src/bin/lttng/commands/version.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 <popt.h>
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23 #include <sys/stat.h>
  24 #include <sys/types.h>
  25 #include <unistd.h>
  26 #include <config.h>
  27
  28 #include "../command.h"
  29
  30 enum {
  31         OPT_HELP = 1,
  32         OPT_LIST_OPTIONS,
  33 };
  34
  35 static struct poptOption long_options[] = {
  36         /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
  37         {"help",      'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
  38         {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
  39         {0, 0, 0, 0, 0, 0, 0}
  40 };
  41
  42 /*
  43  * usage
  44  */
  45 static void usage(FILE *ofp)
  46 {
  47         fprintf(ofp, "usage: lttng version\n");
  48         fprintf(ofp, "\n");
  49         fprintf(ofp, "  -h, --help               Show this help\n");
  50         fprintf(ofp, "      --list-options       Simple listing of options\n");
  51         fprintf(ofp, "\n");
  52 }
  53
  54 /*
  55  *  cmd_version
  56  */
  57 int cmd_version(int argc, const char **argv)
  58 {
  59         int opt, ret = CMD_SUCCESS;
  60         static poptContext pc;
  61
  62         pc = poptGetContext(NULL, argc, argv, long_options, 0);
  63         poptReadDefaultConfig(pc, 0);
  64
  65         while ((opt = poptGetNextOpt(pc)) != -1) {
  66                 switch (opt) {
  67                 case OPT_HELP:
  68                         usage(stdout);
  69                         goto end;
  70                 case OPT_LIST_OPTIONS:
  71                         list_cmd_options(stdout, long_options);
  72                         goto end;
  73                 default:
  74                         usage(stderr);
  75                         ret = CMD_UNDEFINED;
  76                         goto end;
  77                 }
  78         }
  79
  80         MSG("lttng version " VERSION " - " VERSION_NAME);
  81         MSG("Web site: http://lttng.org/");
  82         MSG("\nlttng is free software and under the GPL license and part LGPL");
  83
  84 end:
  85         poptFreeContext(pc);
  86         return ret;
  87 }