If you're using fopen(3) "stdio" (buffered I/O), then yeah, fread(3) and friends will buffer. But if you're using open(2) and read(2), libc's not going to buff

If you're using fopen(3) "stdio" (buffered I/O), then yeah, fread(3) and friends will buffer. But if you're using open(2) and read(2), libc's not going to buffer that.