src/bin/lttng/commands/status.c

   1 /*
   2  * Copyright (C) 2015 - Philippe Proulx <pproulx@efficios.com>
   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 "../command.h"
  28 #include "../utils.h"
  29 #include <config.h>
  30
  31 enum {
  32         OPT_HELP = 1,
  33         OPT_LIST_OPTIONS,
  34 };
  35
  36 static struct poptOption long_options[] = {
  37         /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
  38         {"help",        'h', POPT_ARG_NONE, NULL, OPT_HELP, NULL, NULL},
  39         {"list-options", 0,  POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
  40         {0, 0, 0, 0, 0, 0, 0}
  41 };
  42
  43 static void usage(FILE *ofp)
  44 {
  45         fprintf(ofp, "Usage: lttng status [options]\n");
  46         fprintf(ofp, "\n");
  47         fprintf(ofp, "Options:\n");
  48         fprintf(ofp, "  -h, --help          Show this help\n");
  49         fprintf(ofp, "      --list-options  List options\n");
  50 }
  51
  52 static int status(void)
  53 {
  54         const char *argv[2];
  55         int ret = CMD_SUCCESS;
  56         char *session_name = NULL;
  57
  58         session_name = get_session_name();
  59         if (!session_name) {
  60                 ret = CMD_ERROR;
  61                 goto end;
  62         }
  63
  64         argv[0] = "list";
  65         argv[1] = session_name;
  66         ret = cmd_list(2, argv);
  67 end:
  68         free(session_name);
  69         return ret;
  70 }
  71
  72 /*
  73  * The 'status <options>' first level command
  74  */
  75 int cmd_status(int argc, const char **argv)
  76 {
  77         int opt, ret = CMD_SUCCESS;
  78         static poptContext pc;
  79
  80         pc = poptGetContext(NULL, argc, argv, long_options, 0);
  81         poptReadDefaultConfig(pc, 0);
  82
  83         while ((opt = poptGetNextOpt(pc)) != -1) {
  84                 switch (opt) {
  85                 case OPT_HELP:
  86                         usage(stdout);
  87                         goto end;
  88                 case OPT_LIST_OPTIONS:
  89                         list_cmd_options(stdout, long_options);
  90                         goto end;
  91                 default:
  92                         usage(stderr);
  93                         ret = CMD_UNDEFINED;
  94                         goto end;
  95                 }
  96         }
  97
  98         if (poptPeekArg(pc) != NULL) {
  99                 ERR("This command does not accept positional arguments.\n");
 100                 usage(stderr);
 101                 ret = CMD_UNDEFINED;
 102                 goto end;
 103         }
 104
 105         ret = status();
 106 end:
 107         poptFreeContext(pc);
 108         return ret;
 109 }