Rob Landley <rob@xxxxxxxxxxx> writes: > On 5/21/20 10:28 PM, Eric W. Biederman wrote: >> >> Rob Landley <rob@xxxxxxxxxxx> writes: >> >>> On 5/20/20 11:05 AM, Eric W. Biederman wrote: >> >>>> The file descriptor is stored in mm->exe_file. >>>> Probably the most straight forward implementation is to allow >>>> execveat(AT_EXE_FILE, ...). >>> >>> Cool, that works. >>> >>>> You can look at binfmt_misc for how to reopen an open file descriptor. >>> >>> Added to the todo heap. >> >> Yes I don't think it would be a lot of code. >> >> I think you might be better served with clone(CLONE_VM) as it doesn't >> block so you don't need to feed yourself your context over a pipe. > > Except that doesn't fix it. > > Yes I could use threads instead, but the cure is worse than the disease and the > result is your shell background processes are threads rather than independent > processes (is $$ reporting PID or TID, I really don't want to go > there). I was just suggesting clone(CLONE_VM) because it creates a thread in a separate process. Which on nommu sounds like it could be almost exactly what you want. If you need the separate copies of all of your global variables etc, re-exec'ing your self could be the easier way to go. Eric
