Line data Source code
1 : /* SPDX-License-Identifier: LGPL-2.1+ */
2 :
3 : #include <unistd.h>
4 :
5 : #include "alloc-util.h"
6 : #include "copy.h"
7 : #include "fd-util.h"
8 : #include "fileio.h"
9 : #include "fs-util.h"
10 : #include "log.h"
11 : #include "macro.h"
12 : #include "mkdir.h"
13 : #include "path-util.h"
14 : #include "rm-rf.h"
15 : #include "string-util.h"
16 : #include "strv.h"
17 : #include "tests.h"
18 : #include "tmpfile-util.h"
19 : #include "user-util.h"
20 : #include "util.h"
21 :
22 1 : static void test_copy_file(void) {
23 1 : _cleanup_free_ char *buf = NULL;
24 1 : char fn[] = "/tmp/test-copy_file.XXXXXX";
25 1 : char fn_copy[] = "/tmp/test-copy_file.XXXXXX";
26 1 : size_t sz = 0;
27 : int fd;
28 :
29 1 : log_info("%s", __func__);
30 :
31 1 : fd = mkostemp_safe(fn);
32 1 : assert_se(fd >= 0);
33 1 : close(fd);
34 :
35 1 : fd = mkostemp_safe(fn_copy);
36 1 : assert_se(fd >= 0);
37 1 : close(fd);
38 :
39 1 : assert_se(write_string_file(fn, "foo bar bar bar foo", WRITE_STRING_FILE_CREATE) == 0);
40 :
41 1 : assert_se(copy_file(fn, fn_copy, 0, 0644, 0, 0, COPY_REFLINK) == 0);
42 :
43 1 : assert_se(read_full_file(fn_copy, &buf, &sz) == 0);
44 1 : assert_se(streq(buf, "foo bar bar bar foo\n"));
45 1 : assert_se(sz == 20);
46 :
47 1 : unlink(fn);
48 1 : unlink(fn_copy);
49 1 : }
50 :
51 1 : static void test_copy_file_fd(void) {
52 1 : char in_fn[] = "/tmp/test-copy-file-fd-XXXXXX";
53 1 : char out_fn[] = "/tmp/test-copy-file-fd-XXXXXX";
54 1 : _cleanup_close_ int in_fd = -1, out_fd = -1;
55 1 : const char *text = "boohoo\nfoo\n\tbar\n";
56 1 : char buf[64] = {};
57 :
58 1 : log_info("%s", __func__);
59 :
60 1 : in_fd = mkostemp_safe(in_fn);
61 1 : assert_se(in_fd >= 0);
62 1 : out_fd = mkostemp_safe(out_fn);
63 1 : assert_se(out_fd >= 0);
64 :
65 1 : assert_se(write_string_file(in_fn, text, WRITE_STRING_FILE_CREATE) == 0);
66 1 : assert_se(copy_file_fd("/a/file/which/does/not/exist/i/guess", out_fd, COPY_REFLINK) < 0);
67 1 : assert_se(copy_file_fd(in_fn, out_fd, COPY_REFLINK) >= 0);
68 1 : assert_se(lseek(out_fd, SEEK_SET, 0) == 0);
69 :
70 1 : assert_se(read(out_fd, buf, sizeof buf) == (ssize_t) strlen(text));
71 1 : assert_se(streq(buf, text));
72 :
73 1 : unlink(in_fn);
74 1 : unlink(out_fn);
75 1 : }
76 :
77 1 : static void test_copy_tree(void) {
78 1 : char original_dir[] = "/tmp/test-copy_tree/";
79 1 : char copy_dir[] = "/tmp/test-copy_tree-copy/";
80 1 : char **files = STRV_MAKE("file", "dir1/file", "dir1/dir2/file", "dir1/dir2/dir3/dir4/dir5/file");
81 1 : char **links = STRV_MAKE("link", "file",
82 : "link2", "dir1/file");
83 : char **p, **link;
84 : const char *unixsockp;
85 : struct stat st;
86 :
87 1 : log_info("%s", __func__);
88 :
89 1 : (void) rm_rf(copy_dir, REMOVE_ROOT|REMOVE_PHYSICAL);
90 1 : (void) rm_rf(original_dir, REMOVE_ROOT|REMOVE_PHYSICAL);
91 :
92 5 : STRV_FOREACH(p, files) {
93 4 : _cleanup_free_ char *f;
94 :
95 4 : assert_se(f = path_join(original_dir, *p));
96 :
97 4 : assert_se(mkdir_parents(f, 0755) >= 0);
98 4 : assert_se(write_string_file(f, "file", WRITE_STRING_FILE_CREATE) == 0);
99 : }
100 :
101 3 : STRV_FOREACH_PAIR(link, p, links) {
102 2 : _cleanup_free_ char *f, *l;
103 :
104 2 : assert_se(f = path_join(original_dir, *p));
105 2 : assert_se(l = path_join(original_dir, *link));
106 :
107 2 : assert_se(mkdir_parents(l, 0755) >= 0);
108 2 : assert_se(symlink(f, l) == 0);
109 : }
110 :
111 5 : unixsockp = strjoina(original_dir, "unixsock");
112 1 : assert_se(mknod(unixsockp, S_IFSOCK|0644, 0) >= 0);
113 :
114 1 : assert_se(copy_tree(original_dir, copy_dir, UID_INVALID, GID_INVALID, COPY_REFLINK|COPY_MERGE) == 0);
115 :
116 5 : STRV_FOREACH(p, files) {
117 4 : _cleanup_free_ char *buf, *f;
118 : size_t sz;
119 :
120 4 : assert_se(f = path_join(copy_dir, *p));
121 :
122 4 : assert_se(access(f, F_OK) == 0);
123 4 : assert_se(read_full_file(f, &buf, &sz) == 0);
124 4 : assert_se(streq(buf, "file\n"));
125 : }
126 :
127 3 : STRV_FOREACH_PAIR(link, p, links) {
128 2 : _cleanup_free_ char *target, *f, *l;
129 :
130 2 : assert_se(f = strjoin(original_dir, *p));
131 2 : assert_se(l = strjoin(copy_dir, *link));
132 :
133 2 : assert_se(chase_symlinks(l, NULL, 0, &target) == 1);
134 2 : assert_se(path_equal(f, target));
135 : }
136 :
137 5 : unixsockp = strjoina(copy_dir, "unixsock");
138 1 : assert_se(stat(unixsockp, &st) >= 0);
139 1 : assert_se(S_ISSOCK(st.st_mode));
140 :
141 1 : assert_se(copy_tree(original_dir, copy_dir, UID_INVALID, GID_INVALID, COPY_REFLINK) < 0);
142 1 : assert_se(copy_tree("/tmp/inexistent/foo/bar/fsdoi", copy_dir, UID_INVALID, GID_INVALID, COPY_REFLINK) < 0);
143 :
144 1 : (void) rm_rf(copy_dir, REMOVE_ROOT|REMOVE_PHYSICAL);
145 1 : (void) rm_rf(original_dir, REMOVE_ROOT|REMOVE_PHYSICAL);
146 1 : }
147 :
148 1 : static void test_copy_bytes(void) {
149 1 : _cleanup_close_pair_ int pipefd[2] = {-1, -1};
150 1 : _cleanup_close_ int infd = -1;
151 : int r, r2;
152 : char buf[1024], buf2[1024];
153 :
154 1 : infd = open("/usr/lib/os-release", O_RDONLY|O_CLOEXEC);
155 1 : if (infd < 0)
156 0 : infd = open("/etc/os-release", O_RDONLY|O_CLOEXEC);
157 1 : assert_se(infd >= 0);
158 :
159 1 : assert_se(pipe2(pipefd, O_CLOEXEC) == 0);
160 :
161 1 : r = copy_bytes(infd, pipefd[1], (uint64_t) -1, 0);
162 1 : assert_se(r == 0);
163 :
164 1 : r = read(pipefd[0], buf, sizeof(buf));
165 1 : assert_se(r >= 0);
166 :
167 1 : assert_se(lseek(infd, 0, SEEK_SET) == 0);
168 1 : r2 = read(infd, buf2, sizeof(buf2));
169 1 : assert_se(r == r2);
170 :
171 1 : assert_se(strneq(buf, buf2, r));
172 :
173 : /* test copy_bytes with invalid descriptors */
174 1 : r = copy_bytes(pipefd[0], pipefd[0], 1, 0);
175 1 : assert_se(r == -EBADF);
176 :
177 1 : r = copy_bytes(pipefd[1], pipefd[1], 1, 0);
178 1 : assert_se(r == -EBADF);
179 :
180 1 : r = copy_bytes(pipefd[1], infd, 1, 0);
181 1 : assert_se(r == -EBADF);
182 1 : }
183 :
184 6 : static void test_copy_bytes_regular_file(const char *src, bool try_reflink, uint64_t max_bytes) {
185 6 : char fn2[] = "/tmp/test-copy-file-XXXXXX";
186 6 : char fn3[] = "/tmp/test-copy-file-XXXXXX";
187 6 : _cleanup_close_ int fd = -1, fd2 = -1, fd3 = -1;
188 : int r;
189 : struct stat buf, buf2, buf3;
190 :
191 6 : log_info("%s try_reflink=%s max_bytes=%" PRIu64, __func__, yes_no(try_reflink), max_bytes);
192 :
193 6 : fd = open(src, O_RDONLY | O_CLOEXEC | O_NOCTTY);
194 6 : assert_se(fd >= 0);
195 :
196 6 : fd2 = mkostemp_safe(fn2);
197 6 : assert_se(fd2 >= 0);
198 :
199 6 : fd3 = mkostemp_safe(fn3);
200 6 : assert_se(fd3 >= 0);
201 :
202 6 : r = copy_bytes(fd, fd2, max_bytes, try_reflink ? COPY_REFLINK : 0);
203 6 : if (max_bytes == (uint64_t) -1)
204 2 : assert_se(r == 0);
205 : else
206 4 : assert_se(IN_SET(r, 0, 1));
207 :
208 6 : assert_se(fstat(fd, &buf) == 0);
209 6 : assert_se(fstat(fd2, &buf2) == 0);
210 6 : assert_se((uint64_t) buf2.st_size == MIN((uint64_t) buf.st_size, max_bytes));
211 :
212 6 : if (max_bytes < (uint64_t) -1)
213 : /* Make sure the file is now higher than max_bytes */
214 4 : assert_se(ftruncate(fd2, max_bytes + 1) == 0);
215 :
216 6 : assert_se(lseek(fd2, 0, SEEK_SET) == 0);
217 :
218 6 : r = copy_bytes(fd2, fd3, max_bytes, try_reflink ? COPY_REFLINK : 0);
219 6 : if (max_bytes == (uint64_t) -1)
220 2 : assert_se(r == 0);
221 : else
222 : /* We cannot distinguish between the input being exactly max_bytes
223 : * or longer than max_bytes (without trying to read one more byte,
224 : * or calling stat, or FION_READ, etc, and we don't want to do any
225 : * of that). So we expect "truncation" since we know that file we
226 : * are copying is exactly max_bytes bytes. */
227 4 : assert_se(r == 1);
228 :
229 6 : assert_se(fstat(fd3, &buf3) == 0);
230 :
231 6 : if (max_bytes == (uint64_t) -1)
232 2 : assert_se(buf3.st_size == buf2.st_size);
233 : else
234 4 : assert_se((uint64_t) buf3.st_size == max_bytes);
235 :
236 6 : unlink(fn2);
237 6 : unlink(fn3);
238 6 : }
239 :
240 1 : static void test_copy_atomic(void) {
241 1 : _cleanup_(rm_rf_physical_and_freep) char *p = NULL;
242 : const char *q;
243 : int r;
244 :
245 1 : assert_se(mkdtemp_malloc(NULL, &p) >= 0);
246 :
247 5 : q = strjoina(p, "/fstab");
248 :
249 1 : r = copy_file_atomic("/etc/fstab", q, 0644, 0, 0, COPY_REFLINK);
250 1 : if (r == -ENOENT)
251 0 : return;
252 :
253 1 : assert_se(copy_file_atomic("/etc/fstab", q, 0644, 0, 0, COPY_REFLINK) == -EEXIST);
254 :
255 1 : assert_se(copy_file_atomic("/etc/fstab", q, 0644, 0, 0, COPY_REPLACE) >= 0);
256 : }
257 :
258 1 : int main(int argc, char *argv[]) {
259 1 : test_setup_logging(LOG_DEBUG);
260 :
261 1 : test_copy_file();
262 1 : test_copy_file_fd();
263 1 : test_copy_tree();
264 1 : test_copy_bytes();
265 1 : test_copy_bytes_regular_file(argv[0], false, (uint64_t) -1);
266 1 : test_copy_bytes_regular_file(argv[0], true, (uint64_t) -1);
267 1 : test_copy_bytes_regular_file(argv[0], false, 1000); /* smaller than copy buffer size */
268 1 : test_copy_bytes_regular_file(argv[0], true, 1000);
269 1 : test_copy_bytes_regular_file(argv[0], false, 32000); /* larger than copy buffer size */
270 1 : test_copy_bytes_regular_file(argv[0], true, 32000);
271 1 : test_copy_atomic();
272 :
273 1 : return 0;
274 : }
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