mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-11-23 08:00:20 +00:00
a9053618a8
This has previously been incorrectly handled in a variety of applications, e.g. subsections were not accounted for.
115 lines
4 KiB
C++
115 lines
4 KiB
C++
/*
|
|
* Copyright (c) 2019-2020, Sergey Bugaev <bugaevc@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <AK/Assertions.h>
|
|
#include <AK/ByteBuffer.h>
|
|
#include <AK/String.h>
|
|
#include <AK/Utf8View.h>
|
|
#include <LibCore/ArgsParser.h>
|
|
#include <LibCore/File.h>
|
|
#include <LibCore/System.h>
|
|
#include <LibMain/Main.h>
|
|
#include <LibManual/Node.h>
|
|
#include <LibManual/PageNode.h>
|
|
#include <LibManual/SectionNode.h>
|
|
#include <LibMarkdown/Document.h>
|
|
#include <spawn.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/wait.h>
|
|
#include <unistd.h>
|
|
|
|
static ErrorOr<pid_t> pipe_to_pager(StringView command)
|
|
{
|
|
StringBuilder builder;
|
|
TRY(builder.try_append(command));
|
|
TRY(builder.try_append('\0'));
|
|
auto shell_command = builder.string_view().characters_without_null_termination();
|
|
|
|
char const* argv[] = { "Shell", "-c", shell_command, nullptr };
|
|
|
|
auto stdout_pipe = TRY(Core::System::pipe2(O_CLOEXEC));
|
|
|
|
posix_spawn_file_actions_t action;
|
|
posix_spawn_file_actions_init(&action);
|
|
posix_spawn_file_actions_adddup2(&action, stdout_pipe[0], STDIN_FILENO);
|
|
|
|
pid_t pid = TRY(Core::System::posix_spawnp("/bin/Shell"sv, &action, nullptr, const_cast<char**>(argv), environ));
|
|
posix_spawn_file_actions_destroy(&action);
|
|
|
|
TRY(Core::System::dup2(stdout_pipe[1], STDOUT_FILENO));
|
|
TRY(Core::System::close(stdout_pipe[1]));
|
|
TRY(Core::System::close(stdout_pipe[0]));
|
|
return pid;
|
|
}
|
|
|
|
ErrorOr<int> serenity_main(Main::Arguments arguments)
|
|
{
|
|
int view_width = 0;
|
|
if (isatty(STDOUT_FILENO) != 0) {
|
|
struct winsize ws;
|
|
if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == 0)
|
|
view_width = ws.ws_col;
|
|
}
|
|
|
|
if (view_width == 0)
|
|
view_width = 80;
|
|
|
|
TRY(Core::System::pledge("stdio rpath exec proc"));
|
|
TRY(Core::System::unveil("/usr/share/man", "r"));
|
|
TRY(Core::System::unveil("/bin", "x"));
|
|
TRY(Core::System::unveil(nullptr, nullptr));
|
|
|
|
StringView section_argument;
|
|
StringView name_argument;
|
|
String pager;
|
|
|
|
Core::ArgsParser args_parser;
|
|
args_parser.set_general_help("Read manual pages. Try 'man man' to get started.");
|
|
args_parser.add_positional_argument(section_argument, "Section of the man page", "section");
|
|
args_parser.add_positional_argument(name_argument, "Name of the man page", "name", Core::ArgsParser::Required::No);
|
|
args_parser.add_option(pager, "Pager to pipe the man page to", "pager", 'P', "pager");
|
|
args_parser.parse(arguments);
|
|
Vector<StringView, 2> query_parameters;
|
|
if (!section_argument.is_empty())
|
|
query_parameters.append(section_argument);
|
|
if (!name_argument.is_empty())
|
|
query_parameters.append(name_argument);
|
|
|
|
auto page = TRY(Manual::Node::try_create_from_query(query_parameters));
|
|
auto page_name = TRY(page->name());
|
|
auto section_number = TRY(String::number(page->section_number()));
|
|
|
|
if (pager.is_empty())
|
|
pager = TRY(String::formatted("less -P 'Manual Page {}({}) line %l?e (END):.'",
|
|
TRY(page_name.replace("'"sv, "'\\''"sv, ReplaceMode::FirstOnly)),
|
|
section_number));
|
|
pid_t pager_pid = TRY(pipe_to_pager(pager));
|
|
|
|
auto file = TRY(Core::File::open(TRY(page->path()), Core::File::OpenMode::Read));
|
|
|
|
TRY(Core::System::pledge("stdio proc"));
|
|
|
|
dbgln("Loading man page from {}", TRY(page->path()));
|
|
auto buffer = TRY(file->read_until_eof());
|
|
|
|
auto const title = TRY("SerenityOS manual"_string);
|
|
|
|
int spaces = max(view_width / 2 - page_name.code_points().length() - section_number.code_points().length() - title.code_points().length() / 2 - 4, 0);
|
|
outln("{}({}){}{}", page_name, section_number, String::repeated(' ', spaces), title);
|
|
|
|
auto document = Markdown::Document::parse(buffer);
|
|
VERIFY(document);
|
|
|
|
auto rendered = TRY(document->render_for_terminal(view_width));
|
|
outln("{}", rendered);
|
|
|
|
// FIXME: Remove this wait, it shouldn't be necessary but Shell does not
|
|
// resume properly without it. This wait also breaks <C-z> backgrounding
|
|
fclose(stdout);
|
|
int wstatus;
|
|
waitpid(pager_pid, &wstatus, 0);
|
|
return 0;
|
|
}
|