Program stalls when called via Popen4?
joshp at cra.com
Fri Mar 21 16:37:13 CET 2003
Thanks! Thats probably the problem, I'll try it soon!
Ulrich Petri wrote:
>> > Everything seems to be working correctly, EXCEPT that the popen2.Popen4
>> > instance I'm using to actually build our project never returns. When I
>> > 'watch' what the subprocess is doing by using 'ps aux', it seems that
>> > it has stalled on the first call to 'echo'! I'm not sure how to debug
>> > this because when I try to duplicate the results manually, everything
>> > works fine.
>> Do you read the output of compileProcess?
>> If not the buffer of the pipe will fill and then block the child.
>> You can use something like this:
>> data = compileProcess.fromchild.read(1)
>> while 1:
>> if data == "":
>> ret = compileProcess.poll()
>> if ret != -1:
>> ret = compileProcess.read(1)
Joshua Pollak 617-491-3474 x586
Software Engineer joshp at cra.com
Charles River Analytics
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