1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
2
3 #include <fcntl.h>
4 #include <linux/magic.h>
5 #include <sched.h>
6 #include <unistd.h>
7
8 #include "alloc-util.h"
9 #include "errno-list.h"
10 #include "fd-util.h"
11 #include "fs-util.h"
12 #include "macro.h"
13 #include "mountpoint-util.h"
14 #include "namespace-util.h"
15 #include "path-util.h"
16 #include "rm-rf.h"
17 #include "stat-util.h"
18 #include "tests.h"
19 #include "tmpfile-util.h"
20
TEST(null_or_empty_path)21 TEST(null_or_empty_path) {
22 assert_se(null_or_empty_path("/dev/null") == 1);
23 assert_se(null_or_empty_path("/dev/tty") == 1); /* We assume that any character device is "empty", bleh. */
24 assert_se(null_or_empty_path("../../../../../../../../../../../../../../../../../../../../dev/null") == 1);
25 assert_se(null_or_empty_path("/proc/self/exe") == 0);
26 assert_se(null_or_empty_path("/nosuchfileordir") == -ENOENT);
27 }
28
TEST(null_or_empty_path_with_root)29 TEST(null_or_empty_path_with_root) {
30 assert_se(null_or_empty_path_with_root("/dev/null", NULL) == 1);
31 assert_se(null_or_empty_path_with_root("/dev/null", "/") == 1);
32 assert_se(null_or_empty_path_with_root("/dev/null", "/.././../") == 1);
33 assert_se(null_or_empty_path_with_root("/dev/null", "/.././..") == 1);
34 assert_se(null_or_empty_path_with_root("../../../../../../../../../../../../../../../../../../../../dev/null", NULL) == 1);
35 assert_se(null_or_empty_path_with_root("../../../../../../../../../../../../../../../../../../../../dev/null", "/") == 1);
36 assert_se(null_or_empty_path_with_root("/proc/self/exe", NULL) == 0);
37 assert_se(null_or_empty_path_with_root("/proc/self/exe", "/") == 0);
38 assert_se(null_or_empty_path_with_root("/nosuchfileordir", NULL) == -ENOENT);
39 assert_se(null_or_empty_path_with_root("/nosuchfileordir", "/.././../") == -ENOENT);
40 assert_se(null_or_empty_path_with_root("/nosuchfileordir", "/.././..") == -ENOENT);
41 assert_se(null_or_empty_path_with_root("/foobar/barbar/dev/null", "/foobar/barbar") == 1);
42 assert_se(null_or_empty_path_with_root("/foobar/barbar/dev/null", "/foobar/barbar/") == 1);
43 }
44
TEST(files_same)45 TEST(files_same) {
46 _cleanup_close_ int fd = -1;
47 char name[] = "/tmp/test-files_same.XXXXXX";
48 char name_alias[] = "/tmp/test-files_same.alias";
49
50 fd = mkostemp_safe(name);
51 assert_se(fd >= 0);
52 assert_se(symlink(name, name_alias) >= 0);
53
54 assert_se(files_same(name, name, 0));
55 assert_se(files_same(name, name, AT_SYMLINK_NOFOLLOW));
56 assert_se(files_same(name, name_alias, 0));
57 assert_se(!files_same(name, name_alias, AT_SYMLINK_NOFOLLOW));
58
59 unlink(name);
60 unlink(name_alias);
61 }
62
TEST(is_symlink)63 TEST(is_symlink) {
64 char name[] = "/tmp/test-is_symlink.XXXXXX";
65 char name_link[] = "/tmp/test-is_symlink.link";
66 _cleanup_close_ int fd = -1;
67
68 fd = mkostemp_safe(name);
69 assert_se(fd >= 0);
70 assert_se(symlink(name, name_link) >= 0);
71
72 assert_se(is_symlink(name) == 0);
73 assert_se(is_symlink(name_link) == 1);
74 assert_se(is_symlink("/a/file/which/does/not/exist/i/guess") < 0);
75
76 unlink(name);
77 unlink(name_link);
78 }
79
TEST(path_is_fs_type)80 TEST(path_is_fs_type) {
81 /* run might not be a mount point in build chroots */
82 if (path_is_mount_point("/run", NULL, AT_SYMLINK_FOLLOW) > 0) {
83 assert_se(path_is_fs_type("/run", TMPFS_MAGIC) > 0);
84 assert_se(path_is_fs_type("/run", BTRFS_SUPER_MAGIC) == 0);
85 }
86 if (path_is_mount_point("/proc", NULL, AT_SYMLINK_FOLLOW) > 0) {
87 assert_se(path_is_fs_type("/proc", PROC_SUPER_MAGIC) > 0);
88 assert_se(path_is_fs_type("/proc", BTRFS_SUPER_MAGIC) == 0);
89 }
90 assert_se(path_is_fs_type("/i-dont-exist", BTRFS_SUPER_MAGIC) == -ENOENT);
91 }
92
TEST(path_is_temporary_fs)93 TEST(path_is_temporary_fs) {
94 int r;
95
96 FOREACH_STRING(s, "/", "/run", "/sys", "/sys/", "/proc", "/i-dont-exist", "/var", "/var/lib") {
97 r = path_is_temporary_fs(s);
98
99 log_info_errno(r, "path_is_temporary_fs(\"%s\"): %d, %s",
100 s, r, r < 0 ? errno_to_name(r) : yes_no(r));
101 }
102
103 /* run might not be a mount point in build chroots */
104 if (path_is_mount_point("/run", NULL, AT_SYMLINK_FOLLOW) > 0)
105 assert_se(path_is_temporary_fs("/run") > 0);
106 assert_se(path_is_temporary_fs("/proc") == 0);
107 assert_se(path_is_temporary_fs("/i-dont-exist") == -ENOENT);
108 }
109
TEST(path_is_read_only_fs)110 TEST(path_is_read_only_fs) {
111 int r;
112
113 FOREACH_STRING(s, "/", "/run", "/sys", "/sys/", "/proc", "/i-dont-exist", "/var", "/var/lib") {
114 r = path_is_read_only_fs(s);
115
116 log_info_errno(r, "path_is_read_only_fs(\"%s\"): %d, %s",
117 s, r, r < 0 ? errno_to_name(r) : yes_no(r));
118 }
119
120 if (path_is_mount_point("/sys", NULL, AT_SYMLINK_FOLLOW) > 0)
121 assert_se(IN_SET(path_is_read_only_fs("/sys"), 0, 1));
122
123 assert_se(path_is_read_only_fs("/proc") == 0);
124 assert_se(path_is_read_only_fs("/i-dont-exist") == -ENOENT);
125 }
126
TEST(fd_is_ns)127 TEST(fd_is_ns) {
128 _cleanup_close_ int fd = -1;
129
130 assert_se(fd_is_ns(STDIN_FILENO, CLONE_NEWNET) == 0);
131 assert_se(fd_is_ns(STDERR_FILENO, CLONE_NEWNET) == 0);
132 assert_se(fd_is_ns(STDOUT_FILENO, CLONE_NEWNET) == 0);
133
134 fd = open("/proc/self/ns/mnt", O_CLOEXEC|O_RDONLY);
135 if (fd < 0) {
136 assert_se(errno == ENOENT);
137 log_notice("Path %s not found, skipping test", "/proc/self/ns/mnt");
138 return;
139 }
140 assert_se(fd >= 0);
141 assert_se(IN_SET(fd_is_ns(fd, CLONE_NEWNET), 0, -EUCLEAN));
142 fd = safe_close(fd);
143
144 assert_se((fd = open("/proc/self/ns/ipc", O_CLOEXEC|O_RDONLY)) >= 0);
145 assert_se(IN_SET(fd_is_ns(fd, CLONE_NEWIPC), 1, -EUCLEAN));
146 fd = safe_close(fd);
147
148 assert_se((fd = open("/proc/self/ns/net", O_CLOEXEC|O_RDONLY)) >= 0);
149 assert_se(IN_SET(fd_is_ns(fd, CLONE_NEWNET), 1, -EUCLEAN));
150 }
151
TEST(dir_is_empty)152 TEST(dir_is_empty) {
153 _cleanup_(rm_rf_physical_and_freep) char *empty_dir = NULL;
154 _cleanup_free_ char *j = NULL, *jj = NULL, *jjj = NULL;
155
156 assert_se(dir_is_empty_at(AT_FDCWD, "/proc", /* ignore_hidden_or_backup= */ true) == 0);
157 assert_se(dir_is_empty_at(AT_FDCWD, "/icertainlydontexistdoi", /* ignore_hidden_or_backup= */ true) == -ENOENT);
158
159 assert_se(mkdtemp_malloc("/tmp/emptyXXXXXX", &empty_dir) >= 0);
160 assert_se(dir_is_empty_at(AT_FDCWD, empty_dir, /* ignore_hidden_or_backup= */ true) > 0);
161
162 j = path_join(empty_dir, "zzz");
163 assert_se(j);
164 assert_se(touch(j) >= 0);
165
166 assert_se(dir_is_empty_at(AT_FDCWD, empty_dir, /* ignore_hidden_or_backup= */ true) == 0);
167
168 jj = path_join(empty_dir, "ppp");
169 assert_se(jj);
170 assert_se(touch(jj) >= 0);
171
172 jjj = path_join(empty_dir, ".qqq");
173 assert_se(jjj);
174 assert_se(touch(jjj) >= 0);
175
176 assert_se(dir_is_empty_at(AT_FDCWD, empty_dir, /* ignore_hidden_or_backup= */ true) == 0);
177 assert_se(dir_is_empty_at(AT_FDCWD, empty_dir, /* ignore_hidden_or_backup= */ false) == 0);
178 assert_se(unlink(j) >= 0);
179 assert_se(dir_is_empty_at(AT_FDCWD, empty_dir, /* ignore_hidden_or_backup= */ true) == 0);
180 assert_se(dir_is_empty_at(AT_FDCWD, empty_dir, /* ignore_hidden_or_backup= */ false) == 0);
181 assert_se(unlink(jj) >= 0);
182 assert_se(dir_is_empty_at(AT_FDCWD, empty_dir, /* ignore_hidden_or_backup= */ true) > 0);
183 assert_se(dir_is_empty_at(AT_FDCWD, empty_dir, /* ignore_hidden_or_backup= */ false) == 0);
184 assert_se(unlink(jjj) >= 0);
185 assert_se(dir_is_empty_at(AT_FDCWD, empty_dir, /* ignore_hidden_or_backup= */ true) > 0);
186 assert_se(dir_is_empty_at(AT_FDCWD, empty_dir, /* ignore_hidden_or_backup= */ false) > 0);
187 }
188
intro(void)189 static int intro(void) {
190 log_show_color(true);
191 return EXIT_SUCCESS;
192 }
193
194 DEFINE_TEST_MAIN_WITH_INTRO(LOG_INFO, intro);
195