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 _LGPL_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
  27 #include <common/mi-lttng.h>
  28
  29 #include "../command.h"
  30
  31 enum {
  32         OPT_HELP = 1,
  33         OPT_LIST_OPTIONS,
  34 };
  35
  36 static const char *lttng_license = "lttng is free software and under the GPL license and part LGPL";
  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         {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
  42         {0, 0, 0, 0, 0, 0, 0}
  43 };
  44
  45 /*
  46  *  create_version
  47  */
  48 static void create_version(struct mi_lttng_version *version)
  49 {
  50         strncpy(version->version, VERSION, NAME_MAX);
  51         version->version_major = VERSION_MAJOR;
  52         version->version_minor = VERSION_MINOR;
  53         version->version_patchlevel = VERSION_PATCHLEVEL;
  54         strncpy(version->version_commit, GIT_VERSION, NAME_MAX);
  55         strncpy(version->version_name, VERSION_NAME, NAME_MAX);
  56         strncpy(version->package_url, PACKAGE_URL, NAME_MAX);
  57 }
  58
  59 /*
  60  * Print the machine interface output of this command.
  61  */
  62 static int print_mi()
  63 {
  64         int ret = CMD_SUCCESS;
  65         struct mi_writer *writer = NULL;
  66         struct mi_lttng_version version;
  67
  68         create_version(&version);
  69
  70         writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
  71         if (!writer) {
  72                 ret = -LTTNG_ERR_NOMEM;
  73                 goto end;
  74         }
  75
  76         /* Open the command element */
  77         ret = mi_lttng_writer_command_open(writer,
  78                         mi_lttng_element_command_version);
  79         if (ret) {
  80                 ret = CMD_ERROR;
  81                 goto error;
  82         }
  83
  84         /* Beginning of output */
  85         ret = mi_lttng_writer_open_element(writer,
  86                         mi_lttng_element_command_output);
  87         if (ret) {
  88                 ret = CMD_ERROR;
  89                 goto error;
  90         }
  91
  92         /* Print the machine interface of version */
  93         ret = mi_lttng_version(writer, &version,
  94                         VERSION_DESCRIPTION, lttng_license);
  95         if (ret) {
  96                 ret = CMD_ERROR;
  97                 goto error;
  98         }
  99
 100         /* Close the output element */
 101         ret = mi_lttng_writer_close_element(writer);
 102         if (ret) {
 103                 ret = CMD_ERROR;
 104                 goto error;
 105         }
 106
 107         /* Close the command  */
 108         ret = mi_lttng_writer_command_close(writer);
 109         if (ret) {
 110                 ret = CMD_ERROR;
 111         }
 112
 113 error:
 114         /* Cleanup */
 115         if (writer && mi_lttng_writer_destroy(writer)) {
 116                 /* Preserve original error code */
 117                 ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL;
 118         }
 119
 120 end:
 121         return ret;
 122 }
 123
 124 /*
 125  *  cmd_version
 126  */
 127 int cmd_version(int argc, const char **argv)
 128 {
 129         int opt, ret = CMD_SUCCESS;
 130         static poptContext pc;
 131
 132         pc = poptGetContext(NULL, argc, argv, long_options, 0);
 133         poptReadDefaultConfig(pc, 0);
 134
 135         while ((opt = poptGetNextOpt(pc)) != -1) {
 136                 switch (opt) {
 137                 case OPT_HELP:
 138                         SHOW_HELP();
 139                         goto end;
 140                 case OPT_LIST_OPTIONS:
 141                         list_cmd_options(stdout, long_options);
 142                         goto end;
 143                 default:
 144                         ret = CMD_UNDEFINED;
 145                         goto end;
 146                 }
 147         }
 148
 149         if (lttng_opt_mi) {
 150                 ret = print_mi();
 151         } else {
 152                 MSG("lttng version " VERSION " - " VERSION_NAME "%s",
 153                         GIT_VERSION[0] == '\0' ? "" : " - " GIT_VERSION);
 154                 MSG("\n" VERSION_DESCRIPTION "\n");
 155                 MSG("Web site: http://lttng.org");
 156                 MSG("\n%s", lttng_license);
 157         }
 158
 159 end:
 160         poptFreeContext(pc);
 161         return ret;
 162 }