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:> (Joerg) :> :> What about something similiar to SIGCHLD? :> : (David) :It is better to avoid signal wrapper in thread library, simplicity :is better. There is an issue of event notification. It sure would be nice if we had it. What if we added a third argument... a file descriptor that the kernel writes an exit record to. -1 could be specified if the feature is not desired. #include <unistd.h> __sys_set_exit_feature(int *addr, int data, int fd); Upon exit the specified data is written to the specified user address and a sys_exit_record structure is written to the specified descriptor. Both features are optional. addr may be specified as NULL and/or fd may be specified as -1. -Matt Matthew Dillon <dillon@backplane.com>