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
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
|
/*
* Copyright (c) 2020, Peter Elliott <pelliott@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Assertions.h>
#include <AK/LexicalPath.h>
#include <AK/Span.h>
#include <AK/Vector.h>
#include <LibArchive/TarStream.h>
#include <LibCompress/Gzip.h>
#include <LibCore/ArgsParser.h>
#include <LibCore/DirIterator.h>
#include <LibCore/FileStream.h>
#include <fcntl.h>
#include <stdio.h>
#include <sys/stat.h>
#include <unistd.h>
constexpr size_t buffer_size = 4096;
int main(int argc, char** argv)
{
bool create = false;
bool extract = false;
bool list = false;
bool verbose = false;
bool gzip = false;
const char* archive_file = nullptr;
Vector<const char*> paths;
Core::ArgsParser args_parser;
args_parser.add_option(create, "Create archive", "create", 'c');
args_parser.add_option(extract, "Extract archive", "extract", 'x');
args_parser.add_option(list, "List contents", "list", 't');
args_parser.add_option(verbose, "Print paths", "verbose", 'v');
args_parser.add_option(gzip, "compress or uncompress file using gzip", "gzip", 'z');
args_parser.add_option(archive_file, "Archive file", "file", 'f', "FILE");
args_parser.add_positional_argument(paths, "Paths", "PATHS", Core::ArgsParser::Required::No);
args_parser.parse(argc, argv);
if (create + extract + list != 1) {
warnln("exactly one of -c, -x, and -t can be used");
return 1;
}
if (list || extract) {
auto file = Core::File::standard_input();
if (archive_file) {
auto maybe_file = Core::File::open(archive_file, Core::OpenMode::ReadOnly);
if (maybe_file.is_error()) {
warnln("Core::File::open: {}", maybe_file.error());
return 1;
}
file = maybe_file.value();
}
Core::InputFileStream file_stream(file);
Compress::GzipDecompressor gzip_stream(file_stream);
InputStream& file_input_stream = file_stream;
InputStream& gzip_input_stream = gzip_stream;
Archive::TarInputStream tar_stream((gzip) ? gzip_input_stream : file_input_stream);
if (!tar_stream.valid()) {
warnln("the provided file is not a well-formatted ustar file");
return 1;
}
for (; !tar_stream.finished(); tar_stream.advance()) {
if (list || verbose)
outln("{}", tar_stream.header().filename());
if (extract) {
Archive::TarFileStream file_stream = tar_stream.file_contents();
const Archive::TarFileHeader& header = tar_stream.header();
switch (header.type_flag()) {
case Archive::TarFileType::NormalFile:
case Archive::TarFileType::AlternateNormalFile: {
int fd = open(String(header.filename()).characters(), O_CREAT | O_WRONLY, header.mode());
if (fd < 0) {
perror("open");
return 1;
}
Array<u8, buffer_size> buffer;
size_t nread;
while ((nread = file_stream.read(buffer)) > 0) {
if (write(fd, buffer.data(), nread) < 0) {
perror("write");
return 1;
}
}
close(fd);
break;
}
case Archive::TarFileType::Directory: {
if (mkdir(String(header.filename()).characters(), header.mode())) {
perror("mkdir");
return 1;
}
break;
}
case Archive::TarFileType::GlobalExtendedHeader: {
dbgln("ignoring global extended header: {}", header.filename());
break;
}
case Archive::TarFileType::ExtendedHeader: {
dbgln("ignoring extended header: {}", header.filename());
break;
}
default:
// FIXME: Implement other file types
warnln("file type '{}' of {} is not yet supported", (char)header.type_flag(), header.filename());
VERIFY_NOT_REACHED();
}
}
}
file_stream.close();
return 0;
}
if (create) {
if (paths.size() == 0) {
warnln("you must provide at least one path to be archived");
return 1;
}
auto file = Core::File::standard_output();
if (archive_file) {
auto maybe_file = Core::File::open(archive_file, Core::OpenMode::WriteOnly);
if (maybe_file.is_error()) {
warnln("Core::File::open: {}", maybe_file.error());
return 1;
}
file = maybe_file.value();
}
Core::OutputFileStream file_stream(file);
Compress::GzipCompressor gzip_stream(file_stream);
OutputStream& file_output_stream = file_stream;
OutputStream& gzip_output_stream = gzip_stream;
Archive::TarOutputStream tar_stream((gzip) ? gzip_output_stream : file_output_stream);
auto add_file = [&](String path) {
auto file = Core::File::construct(path);
if (!file->open(Core::OpenMode::ReadOnly)) {
warnln("Failed to open {}: {}", path, file->error_string());
return;
}
struct stat statbuf;
if (lstat(path.characters(), &statbuf) < 0) {
warnln("Failed stating {}", path);
return;
}
auto canonicalized_path = LexicalPath::canonicalized_path(path);
tar_stream.add_file(canonicalized_path, statbuf.st_mode, file->read_all());
if (verbose)
outln("{}", canonicalized_path);
};
auto add_directory = [&](String path, auto handle_directory) -> void {
struct stat statbuf;
if (lstat(path.characters(), &statbuf) < 0) {
warnln("Failed stating {}", path);
return;
}
auto canonicalized_path = LexicalPath::canonicalized_path(path);
tar_stream.add_directory(canonicalized_path, statbuf.st_mode);
if (verbose)
outln("{}", canonicalized_path);
Core::DirIterator it(path, Core::DirIterator::Flags::SkipParentAndBaseDir);
while (it.has_next()) {
auto child_path = it.next_full_path();
if (!Core::File::is_directory(child_path)) {
add_file(child_path);
} else {
handle_directory(child_path, handle_directory);
}
}
};
for (auto const& path : paths) {
if (Core::File::is_directory(path)) {
add_directory(path, add_directory);
} else {
add_file(path);
}
}
tar_stream.finish();
return 0;
}
return 0;
}
|
