#include <linux/ctype.h>#include <linux/types.h> int strcasecmp(const char *s1, const char *s2){	int c1, c2; 	do {		c1 = tolower(*s1++);		c2 = tolower(*s2++);	} while (c1 == c2 && c1 != 0);	return c1 - c2;} int strncasecmp(const char *s1, const char *s2, size_t n){	int c1, c2; 	do {		c1 = tolower(*s1++);		c2 = tolower(*s2++);	} while ((--n > 0) && c1 == c2 && c1 != 0);	return c1 - c2;}