reg: Support recursion when querying a registry value
Hugh McMaster
hugh.mcmaster at outlook.com
Tue Apr 26 07:28:24 CDT 2016
Signed-off-by: Hugh McMaster <hugh.mcmaster at outlook.com>
---
programs/reg/reg.c | 57 +++++++++++++++++++++++++++++++++++++++---------------
1 file changed, 41 insertions(+), 16 deletions(-)
diff --git a/programs/reg/reg.c b/programs/reg/reg.c
index 26a1288..c9903ac 100644
--- a/programs/reg/reg.c
+++ b/programs/reg/reg.c
@@ -655,16 +655,19 @@ static WCHAR *build_subkey_path(WCHAR *path, DWORD path_len, WCHAR *subkey_name,
return subkey_path;
}
-static int query_value(HKEY key, WCHAR *value_name, WCHAR *path)
+static int query_value(HKEY key, WCHAR *value_name, WCHAR *path, BOOL recurse)
{
LONG rc;
+ DWORD num_subkeys, max_subkey_len, subkey_len;
DWORD max_data_bytes, data_size;
- DWORD type;
+ DWORD type, path_len, i;
BYTE *data;
WCHAR fmt[] = {'%','1','\n',0};
WCHAR newlineW[] = {'\n',0};
+ WCHAR *subkey_name, *subkey_path;
+ HKEY subkey;
- rc = RegQueryInfoKeyW(key, NULL, NULL, NULL, NULL, NULL,
+ rc = RegQueryInfoKeyW(key, NULL, NULL, NULL, &num_subkeys, &max_subkey_len,
NULL, NULL, NULL, &max_data_bytes, NULL, NULL);
if (rc)
{
@@ -690,11 +693,43 @@ static int query_value(HKEY key, WCHAR *value_name, WCHAR *path)
HeapFree(GetProcessHeap(), 0, data);
- if (rc == ERROR_FILE_NOT_FOUND)
+ if (!recurse)
{
- output_message(STRING_CANNOT_FIND);
+ if (rc == ERROR_FILE_NOT_FOUND)
+ {
+ output_message(STRING_CANNOT_FIND);
+ return 1;
+ }
+ return 0;
+ }
+
+ max_subkey_len++;
+ subkey_name = HeapAlloc(GetProcessHeap(), 0, max_subkey_len * sizeof(WCHAR));
+ if (!subkey_name)
+ {
+ ERR("Failed to allocate memory for subkey_name\n");
return 1;
}
+
+ path_len = strlenW(path);
+
+ for (i = 0; i < num_subkeys; i++)
+ {
+ subkey_len = max_subkey_len;
+ rc = RegEnumKeyExW(key, i, subkey_name, &subkey_len, NULL, NULL, NULL, NULL);
+ if (rc == ERROR_SUCCESS)
+ {
+ subkey_path = build_subkey_path(path, path_len, subkey_name, subkey_len);
+ if (!RegOpenKeyExW(key, subkey_name, 0, KEY_READ, &subkey))
+ {
+ query_value(subkey, value_name, subkey_path, recurse);
+ RegCloseKey(subkey);
+ }
+ HeapFree(GetProcessHeap(), 0, subkey_path);
+ }
+ }
+
+ HeapFree(GetProcessHeap(), 0, subkey_name);
return 0;
}
@@ -795,8 +830,6 @@ static int reg_query(WCHAR *key_name, WCHAR *value_name, BOOL value_empty, BOOL
{
WCHAR *p;
HKEY root, key;
- static const WCHAR stubW[] = {'S','T','U','B',' ','Q','U','E','R','Y',' ',
- '-',' ','%','1',' ','%','2',' ','%','3','!','d','!',' ','%','4','!','d','!','\n',0};
int ret;
if (!sane_path(key_name))
@@ -825,15 +858,7 @@ static int reg_query(WCHAR *key_name, WCHAR *value_name, BOOL value_empty, BOOL
}
if (value_name || value_empty)
- {
- if (recurse)
- {
- RegCloseKey(key);
- output_string(stubW, key_name, value_name, value_empty, recurse);
- return 1;
- }
- ret = query_value(key, value_name, key_name);
- }
+ ret = query_value(key, value_name, key_name, recurse);
else
ret = query_all(key, key_name, recurse);
--
1.9.1
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