On Thu, Apr 14, 2011 at 3:08 PM, David Boyce <david.s.bo...@gmail.com> wrote: > On Thu, Apr 14, 2011 at 2:10 PM, Paul Smith <psm...@gnu.org> wrote: >> I'm not sure I like the idea of having to define a lockfile to enable >> this feature though. It feels a little too much like exposing the >> implementation details to the user. > > Agree. This needs a little more thought.
I don't know why this hasn't occurred to me or the authors of similar programs before, but it appears to be possible to get a lock on any writable file descriptor - for instance stdout or stderr, or one of the jobserver-fds. I just changed syncsh to synchronize around a lock on stdout and it seems to work. This looks much more elegant than specifying a writable file. Or is my understanding of file/pipe/locking semantics flawed? And how would Windows/DOS/VMS/OS2 would do with this? David _______________________________________________ Bug-make mailing list Bug-make@gnu.org http://lists.gnu.org/mailman/listinfo/bug-make
