From c5c994c573f3d4044fa5dde01a81ae5ed479d8fe Mon Sep 17 00:00:00 2001 From: Chen A Chen Date: Tue, 6 Dec 2016 13:56:46 +0800 Subject: ShellPkg/Application: Fix ">v" cannot update environment variable When ">v" is used to redirect the command output to environment variable (e.g.: "echo xxx >v yyy"), we only called SetVariable() to update the variable storage but forgot to update the cached environment variables in gShellEnvVarList. When updating the variable storage, the existing code unnecessary saved the ending NULL character into variable storage. The patch fixes all the above issues. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Chen A Chen Reviewed-by: Ruiyu Ni Reviewed-by: Jaben Carsey Reviewed-by: Tapan Shah --- ShellPkg/Application/Shell/FileHandleWrappers.c | 170 ++++++++++++++++++------ ShellPkg/Application/Shell/ShellEnvVar.c | 12 +- ShellPkg/Application/Shell/ShellProtocol.c | 4 +- 3 files changed, 142 insertions(+), 44 deletions(-) (limited to 'ShellPkg/Application') diff --git a/ShellPkg/Application/Shell/FileHandleWrappers.c b/ShellPkg/Application/Shell/FileHandleWrappers.c index 18f4169c7d..3c11d82944 100644 --- a/ShellPkg/Application/Shell/FileHandleWrappers.c +++ b/ShellPkg/Application/Shell/FileHandleWrappers.c @@ -1040,6 +1040,7 @@ FileInterfaceEnvClose( UINTN NewSize; EFI_STATUS Status; BOOLEAN Volatile; + UINTN TotalSize; // // Most if not all UEFI commands will have an '\r\n' at the end of any output. @@ -1049,6 +1050,7 @@ FileInterfaceEnvClose( // NewBuffer = NULL; NewSize = 0; + TotalSize = 0; Status = IsVolatileEnv (((EFI_FILE_PROTOCOL_ENVIRONMENT*)This)->Name, &Volatile); if (EFI_ERROR (Status)) { @@ -1057,7 +1059,8 @@ FileInterfaceEnvClose( Status = SHELL_GET_ENVIRONMENT_VARIABLE(((EFI_FILE_PROTOCOL_ENVIRONMENT*)This)->Name, &NewSize, NewBuffer); if (Status == EFI_BUFFER_TOO_SMALL) { - NewBuffer = AllocateZeroPool(NewSize + sizeof(CHAR16)); + TotalSize = NewSize + sizeof (CHAR16); + NewBuffer = AllocateZeroPool (TotalSize); if (NewBuffer == NULL) { return EFI_OUT_OF_RESOURCES; } @@ -1066,17 +1069,43 @@ FileInterfaceEnvClose( if (!EFI_ERROR(Status) && NewBuffer != NULL) { - if (StrSize(NewBuffer) > 6) - { - if ((((CHAR16*)NewBuffer)[(StrSize(NewBuffer)/2) - 2] == CHAR_LINEFEED) - && (((CHAR16*)NewBuffer)[(StrSize(NewBuffer)/2) - 3] == CHAR_CARRIAGE_RETURN)) { - ((CHAR16*)NewBuffer)[(StrSize(NewBuffer)/2) - 3] = CHAR_NULL; + if (TotalSize / sizeof (CHAR16) >= 3) { + if ( (((CHAR16*)NewBuffer)[TotalSize / sizeof (CHAR16) - 2] == CHAR_LINEFEED) && + (((CHAR16*)NewBuffer)[TotalSize / sizeof (CHAR16) - 3] == CHAR_CARRIAGE_RETURN) + ) { + ((CHAR16*)NewBuffer)[TotalSize / sizeof (CHAR16) - 3] = CHAR_NULL; } if (Volatile) { - Status = SHELL_SET_ENVIRONMENT_VARIABLE_V(((EFI_FILE_PROTOCOL_ENVIRONMENT*)This)->Name, StrSize(NewBuffer), NewBuffer); + Status = SHELL_SET_ENVIRONMENT_VARIABLE_V ( + ((EFI_FILE_PROTOCOL_ENVIRONMENT*)This)->Name, + TotalSize - sizeof (CHAR16), + NewBuffer + ); + + if (!EFI_ERROR(Status)) { + Status = ShellAddEnvVarToList ( + ((EFI_FILE_PROTOCOL_ENVIRONMENT*)This)->Name, + NewBuffer, + TotalSize, + EFI_VARIABLE_BOOTSERVICE_ACCESS + ); + } } else { - Status = SHELL_SET_ENVIRONMENT_VARIABLE_NV(((EFI_FILE_PROTOCOL_ENVIRONMENT*)This)->Name, StrSize(NewBuffer), NewBuffer); + Status = SHELL_SET_ENVIRONMENT_VARIABLE_NV ( + ((EFI_FILE_PROTOCOL_ENVIRONMENT*)This)->Name, + TotalSize - sizeof (CHAR16), + NewBuffer + ); + + if (!EFI_ERROR(Status)) { + Status = ShellAddEnvVarToList ( + ((EFI_FILE_PROTOCOL_ENVIRONMENT*)This)->Name, + NewBuffer, + TotalSize, + EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS + ); + } } } } @@ -1128,12 +1157,14 @@ FileInterfaceEnvRead( /** File style interface for Volatile Environment Variable (Write). + This function also caches the environment variable into gShellEnvVarList. @param[in] This The pointer to the EFI_FILE_PROTOCOL object. @param[in, out] BufferSize Size in bytes of Buffer. @param[in] Buffer The pointer to the buffer to write. - @retval EFI_SUCCESS The data was read. + @retval EFI_SUCCESS The data was successfully write to variable. + @retval SHELL_OUT_OF_RESOURCES A memory allocation failed. **/ EFI_STATUS EFIAPI @@ -1146,41 +1177,71 @@ FileInterfaceEnvVolWrite( VOID* NewBuffer; UINTN NewSize; EFI_STATUS Status; + UINTN TotalSize; NewBuffer = NULL; NewSize = 0; + TotalSize = 0; Status = SHELL_GET_ENVIRONMENT_VARIABLE(((EFI_FILE_PROTOCOL_ENVIRONMENT*)This)->Name, &NewSize, NewBuffer); - if (Status == EFI_BUFFER_TOO_SMALL){ - NewBuffer = AllocateZeroPool(NewSize + *BufferSize + sizeof(CHAR16)); + if (Status == EFI_BUFFER_TOO_SMALL) { + TotalSize = NewSize + *BufferSize + sizeof (CHAR16); + } else if (Status == EFI_NOT_FOUND) { + TotalSize = *BufferSize + sizeof(CHAR16); + } else { + return Status; + } + + NewBuffer = AllocateZeroPool (TotalSize); + if (NewBuffer == NULL) { + return EFI_OUT_OF_RESOURCES; + } + + if (Status == EFI_BUFFER_TOO_SMALL) { Status = SHELL_GET_ENVIRONMENT_VARIABLE(((EFI_FILE_PROTOCOL_ENVIRONMENT*)This)->Name, &NewSize, NewBuffer); } - if (!EFI_ERROR(Status) && NewBuffer != NULL) { - while (((CHAR16*)NewBuffer)[NewSize/2] == CHAR_NULL) { - // - // We want to overwrite the CHAR_NULL - // - NewSize -= 2; - } - CopyMem((UINT8*)NewBuffer + NewSize + 2, Buffer, *BufferSize); - Status = SHELL_SET_ENVIRONMENT_VARIABLE_V(((EFI_FILE_PROTOCOL_ENVIRONMENT*)This)->Name, StrSize(NewBuffer), NewBuffer); - FreePool(NewBuffer); - return (Status); - } else { - SHELL_FREE_NON_NULL(NewBuffer); - return (SHELL_SET_ENVIRONMENT_VARIABLE_V(((EFI_FILE_PROTOCOL_ENVIRONMENT*)This)->Name, *BufferSize, Buffer)); + + if (EFI_ERROR (Status) && Status != EFI_NOT_FOUND) { + FreePool (NewBuffer); + return Status; + } + + CopyMem ((UINT8*)NewBuffer + NewSize, Buffer, *BufferSize); + Status = ShellAddEnvVarToList ( + ((EFI_FILE_PROTOCOL_ENVIRONMENT*)This)->Name, + NewBuffer, + TotalSize, + EFI_VARIABLE_BOOTSERVICE_ACCESS + ); + if (EFI_ERROR(Status)) { + FreePool (NewBuffer); + return Status; + } + + Status = SHELL_SET_ENVIRONMENT_VARIABLE_V ( + ((EFI_FILE_PROTOCOL_ENVIRONMENT*)This)->Name, + TotalSize - sizeof (CHAR16), + NewBuffer + ); + if (EFI_ERROR(Status)) { + ShellRemvoeEnvVarFromList (((EFI_FILE_PROTOCOL_ENVIRONMENT*)This)->Name); } + + FreePool (NewBuffer); + return Status; } /** File style interface for Non Volatile Environment Variable (Write). + This function also caches the environment variable into gShellEnvVarList. @param[in] This The pointer to the EFI_FILE_PROTOCOL object. @param[in, out] BufferSize Size in bytes of Buffer. @param[in] Buffer The pointer to the buffer to write. - @retval EFI_SUCCESS The data was read. + @retval EFI_SUCCESS The data was successfully write to variable. + @retval SHELL_OUT_OF_RESOURCES A memory allocation failed. **/ EFI_STATUS EFIAPI @@ -1193,27 +1254,58 @@ FileInterfaceEnvNonVolWrite( VOID* NewBuffer; UINTN NewSize; EFI_STATUS Status; + UINTN TotalSize; NewBuffer = NULL; NewSize = 0; + TotalSize = 0; Status = SHELL_GET_ENVIRONMENT_VARIABLE(((EFI_FILE_PROTOCOL_ENVIRONMENT*)This)->Name, &NewSize, NewBuffer); - if (Status == EFI_BUFFER_TOO_SMALL){ - NewBuffer = AllocateZeroPool(NewSize + *BufferSize); + if (Status == EFI_BUFFER_TOO_SMALL) { + TotalSize = NewSize + *BufferSize + sizeof (CHAR16); + } else if (Status == EFI_NOT_FOUND) { + TotalSize = *BufferSize + sizeof (CHAR16); + } else { + return Status; + } + + NewBuffer = AllocateZeroPool (TotalSize); + if (NewBuffer == NULL) { + return EFI_OUT_OF_RESOURCES; + } + + if (Status == EFI_BUFFER_TOO_SMALL) { Status = SHELL_GET_ENVIRONMENT_VARIABLE(((EFI_FILE_PROTOCOL_ENVIRONMENT*)This)->Name, &NewSize, NewBuffer); } - if (!EFI_ERROR(Status)) { - CopyMem((UINT8*)NewBuffer + NewSize, Buffer, *BufferSize); - return (SHELL_SET_ENVIRONMENT_VARIABLE_NV( - ((EFI_FILE_PROTOCOL_ENVIRONMENT*)This)->Name, - NewSize + *BufferSize, - NewBuffer)); - } else { - return (SHELL_SET_ENVIRONMENT_VARIABLE_NV( - ((EFI_FILE_PROTOCOL_ENVIRONMENT*)This)->Name, - *BufferSize, - Buffer)); + + if (EFI_ERROR(Status) && Status != EFI_NOT_FOUND) { + FreePool (NewBuffer); + return Status; + } + + CopyMem ((UINT8*) NewBuffer + NewSize, Buffer, *BufferSize); + Status = ShellAddEnvVarToList ( + ((EFI_FILE_PROTOCOL_ENVIRONMENT*)This)->Name, + NewBuffer, + TotalSize, + EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS + ); + if (EFI_ERROR (Status)) { + FreePool (NewBuffer); + return Status; } + + Status = SHELL_SET_ENVIRONMENT_VARIABLE_NV ( + ((EFI_FILE_PROTOCOL_ENVIRONMENT*)This)->Name, + TotalSize - sizeof (CHAR16), + NewBuffer + ); + if (EFI_ERROR (Status)) { + ShellRemvoeEnvVarFromList (((EFI_FILE_PROTOCOL_ENVIRONMENT*)This)->Name); + } + + FreePool (NewBuffer); + return Status; } /** diff --git a/ShellPkg/Application/Shell/ShellEnvVar.c b/ShellPkg/Application/Shell/ShellEnvVar.c index 6d8c79b4ca..4c49c1ca98 100644 --- a/ShellPkg/Application/Shell/ShellEnvVar.c +++ b/ShellPkg/Application/Shell/ShellEnvVar.c @@ -178,7 +178,10 @@ GetEnvironmentVariableList( Status = EFI_OUT_OF_RESOURCES; } else { ValSize = ValBufferSize; - VarList->Val = AllocateZeroPool(ValSize); + // + // We need another CHAR16 to save '\0' in VarList->Val. + // + VarList->Val = AllocateZeroPool (ValSize + sizeof (CHAR16)); if (VarList->Val == NULL) { SHELL_FREE_NON_NULL(VarList); Status = EFI_OUT_OF_RESOURCES; @@ -188,7 +191,10 @@ GetEnvironmentVariableList( if (Status == EFI_BUFFER_TOO_SMALL){ ValBufferSize = ValSize > ValBufferSize * 2 ? ValSize : ValBufferSize * 2; SHELL_FREE_NON_NULL (VarList->Val); - VarList->Val = AllocateZeroPool(ValBufferSize); + // + // We need another CHAR16 to save '\0' in VarList->Val. + // + VarList->Val = AllocateZeroPool (ValBufferSize + sizeof (CHAR16)); if (VarList->Val == NULL) { SHELL_FREE_NON_NULL(VarList); Status = EFI_OUT_OF_RESOURCES; @@ -272,7 +278,7 @@ SetEnvironmentVariableList( ; !IsNull(ListHead, &Node->Link) ; Node = (ENV_VAR_LIST*)GetNextNode(ListHead, &Node->Link) ){ - Size = StrSize(Node->Val); + Size = StrSize (Node->Val) - sizeof (CHAR16); if (Node->Atts & EFI_VARIABLE_NON_VOLATILE) { Status = SHELL_SET_ENVIRONMENT_VARIABLE_NV(Node->Key, Size, Node->Val); } else { diff --git a/ShellPkg/Application/Shell/ShellProtocol.c b/ShellPkg/Application/Shell/ShellProtocol.c index 04b66c5aca..12c7c40524 100644 --- a/ShellPkg/Application/Shell/ShellProtocol.c +++ b/ShellPkg/Application/Shell/ShellProtocol.c @@ -2872,8 +2872,8 @@ InternalEfiShellSetEnv( ); if (!EFI_ERROR (Status)) { Status = Volatile - ? SHELL_SET_ENVIRONMENT_VARIABLE_V(Name, StrSize(Value), Value) - : SHELL_SET_ENVIRONMENT_VARIABLE_NV(Name, StrSize(Value), Value); + ? SHELL_SET_ENVIRONMENT_VARIABLE_V (Name, StrSize (Value) - sizeof (CHAR16), Value) + : SHELL_SET_ENVIRONMENT_VARIABLE_NV (Name, StrSize (Value) - sizeof (CHAR16), Value); if (EFI_ERROR (Status)) { ShellRemvoeEnvVarFromList(Name); } -- cgit v1.2.3