stdio/remove.c

#include <unistd.h>
#include <errno.h>

int remove(const char *file){
	/* First try to unlink since this is more frequently the necessary action. */
	if(unlink(file) != 0
		/* If it is indeed a directory...  */
		&& (errno != EISDIR
		/* ...try to remove it.	*/
		|| rmdir(file) != 0))
		/* Cannot remove the object for whatever reason.  */
			return -1;

	return 0;
}