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-rw-r--r--src/shared/bus-util.c1753
1 files changed, 1753 insertions, 0 deletions
diff --git a/src/shared/bus-util.c b/src/shared/bus-util.c
new file mode 100644
index 0000000..cbcf698
--- /dev/null
+++ b/src/shared/bus-util.c
@@ -0,0 +1,1753 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/resource.h>
+#include <sys/socket.h>
+#include <unistd.h>
+
+#include "sd-bus-protocol.h"
+#include "sd-bus.h"
+#include "sd-daemon.h"
+#include "sd-event.h"
+#include "sd-id128.h"
+
+#include "alloc-util.h"
+#include "bus-internal.h"
+#include "bus-label.h"
+#include "bus-message.h"
+#include "bus-util.h"
+#include "cap-list.h"
+#include "cgroup-util.h"
+#include "def.h"
+#include "escape.h"
+#include "fd-util.h"
+#include "missing.h"
+#include "mountpoint-util.h"
+#include "nsflags.h"
+#include "parse-util.h"
+#include "proc-cmdline.h"
+#include "rlimit-util.h"
+#include "stdio-util.h"
+#include "strv.h"
+#include "user-util.h"
+
+static int name_owner_change_callback(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
+ sd_event *e = userdata;
+
+ assert(m);
+ assert(e);
+
+ sd_bus_close(sd_bus_message_get_bus(m));
+ sd_event_exit(e, 0);
+
+ return 1;
+}
+
+int bus_async_unregister_and_exit(sd_event *e, sd_bus *bus, const char *name) {
+ const char *match;
+ const char *unique;
+ int r;
+
+ assert(e);
+ assert(bus);
+ assert(name);
+
+ /* We unregister the name here and then wait for the
+ * NameOwnerChanged signal for this event to arrive before we
+ * quit. We do this in order to make sure that any queued
+ * requests are still processed before we really exit. */
+
+ r = sd_bus_get_unique_name(bus, &unique);
+ if (r < 0)
+ return r;
+
+ match = strjoina(
+ "sender='org.freedesktop.DBus',"
+ "type='signal',"
+ "interface='org.freedesktop.DBus',"
+ "member='NameOwnerChanged',"
+ "path='/org/freedesktop/DBus',"
+ "arg0='", name, "',",
+ "arg1='", unique, "',",
+ "arg2=''");
+
+ r = sd_bus_add_match_async(bus, NULL, match, name_owner_change_callback, NULL, e);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_release_name_async(bus, NULL, name, NULL, NULL);
+ 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 && idle) {
+
+ r = sd_bus_try_close(bus);
+ if (r == -EBUSY)
+ continue;
+
+ /* Fallback for dbus1 connections: we
+ * unregister the name and wait for the
+ * response to come through for it */
+ if (r == -EOPNOTSUPP) {
+
+ /* Inform the service manager that we
+ * are going down, so that it will
+ * queue all further start requests,
+ * instead of assuming we are already
+ * running. */
+ sd_notify(false, "STOPPING=1");
+
+ r = bus_async_unregister_and_exit(e, bus, name);
+ if (r < 0)
+ return r;
+
+ exiting = true;
+ continue;
+ }
+
+ if (r < 0)
+ return r;
+
+ sd_event_exit(e, 0);
+ break;
+ }
+ }
+
+ 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_(sd_bus_message_unrefp) 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;
+}
+
+static int check_good_user(sd_bus_message *m, uid_t good_user) {
+ _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
+ uid_t sender_uid;
+ int r;
+
+ assert(m);
+
+ if (good_user == UID_INVALID)
+ return 0;
+
+ r = sd_bus_query_sender_creds(m, SD_BUS_CREDS_EUID, &creds);
+ if (r < 0)
+ return r;
+
+ /* Don't trust augmented credentials for authorization */
+ assert_return((sd_bus_creds_get_augmented_mask(creds) & SD_BUS_CREDS_EUID) == 0, -EPERM);
+
+ r = sd_bus_creds_get_euid(creds, &sender_uid);
+ if (r < 0)
+ return r;
+
+ return sender_uid == good_user;
+}
+
+int bus_test_polkit(
+ sd_bus_message *call,
+ int capability,
+ const char *action,
+ const char **details,
+ uid_t good_user,
+ bool *_challenge,
+ sd_bus_error *e) {
+
+ int r;
+
+ assert(call);
+ assert(action);
+
+ /* Tests non-interactively! */
+
+ r = check_good_user(call, good_user);
+ if (r != 0)
+ return r;
+
+ r = sd_bus_query_sender_privilege(call, capability);
+ if (r < 0)
+ return r;
+ else if (r > 0)
+ return 1;
+#if ENABLE_POLKIT
+ else {
+ _cleanup_(sd_bus_message_unrefp) sd_bus_message *request = NULL;
+ _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
+ int authorized = false, challenge = false;
+ const char *sender, **k, **v;
+
+ sender = sd_bus_message_get_sender(call);
+ if (!sender)
+ return -EBADMSG;
+
+ r = sd_bus_message_new_method_call(
+ call->bus,
+ &request,
+ "org.freedesktop.PolicyKit1",
+ "/org/freedesktop/PolicyKit1/Authority",
+ "org.freedesktop.PolicyKit1.Authority",
+ "CheckAuthorization");
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_append(
+ request,
+ "(sa{sv})s",
+ "system-bus-name", 1, "name", "s", sender,
+ action);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_open_container(request, 'a', "{ss}");
+ if (r < 0)
+ return r;
+
+ STRV_FOREACH_PAIR(k, v, details) {
+ r = sd_bus_message_append(request, "{ss}", *k, *v);
+ if (r < 0)
+ return r;
+ }
+
+ r = sd_bus_message_close_container(request);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_append(request, "us", 0, NULL);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_call(call->bus, request, 0, e, &reply);
+ 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;
+}
+
+#if ENABLE_POLKIT
+
+typedef struct AsyncPolkitQuery {
+ sd_bus_message *request, *reply;
+ sd_bus_message_handler_t callback;
+ void *userdata;
+ sd_bus_slot *slot;
+ Hashmap *registry;
+} AsyncPolkitQuery;
+
+static void async_polkit_query_free(AsyncPolkitQuery *q) {
+
+ if (!q)
+ return;
+
+ sd_bus_slot_unref(q->slot);
+
+ 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_message *reply, void *userdata, sd_bus_error *error) {
+ _cleanup_(sd_bus_error_free) sd_bus_error error_buffer = SD_BUS_ERROR_NULL;
+ AsyncPolkitQuery *q = userdata;
+ int r;
+
+ assert(reply);
+ assert(q);
+
+ q->slot = sd_bus_slot_unref(q->slot);
+ q->reply = sd_bus_message_ref(reply);
+
+ 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(q->request, q->userdata, &error_buffer);
+ r = bus_maybe_reply_error(q->request, r, &error_buffer);
+
+finish:
+ async_polkit_query_free(q);
+
+ return r;
+}
+
+#endif
+
+int bus_verify_polkit_async(
+ sd_bus_message *call,
+ int capability,
+ const char *action,
+ const char **details,
+ bool interactive,
+ uid_t good_user,
+ Hashmap **registry,
+ sd_bus_error *error) {
+
+#if ENABLE_POLKIT
+ _cleanup_(sd_bus_message_unrefp) sd_bus_message *pk = NULL;
+ AsyncPolkitQuery *q;
+ const char *sender, **k, **v;
+ sd_bus_message_handler_t callback;
+ void *userdata;
+ int c;
+#endif
+ int r;
+
+ assert(call);
+ assert(action);
+ assert(registry);
+
+ r = check_good_user(call, good_user);
+ if (r != 0)
+ return r;
+
+#if ENABLE_POLKIT
+ q = hashmap_get(*registry, call);
+ if (q) {
+ int authorized, challenge;
+
+ /* This is the second invocation of this function, and
+ * there's already a response from polkit, let's
+ * process it */
+ 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;
+
+ if (challenge)
+ return sd_bus_error_set(error, SD_BUS_ERROR_INTERACTIVE_AUTHORIZATION_REQUIRED, "Interactive authentication required.");
+
+ return -EACCES;
+ }
+#endif
+
+ r = sd_bus_query_sender_privilege(call, capability);
+ if (r < 0)
+ return r;
+ else if (r > 0)
+ return 1;
+
+#if ENABLE_POLKIT
+ if (sd_bus_get_current_message(call->bus) != call)
+ return -EINVAL;
+
+ callback = sd_bus_get_current_handler(call->bus);
+ if (!callback)
+ return -EINVAL;
+
+ userdata = sd_bus_get_current_userdata(call->bus);
+
+ sender = sd_bus_message_get_sender(call);
+ if (!sender)
+ return -EBADMSG;
+
+ c = sd_bus_message_get_allow_interactive_authorization(call);
+ if (c < 0)
+ return c;
+ if (c > 0)
+ interactive = true;
+
+ r = hashmap_ensure_allocated(registry, NULL);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_new_method_call(
+ call->bus,
+ &pk,
+ "org.freedesktop.PolicyKit1",
+ "/org/freedesktop/PolicyKit1/Authority",
+ "org.freedesktop.PolicyKit1.Authority",
+ "CheckAuthorization");
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_append(
+ pk,
+ "(sa{sv})s",
+ "system-bus-name", 1, "name", "s", sender,
+ action);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_open_container(pk, 'a', "{ss}");
+ if (r < 0)
+ return r;
+
+ STRV_FOREACH_PAIR(k, v, details) {
+ r = sd_bus_message_append(pk, "{ss}", *k, *v);
+ if (r < 0)
+ return r;
+ }
+
+ r = sd_bus_message_close_container(pk);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_append(pk, "us", interactive, NULL);
+ if (r < 0)
+ return r;
+
+ q = new0(AsyncPolkitQuery, 1);
+ if (!q)
+ return -ENOMEM;
+
+ q->request = sd_bus_message_ref(call);
+ q->callback = callback;
+ q->userdata = userdata;
+
+ r = hashmap_put(*registry, call, q);
+ if (r < 0) {
+ async_polkit_query_free(q);
+ return r;
+ }
+
+ q->registry = *registry;
+
+ r = sd_bus_call_async(call->bus, &q->slot, pk, async_polkit_callback, q, 0);
+ if (r < 0) {
+ async_polkit_query_free(q);
+ return r;
+ }
+
+ return 0;
+#endif
+
+ return -EACCES;
+}
+
+void bus_verify_polkit_async_registry_free(Hashmap *registry) {
+#if ENABLE_POLKIT
+ hashmap_free_with_destructor(registry, async_polkit_query_free);
+#endif
+}
+
+int bus_check_peercred(sd_bus *c) {
+ struct ucred ucred;
+ int fd, r;
+
+ assert(c);
+
+ fd = sd_bus_get_fd(c);
+ if (fd < 0)
+ return fd;
+
+ r = getpeercred(fd, &ucred);
+ if (r < 0)
+ return r;
+
+ if (ucred.uid != 0 && ucred.uid != geteuid())
+ return -EPERM;
+
+ return 1;
+}
+
+int bus_connect_system_systemd(sd_bus **_bus) {
+ _cleanup_(sd_bus_close_unrefp) sd_bus *bus = NULL;
+ int r;
+
+ assert(_bus);
+
+ if (geteuid() != 0)
+ return sd_bus_default_system(_bus);
+
+ /* If we are root then let's talk directly to the system
+ * instance, instead of going via the bus */
+
+ 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_default_system(_bus);
+
+ r = bus_check_peercred(bus);
+ if (r < 0)
+ return r;
+
+ *_bus = TAKE_PTR(bus);
+
+ return 0;
+}
+
+int bus_connect_user_systemd(sd_bus **_bus) {
+ _cleanup_(sd_bus_close_unrefp) sd_bus *bus = NULL;
+ _cleanup_free_ char *ee = NULL;
+ const char *e;
+ int r;
+
+ assert(_bus);
+
+ e = secure_getenv("XDG_RUNTIME_DIR");
+ if (!e)
+ return sd_bus_default_user(_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");
+ if (!bus->address)
+ return -ENOMEM;
+
+ r = sd_bus_start(bus);
+ if (r < 0)
+ return sd_bus_default_user(_bus);
+
+ r = bus_check_peercred(bus);
+ if (r < 0)
+ return r;
+
+ *_bus = TAKE_PTR(bus);
+
+ return 0;
+}
+
+int bus_print_property_value(const char *name, const char *expected_value, bool only_value, const char *fmt, ...) {
+ va_list ap;
+ int r;
+
+ assert(name);
+ assert(fmt);
+
+ if (expected_value) {
+ _cleanup_free_ char *s = NULL;
+
+ va_start(ap, fmt);
+ r = vasprintf(&s, fmt, ap);
+ va_end(ap);
+ if (r < 0)
+ return -ENOMEM;
+
+ if (streq_ptr(expected_value, s)) {
+ if (only_value)
+ puts(s);
+ else
+ printf("%s=%s\n", name, s);
+ }
+
+ return 0;
+ }
+
+ if (!only_value)
+ printf("%s=", name);
+ va_start(ap, fmt);
+ vprintf(fmt, ap);
+ va_end(ap);
+ puts("");
+
+ return 0;
+}
+
+static int bus_print_property(const char *name, const char *expected_value, sd_bus_message *m, bool value, bool all) {
+ char type;
+ const char *contents;
+ int r;
+
+ assert(name);
+ assert(m);
+
+ r = sd_bus_message_peek_type(m, &type, &contents);
+ if (r < 0)
+ return r;
+
+ switch (type) {
+
+ case SD_BUS_TYPE_STRING: {
+ const char *s;
+
+ r = sd_bus_message_read_basic(m, type, &s);
+ if (r < 0)
+ return r;
+
+ if (all || !isempty(s)) {
+ bool good;
+
+ /* This property has a single value, so we need to take
+ * care not to print a new line, everything else is OK. */
+ good = !strchr(s, '\n');
+ bus_print_property_value(name, expected_value, value, "%s", good ? s : "[unprintable]");
+ }
+
+ return 1;
+ }
+
+ case SD_BUS_TYPE_BOOLEAN: {
+ int b;
+
+ r = sd_bus_message_read_basic(m, type, &b);
+ if (r < 0)
+ return r;
+
+ if (expected_value && parse_boolean(expected_value) != b)
+ return 1;
+
+ bus_print_property_value(name, NULL, value, "%s", yes_no(b));
+ return 1;
+ }
+
+ case SD_BUS_TYPE_UINT64: {
+ uint64_t u;
+
+ r = sd_bus_message_read_basic(m, type, &u);
+ if (r < 0)
+ return r;
+
+ /* Yes, heuristics! But we can change this check
+ * should it turn out to not be sufficient */
+
+ if (endswith(name, "Timestamp") ||
+ STR_IN_SET(name, "NextElapseUSecRealtime", "LastTriggerUSec", "TimeUSec", "RTCTimeUSec")) {
+ char timestamp[FORMAT_TIMESTAMP_MAX];
+ const char *t;
+
+ t = format_timestamp(timestamp, sizeof(timestamp), u);
+ if (t || all)
+ bus_print_property_value(name, expected_value, value, "%s", strempty(t));
+
+ } else if (strstr(name, "USec")) {
+ char timespan[FORMAT_TIMESPAN_MAX];
+
+ (void) format_timespan(timespan, sizeof(timespan), u, 0);
+ bus_print_property_value(name, expected_value, value, "%s", timespan);
+
+ } else if (streq(name, "RestrictNamespaces")) {
+ _cleanup_free_ char *s = NULL;
+ const char *result;
+
+ if ((u & NAMESPACE_FLAGS_ALL) == 0)
+ result = "yes";
+ else if ((u & NAMESPACE_FLAGS_ALL) == NAMESPACE_FLAGS_ALL)
+ result = "no";
+ else {
+ r = namespace_flags_to_string(u, &s);
+ if (r < 0)
+ return r;
+
+ result = s;
+ }
+
+ bus_print_property_value(name, expected_value, value, "%s", result);
+
+ } else if (streq(name, "MountFlags")) {
+ const char *result;
+
+ result = mount_propagation_flags_to_string(u);
+ if (!result)
+ return -EINVAL;
+
+ bus_print_property_value(name, expected_value, value, "%s", result);
+
+ } else if (STR_IN_SET(name, "CapabilityBoundingSet", "AmbientCapabilities")) {
+ _cleanup_free_ char *s = NULL;
+
+ r = capability_set_to_string_alloc(u, &s);
+ if (r < 0)
+ return r;
+
+ bus_print_property_value(name, expected_value, value, "%s", s);
+
+ } else if ((STR_IN_SET(name, "CPUWeight", "StartupCPUWeight", "IOWeight", "StartupIOWeight") && u == CGROUP_WEIGHT_INVALID) ||
+ (STR_IN_SET(name, "CPUShares", "StartupCPUShares") && u == CGROUP_CPU_SHARES_INVALID) ||
+ (STR_IN_SET(name, "BlockIOWeight", "StartupBlockIOWeight") && u == CGROUP_BLKIO_WEIGHT_INVALID) ||
+ (STR_IN_SET(name, "MemoryCurrent", "TasksCurrent") && u == (uint64_t) -1) ||
+ (endswith(name, "NSec") && u == (uint64_t) -1))
+
+ bus_print_property_value(name, expected_value, value, "%s", "[not set]");
+
+ else if ((STR_IN_SET(name, "MemoryLow", "MemoryHigh", "MemoryMax", "MemorySwapMax", "MemoryLimit") && u == CGROUP_LIMIT_MAX) ||
+ (STR_IN_SET(name, "TasksMax", "DefaultTasksMax") && u == (uint64_t) -1) ||
+ (startswith(name, "Limit") && u == (uint64_t) -1) ||
+ (startswith(name, "DefaultLimit") && u == (uint64_t) -1))
+
+ bus_print_property_value(name, expected_value, value, "%s", "infinity");
+ else
+ bus_print_property_value(name, expected_value, value, "%"PRIu64, u);
+
+ return 1;
+ }
+
+ case SD_BUS_TYPE_INT64: {
+ int64_t i;
+
+ r = sd_bus_message_read_basic(m, type, &i);
+ if (r < 0)
+ return r;
+
+ bus_print_property_value(name, expected_value, value, "%"PRIi64, i);
+ return 1;
+ }
+
+ case SD_BUS_TYPE_UINT32: {
+ uint32_t u;
+
+ r = sd_bus_message_read_basic(m, type, &u);
+ if (r < 0)
+ return r;
+
+ if (strstr(name, "UMask") || strstr(name, "Mode"))
+ bus_print_property_value(name, expected_value, value, "%04o", u);
+
+ else if (streq(name, "UID")) {
+ if (u == UID_INVALID)
+ bus_print_property_value(name, expected_value, value, "%s", "[not set]");
+ else
+ bus_print_property_value(name, expected_value, value, "%"PRIu32, u);
+ } else if (streq(name, "GID")) {
+ if (u == GID_INVALID)
+ bus_print_property_value(name, expected_value, value, "%s", "[not set]");
+ else
+ bus_print_property_value(name, expected_value, value, "%"PRIu32, u);
+ } else
+ bus_print_property_value(name, expected_value, value, "%"PRIu32, u);
+
+ return 1;
+ }
+
+ case SD_BUS_TYPE_INT32: {
+ int32_t i;
+
+ r = sd_bus_message_read_basic(m, type, &i);
+ if (r < 0)
+ return r;
+
+ bus_print_property_value(name, expected_value, value, "%"PRIi32, i);
+ return 1;
+ }
+
+ case SD_BUS_TYPE_DOUBLE: {
+ double d;
+
+ r = sd_bus_message_read_basic(m, type, &d);
+ if (r < 0)
+ return r;
+
+ bus_print_property_value(name, expected_value, value, "%g", d);
+ return 1;
+ }
+
+ case SD_BUS_TYPE_ARRAY:
+ if (streq(contents, "s")) {
+ bool first = true;
+ const char *str;
+
+ r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, contents);
+ if (r < 0)
+ return r;
+
+ while ((r = sd_bus_message_read_basic(m, SD_BUS_TYPE_STRING, &str)) > 0) {
+ bool good;
+
+ if (first && !value)
+ printf("%s=", name);
+
+ /* This property has multiple space-separated values, so
+ * neither spaces nor newlines can be allowed in a value. */
+ good = str[strcspn(str, " \n")] == '\0';
+
+ printf("%s%s", first ? "" : " ", good ? str : "[unprintable]");
+
+ first = false;
+ }
+ if (r < 0)
+ return r;
+
+ if (first && all && !value)
+ printf("%s=", name);
+ if (!first || all)
+ puts("");
+
+ r = sd_bus_message_exit_container(m);
+ 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(m, SD_BUS_TYPE_BYTE, (const void**) &u, &n);
+ if (r < 0)
+ return r;
+
+ if (all || n > 0) {
+ unsigned i;
+
+ if (!value)
+ 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(m, SD_BUS_TYPE_UINT32, (const void**) &u, &n);
+ if (r < 0)
+ return r;
+
+ if (all || n > 0) {
+ unsigned i;
+
+ if (!value)
+ printf("%s=", name);
+
+ for (i = 0; i < n; i++)
+ printf("%08x", u[i]);
+
+ puts("");
+ }
+
+ return 1;
+ }
+
+ break;
+ }
+
+ return 0;
+}
+
+int bus_message_print_all_properties(
+ sd_bus_message *m,
+ bus_message_print_t func,
+ char **filter,
+ bool value,
+ bool all,
+ Set **found_properties) {
+
+ int r;
+
+ assert(m);
+
+ 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) {
+ _cleanup_free_ char *name_with_equal = NULL;
+ const char *name, *contents, *expected_value = NULL;
+
+ r = sd_bus_message_read_basic(m, SD_BUS_TYPE_STRING, &name);
+ if (r < 0)
+ return r;
+
+ if (found_properties) {
+ r = set_ensure_allocated(found_properties, &string_hash_ops);
+ if (r < 0)
+ return log_oom();
+
+ r = set_put(*found_properties, name);
+ if (r < 0 && r != -EEXIST)
+ return log_oom();
+ }
+
+ name_with_equal = strappend(name, "=");
+ if (!name_with_equal)
+ return log_oom();
+
+ if (!filter || strv_find(filter, name) ||
+ (expected_value = strv_find_startswith(filter, name_with_equal))) {
+ 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;
+
+ if (func)
+ r = func(name, expected_value, m, value, all);
+ if (!func || r == 0)
+ r = bus_print_property(name, expected_value, m, value, all);
+ if (r < 0)
+ return r;
+ if (r == 0) {
+ if (all && !expected_value)
+ printf("%s=[unprintable]\n", name);
+ /* skip what we didn't read */
+ r = sd_bus_message_skip(m, contents);
+ 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;
+ }
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_exit_container(m);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+int bus_print_all_properties(
+ sd_bus *bus,
+ const char *dest,
+ const char *path,
+ bus_message_print_t func,
+ char **filter,
+ bool value,
+ bool all,
+ Set **found_properties) {
+
+ _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
+ _cleanup_(sd_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;
+
+ return bus_message_print_all_properties(reply, func, filter, value, all, found_properties);
+}
+
+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, unsigned flags, 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 **p = userdata;
+ const char *s;
+
+ r = sd_bus_message_read_basic(m, type, &s);
+ if (r < 0)
+ return r;
+
+ if (isempty(s))
+ s = NULL;
+
+ if (flags & BUS_MAP_STRDUP)
+ return free_and_strdup((char **) userdata, s);
+
+ *p = s;
+ return 0;
+ }
+
+ 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)
+ return r;
+
+ return strv_free_and_replace(*p, l);
+ }
+
+ case SD_BUS_TYPE_BOOLEAN: {
+ int b;
+
+ r = sd_bus_message_read_basic(m, type, &b);
+ if (r < 0)
+ return r;
+
+ if (flags & BUS_MAP_BOOLEAN_AS_BOOL)
+ *(bool*) userdata = b;
+ else
+ *(int*) userdata = b;
+
+ return 0;
+ }
+
+ case SD_BUS_TYPE_INT32:
+ case SD_BUS_TYPE_UINT32: {
+ uint32_t u, *p = userdata;
+
+ r = sd_bus_message_read_basic(m, type, &u);
+ if (r < 0)
+ return r;
+
+ *p = u;
+ return 0;
+ }
+
+ case SD_BUS_TYPE_INT64:
+ case SD_BUS_TYPE_UINT64: {
+ uint64_t t, *p = userdata;
+
+ r = sd_bus_message_read_basic(m, type, &t);
+ if (r < 0)
+ return r;
+
+ *p = t;
+ return 0;
+ }
+
+ case SD_BUS_TYPE_DOUBLE: {
+ double d, *p = userdata;
+
+ r = sd_bus_message_read_basic(m, type, &d);
+ if (r < 0)
+ return r;
+
+ *p = d;
+ return 0;
+ }}
+
+ return -EOPNOTSUPP;
+}
+
+int bus_message_map_all_properties(
+ sd_bus_message *m,
+ const struct bus_properties_map *map,
+ unsigned flags,
+ sd_bus_error *error,
+ void *userdata) {
+
+ int r;
+
+ assert(m);
+ assert(map);
+
+ 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(sd_bus_message_get_bus(m), member, m, error, v);
+ else
+ r = map_basic(sd_bus_message_get_bus(m), member, m, flags, 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;
+ }
+ if (r < 0)
+ return r;
+
+ return sd_bus_message_exit_container(m);
+}
+
+int bus_map_all_properties(
+ sd_bus *bus,
+ const char *destination,
+ const char *path,
+ const struct bus_properties_map *map,
+ unsigned flags,
+ sd_bus_error *error,
+ sd_bus_message **reply,
+ void *userdata) {
+
+ _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
+ int r;
+
+ assert(bus);
+ assert(destination);
+ assert(path);
+ assert(map);
+ assert(reply || (flags & BUS_MAP_STRDUP));
+
+ r = sd_bus_call_method(
+ bus,
+ destination,
+ path,
+ "org.freedesktop.DBus.Properties",
+ "GetAll",
+ error,
+ &m,
+ "s", "");
+ if (r < 0)
+ return r;
+
+ r = bus_message_map_all_properties(m, map, flags, error, userdata);
+ if (r < 0)
+ return r;
+
+ if (reply)
+ *reply = sd_bus_message_ref(m);
+
+ return r;
+}
+
+int bus_connect_transport(BusTransport transport, const char *host, bool user, sd_bus **ret) {
+ _cleanup_(sd_bus_close_unrefp) sd_bus *bus = NULL;
+ int r;
+
+ assert(transport >= 0);
+ assert(transport < _BUS_TRANSPORT_MAX);
+ assert(ret);
+
+ assert_return((transport == BUS_TRANSPORT_LOCAL) == !host, -EINVAL);
+ assert_return(transport == BUS_TRANSPORT_LOCAL || !user, -EOPNOTSUPP);
+
+ switch (transport) {
+
+ case BUS_TRANSPORT_LOCAL:
+ if (user)
+ r = sd_bus_default_user(&bus);
+ else {
+ if (sd_booted() <= 0) {
+ /* Print a friendly message when the local system is actually not running systemd as PID 1. */
+ log_error("System has not been booted with systemd as init system (PID 1). Can't operate.");
+
+ return -EHOSTDOWN;
+ }
+ r = sd_bus_default_system(&bus);
+ }
+ break;
+
+ case BUS_TRANSPORT_REMOTE:
+ r = sd_bus_open_system_remote(&bus, host);
+ break;
+
+ case BUS_TRANSPORT_MACHINE:
+ r = sd_bus_open_system_machine(&bus, host);
+ break;
+
+ default:
+ assert_not_reached("Hmm, unknown transport type.");
+ }
+ if (r < 0)
+ return r;
+
+ r = sd_bus_set_exit_on_disconnect(bus, true);
+ if (r < 0)
+ return r;
+
+ *ret = TAKE_PTR(bus);
+
+ return 0;
+}
+
+int bus_connect_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, -EOPNOTSUPP);
+
+ switch (transport) {
+
+ case BUS_TRANSPORT_LOCAL:
+ if (user)
+ r = bus_connect_user_systemd(bus);
+ else {
+ if (sd_booted() <= 0)
+ /* Print a friendly message when the local system is actually not running systemd as PID 1. */
+ return log_error_errno(SYNTHETIC_ERRNO(EHOSTDOWN),
+ "System has not been booted with systemd as init system (PID 1). Can't operate.");
+ r = bus_connect_system_systemd(bus);
+ }
+ break;
+
+ case BUS_TRANSPORT_REMOTE:
+ r = sd_bus_open_system_remote(bus, host);
+ break;
+
+ case BUS_TRANSPORT_MACHINE:
+ r = sd_bus_open_system_machine(bus, host);
+ break;
+
+ default:
+ assert_not_reached("Hmm, unknown transport type.");
+ }
+
+ return r;
+}
+
+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);
+}
+
+int bus_property_set_bool(
+ sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const char *property,
+ sd_bus_message *value,
+ void *userdata,
+ sd_bus_error *error) {
+
+ int b, r;
+
+ r = sd_bus_message_read(value, "b", &b);
+ if (r < 0)
+ return r;
+
+ *(bool*) userdata = b;
+ return 0;
+}
+
+int bus_property_get_id128(
+ sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const char *property,
+ sd_bus_message *reply,
+ void *userdata,
+ sd_bus_error *error) {
+
+ sd_id128_t *id = userdata;
+
+ if (sd_id128_is_null(*id)) /* Add an empty array if the ID is zero */
+ return sd_bus_message_append(reply, "ay", 0);
+ else
+ return sd_bus_message_append_array(reply, 'y', id->bytes, 16);
+}
+
+#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) {
+ return log_error_errno(r, "Failed to parse bus message: %m");
+}
+
+int bus_log_create_error(int r) {
+ return log_error_errno(r, "Failed to create bus message: %m");
+}
+
+/**
+ * bus_path_encode_unique() - encode unique object path
+ * @b: bus connection or NULL
+ * @prefix: object path prefix
+ * @sender_id: unique-name of client, or NULL
+ * @external_id: external ID to be chosen by client, or NULL
+ * @ret_path: storage for encoded object path pointer
+ *
+ * Whenever we provide a bus API that allows clients to create and manage
+ * server-side objects, we need to provide a unique name for these objects. If
+ * we let the server choose the name, we suffer from a race condition: If a
+ * client creates an object asynchronously, it cannot destroy that object until
+ * it received the method reply. It cannot know the name of the new object,
+ * thus, it cannot destroy it. Furthermore, it enforces a round-trip.
+ *
+ * Therefore, many APIs allow the client to choose the unique name for newly
+ * created objects. There're two problems to solve, though:
+ * 1) Object names are usually defined via dbus object paths, which are
+ * usually globally namespaced. Therefore, multiple clients must be able
+ * to choose unique object names without interference.
+ * 2) If multiple libraries share the same bus connection, they must be
+ * able to choose unique object names without interference.
+ * The first problem is solved easily by prefixing a name with the
+ * unique-bus-name of a connection. The server side must enforce this and
+ * reject any other name. The second problem is solved by providing unique
+ * suffixes from within sd-bus.
+ *
+ * This helper allows clients to create unique object-paths. It uses the
+ * template '/prefix/sender_id/external_id' and returns the new path in
+ * @ret_path (must be freed by the caller).
+ * If @sender_id is NULL, the unique-name of @b is used. If @external_id is
+ * NULL, this function allocates a unique suffix via @b (by requesting a new
+ * cookie). If both @sender_id and @external_id are given, @b can be passed as
+ * NULL.
+ *
+ * Returns: 0 on success, negative error code on failure.
+ */
+int bus_path_encode_unique(sd_bus *b, const char *prefix, const char *sender_id, const char *external_id, char **ret_path) {
+ _cleanup_free_ char *sender_label = NULL, *external_label = NULL;
+ char external_buf[DECIMAL_STR_MAX(uint64_t)], *p;
+ int r;
+
+ assert_return(b || (sender_id && external_id), -EINVAL);
+ assert_return(object_path_is_valid(prefix), -EINVAL);
+ assert_return(ret_path, -EINVAL);
+
+ if (!sender_id) {
+ r = sd_bus_get_unique_name(b, &sender_id);
+ if (r < 0)
+ return r;
+ }
+
+ if (!external_id) {
+ xsprintf(external_buf, "%"PRIu64, ++b->cookie);
+ external_id = external_buf;
+ }
+
+ sender_label = bus_label_escape(sender_id);
+ if (!sender_label)
+ return -ENOMEM;
+
+ external_label = bus_label_escape(external_id);
+ if (!external_label)
+ return -ENOMEM;
+
+ p = strjoin(prefix, "/", sender_label, "/", external_label);
+ if (!p)
+ return -ENOMEM;
+
+ *ret_path = p;
+ return 0;
+}
+
+/**
+ * bus_path_decode_unique() - decode unique object path
+ * @path: object path to decode
+ * @prefix: object path prefix
+ * @ret_sender: output parameter for sender-id label
+ * @ret_external: output parameter for external-id label
+ *
+ * This does the reverse of bus_path_encode_unique() (see its description for
+ * details). Both trailing labels, sender-id and external-id, are unescaped and
+ * returned in the given output parameters (the caller must free them).
+ *
+ * Note that this function returns 0 if the path does not match the template
+ * (see bus_path_encode_unique()), 1 if it matched.
+ *
+ * Returns: Negative error code on failure, 0 if the given object path does not
+ * match the template (return parameters are set to NULL), 1 if it was
+ * parsed successfully (return parameters contain allocated labels).
+ */
+int bus_path_decode_unique(const char *path, const char *prefix, char **ret_sender, char **ret_external) {
+ const char *p, *q;
+ char *sender, *external;
+
+ assert(object_path_is_valid(path));
+ assert(object_path_is_valid(prefix));
+ assert(ret_sender);
+ assert(ret_external);
+
+ p = object_path_startswith(path, prefix);
+ if (!p) {
+ *ret_sender = NULL;
+ *ret_external = NULL;
+ return 0;
+ }
+
+ q = strchr(p, '/');
+ if (!q) {
+ *ret_sender = NULL;
+ *ret_external = NULL;
+ return 0;
+ }
+
+ sender = bus_label_unescape_n(p, q - p);
+ external = bus_label_unescape(q + 1);
+ if (!sender || !external) {
+ free(sender);
+ free(external);
+ return -ENOMEM;
+ }
+
+ *ret_sender = sender;
+ *ret_external = external;
+ return 1;
+}
+
+int bus_property_get_rlimit(
+ sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const char *property,
+ sd_bus_message *reply,
+ void *userdata,
+ sd_bus_error *error) {
+
+ const char *is_soft;
+ struct rlimit *rl;
+ uint64_t u;
+ rlim_t x;
+
+ assert(bus);
+ assert(reply);
+ assert(userdata);
+
+ is_soft = endswith(property, "Soft");
+
+ rl = *(struct rlimit**) userdata;
+ if (rl)
+ x = is_soft ? rl->rlim_cur : rl->rlim_max;
+ else {
+ struct rlimit buf = {};
+ const char *s, *p;
+ int z;
+
+ /* Chop off "Soft" suffix */
+ s = is_soft ? strndupa(property, is_soft - property) : property;
+
+ /* Skip over any prefix, such as "Default" */
+ assert_se(p = strstr(s, "Limit"));
+
+ z = rlimit_from_string(p + 5);
+ assert(z >= 0);
+
+ (void) getrlimit(z, &buf);
+ x = is_soft ? buf.rlim_cur : buf.rlim_max;
+ }
+
+ /* rlim_t might have different sizes, let's map RLIMIT_INFINITY to (uint64_t) -1, so that it is the same on all
+ * archs */
+ u = x == RLIM_INFINITY ? (uint64_t) -1 : (uint64_t) x;
+
+ return sd_bus_message_append(reply, "t", u);
+}
+
+int bus_track_add_name_many(sd_bus_track *t, char **l) {
+ int r = 0;
+ char **i;
+
+ assert(t);
+
+ /* Continues adding after failure, and returns the first failure. */
+
+ STRV_FOREACH(i, l) {
+ int k;
+
+ k = sd_bus_track_add_name(t, *i);
+ if (k < 0 && r >= 0)
+ r = k;
+ }
+
+ return r;
+}
+
+int bus_open_system_watch_bind_with_description(sd_bus **ret, const char *description) {
+ _cleanup_(sd_bus_close_unrefp) sd_bus *bus = NULL;
+ const char *e;
+ int r;
+
+ assert(ret);
+
+ /* Match like sd_bus_open_system(), but with the "watch_bind" feature and the Connected() signal turned on. */
+
+ r = sd_bus_new(&bus);
+ if (r < 0)
+ return r;
+
+ if (description) {
+ r = sd_bus_set_description(bus, description);
+ if (r < 0)
+ return r;
+ }
+
+ e = secure_getenv("DBUS_SYSTEM_BUS_ADDRESS");
+ if (!e)
+ e = DEFAULT_SYSTEM_BUS_ADDRESS;
+
+ r = sd_bus_set_address(bus, e);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_set_bus_client(bus, true);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_set_trusted(bus, true);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_negotiate_creds(bus, true, SD_BUS_CREDS_UID|SD_BUS_CREDS_EUID|SD_BUS_CREDS_EFFECTIVE_CAPS);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_set_watch_bind(bus, true);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_set_connected_signal(bus, true);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_start(bus);
+ if (r < 0)
+ return r;
+
+ *ret = TAKE_PTR(bus);
+
+ return 0;
+}
+
+int bus_reply_pair_array(sd_bus_message *m, char **l) {
+ _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
+ char **k, **v;
+ int r;
+
+ assert(m);
+
+ /* Reply to the specified message with a message containing a dictionary put together from the specified
+ * strv */
+
+ r = sd_bus_message_new_method_return(m, &reply);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_open_container(reply, 'a', "{ss}");
+ if (r < 0)
+ return r;
+
+ STRV_FOREACH_PAIR(k, v, l) {
+ r = sd_bus_message_append(reply, "{ss}", *k, *v);
+ if (r < 0)
+ return r;
+ }
+
+ r = sd_bus_message_close_container(reply);
+ if (r < 0)
+ return r;
+
+ return sd_bus_send(NULL, reply, NULL);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-08-13 13:08:25 +0000