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@cannium
Created July 6, 2015 02:01
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example for double fork
import os
import sys
print 'pid,pgid,sid', os.getpid(), os.getpgid(0), os.getsid(0)
pid = os.fork()
if pid > 0:
sys.exit(0)
print 'pid,pgid,sid', os.getpid(), os.getpgid(0), os.getsid(0)
os.setsid()
print 'pid,pgid,sid', os.getpid(), os.getpgid(0), os.getsid(0)
pid = os.fork()
if pid > 0:
sys.exit(0)
print 'pid,pgid,sid', os.getpid(), os.getpgid(0), os.getsid(0)
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