src/bin/lttng/commands/set_session.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
  28 #include "../command.h"
  29
  30 static char *opt_session_name;
  31
  32 enum {
  33         OPT_HELP = 1,
  34 };
  35
  36 static struct poptOption long_options[] = {
  37         /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
  38         {"help",           'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
  39         {0, 0, 0, 0, 0, 0, 0}
  40 };
  41
  42 /*
  43  * usage
  44  */
  45 static void usage(FILE *ofp)
  46 {
  47         fprintf(ofp, "usage: lttng set-session NAME\n");
  48         fprintf(ofp, "\n");
  49         fprintf(ofp, "Options:\n");
  50         fprintf(ofp, "  -h, --help               Show this help\n");
  51         fprintf(ofp, "\n");
  52 }
  53
  54 /*
  55  *  set_session
  56  */
  57 static int set_session(void)
  58 {
  59         int ret = CMD_SUCCESS;
  60
  61         ret = config_init(opt_session_name);
  62         if (ret < 0) {
  63                 ERR("Unable to set session name");
  64                 ret = CMD_ERROR;
  65                 goto error;
  66         }
  67
  68         MSG("Session set to %s", opt_session_name);
  69         ret = CMD_SUCCESS;
  70
  71 error:
  72         return ret;
  73 }
  74
  75 /*
  76  *  cmd_set_session
  77  */
  78 int cmd_set_session(int argc, const char **argv)
  79 {
  80         int opt, ret = CMD_SUCCESS;
  81         static poptContext pc;
  82
  83         pc = poptGetContext(NULL, argc, argv, long_options, 0);
  84         poptReadDefaultConfig(pc, 0);
  85
  86         while ((opt = poptGetNextOpt(pc)) != -1) {
  87                 switch (opt) {
  88                 case OPT_HELP:
  89                         usage(stderr);
  90                         ret = CMD_SUCCESS;
  91                         goto end;
  92                 default:
  93                         usage(stderr);
  94                         ret = CMD_UNDEFINED;
  95                         goto end;
  96                 }
  97         }
  98
  99         opt_session_name = (char *) poptGetArg(pc);
 100         if (opt_session_name == NULL) {
 101                 ERR("Missing session name");
 102                 usage(stderr);
 103                 goto end;
 104         }
 105
 106         ret = set_session();
 107
 108 end:
 109         return ret;
 110 }