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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "Shell.h"
#include <LibCore/ArgsParser.h>
#include <LibCore/Event.h>
#include <LibCore/EventLoop.h>
#include <LibCore/File.h>
#include <errno.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
RefPtr<Line::Editor> editor;
Shell::Shell* s_shell;
int main(int argc, char** argv)
{
Core::EventLoop loop;
Core::EventLoop::register_signal(SIGINT, [](int) {
s_shell->kill_job(s_shell->current_job(), SIGINT);
});
Core::EventLoop::register_signal(SIGWINCH, [](int) {
s_shell->kill_job(s_shell->current_job(), SIGWINCH);
});
Core::EventLoop::register_signal(SIGTTIN, [](int) {});
Core::EventLoop::register_signal(SIGTTOU, [](int) {});
Core::EventLoop::register_signal(SIGHUP, [](int) {
for (auto& it : s_shell->jobs)
s_shell->kill_job(it.value.ptr(), SIGHUP);
s_shell->editor()->save_history(s_shell->get_history_path());
});
#ifdef __serenity__
if (pledge("stdio rpath wpath cpath proc exec tty accept sigaction unix fattr", nullptr) < 0) {
perror("pledge");
return 1;
}
#endif
RefPtr<::Shell::Shell> shell;
bool attempt_interactive = false;
auto initialize = [&] {
editor = Line::Editor::construct();
editor->initialize();
shell = Shell::Shell::construct(*editor, attempt_interactive);
s_shell = shell.ptr();
s_shell->setup_signals();
#ifndef __serenity__
sigset_t blocked;
sigemptyset(&blocked);
sigaddset(&blocked, SIGTTOU);
sigaddset(&blocked, SIGTTIN);
pthread_sigmask(SIG_BLOCK, &blocked, nullptr);
#endif
shell->termios = editor->termios();
shell->default_termios = editor->default_termios();
editor->on_display_refresh = [&](auto& editor) {
editor.strip_styles();
if (shell->should_format_live()) {
auto line = editor.line();
ssize_t cursor = editor.cursor();
editor.clear_line();
editor.insert(shell->format(line, cursor));
if (cursor >= 0)
editor.set_cursor(cursor);
}
shell->highlight(editor);
};
editor->on_tab_complete = [&](const Line::Editor&) {
return shell->complete();
};
};
const char* command_to_run = nullptr;
const char* file_to_read_from = nullptr;
Vector<const char*> script_args;
bool skip_rc_files = false;
const char* format = nullptr;
bool should_format_live = false;
Core::ArgsParser parser;
parser.add_option(command_to_run, "String to read commands from", "command-string", 'c', "command-string");
parser.add_option(skip_rc_files, "Skip running shellrc files", "skip-shellrc", 0);
parser.add_option(format, "Format the given file into stdout and exit", "format", 0, "file");
parser.add_option(should_format_live, "Enable live formatting", "live-formatting", 'f');
parser.add_positional_argument(file_to_read_from, "File to read commands from", "file", Core::ArgsParser::Required::No);
parser.add_positional_argument(script_args, "Extra arguments to pass to the script (via $* and co)", "argument", Core::ArgsParser::Required::No);
parser.parse(argc, argv);
if (format) {
auto file = Core::File::open(format, Core::IODevice::ReadOnly);
if (file.is_error()) {
fprintf(stderr, "Error: %s", file.error().characters());
return 1;
}
initialize();
ssize_t cursor = -1;
puts(shell->format(file.value()->read_all(), cursor).characters());
return 0;
}
auto pid = getpid();
if (auto sid = getsid(pid); sid == 0) {
if (setsid() < 0) {
perror("setsid");
// Let's just hope that it's ok.
}
} else if (sid != pid) {
if (getpgid(pid) != pid) {
dbgln("We were already in a session with sid={} (we are {}), let's do some gymnastics", sid, pid);
if (setpgid(pid, sid) < 0) {
auto strerr = strerror(errno);
dbgln("couldn't setpgid: {}", strerr);
}
if (setsid() < 0) {
auto strerr = strerror(errno);
dbgln("couldn't setsid: {}", strerr);
}
}
}
auto execute_file = file_to_read_from && StringView { "-" } != file_to_read_from;
attempt_interactive = !execute_file;
initialize();
shell->set_live_formatting(should_format_live);
shell->current_script = argv[0];
if (!skip_rc_files) {
auto run_rc_file = [&](auto& name) {
String file_path = name;
if (file_path.starts_with('~'))
file_path = shell->expand_tilde(file_path);
if (Core::File::exists(file_path)) {
shell->run_file(file_path, false);
}
};
run_rc_file(Shell::Shell::global_init_file_path);
run_rc_file(Shell::Shell::local_init_file_path);
}
{
Vector<String> args;
for (auto* arg : script_args)
args.empend(arg);
shell->set_local_variable("ARGV", adopt_ref(*new Shell::AST::ListValue(move(args))));
}
if (command_to_run) {
dbgln("sh -c '{}'\n", command_to_run);
return shell->run_command(command_to_run);
}
if (execute_file) {
if (shell->run_file(file_to_read_from))
return 0;
return 1;
}
shell->add_child(*editor);
Core::EventLoop::current().post_event(*shell, make<Core::CustomEvent>(Shell::Shell::ShellEventType::ReadLine));
return loop.exec();
}
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