src/lxc/destroy.c

   1 /*
   2  * lxc: linux Container library
   3  *
   4  * (C) Copyright IBM Corp. 2007, 2008
   5  *
   6  * Authors:
   7  * Daniel Lezcano <dlezcano at fr.ibm.com>
   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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  22  */
  23
  24 #include <stdio.h>
  25 #include <string.h>
  26 #include <stdlib.h>
  27 #include <dirent.h>
  28 #include <unistd.h>
  29 #include <errno.h>
  30 #include <sys/param.h>
  31
  32 #include "error.h"
  33 #include <lxc/lxc.h>
  34 #include <lxc/log.h>
  35
  36 #include "config.h"
  37
  38 lxc_log_define(lxc_destroy, lxc);
  39
  40 static int remove_lxc_directory(const char *dirname)
  41 {
  42         char path[MAXPATHLEN];
  43
  44         snprintf(path, MAXPATHLEN, LXCPATH "/%s", dirname);
  45
  46         if (rmdir(path)) {
  47                 SYSERROR("failed to remove %s directory", path);
  48                 return -1;
  49         }
  50
  51         return 0;
  52 }
  53
  54 static int remove_config_file(const char *name)
  55 {
  56         char path[MAXPATHLEN];
  57
  58         snprintf(path, MAXPATHLEN, LXCPATH "/%s/config", name);
  59
  60         /* config file does not exists */
  61         if (access(path, F_OK))
  62                 return 0;
  63
  64         if (unlink(path)) {
  65                 ERROR("failed to unlink '%s'", path);
  66                 return -1;
  67         }
  68
  69         return 0;
  70 }
  71
  72 int lxc_destroy(const char *name)
  73 {
  74         int lock, ret = -1;
  75         char path[MAXPATHLEN];
  76
  77         lock = lxc_get_lock(name);
  78         if (lock < 0)
  79                 return ret;
  80
  81         if (remove_config_file(name))
  82                 WARN("failed to remove the configuration file");
  83
  84         if (lxc_rmstate(name)) {
  85                 ERROR("failed to remove state file for %s", name);
  86                 goto out_lock;
  87         }
  88
  89 #warning keep access to LXCPATH/<name> to destroy old created container
  90         snprintf(path, MAXPATHLEN, LXCPATH "/%s/init", name);
  91         unlink(path);
  92
  93         snprintf(path, MAXPATHLEN, LXCPATH "/%s/nsgroup", name);
  94         unlink(path);
  95
  96         if (lxc_unconfigure(name)) {
  97                 ERROR("failed to cleanup %s", name);
  98                 goto out_lock;
  99         }
 100
 101         if (remove_lxc_directory(name)) {
 102                 SYSERROR("failed to remove '%s'", name);
 103                 goto out_lock;
 104         }
 105
 106         ret = 0;
 107
 108 out_lock:
 109         lxc_put_lock(lock);
 110         return ret;
 111 }