site_archiver@lists.apple.com Delivered-To: darwin-dev@lists.apple.com On Nov 14, 2008, at 14:37 , Tommy Nordgren wrote: HTH Justin -- Justin C. Walker, Curmudgeon-At-Large, Director Institute for the Enhancement of the Director's Income -------- The path of least resistance: it's not just for electricity any more. -------- _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.appl... Is it possible, to via some low level API, set up a file descriptor so that any data written to it, will be echoed to 2 or more other file descriptors? I want to redirect the output of NSLog, to my own logfile, while keeping all current destinations of log messages. The only way I've found so far is to call the following function: That's about the easiest way I can think of (which doesn't eliminate the possibility of easier or more effective approaches). The problem is that "write()" just takes one file descriptor, and that's the choke point for output. You could write an "intercept" function that takes control when write() is called, uses its args to write to other fd's (that have been set up earlier) and then passes control to the real "write()". That's a lot of work, though. This email sent to site_archiver@lists.apple.com