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
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
|
/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <AK/LexicalPath.h>
#include <AK/String.h>
#include <AK/StringBuilder.h>
#include <LibCore/ArgsParser.h>
#include <LibCore/DirIterator.h>
#include <LibCore/File.h>
#include <assert.h>
#include <fcntl.h>
#include <stdio.h>
#include <sys/stat.h>
#include <unistd.h>
bool copy_file_or_directory(String, String, bool, bool);
bool copy_file(String, String, const struct stat&, int);
bool copy_directory(String, String, bool);
static mode_t my_umask = 0;
int main(int argc, char** argv)
{
if (pledge("stdio rpath wpath cpath fattr", nullptr) < 0) {
perror("pledge");
return 1;
}
bool link = false;
bool recursion_allowed = false;
bool verbose = false;
Vector<const char*> sources;
const char* destination = nullptr;
Core::ArgsParser args_parser;
args_parser.add_option(link, "Link files instead of copying", "link", 'l');
args_parser.add_option(recursion_allowed, "Copy directories recursively", "recursive", 'R');
args_parser.add_option(recursion_allowed, "Same as -R", nullptr, 'r');
args_parser.add_option(verbose, "Verbose", "verbose", 'v');
args_parser.add_positional_argument(sources, "Source file path", "source");
args_parser.add_positional_argument(destination, "Destination file path", "destination");
args_parser.parse(argc, argv);
auto my_umask = umask(0);
umask(my_umask);
for (auto& source : sources) {
bool ok = copy_file_or_directory(source, destination, recursion_allowed, link);
if (!ok)
return 1;
if (verbose)
printf("'%s' -> '%s'\n", source, destination);
}
return 0;
}
/**
* Copy a file or directory to a new location. Returns true if successful, false
* otherwise. If there is an error, its description is output to stderr.
*
* Directories should only be copied if recursion_allowed is set.
*/
bool copy_file_or_directory(String src_path, String dst_path, bool recursion_allowed, bool link)
{
int src_fd = open(src_path.characters(), O_RDONLY);
if (src_fd < 0) {
perror("open src");
return false;
}
struct stat src_stat;
int rc = fstat(src_fd, &src_stat);
if (rc < 0) {
perror("stat src");
return false;
}
if (S_ISDIR(src_stat.st_mode)) {
if (!recursion_allowed) {
fprintf(stderr, "cp: -R not specified; omitting directory '%s'\n", src_path.characters());
return false;
}
return copy_directory(src_path, dst_path, link);
}
if (link) {
if (::link(src_path.characters(), dst_path.characters()) < 0) {
perror("link");
return false;
}
return true;
}
return copy_file(src_path, dst_path, src_stat, src_fd);
}
/**
* Copy a source file to a destination file. Returns true if successful, false
* otherwise. If there is an error, its description is output to stderr.
*
* To avoid repeated work, the source file's stat and file descriptor are required.
*/
bool copy_file(String src_path, String dst_path, const struct stat& src_stat, int src_fd)
{
// NOTE: We don't copy the set-uid and set-gid bits.
mode_t mode = (src_stat.st_mode & ~my_umask) & ~06000;
int dst_fd = creat(dst_path.characters(), mode);
if (dst_fd < 0) {
if (errno != EISDIR) {
perror("open dst");
return false;
}
StringBuilder builder;
builder.append(dst_path);
builder.append('/');
builder.append(LexicalPath(src_path).basename());
dst_path = builder.to_string();
dst_fd = creat(dst_path.characters(), 0666);
if (dst_fd < 0) {
perror("open dst");
return false;
}
}
if (src_stat.st_size > 0) {
if (ftruncate(dst_fd, src_stat.st_size) < 0) {
perror("cp: ftruncate");
return false;
}
}
for (;;) {
char buffer[32768];
ssize_t nread = read(src_fd, buffer, sizeof(buffer));
if (nread < 0) {
perror("read src");
return false;
}
if (nread == 0)
break;
ssize_t remaining_to_write = nread;
char* bufptr = buffer;
while (remaining_to_write) {
ssize_t nwritten = write(dst_fd, bufptr, remaining_to_write);
if (nwritten < 0) {
perror("write dst");
return false;
}
assert(nwritten > 0);
remaining_to_write -= nwritten;
bufptr += nwritten;
}
}
close(src_fd);
close(dst_fd);
return true;
}
/**
* Copy the contents of a source directory into a destination directory.
*/
bool copy_directory(String src_path, String dst_path, bool link)
{
int rc = mkdir(dst_path.characters(), 0755);
if (rc < 0) {
perror("cp: mkdir");
return false;
}
String src_rp = Core::File::real_path_for(src_path);
src_rp = String::format("%s/", src_rp.characters());
String dst_rp = Core::File::real_path_for(dst_path);
dst_rp = String::format("%s/", dst_rp.characters());
if (!dst_rp.is_empty() && dst_rp.starts_with(src_rp)) {
fprintf(stderr, "cp: Cannot copy %s into itself (%s)\n",
src_path.characters(), dst_path.characters());
return false;
}
Core::DirIterator di(src_path, Core::DirIterator::SkipDots);
if (di.has_error()) {
fprintf(stderr, "cp: DirIterator: %s\n", di.error_string());
return false;
}
while (di.has_next()) {
String filename = di.next_path();
bool is_copied = copy_file_or_directory(
String::format("%s/%s", src_path.characters(), filename.characters()),
String::format("%s/%s", dst_path.characters(), filename.characters()),
true, link);
if (!is_copied) {
return false;
}
}
return true;
}
|
