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641d1f99 RC |
1 | /*** |
2 | This file is part of systemd | |
3 | ||
4 | Copyright 2014 Ronny Chevalier | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU Lesser General Public License as published by | |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public License | |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
18 | ***/ | |
19 | ||
20 | #include <unistd.h> | |
21 | ||
b5efdb8a | 22 | #include "alloc-util.h" |
641d1f99 | 23 | #include "copy.h" |
3ffd4af2 | 24 | #include "fd-util.h" |
641d1f99 | 25 | #include "fileio.h" |
f4f15635 | 26 | #include "fs-util.h" |
ce33fdda | 27 | #include "log.h" |
07630cea | 28 | #include "macro.h" |
641d1f99 | 29 | #include "mkdir.h" |
07630cea LP |
30 | #include "path-util.h" |
31 | #include "rm-rf.h" | |
32 | #include "string-util.h" | |
641d1f99 | 33 | #include "strv.h" |
641d1f99 RC |
34 | #include "util.h" |
35 | ||
36 | static void test_copy_file(void) { | |
37 | _cleanup_free_ char *buf = NULL; | |
38 | char fn[] = "/tmp/test-copy_file.XXXXXX"; | |
39 | char fn_copy[] = "/tmp/test-copy_file.XXXXXX"; | |
40 | size_t sz = 0; | |
41 | int fd; | |
42 | ||
ce33fdda ZJS |
43 | log_info("%s", __func__); |
44 | ||
646853bd | 45 | fd = mkostemp_safe(fn); |
641d1f99 RC |
46 | assert_se(fd >= 0); |
47 | close(fd); | |
48 | ||
646853bd | 49 | fd = mkostemp_safe(fn_copy); |
641d1f99 RC |
50 | assert_se(fd >= 0); |
51 | close(fd); | |
52 | ||
4c1fc3e4 | 53 | assert_se(write_string_file(fn, "foo bar bar bar foo", WRITE_STRING_FILE_CREATE) == 0); |
641d1f99 | 54 | |
f2068bcc | 55 | assert_se(copy_file(fn, fn_copy, 0, 0644, 0) == 0); |
641d1f99 RC |
56 | |
57 | assert_se(read_full_file(fn_copy, &buf, &sz) == 0); | |
58 | assert_se(streq(buf, "foo bar bar bar foo\n")); | |
cda134ab | 59 | assert_se(sz == 20); |
641d1f99 RC |
60 | |
61 | unlink(fn); | |
62 | unlink(fn_copy); | |
63 | } | |
64 | ||
cda134ab LP |
65 | static void test_copy_file_fd(void) { |
66 | char in_fn[] = "/tmp/test-copy-file-fd-XXXXXX"; | |
67 | char out_fn[] = "/tmp/test-copy-file-fd-XXXXXX"; | |
68 | _cleanup_close_ int in_fd = -1, out_fd = -1; | |
69 | char text[] = "boohoo\nfoo\n\tbar\n"; | |
70 | char buf[64] = {0}; | |
71 | ||
ce33fdda ZJS |
72 | log_info("%s", __func__); |
73 | ||
646853bd | 74 | in_fd = mkostemp_safe(in_fn); |
cda134ab | 75 | assert_se(in_fd >= 0); |
646853bd | 76 | out_fd = mkostemp_safe(out_fn); |
cda134ab LP |
77 | assert_se(out_fd >= 0); |
78 | ||
4c1fc3e4 | 79 | assert_se(write_string_file(in_fn, text, WRITE_STRING_FILE_CREATE) == 0); |
7430ec6a LP |
80 | assert_se(copy_file_fd("/a/file/which/does/not/exist/i/guess", out_fd, true) < 0); |
81 | assert_se(copy_file_fd(in_fn, out_fd, true) >= 0); | |
cda134ab LP |
82 | assert_se(lseek(out_fd, SEEK_SET, 0) == 0); |
83 | ||
84 | assert_se(read(out_fd, buf, sizeof(buf)) == sizeof(text) - 1); | |
85 | assert_se(streq(buf, text)); | |
86 | ||
87 | unlink(in_fn); | |
88 | unlink(out_fn); | |
89 | } | |
90 | ||
641d1f99 RC |
91 | static void test_copy_tree(void) { |
92 | char original_dir[] = "/tmp/test-copy_tree/"; | |
93 | char copy_dir[] = "/tmp/test-copy_tree-copy/"; | |
94 | char **files = STRV_MAKE("file", "dir1/file", "dir1/dir2/file", "dir1/dir2/dir3/dir4/dir5/file"); | |
95 | char **links = STRV_MAKE("link", "file", | |
96 | "link2", "dir1/file"); | |
97 | char **p, **link; | |
0e2b2cac LP |
98 | const char *unixsockp; |
99 | struct stat st; | |
641d1f99 | 100 | |
ce33fdda ZJS |
101 | log_info("%s", __func__); |
102 | ||
c6878637 LP |
103 | (void) rm_rf(copy_dir, REMOVE_ROOT|REMOVE_PHYSICAL); |
104 | (void) rm_rf(original_dir, REMOVE_ROOT|REMOVE_PHYSICAL); | |
641d1f99 RC |
105 | |
106 | STRV_FOREACH(p, files) { | |
2397bc43 LP |
107 | _cleanup_free_ char *f; |
108 | ||
109 | assert_se(f = strappend(original_dir, *p)); | |
641d1f99 RC |
110 | |
111 | assert_se(mkdir_parents(f, 0755) >= 0); | |
4c1fc3e4 | 112 | assert_se(write_string_file(f, "file", WRITE_STRING_FILE_CREATE) == 0); |
641d1f99 RC |
113 | } |
114 | ||
115 | STRV_FOREACH_PAIR(link, p, links) { | |
2397bc43 LP |
116 | _cleanup_free_ char *f, *l; |
117 | ||
118 | assert_se(f = strappend(original_dir, *p)); | |
119 | assert_se(l = strappend(original_dir, *link)); | |
641d1f99 RC |
120 | |
121 | assert_se(mkdir_parents(l, 0755) >= 0); | |
122 | assert_se(symlink(f, l) == 0); | |
123 | } | |
124 | ||
0e2b2cac LP |
125 | unixsockp = strjoina(original_dir, "unixsock"); |
126 | assert_se(mknod(unixsockp, S_IFSOCK|0644, 0) >= 0); | |
127 | ||
641d1f99 RC |
128 | assert_se(copy_tree(original_dir, copy_dir, true) == 0); |
129 | ||
130 | STRV_FOREACH(p, files) { | |
2397bc43 | 131 | _cleanup_free_ char *buf = NULL, *f; |
641d1f99 | 132 | size_t sz = 0; |
2397bc43 LP |
133 | |
134 | assert_se(f = strappend(copy_dir, *p)); | |
641d1f99 RC |
135 | |
136 | assert_se(access(f, F_OK) == 0); | |
137 | assert_se(read_full_file(f, &buf, &sz) == 0); | |
138 | assert_se(streq(buf, "file\n")); | |
139 | } | |
140 | ||
141 | STRV_FOREACH_PAIR(link, p, links) { | |
2397bc43 LP |
142 | _cleanup_free_ char *target = NULL, *f, *l; |
143 | ||
605405c6 ZJS |
144 | assert_se(f = strjoin(original_dir, *p)); |
145 | assert_se(l = strjoin(copy_dir, *link)); | |
641d1f99 RC |
146 | |
147 | assert_se(readlink_and_canonicalize(l, &target) == 0); | |
148 | assert_se(path_equal(f, target)); | |
149 | } | |
150 | ||
0e2b2cac LP |
151 | unixsockp = strjoina(copy_dir, "unixsock"); |
152 | assert_se(stat(unixsockp, &st) >= 0); | |
153 | assert_se(S_ISSOCK(st.st_mode)); | |
154 | ||
641d1f99 RC |
155 | assert_se(copy_tree(original_dir, copy_dir, false) < 0); |
156 | assert_se(copy_tree("/tmp/inexistent/foo/bar/fsdoi", copy_dir, false) < 0); | |
157 | ||
c6878637 LP |
158 | (void) rm_rf(copy_dir, REMOVE_ROOT|REMOVE_PHYSICAL); |
159 | (void) rm_rf(original_dir, REMOVE_ROOT|REMOVE_PHYSICAL); | |
641d1f99 RC |
160 | } |
161 | ||
ad5ecc11 ZJS |
162 | static void test_copy_bytes(void) { |
163 | _cleanup_close_pair_ int pipefd[2] = {-1, -1}; | |
164 | _cleanup_close_ int infd = -1; | |
165 | int r, r2; | |
166 | char buf[1024], buf2[1024]; | |
167 | ||
4f36d400 DJL |
168 | infd = open("/usr/lib/os-release", O_RDONLY|O_CLOEXEC); |
169 | if (infd < 0) | |
170 | infd = open("/etc/os-release", O_RDONLY|O_CLOEXEC); | |
ad5ecc11 ZJS |
171 | assert_se(infd >= 0); |
172 | ||
173 | assert_se(pipe2(pipefd, O_CLOEXEC) == 0); | |
174 | ||
59f448cf | 175 | r = copy_bytes(infd, pipefd[1], (uint64_t) -1, false); |
ad5ecc11 ZJS |
176 | assert_se(r == 0); |
177 | ||
178 | r = read(pipefd[0], buf, sizeof(buf)); | |
179 | assert_se(r >= 0); | |
180 | ||
181 | assert_se(lseek(infd, 0, SEEK_SET) == 0); | |
182 | r2 = read(infd, buf2, sizeof(buf2)); | |
183 | assert_se(r == r2); | |
184 | ||
185 | assert_se(strneq(buf, buf2, r)); | |
186 | ||
187 | /* test copy_bytes with invalid descriptors */ | |
188 | r = copy_bytes(pipefd[0], pipefd[0], 1, false); | |
189 | assert_se(r == -EBADF); | |
190 | ||
191 | r = copy_bytes(pipefd[1], pipefd[1], 1, false); | |
192 | assert_se(r == -EBADF); | |
193 | ||
194 | r = copy_bytes(pipefd[1], infd, 1, false); | |
195 | assert_se(r == -EBADF); | |
196 | } | |
197 | ||
fa13cf9e | 198 | static void test_copy_bytes_regular_file(const char *src, bool try_reflink, uint64_t max_bytes) { |
ce33fdda ZJS |
199 | char fn2[] = "/tmp/test-copy-file-XXXXXX"; |
200 | char fn3[] = "/tmp/test-copy-file-XXXXXX"; | |
201 | _cleanup_close_ int fd = -1, fd2 = -1, fd3 = -1; | |
202 | int r; | |
203 | struct stat buf, buf2, buf3; | |
204 | ||
fa13cf9e | 205 | log_info("%s try_reflink=%s max_bytes=%" PRIu64, __func__, yes_no(try_reflink), max_bytes); |
ce33fdda ZJS |
206 | |
207 | fd = open(src, O_RDONLY | O_CLOEXEC | O_NOCTTY); | |
208 | assert_se(fd >= 0); | |
209 | ||
646853bd | 210 | fd2 = mkostemp_safe(fn2); |
ce33fdda ZJS |
211 | assert_se(fd2 >= 0); |
212 | ||
646853bd | 213 | fd3 = mkostemp_safe(fn3); |
ce33fdda ZJS |
214 | assert_se(fd3 >= 0); |
215 | ||
7a827fcb ZJS |
216 | r = copy_bytes(fd, fd2, max_bytes, try_reflink); |
217 | if (max_bytes == (uint64_t) -1) | |
218 | assert_se(r == 0); | |
219 | else | |
220 | assert_se(IN_SET(r, 0, 1)); | |
ce33fdda ZJS |
221 | |
222 | assert_se(lseek(fd2, 0, SEEK_SET) == 0); | |
223 | ||
7a827fcb ZJS |
224 | r = copy_bytes(fd2, fd3, max_bytes, try_reflink); |
225 | if (max_bytes == (uint64_t) -1) | |
226 | assert_se(r == 0); | |
227 | else | |
228 | /* We cannot distinguish between the input being exactly max_bytes | |
229 | * or longer than max_bytes (without trying to read one more byte, | |
230 | * or calling stat, or FION_READ, etc, and we don't want to do any | |
231 | * of that). So we expect "truncation" since we know that file we | |
232 | * are copying is exactly max_bytes bytes. */ | |
233 | assert_se(r == 1); | |
ce33fdda ZJS |
234 | |
235 | assert_se(fstat(fd, &buf) == 0); | |
236 | assert_se(fstat(fd2, &buf2) == 0); | |
237 | assert_se(fstat(fd3, &buf3) == 0); | |
238 | ||
fa13cf9e | 239 | assert_se((uint64_t) buf2.st_size == MIN((uint64_t) buf.st_size, max_bytes)); |
7a827fcb | 240 | assert_se(buf3.st_size == buf2.st_size); |
ce33fdda ZJS |
241 | |
242 | unlink(fn2); | |
243 | unlink(fn3); | |
244 | } | |
245 | ||
641d1f99 RC |
246 | int main(int argc, char *argv[]) { |
247 | test_copy_file(); | |
cda134ab | 248 | test_copy_file_fd(); |
641d1f99 | 249 | test_copy_tree(); |
ad5ecc11 | 250 | test_copy_bytes(); |
7a827fcb ZJS |
251 | test_copy_bytes_regular_file(argv[0], false, (uint64_t) -1); |
252 | test_copy_bytes_regular_file(argv[0], true, (uint64_t) -1); | |
253 | test_copy_bytes_regular_file(argv[0], false, 1000); /* smaller than copy buffer size */ | |
254 | test_copy_bytes_regular_file(argv[0], true, 1000); | |
255 | test_copy_bytes_regular_file(argv[0], false, 32000); /* larger than copy buffer size */ | |
256 | test_copy_bytes_regular_file(argv[0], true, 32000); | |
641d1f99 RC |
257 | |
258 | return 0; | |
259 | } |