SValue For::Evaluate(const sptr<BShell>& parent, const sptr<ICommand>& shell, bool* outExit)
{
SVector<SValue> args;
for (size_t i = 0 ; i < m_words.CountItems(); i++)
{
bool insert_args = false;
//bout << "WORDS [" << i << "] " << m_words[i] << endl;
SValue expanded = Expand(shell, m_words.ItemAt(i), &insert_args);
if (insert_args)
{
collect_arguments(expanded.AsString(), &args);
}
else
{
//bout << "adding expanded " << expanded << endl;
args.AddItem(expanded);
}
}
*outExit = false;
SValue returned = SValue::Status(B_OK);
for (size_t i = 0 ; i < args.CountItems() && !*outExit; i++)
{
//bout << "setting m_condition to be " << args.ItemAt(i) << endl;
shell->SetProperty(SValue::String(m_condition), args.ItemAt(i));
returned = m_dolist->Evaluate(parent, shell, outExit);
}
return returned;
}
SValue SimpleCommand::Evaluate(const sptr<BShell>& parent, const sptr<ICommand>& shell, bool* outExit)
{
// bout << "SimpleCommand::Evaluate: " << m_command << endl;
sptr<ICommand> command = NULL;
bool doExit = false;
*outExit = false;
if (m_command != "" && m_command != "exit" && m_command != "return"
&& m_command != "cd" && m_command != "." && m_command != "source")
{
SValue cmdName = Expand(shell, m_command);
// If the command is actually an ICommand object,
// run it in-place.
// XXX This isn't quite right -- we really want
// to spawn a copy, in which we can set our own
// environment.
command = ICommand::AsInterface(cmdName);
// Not an object, try to execute by name.
if (command == NULL) {
command = shell->Spawn(cmdName.AsString());
}
if (command == NULL)
{
parent->TextError() << "bsh: " << m_command << ": command not found" << endl;
return SValue::Status(B_NAME_NOT_FOUND);
}
}
else
command = shell;
SValue result;
if (m_prefix != NULL)
result = m_prefix->Evaluate(parent, command, &doExit);
if (m_suffix != NULL)
m_suffix->Evaluate(parent, command, &doExit);
SVector<SString> words;
if (m_suffix != NULL)
words = m_suffix->GetWords();
// set redirects
// build argument list
ICommand::ArgList args;
args.AddItem(SValue::String(m_command));
for (size_t index = 0 ; index < words.CountItems(); index++)
{
bool expand = false;
//bout << "WORDS [" << index << "] " << words[index] << endl;
SValue expanded = Expand(shell, words.ItemAt(index), &expand);
//bout << "WORDS [" << index << "] expaned to " << expanded << endl;
if (expand)
{
collect_arguments(expanded.AsString(), &args);
}
else
{
args.AddItem(expanded);
}
}
// only run this if we are a newly spawned command!
if (command != shell)
{
result = command->Run(args);
// This command may be a function, that could call "exit".
*outExit = parent->ExitRequested();
}
else if (m_command == "exit" || m_command == "return")
{
result = args.CountItems() > 1 ? args[1] : SValue::Status(B_OK);
*outExit = true;
if (m_command == "exit") {
parent->RequestExit();
}
}
else if (m_command == "cd")
{
SString path;
if (args.CountItems() > 1) {
path = args[1].AsString();
}
if (path != "") {
SString cd=shell->GetProperty(SValue::String("PWD")).AsString();
cd.PathAppend(path, true);
SNode node(parent->Context().Root());
SValue dir(node.Walk(cd, (uint32_t)0));
if (interface_cast<INode>(dir) != NULL) {
shell->SetProperty(SValue::String("PWD"), SValue::String(cd));
result = SValue::Status(B_OK);
} else {
parent->TextError() << "cd: '" << path << "' is not a directory." << endl;
result = SValue::Status(B_BAD_VALUE);
}
} else {
parent->TextError() << "cd: no directory specified." << endl;
result = SValue::Status(B_BAD_VALUE);
}
}
else if (m_command == "." || m_command == "source")
{
if (args.CountItems() > 1) {
sptr<ITextInput> input;
SString path;
find_some_input(args[1], parent, &input, &path);
if (input != NULL) {
SValue oldFile = parent->GetProperty(kBSH_SCRIPT_FILE);
SValue oldDir = parent->GetProperty(kBSH_SCRIPT_DIR);
args.RemoveItemsAt(0, 2);
args.AddItemAt(SValue::String(path), 0);
parent->SetLastResult(SValue::String(path));
parent->SetProperty(kBSH_SCRIPT_FILE, SValue::String(path));
SString parentDir;
path.PathGetParent(&parentDir);
parent->SetProperty(kBSH_SCRIPT_DIR, SValue::String(parentDir));
FunctionCommand::ArgumentHandler argHandler;
argHandler.ApplyArgs(parent, args, true);
sptr<Lexer> lexer = new Lexer(parent, input, parent->TextOutput(), false);
SValue result;
if (lexer != NULL) {
Parser parser(parent);
SValue result = parser.Parse(lexer);
} else {
parent->TextError() << m_command << ": out of memory." << endl;
result = SValue::Status(B_NO_MEMORY);
}
argHandler.RestoreArgs(parent);
parent->SetProperty(kBSH_SCRIPT_FILE, oldFile);
parent->SetProperty(kBSH_SCRIPT_DIR, oldDir);
return result;
} else {
parent->TextError() << m_command << ": '" << args[1] << "' is not a file." << endl;
result = SValue::Status(B_BAD_VALUE);
}
} else {
parent->TextError() << m_command << ": no file specified." << endl;
result = SValue::Status(B_BAD_VALUE);
}
*outExit = parent->ExitRequested();
}
return result;
}
