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 _GNU_SOURCE
  19 #define _LGPL_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
  28 #include "../command.h"
  29 #include "../utils.h"
  30 #include <config.h>
  31
  32 enum {
  33         OPT_HELP = 1,
  34         OPT_LIST_OPTIONS,
  35 };
  36
  37 static struct poptOption long_options[] = {
  38         /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
  39         {"help",        'h', POPT_ARG_NONE, NULL, OPT_HELP, NULL, NULL},
  40         {"list-options", 0,  POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
  41         {0, 0, 0, 0, 0, 0, 0}
  42 };
  43
  44 static void usage(FILE *ofp)
  45 {
  46         fprintf(ofp, "Usage: lttng status [options]\n");
  47         fprintf(ofp, "\n");
  48         fprintf(ofp, "Options:\n");
  49         fprintf(ofp, "  -h, --help          Show this help\n");
  50         fprintf(ofp, "      --list-options  List options\n");
  51 }
  52
  53 static int status(void)
  54 {
  55         const char *argv[2];
  56         int ret = CMD_SUCCESS;
  57         char *session_name = NULL;
  58
  59         session_name = get_session_name();
  60         if (!session_name) {
  61                 ret = CMD_ERROR;
  62                 goto end;
  63         }
  64
  65         argv[0] = "list";
  66         argv[1] = session_name;
  67         ret = cmd_list(2, argv);
  68 end:
  69         free(session_name);
  70         return ret;
  71 }
  72
  73 /*
  74  * The 'status <options>' first level command
  75  */
  76 int cmd_status(int argc, const char **argv)
  77 {
  78         int opt, ret = CMD_SUCCESS;
  79         static poptContext pc;
  80
  81         pc = poptGetContext(NULL, argc, argv, long_options, 0);
  82         poptReadDefaultConfig(pc, 0);
  83
  84         while ((opt = poptGetNextOpt(pc)) != -1) {
  85                 switch (opt) {
  86                 case OPT_HELP:
  87                         usage(stdout);
  88                         goto end;
  89                 case OPT_LIST_OPTIONS:
  90                         list_cmd_options(stdout, long_options);
  91                         goto end;
  92                 default:
  93                         usage(stderr);
  94                         ret = CMD_UNDEFINED;
  95                         goto end;
  96                 }
  97         }
  98
  99         if (poptPeekArg(pc) != NULL) {
 100                 ERR("This command does not accept positional arguments.\n");
 101                 usage(stderr);
 102                 ret = CMD_UNDEFINED;
 103                 goto end;
 104         }
 105
 106         ret = status();
 107 end:
 108         poptFreeContext(pc);
 109         return ret;
 110 }