) {

const struct bus_properties_map *prop;

const char *member;

const char *contents;

void *v;

unsigned i;

r = sd_bus_message_read_basic(m, SD_BUS_TYPE_STRING, &member);

if (r < 0)

return r;

for (i = 0, prop = NULL; map[i].member; i++)

if (streq(map[i].member, member)) {

prop = &map[i];

break;

}

if (prop) {

r = sd_bus_message_peek_type(m, NULL, &contents);

if (r < 0)

return r;

r = sd_bus_message_enter_container(m, SD_BUS_TYPE_VARIANT, contents);

if (r < 0)

return r;

v = (uint8_t *)userdata + prop->offset;

if (map[i].set)

r = prop->set(bus, member, m, &error, v);

else

r = map_basic(bus, member, m, &error, v);

if (r < 0)

return r;

r = sd_bus_message_exit_container(m);

if (r < 0)

return r;

} else {

r = sd_bus_message_skip(m, "v");

if (r < 0)

return r;

}

r = sd_bus_message_exit_container(m);

if (r < 0)

return r;

}

return r;

}

int bus_open_transport(BusTransport transport, const char *host, bool user, sd_bus **bus) {

int r;

assert(transport >= 0);

assert(transport < _BUS_TRANSPORT_MAX);

assert(bus);

assert_return((transport == BUS_TRANSPORT_LOCAL) == !host, -EINVAL);

assert_return(transport == BUS_TRANSPORT_LOCAL || !user, -ENOTSUP);

switch (transport) {

case BUS_TRANSPORT_LOCAL:

if (user)

r = sd_bus_default_user(bus);

else

r = sd_bus_default_system(bus);

break;

case BUS_TRANSPORT_REMOTE:

r = sd_bus_open_system_remote(host, bus);

break;

case BUS_TRANSPORT_CONTAINER:

r = sd_bus_open_system_container(host, bus);

break;

default:

assert_not_reached("Hmm, unknown transport type.");

}

return r;

}

int bus_open_transport_systemd(BusTransport transport, const char *host, bool user, sd_bus **bus) {

int r;

assert(transport >= 0);

assert(transport < _BUS_TRANSPORT_MAX);

assert(bus);

assert_return((transport == BUS_TRANSPORT_LOCAL) == !host, -EINVAL);

assert_return(transport == BUS_TRANSPORT_LOCAL || !user, -ENOTSUP);

switch (transport) {

case BUS_TRANSPORT_LOCAL:

if (user)

r = bus_open_user_systemd(bus);

else

r = bus_open_system_systemd(bus);

break;

case BUS_TRANSPORT_REMOTE:

r = sd_bus_open_system_remote(host, bus);

break;

case BUS_TRANSPORT_CONTAINER:

r = sd_bus_open_system_container(host, bus);

break;

default:

assert_not_reached("Hmm, unknown transport type.");

}

return r;

}

int bus_property_get_tristate(

sd_bus *bus,

const char *path,

const char *interface,

const char *property,

sd_bus_message *reply,

void *userdata,

sd_bus_error *error) {

int *tristate = userdata;

return sd_bus_message_append(reply, "b", *tristate > 0);

}

int bus_property_get_bool(

sd_bus *bus,

const char *path,

const char *interface,

const char *property,

sd_bus_message *reply,

void *userdata,

sd_bus_error *error) {

int b = *(bool*) userdata;

return sd_bus_message_append_basic(reply, 'b', &b);

}

#if __SIZEOF_SIZE_T__ != 8

int bus_property_get_size(

sd_bus *bus,

const char *path,

const char *interface,

const char *property,

sd_bus_message *reply,

void *userdata,

sd_bus_error *error) {

uint64_t sz = *(size_t*) userdata;

return sd_bus_message_append_basic(reply, 't', &sz);

}

#endif

#if __SIZEOF_LONG__ != 8

int bus_property_get_long(

sd_bus *bus,

const char *path,

const char *interface,

const char *property,

sd_bus_message *reply,

void *userdata,

sd_bus_error *error) {

int64_t l = *(long*) userdata;

return sd_bus_message_append_basic(reply, 'x', &l);

}

int bus_property_get_ulong(

sd_bus *bus,

const char *path,

const char *interface,

const char *property,

sd_bus_message *reply,

void *userdata,

sd_bus_error *error) {

uint64_t ul = *(unsigned long*) userdata;

return sd_bus_message_append_basic(reply, 't', &ul);

}

#endif

int bus_log_parse_error(int r) {

log_error("Failed to parse message: %s", strerror(-r));

return r;

}

int bus_log_create_error(int r) {

log_error("Failed to create message: %s", strerror(-r));

return r;

}

int bus_parse_unit_info(sd_bus_message *message, UnitInfo *u) {

assert(message);

assert(u);

return sd_bus_message_read(

message,

"(ssssssouso)",

&u->id,

&u->description,

&u->load_state,

&u->active_state,

&u->sub_state,

&u->following,

&u->unit_path,

&u->job_id,

&u->job_type,

&u->job_path);

}

int bus_maybe_reply_error(sd_bus_message *m, int r, sd_bus_error *error) {

assert(m);

if (r < 0) {

if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL)

sd_bus_reply_method_errno(m, r, error);

} else if (sd_bus_error_is_set(error)) {

if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL)

sd_bus_reply_method_error(m, error);

} else

return r;

log_debug("Failed to process message [type=%s sender=%s path=%s interface=%s member=%s signature=%s]: %s",

bus_message_type_to_string(m->header->type),

strna(m->sender),

strna(m->path),

strna(m->interface),

strna(m->member),

strna(m->root_container.signature),

bus_error_message(error, r));

return 1;

}