Function IsValidSplit

ShellPkg/Application/Shell/Shell.c:2058–2106

Determine if the first item in a command line is valid. @param[in] CmdLine The command line to parse. @retval EFI_SUCCESS The item is valid. @retval EFI_OUT_OF_RESOURCES A memory allocation failed. @retval EFI_NOT_FOUND The operation type is unknown or invalid. **/

  @retval EFI_NOT_FOUND         The operation type is unknown or invalid.
**/
EFI_STATUS
IsValidSplit(
  IN CONST CHAR16 *CmdLine
  )
{
  CHAR16        *Temp;
  CHAR16        *FirstParameter;
  CHAR16        *TempWalker;
  EFI_STATUS    Status;

  Temp           = NULL;

  Temp = StrnCatGrow(&Temp, NULL, CmdLine, 0);
  if (Temp == NULL) {
    return (EFI_OUT_OF_RESOURCES);
  }

  FirstParameter = StrStr(Temp, L"|");
  if (FirstParameter != NULL) {
    *FirstParameter = CHAR_NULL;
  }

  FirstParameter = NULL;

  //
  // Process the command line
  //
  Status = ProcessCommandLineToFinal(&Temp);

  if (!EFI_ERROR(Status)) {
    FirstParameter = AllocateZeroPool(StrSize(CmdLine));
    if (FirstParameter == NULL) {
      SHELL_FREE_NON_NULL(Temp);
      return (EFI_OUT_OF_RESOURCES);
    }
    TempWalker = (CHAR16*)Temp;
    if (!EFI_ERROR(GetNextParameter(&TempWalker, &FirstParameter, StrSize(CmdLine), TRUE))) {
    if (GetOperationType(FirstParameter) == Unknown_Invalid) {
      ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_SHELL_NOT_FOUND), ShellInfoObject.HiiHandle, FirstParameter);
      SetLastError(SHELL_NOT_FOUND);
      Status = EFI_NOT_FOUND;
    }
  }
  }

  SHELL_FREE_NON_NULL(Temp);
  SHELL_FREE_NON_NULL(FirstParameter);
  return Status;
}

/**
  Determine if a command line contains with a split contains only valid commands.