src/lxc/lxc_config.c

   1 /* lxc_config
   2  *
   3  * Copyright © 2012 Serge Hallyn <serge.hallyn@ubuntu.com>.
   4  * Copyright © 2012 Canonical Ltd.
   5  *
   6  *  This library is free software; you can redistribute it and/or
   7  *  modify it under the terms of the GNU Lesser General Public
   8  *  License as published by the Free Software Foundation; either
   9  *  version 2.1 of the License, or (at your option) any later version.
  10
  11  *  This library is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  *  Lesser General Public License for more details.
  15
  16  *  You should have received a copy of the GNU Lesser General Public
  17  *  License along with this library; if not, write to the Free Software
  18  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  19  */
  20
  21 #include <stdio.h>
  22 #include <string.h>
  23
  24 #include <lxc/lxccontainer.h>
  25
  26 #include "config.h"
  27
  28 struct lxc_config_items {
  29         char *name;
  30 };
  31
  32 static struct lxc_config_items items[] =
  33 {
  34         { .name = "lxc.default_config", },
  35         { .name = "lxc.lxcpath", },
  36         { .name = "lxc.bdev.lvm.vg", },
  37         { .name = "lxc.bdev.lvm.thin_pool", },
  38         { .name = "lxc.bdev.zfs.root", },
  39         { .name = "lxc.cgroup.use", },
  40         { .name = "lxc.cgroup.pattern", },
  41         { .name = NULL, },
  42 };
  43
  44 static void usage(char *me)
  45 {
  46         printf("Usage: %s -l: list all available configuration items\n", me);
  47         printf("       %s item: print configuration item\n", me);
  48         exit(1);
  49 }
  50
  51 static void list_config_items(void)
  52 {
  53         struct lxc_config_items *i;
  54
  55         for (i = &items[0]; i->name; i++)
  56                 printf("%s\n", i->name);
  57         exit(0);
  58 }
  59
  60 int main(int argc, char *argv[])
  61 {
  62         struct lxc_config_items *i;
  63         const char *value;
  64
  65         if (argc < 2)
  66                 usage(argv[0]);
  67         if (strcmp(argv[1], "-l") == 0)
  68                 list_config_items();
  69         for (i = &items[0]; i->name; i++) {
  70                 if (strcmp(argv[1], i->name) == 0) {
  71                         value = lxc_get_global_config_item(i->name);
  72                         if (value)
  73                                 printf("%s\n", value);
  74                         else
  75                                 printf("%s is not set.\n", argv[1]);
  76                         exit(0);
  77                 }
  78         }
  79         printf("Unknown configuration item: %s\n", argv[1]);
  80         exit(1);
  81 }