On 05/02/2015 06:51 PM, Alex Norman wrote: you can debug a running process with gdb by using gdb -p <pid> you can at the beginning of your program do something like: close(1); close(2); dup2(some_fd, 1); dup2(some_fd, 2); so as to redirect stdout/stderr to where you want. "some_fd" could even be something like /dev/pts/XX that you get from a running xterm or whatever and you get output in that xterm. "ps aux" gives you the column TTY you can also put some sleep code or whatever so that you have time to find the PID of your program and attach gdb to it before anything happens