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 "../cmd.h"
  29 #include "../conf.h"
  30 #include "../utils.h"
  31
  32 static char *opt_session_name;
  33
  34 enum {
  35         OPT_HELP = 1,
  36 };
  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         {0, 0, 0, 0, 0, 0, 0}
  42 };
  43
  44 /*
  45  * usage
  46  */
  47 static void usage(FILE *ofp)
  48 {
  49         fprintf(ofp, "usage: lttng set-session NAME\n");
  50         fprintf(ofp, "\n");
  51         fprintf(ofp, "Options:\n");
  52         fprintf(ofp, "  -h, --help               Show this help\n");
  53         fprintf(ofp, "\n");
  54 }
  55
  56 /*
  57  *  set_session
  58  */
  59 static int set_session(void)
  60 {
  61         int ret = CMD_SUCCESS;
  62         char *path;
  63
  64         path = config_get_default_path();
  65         if (path == NULL) {
  66                 ret = -1;
  67                 goto error;
  68         }
  69
  70         ret = config_add_session_name(path, opt_session_name);
  71         if (ret < 0) {
  72                 ERR("Unable to add session name to config");
  73                 ret = CMD_ERROR;
  74                 goto error;
  75         }
  76
  77         MSG("Session set to %s", opt_session_name);
  78         ret = CMD_SUCCESS;
  79
  80 error:
  81         return ret;
  82 }
  83
  84 /*
  85  *  cmd_set_session
  86  */
  87 int cmd_set_session(int argc, const char **argv)
  88 {
  89         int opt, ret = CMD_SUCCESS;
  90         static poptContext pc;
  91
  92         pc = poptGetContext(NULL, argc, argv, long_options, 0);
  93         poptReadDefaultConfig(pc, 0);
  94
  95         while ((opt = poptGetNextOpt(pc)) != -1) {
  96                 switch (opt) {
  97                 case OPT_HELP:
  98                         usage(stderr);
  99                         ret = CMD_SUCCESS;
 100                         goto end;
 101                 default:
 102                         usage(stderr);
 103                         ret = CMD_UNDEFINED;
 104                         goto end;
 105                 }
 106         }
 107
 108         opt_session_name = (char *) poptGetArg(pc);
 109         if (opt_session_name == NULL) {
 110                 ERR("Missing session name");
 111                 usage(stderr);
 112                 goto end;
 113         }
 114
 115         ret = set_session();
 116
 117 end:
 118         return ret;
 119 }