ape: reimplement rename() - fixing compiler warnings and handling more error cases

handle empty filename, dot and dotdot. handle mismatching from/to directory/file
type. cleanup destination file on error. error when attempting to copy non-empty
directories.

little test program:

#include <unistd.h>
#include <stdio.h>

int
main(int argc, char *argv[])
{
	if(argc != 3){
		fprintf(stderr, "usage: %s old new\n", argv[0]);
		return 1;
	}
	if(rename(argv[1], argv[2])){
		perror("rename");
		return 1;
	}
	return 0;
}

0 files changed, 0 insertions, 0 deletions