external/gpl2/lvm2/dist/liblvm/lvm_base.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (C) 2008,2009 Red Hat, Inc. All rights reserved.
   5  *
   6  * This file is part of LVM2.
   7  *
   8  * This copyrighted material is made available to anyone wishing to use,
   9  * modify, copy, or redistribute it subject to the terms and conditions
  10  * of the GNU Lesser General Public License v.2.1.
  11  *
  12  * You should have received a copy of the GNU Lesser General Public License
  13  * along with this program; if not, write to the Free Software Foundation,
  14  * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  15  */
  16
  17 #include "lib.h"
  18 #include "lvm2app.h"
  19 #include "toolcontext.h"
  20 #include "locking.h"
  21 #include "lvm-version.h"
  22
  23 const char *lvm_library_get_version(void)
  24 {
  25         return LVM_VERSION;
  26 }
  27
  28 lvm_t lvm_init(const char *system_dir)
  29 {
  30         struct cmd_context *cmd;
  31
  32         /* FIXME: logging bound to handle
  33          */
  34
  35         /* create context */
  36         /* FIXME: split create_toolcontext */
  37         cmd = create_toolcontext(1, system_dir);
  38         if (!cmd)
  39                 return NULL;
  40
  41         if (stored_errno())
  42                 return (lvm_t) cmd;
  43
  44         /*
  45          * FIXME: if an non memory error occured, return the cmd (maybe some
  46          * cleanup needed).
  47          */
  48
  49         /* initialization from lvm_run_command */
  50         init_error_message_produced(0);
  51
  52         /* FIXME: locking_type config option needed? */
  53         /* initialize locking */
  54         if (!init_locking(-1, cmd)) {
  55                 /* FIXME: use EAGAIN as error code here */
  56                 log_error("Locking initialisation failed.");
  57                 lvm_quit((lvm_t) cmd);
  58                 return NULL;
  59         }
  60         /*
  61          * FIXME: Use cmd->cmd_line as audit trail for liblvm calls.  Used in
  62          * archive() call.  Possible example:
  63          * cmd_line = "lvm_vg_create: vg1\nlvm_vg_extend vg1 /dev/sda1\n"
  64          */
  65         cmd->cmd_line = (char *)"liblvm";
  66
  67         return (lvm_t) cmd;
  68 }
  69
  70 void lvm_quit(lvm_t libh)
  71 {
  72         destroy_toolcontext((struct cmd_context *)libh);
  73 }
  74
  75 int lvm_config_reload(lvm_t libh)
  76 {
  77         /* FIXME: re-init locking needed here? */
  78         if (!refresh_toolcontext((struct cmd_context *)libh))
  79                 return -1;
  80         return 0;
  81 }
  82
  83 /*
  84  * FIXME: submit a patch to document the --config option
  85  */
  86 int lvm_config_override(lvm_t libh, const char *config_settings)
  87 {
  88         struct cmd_context *cmd = (struct cmd_context *)libh;
  89         if (override_config_tree_from_string(cmd, config_settings))
  90                 return -1;
  91         return 0;
  92 }
  93
  94 int lvm_errno(lvm_t libh)
  95 {
  96         return stored_errno();
  97 }
  98
  99 const char *lvm_errmsg(lvm_t libh)
 100 {
 101         return stored_errmsg();
 102 }