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
   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
  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 #define _GNU_SOURCE
  20 #include <popt.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <sys/stat.h>
  25 #include <sys/types.h>
  26 #include <unistd.h>
  27 #include <config.h>
  28
  29 #include "../cmd.h"
  30
  31 enum {
  32         OPT_HELP = 1,
  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         {0, 0, 0, 0, 0, 0, 0}
  39 };
  40
  41 /*
  42  * usage
  43  */
  44 static void usage(FILE *ofp)
  45 {
  46         fprintf(ofp, "usage: lttng version\n");
  47         fprintf(ofp, "\n");
  48         fprintf(ofp, "  -h, --help               Show this help\n");
  49         fprintf(ofp, "\n");
  50 }
  51
  52 /*
  53  *  cmd_version
  54  */
  55 int cmd_version(int argc, const char **argv)
  56 {
  57         int opt, ret = CMD_SUCCESS;
  58         static poptContext pc;
  59
  60         pc = poptGetContext(NULL, argc, argv, long_options, 0);
  61         poptReadDefaultConfig(pc, 0);
  62
  63         while ((opt = poptGetNextOpt(pc)) != -1) {
  64                 switch (opt) {
  65                 case OPT_HELP:
  66                         usage(stderr);
  67                         ret = CMD_SUCCESS;
  68                         goto end;
  69                 default:
  70                         usage(stderr);
  71                         ret = CMD_UNDEFINED;
  72                         goto end;
  73                 }
  74         }
  75
  76         MSG("lttng version " VERSION);
  77         MSG("Web site: http://lttng.org/");
  78         MSG("\nlttng is free software and under the GPL license.");
  79
  80 end:
  81         return ret;
  82 }