ssize_t actually_read;
size_t offset = 0, remaining = len - 1;
- while ((actually_read = readN(fd, buf + offset, remaining)) == remaining) {
+ while ((actually_read = readN(fd, buf + offset, remaining)) == (ssize_t)remaining) {
char *newbuf = realloc(buf, 2 * len);
if (!newbuf) {
free(buf);