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[SYSSETUP] If creating the default-user hive file fails because the file already exists, make a backup (i.e. rename it) and retry its creation.

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This situation happens when one "updates" ReactOS by re-installing it on top of an existing installation.
This commit is contained in:
Hermès Bélusca-Maïto 2018-06-04 01:36:19 +02:00
parent b2606fd07a
commit c441de2232
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1 changed files with 27 additions and 0 deletions
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27
dll/win32/syssetup/install.c
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@ -1200,10 +1200,37 @@ SaveDefaultUserHive(VOID)
pSetupEnablePrivilege(L"SeBackupPrivilege", TRUE);
/* Save the Default hive */
dwError = RegSaveKeyExW(hUserKey,
szDefaultUserHive,
NULL,
REG_STANDARD_FORMAT);
if (dwError == ERROR_ALREADY_EXISTS)
{
WCHAR szBackupHive[MAX_PATH];
/* Build the backup hive file name by replacing the extension */
wcscpy(szBackupHive, szDefaultUserHive);
wcscpy(&szBackupHive[wcslen(szBackupHive) - 4], L".bak");
/* Back up the existing default user hive by renaming it, replacing any possible existing old backup */
if (!MoveFileExW(szDefaultUserHive,
szBackupHive,
MOVEFILE_REPLACE_EXISTING))
{
dwError = GetLastError();
DPRINT1("Failed to create a default-user hive backup '%S', MoveFileExW failed (Error %lu)\n",
szBackupHive, dwError);
}
else
{
/* The backup has been done, retry saving the Default hive */
dwError = RegSaveKeyExW(hUserKey,
szDefaultUserHive,
NULL,
REG_STANDARD_FORMAT);
}
}
if (dwError != ERROR_SUCCESS)
{
DPRINT1("RegSaveKeyExW() failed (Error %lu)\n", dwError);