- if (strncmp (d->d_name, "sd", 2) == 0 ||
- strncmp (d->d_name, "hd", 2) == 0 ||
- strncmp (d->d_name, "vd", 2) == 0 ||
- strncmp (d->d_name, "sr", 2) == 0) {
+ if (STREQLEN (d->d_name, "sd", 2) ||
+ STREQLEN (d->d_name, "hd", 2) ||
+ STREQLEN (d->d_name, "vd", 2) ||
+ STREQLEN (d->d_name, "sr", 2)) {