1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) 2020 Viresh Kumar <viresh.kumar@linaro.org>
4 *
5 * openat2() tests with various resolve flags.
6 */
7 #include "tst_test.h"
8 #include "lapi/openat2.h"
9
10 #define FOO_SYMLINK "foo_symlink"
11
12 static struct open_how *how;
13
14 static struct tcase {
15 const char *name;
16 const char *pathname;
17 uint64_t resolve;
18 int exp_errno;
19 } tcases[] = {
20 /* Success cases */
21 {"open /proc/version", "/proc/version", 0, 0},
22 {"open magiclinks", "/proc/self/exe", 0, 0},
23 {"open symlinks", FOO_SYMLINK, 0, 0},
24
25 /* Failure cases */
26 {"resolve-no-xdev", "/proc/version", RESOLVE_NO_XDEV, EXDEV},
27 {"resolve-no-magiclinks", "/proc/self/exe", RESOLVE_NO_MAGICLINKS, ELOOP},
28 {"resolve-no-symlinks", FOO_SYMLINK, RESOLVE_NO_SYMLINKS, ELOOP},
29 {"resolve-beneath", "/proc/version", RESOLVE_BENEATH, EXDEV},
30 {"resolve-beneath", "../foo", RESOLVE_BENEATH, EXDEV},
31 {"resolve-no-in-root", "/proc/version", RESOLVE_IN_ROOT, ENOENT},
32 };
33
setup(void)34 static void setup(void)
35 {
36 openat2_supported_by_kernel();
37 SAFE_SYMLINK("/proc/version", FOO_SYMLINK);
38 }
39
run(unsigned int n)40 static void run(unsigned int n)
41 {
42 struct tcase *tc = &tcases[n];
43
44 how->flags = O_RDONLY | O_CREAT;
45 how->mode = S_IRUSR;
46 how->resolve = tc->resolve;
47
48 TEST(openat2(AT_FDCWD, tc->pathname, how, sizeof(*how)));
49
50 if (!tc->exp_errno) {
51 if (TST_RET < 0) {
52 tst_res(TFAIL | TTERRNO, "%s: openat2() failed",
53 tc->name);
54 return;
55 }
56
57 SAFE_CLOSE(TST_RET);
58 tst_res(TPASS, "%s: openat2() passed", tc->name);
59 } else {
60 if (TST_RET >= 0) {
61 SAFE_CLOSE(TST_RET);
62 tst_res(TFAIL, "%s: openat2() passed unexpectedly",
63 tc->name);
64 return;
65 }
66
67 if (tc->exp_errno != TST_ERR) {
68 tst_res(TFAIL | TTERRNO, "%s: openat2() should fail with %s",
69 tc->name, tst_strerrno(tc->exp_errno));
70 return;
71 }
72
73 tst_res(TPASS | TTERRNO, "%s: openat2() failed as expected",
74 tc->name);
75 }
76 }
77
78 static struct tst_test test = {
79 .tcnt = ARRAY_SIZE(tcases),
80 .test = run,
81 .setup = setup,
82 .needs_tmpdir = 1,
83 .bufs = (struct tst_buffers []) {
84 {&how, .size = sizeof(*how)},
85 {},
86 }
87 };
88