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/*
* Copyright (c) 2020, The SerenityOS developers.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "Job.h"
#include "Parser.h"
#include <AK/CircularQueue.h>
#include <AK/HashMap.h>
#include <AK/String.h>
#include <AK/StringBuilder.h>
#include <AK/Types.h>
#include <AK/Vector.h>
#include <LibCore/Notifier.h>
#include <LibCore/Object.h>
#include <LibLine/Editor.h>
#include <termios.h>
struct ExitCodeOrContinuationRequest {
enum ContinuationRequest {
Nothing,
Pipe,
DoubleQuotedString,
SingleQuotedString,
};
ExitCodeOrContinuationRequest(ContinuationRequest continuation)
: continuation(continuation)
{
}
ExitCodeOrContinuationRequest(int exit)
: exit_code(exit)
{
}
bool has_value() const { return exit_code.has_value(); }
int value() const
{
ASSERT(has_value());
return exit_code.value();
}
Optional<int> exit_code;
ContinuationRequest continuation { Nothing };
};
using ContinuationRequest = ExitCodeOrContinuationRequest::ContinuationRequest;
#define ENUMERATE_SHELL_BUILTINS() \
__ENUMERATE_SHELL_BUILTIN(cd) \
__ENUMERATE_SHELL_BUILTIN(cdh) \
__ENUMERATE_SHELL_BUILTIN(pwd) \
__ENUMERATE_SHELL_BUILTIN(exit) \
__ENUMERATE_SHELL_BUILTIN(export) \
__ENUMERATE_SHELL_BUILTIN(unset) \
__ENUMERATE_SHELL_BUILTIN(history) \
__ENUMERATE_SHELL_BUILTIN(umask) \
__ENUMERATE_SHELL_BUILTIN(dirs) \
__ENUMERATE_SHELL_BUILTIN(pushd) \
__ENUMERATE_SHELL_BUILTIN(popd) \
__ENUMERATE_SHELL_BUILTIN(time) \
__ENUMERATE_SHELL_BUILTIN(jobs) \
__ENUMERATE_SHELL_BUILTIN(fg) \
__ENUMERATE_SHELL_BUILTIN(bg)
class Shell;
class Shell : public Core::Object {
C_OBJECT(Shell);
public:
ExitCodeOrContinuationRequest run_command(const StringView&);
bool run_builtin(int argc, const char** argv, int& retval);
String prompt() const;
static String expand_tilde(const String&);
static Vector<String> expand_globs(const StringView& path, const StringView& base);
Vector<String> expand_parameters(const StringView&) const;
static String escape_token(const String& token);
static String unescape_token(const String& token);
static bool is_glob(const StringView&);
static Vector<StringView> split_path(const StringView&);
Vector<String> process_arguments(const Vector<Token>&);
static ContinuationRequest is_complete(const Vector<Command>&);
void highlight(Line::Editor&) const;
Vector<Line::CompletionSuggestion> complete_first(const String&);
Vector<Line::CompletionSuggestion> complete_other(const String&);
String get_history_path();
void load_history();
void save_history();
void print_path(const String& path);
bool should_read_more() const { return m_should_continue != ContinuationRequest::Nothing; }
void finish_command() { m_should_break_current_command = true; }
void read_single_line();
struct termios termios;
struct termios default_termios;
bool was_interrupted { false };
bool was_resized { false };
String cwd;
String username;
String home;
constexpr static auto TTYNameSize = 32;
constexpr static auto HostNameSize = 64;
char ttyname[TTYNameSize];
char hostname[HostNameSize];
uid_t uid;
int last_return_code { 0 };
Vector<String> directory_stack;
CircularQueue<String, 8> cd_history; // FIXME: have a configurable cd history length
HashMap<u64, OwnPtr<Job>> jobs;
Vector<String, 256> cached_path;
enum ShellEventType {
ReadLine,
ChildExited,
};
private:
Shell();
virtual ~Shell() override;
struct SpawnedProcess {
String name;
pid_t pid;
};
void cache_path();
IterationDecision wait_for_pid(const SpawnedProcess&, bool is_first_command_in_chain, int& return_value);
virtual void custom_event(Core::CustomEvent&) override;
#define __ENUMERATE_SHELL_BUILTIN(builtin) \
int builtin_##builtin(int argc, const char** argv);
ENUMERATE_SHELL_BUILTINS();
#undef __ENUMERATE_SHELL_BUILTIN
ExitCodeOrContinuationRequest::ContinuationRequest m_should_continue { ExitCodeOrContinuationRequest::Nothing };
StringBuilder m_complete_line_builder;
bool m_should_break_current_command { false };
};
static constexpr bool is_word_character(char c)
{
return c == '_' || (c <= 'Z' && c >= 'A') || (c <= 'z' && c >= 'a');
}
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