cregit-Linux how code gets into the kernel

Release 4.11 lib/globtest.c

Directory: lib
/*
 * Extracted fronm glob.c
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/glob.h>
#include <linux/printk.h>

/* Boot with "glob.verbose=1" to show successful tests, too */

static bool verbose = false;
module_param(verbose, bool, 0);


struct glob_test {
	

char const *pat, *str;
	
bool expected;
};


static bool __pure __init test(char const *pat, char const *str, bool expected) { bool match = glob_match(pat, str); bool success = match == expected; /* Can't get string literals into a particular section, so... */ static char const msg_error[] __initconst = KERN_ERR "glob: \"%s\" vs. \"%s\": %s *** ERROR ***\n"; static char const msg_ok[] __initconst = KERN_DEBUG "glob: \"%s\" vs. \"%s\": %s OK\n"; static char const mismatch[] __initconst = "mismatch"; char const *message; if (!success) message = msg_error; else if (verbose) message = msg_ok; else return success; printk(message, pat, str, mismatch + 3*match); return success; }

Contributors

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Geert Uytterhoeven113100.00%1100.00%
Total113100.00%1100.00%

/* * The tests are all jammed together in one array to make it simpler * to place that array in the .init.rodata section. The obvious * "array of structures containing char *" has no way to force the * pointed-to strings to be in a particular section. * * Anyway, a test consists of: * 1. Expected glob_match result: '1' or '0'. * 2. Pattern to match: null-terminated string * 3. String to match against: null-terminated string * * The list of tests is terminated with a final '\0' instead of * a glob_match result character. */ static char const glob_tests[] __initconst = /* Some basic tests */ "1" "a\0" "a\0" "0" "a\0" "b\0" "0" "a\0" "aa\0" "0" "a\0" "\0" "1" "\0" "\0" "0" "\0" "a\0" /* Simple character class tests */ "1" "[a]\0" "a\0" "0" "[a]\0" "b\0" "0" "[!a]\0" "a\0" "1" "[!a]\0" "b\0" "1" "[ab]\0" "a\0" "1" "[ab]\0" "b\0" "0" "[ab]\0" "c\0" "1" "[!ab]\0" "c\0" "1" "[a-c]\0" "b\0" "0" "[a-c]\0" "d\0" /* Corner cases in character class parsing */ "1" "[a-c-e-g]\0" "-\0" "0" "[a-c-e-g]\0" "d\0" "1" "[a-c-e-g]\0" "f\0" "1" "[]a-ceg-ik[]\0" "a\0" "1" "[]a-ceg-ik[]\0" "]\0" "1" "[]a-ceg-ik[]\0" "[\0" "1" "[]a-ceg-ik[]\0" "h\0" "0" "[]a-ceg-ik[]\0" "f\0" "0" "[!]a-ceg-ik[]\0" "h\0" "0" "[!]a-ceg-ik[]\0" "]\0" "1" "[!]a-ceg-ik[]\0" "f\0" /* Simple wild cards */ "1" "?\0" "a\0" "0" "?\0" "aa\0" "0" "??\0" "a\0" "1" "?x?\0" "axb\0" "0" "?x?\0" "abx\0" "0" "?x?\0" "xab\0" /* Asterisk wild cards (backtracking) */ "0" "*??\0" "a\0" "1" "*??\0" "ab\0" "1" "*??\0" "abc\0" "1" "*??\0" "abcd\0" "0" "??*\0" "a\0" "1" "??*\0" "ab\0" "1" "??*\0" "abc\0" "1" "??*\0" "abcd\0" "0" "?*?\0" "a\0" "1" "?*?\0" "ab\0" "1" "?*?\0" "abc\0" "1" "?*?\0" "abcd\0" "1" "*b\0" "b\0" "1" "*b\0" "ab\0" "0" "*b\0" "ba\0" "1" "*b\0" "bb\0" "1" "*b\0" "abb\0" "1" "*b\0" "bab\0" "1" "*bc\0" "abbc\0" "1" "*bc\0" "bc\0" "1" "*bc\0" "bbc\0" "1" "*bc\0" "bcbc\0" /* Multiple asterisks (complex backtracking) */ "1" "*ac*\0" "abacadaeafag\0" "1" "*ac*ae*ag*\0" "abacadaeafag\0" "1" "*a*b*[bc]*[ef]*g*\0" "abacadaeafag\0" "0" "*a*b*[ef]*[cd]*g*\0" "abacadaeafag\0" "1" "*abcd*\0" "abcabcabcabcdefg\0" "1" "*ab*cd*\0" "abcabcabcabcdefg\0" "1" "*abcd*abcdef*\0" "abcabcdabcdeabcdefg\0" "0" "*abcd*\0" "abcabcabcabcefg\0" "0" "*ab*cd*\0" "abcabcabcabcefg\0";
static int __init glob_init(void) { unsigned successes = 0; unsigned n = 0; char const *p = glob_tests; static char const message[] __initconst = KERN_INFO "glob: %u self-tests passed, %u failed\n"; /* * Tests are jammed together in a string. The first byte is '1' * or '0' to indicate the expected outcome, or '\0' to indicate the * end of the tests. Then come two null-terminated strings: the * pattern and the string to match it against. */ while (*p) { bool expected = *p++ & 1; char const *pat = p; p += strlen(p) + 1; successes += test(pat, p, expected); p += strlen(p) + 1; n++; } n -= successes; printk(message, successes, n); /* What's the errno for "kernel bug detected"? Guess... */ return n ? -ECANCELED : 0; }

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Geert Uytterhoeven114100.00%1100.00%
Total114100.00%1100.00%

/* We need a dummy exit function to allow unload */
static void __exit glob_fini(void) { }

Contributors

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Geert Uytterhoeven8100.00%1100.00%
Total8100.00%1100.00%

module_init(glob_init); module_exit(glob_fini); MODULE_DESCRIPTION("glob(7) matching tests"); MODULE_LICENSE("Dual MIT/GPL");

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Geert Uytterhoeven508100.00%1100.00%
Total508100.00%1100.00%
Directory: lib
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