On 25Sep2007 17:01, aragonx@xxxxxxxxxx <aragonx@xxxxxxxxxx> wrote: | I was wondering. If I have a large log file and I use fopen to write to | it, does it load the entire file into memory before I can write? If not, | how do I know how much memory I am wasting opening that file? No, it doesn't. What purpose would that serve? It will cost you a buffer for the I/O (perhaps 8192 bytes) and a FILE control structure. -- Cameron Simpson <cs@xxxxxxxxxx> DoD#743 http://www.cskk.ezoshosting.com/cs/ Anarchy may not be the best form of government, but it's better than no government at all.