lib: add module support to glob tests
Extract the glob test code into its own source file, to allow to compile
it either to a loadable module, or builtin into the kernel.
Link: http://lkml.kernel.org/r/1483470276-10517-2-git-send-email-geert@linux-m68k.org
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/lib/globtest.c b/lib/globtest.c
new file mode 100644
index 0000000..d8e97d4
--- /dev/null
+++ b/lib/globtest.c
@@ -0,0 +1,167 @@
+/*
+ * 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;
+}
+
+/*
+ * 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;
+}
+
+/* We need a dummy exit function to allow unload */
+static void __exit glob_fini(void) { }
+
+module_init(glob_init);
+module_exit(glob_fini);
+
+MODULE_DESCRIPTION("glob(7) matching tests");
+MODULE_LICENSE("Dual MIT/GPL");