168 lines
4.2 KiB
C
168 lines
4.2 KiB
C
/*
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* Extracted fronm glob.c
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*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/glob.h>
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#include <linux/printk.h>
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/* Boot with "glob.verbose=1" to show successful tests, too */
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static bool verbose = false;
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module_param(verbose, bool, 0);
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struct glob_test {
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char const *pat, *str;
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bool expected;
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};
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static bool __pure __init test(char const *pat, char const *str, bool expected)
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{
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bool match = glob_match(pat, str);
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bool success = match == expected;
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/* Can't get string literals into a particular section, so... */
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static char const msg_error[] __initconst =
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KERN_ERR "glob: \"%s\" vs. \"%s\": %s *** ERROR ***\n";
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static char const msg_ok[] __initconst =
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KERN_DEBUG "glob: \"%s\" vs. \"%s\": %s OK\n";
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static char const mismatch[] __initconst = "mismatch";
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char const *message;
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if (!success)
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message = msg_error;
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else if (verbose)
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message = msg_ok;
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else
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return success;
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printk(message, pat, str, mismatch + 3*match);
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return success;
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}
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/*
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* The tests are all jammed together in one array to make it simpler
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* to place that array in the .init.rodata section. The obvious
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* "array of structures containing char *" has no way to force the
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* pointed-to strings to be in a particular section.
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*
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* Anyway, a test consists of:
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* 1. Expected glob_match result: '1' or '0'.
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* 2. Pattern to match: null-terminated string
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* 3. String to match against: null-terminated string
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*
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* The list of tests is terminated with a final '\0' instead of
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* a glob_match result character.
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*/
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static char const glob_tests[] __initconst =
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/* Some basic tests */
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"1" "a\0" "a\0"
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"0" "a\0" "b\0"
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"0" "a\0" "aa\0"
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"0" "a\0" "\0"
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"1" "\0" "\0"
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"0" "\0" "a\0"
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/* Simple character class tests */
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"1" "[a]\0" "a\0"
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"0" "[a]\0" "b\0"
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"0" "[!a]\0" "a\0"
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"1" "[!a]\0" "b\0"
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"1" "[ab]\0" "a\0"
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"1" "[ab]\0" "b\0"
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"0" "[ab]\0" "c\0"
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"1" "[!ab]\0" "c\0"
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"1" "[a-c]\0" "b\0"
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"0" "[a-c]\0" "d\0"
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/* Corner cases in character class parsing */
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"1" "[a-c-e-g]\0" "-\0"
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"0" "[a-c-e-g]\0" "d\0"
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"1" "[a-c-e-g]\0" "f\0"
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"1" "[]a-ceg-ik[]\0" "a\0"
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"1" "[]a-ceg-ik[]\0" "]\0"
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"1" "[]a-ceg-ik[]\0" "[\0"
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"1" "[]a-ceg-ik[]\0" "h\0"
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"0" "[]a-ceg-ik[]\0" "f\0"
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"0" "[!]a-ceg-ik[]\0" "h\0"
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"0" "[!]a-ceg-ik[]\0" "]\0"
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"1" "[!]a-ceg-ik[]\0" "f\0"
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/* Simple wild cards */
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"1" "?\0" "a\0"
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"0" "?\0" "aa\0"
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"0" "??\0" "a\0"
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"1" "?x?\0" "axb\0"
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"0" "?x?\0" "abx\0"
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"0" "?x?\0" "xab\0"
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/* Asterisk wild cards (backtracking) */
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"0" "*??\0" "a\0"
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"1" "*??\0" "ab\0"
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"1" "*??\0" "abc\0"
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"1" "*??\0" "abcd\0"
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"0" "??*\0" "a\0"
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"1" "??*\0" "ab\0"
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"1" "??*\0" "abc\0"
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"1" "??*\0" "abcd\0"
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"0" "?*?\0" "a\0"
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"1" "?*?\0" "ab\0"
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"1" "?*?\0" "abc\0"
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"1" "?*?\0" "abcd\0"
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"1" "*b\0" "b\0"
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"1" "*b\0" "ab\0"
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"0" "*b\0" "ba\0"
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"1" "*b\0" "bb\0"
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"1" "*b\0" "abb\0"
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"1" "*b\0" "bab\0"
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"1" "*bc\0" "abbc\0"
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"1" "*bc\0" "bc\0"
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"1" "*bc\0" "bbc\0"
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"1" "*bc\0" "bcbc\0"
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/* Multiple asterisks (complex backtracking) */
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"1" "*ac*\0" "abacadaeafag\0"
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"1" "*ac*ae*ag*\0" "abacadaeafag\0"
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"1" "*a*b*[bc]*[ef]*g*\0" "abacadaeafag\0"
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"0" "*a*b*[ef]*[cd]*g*\0" "abacadaeafag\0"
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"1" "*abcd*\0" "abcabcabcabcdefg\0"
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"1" "*ab*cd*\0" "abcabcabcabcdefg\0"
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"1" "*abcd*abcdef*\0" "abcabcdabcdeabcdefg\0"
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"0" "*abcd*\0" "abcabcabcabcefg\0"
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"0" "*ab*cd*\0" "abcabcabcabcefg\0";
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static int __init glob_init(void)
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{
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unsigned successes = 0;
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unsigned n = 0;
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char const *p = glob_tests;
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static char const message[] __initconst =
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KERN_INFO "glob: %u self-tests passed, %u failed\n";
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/*
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* Tests are jammed together in a string. The first byte is '1'
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* or '0' to indicate the expected outcome, or '\0' to indicate the
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* end of the tests. Then come two null-terminated strings: the
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* pattern and the string to match it against.
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*/
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while (*p) {
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bool expected = *p++ & 1;
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char const *pat = p;
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p += strlen(p) + 1;
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successes += test(pat, p, expected);
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p += strlen(p) + 1;
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n++;
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}
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n -= successes;
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printk(message, successes, n);
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/* What's the errno for "kernel bug detected"? Guess... */
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return n ? -ECANCELED : 0;
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}
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/* We need a dummy exit function to allow unload */
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static void __exit glob_fini(void) { }
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module_init(glob_init);
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module_exit(glob_fini);
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MODULE_DESCRIPTION("glob(7) matching tests");
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MODULE_LICENSE("Dual MIT/GPL");
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