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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "TerminalWrapper.h"
#include <AK/String.h>
#include <LibCore/ConfigFile.h>
#include <LibGUI/BoxLayout.h>
#include <LibGUI/MessageBox.h>
#include <LibVT/TerminalWidget.h>
#include <fcntl.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
namespace HackStudio {
void TerminalWrapper::run_command(const String& command)
{
if (m_pid != -1) {
GUI::MessageBox::show(window(),
"A command is already running in this TerminalWrapper",
"Can't run command",
GUI::MessageBox::Type::Error);
return;
}
int ptm_fd = posix_openpt(O_RDWR | O_CLOEXEC);
if (ptm_fd < 0) {
perror("posix_openpt");
VERIFY_NOT_REACHED();
}
if (grantpt(ptm_fd) < 0) {
perror("grantpt");
VERIFY_NOT_REACHED();
}
if (unlockpt(ptm_fd) < 0) {
perror("unlockpt");
VERIFY_NOT_REACHED();
}
m_terminal_widget->set_pty_master_fd(ptm_fd);
m_terminal_widget->on_command_exit = [this] {
int wstatus;
int rc = waitpid(m_pid, &wstatus, 0);
if (rc < 0) {
perror("waitpid");
VERIFY_NOT_REACHED();
}
if (WIFEXITED(wstatus)) {
m_terminal_widget->inject_string(String::formatted("\033[{};1m(Command exited with code {})\033[0m\n", wstatus == 0 ? 32 : 31, WEXITSTATUS(wstatus)));
} else if (WIFSTOPPED(wstatus)) {
m_terminal_widget->inject_string("\033[34;1m(Command stopped!)\033[0m\n");
} else if (WIFSIGNALED(wstatus)) {
m_terminal_widget->inject_string(String::formatted("\033[34;1m(Command signaled with {}!)\033[0m\n", strsignal(WTERMSIG(wstatus))));
}
m_pid = -1;
if (on_command_exit)
on_command_exit();
};
m_pid = fork();
if (m_pid < 0) {
perror("fork");
return;
}
if (m_pid == 0) {
// Create a new process group.
setsid();
const char* tty_name = ptsname(ptm_fd);
if (!tty_name) {
perror("ptsname");
exit(1);
}
close(ptm_fd);
int pts_fd = open(tty_name, O_RDWR);
if (pts_fd < 0) {
perror("open");
exit(1);
}
tcsetpgrp(pts_fd, getpid());
// NOTE: It's okay if this fails.
int rc = ioctl(0, TIOCNOTTY);
close(0);
close(1);
close(2);
rc = dup2(pts_fd, 0);
if (rc < 0) {
perror("dup2");
exit(1);
}
rc = dup2(pts_fd, 1);
if (rc < 0) {
perror("dup2");
exit(1);
}
rc = dup2(pts_fd, 2);
if (rc < 0) {
perror("dup2");
exit(1);
}
rc = close(pts_fd);
if (rc < 0) {
perror("close");
exit(1);
}
rc = ioctl(0, TIOCSCTTY);
if (rc < 0) {
perror("ioctl(TIOCSCTTY)");
exit(1);
}
setenv("TERM", "xterm", true);
auto parts = command.split(' ');
VERIFY(!parts.is_empty());
const char** args = (const char**)calloc(parts.size() + 1, sizeof(const char*));
for (size_t i = 0; i < parts.size(); i++) {
args[i] = parts[i].characters();
}
rc = execvp(args[0], const_cast<char**>(args));
if (rc < 0) {
perror("execve");
exit(1);
}
VERIFY_NOT_REACHED();
}
// (In parent process)
terminal().scroll_to_bottom();
}
void TerminalWrapper::kill_running_command()
{
VERIFY(m_pid != -1);
// Kill our child process and its whole process group.
[[maybe_unused]] auto rc = killpg(m_pid, SIGTERM);
}
TerminalWrapper::TerminalWrapper(bool user_spawned)
: m_user_spawned(user_spawned)
{
set_layout<GUI::VerticalBoxLayout>();
RefPtr<Core::ConfigFile> config = Core::ConfigFile::get_for_app("Terminal");
m_terminal_widget = add<VT::TerminalWidget>(-1, false, config);
if (user_spawned)
run_command("Shell");
}
TerminalWrapper::~TerminalWrapper()
{
}
}
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