Why passing socket objects over execution

I-feng Kao - EECS (ikao@gandalf.eecs.wsu.edu)
Thu, 4 Aug 1994 21:31:12 GMT

Okay, I'm not sure I've quite worked out what you're trying to do:

parent ->forks-> child->execs->another program
parent must communicate two-ways or one-way with other program ?

- presumably pipes are not good enough (one or two way) ?

- if you want sockets, do a listen then do select on the file
descriptor, and when this completes, do accept, so:

s = socket (AF_INET, SOCK_STREAM, 0)
s.bind ((222.222.222.222, 1040))
s.listen (1)
^^^^^^^^^^^^^^^^^^^^^^Program stops here.

read, write, exc = select ([s.fileno()],[],[], timeout)
if s.fileno() in read:
news = s.accept ()
s.close()

Note: this is quick hack, use with care :-)

Adrian

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= Adrian Phillips at            | BUT any thoughts in this are purely    =
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This is similar to what I am using right now, The problem is the program stops
at listening until having a connection. Rest of the program will not be 
executed until a connection comes in. So I can either doing idle detection
with some timer which sends out signal or having connection before forking
a child and passing the socket object to the new program that child executes.







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|   I-feng Kao          internet : ikao@eecs.wsu.edu                 |
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|   I-feng Kao         	  E-mail : ikao@eecs.wsu.edu                 |
|                                  i8974949@wsuaix.csc.wsu.edu       |
|                                  kao@wsuvm1.csc.wsu.edu            |