ladybird/Userland/Utilities/man.cpp

102 lines
2.5 KiB
C++
Raw Normal View History

/*
* Copyright (c) 2019-2020, Sergey Bugaev <bugaevc@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/ByteBuffer.h>
2019-09-20 21:46:47 +00:00
#include <AK/String.h>
2020-02-18 08:54:29 +00:00
#include <LibCore/ArgsParser.h>
#include <LibCore/File.h>
#include <LibMarkdown/Document.h>
2019-09-20 21:46:47 +00:00
#include <stdio.h>
#include <sys/ioctl.h>
2019-09-20 21:46:47 +00:00
#include <unistd.h>
int main(int argc, char* argv[])
{
int view_width = 0;
if (isatty(STDOUT_FILENO)) {
struct winsize ws;
if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == 0)
view_width = ws.ws_col;
}
if (view_width == 0)
view_width = 80;
2020-01-13 00:32:01 +00:00
if (pledge("stdio rpath", nullptr) < 0) {
perror("pledge");
return 1;
}
2020-01-22 10:36:22 +00:00
if (unveil("/usr/share/man", "r") < 0) {
perror("unveil");
return 1;
}
unveil(nullptr, nullptr);
2020-02-18 08:54:29 +00:00
const char* section = nullptr;
const char* name = nullptr;
2019-09-20 21:46:47 +00:00
2020-02-18 08:54:29 +00:00
Core::ArgsParser args_parser;
args_parser.set_general_help("Read manual pages. Try 'man man' to get started.");
2020-02-18 08:54:29 +00:00
args_parser.add_positional_argument(section, "Section of the man page", "section", Core::ArgsParser::Required::No);
args_parser.add_positional_argument(name, "Name of the man page", "name");
2019-09-20 21:46:47 +00:00
2020-02-18 08:54:29 +00:00
args_parser.parse(argc, argv);
2019-09-20 21:46:47 +00:00
2020-02-18 08:54:29 +00:00
auto make_path = [name](const char* section) {
return String::formatted("/usr/share/man/man{}/{}.md", section, name);
2019-09-20 21:46:47 +00:00
};
2020-02-18 08:54:29 +00:00
if (!section) {
const char* sections[] = {
2019-09-20 21:46:47 +00:00
"1",
"2",
"3",
"4",
"5",
"6",
"7",
"8"
};
2020-02-18 08:54:29 +00:00
for (auto s : sections) {
2019-09-20 21:46:47 +00:00
String path = make_path(s);
if (access(path.characters(), R_OK) == 0) {
section = s;
break;
}
}
2020-02-18 08:54:29 +00:00
if (!section) {
fprintf(stderr, "No man page for %s\n", name);
2019-09-20 21:46:47 +00:00
exit(1);
}
}
auto file = Core::File::construct();
2019-09-20 21:46:47 +00:00
file->set_filename(make_path(section));
if (!file->open(Core::OpenMode::ReadOnly)) {
2019-09-20 21:46:47 +00:00
perror("Failed to open man page file");
exit(1);
}
2020-01-13 00:32:01 +00:00
if (pledge("stdio", nullptr) < 0) {
perror("pledge");
return 1;
}
dbgln("Loading man page from {}", file->filename());
2019-09-20 21:46:47 +00:00
auto buffer = file->read_all();
auto source = String::copy(buffer);
2019-09-20 21:46:47 +00:00
2020-02-18 08:54:29 +00:00
printf("%s(%s)\t\tSerenityOS manual\n", name, section);
2019-09-20 21:46:47 +00:00
auto document = Markdown::Document::parse(source);
VERIFY(document);
2019-09-20 21:46:47 +00:00
String rendered = document->render_for_terminal(view_width);
2019-09-20 21:46:47 +00:00
printf("%s", rendered.characters());
}