ShellPkg: Do not mix status when executing a command

The function InternalShellExecuteDevicePath() did not differentiate an error occuring during the preparation of an image and an error occurring during its execution.

A use case of the issue was when a EFI application was called in a EFI Shell script. If the EFI application was returning an error then the NSH script stopped its execution. While the EFI Shell specification says the script should continue its execution (see 4.2 Error Handling).

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Olivier Martin <olivier.martin@arm.com>
Reviewed-by: Jaben Carsey <Jaben.Carsey@intel.com>


git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15523 6f19259b-4bc3-4df7-8a09-765794883524

ShellPkg/Application/Shell/Shell.c

@@ -2231,6 +2231,7 @@ RunCommandOrFile(
 )
 {
   EFI_STATUS                Status;
+  EFI_STATUS                StartStatus;
   CHAR16                    *CommandWithPath;
   EFI_DEVICE_PATH_PROTOCOL  *DevPath;
   SHELL_STATUS              CalleeExitStatus;
@@ -2308,6 +2309,7 @@ RunCommandOrFile(
             DevPath,
             CmdLine,
             NULL,
+            &StartStatus,
             NULL,
             NULL
            );
@@ -2317,7 +2319,7 @@ RunCommandOrFile(
           if(EFI_ERROR (Status)) {
             CalleeExitStatus = (SHELL_STATUS) (Status & (~MAX_BIT));
           } else {
-            CalleeExitStatus = SHELL_SUCCESS;
+            CalleeExitStatus = (SHELL_STATUS) StartStatus;
           }
 
           //

ShellPkg/Application/Shell/ShellProtocol.c

@@ -1386,11 +1386,13 @@ InternalShellExecuteDevicePath(
   IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath,
   IN CONST CHAR16                   *CommandLine OPTIONAL,
   IN CONST CHAR16                   **Environment OPTIONAL,
+  OUT EFI_STATUS                    *StartImageStatus OPTIONAL,
   OUT UINTN                         *ExitDataSize OPTIONAL,
   OUT CHAR16                        **ExitData OPTIONAL
   )
 {
   EFI_STATUS                    Status;
+  EFI_STATUS                    StartStatus;
   EFI_STATUS                    CleanupStatus;
   EFI_HANDLE                    NewHandle;
   EFI_LOADED_IMAGE_PROTOCOL     *LoadedImage;
@@ -1504,11 +1506,14 @@ InternalShellExecuteDevicePath(
     // now start the image, passing up exit data if the caller requested it
     //
     if (!EFI_ERROR(Status)) {
-      Status      = gBS->StartImage(
+      StartStatus      = gBS->StartImage(
                           NewHandle,
                           ExitDataSizePtr,
                           ExitData
                           );
+      if (StartImageStatus != NULL) {
+        *StartImageStatus = StartStatus;
+      }
 
       CleanupStatus = gBS->UninstallProtocolInterface(
                             NewHandle,
@@ -1620,6 +1625,7 @@ EfiShellExecute(
     DevPath,
     Temp,
     (CONST CHAR16**)Environment,
+    StatusCode,
     &ExitDataSize,
     &ExitData);
 
@@ -1644,8 +1650,6 @@ EfiShellExecute(
       }
       FreePool (ExitData);
       Status = EFI_SUCCESS;
-    } else if ((StatusCode != NULL) && !EFI_ERROR(Status)) {
-      *StatusCode = EFI_SUCCESS;
     }
 
   //

ShellPkg/Application/Shell/ShellProtocol.h

@@ -459,6 +459,7 @@ InternalShellExecuteDevicePath(
   IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath,
   IN CONST CHAR16                   *CommandLine OPTIONAL,
   IN CONST CHAR16                   **Environment OPTIONAL,
+  OUT EFI_STATUS                    *StartImageStatus OPTIONAL,
   OUT UINTN                         *ExitDataSize OPTIONAL,
   OUT CHAR16                        **ExitData OPTIONAL
   );