src/bin/lttng/commands/version.c

   1 /*
   2  * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
   3  *
   4  * SPDX-License-Identifier: GPL-2.0-only
   5  *
   6  */
   7
   8 #define _LGPL_SOURCE
   9 #include <popt.h>
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include <string.h>
  13 #include <sys/stat.h>
  14 #include <sys/types.h>
  15 #include <unistd.h>
  16
  17 #include <common/mi-lttng.h>
  18
  19 #include "../command.h"
  20 #include "version.h"
  21
  22 #ifdef LTTNG_EMBED_HELP
  23 static const char help_msg[] =
  24 #include <lttng-version.1.h>
  25 ;
  26 #endif
  27
  28 enum {
  29         OPT_HELP = 1,
  30         OPT_LIST_OPTIONS,
  31 };
  32
  33 static const char *lttng_license = "lttng is free software and under the GPL license and part LGPL";
  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  *  create_version
  44  */
  45 static void create_version(struct mi_lttng_version *version)
  46 {
  47         strncpy(version->version, VERSION, NAME_MAX);
  48         version->version_major = VERSION_MAJOR;
  49         version->version_minor = VERSION_MINOR;
  50         version->version_patchlevel = VERSION_PATCHLEVEL;
  51         strncpy(version->version_commit, GIT_VERSION, NAME_MAX);
  52         strncpy(version->version_name, VERSION_NAME, NAME_MAX);
  53         strncpy(version->package_url, PACKAGE_URL, NAME_MAX);
  54 }
  55
  56 /*
  57  * Print the machine interface output of this command.
  58  */
  59 static int print_mi(void)
  60 {
  61         int ret = CMD_SUCCESS;
  62         struct mi_writer *writer = NULL;
  63         struct mi_lttng_version version;
  64
  65         create_version(&version);
  66
  67         writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
  68         if (!writer) {
  69                 ret = -LTTNG_ERR_NOMEM;
  70                 goto end;
  71         }
  72
  73         /* Open the command element */
  74         ret = mi_lttng_writer_command_open(writer,
  75                         mi_lttng_element_command_version);
  76         if (ret) {
  77                 ret = CMD_ERROR;
  78                 goto error;
  79         }
  80
  81         /* Beginning of output */
  82         ret = mi_lttng_writer_open_element(writer,
  83                         mi_lttng_element_command_output);
  84         if (ret) {
  85                 ret = CMD_ERROR;
  86                 goto error;
  87         }
  88
  89         /* Print the machine interface of version */
  90         ret = mi_lttng_version(writer, &version,
  91                         VERSION_DESCRIPTION, lttng_license);
  92         if (ret) {
  93                 ret = CMD_ERROR;
  94                 goto error;
  95         }
  96
  97         /* Close the output element */
  98         ret = mi_lttng_writer_close_element(writer);
  99         if (ret) {
 100                 ret = CMD_ERROR;
 101                 goto error;
 102         }
 103
 104         /* Close the command  */
 105         ret = mi_lttng_writer_command_close(writer);
 106         if (ret) {
 107                 ret = CMD_ERROR;
 108         }
 109
 110 error:
 111         /* Cleanup */
 112         if (writer && mi_lttng_writer_destroy(writer)) {
 113                 /* Preserve original error code */
 114                 ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL;
 115         }
 116
 117 end:
 118         return ret;
 119 }
 120
 121 /*
 122  *  cmd_version
 123  */
 124 int cmd_version(int argc, const char **argv)
 125 {
 126         int opt, ret = CMD_SUCCESS;
 127         static poptContext pc;
 128
 129         pc = poptGetContext(NULL, argc, argv, long_options, 0);
 130         poptReadDefaultConfig(pc, 0);
 131
 132         while ((opt = poptGetNextOpt(pc)) != -1) {
 133                 switch (opt) {
 134                 case OPT_HELP:
 135                         SHOW_HELP();
 136                         goto end;
 137                 case OPT_LIST_OPTIONS:
 138                         list_cmd_options(stdout, long_options);
 139                         goto end;
 140                 default:
 141                         ret = CMD_UNDEFINED;
 142                         goto end;
 143                 }
 144         }
 145
 146         if (lttng_opt_mi) {
 147                 ret = print_mi();
 148         } else {
 149                 MSG("lttng version " VERSION " - " VERSION_NAME "%s",
 150                         GIT_VERSION[0] == '\0' ? "" : " - " GIT_VERSION);
 151                 MSG("\n" VERSION_DESCRIPTION "\n");
 152                 MSG("Web site: https://lttng.org");
 153                 MSG("\n%s", lttng_license);
 154                 if (EXTRA_VERSION_NAME[0] != '\0') {
 155                         MSG("\nExtra version name: " EXTRA_VERSION_NAME);
 156                 }
 157                 if (EXTRA_VERSION_DESCRIPTION[0] != '\0') {
 158                         MSG("\nExtra version description:\n\t" EXTRA_VERSION_DESCRIPTION);
 159                 }
 160                 if (EXTRA_VERSION_PATCHES[0] != '\0') {
 161                         MSG("\nExtra version patches:\n\t" EXTRA_VERSION_PATCHES);
 162                 }
 163         }
 164
 165 end:
 166         poptFreeContext(pc);
 167         return ret;
 168 }