make echo better

src/echo.c

@@ -1,16 +1,15 @@
 #include <sysexits.h>
 #include <stddef.h> /* NULL */
 #include <unistd.h> /* write(2) */
+#include "libio.h" /* fdprint(3) */
 
 int main(int argc, char **argv){
-	int s;
 
 	if(*argv == NULL)
 		return EX_OSERR;
 	
 	while(*++argv != NULL){
-		for(s = 0; *(*argv+s) != '\0'; ++s);
-		write(1, *argv, s);
+		fdprint(1, *argv);
 
 		if(*(argv+1) != NULL)
 			write(1, " ", 1);