Method ActionExec

source/script.cpp:13719–14046

ResultType Script::ActionExec(LPTSTR aAction, LPTSTR aParams, LPTSTR aWorkingDir, bool aDisplayErrors
	, LPTSTR aRunShowMode, HANDLE *aProcess, bool aUpdateLastError, bool aUseRunAs, Var *aOutputVar)
// Caller should specify NULL for aParams if it wants us to attempt to parse out params from
// within aAction.  Caller may specify empty string ("") instead to specify no params at all.
// Remember that aAction and aParams can both be NULL, so don't dereference without checking first.
// Note: For the Run & RunWait commands, aParams should always be NULL.  Params are parsed out of
// the aActionString at runtime, here, rather than at load-time because Run & RunWait might contain
// dereferenced variable(s), which can only be resolved at runtime.
{
	HANDLE hprocess_local;
	HANDLE &hprocess = aProcess ? *aProcess : hprocess_local; // To simplify other things.
	hprocess = NULL; // Init output param if the caller gave us memory to store it.  Even if caller didn't, other things below may rely on this being initialized.
	if (aOutputVar) // Same
		aOutputVar->Assign();

	// Launching nothing is always a success:
	if (!aAction || !*aAction) return OK;

	// Make sure this is set to NULL because CreateProcess() won't work if it's the empty string:
	if (aWorkingDir && !*aWorkingDir)
		aWorkingDir = NULL;

	#define IS_VERB(str) (   !_tcsicmp(str, _T("find")) || !_tcsicmp(str, _T("explore")) || !_tcsicmp(str, _T("open"))\
		|| !_tcsicmp(str, _T("edit")) || !_tcsicmp(str, _T("print")) || !_tcsicmp(str, _T("properties"))   )

	// Set default items to be run by ShellExecute().  These are also used by the error
	// reporting at the end, which is why they're initialized even if CreateProcess() works
	// and there's no need to use ShellExecute():
	LPTSTR shell_verb = NULL;
	LPTSTR shell_action = aAction;
	LPTSTR shell_params = NULL;
	
	///////////////////////////////////////////////////////////////////////////////////
	// This next section is done prior to CreateProcess() because when aParams is NULL,
	// we need to find out whether aAction contains a system verb.
	///////////////////////////////////////////////////////////////////////////////////
	if (aParams) // Caller specified the params (even an empty string counts, for this purpose).
	{
		if (IS_VERB(shell_action))
		{
			shell_verb = shell_action;
			shell_action = aParams;
		}
		else
			shell_params = aParams;
	}
	else // Caller wants us to try to parse params out of aAction.
	{
		// Find out the "first phrase" in the string to support the special "find" and "explore" operations.
		LPTSTR phrase;
		size_t phrase_len;
		// Set phrase_end to be the location of the first whitespace char, if one exists:
		LPTSTR phrase_end = StrChrAny(shell_action, _T(" \t")); // Find space or tab.
		if (phrase_end) // i.e. there is a second phrase.
		{
			phrase_len = phrase_end - shell_action;
			// Create a null-terminated copy of the phrase for comparison.
			phrase = tmemcpy(talloca(phrase_len + 1), shell_action, phrase_len);