Thanks, Raul. I can't see how to use your C routine without compiling it and calling it using 2!:1 (is that what you meant me to do?) It might seriously corrupt MacOS, which has lots of hidden files open, so I daren't try it. Anyway, can it be an open child file, if the problem doesn't arise with jconsole (jcon701) used in place of JHS?
Now I've at last got my browse tool http://www.jsoftware.com/jwiki/IanClark/LoBrow working with JHS (by launching an essential "client" process independently, so as to get round the 2!:1 hang-up) a lot is coming clear. I think Bill has the right idea. JHS uses smoutput in an essential way to execute input sentences, and it can't just be turned off by setting smoutput_z_=: empty. This impacts on the timer to be used with JHS too, see recent thread. On Thu, Feb 16, 2012 at 1:51 PM, Raul Miller <rauldmil...@gmail.com> wrote: > I do not know, either, but you can close an already closed file handle, so: > > #include <unistd.h> > > void closeMostFiles() { > int f; > for (f= 0; f < 256; f++) { > close(f); > } > } > > If using that routine remedies the symptom you are seeing, it will be > worth looking at this in more depth. If not, it will probably be a > different issues. > > -- > Raul > > On Tue, Feb 14, 2012 at 6:27 PM, Ian Clark <earthspo...@gmail.com> wrote: >> I wasn't aware any file handles were inherited. Where do I find them >> to close? (...Unix rabbit). >> >> (The same code works without trouble in j602.) >> >> On Tue, Feb 14, 2012 at 9:25 PM, Raul Miller <rauldmil...@gmail.com> wrote: >>> Have you tried closing the file handles the child process inherits >>> from the parent? >>> >>> -- >>> Raul >>> >>> On Tue, Feb 14, 2012 at 4:04 PM, Ian Clark <earthspo...@gmail.com> wrote: >>>> 2!:1 is not truly asynchronous in JHS, it seems. The net result is >>>> that I cannot see how to launch a child process without the session >>>> hanging until the child terminates. >>>> >>>> Strange to say, the jijx session immediately resumes, and will accept >>>> (re-)input. But it will not execute the inputted expression. Inside a >>>> verb however, execution continues past 2!:1 (which successfully forks >>>> the child process), but after completion of the verb the session is >>>> silent (until the child process is terminated). >>>> >>>> Example: >>>> Suppose test6s.wav is a sound file lasting 6 seconds. (Chosen to last >>>> long enough to allow "i.6" to be entered.) >>>> >>>> 2!:1 'afplay ~/wav/test6s.wav &' >>>> i.6 >>>> 0 1 2 3 4 5 >>>> >>>> The jijx accepts i.6 but hangs until test6s.wav finishes playing. Only >>>> then does 0 1 2 3 4 5 appear. >>>> >>>> JVERSION >>>> Engine: j701/2011-01-10/11:25 build: Feb 6 2011 16:16:29 >>>> Library: 7.01.055 >>>> Platform: Darwin 64 >>>> Installer: j701a_mac64.dmg >>>> ---------------------------------------------------------------------- >>>> For information about J forums see http://www.jsoftware.com/forums.htm >>> ---------------------------------------------------------------------- >>> For information about J forums see http://www.jsoftware.com/forums.htm >> ---------------------------------------------------------------------- >> For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
