src/lxc/tools/lxc_freeze.c

   1 /*
   2  * lxc: linux Container library
   3  *
   4  * (C) Copyright IBM Corp. 2007, 2008
   5  *
   6  * Authors:
   7  * Daniel Lezcano <daniel.lezcano at free.fr>
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  22  */
  23 #include <stdio.h>
  24 #include <unistd.h>
  25 #include <sys/types.h>
  26 #include <libgen.h>
  27 #include <string.h>
  28
  29 #include <lxc/lxccontainer.h>
  30
  31 #include "lxc.h"
  32 #include "log.h"
  33
  34 #include "arguments.h"
  35
  36 static const struct option my_longopts[] = {
  37         LXC_COMMON_OPTIONS
  38 };
  39
  40 static struct lxc_arguments my_args = {
  41         .progname = "lxc-freeze",
  42         .help     = "\
  43 --name=NAME\n\
  44 \n\
  45 lxc-freeze freezes a container with the identifier NAME\n\
  46 \n\
  47 Options :\n\
  48   -n, --name=NAME      NAME of the container\n\
  49   --rcfile=FILE        Load configuration file FILE\n",
  50         .options  = my_longopts,
  51         .parser   = NULL,
  52         .checker  = NULL,
  53 };
  54
  55 int main(int argc, char *argv[])
  56 {
  57         struct lxc_container *c;
  58         struct lxc_log log;
  59
  60         if (lxc_arguments_parse(&my_args, argc, argv))
  61                 exit(EXIT_FAILURE);
  62
  63         if (!my_args.log_file)
  64                 my_args.log_file = "none";
  65
  66         log.name = my_args.name;
  67         log.file = my_args.log_file;
  68         log.level = my_args.log_priority;
  69         log.prefix = my_args.progname;
  70         log.quiet = my_args.quiet;
  71         log.lxcpath = my_args.lxcpath[0];
  72
  73         if (lxc_log_init(&log))
  74                 exit(EXIT_FAILURE);
  75         lxc_log_options_no_override();
  76
  77         /* REMOVE IN LXC 3.0 */
  78         setenv("LXC_UPDATE_CONFIG_FORMAT", "1", 0);
  79
  80         c = lxc_container_new(my_args.name, my_args.lxcpath[0]);
  81         if (!c) {
  82                 fprintf(stderr, "No such container: %s:%s\n", my_args.lxcpath[0], my_args.name);
  83                 exit(EXIT_FAILURE);
  84         }
  85
  86         if (my_args.rcfile) {
  87                 c->clear_config(c);
  88                 if (!c->load_config(c, my_args.rcfile)) {
  89                         fprintf(stderr, "Failed to load rcfile\n");
  90                         lxc_container_put(c);
  91                         exit(EXIT_FAILURE);
  92                 }
  93                 c->configfile = strdup(my_args.rcfile);
  94                 if (!c->configfile) {
  95                         fprintf(stderr, "Out of memory setting new config filename\n");
  96                         lxc_container_put(c);
  97                         exit(EXIT_FAILURE);
  98                 }
  99         }
 100
 101         if (!c->may_control(c)) {
 102                 fprintf(stderr, "Insufficent privileges to control %s:%s\n", my_args.lxcpath[0], my_args.name);
 103                 lxc_container_put(c);
 104                 exit(EXIT_FAILURE);
 105         }
 106
 107         if (!c->freeze(c)) {
 108                 fprintf(stderr, "Failed to freeze %s:%s\n", my_args.lxcpath[0], my_args.name);
 109                 lxc_container_put(c);
 110                 exit(EXIT_FAILURE);
 111         }
 112
 113         lxc_container_put(c);
 114
 115         exit(EXIT_SUCCESS);
 116 }