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52 lines
1.8 KiB
Python
Executable file
52 lines
1.8 KiB
Python
Executable file
#!/usr/bin/python
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# -*- coding: utf-8 -*-
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import sys, shlex, time, subprocess
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cmd = "./python.subprocess 0 80000"
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args = shlex.split(str(cmd))
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print "cmd: %s, args: %s"%(cmd, args)
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# the communicate will read all data and wait for sub process to quit.
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def use_communicate(args, fout, ferr):
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process = subprocess.Popen(args, stdout=fout, stderr=ferr)
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(stdout_str, stderr_str) = process.communicate()
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return (stdout_str, stderr_str)
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# if use subprocess.PIPE, the pipe will full about 50KB data,
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# and sub process will blocked, then timeout will kill it.
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def use_poll(args, fout, ferr, timeout):
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(stdout_str, stderr_str) = (None, None)
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process = subprocess.Popen(args, stdout=fout, stderr=ferr)
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starttime = time.time()
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while True:
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process.poll()
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if process.returncode is not None:
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(stdout_str, stderr_str) = process.communicate()
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break
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if timeout > 0 and time.time() - starttime >= timeout:
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print "timeout, kill process. timeout=%s"%(timeout)
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process.kill()
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break
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time.sleep(1)
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process.wait()
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return (stdout_str, stderr_str)
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# stdout/stderr can be fd, fileobject, subprocess.PIPE, None
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fnull = open("/dev/null", "rw")
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fout = fnull.fileno()#subprocess.PIPE#fnull#fnull.fileno()
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ferr = fnull.fileno()#subprocess.PIPE#fnull#fnull.fileno()
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print "fout=%s, ferr=%s"%(fout, ferr)
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#(stdout_str, stderr_str) = use_communicate(args, fout, ferr)
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(stdout_str, stderr_str) = use_poll(args, fout, ferr, 10)
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def print_result(stdout_str, stderr_str):
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if stdout_str is None:
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stdout_str = ""
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if stderr_str is None:
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stderr_str = ""
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print "terminated, size of stdout=%s, stderr=%s"%(len(stdout_str), len(stderr_str))
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while True:
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time.sleep(1)
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print_result(stdout_str, stderr_str)
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