1794 lines
54 KiB
C
1794 lines
54 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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#include <errno.h>
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#include <fcntl.h>
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#include <inttypes.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/ioctl.h>
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#include <sys/resource.h>
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#include <sys/socket.h>
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#include <unistd.h>
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#include "sd-bus-protocol.h"
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#include "sd-bus.h"
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#include "sd-daemon.h"
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#include "sd-event.h"
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#include "sd-id128.h"
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#include "alloc-util.h"
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#include "bus-internal.h"
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#include "bus-label.h"
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#include "bus-message.h"
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#include "bus-util.h"
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#include "cap-list.h"
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#include "cgroup-util.h"
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#include "def.h"
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#include "escape.h"
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#include "fd-util.h"
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#include "missing.h"
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#include "mount-util.h"
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#include "nsflags.h"
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#include "parse-util.h"
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#include "proc-cmdline.h"
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#include "rlimit-util.h"
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#include "stdio-util.h"
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#include "strv.h"
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#include "user-util.h"
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static int name_owner_change_callback(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
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sd_event *e = userdata;
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assert(m);
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assert(e);
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sd_bus_close(sd_bus_message_get_bus(m));
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sd_event_exit(e, 0);
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return 1;
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}
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int bus_async_unregister_and_exit(sd_event *e, sd_bus *bus, const char *name) {
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const char *match;
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const char *unique;
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int r;
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assert(e);
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assert(bus);
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assert(name);
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/* We unregister the name here and then wait for the
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* NameOwnerChanged signal for this event to arrive before we
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* quit. We do this in order to make sure that any queued
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* requests are still processed before we really exit. */
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r = sd_bus_get_unique_name(bus, &unique);
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if (r < 0)
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return r;
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match = strjoina(
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"sender='org.freedesktop.DBus',"
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"type='signal',"
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"interface='org.freedesktop.DBus',"
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"member='NameOwnerChanged',"
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"path='/org/freedesktop/DBus',"
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"arg0='", name, "',",
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"arg1='", unique, "',",
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"arg2=''");
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r = sd_bus_add_match_async(bus, NULL, match, name_owner_change_callback, NULL, e);
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if (r < 0)
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return r;
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r = sd_bus_release_name_async(bus, NULL, name, NULL, NULL);
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if (r < 0)
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return r;
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return 0;
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}
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int bus_event_loop_with_idle(
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sd_event *e,
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sd_bus *bus,
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const char *name,
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usec_t timeout,
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check_idle_t check_idle,
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void *userdata) {
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bool exiting = false;
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int r, code;
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assert(e);
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assert(bus);
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assert(name);
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for (;;) {
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bool idle;
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r = sd_event_get_state(e);
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if (r < 0)
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return r;
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if (r == SD_EVENT_FINISHED)
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break;
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if (check_idle)
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idle = check_idle(userdata);
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else
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idle = true;
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r = sd_event_run(e, exiting || !idle ? (uint64_t) -1 : timeout);
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if (r < 0)
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return r;
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if (r == 0 && !exiting && idle) {
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r = sd_bus_try_close(bus);
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if (r == -EBUSY)
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continue;
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/* Fallback for dbus1 connections: we
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* unregister the name and wait for the
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* response to come through for it */
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if (r == -EOPNOTSUPP) {
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/* Inform the service manager that we
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* are going down, so that it will
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* queue all further start requests,
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* instead of assuming we are already
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* running. */
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sd_notify(false, "STOPPING=1");
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r = bus_async_unregister_and_exit(e, bus, name);
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if (r < 0)
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return r;
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exiting = true;
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continue;
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}
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if (r < 0)
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return r;
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sd_event_exit(e, 0);
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break;
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}
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}
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r = sd_event_get_exit_code(e, &code);
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if (r < 0)
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return r;
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return code;
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}
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int bus_name_has_owner(sd_bus *c, const char *name, sd_bus_error *error) {
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_cleanup_(sd_bus_message_unrefp) sd_bus_message *rep = NULL;
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int r, has_owner = 0;
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assert(c);
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assert(name);
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r = sd_bus_call_method(c,
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"org.freedesktop.DBus",
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"/org/freedesktop/dbus",
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"org.freedesktop.DBus",
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"NameHasOwner",
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error,
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&rep,
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"s",
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name);
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if (r < 0)
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return r;
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r = sd_bus_message_read_basic(rep, 'b', &has_owner);
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if (r < 0)
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return sd_bus_error_set_errno(error, r);
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return has_owner;
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}
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static int check_good_user(sd_bus_message *m, uid_t good_user) {
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_cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
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uid_t sender_uid;
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int r;
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assert(m);
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if (good_user == UID_INVALID)
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return 0;
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r = sd_bus_query_sender_creds(m, SD_BUS_CREDS_EUID, &creds);
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if (r < 0)
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return r;
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/* Don't trust augmented credentials for authorization */
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assert_return((sd_bus_creds_get_augmented_mask(creds) & SD_BUS_CREDS_EUID) == 0, -EPERM);
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r = sd_bus_creds_get_euid(creds, &sender_uid);
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if (r < 0)
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return r;
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return sender_uid == good_user;
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}
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int bus_test_polkit(
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sd_bus_message *call,
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int capability,
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const char *action,
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const char **details,
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uid_t good_user,
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bool *_challenge,
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sd_bus_error *e) {
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int r;
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assert(call);
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assert(action);
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/* Tests non-interactively! */
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r = check_good_user(call, good_user);
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if (r != 0)
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return r;
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r = sd_bus_query_sender_privilege(call, capability);
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if (r < 0)
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return r;
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else if (r > 0)
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return 1;
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#if ENABLE_POLKIT
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else {
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_cleanup_(sd_bus_message_unrefp) sd_bus_message *request = NULL;
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_cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
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int authorized = false, challenge = false;
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const char *sender, **k, **v;
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sender = sd_bus_message_get_sender(call);
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if (!sender)
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return -EBADMSG;
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r = sd_bus_message_new_method_call(
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call->bus,
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&request,
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"org.freedesktop.PolicyKit1",
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"/org/freedesktop/PolicyKit1/Authority",
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"org.freedesktop.PolicyKit1.Authority",
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"CheckAuthorization");
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if (r < 0)
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return r;
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r = sd_bus_message_append(
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request,
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"(sa{sv})s",
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"system-bus-name", 1, "name", "s", sender,
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action);
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if (r < 0)
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return r;
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r = sd_bus_message_open_container(request, 'a', "{ss}");
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if (r < 0)
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return r;
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STRV_FOREACH_PAIR(k, v, details) {
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r = sd_bus_message_append(request, "{ss}", *k, *v);
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if (r < 0)
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return r;
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}
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r = sd_bus_message_close_container(request);
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if (r < 0)
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return r;
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r = sd_bus_message_append(request, "us", 0, NULL);
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if (r < 0)
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return r;
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r = sd_bus_call(call->bus, request, 0, e, &reply);
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if (r < 0) {
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/* Treat no PK available as access denied */
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if (sd_bus_error_has_name(e, SD_BUS_ERROR_SERVICE_UNKNOWN)) {
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sd_bus_error_free(e);
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return -EACCES;
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}
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return r;
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}
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r = sd_bus_message_enter_container(reply, 'r', "bba{ss}");
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if (r < 0)
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return r;
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r = sd_bus_message_read(reply, "bb", &authorized, &challenge);
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if (r < 0)
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return r;
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if (authorized)
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return 1;
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if (_challenge) {
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*_challenge = challenge;
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return 0;
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}
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}
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#endif
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return -EACCES;
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}
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#if ENABLE_POLKIT
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typedef struct AsyncPolkitQuery {
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sd_bus_message *request, *reply;
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sd_bus_message_handler_t callback;
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void *userdata;
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sd_bus_slot *slot;
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Hashmap *registry;
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} AsyncPolkitQuery;
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static void async_polkit_query_free(AsyncPolkitQuery *q) {
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if (!q)
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return;
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sd_bus_slot_unref(q->slot);
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if (q->registry && q->request)
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hashmap_remove(q->registry, q->request);
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sd_bus_message_unref(q->request);
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sd_bus_message_unref(q->reply);
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free(q);
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}
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static int async_polkit_callback(sd_bus_message *reply, void *userdata, sd_bus_error *error) {
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_cleanup_(sd_bus_error_free) sd_bus_error error_buffer = SD_BUS_ERROR_NULL;
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AsyncPolkitQuery *q = userdata;
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int r;
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assert(reply);
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assert(q);
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q->slot = sd_bus_slot_unref(q->slot);
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q->reply = sd_bus_message_ref(reply);
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r = sd_bus_message_rewind(q->request, true);
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if (r < 0) {
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r = sd_bus_reply_method_errno(q->request, r, NULL);
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goto finish;
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}
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r = q->callback(q->request, q->userdata, &error_buffer);
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r = bus_maybe_reply_error(q->request, r, &error_buffer);
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finish:
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async_polkit_query_free(q);
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return r;
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}
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#endif
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int bus_verify_polkit_async(
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sd_bus_message *call,
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int capability,
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const char *action,
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const char **details,
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bool interactive,
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uid_t good_user,
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Hashmap **registry,
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sd_bus_error *error) {
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#if ENABLE_POLKIT
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_cleanup_(sd_bus_message_unrefp) sd_bus_message *pk = NULL;
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AsyncPolkitQuery *q;
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const char *sender, **k, **v;
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sd_bus_message_handler_t callback;
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void *userdata;
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int c;
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#endif
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int r;
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assert(call);
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assert(action);
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assert(registry);
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r = check_good_user(call, good_user);
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if (r != 0)
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return r;
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#if ENABLE_POLKIT
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q = hashmap_get(*registry, call);
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if (q) {
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int authorized, challenge;
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/* This is the second invocation of this function, and
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* there's already a response from polkit, let's
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* process it */
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assert(q->reply);
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if (sd_bus_message_is_method_error(q->reply, NULL)) {
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const sd_bus_error *e;
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/* Copy error from polkit reply */
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e = sd_bus_message_get_error(q->reply);
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sd_bus_error_copy(error, e);
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/* Treat no PK available as access denied */
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if (sd_bus_error_has_name(e, SD_BUS_ERROR_SERVICE_UNKNOWN))
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return -EACCES;
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return -sd_bus_error_get_errno(e);
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}
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r = sd_bus_message_enter_container(q->reply, 'r', "bba{ss}");
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if (r >= 0)
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r = sd_bus_message_read(q->reply, "bb", &authorized, &challenge);
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if (r < 0)
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return r;
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if (authorized)
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return 1;
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if (challenge)
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return sd_bus_error_set(error, SD_BUS_ERROR_INTERACTIVE_AUTHORIZATION_REQUIRED, "Interactive authentication required.");
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return -EACCES;
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}
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#endif
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r = sd_bus_query_sender_privilege(call, capability);
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if (r < 0)
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return r;
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else if (r > 0)
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return 1;
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#if ENABLE_POLKIT
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if (sd_bus_get_current_message(call->bus) != call)
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return -EINVAL;
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callback = sd_bus_get_current_handler(call->bus);
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if (!callback)
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return -EINVAL;
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userdata = sd_bus_get_current_userdata(call->bus);
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sender = sd_bus_message_get_sender(call);
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if (!sender)
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return -EBADMSG;
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c = sd_bus_message_get_allow_interactive_authorization(call);
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if (c < 0)
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return c;
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if (c > 0)
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interactive = true;
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r = hashmap_ensure_allocated(registry, NULL);
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if (r < 0)
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return r;
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r = sd_bus_message_new_method_call(
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call->bus,
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&pk,
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"org.freedesktop.PolicyKit1",
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"/org/freedesktop/PolicyKit1/Authority",
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"org.freedesktop.PolicyKit1.Authority",
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"CheckAuthorization");
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if (r < 0)
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return r;
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r = sd_bus_message_append(
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pk,
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"(sa{sv})s",
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"system-bus-name", 1, "name", "s", sender,
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action);
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if (r < 0)
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return r;
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r = sd_bus_message_open_container(pk, 'a', "{ss}");
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if (r < 0)
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return r;
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STRV_FOREACH_PAIR(k, v, details) {
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r = sd_bus_message_append(pk, "{ss}", *k, *v);
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if (r < 0)
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return r;
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}
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r = sd_bus_message_close_container(pk);
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if (r < 0)
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return r;
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|
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r = sd_bus_message_append(pk, "us", interactive, NULL);
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if (r < 0)
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return r;
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|
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q = new0(AsyncPolkitQuery, 1);
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if (!q)
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return -ENOMEM;
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|
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q->request = sd_bus_message_ref(call);
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q->callback = callback;
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q->userdata = userdata;
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|
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r = hashmap_put(*registry, call, q);
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if (r < 0) {
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async_polkit_query_free(q);
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return r;
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}
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q->registry = *registry;
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|
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r = sd_bus_call_async(call->bus, &q->slot, pk, async_polkit_callback, q, 0);
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if (r < 0) {
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async_polkit_query_free(q);
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return r;
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}
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|
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return 0;
|
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#endif
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|
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return -EACCES;
|
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}
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|
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void bus_verify_polkit_async_registry_free(Hashmap *registry) {
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#if ENABLE_POLKIT
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hashmap_free_with_destructor(registry, async_polkit_query_free);
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#endif
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}
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|
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int bus_check_peercred(sd_bus *c) {
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struct ucred ucred;
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int fd, r;
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|
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assert(c);
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fd = sd_bus_get_fd(c);
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if (fd < 0)
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return fd;
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r = getpeercred(fd, &ucred);
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if (r < 0)
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return r;
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|
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if (ucred.uid != 0 && ucred.uid != geteuid())
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return -EPERM;
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|
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return 1;
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}
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|
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int bus_connect_system_systemd(sd_bus **_bus) {
|
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_cleanup_(sd_bus_unrefp) sd_bus *bus = NULL;
|
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int r;
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|
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assert(_bus);
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|
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if (geteuid() != 0)
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return sd_bus_default_system(_bus);
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|
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/* If we are root then let's talk directly to the system
|
|
* instance, instead of going via the bus */
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|
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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_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_message_map_properties_changed(
|
|
sd_bus_message *m,
|
|
const struct bus_properties_map *map,
|
|
unsigned flags,
|
|
sd_bus_error *error,
|
|
void *userdata) {
|
|
|
|
const char *member;
|
|
int r, invalidated, i;
|
|
|
|
assert(m);
|
|
assert(map);
|
|
|
|
r = bus_message_map_all_properties(m, map, flags, error, userdata);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, "s");
|
|
if (r < 0)
|
|
return r;
|
|
|
|
invalidated = 0;
|
|
while ((r = sd_bus_message_read_basic(m, SD_BUS_TYPE_STRING, &member)) > 0)
|
|
for (i = 0; map[i].member; i++)
|
|
if (streq(map[i].member, member)) {
|
|
++invalidated;
|
|
break;
|
|
}
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_bus_message_exit_container(m);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return invalidated;
|
|
}
|
|
|
|
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_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. */
|
|
log_error("System has not been booted with systemd as init system (PID 1). Can't operate.");
|
|
|
|
return -EHOSTDOWN;
|
|
}
|
|
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_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);
|
|
}
|