src/bin/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 modify
   5  * it under the terms of the GNU General Public License, version 2 only,
   6  * as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  16  */
  17
  18 #define _GNU_SOURCE
  19 #include <stdlib.h>
  20 #include <ctype.h>
  21 #include <limits.h>
  22
  23 #include <common/error.h>
  24
  25 #include "conf.h"
  26 #include "utils.h"
  27
  28 /*
  29  *  get_session_name
  30  *
  31  *  Return allocated string with the session name found in the config
  32  *  directory.
  33  */
  34 char *get_session_name(void)
  35 {
  36         char *path, *session_name = NULL;
  37
  38         /* Get path to config file */
  39         path = config_get_default_path();
  40         if (path == NULL) {
  41                 goto error;
  42         }
  43
  44         /* Get session name from config */
  45         session_name = config_read_session_name(path);
  46         if (session_name == NULL) {
  47                 goto error;
  48         }
  49
  50         DBG2("Config file path found: %s", path);
  51         DBG("Session name found: %s", session_name);
  52         return session_name;
  53
  54 error:
  55         return NULL;
  56 }
  57
  58
  59 /*
  60  * list_cmd_options
  61  *
  62  * Prints a simple list of the options available to a command. This is intended
  63  * to be easily parsed for bash completion.
  64  */
  65 void list_cmd_options(FILE *ofp, struct poptOption *options)
  66 {
  67         int i;
  68         struct poptOption *option = NULL;
  69
  70         for (i = 0; options[i].longName != NULL; i++) {
  71                 option = &options[i];
  72
  73                 fprintf(ofp, "--%s\n", option->longName);
  74
  75                 if (isprint(option->shortName)) {
  76                         fprintf(ofp, "-%c\n", option->shortName);
  77                 }
  78         }
  79 }