ref: 61a93fc303fe60819e7a0f9e264c0b592bcb8e93
dir: /libnpe/mkdir.c/
#include <unistd.h>
int
mkdir(char *path, int perm)
{
	int f;
	if(access(path, AEXIST) == 0){
		werrstr("%s: already exists", path);
		return -1;
	}
	if((f = create(path, OREAD, DMDIR|perm)) < 0){
		werrstr("%s: can't create: %r", path);
		return -1;
	}
	close(f);
	return 0;
}