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_uuid;
  27 char *opt_create_session;
  28 char *opt_sessiond_path;
  29 char *opt_destroy_session;
  30 int opt_trace_kernel = 0;
  31 int opt_quiet = 0;
  32 int opt_verbose = 0;
  33 int opt_list_apps = 0;
  34 int opt_no_sessiond = 0;
  35 int opt_list_session = 0;
  36 pid_t opt_create_trace = 0;
  37 pid_t opt_start_trace = 0;
  38
  39 enum {
  40         OPT_HELP = 42,
  41 };
  42
  43 static struct poptOption long_options[] = {
  44         /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
  45         {"create-session",  'c',        POPT_ARG_STRING,        &opt_create_session, 0, 0, 0},
  46         {"create-trace",        'C',    POPT_ARG_INT,           &opt_create_trace, 0, 0, 0},
  47         {"destroy-session", 'd',        POPT_ARG_STRING,        &opt_destroy_session, 0, 0, 0},
  48         {"group",                       0,              POPT_ARG_STRING,        &opt_tracing_group, 0, 0},
  49         {"help",                        'h',    POPT_ARG_NONE,          0, OPT_HELP, 0, 0},
  50         {"kernel",                      0,              POPT_ARG_VAL,           &opt_trace_kernel, 1, 0, 0},
  51         {"list-apps",           'L',    POPT_ARG_VAL,           &opt_list_apps, 1, 0, 0},
  52         {"list-sessions",       'l',    POPT_ARG_VAL,           &opt_list_session, 1, 0, 0},
  53         {"no-kernel",           0,              POPT_ARG_VAL,           &opt_trace_kernel, 0, 0, 0},
  54         {"no-sessiond",         0,              POPT_ARG_VAL,           &opt_no_sessiond, 1, 0, 0},
  55         {"quiet",                       'q',    POPT_ARG_VAL,           &opt_quiet, 1, 0, 0},
  56         {"session",                     's',    POPT_ARG_STRING,        &opt_session_uuid, 0, 0, 0},
  57         {"sessiond-path",       0,              POPT_ARG_STRING,        &opt_sessiond_path, 0, 0, 0},
  58         {"start",                       0,              POPT_ARG_INT,           &opt_start_trace, 0, 0, 0},
  59         {"verbose",                     'v',    POPT_ARG_VAL,           &opt_verbose, 1, 0, 0},
  60         //{"session",                   0,              POPT_ARG_STRING | POPT_ARGFLAG_OPTIONAL, &opt_session_name, 0, 0},
  61         {0, 0, 0, 0, 0, 0, 0}
  62 };
  63
  64
  65 /*
  66  *      usage
  67  */
  68 static void usage(FILE *ofp)
  69 {
  70         fprintf(ofp, "LTTng Trace Control " VERSION"\n\n");
  71         fprintf(ofp, "usage : lttng [OPTION]\n");
  72         fprintf(ofp, "\n");
  73         fprintf(ofp, "Options:\n");
  74         fprintf(ofp, "  -v, --verbose                Verbose mode\n");
  75         fprintf(ofp, "  -q, --quiet                  Quiet mode\n");
  76         fprintf(ofp, "      --help                   Show help\n");
  77         fprintf(ofp, "      --group NAME             Unix tracing group name. (default: tracing)\n");
  78         fprintf(ofp, "      --no-sessiond            Don't spawn a session daemon\n");
  79         fprintf(ofp, "      --sessiond-path          Session daemon full path\n");
  80         fprintf(ofp, "\n");
  81         fprintf(ofp, "Session options:\n");
  82         fprintf(ofp, "  -c, --create-session NAME    Create a new session\n");
  83         fprintf(ofp, "  -l, --list-sessions          List all available sessions\n");
  84         fprintf(ofp, "  -s, --session UUID           Specify tracing session using UUID\n");
  85         fprintf(ofp, "  -d, --destroy-session=NAME   Destroy the session specified by NAME\n");
  86         fprintf(ofp, "\n");
  87         fprintf(ofp, "Tracing options:\n");
  88         //fprintf(ofp, "      --kernel               Enable kernel tracing\n");
  89         //fprintf(ofp, "      --no-kernel            Disable kernel tracing\n");
  90         fprintf(ofp, "  -L, --list-apps              List traceable UST applications\n");
  91         fprintf(ofp, "  -C, --create-trace PID       Create trace for PID\n");
  92         fprintf(ofp, "      --start PID              Start trace for PID\n");
  93         fprintf(ofp, "\n");
  94         fprintf(ofp, "Please see the lttng(1) man page for full documentation.\n");
  95         fprintf(ofp, "See http://lttng.org/ust for updates, bug reports and news.\n");
  96 }
  97
  98 /*
  99  *  parse_args
 100  *
 101  *  Parse command line arguments.
 102  *  Return 0 if OK, else -1
 103  */
 104 int parse_args(int argc, const char **argv)
 105 {
 106         static poptContext pc;
 107         int opt;
 108
 109         /* If no options, fail */
 110         if (argc < 2) {
 111                 return -1;
 112         }
 113
 114         pc = poptGetContext(NULL, argc, argv, long_options, 0);
 115         poptReadDefaultConfig(pc, 0);
 116
 117         while ((opt = poptGetNextOpt(pc)) != -1) {
 118                 switch (opt) {
 119                 case OPT_HELP:
 120                         usage(stderr);
 121                         clean_exit(EXIT_SUCCESS);
 122                         break;
 123                 default:
 124                         usage(stderr);
 125                         clean_exit(EXIT_FAILURE);
 126                         break;
 127                 }
 128         }
 129
 130         if (pc) {
 131                 poptFreeContext(pc);
 132         }
 133
 134         return 0;
 135 }