+
+/**
+ * Performs kdbus query of id of the given name
+ *
+ * @param name name to query for
+ * @param transport transport
+ * @param pInfo nameInfo structure address to store info about the name
+ * @return 0 on success, -errno if failed
+ */
+int kdbus_NameQuery(const char* name, DBusTransport* transport, struct nameInfo* pInfo)
+{
+ struct kdbus_cmd_conn_info *cmd;
+ int ret;
+ int fd;
+ uint64_t size;
+ __u64 id = 0;
+
+ memset(pInfo, 0, sizeof(struct nameInfo));
+
+ if(!_dbus_transport_get_socket_fd(transport, &fd))
+ return -EPERM;
+
+ size = sizeof(struct kdbus_cmd_conn_info);
+ if((name[0] == ':') && (name[1] == '1') && (name[2] == '.')) /* if name starts with ":1." it is a unique name and should be send as number */
+ id = strtoull(&name[3], NULL, 10);
+ if(id == 0)
+ size += strlen(name) + 1;
+
+ cmd = alloca(size);
+ if (!cmd)
+ {
+ _dbus_verbose("Error allocating memory for: %s,%s\n", _dbus_strerror (errno), _dbus_error_from_errno (errno));
+ return -errno;
+ }
+
+ memset(cmd, 0, sizeof(struct kdbus_cmd_conn_info));
+ cmd->size = size;
+ cmd->id = id;
+ if(id == 0)
+ memcpy(cmd->name, name, strlen(name) + 1);
+
+ again:
+ ret = ioctl(fd, KDBUS_CMD_CONN_INFO, cmd);
+ if (ret < 0)
+ {
+ if(errno == EINTR)
+ goto again;
+ pInfo->uniqueId = 0;
+ return -errno;
+ }
+ else
+ {
+ struct kdbus_conn_info *info;
+ struct kdbus_item *item;
+
+ info = (struct kdbus_conn_info *)((char*)dbus_transport_get_pool_pointer(transport) + cmd->offset);
+ pInfo->uniqueId = info->id;
+
+ item = info->items;
+ while((uint8_t *)(item) < (uint8_t *)(info) + info->size)
+ {
+ if(item->type == KDBUS_ITEM_CREDS)
+ {
+ pInfo->userId = item->creds.uid;
+ pInfo->processId = item->creds.pid;
+ }
+
+ if(item->type == KDBUS_ITEM_SECLABEL)
+ {
+ pInfo->sec_label_len = item->size - KDBUS_ITEM_HEADER_SIZE - 1;
+ if(pInfo->sec_label_len != 0)
+ {
+ pInfo->sec_label = malloc(pInfo->sec_label_len);
+ if(pInfo->sec_label == NULL)
+ ret = -1;
+ else
+ memcpy(pInfo->sec_label, item->data, pInfo->sec_label_len);
+ }
+ }
+
+ item = KDBUS_PART_NEXT(item);
+ }
+
+ again2:
+ if (ioctl(fd, KDBUS_CMD_FREE, &cmd->offset) < 0)
+ {
+ if(errno == EINTR)
+ goto again2;
+ _dbus_verbose("kdbus error freeing pool: %d (%m)\n", errno);
+ return -errno;
+ }
+ }
+
+ return ret;
+}
+
+/*
+ * Asks kdbus for uid of the owner of the name given in the message
+ */
+dbus_bool_t kdbus_connection_get_unix_user(DBusConnection* connection, const char* name, unsigned long* uid, DBusError* error)
+{
+ struct nameInfo info;
+ int inter_ret;
+ dbus_bool_t ret = FALSE;
+
+ inter_ret = kdbus_NameQuery(name, dbus_connection_get_transport(connection), &info);
+ if(inter_ret == 0) //name found
+ {
+ _dbus_verbose("User id:%llu\n", (unsigned long long) info.userId);
+ *uid = info.userId;
+ return TRUE;
+ }
+ else if((inter_ret == -ENOENT) || (inter_ret == -ENXIO)) //name has no owner
+ {
+ _dbus_verbose ("Name %s has no owner.\n", name);
+ dbus_set_error (error, DBUS_ERROR_FAILED, "Could not get UID of name '%s': no such name", name);
+ }
+
+ else
+ {
+ _dbus_verbose("kdbus error determining UID: err %d (%m)\n", errno);
+ dbus_set_error (error, DBUS_ERROR_FAILED, "Could not determine UID for '%s'", name);
+ }
+
+ return ret;
+}
+
+/*
+ * Asks kdbus for pid of the owner of the name given in the message
+ */
+dbus_bool_t kdbus_connection_get_unix_process_id(DBusConnection* connection, const char* name, unsigned long* pid, DBusError* error)
+{
+ struct nameInfo info;
+ int inter_ret;
+ dbus_bool_t ret = FALSE;
+
+ inter_ret = kdbus_NameQuery(name, dbus_connection_get_transport(connection), &info);
+ if(inter_ret == 0) //name found
+ {
+ _dbus_verbose("Process id:%llu\n", (unsigned long long) info.processId);
+ *pid = info.processId;
+ return TRUE;
+ }
+ else if((inter_ret == -ENOENT) || (inter_ret == -ENXIO)) //name has no owner
+ dbus_set_error (error, DBUS_ERROR_FAILED, "Could not get PID of name '%s': no such name", name);
+ else
+ {
+ _dbus_verbose("kdbus error determining PID: err %d (%m)\n", errno);
+ dbus_set_error (error, DBUS_ERROR_FAILED, "Could not determine PID for '%s'", name);
+ }
+
+ return ret;
+}
projects / platform / upstream / dbus.git / commitdiff