1 /*
2 * Extracted fronm glob.c
3 */
4
5 #include <linux/module.h>
6 #include <linux/moduleparam.h>
7 #include <linux/glob.h>
8 #include <linux/printk.h>
9
10 /* Boot with "glob.verbose=1" to show successful tests, too */
11 static bool verbose = false;
12 module_param(verbose, bool, 0);
13
14 struct glob_test {
15 char const *pat, *str;
16 bool expected;
17 };
18
test(char const * pat,char const * str,bool expected)19 static bool __pure __init test(char const *pat, char const *str, bool expected)
20 {
21 bool match = glob_match(pat, str);
22 bool success = match == expected;
23
24 /* Can't get string literals into a particular section, so... */
25 static char const msg_error[] __initconst =
26 KERN_ERR "glob: \"%s\" vs. \"%s\": %s *** ERROR ***\n";
27 static char const msg_ok[] __initconst =
28 KERN_DEBUG "glob: \"%s\" vs. \"%s\": %s OK\n";
29 static char const mismatch[] __initconst = "mismatch";
30 char const *message;
31
32 if (!success)
33 message = msg_error;
34 else if (verbose)
35 message = msg_ok;
36 else
37 return success;
38
39 printk(message, pat, str, mismatch + 3*match);
40 return success;
41 }
42
43 /*
44 * The tests are all jammed together in one array to make it simpler
45 * to place that array in the .init.rodata section. The obvious
46 * "array of structures containing char *" has no way to force the
47 * pointed-to strings to be in a particular section.
48 *
49 * Anyway, a test consists of:
50 * 1. Expected glob_match result: '1' or '0'.
51 * 2. Pattern to match: null-terminated string
52 * 3. String to match against: null-terminated string
53 *
54 * The list of tests is terminated with a final '\0' instead of
55 * a glob_match result character.
56 */
57 static char const glob_tests[] __initconst =
58 /* Some basic tests */
59 "1" "a\0" "a\0"
60 "0" "a\0" "b\0"
61 "0" "a\0" "aa\0"
62 "0" "a\0" "\0"
63 "1" "\0" "\0"
64 "0" "\0" "a\0"
65 /* Simple character class tests */
66 "1" "[a]\0" "a\0"
67 "0" "[a]\0" "b\0"
68 "0" "[!a]\0" "a\0"
69 "1" "[!a]\0" "b\0"
70 "1" "[ab]\0" "a\0"
71 "1" "[ab]\0" "b\0"
72 "0" "[ab]\0" "c\0"
73 "1" "[!ab]\0" "c\0"
74 "1" "[a-c]\0" "b\0"
75 "0" "[a-c]\0" "d\0"
76 /* Corner cases in character class parsing */
77 "1" "[a-c-e-g]\0" "-\0"
78 "0" "[a-c-e-g]\0" "d\0"
79 "1" "[a-c-e-g]\0" "f\0"
80 "1" "[]a-ceg-ik[]\0" "a\0"
81 "1" "[]a-ceg-ik[]\0" "]\0"
82 "1" "[]a-ceg-ik[]\0" "[\0"
83 "1" "[]a-ceg-ik[]\0" "h\0"
84 "0" "[]a-ceg-ik[]\0" "f\0"
85 "0" "[!]a-ceg-ik[]\0" "h\0"
86 "0" "[!]a-ceg-ik[]\0" "]\0"
87 "1" "[!]a-ceg-ik[]\0" "f\0"
88 /* Simple wild cards */
89 "1" "?\0" "a\0"
90 "0" "?\0" "aa\0"
91 "0" "??\0" "a\0"
92 "1" "?x?\0" "axb\0"
93 "0" "?x?\0" "abx\0"
94 "0" "?x?\0" "xab\0"
95 /* Asterisk wild cards (backtracking) */
96 "0" "*??\0" "a\0"
97 "1" "*??\0" "ab\0"
98 "1" "*??\0" "abc\0"
99 "1" "*??\0" "abcd\0"
100 "0" "??*\0" "a\0"
101 "1" "??*\0" "ab\0"
102 "1" "??*\0" "abc\0"
103 "1" "??*\0" "abcd\0"
104 "0" "?*?\0" "a\0"
105 "1" "?*?\0" "ab\0"
106 "1" "?*?\0" "abc\0"
107 "1" "?*?\0" "abcd\0"
108 "1" "*b\0" "b\0"
109 "1" "*b\0" "ab\0"
110 "0" "*b\0" "ba\0"
111 "1" "*b\0" "bb\0"
112 "1" "*b\0" "abb\0"
113 "1" "*b\0" "bab\0"
114 "1" "*bc\0" "abbc\0"
115 "1" "*bc\0" "bc\0"
116 "1" "*bc\0" "bbc\0"
117 "1" "*bc\0" "bcbc\0"
118 /* Multiple asterisks (complex backtracking) */
119 "1" "*ac*\0" "abacadaeafag\0"
120 "1" "*ac*ae*ag*\0" "abacadaeafag\0"
121 "1" "*a*b*[bc]*[ef]*g*\0" "abacadaeafag\0"
122 "0" "*a*b*[ef]*[cd]*g*\0" "abacadaeafag\0"
123 "1" "*abcd*\0" "abcabcabcabcdefg\0"
124 "1" "*ab*cd*\0" "abcabcabcabcdefg\0"
125 "1" "*abcd*abcdef*\0" "abcabcdabcdeabcdefg\0"
126 "0" "*abcd*\0" "abcabcabcabcefg\0"
127 "0" "*ab*cd*\0" "abcabcabcabcefg\0";
128
glob_init(void)129 static int __init glob_init(void)
130 {
131 unsigned successes = 0;
132 unsigned n = 0;
133 char const *p = glob_tests;
134 static char const message[] __initconst =
135 KERN_INFO "glob: %u self-tests passed, %u failed\n";
136
137 /*
138 * Tests are jammed together in a string. The first byte is '1'
139 * or '0' to indicate the expected outcome, or '\0' to indicate the
140 * end of the tests. Then come two null-terminated strings: the
141 * pattern and the string to match it against.
142 */
143 while (*p) {
144 bool expected = *p++ & 1;
145 char const *pat = p;
146
147 p += strlen(p) + 1;
148 successes += test(pat, p, expected);
149 p += strlen(p) + 1;
150 n++;
151 }
152
153 n -= successes;
154 printk(message, successes, n);
155
156 /* What's the errno for "kernel bug detected"? Guess... */
157 return n ? -ECANCELED : 0;
158 }
159
160 /* We need a dummy exit function to allow unload */
glob_fini(void)161 static void __exit glob_fini(void) { }
162
163 module_init(glob_init);
164 module_exit(glob_fini);
165
166 MODULE_DESCRIPTION("glob(7) matching tests");
167 MODULE_LICENSE("Dual MIT/GPL");
168