|
596
|
1 #!/usr/bin/env python
|
|
|
2
|
|
|
3 """
|
|
|
4 multiprocessing/subprocess experiments
|
|
|
5 """
|
|
|
6
|
|
|
7 import argparse
|
|
|
8 import os
|
|
|
9 import subprocess
|
|
|
10 import sys
|
|
|
11 import time
|
|
|
12 import tempfile
|
|
|
13
|
|
600
|
14 class
|
|
596
|
15
|
|
|
16 def main(args=sys.argv[1:]):
|
|
599
|
17 """CLI"""
|
|
596
|
18
|
|
600
|
19 # available programs
|
|
|
20 progs = {'yes': ["yes"],
|
|
|
21 'ping': ['ping', 'google.com']}
|
|
|
22
|
|
|
23
|
|
599
|
24 # parse command line
|
|
596
|
25 usage = '%prog [options]'
|
|
|
26 parser = argparse.ArgumentParser(usage=usage, description=__doc__)
|
|
|
27 parser.add_argument("-t", "--time", dest="time",
|
|
599
|
28 type=float, default=4.,
|
|
|
29 help="seconds to run for")
|
|
|
30 parser.add_argument("-s", "--sleep", dest="sleep",
|
|
596
|
31 type=float, default=1.,
|
|
600
|
32 help="sleep this number of seconds between polling")
|
|
|
33 parser.add_argument("-p", "--prog", dest='program',
|
|
|
34 choices=progs.keys(),
|
|
|
35 help="subprocess to run")
|
|
|
36 # TODO parser.add_argument("--list-programs", help="list available programs")
|
|
596
|
37 options = parser.parse_args(args)
|
|
|
38
|
|
599
|
39
|
|
|
40 # select program
|
|
600
|
41 prog = progs[options.program]
|
|
599
|
42
|
|
|
43 # start the main subprocess loop
|
|
|
44 # TODO -> OO
|
|
596
|
45 output = tempfile.SpooledTemporaryFile()
|
|
|
46 start = time.time()
|
|
|
47 proc = subprocess.Popen(prog, stdout=output)
|
|
599
|
48 location = 0
|
|
596
|
49 while proc.poll() is None:
|
|
599
|
50 curr_time = time.time()
|
|
|
51 run_time = curr_time - start
|
|
|
52 if run_time > options.time:
|
|
596
|
53 proc.kill()
|
|
599
|
54 if options.sleep:
|
|
|
55 time.sleep(options.sleep)
|
|
|
56 output.seek(location)
|
|
|
57 read = output.read()
|
|
|
58 location += len(read)
|
|
|
59 print ('[{}] {}\n{}'.format(run_time, read, '-==-'*10))
|
|
596
|
60
|
|
|
61 # reset tempfile
|
|
|
62 output.seek(0)
|
|
|
63
|
|
|
64 n_lines = len(output.read().splitlines())
|
|
|
65 print ("{}: {} lines".format(subprocess.list2cmdline(prog), n_lines))
|
|
|
66
|
|
|
67 if __name__ == '__main__':
|
|
|
68 main()
|
