src/bin/lttng-relayd/cmd-2-1.c

   1 /*
   2  * Copyright (C) 2013 - Julien Desfossez <jdesfossez@efficios.com>
   3  *                      David Goulet <dgoulet@efficios.com>
   4  *               2015 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License, version 2 only, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along with
  16  * this program; if not, write to the Free Software Foundation, Inc., 51
  17  * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  */
  19
  20 #define _LGPL_SOURCE
  21 #include <assert.h>
  22 #include <string.h>
  23
  24 #include <common/common.h>
  25 #include <common/sessiond-comm/relayd.h>
  26
  27 #include "cmd-generic.h"
  28 #include "cmd-2-1.h"
  29 #include "utils.h"
  30
  31 /*
  32  * cmd_recv_stream_2_1 allocates path_name and channel_name.
  33  */
  34 int cmd_recv_stream_2_1(struct relay_connection *conn,
  35                 char **ret_path_name, char **ret_channel_name)
  36 {
  37         int ret;
  38         struct lttcomm_relayd_add_stream stream_info;
  39         char *path_name = NULL;
  40         char *channel_name = NULL;
  41
  42         ret = cmd_recv(conn->sock, &stream_info, sizeof(stream_info));
  43         if (ret < 0) {
  44                 ERR("Unable to recv stream version 2.1");
  45                 goto error;
  46         }
  47
  48         path_name = create_output_path(stream_info.pathname);
  49         if (!path_name) {
  50                 PERROR("Path name allocation");
  51                 ret = -ENOMEM;
  52                 goto error;
  53         }
  54
  55         channel_name = strdup(stream_info.channel_name);
  56         if (!channel_name) {
  57                 ret = -errno;
  58                 PERROR("Path name allocation");
  59                 goto error;
  60         }
  61
  62         *ret_path_name = path_name;
  63         *ret_channel_name = channel_name;
  64         return 0;
  65 error:
  66         free(path_name);
  67         free(channel_name);
  68         return ret;
  69 }