I have learned a little more C. Now I know how to open/modify/close files using fopen, fclose, fprintf, and fgets. Als always sample code and universal binaries are available here. Todays programs are called openandreadfile.c, and openandwritefile.c. I am looking into using libosip, and libexosip2 to write a sip client that only a geek would love. Beyond SIP I have enough things that I want to do with the language to keep me going for quite some time, embedded development in particular. This is fun.