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Modify Session::save_history for portability

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git-svn-id: svn://localhost/ardour2/trunk@2432 d708f5d6-7413-0410-9779-e7cbd77b26cf
This commit is contained in:
Tim Mayberry 2007-09-09 10:04:58 +00:00
parent 99ecfb4096
commit bddb43a2bf
1 changed files with 38 additions and 36 deletions
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74
libs/ardour/session_state.cc
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@ -2657,48 +2657,50 @@ Session::instant_xml (const string& node_name)
int
Session::save_history (string snapshot_name)
{
XMLTree tree;
string xml_path;
string bak_path;
XMLTree tree;
tree.set_root (&_history.get_state (Config->get_saved_history_depth()));
tree.set_root (&_history.get_state (Config->get_saved_history_depth()));
if (snapshot_name.empty()) {
snapshot_name = _current_snapshot_name;
}
const string history_filename = snapshot_name + history_suffix;
const string backup_filename = history_filename + backup_suffix;
const sys::path xml_path = _session_dir->root_path() / history_filename;
const sys::path backup_path = _session_dir->root_path() / backup_filename;
if (snapshot_name.empty()) {
snapshot_name = _current_snapshot_name;
}
xml_path = _path + snapshot_name + ".history";
bak_path = xml_path + ".bak";
if ((access (xml_path.c_str(), F_OK) == 0) &&
(rename (xml_path.c_str(), bak_path.c_str())))
{
error << _("could not backup old history file, current history not saved.") << endmsg;
return -1;
}
if (!tree.write (xml_path))
{
error << string_compose (_("history could not be saved to %1"), xml_path) << endmsg;
/* don't leave a corrupt file lying around if it is
* possible to fix.
*/
if (unlink (xml_path.c_str())) {
error << string_compose (_("could not remove corrupt history file %1"), xml_path) << endmsg;
} else {
if (rename (bak_path.c_str(), xml_path.c_str()))
if (sys::exists (xml_path)) {
try
{
error << string_compose (_("could not restore history file from backup %1"), bak_path) << endmsg;
sys::rename (xml_path, backup_path);
}
}
catch (const sys::filesystem_error& err)
{
error << _("could not backup old history file, current history not saved") << endmsg;
return -1;
}
}
return -1;
}
if (!tree.write (xml_path.to_string()))
{
error << string_compose (_("history could not be saved to %1"), xml_path.to_string()) << endmsg;
return 0;
try
{
sys::remove (xml_path);
sys::rename (backup_path, xml_path);
}
catch (const sys::filesystem_error& err)
{
error << string_compose (_("could not restore history file from backup %1 (%2)"),
backup_path.to_string(), err.what()) << endmsg;
}
return -1;
}
return 0;
}
int