NCA_HISTORY
if ((f = fopen(NCA_HISTORY, "r")) == NULL) {
err(1, "failed to open %s", NCA_HISTORY);
warnx("error reading %s", NCA_HISTORY);
unlink(NCA_HISTORY);
char temp[] = NCA_HISTORY ".XXXXXXXX";
unlink(NCA_HISTORY);
if (rename(temp, NCA_HISTORY) == -1)
strcmp(e->fts_name, NCA_HISTORY) == 0)