Commit | Line | Data |
---|---|---|
16c7fa05 AS |
1 | /* |
2 | * Test cases for lib/string_helpers.c module. | |
3 | */ | |
4 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
5 | ||
6 | #include <linux/init.h> | |
7 | #include <linux/kernel.h> | |
8 | #include <linux/module.h> | |
9 | #include <linux/random.h> | |
10 | #include <linux/string.h> | |
11 | #include <linux/string_helpers.h> | |
12 | ||
13 | struct test_string { | |
14 | const char *in; | |
15 | const char *out; | |
16 | unsigned int flags; | |
17 | }; | |
18 | ||
19 | static const struct test_string strings[] __initconst = { | |
20 | { | |
21 | .in = "\\f\\ \\n\\r\\t\\v", | |
22 | .out = "\f\\ \n\r\t\v", | |
23 | .flags = UNESCAPE_SPACE, | |
24 | }, | |
25 | { | |
26 | .in = "\\40\\1\\387\\0064\\05\\040\\8a\\110\\777", | |
27 | .out = " \001\00387\0064\005 \\8aH?7", | |
28 | .flags = UNESCAPE_OCTAL, | |
29 | }, | |
30 | { | |
31 | .in = "\\xv\\xa\\x2c\\xD\\x6f2", | |
32 | .out = "\\xv\n,\ro2", | |
33 | .flags = UNESCAPE_HEX, | |
34 | }, | |
35 | { | |
36 | .in = "\\h\\\\\\\"\\a\\e\\", | |
37 | .out = "\\h\\\"\a\e\\", | |
38 | .flags = UNESCAPE_SPECIAL, | |
39 | }, | |
40 | }; | |
41 | ||
42 | static void __init test_string_unescape(unsigned int flags, bool inplace) | |
43 | { | |
44 | char in[256]; | |
45 | char out_test[256]; | |
46 | char out_real[256]; | |
47 | int i, p = 0, q_test = 0, q_real = sizeof(out_real); | |
48 | ||
49 | for (i = 0; i < ARRAY_SIZE(strings); i++) { | |
50 | const char *s = strings[i].in; | |
51 | int len = strlen(strings[i].in); | |
52 | ||
53 | /* Copy string to in buffer */ | |
54 | memcpy(&in[p], s, len); | |
55 | p += len; | |
56 | ||
57 | /* Copy expected result for given flags */ | |
58 | if (flags & strings[i].flags) { | |
59 | s = strings[i].out; | |
60 | len = strlen(strings[i].out); | |
61 | } | |
62 | memcpy(&out_test[q_test], s, len); | |
63 | q_test += len; | |
64 | } | |
65 | in[p++] = '\0'; | |
66 | ||
67 | /* Call string_unescape and compare result */ | |
68 | if (inplace) { | |
69 | memcpy(out_real, in, p); | |
70 | if (flags == UNESCAPE_ANY) | |
71 | q_real = string_unescape_any_inplace(out_real); | |
72 | else | |
73 | q_real = string_unescape_inplace(out_real, flags); | |
74 | } else if (flags == UNESCAPE_ANY) { | |
75 | q_real = string_unescape_any(in, out_real, q_real); | |
76 | } else { | |
77 | q_real = string_unescape(in, out_real, q_real, flags); | |
78 | } | |
79 | ||
80 | if (q_real != q_test || memcmp(out_test, out_real, q_test)) { | |
81 | pr_warn("Test failed: flags = %u\n", flags); | |
82 | print_hex_dump(KERN_WARNING, "Input: ", | |
83 | DUMP_PREFIX_NONE, 16, 1, in, p - 1, true); | |
84 | print_hex_dump(KERN_WARNING, "Expected: ", | |
85 | DUMP_PREFIX_NONE, 16, 1, out_test, q_test, true); | |
86 | print_hex_dump(KERN_WARNING, "Got: ", | |
87 | DUMP_PREFIX_NONE, 16, 1, out_real, q_real, true); | |
88 | } | |
89 | } | |
90 | ||
91 | static int __init test_string_helpers_init(void) | |
92 | { | |
93 | unsigned int i; | |
94 | ||
95 | pr_info("Running tests...\n"); | |
96 | for (i = 0; i < UNESCAPE_ANY + 1; i++) | |
97 | test_string_unescape(i, false); | |
98 | test_string_unescape(get_random_int() % (UNESCAPE_ANY + 1), true); | |
99 | ||
100 | return -EINVAL; | |
101 | } | |
102 | module_init(test_string_helpers_init); | |
103 | MODULE_LICENSE("Dual BSD/GPL"); |