ref: 968b518771bd3bda1b30c17cdd1a8911c640966f
dir: /sys/src/libc/9sys/getwd.c/
#include <u.h>
#include <libc.h>
char*
getwd(char *buf, int nbuf)
{
	int n, fd;
	fd = open(".", OREAD|OCEXEC);
	if(fd < 0)
		return nil;
	n = fd2path(fd, buf, nbuf);
	close(fd);
	if(n < 0)
		return nil;
	return buf;
}