lttng/utils.c

   1 /*
   2  * Copyright (c)  2011 David Goulet <david.goulet@polymtl.ca>
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; only version 2
   7  * of the License.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18
  19 #include <stdlib.h>
  20
  21 #include <lttng/lttng.h>
  22
  23 #include "conf.h"
  24
  25 /*
  26  *  get_session_name
  27  *
  28  *  Return allocated string with the session name found in the config
  29  *  directory.
  30  */
  31 char *get_session_name(void)
  32 {
  33         char *path, *session_name = NULL;
  34
  35         /* Get path to config file */
  36         path = config_get_default_path();
  37         if (path == NULL) {
  38                 goto error;
  39         }
  40
  41         /* Get session name from config */
  42         session_name = config_read_session_name(path);
  43         if (session_name == NULL) {
  44                 goto error;
  45         }
  46
  47 error:
  48         return session_name;
  49 }
  50
  51 /*
  52  *  set_session_name
  53  *
  54  *  Get session name and set it for the lttng control lib.
  55  */
  56 int set_session_name(char *name)
  57 {
  58         int ret;
  59         char *session_name;
  60
  61         if (!name) {
  62                 session_name = get_session_name();
  63                 if (session_name == NULL) {
  64                         ret = -1;
  65                         goto error;
  66                 }
  67         } else {
  68                 session_name = name;
  69         }
  70
  71         lttng_set_session_name(session_name);
  72         if (!name)
  73                 free(session_name);
  74
  75         ret = 0;
  76
  77 error:
  78         return ret;
  79 }