- if (do_lseek(map->fd,read_start,SEEK_SET) != read_start) {
- rprintf(FERROR,"lseek failed in map_ptr\n");
+ OFF_T ret = do_lseek(map->fd, read_start, SEEK_SET);
+ if (ret != read_start) {
+ rsyserr(FERROR, errno,
+ "lseek returned %.0f, not %.0f",
+ (double)ret, (double)read_start);