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Shell: Correct FdRedirection inheriting from two RefCounted bases

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Also add missing calls to `adopt()`.
This commit is contained in:
AnotherTest 2020-08-04 14:23:23 +04:30 committed by Andreas Kling
parent 12af65c1c9
commit 1d08cab9ab
Notes: sideshowbarker 2024-07-19 04:19:59 +09:00 
Author: https://github.com/alimpfard
Commit: https://github.com/SerenityOS/serenity/commit/1d08cab9ab1
Pull-request: https://github.com/SerenityOS/serenity/pull/2984
Issue: https://github.com/SerenityOS/serenity/issues/2948
Reviewed-by: https://github.com/awesomekling
5 changed files with 32 additions and 22 deletions
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14
Shell/AST.cpp
View file

@ -546,7 +546,7 @@ void CloseFdRedirection::dump(int level) const
RefPtr<Value> CloseFdRedirection::run(RefPtr<Shell>)
{
Command command;
command.redirections.append(*new CloseRedirection(m_fd));
command.redirections.append(adopt(*new CloseRedirection(m_fd)));
return create<CommandValue>(move(command));
}
@ -1122,8 +1122,8 @@ RefPtr<Value> Pipe::run(RefPtr<Shell> shell)
auto pipe_write_end = new FdRedirection(STDIN_FILENO, -1, Rewiring::Close::Destination);
auto pipe_read_end = new FdRedirection(STDOUT_FILENO, -1, pipe_write_end, Rewiring::Close::RefreshDestination);
first_in_right.redirections.append(*pipe_write_end);
last_in_left.redirections.append(*pipe_read_end);
first_in_right.redirections.append(adopt(*pipe_write_end));
last_in_left.redirections.append(adopt(*pipe_read_end));
last_in_left.should_wait = false;
last_in_left.is_pipe_source = true;
@ -1238,7 +1238,7 @@ RefPtr<Value> ReadRedirection::run(RefPtr<Shell> shell)
StringBuilder builder;
builder.join(" ", path_segments);
command.redirections.append(*new PathRedirection(builder.to_string(), m_fd, PathRedirection::Read));
command.redirections.append(adopt(*new PathRedirection(builder.to_string(), m_fd, PathRedirection::Read)));
return create<CommandValue>(move(command));
}
@ -1265,7 +1265,7 @@ RefPtr<Value> ReadWriteRedirection::run(RefPtr<Shell> shell)
StringBuilder builder;
builder.join(" ", path_segments);
command.redirections.append(*new PathRedirection(builder.to_string(), m_fd, PathRedirection::ReadWrite));
command.redirections.append(adopt(*new PathRedirection(builder.to_string(), m_fd, PathRedirection::ReadWrite)));
return create<CommandValue>(move(command));
}
@ -1758,7 +1758,7 @@ RefPtr<Value> WriteAppendRedirection::run(RefPtr<Shell> shell)
StringBuilder builder;
builder.join(" ", path_segments);
command.redirections.append(*new PathRedirection(builder.to_string(), m_fd, PathRedirection::WriteAppend));
command.redirections.append(adopt(*new PathRedirection(builder.to_string(), m_fd, PathRedirection::WriteAppend)));
return create<CommandValue>(move(command));
}
@ -1785,7 +1785,7 @@ RefPtr<Value> WriteRedirection::run(RefPtr<Shell> shell)
StringBuilder builder;
builder.join(" ", path_segments);
command.redirections.append(*new PathRedirection(builder.to_string(), m_fd, PathRedirection::Write));
command.redirections.append(adopt(*new PathRedirection(builder.to_string(), m_fd, PathRedirection::Write)));
return create<CommandValue>(move(command));
}

29
Shell/AST.h
View file

@ -48,10 +48,11 @@ struct Position {
bool contains(size_t offset) const { return start_offset <= offset && offset <= end_offset; }
};
struct FdRedirection;
struct Rewiring : public RefCounted<Rewiring> {
int source_fd { -1 };
int dest_fd { -1 };
Rewiring* other_pipe_end { nullptr };
FdRedirection* other_pipe_end { nullptr };
enum class Close {
None,
Source,
@ -67,7 +68,7 @@ struct Rewiring : public RefCounted<Rewiring> {
{
}
Rewiring(int source, int dest, Rewiring* other_end, Close close)
Rewiring(int source, int dest, FdRedirection* other_end, Close close)
: source_fd(source)
, dest_fd(dest)
, other_pipe_end(other_end)
@ -121,20 +122,30 @@ private:
virtual bool is_path_redirection() const override { return true; }
};
struct FdRedirection : public Redirection
, public Rewiring {
virtual Result<RefPtr<Rewiring>, String> apply() const override { return static_cast<RefPtr<Rewiring>>(this); }
struct FdRedirection : public Redirection {
virtual Result<RefPtr<Rewiring>, String> apply() const override
{
return RefPtr<Rewiring>(adopt(*new Rewiring(source_fd, dest_fd, other_pipe_end, action)));
}
virtual ~FdRedirection();
FdRedirection(int source, int dest, Rewiring::Close close)
: Rewiring(source, dest, close)
: FdRedirection(source, dest, nullptr, close)
{
}
FdRedirection(int source, int dest, Rewiring* pipe_end, Rewiring::Close close)
: Rewiring(source, dest, pipe_end, close)
FdRedirection(int source, int dest, FdRedirection* pipe_end, Rewiring::Close close)
: source_fd(source)
, dest_fd(dest)
, other_pipe_end(pipe_end)
, action(close)
{
}
int source_fd { -1 };
int dest_fd { -1 };
FdRedirection* other_pipe_end { nullptr };
Rewiring::Close action { Rewiring::Close::None };
private:
virtual bool is_fd_redirection() const override { return true; }
};

2
Shell/Builtin.cpp
View file

@ -698,7 +698,7 @@ int Shell::builtin_shift(int argc, const char** argv)
}
if (!argv_->is_list())
argv_ = *new AST::ListValue({ argv_ });
argv_ = adopt(*new AST::ListValue({ argv_ }));
auto& values = static_cast<AST::ListValue*>(argv_.ptr())->values();
if ((size_t)count > values.size()) {

7
Shell/Shell.cpp
View file

@ -287,8 +287,8 @@ Vector<AST::Command> Shell::expand_aliases(Vector<AST::Command> initial_commands
auto* ast = static_cast<AST::Execute*>(subcommand_ast.ptr());
subcommand_ast = ast->command();
}
AST::Node& substitute = *new AST::Join(subcommand_ast->position(), subcommand_ast, *new AST::CommandLiteral(subcommand_ast->position(), command));
for (auto& subst_command : substitute.run(*this)->resolve_as_commands(*this)) {
RefPtr<AST::Node> substitute = adopt(*new AST::Join(subcommand_ast->position(), subcommand_ast, adopt(*new AST::CommandLiteral(subcommand_ast->position(), command))));
for (auto& subst_command : substitute->run(*this)->resolve_as_commands(*this)) {
if (!subst_command.argv.is_empty() && subst_command.argv.first() == argv0) // Disallow an alias resolving to itself.
commands.append(subst_command);
else
@ -596,8 +596,7 @@ Vector<RefPtr<Job>> Shell::run_commands(Vector<AST::Command>& commands)
auto path_redir = (const AST::PathRedirection*)redir.ptr();
dbg() << "redir path " << (int)path_redir->direction << " " << path_redir->path << " <-> " << path_redir->fd;
} else if (redir->is_fd_redirection()) {
auto fd_redir = (const AST::FdRedirection*)redir.ptr();
dbg() << "redir fd " << fd_redir->source_fd << " -> " << fd_redir->dest_fd;
dbg() << "redir fd " << redir->source_fd << " -> " << redir->dest_fd;
} else if (redir->is_close_redirection()) {
auto close_redir = (const AST::CloseRedirection*)redir.ptr();
dbg() << "close fd " << close_redir->fd;

2
Shell/main.cpp
View file

@ -187,7 +187,7 @@ int main(int argc, char** argv)
Vector<String> args;
for (auto* arg : script_args)
args.empend(arg);
shell->set_local_variable("ARGV", *new AST::ListValue(move(args)));
shell->set_local_variable("ARGV", adopt(*new AST::ListValue(move(args))));
}
if (command_to_run) {