51 lines
1.6 KiB
Python
51 lines
1.6 KiB
Python
"""Examples using create_subprocess_exec() and create_subprocess_shell()."""
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import asyncio
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import signal
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from asyncio.subprocess import PIPE
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@asyncio.coroutine
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def cat(loop):
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proc = yield from asyncio.create_subprocess_shell("cat",
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stdin=PIPE,
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stdout=PIPE)
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print("pid: %s" % proc.pid)
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message = "Hello World!"
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print("cat write: %r" % message)
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stdout, stderr = yield from proc.communicate(message.encode('ascii'))
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print("cat read: %r" % stdout.decode('ascii'))
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exitcode = yield from proc.wait()
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print("(exit code %s)" % exitcode)
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@asyncio.coroutine
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def ls(loop):
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proc = yield from asyncio.create_subprocess_exec("ls",
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stdout=PIPE)
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while True:
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line = yield from proc.stdout.readline()
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if not line:
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break
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print("ls>>", line.decode('ascii').rstrip())
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try:
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proc.send_signal(signal.SIGINT)
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except ProcessLookupError:
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pass
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@asyncio.coroutine
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def test_call(*args, timeout=None):
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try:
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proc = yield from asyncio.create_subprocess_exec(*args)
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exitcode = yield from asyncio.wait_for(proc.wait(), timeout)
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print("%s: exit code %s" % (' '.join(args), exitcode))
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except asyncio.TimeoutError:
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print("timeout! (%.1f sec)" % timeout)
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loop = asyncio.get_event_loop()
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loop.run_until_complete(cat(loop))
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loop.run_until_complete(ls(loop))
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loop.run_until_complete(test_call("bash", "-c", "sleep 3", timeout=1.0))
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loop.close()
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