32 lines
899 B
Python
32 lines
899 B
Python
# Copyright The IETF Trust 2010-2019, All Rights Reserved
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# Simplified interface to os.popen3()
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def pipe(cmd:bytes, str:bytes=None) -> (int, bytes, bytes):
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from subprocess import Popen, PIPE
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bufsize = 4096
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MAX = 65536*16
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if str and len(str) > 4096: # XXX: Hardcoded Linux 2.4, 2.6 pipe buffer size
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bufsize = len(str)
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pipe = Popen(cmd, stdin=PIPE, stdout=PIPE, stderr=PIPE, bufsize=bufsize, shell=True)
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if not str is None:
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pipe.stdin.write(str)
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pipe.stdin.close()
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out = b""
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err = b""
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while True:
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str = pipe.stdout.read()
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if str:
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out += str
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code = pipe.poll()
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if code > -1:
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err = pipe.stderr.read()
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break
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if len(out) >= MAX:
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err = "Output exceeds %s bytes and has been truncated" % MAX
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break
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return (code, out, err)
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