#include <u.h>#include <libc.h> voidmain(int argc, char *argv[]){	char *pr;	int n; 	if(argc < 2){		fprint(2, "usage: basename string [suffix]\n");		exits("usage");	}	pr = utfrrune(argv[1], '/');	if(pr)		pr++;	else		pr = argv[1];	if(argc==3){		n = strlen(pr)-strlen(argv[2]);		if(n >= 0 && !strcmp(pr+n, argv[2]))			pr[n] = 0;	}	print("%s\n", pr);	exits(0);}