/* * Test cases for lib/string_helpers.c module. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/init.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/random.h> #include <linux/string.h> #include <linux/string_helpers.h> struct test_string { const char *in; const char *out; unsigned int flags; }; static const struct test_string strings[] __initconst = { { .in = "\\f\\ \\n\\r\\t\\v", .out = "\f\\ \n\r\t\v", .flags = UNESCAPE_SPACE, }, { .in = "\\40\\1\\387\\0064\\05\\040\\8a\\110\\777", .out = " \001\00387\0064\005 \\8aH?7", .flags = UNESCAPE_OCTAL, }, { .in = "\\xv\\xa\\x2c\\xD\\x6f2", .out = "\\xv\n,\ro2", .flags = UNESCAPE_HEX, }, { .in = "\\h\\\\\\\"\\a\\e\\", .out = "\\h\\\"\a\e\\", .flags = UNESCAPE_SPECIAL, }, }; static void __init test_string_unescape(unsigned int flags, bool inplace) { char in[256]; char out_test[256]; char out_real[256]; int i, p = 0, q_test = 0, q_real = sizeof(out_real); for (i = 0; i < ARRAY_SIZE(strings); i++) { const char *s = strings[i].in; int len = strlen(strings[i].in); /* Copy string to in buffer */ memcpy(&in[p], s, len); p += len; /* Copy expected result for given flags */ if (flags & strings[i].flags) { s = strings[i].out; len = strlen(strings[i].out); } memcpy(&out_test[q_test], s, len); q_test += len; } in[p++] = '\0'; /* Call string_unescape and compare result */ if (inplace) { memcpy(out_real, in, p); if (flags == UNESCAPE_ANY) q_real = string_unescape_any_inplace(out_real); else q_real = string_unescape_inplace(out_real, flags); } else if (flags == UNESCAPE_ANY) { q_real = string_unescape_any(in, out_real, q_real); } else { q_real = string_unescape(in, out_real, q_real, flags); } if (q_real != q_test || memcmp(out_test, out_real, q_test)) { pr_warn("Test failed: flags = %u\n", flags); print_hex_dump(KERN_WARNING, "Input: ", DUMP_PREFIX_NONE, 16, 1, in, p - 1, true); print_hex_dump(KERN_WARNING, "Expected: ", DUMP_PREFIX_NONE, 16, 1, out_test, q_test, true); print_hex_dump(KERN_WARNING, "Got: ", DUMP_PREFIX_NONE, 16, 1, out_real, q_real, true); } } static int __init test_string_helpers_init(void) { unsigned int i; pr_info("Running tests...\n"); for (i = 0; i < UNESCAPE_ANY + 1; i++) test_string_unescape(i, false); test_string_unescape(get_random_int() % (UNESCAPE_ANY + 1), true); return -EINVAL; } module_init(test_string_helpers_init); MODULE_LICENSE("Dual BSD/GPL");