add pwd, thanks stateless

pwd.c

@@ -0,0 +1,22 @@
+/* See LICENSE file for copyright and license details. */
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include "util.h"
+
+int
+main(void)
+{
+	char *buf;
+	long size;
+
+	if((size = pathconf(".", _PC_PATH_MAX)) < 0)
+		size = BUFSIZ;
+	if(!(buf = malloc(size)))
+		eprintf("malloc:");
+	if(!getcwd(buf, size))
+		eprintf("getcwd:");
+
+	puts(buf);
+	return EXIT_SUCCESS;
+}