Yes, in j806, 2!:0 had changed and implemented using posix_spawn(), but macos still remained the same and continued to use system() . But you got trouble on mac mini not linux.
Can you also check running with j805 on linux and mac mini? On Nov 23, 2017 10:49 PM, "J. Patrick Harrington" <[email protected]> wrote: > Thanks Chris, > > I'm involved with Thanksgiving right now, but will try this ASAP. > > On Wed, 22 Nov 2017, chris burke wrote: > >> You should be able to do a simple test to see if 2!:0 waits, for example >> as >> below. This does wait on my Mac with the same J as you, except the avx >> version. >> >> F=: jpath '~temp/t1.sh' >> F fwrites~ '#!/bin/bash',LF,'sleep 2',LF,'echo "done"' >> fmakex F >> >> foo=: 3 : 0 >> echo 2!:0 F >> echo 2+3 >> ) >> >> foo'' >> >> On Wed, Nov 22, 2017 at 7:28 PM, J. Patrick Harrington <[email protected] >> > >> wrote: >> >> Bill, >>> >>> I've tried that. ../synmod.exe < fort.5 > fort.6 in a terinal >>> window works fine on all three machines. And the directory change >>> is OK. WHen the program fails on the Mac Mini, the J session is >>> left in the /home/tages/tlusty205/synspec/jph directory. >>> >>> Patrick >>> >>> On Thu, 23 Nov 2017, bill lam wrote: >>> >>> You can try executing the cmd in bash shell to verify whether it actually >>>> work on the other machine. >>>> >>>> Also check the cwd in J session to see it is correct. >>>> >>>> On Nov 23, 2017 12:54 AM, "J. Patrick Harrington" <[email protected]> >>>> wrote: >>>> >>>> A>> A problem has surfaced which has me puzzled. I have written a >>>> >>> >>> program which needs the results of another program, synmod.exe, which >>> >>>> reads in a file, executes for a few seconds, and writes the results >>>>> to the file fort.6 (synmod.exe is my modification of a 10,000 line >>>>> fortran program). The relevant part of my program is as follows: >>>>> >>>>> LAM=: IX=: QX=: <'' >>>>> 1!:44 '/home/tages/tlusty205/synspec/jph' >>>>> 'Ti gi lam1 lam2'=. y >>>>> fix55 lam1, lam2 NB. put lam1 & lam2 into fort.55 >>>>> lngg=. 10^. gi >>>>> nh=. -:#Ti >>>>> i=. _1 >>>>> while. (i=. >:i)<nh do. >>>>> Tii=. i{Ti >>>>> lngi=. i{lngg >>>>> Kbicub Tii, lngi >>>>> 2!:0 '../synmod.exe < fort.5 > fort.6' >>>>> Z=. lam2 CLEAN Extract'' >>>>> 'mu rad deg lam Flx Ia Qa pol'=. Z >>>>> LAM=: LAM, <lam >>>>> IX=: IX, <Ia >>>>> QX=: QX, <Qa >>>>> end. >>>>> 1!:44 '/home/tages/J6/SPIN.d' >>>>> >>>>> The issue here is the Foreign 2!:0. This code works *perfectly* on my >>>>> Dell >>>>> laptop running >>>>> JVERSION >>>>> Engine: j806/j64/linux >>>>> Release: commercial/2017-11-06T09:54:01 >>>>> Library: 8.06.09 >>>>> Qt IDE: 1.6.2/5.3.2 >>>>> Platform: Linux 64 >>>>> Installer: J806 install >>>>> InstallPath: /home/tages/j64-806 >>>>> >>>>> But... the very same code running on either of the other two machines I >>>>> use fails. The line 2!:0 '../synmod.exe < fort.5 > fort.6' >>>>> should write the results of synmod to the file fort.6, but >>>>> instead defines fort.6 but writes nothing to it. Thus the >>>>> Extract'' routine fails when it tries to read fort.6. >>>>> >>>>> I suspect that while 2!:0 waits for synmod.exe to finish, maybe >>>>> on my other machines it transfers to the next line of the J code >>>>> before fort.6 is written. One of these machines is a Mac Mini running >>>>> JVERSION >>>>> Engine: j806/j64nonavx/darwin >>>>> Release: commercial/2017-11-06T10:18:00 >>>>> Library: 8.06.09 >>>>> Qt IDE: 1.6.2s/5.6.3 >>>>> Platform: Darwin 64 >>>>> Installer: J806 install >>>>> InstallPath: /users/jph/j64-806 >>>>> >>>>> So I'm asking if the foreign 2!:0 in some cases returns without >>>>> waiting. I thought just 2!:1 did that. >>>>> >>>>> Apologies for the long-winded post, Patrick >>>>> >>>>> ---------------------------------------------------------------------- >>>>> 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 ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
