1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
|
/*
* 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 <LibCore/ArgsParser.h>
#include <LibCore/File.h>
#include <LibMarkdown/Document.h>
#include <stdio.h>
#include <sys/ioctl.h>
#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;
if (pledge("stdio rpath", nullptr) < 0) {
perror("pledge");
return 1;
}
if (unveil("/usr/share/man", "r") < 0) {
perror("unveil");
return 1;
}
unveil(nullptr, nullptr);
const char* section = nullptr;
const char* name = nullptr;
Core::ArgsParser args_parser;
args_parser.set_general_help("Read manual pages. Try 'man man' to get started.");
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");
args_parser.parse(argc, argv);
auto make_path = [name](const char* section) {
return String::formatted("/usr/share/man/man{}/{}.md", section, name);
};
if (!section) {
const char* sections[] = {
"1",
"2",
"3",
"4",
"5",
"6",
"7",
"8"
};
for (auto s : sections) {
String path = make_path(s);
if (access(path.characters(), R_OK) == 0) {
section = s;
break;
}
}
if (!section) {
warnln("No man page for {}", name);
exit(1);
}
}
auto file = Core::File::construct();
file->set_filename(make_path(section));
if (!file->open(Core::OpenMode::ReadOnly)) {
perror("Failed to open man page file");
exit(1);
}
if (pledge("stdio", nullptr) < 0) {
perror("pledge");
return 1;
}
dbgln("Loading man page from {}", file->filename());
auto buffer = file->read_all();
auto source = String::copy(buffer);
outln("{}({})\t\tSerenityOS manual", name, section);
auto document = Markdown::Document::parse(source);
VERIFY(document);
String rendered = document->render_for_terminal(view_width);
out("{}", rendered);
}
|
