mkostemp
int mkostemp(char *, int);
if ((fd = mkostemp(path, O_CLOEXEC)) != -1)
if ((hashp->fp = mkostemp(path, O_CLOEXEC)) != -1) {
fd_stdout = mkostemp(stdout_file, O_SYNC);
fd_stderr = mkostemp(stderr_file, O_SYNC);