lttng/options.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; either version 2
   7  * of the License, or (at your option) any later version.
   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
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  17  */
  18
  19 #include <popt.h>
  20 #include <stdlib.h>
  21
  22 #include "lttng.h"
  23
  24 /* Option variables */
  25 char *opt_tracing_group;
  26 char *opt_session_name;
  27 char *opt_sessiond_path;
  28 int opt_trace_kernel = 0;
  29 int opt_quiet = 0;
  30 int opt_verbose = 0;
  31 int opt_list_apps = 0;
  32 int opt_no_sessiond = 0;
  33
  34 enum {
  35         OPT_HELP = 42,
  36 };
  37
  38 static struct poptOption long_options[] = {
  39         /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
  40         {"help",                        'h',    POPT_ARG_NONE,          0, OPT_HELP, 0, 0},
  41         {"group",                       0,              POPT_ARG_STRING,        &opt_tracing_group, 0, 0},
  42         {"kernel",                      0,              POPT_ARG_VAL,           &opt_trace_kernel, 1, 0, 0},
  43         {"no-kernel",           0,              POPT_ARG_VAL,           &opt_trace_kernel, 0, 0, 0},
  44         {"session",                     0,              POPT_ARG_STRING | POPT_ARGFLAG_OPTIONAL, &opt_session_name, 0, 0},
  45         {"quiet",                       'q',    POPT_ARG_VAL,           &opt_quiet, 1, 0},
  46         {"verbose",                     'v',    POPT_ARG_VAL,           &opt_verbose, 1, 0},
  47         {"list-apps",           'l',    POPT_ARG_VAL,           &opt_list_apps, 1, 0},
  48         {"no-sessiond",         0,              POPT_ARG_VAL,           &opt_no_sessiond, 1, 0},
  49         {"sessiond-path",       0,              POPT_ARG_STRING,        &opt_sessiond_path, 0, 0},
  50         {0, 0, 0, 0, 0, 0}
  51 };
  52
  53
  54 /*
  55  *      usage
  56  */
  57 static void usage(FILE *ofp)
  58 {
  59         fprintf(ofp, "LTTng Trace Control " VERSION"\n\n");
  60         fprintf(ofp, "usage : lttng [OPTION]\n");
  61         fprintf(ofp, "\n");
  62         fprintf(ofp, "Options:\n");
  63         fprintf(ofp, "  -v, --verbose           Verbose mode\n");
  64         fprintf(ofp, "  -q, --quiet             Quiet mode\n");
  65         fprintf(ofp, "      --help              Show help\n");
  66         fprintf(ofp, "      --group NAME        Unix tracing group name. (default: tracing)\n");
  67         fprintf(ofp, "      --no-sessiond       Don't spawn a session daemon.\n");
  68         fprintf(ofp, "      --sessiond-path     Session daemon full path\n");
  69         fprintf(ofp, "\n");
  70         fprintf(ofp, "Tracing options:\n");
  71         //fprintf(ofp, "      --session [NAME]    Specify tracing session. If no NAME is given\n");
  72         //fprintf(ofp, "                          or option is ommited, a session will be created\n");
  73         //fprintf(ofp, "      --kernel            Enable kernel tracing\n");
  74         //fprintf(ofp, "      --no-kernel         Disable kernel tracing\n");
  75         fprintf(ofp, "  -l, --list-apps         List traceable UST applications\n");
  76 }
  77
  78 /*
  79  *  parse_args
  80  *
  81  *  Parse command line arguments.
  82  *  Return 0 if OK, else -1
  83  */
  84 int parse_args(int argc, const char **argv)
  85 {
  86         static poptContext pc;
  87         int opt;
  88
  89         pc = poptGetContext("lttng", argc, argv, long_options, 0);
  90         poptReadDefaultConfig(pc, 0);
  91
  92         while ((opt = poptGetNextOpt(pc)) != -1) {
  93                 switch (opt) {
  94                 case OPT_HELP:
  95                         usage(stderr);
  96                         clean_exit(EXIT_SUCCESS);
  97                         break;
  98                 default:
  99                         usage(stderr);
 100                         clean_exit(EXIT_FAILURE);
 101                         break;
 102                 }
 103         }
 104
 105         if (pc) {
 106                 poptFreeContext(pc);
 107         }
 108
 109         return 0;
 110 }