contrib/lvm2/dist/tools/vgcfgbackup.c

   1 /*      $NetBSD: vgcfgbackup.c,v 1.1.1.2 2009/12/02 00:25:56 haad Exp $ */
   2
   3 /*
   4  * Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
   5  * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
   6  *
   7  * This file is part of LVM2.
   8  *
   9  * This copyrighted material is made available to anyone wishing to use,
  10  * modify, copy, or redistribute it subject to the terms and conditions
  11  * of the GNU Lesser General Public License v.2.1.
  12  *
  13  * You should have received a copy of the GNU Lesser General Public License
  14  * along with this program; if not, write to the Free Software Foundation,
  15  * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  16  */
  17
  18 #include "tools.h"
  19
  20 static char *_expand_filename(const char *template, const char *vg_name,
  21                               char **last_filename)
  22 {
  23         char *filename;
  24
  25         if (security_level())
  26                 return dm_strdup(template);
  27
  28         if (!(filename = dm_malloc(PATH_MAX))) {
  29                 log_error("Failed to allocate filename.");
  30                 return NULL;
  31         }
  32
  33         if (snprintf(filename, PATH_MAX, template, vg_name) < 0) {
  34                 log_error("Error processing filename template %s",
  35                            template);
  36                 dm_free(filename);
  37                 return NULL;
  38         }
  39         if (*last_filename && !strncmp(*last_filename, filename, PATH_MAX)) {
  40                 log_error("VGs must be backed up into different files. "
  41                           "Use %%s in filename for VG name.");
  42                 dm_free(filename);
  43                 return NULL;
  44         }
  45
  46         dm_free(*last_filename);
  47         *last_filename = filename;
  48
  49         return filename;
  50 }
  51
  52 static int vg_backup_single(struct cmd_context *cmd, const char *vg_name,
  53                             struct volume_group *vg,
  54                             void *handle)
  55 {
  56         char **last_filename = (char **)handle;
  57         char *filename;
  58
  59         if (arg_count(cmd, file_ARG)) {
  60                 if (!(filename = _expand_filename(arg_value(cmd, file_ARG),
  61                                                   vg->name, last_filename))) {
  62                         stack;
  63                         return ECMD_FAILED;
  64                 }
  65
  66                 if (!backup_to_file(filename, vg->cmd->cmd_line, vg)) {
  67                         stack;
  68                         return ECMD_FAILED;
  69                 }
  70         } else {
  71                 if (vg_read_error(vg) == FAILED_INCONSISTENT) {
  72                         log_error("No backup taken: specify filename with -f "
  73                                   "to backup an inconsistent VG");
  74                         stack;
  75                         return ECMD_FAILED;
  76                 }
  77
  78                 /* just use the normal backup code */
  79                 backup_enable(cmd, 1);  /* force a backup */
  80                 if (!backup(vg)) {
  81                         stack;
  82                         return ECMD_FAILED;
  83                 }
  84         }
  85
  86         log_print("Volume group \"%s\" successfully backed up.", vg_name);
  87         return ECMD_PROCESSED;
  88 }
  89
  90 int vgcfgbackup(struct cmd_context *cmd, int argc, char **argv)
  91 {
  92         int ret;
  93         char *last_filename = NULL;
  94
  95         init_pvmove(1);
  96
  97         ret = process_each_vg(cmd, argc, argv, READ_ALLOW_INCONSISTENT,
  98                               &last_filename, &vg_backup_single);
  99
 100         dm_free(last_filename);
 101
 102         init_pvmove(0);
 103
 104         return ret;
 105 }