No, there isn't--for one thing, the system fopen() call 
won't do it. However, what you can do is create a new file
with a temporary name (see tempnam()), write your new 
content to it, append the contents of the original file, 
delete the original file, and rename the new file with the 
name of the original one.

BTW, you shouldn't use the bug database to ask questions; 
that's what the mailing lists are for. Using the bug 
database for this sort of thing just clogs it up...


Torben