if (size && !s.avail_in) {
ssize_t rsize = size < sizeof(ibuf) ? size : sizeof(ibuf);
- if (read_in_full(fd, ibuf, rsize) != rsize)
+ ssize_t read_result = read_in_full(fd, ibuf, rsize);
+ if (read_result < 0)
+ die_errno("failed to read from '%s'", path);
+ if (read_result != rsize)
die("failed to read %d bytes from '%s'",
(int)rsize, path);
offset += rsize;