It's a duplicate here...
You can't do a fork and then call into Carbon or Cocoa. You can only call into Carbon or Cocoa in a fresh process. You'll need to fork/execve instead. Not sure if that will toss the zombies, but that is at least one thing wrong with this code.
-bob
On Mar 7, 2005, at 7:45 PM, Nathaniel Gray wrote:
I sent this last week and haven't seen it come through on the list yet. Sorry if it's a duplicate...
---------- Forwarded message ---------- From: Nathaniel Gray <[EMAIL PROTECTED]> Date: Wed, 2 Mar 2005 19:02:44 -0800 Subject: EasyDialogs + Appscript + iPhoto = zombies! To: Pythonmac-Sig <pythonmac-sig@python.org>
Hi,
I've written a small appscript that exports an iPhoto album using the "album" photo album tool (written in Perl, but I don't have time to rewrite it... :-/). I wrote the Python script and installed it as /Library/Scripts/Applications/iPhoto/iphoto2album so I can use it from the global Scripts menu. It works fine, but it leaves a zombie Python process lying around every time I run it. I don't know a whole lot about unix process control, but I found that to avoid zombie processes you need to "double-fork". So here's a mock-up of my current code, mostly copied from http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/66012:
#### BEGIN #! /usr/bin/env pythonw import os, sys import EasyDialogs as dialogs, datetime from appscript import * def main(): # This is obviously a dummy main function errfile = open("/Users/n8gray/ip2a.errors", "w") errfile.write("Made it!") errfile.close() dialogs.Message( "Everything works ok." )
try:
pid = os.fork()
if pid > 0:
# exit first parent
sys.exit(0)
except OSError, e:
print >>sys.stderr, "fork #1 failed: %d (%s)" % (e.errno, e.strerror)
sys.exit(1)
# decouple from parent environment #os.chdir("/") # I've tried with and without this line. os.setsid() os.umask(0)
# do second fork
try:
pid = os.fork()
if pid > 0:
# exit from second parent, print eventual PID before
# print "Daemon PID %d" % pid
sys.exit(0)
except OSError, e:
print >>sys.stderr, "fork #2 failed: %d (%s)" % (e.errno, e.strerror)
sys.exit(1)
# Open file descriptors if not sys.stderr: sys.stderr = sys.stdout si = file('/dev/null', 'r') so = file('/dev/null', 'a+') se = file('/dev/null', 'a+', 0)
# Redirect standard file descriptors. os.dup2(si.fileno(), sys.stdin.fileno()) os.dup2(so.fileno(), sys.stdout.fileno()) os.dup2(se.fileno(), sys.stderr.fileno())
# start the daemon main loop main() #### END
Unfortunately, it still produces a zombie after each run and I don't see the dialog either. The error log file does get written to, though, so I know the double-fork succeeds.
Can anybody help me figure out what the problems are? Also, is there any way to get rid of all the damn zombie processes on my system without rebooting?
Thanks, -n8
---- Nathaniel Gray -- Caltech Computer Science ------> -- Mojave Project -- http://mojave.cs.caltech.edu -->_______________________________________________ Pythonmac-SIG maillist - Pythonmac-SIG@python.org http://mail.python.org/mailman/listinfo/pythonmac-sig
_______________________________________________ Pythonmac-SIG maillist - Pythonmac-SIG@python.org http://mail.python.org/mailman/listinfo/pythonmac-sig
