[PATCH 0/1] MR6764: kernelbase: Add undocumented EXTENDED_FLAGS to process attribute list.

[eric pouech (＠epo)]

Let the sub-process be created, without implementing any additional
behavior from these flags.

Native cmd.exe uses this flag when spawning itself again for handling
builtin commands inside a pipe.

Signed-off-by: Eric Pouech

[PATCH 1/1] kernelbase: Add undocumented EXTENDED_FLAGS to process attribute list.

[Eric Pouech]

From: Eric Pouech

Let the sub-process be created, without implementing any additional
behavior from these flags.

Native cmd.exe uses this flag when spawning itself again for handling
builtin commands inside a pipe.

Signed-off-by: Eric Pouech 
---
 dlls/kernelbase/process.c | 6 ++++++
 include/winbase.h         | 3 +++
 2 files changed, 9 insertions(+)

diff --git a/dlls/kernelbase/process.c b/dlls/kernelbase/process.c
index 2d08481cd35..6ef21441aaf 100644
--- a/dlls/kernelbase/process.c
+++ b/dlls/kernelbase/process.c
@@ -595,6 +595,9 @@ BOOL WINAPI DECLSPEC_HOTPATCH CreateProcessInternalW( HANDLE token, const WCHAR
                             goto done;
                         }
                         break;
+                    case PROC_THREAD_ATTRIBUTE_EXTENDED_FLAGS:
+                        FIXME("PROC_THREAD_ATTRIBUTE_EXTENDED_FLAGS %lx.\n", *(ULONG *)attrs->attrs[i].value);
+                        break;
                     case PROC_THREAD_ATTRIBUTE_HANDLE_LIST:
                         handle_list = &attrs->attrs[i];
                         TRACE("PROC_THREAD_ATTRIBUTE_HANDLE_LIST handle count %Iu.\n", attrs->attrs[i].size / sizeof(HANDLE));
@@ -1766,6 +1769,9 @@ static inline DWORD validate_proc_thread_attribute( DWORD_PTR attr, SIZE_T size
     case PROC_THREAD_ATTRIBUTE_PARENT_PROCESS:
         if (size != sizeof(HANDLE)) return ERROR_BAD_LENGTH;
         break;
+    case PROC_THREAD_ATTRIBUTE_EXTENDED_FLAGS:
+        if (size != sizeof(ULONG)) return ERROR_BAD_LENGTH;
+        break;
     case PROC_THREAD_ATTRIBUTE_HANDLE_LIST:
         if ((size / sizeof(HANDLE)) * sizeof(HANDLE) != size) return ERROR_BAD_LENGTH;
         break;
diff --git a/include/winbase.h b/include/winbase.h
index c775ab71694..1eb6d5d9a6a 100644
--- a/include/winbase.h
+++ b/include/winbase.h
@@ -1680,6 +1680,7 @@ typedef struct _PROC_THREAD_ATTRIBUTE_LIST
 typedef enum _PROC_THREAD_ATTRIBUTE_NUM
 {
     ProcThreadAttributeParentProcess = 0,
+    ProcThreadAttributeExtendedFlags = 1,
     ProcThreadAttributeHandleList = 2,
     ProcThreadAttributeGroupAffinity = 3,
     ProcThreadAttributePreferredNode = 4,
@@ -1703,6 +1704,8 @@ typedef enum _PROC_THREAD_ATTRIBUTE_NUM
 } PROC_THREAD_ATTRIBUTE_NUM;

#define PROC_THREAD_ATTRIBUTE_PARENT_PROCESS (ProcThreadAttributeParentProcess | PROC_THREAD_ATTRIBUTE_INPUT)
+/* undocumented */
+#define PROC_THREAD_ATTRIBUTE_EXTENDED_FLAGS (ProcThreadAttributeExtendedFlags | PROC_THREAD_ATTRIBUTE_INPUT | PROC_THREAD_ATTRIBUTE_ADDITIVE)
 #define PROC_THREAD_ATTRIBUTE_HANDLE_LIST (ProcThreadAttributeHandleList | PROC_THREAD_ATTRIBUTE_INPUT)
 #define PROC_THREAD_ATTRIBUTE_GROUP_AFFINITY (ProcThreadAttributeGroupAffinity | PROC_THREAD_ATTRIBUTE_THREAD | PROC_THREAD_ATTRIBUTE_INPUT)
 #define PROC_THREAD_ATTRIBUTE_PREFERRED_NODE (ProcThreadAttributePreferredNode | PROC_THREAD_ATTRIBUTE_INPUT)